8378 lines
249 KiB
C
8378 lines
249 KiB
C
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nghttp2_session.h"
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#include <string.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <assert.h>
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#include <stdarg.h>
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#include "nghttp2_helper.h"
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#include "nghttp2_net.h"
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#include "nghttp2_priority_spec.h"
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#include "nghttp2_option.h"
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#include "nghttp2_http.h"
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#include "nghttp2_pq.h"
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#include "nghttp2_extpri.h"
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#include "nghttp2_debug.h"
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/*
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* Returns non-zero if the number of outgoing opened streams is larger
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* than or equal to
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* remote_settings.max_concurrent_streams.
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*/
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static int
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session_is_outgoing_concurrent_streams_max(nghttp2_session *session) {
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return session->remote_settings.max_concurrent_streams <=
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session->num_outgoing_streams;
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}
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/*
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* Returns non-zero if the number of incoming opened streams is larger
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* than or equal to
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* local_settings.max_concurrent_streams.
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*/
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static int
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session_is_incoming_concurrent_streams_max(nghttp2_session *session) {
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return session->local_settings.max_concurrent_streams <=
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session->num_incoming_streams;
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}
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/*
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* Returns non-zero if the number of incoming opened streams is larger
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* than or equal to
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* session->pending_local_max_concurrent_stream.
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*/
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static int
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session_is_incoming_concurrent_streams_pending_max(nghttp2_session *session) {
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return session->pending_local_max_concurrent_stream <=
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session->num_incoming_streams;
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}
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/*
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* Returns non-zero if |lib_error| is non-fatal error.
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*/
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static int is_non_fatal(int lib_error_code) {
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return lib_error_code < 0 && lib_error_code > NGHTTP2_ERR_FATAL;
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}
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int nghttp2_is_fatal(int lib_error_code) {
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return lib_error_code < NGHTTP2_ERR_FATAL;
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}
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static int session_enforce_http_messaging(nghttp2_session *session) {
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return (session->opt_flags & NGHTTP2_OPTMASK_NO_HTTP_MESSAGING) == 0;
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}
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/*
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* Returns nonzero if |frame| is trailer headers.
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*/
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static int session_trailer_headers(nghttp2_session *session,
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nghttp2_stream *stream,
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nghttp2_frame *frame) {
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if (!stream || frame->hd.type != NGHTTP2_HEADERS) {
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return 0;
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}
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if (session->server) {
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return frame->headers.cat == NGHTTP2_HCAT_HEADERS;
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}
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return frame->headers.cat == NGHTTP2_HCAT_HEADERS &&
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(stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) == 0;
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}
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/* Returns nonzero if the |stream| is in reserved(remote) state */
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static int state_reserved_remote(nghttp2_session *session,
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nghttp2_stream *stream) {
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return stream->state == NGHTTP2_STREAM_RESERVED &&
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!nghttp2_session_is_my_stream_id(session, stream->stream_id);
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}
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/* Returns nonzero if the |stream| is in reserved(local) state */
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static int state_reserved_local(nghttp2_session *session,
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nghttp2_stream *stream) {
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return stream->state == NGHTTP2_STREAM_RESERVED &&
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nghttp2_session_is_my_stream_id(session, stream->stream_id);
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}
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/*
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* Checks whether received stream_id is valid. This function returns
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* 1 if it succeeds, or 0.
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*/
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static int session_is_new_peer_stream_id(nghttp2_session *session,
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int32_t stream_id) {
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return stream_id != 0 &&
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!nghttp2_session_is_my_stream_id(session, stream_id) &&
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session->last_recv_stream_id < stream_id;
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}
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static int session_detect_idle_stream(nghttp2_session *session,
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int32_t stream_id) {
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/* Assume that stream object with stream_id does not exist */
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if (nghttp2_session_is_my_stream_id(session, stream_id)) {
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if (session->last_sent_stream_id < stream_id) {
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return 1;
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}
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return 0;
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}
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if (session_is_new_peer_stream_id(session, stream_id)) {
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return 1;
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}
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return 0;
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}
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static int session_no_rfc7540_pri_no_fallback(nghttp2_session *session) {
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return session->pending_no_rfc7540_priorities == 1 &&
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!session->fallback_rfc7540_priorities;
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}
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static int check_ext_type_set(const uint8_t *ext_types, uint8_t type) {
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return (ext_types[type / 8] & (1 << (type & 0x7))) > 0;
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}
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static int session_call_error_callback(nghttp2_session *session,
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int lib_error_code, const char *fmt,
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...) {
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size_t bufsize;
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va_list ap;
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char *buf;
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int rv;
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nghttp2_mem *mem;
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if (!session->callbacks.error_callback &&
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!session->callbacks.error_callback2) {
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return 0;
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}
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mem = &session->mem;
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va_start(ap, fmt);
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rv = vsnprintf(NULL, 0, fmt, ap);
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va_end(ap);
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if (rv < 0) {
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return NGHTTP2_ERR_NOMEM;
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}
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bufsize = (size_t)(rv + 1);
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buf = nghttp2_mem_malloc(mem, bufsize);
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if (buf == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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va_start(ap, fmt);
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rv = vsnprintf(buf, bufsize, fmt, ap);
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va_end(ap);
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if (rv < 0) {
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nghttp2_mem_free(mem, buf);
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/* vsnprintf may return error because of various things we can
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imagine, but typically we don't want to drop session just for
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debug callback. */
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DEBUGF("error_callback: vsnprintf failed. The template was %s\n", fmt);
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return 0;
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}
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if (session->callbacks.error_callback2) {
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rv = session->callbacks.error_callback2(session, lib_error_code, buf,
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(size_t)rv, session->user_data);
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} else {
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rv = session->callbacks.error_callback(session, buf, (size_t)rv,
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session->user_data);
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}
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nghttp2_mem_free(mem, buf);
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if (rv != 0) {
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return NGHTTP2_ERR_CALLBACK_FAILURE;
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}
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return 0;
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}
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static int session_terminate_session(nghttp2_session *session,
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int32_t last_stream_id,
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uint32_t error_code, const char *reason) {
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int rv;
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const uint8_t *debug_data;
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size_t debug_datalen;
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if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) {
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return 0;
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}
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/* Ignore all incoming frames because we are going to tear down the
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session. */
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session->iframe.state = NGHTTP2_IB_IGN_ALL;
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if (reason == NULL) {
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debug_data = NULL;
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debug_datalen = 0;
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} else {
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debug_data = (const uint8_t *)reason;
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debug_datalen = strlen(reason);
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}
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rv = nghttp2_session_add_goaway(session, last_stream_id, error_code,
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debug_data, debug_datalen,
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NGHTTP2_GOAWAY_AUX_TERM_ON_SEND);
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if (rv != 0) {
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return rv;
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}
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session->goaway_flags |= NGHTTP2_GOAWAY_TERM_ON_SEND;
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return 0;
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}
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int nghttp2_session_terminate_session(nghttp2_session *session,
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uint32_t error_code) {
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return session_terminate_session(session, session->last_proc_stream_id,
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error_code, NULL);
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}
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int nghttp2_session_terminate_session2(nghttp2_session *session,
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int32_t last_stream_id,
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uint32_t error_code) {
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return session_terminate_session(session, last_stream_id, error_code, NULL);
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}
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int nghttp2_session_terminate_session_with_reason(nghttp2_session *session,
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uint32_t error_code,
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const char *reason) {
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return session_terminate_session(session, session->last_proc_stream_id,
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error_code, reason);
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}
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int nghttp2_session_is_my_stream_id(nghttp2_session *session,
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int32_t stream_id) {
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int rem;
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if (stream_id == 0) {
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return 0;
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}
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rem = stream_id & 0x1;
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if (session->server) {
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return rem == 0;
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}
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return rem == 1;
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}
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nghttp2_stream *nghttp2_session_get_stream(nghttp2_session *session,
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int32_t stream_id) {
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nghttp2_stream *stream;
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stream = (nghttp2_stream *)nghttp2_map_find(&session->streams, stream_id);
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if (stream == NULL || (stream->flags & NGHTTP2_STREAM_FLAG_CLOSED) ||
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stream->state == NGHTTP2_STREAM_IDLE) {
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return NULL;
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}
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return stream;
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}
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nghttp2_stream *nghttp2_session_get_stream_raw(nghttp2_session *session,
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int32_t stream_id) {
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return (nghttp2_stream *)nghttp2_map_find(&session->streams, stream_id);
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}
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static void session_inbound_frame_reset(nghttp2_session *session) {
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nghttp2_inbound_frame *iframe = &session->iframe;
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nghttp2_mem *mem = &session->mem;
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/* A bit risky code, since if this function is called from
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nghttp2_session_new(), we rely on the fact that
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iframe->frame.hd.type is 0, so that no free is performed. */
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switch (iframe->frame.hd.type) {
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case NGHTTP2_DATA:
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break;
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case NGHTTP2_HEADERS:
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nghttp2_frame_headers_free(&iframe->frame.headers, mem);
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break;
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case NGHTTP2_PRIORITY:
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nghttp2_frame_priority_free(&iframe->frame.priority);
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break;
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case NGHTTP2_RST_STREAM:
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nghttp2_frame_rst_stream_free(&iframe->frame.rst_stream);
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break;
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case NGHTTP2_SETTINGS:
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nghttp2_frame_settings_free(&iframe->frame.settings, mem);
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nghttp2_mem_free(mem, iframe->iv);
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iframe->iv = NULL;
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iframe->niv = 0;
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iframe->max_niv = 0;
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break;
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case NGHTTP2_PUSH_PROMISE:
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nghttp2_frame_push_promise_free(&iframe->frame.push_promise, mem);
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break;
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case NGHTTP2_PING:
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nghttp2_frame_ping_free(&iframe->frame.ping);
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break;
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case NGHTTP2_GOAWAY:
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nghttp2_frame_goaway_free(&iframe->frame.goaway, mem);
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break;
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case NGHTTP2_WINDOW_UPDATE:
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nghttp2_frame_window_update_free(&iframe->frame.window_update);
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break;
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default:
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/* extension frame */
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if (check_ext_type_set(session->user_recv_ext_types,
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iframe->frame.hd.type)) {
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nghttp2_frame_extension_free(&iframe->frame.ext);
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} else {
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switch (iframe->frame.hd.type) {
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case NGHTTP2_ALTSVC:
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if ((session->builtin_recv_ext_types & NGHTTP2_TYPEMASK_ALTSVC) == 0) {
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break;
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}
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nghttp2_frame_altsvc_free(&iframe->frame.ext, mem);
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break;
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case NGHTTP2_ORIGIN:
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if ((session->builtin_recv_ext_types & NGHTTP2_TYPEMASK_ORIGIN) == 0) {
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break;
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}
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nghttp2_frame_origin_free(&iframe->frame.ext, mem);
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break;
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case NGHTTP2_PRIORITY_UPDATE:
|
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if ((session->builtin_recv_ext_types &
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NGHTTP2_TYPEMASK_PRIORITY_UPDATE) == 0) {
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break;
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}
|
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/* Do not call nghttp2_frame_priority_update_free, because all
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fields point to sbuf. */
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break;
|
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}
|
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}
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break;
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}
|
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|
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memset(&iframe->frame, 0, sizeof(nghttp2_frame));
|
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memset(&iframe->ext_frame_payload, 0, sizeof(nghttp2_ext_frame_payload));
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iframe->state = NGHTTP2_IB_READ_HEAD;
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|
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nghttp2_buf_wrap_init(&iframe->sbuf, iframe->raw_sbuf,
|
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sizeof(iframe->raw_sbuf));
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iframe->sbuf.mark += NGHTTP2_FRAME_HDLEN;
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|
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nghttp2_buf_free(&iframe->lbuf, mem);
|
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nghttp2_buf_wrap_init(&iframe->lbuf, NULL, 0);
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|
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iframe->raw_lbuf = NULL;
|
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|
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iframe->payloadleft = 0;
|
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iframe->padlen = 0;
|
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}
|
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|
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static void init_settings(nghttp2_settings_storage *settings) {
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settings->header_table_size = NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE;
|
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settings->enable_push = 1;
|
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settings->max_concurrent_streams = NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS;
|
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settings->initial_window_size = NGHTTP2_INITIAL_WINDOW_SIZE;
|
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settings->max_frame_size = NGHTTP2_MAX_FRAME_SIZE_MIN;
|
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settings->max_header_list_size = UINT32_MAX;
|
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settings->no_rfc7540_priorities = UINT32_MAX;
|
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}
|
|
|
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static void active_outbound_item_reset(nghttp2_active_outbound_item *aob,
|
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nghttp2_mem *mem) {
|
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DEBUGF("send: reset nghttp2_active_outbound_item\n");
|
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DEBUGF("send: aob->item = %p\n", aob->item);
|
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nghttp2_outbound_item_free(aob->item, mem);
|
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nghttp2_mem_free(mem, aob->item);
|
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aob->item = NULL;
|
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nghttp2_bufs_reset(&aob->framebufs);
|
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aob->state = NGHTTP2_OB_POP_ITEM;
|
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}
|
|
|
|
#define NGHTTP2_STREAM_MAX_CYCLE_GAP ((uint64_t)NGHTTP2_MAX_FRAME_SIZE_MAX)
|
|
|
|
static int stream_less(const void *lhsx, const void *rhsx) {
|
|
const nghttp2_stream *lhs, *rhs;
|
|
|
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lhs = nghttp2_struct_of(lhsx, nghttp2_stream, pq_entry);
|
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rhs = nghttp2_struct_of(rhsx, nghttp2_stream, pq_entry);
|
|
|
|
if (lhs->cycle == rhs->cycle) {
|
|
return lhs->seq < rhs->seq;
|
|
}
|
|
|
|
return rhs->cycle - lhs->cycle <= NGHTTP2_STREAM_MAX_CYCLE_GAP;
|
|
}
|
|
|
|
int nghttp2_enable_strict_preface = 1;
|
|
|
|
static int session_new(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data, int server,
|
|
const nghttp2_option *option, nghttp2_mem *mem) {
|
|
int rv;
|
|
size_t nbuffer;
|
|
size_t max_deflate_dynamic_table_size =
|
|
NGHTTP2_HD_DEFAULT_MAX_DEFLATE_BUFFER_SIZE;
|
|
size_t i;
|
|
|
|
if (mem == NULL) {
|
|
mem = nghttp2_mem_default();
|
|
}
|
|
|
|
*session_ptr = nghttp2_mem_calloc(mem, 1, sizeof(nghttp2_session));
|
|
if (*session_ptr == NULL) {
|
|
rv = NGHTTP2_ERR_NOMEM;
|
|
goto fail_session;
|
|
}
|
|
|
|
(*session_ptr)->mem = *mem;
|
|
mem = &(*session_ptr)->mem;
|
|
|
|
/* next_stream_id is initialized in either
|
|
nghttp2_session_client_new2 or nghttp2_session_server_new2 */
|
|
|
|
nghttp2_stream_init(&(*session_ptr)->root, 0, NGHTTP2_STREAM_FLAG_NONE,
|
|
NGHTTP2_STREAM_IDLE, NGHTTP2_DEFAULT_WEIGHT, 0, 0, NULL,
|
|
mem);
|
|
|
|
(*session_ptr)->remote_window_size = NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE;
|
|
(*session_ptr)->recv_window_size = 0;
|
|
(*session_ptr)->consumed_size = 0;
|
|
(*session_ptr)->recv_reduction = 0;
|
|
(*session_ptr)->local_window_size = NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE;
|
|
|
|
(*session_ptr)->goaway_flags = NGHTTP2_GOAWAY_NONE;
|
|
(*session_ptr)->local_last_stream_id = (1u << 31) - 1;
|
|
(*session_ptr)->remote_last_stream_id = (1u << 31) - 1;
|
|
|
|
(*session_ptr)->pending_local_max_concurrent_stream =
|
|
NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS;
|
|
(*session_ptr)->pending_enable_push = 1;
|
|
(*session_ptr)->pending_no_rfc7540_priorities = UINT8_MAX;
|
|
|
|
if (server) {
|
|
(*session_ptr)->server = 1;
|
|
}
|
|
|
|
init_settings(&(*session_ptr)->remote_settings);
|
|
init_settings(&(*session_ptr)->local_settings);
|
|
|
|
(*session_ptr)->max_incoming_reserved_streams =
|
|
NGHTTP2_MAX_INCOMING_RESERVED_STREAMS;
|
|
|
|
/* Limit max outgoing concurrent streams to sensible value */
|
|
(*session_ptr)->remote_settings.max_concurrent_streams = 100;
|
|
|
|
(*session_ptr)->max_send_header_block_length = NGHTTP2_MAX_HEADERSLEN;
|
|
(*session_ptr)->max_outbound_ack = NGHTTP2_DEFAULT_MAX_OBQ_FLOOD_ITEM;
|
|
(*session_ptr)->max_settings = NGHTTP2_DEFAULT_MAX_SETTINGS;
|
|
|
|
if (option) {
|
|
if ((option->opt_set_mask & NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE) &&
|
|
option->no_auto_window_update) {
|
|
|
|
(*session_ptr)->opt_flags |= NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE;
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_PEER_MAX_CONCURRENT_STREAMS) {
|
|
|
|
(*session_ptr)->remote_settings.max_concurrent_streams =
|
|
option->peer_max_concurrent_streams;
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_MAX_RESERVED_REMOTE_STREAMS) {
|
|
|
|
(*session_ptr)->max_incoming_reserved_streams =
|
|
option->max_reserved_remote_streams;
|
|
}
|
|
|
|
if ((option->opt_set_mask & NGHTTP2_OPT_NO_RECV_CLIENT_MAGIC) &&
|
|
option->no_recv_client_magic) {
|
|
|
|
(*session_ptr)->opt_flags |= NGHTTP2_OPTMASK_NO_RECV_CLIENT_MAGIC;
|
|
}
|
|
|
|
if ((option->opt_set_mask & NGHTTP2_OPT_NO_HTTP_MESSAGING) &&
|
|
option->no_http_messaging) {
|
|
|
|
(*session_ptr)->opt_flags |= NGHTTP2_OPTMASK_NO_HTTP_MESSAGING;
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_USER_RECV_EXT_TYPES) {
|
|
memcpy((*session_ptr)->user_recv_ext_types, option->user_recv_ext_types,
|
|
sizeof((*session_ptr)->user_recv_ext_types));
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_BUILTIN_RECV_EXT_TYPES) {
|
|
(*session_ptr)->builtin_recv_ext_types = option->builtin_recv_ext_types;
|
|
}
|
|
|
|
if ((option->opt_set_mask & NGHTTP2_OPT_NO_AUTO_PING_ACK) &&
|
|
option->no_auto_ping_ack) {
|
|
(*session_ptr)->opt_flags |= NGHTTP2_OPTMASK_NO_AUTO_PING_ACK;
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_MAX_SEND_HEADER_BLOCK_LENGTH) {
|
|
(*session_ptr)->max_send_header_block_length =
|
|
option->max_send_header_block_length;
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_MAX_DEFLATE_DYNAMIC_TABLE_SIZE) {
|
|
max_deflate_dynamic_table_size = option->max_deflate_dynamic_table_size;
|
|
}
|
|
|
|
if ((option->opt_set_mask & NGHTTP2_OPT_NO_CLOSED_STREAMS) &&
|
|
option->no_closed_streams) {
|
|
(*session_ptr)->opt_flags |= NGHTTP2_OPTMASK_NO_CLOSED_STREAMS;
|
|
}
|
|
|
|
if (option->opt_set_mask & NGHTTP2_OPT_MAX_OUTBOUND_ACK) {
|
|
(*session_ptr)->max_outbound_ack = option->max_outbound_ack;
|
|
}
|
|
|
|
if ((option->opt_set_mask & NGHTTP2_OPT_MAX_SETTINGS) &&
|
|
option->max_settings) {
|
|
(*session_ptr)->max_settings = option->max_settings;
|
|
}
|
|
|
|
if ((option->opt_set_mask &
|
|
NGHTTP2_OPT_SERVER_FALLBACK_RFC7540_PRIORITIES) &&
|
|
option->server_fallback_rfc7540_priorities) {
|
|
(*session_ptr)->opt_flags |=
|
|
NGHTTP2_OPTMASK_SERVER_FALLBACK_RFC7540_PRIORITIES;
|
|
}
|
|
}
|
|
|
|
rv = nghttp2_hd_deflate_init2(&(*session_ptr)->hd_deflater,
|
|
max_deflate_dynamic_table_size, mem);
|
|
if (rv != 0) {
|
|
goto fail_hd_deflater;
|
|
}
|
|
rv = nghttp2_hd_inflate_init(&(*session_ptr)->hd_inflater, mem);
|
|
if (rv != 0) {
|
|
goto fail_hd_inflater;
|
|
}
|
|
rv = nghttp2_map_init(&(*session_ptr)->streams, mem);
|
|
if (rv != 0) {
|
|
goto fail_map;
|
|
}
|
|
|
|
nbuffer = ((*session_ptr)->max_send_header_block_length +
|
|
NGHTTP2_FRAMEBUF_CHUNKLEN - 1) /
|
|
NGHTTP2_FRAMEBUF_CHUNKLEN;
|
|
|
|
if (nbuffer == 0) {
|
|
nbuffer = 1;
|
|
}
|
|
|
|
/* 1 for Pad Field. */
|
|
rv = nghttp2_bufs_init3(&(*session_ptr)->aob.framebufs,
|
|
NGHTTP2_FRAMEBUF_CHUNKLEN, nbuffer, 1,
|
|
NGHTTP2_FRAME_HDLEN + 1, mem);
|
|
if (rv != 0) {
|
|
goto fail_aob_framebuf;
|
|
}
|
|
|
|
active_outbound_item_reset(&(*session_ptr)->aob, mem);
|
|
|
|
(*session_ptr)->callbacks = *callbacks;
|
|
(*session_ptr)->user_data = user_data;
|
|
|
|
session_inbound_frame_reset(*session_ptr);
|
|
|
|
if (nghttp2_enable_strict_preface) {
|
|
nghttp2_inbound_frame *iframe = &(*session_ptr)->iframe;
|
|
|
|
if (server && ((*session_ptr)->opt_flags &
|
|
NGHTTP2_OPTMASK_NO_RECV_CLIENT_MAGIC) == 0) {
|
|
iframe->state = NGHTTP2_IB_READ_CLIENT_MAGIC;
|
|
iframe->payloadleft = NGHTTP2_CLIENT_MAGIC_LEN;
|
|
} else {
|
|
iframe->state = NGHTTP2_IB_READ_FIRST_SETTINGS;
|
|
}
|
|
|
|
if (!server) {
|
|
(*session_ptr)->aob.state = NGHTTP2_OB_SEND_CLIENT_MAGIC;
|
|
nghttp2_bufs_add(&(*session_ptr)->aob.framebufs, NGHTTP2_CLIENT_MAGIC,
|
|
NGHTTP2_CLIENT_MAGIC_LEN);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < NGHTTP2_EXTPRI_URGENCY_LEVELS; ++i) {
|
|
nghttp2_pq_init(&(*session_ptr)->sched[i].ob_data, stream_less, mem);
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail_aob_framebuf:
|
|
nghttp2_map_free(&(*session_ptr)->streams);
|
|
fail_map:
|
|
nghttp2_hd_inflate_free(&(*session_ptr)->hd_inflater);
|
|
fail_hd_inflater:
|
|
nghttp2_hd_deflate_free(&(*session_ptr)->hd_deflater);
|
|
fail_hd_deflater:
|
|
nghttp2_mem_free(mem, *session_ptr);
|
|
fail_session:
|
|
return rv;
|
|
}
|
|
|
|
int nghttp2_session_client_new(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data) {
|
|
return nghttp2_session_client_new3(session_ptr, callbacks, user_data, NULL,
|
|
NULL);
|
|
}
|
|
|
|
int nghttp2_session_client_new2(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data, const nghttp2_option *option) {
|
|
return nghttp2_session_client_new3(session_ptr, callbacks, user_data, option,
|
|
NULL);
|
|
}
|
|
|
|
int nghttp2_session_client_new3(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data, const nghttp2_option *option,
|
|
nghttp2_mem *mem) {
|
|
int rv;
|
|
nghttp2_session *session;
|
|
|
|
rv = session_new(&session, callbacks, user_data, 0, option, mem);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
/* IDs for use in client */
|
|
session->next_stream_id = 1;
|
|
|
|
*session_ptr = session;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_server_new(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data) {
|
|
return nghttp2_session_server_new3(session_ptr, callbacks, user_data, NULL,
|
|
NULL);
|
|
}
|
|
|
|
int nghttp2_session_server_new2(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data, const nghttp2_option *option) {
|
|
return nghttp2_session_server_new3(session_ptr, callbacks, user_data, option,
|
|
NULL);
|
|
}
|
|
|
|
int nghttp2_session_server_new3(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data, const nghttp2_option *option,
|
|
nghttp2_mem *mem) {
|
|
int rv;
|
|
nghttp2_session *session;
|
|
|
|
rv = session_new(&session, callbacks, user_data, 1, option, mem);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
/* IDs for use in client */
|
|
session->next_stream_id = 2;
|
|
|
|
*session_ptr = session;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int free_streams(void *entry, void *ptr) {
|
|
nghttp2_session *session;
|
|
nghttp2_stream *stream;
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_mem *mem;
|
|
|
|
session = (nghttp2_session *)ptr;
|
|
mem = &session->mem;
|
|
stream = (nghttp2_stream *)entry;
|
|
item = stream->item;
|
|
|
|
if (item && !item->queued && item != session->aob.item) {
|
|
nghttp2_outbound_item_free(item, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
}
|
|
|
|
nghttp2_stream_free(stream);
|
|
nghttp2_mem_free(mem, stream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ob_q_free(nghttp2_outbound_queue *q, nghttp2_mem *mem) {
|
|
nghttp2_outbound_item *item, *next;
|
|
for (item = q->head; item;) {
|
|
next = item->qnext;
|
|
nghttp2_outbound_item_free(item, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
item = next;
|
|
}
|
|
}
|
|
|
|
static int inflight_settings_new(nghttp2_inflight_settings **settings_ptr,
|
|
const nghttp2_settings_entry *iv, size_t niv,
|
|
nghttp2_mem *mem) {
|
|
*settings_ptr = nghttp2_mem_malloc(mem, sizeof(nghttp2_inflight_settings));
|
|
if (!*settings_ptr) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
if (niv > 0) {
|
|
(*settings_ptr)->iv = nghttp2_frame_iv_copy(iv, niv, mem);
|
|
if (!(*settings_ptr)->iv) {
|
|
nghttp2_mem_free(mem, *settings_ptr);
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else {
|
|
(*settings_ptr)->iv = NULL;
|
|
}
|
|
|
|
(*settings_ptr)->niv = niv;
|
|
(*settings_ptr)->next = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void inflight_settings_del(nghttp2_inflight_settings *settings,
|
|
nghttp2_mem *mem) {
|
|
if (!settings) {
|
|
return;
|
|
}
|
|
|
|
nghttp2_mem_free(mem, settings->iv);
|
|
nghttp2_mem_free(mem, settings);
|
|
}
|
|
|
|
void nghttp2_session_del(nghttp2_session *session) {
|
|
nghttp2_mem *mem;
|
|
nghttp2_inflight_settings *settings;
|
|
size_t i;
|
|
|
|
if (session == NULL) {
|
|
return;
|
|
}
|
|
|
|
mem = &session->mem;
|
|
|
|
for (settings = session->inflight_settings_head; settings;) {
|
|
nghttp2_inflight_settings *next = settings->next;
|
|
inflight_settings_del(settings, mem);
|
|
settings = next;
|
|
}
|
|
|
|
for (i = 0; i < NGHTTP2_EXTPRI_URGENCY_LEVELS; ++i) {
|
|
nghttp2_pq_free(&session->sched[i].ob_data);
|
|
}
|
|
nghttp2_stream_free(&session->root);
|
|
|
|
/* Have to free streams first, so that we can check
|
|
stream->item->queued */
|
|
nghttp2_map_each_free(&session->streams, free_streams, session);
|
|
nghttp2_map_free(&session->streams);
|
|
|
|
ob_q_free(&session->ob_urgent, mem);
|
|
ob_q_free(&session->ob_reg, mem);
|
|
ob_q_free(&session->ob_syn, mem);
|
|
|
|
active_outbound_item_reset(&session->aob, mem);
|
|
session_inbound_frame_reset(session);
|
|
nghttp2_hd_deflate_free(&session->hd_deflater);
|
|
nghttp2_hd_inflate_free(&session->hd_inflater);
|
|
nghttp2_bufs_free(&session->aob.framebufs);
|
|
nghttp2_mem_free(mem, session);
|
|
}
|
|
|
|
int nghttp2_session_reprioritize_stream(
|
|
nghttp2_session *session, nghttp2_stream *stream,
|
|
const nghttp2_priority_spec *pri_spec_in) {
|
|
int rv;
|
|
nghttp2_stream *dep_stream = NULL;
|
|
nghttp2_priority_spec pri_spec_default;
|
|
const nghttp2_priority_spec *pri_spec = pri_spec_in;
|
|
|
|
assert((!session->server && session->pending_no_rfc7540_priorities != 1) ||
|
|
(session->server && !session_no_rfc7540_pri_no_fallback(session)));
|
|
assert(pri_spec->stream_id != stream->stream_id);
|
|
|
|
if (!nghttp2_stream_in_dep_tree(stream)) {
|
|
return 0;
|
|
}
|
|
|
|
if (pri_spec->stream_id != 0) {
|
|
dep_stream = nghttp2_session_get_stream_raw(session, pri_spec->stream_id);
|
|
|
|
if (!dep_stream &&
|
|
session_detect_idle_stream(session, pri_spec->stream_id)) {
|
|
|
|
nghttp2_priority_spec_default_init(&pri_spec_default);
|
|
|
|
dep_stream = nghttp2_session_open_stream(
|
|
session, pri_spec->stream_id, NGHTTP2_FLAG_NONE, &pri_spec_default,
|
|
NGHTTP2_STREAM_IDLE, NULL);
|
|
|
|
if (dep_stream == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else if (!dep_stream || !nghttp2_stream_in_dep_tree(dep_stream)) {
|
|
nghttp2_priority_spec_default_init(&pri_spec_default);
|
|
pri_spec = &pri_spec_default;
|
|
}
|
|
}
|
|
|
|
if (pri_spec->stream_id == 0) {
|
|
dep_stream = &session->root;
|
|
} else if (nghttp2_stream_dep_find_ancestor(dep_stream, stream)) {
|
|
DEBUGF("stream: cycle detected, dep_stream(%p)=%d stream(%p)=%d\n",
|
|
dep_stream, dep_stream->stream_id, stream, stream->stream_id);
|
|
|
|
nghttp2_stream_dep_remove_subtree(dep_stream);
|
|
rv = nghttp2_stream_dep_add_subtree(stream->dep_prev, dep_stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
assert(dep_stream);
|
|
|
|
if (dep_stream == stream->dep_prev && !pri_spec->exclusive) {
|
|
/* This is minor optimization when just weight is changed. */
|
|
nghttp2_stream_change_weight(stream, pri_spec->weight);
|
|
|
|
return 0;
|
|
}
|
|
|
|
nghttp2_stream_dep_remove_subtree(stream);
|
|
|
|
/* We have to update weight after removing stream from tree */
|
|
stream->weight = pri_spec->weight;
|
|
|
|
if (pri_spec->exclusive) {
|
|
rv = nghttp2_stream_dep_insert_subtree(dep_stream, stream);
|
|
} else {
|
|
rv = nghttp2_stream_dep_add_subtree(dep_stream, stream);
|
|
}
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint64_t pq_get_first_cycle(nghttp2_pq *pq) {
|
|
nghttp2_stream *stream;
|
|
|
|
if (nghttp2_pq_empty(pq)) {
|
|
return 0;
|
|
}
|
|
|
|
stream = nghttp2_struct_of(nghttp2_pq_top(pq), nghttp2_stream, pq_entry);
|
|
return stream->cycle;
|
|
}
|
|
|
|
static int session_ob_data_push(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
uint32_t urgency;
|
|
int inc;
|
|
nghttp2_pq *pq;
|
|
|
|
assert(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES);
|
|
assert(stream->queued == 0);
|
|
|
|
urgency = nghttp2_extpri_uint8_urgency(stream->extpri);
|
|
inc = nghttp2_extpri_uint8_inc(stream->extpri);
|
|
|
|
assert(urgency < NGHTTP2_EXTPRI_URGENCY_LEVELS);
|
|
|
|
pq = &session->sched[urgency].ob_data;
|
|
|
|
stream->cycle = pq_get_first_cycle(pq);
|
|
if (inc) {
|
|
stream->cycle += stream->last_writelen;
|
|
}
|
|
|
|
rv = nghttp2_pq_push(pq, &stream->pq_entry);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
stream->queued = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_ob_data_remove(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
uint32_t urgency;
|
|
|
|
assert(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES);
|
|
assert(stream->queued == 1);
|
|
|
|
urgency = nghttp2_extpri_uint8_urgency(stream->extpri);
|
|
|
|
assert(urgency < NGHTTP2_EXTPRI_URGENCY_LEVELS);
|
|
|
|
nghttp2_pq_remove(&session->sched[urgency].ob_data, &stream->pq_entry);
|
|
|
|
stream->queued = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_attach_stream_item(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
nghttp2_outbound_item *item) {
|
|
int rv;
|
|
|
|
rv = nghttp2_stream_attach_item(stream, item);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if (!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES)) {
|
|
return 0;
|
|
}
|
|
|
|
return session_ob_data_push(session, stream);
|
|
}
|
|
|
|
static int session_detach_stream_item(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
|
|
rv = nghttp2_stream_detach_item(stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if (!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES) ||
|
|
!stream->queued) {
|
|
return 0;
|
|
}
|
|
|
|
return session_ob_data_remove(session, stream);
|
|
}
|
|
|
|
static int session_defer_stream_item(nghttp2_session *session,
|
|
nghttp2_stream *stream, uint8_t flags) {
|
|
int rv;
|
|
|
|
rv = nghttp2_stream_defer_item(stream, flags);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if (!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES) ||
|
|
!stream->queued) {
|
|
return 0;
|
|
}
|
|
|
|
return session_ob_data_remove(session, stream);
|
|
}
|
|
|
|
static int session_resume_deferred_stream_item(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
uint8_t flags) {
|
|
int rv;
|
|
|
|
rv = nghttp2_stream_resume_deferred_item(stream, flags);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if (!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES) ||
|
|
(stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL)) {
|
|
return 0;
|
|
}
|
|
|
|
return session_ob_data_push(session, stream);
|
|
}
|
|
|
|
static nghttp2_outbound_item *
|
|
session_sched_get_next_outbound_item(nghttp2_session *session) {
|
|
size_t i;
|
|
nghttp2_pq_entry *ent;
|
|
nghttp2_stream *stream;
|
|
|
|
for (i = 0; i < NGHTTP2_EXTPRI_URGENCY_LEVELS; ++i) {
|
|
ent = nghttp2_pq_top(&session->sched[i].ob_data);
|
|
if (!ent) {
|
|
continue;
|
|
}
|
|
|
|
stream = nghttp2_struct_of(ent, nghttp2_stream, pq_entry);
|
|
return stream->item;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int session_sched_empty(nghttp2_session *session) {
|
|
size_t i;
|
|
|
|
for (i = 0; i < NGHTTP2_EXTPRI_URGENCY_LEVELS; ++i) {
|
|
if (!nghttp2_pq_empty(&session->sched[i].ob_data)) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void session_sched_reschedule_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
nghttp2_pq *pq;
|
|
uint32_t urgency = nghttp2_extpri_uint8_urgency(stream->extpri);
|
|
int inc = nghttp2_extpri_uint8_inc(stream->extpri);
|
|
uint64_t penalty = (uint64_t)stream->last_writelen;
|
|
int rv;
|
|
|
|
(void)rv;
|
|
|
|
assert(urgency < NGHTTP2_EXTPRI_URGENCY_LEVELS);
|
|
|
|
pq = &session->sched[urgency].ob_data;
|
|
|
|
if (!inc || nghttp2_pq_size(pq) == 1) {
|
|
return;
|
|
}
|
|
|
|
nghttp2_pq_remove(pq, &stream->pq_entry);
|
|
|
|
stream->cycle += penalty;
|
|
|
|
rv = nghttp2_pq_push(pq, &stream->pq_entry);
|
|
|
|
assert(0 == rv);
|
|
}
|
|
|
|
static int session_update_stream_priority(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
uint8_t u8extpri) {
|
|
if (stream->extpri == u8extpri) {
|
|
return 0;
|
|
}
|
|
|
|
if (stream->queued) {
|
|
session_ob_data_remove(session, stream);
|
|
|
|
stream->extpri = u8extpri;
|
|
|
|
return session_ob_data_push(session, stream);
|
|
}
|
|
|
|
stream->extpri = u8extpri;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_add_item(nghttp2_session *session,
|
|
nghttp2_outbound_item *item) {
|
|
/* TODO Return error if stream is not found for the frame requiring
|
|
stream presence. */
|
|
int rv = 0;
|
|
nghttp2_stream *stream;
|
|
nghttp2_frame *frame;
|
|
|
|
frame = &item->frame;
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
switch (frame->hd.type) {
|
|
case NGHTTP2_DATA:
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
|
|
if (stream->item) {
|
|
return NGHTTP2_ERR_DATA_EXIST;
|
|
}
|
|
|
|
rv = session_attach_stream_item(session, stream, item);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
case NGHTTP2_HEADERS:
|
|
/* We push request HEADERS and push response HEADERS to
|
|
dedicated queue because their transmission is affected by
|
|
SETTINGS_MAX_CONCURRENT_STREAMS */
|
|
/* TODO If 2 HEADERS are submitted for reserved stream, then
|
|
both of them are queued into ob_syn, which is not
|
|
desirable. */
|
|
if (frame->headers.cat == NGHTTP2_HCAT_REQUEST ||
|
|
(stream && stream->state == NGHTTP2_STREAM_RESERVED)) {
|
|
nghttp2_outbound_queue_push(&session->ob_syn, item);
|
|
item->queued = 1;
|
|
return 0;
|
|
;
|
|
}
|
|
|
|
nghttp2_outbound_queue_push(&session->ob_reg, item);
|
|
item->queued = 1;
|
|
return 0;
|
|
case NGHTTP2_SETTINGS:
|
|
case NGHTTP2_PING:
|
|
nghttp2_outbound_queue_push(&session->ob_urgent, item);
|
|
item->queued = 1;
|
|
return 0;
|
|
case NGHTTP2_RST_STREAM:
|
|
if (stream) {
|
|
stream->state = NGHTTP2_STREAM_CLOSING;
|
|
}
|
|
nghttp2_outbound_queue_push(&session->ob_reg, item);
|
|
item->queued = 1;
|
|
return 0;
|
|
case NGHTTP2_PUSH_PROMISE: {
|
|
nghttp2_headers_aux_data *aux_data;
|
|
nghttp2_priority_spec pri_spec;
|
|
|
|
aux_data = &item->aux_data.headers;
|
|
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
|
|
nghttp2_priority_spec_init(&pri_spec, stream->stream_id,
|
|
NGHTTP2_DEFAULT_WEIGHT, 0);
|
|
|
|
if (!nghttp2_session_open_stream(
|
|
session, frame->push_promise.promised_stream_id,
|
|
NGHTTP2_STREAM_FLAG_NONE, &pri_spec, NGHTTP2_STREAM_RESERVED,
|
|
aux_data->stream_user_data)) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
/* We don't have to call nghttp2_session_adjust_closed_stream()
|
|
here, since stream->stream_id is local stream_id, and it does
|
|
not affect closed stream count. */
|
|
|
|
nghttp2_outbound_queue_push(&session->ob_reg, item);
|
|
item->queued = 1;
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
if (stream) {
|
|
stream->window_update_queued = 1;
|
|
} else if (frame->hd.stream_id == 0) {
|
|
session->window_update_queued = 1;
|
|
}
|
|
nghttp2_outbound_queue_push(&session->ob_reg, item);
|
|
item->queued = 1;
|
|
return 0;
|
|
default:
|
|
nghttp2_outbound_queue_push(&session->ob_reg, item);
|
|
item->queued = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int nghttp2_session_add_rst_stream(nghttp2_session *session, int32_t stream_id,
|
|
uint32_t error_code) {
|
|
int rv;
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_frame *frame;
|
|
nghttp2_stream *stream;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream && stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return 0;
|
|
}
|
|
|
|
/* Sending RST_STREAM to an idle stream is subject to protocol
|
|
violation. Historically, nghttp2 allows this. In order not to
|
|
disrupt the existing applications, we don't error out this case
|
|
and simply ignore it. */
|
|
if (nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
if ((uint32_t)stream_id >= session->next_stream_id) {
|
|
return 0;
|
|
}
|
|
} else if (session->last_recv_stream_id < stream_id) {
|
|
return 0;
|
|
}
|
|
|
|
/* Cancel pending request HEADERS in ob_syn if this RST_STREAM
|
|
refers to that stream. */
|
|
if (!session->server && nghttp2_session_is_my_stream_id(session, stream_id) &&
|
|
nghttp2_outbound_queue_top(&session->ob_syn)) {
|
|
nghttp2_headers_aux_data *aux_data;
|
|
nghttp2_frame *headers_frame;
|
|
|
|
headers_frame = &nghttp2_outbound_queue_top(&session->ob_syn)->frame;
|
|
assert(headers_frame->hd.type == NGHTTP2_HEADERS);
|
|
|
|
if (headers_frame->hd.stream_id <= stream_id) {
|
|
|
|
for (item = session->ob_syn.head; item; item = item->qnext) {
|
|
aux_data = &item->aux_data.headers;
|
|
|
|
if (item->frame.hd.stream_id < stream_id) {
|
|
continue;
|
|
}
|
|
|
|
/* stream_id in ob_syn queue must be strictly increasing. If
|
|
we found larger ID, then we can break here. */
|
|
if (item->frame.hd.stream_id > stream_id || aux_data->canceled) {
|
|
break;
|
|
}
|
|
|
|
aux_data->error_code = error_code;
|
|
aux_data->canceled = 1;
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
|
|
if (item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_outbound_item_init(item);
|
|
|
|
frame = &item->frame;
|
|
|
|
nghttp2_frame_rst_stream_init(&frame->rst_stream, stream_id, error_code);
|
|
rv = nghttp2_session_add_item(session, item);
|
|
if (rv != 0) {
|
|
nghttp2_frame_rst_stream_free(&frame->rst_stream);
|
|
nghttp2_mem_free(mem, item);
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
nghttp2_stream *nghttp2_session_open_stream(nghttp2_session *session,
|
|
int32_t stream_id, uint8_t flags,
|
|
nghttp2_priority_spec *pri_spec_in,
|
|
nghttp2_stream_state initial_state,
|
|
void *stream_user_data) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_stream *dep_stream = NULL;
|
|
int stream_alloc = 0;
|
|
nghttp2_priority_spec pri_spec_default;
|
|
nghttp2_priority_spec *pri_spec = pri_spec_in;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
stream = nghttp2_session_get_stream_raw(session, stream_id);
|
|
|
|
if (stream) {
|
|
assert(stream->state == NGHTTP2_STREAM_IDLE);
|
|
assert((stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES) ||
|
|
nghttp2_stream_in_dep_tree(stream));
|
|
|
|
if (nghttp2_stream_in_dep_tree(stream)) {
|
|
assert(!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES));
|
|
nghttp2_session_detach_idle_stream(session, stream);
|
|
rv = nghttp2_stream_dep_remove(stream);
|
|
if (rv != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (session_no_rfc7540_pri_no_fallback(session)) {
|
|
stream->flags |= NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES;
|
|
}
|
|
}
|
|
} else {
|
|
stream = nghttp2_mem_malloc(mem, sizeof(nghttp2_stream));
|
|
if (stream == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
stream_alloc = 1;
|
|
}
|
|
|
|
if (session_no_rfc7540_pri_no_fallback(session) ||
|
|
session->remote_settings.no_rfc7540_priorities == 1) {
|
|
/* For client which has not received server
|
|
SETTINGS_NO_RFC7540_PRIORITIES = 1, send a priority signal
|
|
opportunistically. */
|
|
if (session->server ||
|
|
session->remote_settings.no_rfc7540_priorities == 1) {
|
|
nghttp2_priority_spec_default_init(&pri_spec_default);
|
|
pri_spec = &pri_spec_default;
|
|
}
|
|
|
|
if (session->pending_no_rfc7540_priorities == 1) {
|
|
flags |= NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES;
|
|
}
|
|
} else if (pri_spec->stream_id != 0) {
|
|
dep_stream = nghttp2_session_get_stream_raw(session, pri_spec->stream_id);
|
|
|
|
if (!dep_stream &&
|
|
session_detect_idle_stream(session, pri_spec->stream_id)) {
|
|
/* Depends on idle stream, which does not exist in memory.
|
|
Assign default priority for it. */
|
|
nghttp2_priority_spec_default_init(&pri_spec_default);
|
|
|
|
dep_stream = nghttp2_session_open_stream(
|
|
session, pri_spec->stream_id, NGHTTP2_FLAG_NONE, &pri_spec_default,
|
|
NGHTTP2_STREAM_IDLE, NULL);
|
|
|
|
if (dep_stream == NULL) {
|
|
if (stream_alloc) {
|
|
nghttp2_mem_free(mem, stream);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
} else if (!dep_stream || !nghttp2_stream_in_dep_tree(dep_stream)) {
|
|
/* If dep_stream is not part of dependency tree, stream will get
|
|
default priority. This handles the case when
|
|
pri_spec->stream_id == stream_id. This happens because we
|
|
don't check pri_spec->stream_id against new stream ID in
|
|
nghttp2_submit_request. This also handles the case when idle
|
|
stream created by PRIORITY frame was opened. Somehow we
|
|
first remove the idle stream from dependency tree. This is
|
|
done to simplify code base, but ideally we should retain old
|
|
dependency. But I'm not sure this adds values. */
|
|
nghttp2_priority_spec_default_init(&pri_spec_default);
|
|
pri_spec = &pri_spec_default;
|
|
}
|
|
}
|
|
|
|
if (initial_state == NGHTTP2_STREAM_RESERVED) {
|
|
flags |= NGHTTP2_STREAM_FLAG_PUSH;
|
|
}
|
|
|
|
if (stream_alloc) {
|
|
nghttp2_stream_init(stream, stream_id, flags, initial_state,
|
|
pri_spec->weight,
|
|
(int32_t)session->remote_settings.initial_window_size,
|
|
(int32_t)session->local_settings.initial_window_size,
|
|
stream_user_data, mem);
|
|
|
|
if (session_no_rfc7540_pri_no_fallback(session)) {
|
|
stream->seq = session->stream_seq++;
|
|
}
|
|
|
|
rv = nghttp2_map_insert(&session->streams, stream_id, stream);
|
|
if (rv != 0) {
|
|
nghttp2_stream_free(stream);
|
|
nghttp2_mem_free(mem, stream);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
stream->flags = flags;
|
|
stream->state = initial_state;
|
|
stream->weight = pri_spec->weight;
|
|
stream->stream_user_data = stream_user_data;
|
|
}
|
|
|
|
switch (initial_state) {
|
|
case NGHTTP2_STREAM_RESERVED:
|
|
if (nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
/* reserved (local) */
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
} else {
|
|
/* reserved (remote) */
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
|
|
++session->num_incoming_reserved_streams;
|
|
}
|
|
/* Reserved stream does not count in the concurrent streams
|
|
limit. That is one of the DOS vector. */
|
|
break;
|
|
case NGHTTP2_STREAM_IDLE:
|
|
/* Idle stream does not count toward the concurrent streams limit.
|
|
This is used as anchor node in dependency tree. */
|
|
nghttp2_session_keep_idle_stream(session, stream);
|
|
break;
|
|
default:
|
|
if (nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
++session->num_outgoing_streams;
|
|
} else {
|
|
++session->num_incoming_streams;
|
|
}
|
|
}
|
|
|
|
if (stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES) {
|
|
return stream;
|
|
}
|
|
|
|
if (pri_spec->stream_id == 0) {
|
|
dep_stream = &session->root;
|
|
}
|
|
|
|
assert(dep_stream);
|
|
|
|
if (pri_spec->exclusive) {
|
|
rv = nghttp2_stream_dep_insert(dep_stream, stream);
|
|
if (rv != 0) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
nghttp2_stream_dep_add(dep_stream, stream);
|
|
}
|
|
|
|
return stream;
|
|
}
|
|
|
|
int nghttp2_session_close_stream(nghttp2_session *session, int32_t stream_id,
|
|
uint32_t error_code) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_mem *mem;
|
|
int is_my_stream_id;
|
|
|
|
mem = &session->mem;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
DEBUGF("stream: stream(%p)=%d close\n", stream, stream->stream_id);
|
|
|
|
if (stream->item) {
|
|
nghttp2_outbound_item *item;
|
|
|
|
item = stream->item;
|
|
|
|
rv = session_detach_stream_item(session, stream);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
/* If item is queued, it will be deleted when it is popped
|
|
(nghttp2_session_prep_frame() will fail). If session->aob.item
|
|
points to this item, let active_outbound_item_reset()
|
|
free the item. */
|
|
if (!item->queued && item != session->aob.item) {
|
|
nghttp2_outbound_item_free(item, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
}
|
|
}
|
|
|
|
/* We call on_stream_close_callback even if stream->state is
|
|
NGHTTP2_STREAM_INITIAL. This will happen while sending request
|
|
HEADERS, a local endpoint receives RST_STREAM for that stream. It
|
|
may be PROTOCOL_ERROR, but without notifying stream closure will
|
|
hang the stream in a local endpoint.
|
|
*/
|
|
|
|
if (session->callbacks.on_stream_close_callback) {
|
|
if (session->callbacks.on_stream_close_callback(
|
|
session, stream_id, error_code, session->user_data) != 0) {
|
|
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
|
|
is_my_stream_id = nghttp2_session_is_my_stream_id(session, stream_id);
|
|
|
|
/* pushed streams which is not opened yet is not counted toward max
|
|
concurrent limits */
|
|
if ((stream->flags & NGHTTP2_STREAM_FLAG_PUSH)) {
|
|
if (!is_my_stream_id) {
|
|
--session->num_incoming_reserved_streams;
|
|
}
|
|
} else {
|
|
if (is_my_stream_id) {
|
|
--session->num_outgoing_streams;
|
|
} else {
|
|
--session->num_incoming_streams;
|
|
}
|
|
}
|
|
|
|
/* Closes both directions just in case they are not closed yet */
|
|
stream->flags |= NGHTTP2_STREAM_FLAG_CLOSED;
|
|
|
|
if (session->pending_no_rfc7540_priorities == 1) {
|
|
return nghttp2_session_destroy_stream(session, stream);
|
|
}
|
|
|
|
if ((session->opt_flags & NGHTTP2_OPTMASK_NO_CLOSED_STREAMS) == 0 &&
|
|
session->server && !is_my_stream_id &&
|
|
nghttp2_stream_in_dep_tree(stream)) {
|
|
/* On server side, retain stream at most MAX_CONCURRENT_STREAMS
|
|
combined with the current active incoming streams to make
|
|
dependency tree work better. */
|
|
nghttp2_session_keep_closed_stream(session, stream);
|
|
} else {
|
|
rv = nghttp2_session_destroy_stream(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_destroy_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
nghttp2_mem *mem;
|
|
int rv;
|
|
|
|
DEBUGF("stream: destroy closed stream(%p)=%d\n", stream, stream->stream_id);
|
|
|
|
mem = &session->mem;
|
|
|
|
if (nghttp2_stream_in_dep_tree(stream)) {
|
|
rv = nghttp2_stream_dep_remove(stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
nghttp2_map_remove(&session->streams, stream->stream_id);
|
|
nghttp2_stream_free(stream);
|
|
nghttp2_mem_free(mem, stream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_session_keep_closed_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
DEBUGF("stream: keep closed stream(%p)=%d, state=%d\n", stream,
|
|
stream->stream_id, stream->state);
|
|
|
|
if (session->closed_stream_tail) {
|
|
session->closed_stream_tail->closed_next = stream;
|
|
stream->closed_prev = session->closed_stream_tail;
|
|
} else {
|
|
session->closed_stream_head = stream;
|
|
}
|
|
session->closed_stream_tail = stream;
|
|
|
|
++session->num_closed_streams;
|
|
}
|
|
|
|
void nghttp2_session_keep_idle_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
DEBUGF("stream: keep idle stream(%p)=%d, state=%d\n", stream,
|
|
stream->stream_id, stream->state);
|
|
|
|
if (session->idle_stream_tail) {
|
|
session->idle_stream_tail->closed_next = stream;
|
|
stream->closed_prev = session->idle_stream_tail;
|
|
} else {
|
|
session->idle_stream_head = stream;
|
|
}
|
|
session->idle_stream_tail = stream;
|
|
|
|
++session->num_idle_streams;
|
|
}
|
|
|
|
void nghttp2_session_detach_idle_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
nghttp2_stream *prev_stream, *next_stream;
|
|
|
|
DEBUGF("stream: detach idle stream(%p)=%d, state=%d\n", stream,
|
|
stream->stream_id, stream->state);
|
|
|
|
prev_stream = stream->closed_prev;
|
|
next_stream = stream->closed_next;
|
|
|
|
if (prev_stream) {
|
|
prev_stream->closed_next = next_stream;
|
|
} else {
|
|
session->idle_stream_head = next_stream;
|
|
}
|
|
|
|
if (next_stream) {
|
|
next_stream->closed_prev = prev_stream;
|
|
} else {
|
|
session->idle_stream_tail = prev_stream;
|
|
}
|
|
|
|
stream->closed_prev = NULL;
|
|
stream->closed_next = NULL;
|
|
|
|
--session->num_idle_streams;
|
|
}
|
|
|
|
int nghttp2_session_adjust_closed_stream(nghttp2_session *session) {
|
|
size_t num_stream_max;
|
|
int rv;
|
|
|
|
if (session->local_settings.max_concurrent_streams ==
|
|
NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS) {
|
|
num_stream_max = session->pending_local_max_concurrent_stream;
|
|
} else {
|
|
num_stream_max = session->local_settings.max_concurrent_streams;
|
|
}
|
|
|
|
DEBUGF("stream: adjusting kept closed streams num_closed_streams=%zu, "
|
|
"num_incoming_streams=%zu, max_concurrent_streams=%zu\n",
|
|
session->num_closed_streams, session->num_incoming_streams,
|
|
num_stream_max);
|
|
|
|
while (session->num_closed_streams > 0 &&
|
|
session->num_closed_streams + session->num_incoming_streams >
|
|
num_stream_max) {
|
|
nghttp2_stream *head_stream;
|
|
nghttp2_stream *next;
|
|
|
|
head_stream = session->closed_stream_head;
|
|
|
|
assert(head_stream);
|
|
|
|
next = head_stream->closed_next;
|
|
|
|
rv = nghttp2_session_destroy_stream(session, head_stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
/* head_stream is now freed */
|
|
|
|
session->closed_stream_head = next;
|
|
|
|
if (session->closed_stream_head) {
|
|
session->closed_stream_head->closed_prev = NULL;
|
|
} else {
|
|
session->closed_stream_tail = NULL;
|
|
}
|
|
|
|
--session->num_closed_streams;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_adjust_idle_stream(nghttp2_session *session) {
|
|
size_t max;
|
|
int rv;
|
|
|
|
/* Make minimum number of idle streams 16, and maximum 100, which
|
|
are arbitrary chosen numbers. */
|
|
max = nghttp2_min(
|
|
100, nghttp2_max(
|
|
16, nghttp2_min(session->local_settings.max_concurrent_streams,
|
|
session->pending_local_max_concurrent_stream)));
|
|
|
|
DEBUGF("stream: adjusting kept idle streams num_idle_streams=%zu, max=%zu\n",
|
|
session->num_idle_streams, max);
|
|
|
|
while (session->num_idle_streams > max) {
|
|
nghttp2_stream *head;
|
|
nghttp2_stream *next;
|
|
|
|
head = session->idle_stream_head;
|
|
assert(head);
|
|
|
|
next = head->closed_next;
|
|
|
|
rv = nghttp2_session_destroy_stream(session, head);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
/* head is now destroyed */
|
|
|
|
session->idle_stream_head = next;
|
|
|
|
if (session->idle_stream_head) {
|
|
session->idle_stream_head->closed_prev = NULL;
|
|
} else {
|
|
session->idle_stream_tail = NULL;
|
|
}
|
|
|
|
--session->num_idle_streams;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Closes stream with stream ID |stream_id| if both transmission and
|
|
* reception of the stream were disallowed. The |error_code| indicates
|
|
* the reason of the closure.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_INVALID_ARGUMENT
|
|
* The stream is not found.
|
|
* NGHTTP2_ERR_CALLBACK_FAILURE
|
|
* The callback function failed.
|
|
*/
|
|
int nghttp2_session_close_stream_if_shut_rdwr(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
if ((stream->shut_flags & NGHTTP2_SHUT_RDWR) == NGHTTP2_SHUT_RDWR) {
|
|
return nghttp2_session_close_stream(session, stream->stream_id,
|
|
NGHTTP2_NO_ERROR);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns nonzero if local endpoint allows reception of new stream
|
|
* from remote.
|
|
*/
|
|
static int session_allow_incoming_new_stream(nghttp2_session *session) {
|
|
return (session->goaway_flags &
|
|
(NGHTTP2_GOAWAY_TERM_ON_SEND | NGHTTP2_GOAWAY_SENT)) == 0;
|
|
}
|
|
|
|
/*
|
|
* This function returns nonzero if session is closing.
|
|
*/
|
|
static int session_is_closing(nghttp2_session *session) {
|
|
return (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) != 0 ||
|
|
(nghttp2_session_want_read(session) == 0 &&
|
|
nghttp2_session_want_write(session) == 0);
|
|
}
|
|
|
|
/*
|
|
* Check that we can send a frame to the |stream|. This function
|
|
* returns 0 if we can send a frame to the |frame|, or one of the
|
|
* following negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed.
|
|
* NGHTTP2_ERR_STREAM_SHUT_WR
|
|
* The stream is half-closed for transmission.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
*/
|
|
static int session_predicate_for_stream_send(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
if (stream == NULL) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
if (stream->shut_flags & NGHTTP2_SHUT_WR) {
|
|
return NGHTTP2_ERR_STREAM_SHUT_WR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_check_request_allowed(nghttp2_session *session) {
|
|
return !session->server && session->next_stream_id <= INT32_MAX &&
|
|
(session->goaway_flags & NGHTTP2_GOAWAY_RECV) == 0 &&
|
|
!session_is_closing(session);
|
|
}
|
|
|
|
/*
|
|
* This function checks request HEADERS frame, which opens stream, can
|
|
* be sent at this time.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_START_STREAM_NOT_ALLOWED
|
|
* New stream cannot be created because of GOAWAY: session is
|
|
* going down or received last_stream_id is strictly less than
|
|
* frame->hd.stream_id.
|
|
* NGHTTP2_ERR_STREAM_CLOSING
|
|
* request HEADERS was canceled by RST_STREAM while it is in queue.
|
|
*/
|
|
static int session_predicate_request_headers_send(nghttp2_session *session,
|
|
nghttp2_outbound_item *item) {
|
|
if (item->aux_data.headers.canceled) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
/* If we are terminating session (NGHTTP2_GOAWAY_TERM_ON_SEND),
|
|
GOAWAY was received from peer, or session is about to close, new
|
|
request is not allowed. */
|
|
if ((session->goaway_flags & NGHTTP2_GOAWAY_RECV) ||
|
|
session_is_closing(session)) {
|
|
return NGHTTP2_ERR_START_STREAM_NOT_ALLOWED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS, which is the first frame from the
|
|
* server, with the |stream| can be sent at this time. The |stream|
|
|
* can be NULL.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed or does not exist.
|
|
* NGHTTP2_ERR_STREAM_SHUT_WR
|
|
* The transmission is not allowed for this stream (e.g., a frame
|
|
* with END_STREAM flag set has already sent)
|
|
* NGHTTP2_ERR_INVALID_STREAM_ID
|
|
* The stream ID is invalid.
|
|
* NGHTTP2_ERR_STREAM_CLOSING
|
|
* RST_STREAM was queued for this stream.
|
|
* NGHTTP2_ERR_INVALID_STREAM_STATE
|
|
* The state of the stream is not valid.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
* NGHTTP2_ERR_PROTO
|
|
* Client side attempted to send response.
|
|
*/
|
|
static int session_predicate_response_headers_send(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
rv = session_predicate_for_stream_send(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
assert(stream);
|
|
if (!session->server) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
if (nghttp2_session_is_my_stream_id(session, stream->stream_id)) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_ID;
|
|
}
|
|
switch (stream->state) {
|
|
case NGHTTP2_STREAM_OPENING:
|
|
return 0;
|
|
case NGHTTP2_STREAM_CLOSING:
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
default:
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS for reserved stream can be sent. The
|
|
* |stream| must be reserved state and the |session| is server side.
|
|
* The |stream| can be NULL.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* error codes:
|
|
*
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed.
|
|
* NGHTTP2_ERR_STREAM_SHUT_WR
|
|
* The stream is half-closed for transmission.
|
|
* NGHTTP2_ERR_PROTO
|
|
* The stream is not reserved state
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* RST_STREAM was queued for this stream.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
* NGHTTP2_ERR_START_STREAM_NOT_ALLOWED
|
|
* New stream cannot be created because GOAWAY is already sent or
|
|
* received.
|
|
* NGHTTP2_ERR_PROTO
|
|
* Client side attempted to send push response.
|
|
*/
|
|
static int
|
|
session_predicate_push_response_headers_send(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
/* TODO Should disallow HEADERS if GOAWAY has already been issued? */
|
|
rv = session_predicate_for_stream_send(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
assert(stream);
|
|
if (!session->server) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
if (stream->state != NGHTTP2_STREAM_RESERVED) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
if (session->goaway_flags & NGHTTP2_GOAWAY_RECV) {
|
|
return NGHTTP2_ERR_START_STREAM_NOT_ALLOWED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS, which is neither stream-opening nor
|
|
* first response header, with the |stream| can be sent at this time.
|
|
* The |stream| can be NULL.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed or does not exist.
|
|
* NGHTTP2_ERR_STREAM_SHUT_WR
|
|
* The transmission is not allowed for this stream (e.g., a frame
|
|
* with END_STREAM flag set has already sent)
|
|
* NGHTTP2_ERR_STREAM_CLOSING
|
|
* RST_STREAM was queued for this stream.
|
|
* NGHTTP2_ERR_INVALID_STREAM_STATE
|
|
* The state of the stream is not valid.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
*/
|
|
static int session_predicate_headers_send(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
rv = session_predicate_for_stream_send(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
assert(stream);
|
|
|
|
switch (stream->state) {
|
|
case NGHTTP2_STREAM_OPENED:
|
|
return 0;
|
|
case NGHTTP2_STREAM_CLOSING:
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
default:
|
|
if (nghttp2_session_is_my_stream_id(session, stream->stream_id)) {
|
|
return 0;
|
|
}
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function checks PUSH_PROMISE frame |frame| with the |stream|
|
|
* can be sent at this time. The |stream| can be NULL.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_START_STREAM_NOT_ALLOWED
|
|
* New stream cannot be created because GOAWAY is already sent or
|
|
* received.
|
|
* NGHTTP2_ERR_PROTO
|
|
* The client side attempts to send PUSH_PROMISE, or the server
|
|
* sends PUSH_PROMISE for the stream not initiated by the client.
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed or does not exist.
|
|
* NGHTTP2_ERR_STREAM_CLOSING
|
|
* RST_STREAM was queued for this stream.
|
|
* NGHTTP2_ERR_STREAM_SHUT_WR
|
|
* The transmission is not allowed for this stream (e.g., a frame
|
|
* with END_STREAM flag set has already sent)
|
|
* NGHTTP2_ERR_PUSH_DISABLED
|
|
* The remote peer disabled reception of PUSH_PROMISE.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
*/
|
|
static int session_predicate_push_promise_send(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
|
|
if (!session->server) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
|
|
rv = session_predicate_for_stream_send(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
assert(stream);
|
|
|
|
if (session->remote_settings.enable_push == 0) {
|
|
return NGHTTP2_ERR_PUSH_DISABLED;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
if (session->goaway_flags & NGHTTP2_GOAWAY_RECV) {
|
|
return NGHTTP2_ERR_START_STREAM_NOT_ALLOWED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks WINDOW_UPDATE with the stream ID |stream_id|
|
|
* can be sent at this time. Note that END_STREAM flag of the previous
|
|
* frame does not affect the transmission of the WINDOW_UPDATE frame.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed or does not exist.
|
|
* NGHTTP2_ERR_STREAM_CLOSING
|
|
* RST_STREAM was queued for this stream.
|
|
* NGHTTP2_ERR_INVALID_STREAM_STATE
|
|
* The state of the stream is not valid.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
*/
|
|
static int session_predicate_window_update_send(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
|
|
if (stream_id == 0) {
|
|
/* Connection-level window update */
|
|
return 0;
|
|
}
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
if (state_reserved_local(session, stream)) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_predicate_altsvc_send(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
|
|
if (stream_id == 0) {
|
|
return 0;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_predicate_origin_send(nghttp2_session *session) {
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_predicate_priority_update_send(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return 0;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
if (stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Take into account settings max frame size and both connection-level
|
|
flow control here */
|
|
static ssize_t
|
|
nghttp2_session_enforce_flow_control_limits(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
ssize_t requested_window_size) {
|
|
DEBUGF("send: remote windowsize connection=%d, remote maxframsize=%u, "
|
|
"stream(id %d)=%d\n",
|
|
session->remote_window_size, session->remote_settings.max_frame_size,
|
|
stream->stream_id, stream->remote_window_size);
|
|
|
|
return nghttp2_min(nghttp2_min(nghttp2_min(requested_window_size,
|
|
stream->remote_window_size),
|
|
session->remote_window_size),
|
|
(int32_t)session->remote_settings.max_frame_size);
|
|
}
|
|
|
|
/*
|
|
* Returns the maximum length of next data read. If the
|
|
* connection-level and/or stream-wise flow control are enabled, the
|
|
* return value takes into account those current window sizes. The remote
|
|
* settings for max frame size is also taken into account.
|
|
*/
|
|
static size_t nghttp2_session_next_data_read(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
ssize_t window_size;
|
|
|
|
window_size = nghttp2_session_enforce_flow_control_limits(
|
|
session, stream, NGHTTP2_DATA_PAYLOADLEN);
|
|
|
|
DEBUGF("send: available window=%zd\n", window_size);
|
|
|
|
return window_size > 0 ? (size_t)window_size : 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks DATA with the |stream| can be sent at this
|
|
* time. The |stream| can be NULL.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_STREAM_CLOSED
|
|
* The stream is already closed or does not exist.
|
|
* NGHTTP2_ERR_STREAM_SHUT_WR
|
|
* The transmission is not allowed for this stream (e.g., a frame
|
|
* with END_STREAM flag set has already sent)
|
|
* NGHTTP2_ERR_STREAM_CLOSING
|
|
* RST_STREAM was queued for this stream.
|
|
* NGHTTP2_ERR_INVALID_STREAM_STATE
|
|
* The state of the stream is not valid.
|
|
* NGHTTP2_ERR_SESSION_CLOSING
|
|
* This session is closing.
|
|
*/
|
|
static int nghttp2_session_predicate_data_send(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
rv = session_predicate_for_stream_send(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
assert(stream);
|
|
if (nghttp2_session_is_my_stream_id(session, stream->stream_id)) {
|
|
/* Request body data */
|
|
/* If stream->state is NGHTTP2_STREAM_CLOSING, RST_STREAM was
|
|
queued but not yet sent. In this case, we won't send DATA
|
|
frames. */
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
return 0;
|
|
}
|
|
/* Response body data */
|
|
if (stream->state == NGHTTP2_STREAM_OPENED) {
|
|
return 0;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
|
|
static ssize_t session_call_select_padding(nghttp2_session *session,
|
|
const nghttp2_frame *frame,
|
|
size_t max_payloadlen) {
|
|
ssize_t rv;
|
|
|
|
if (frame->hd.length >= max_payloadlen) {
|
|
return (ssize_t)frame->hd.length;
|
|
}
|
|
|
|
if (session->callbacks.select_padding_callback) {
|
|
size_t max_paddedlen;
|
|
|
|
max_paddedlen =
|
|
nghttp2_min(frame->hd.length + NGHTTP2_MAX_PADLEN, max_payloadlen);
|
|
|
|
rv = session->callbacks.select_padding_callback(
|
|
session, frame, max_paddedlen, session->user_data);
|
|
if (rv < (ssize_t)frame->hd.length || rv > (ssize_t)max_paddedlen) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
return rv;
|
|
}
|
|
return (ssize_t)frame->hd.length;
|
|
}
|
|
|
|
/* Add padding to HEADERS or PUSH_PROMISE. We use
|
|
frame->headers.padlen in this function to use the fact that
|
|
frame->push_promise has also padlen in the same position. */
|
|
static int session_headers_add_pad(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
ssize_t padded_payloadlen;
|
|
nghttp2_active_outbound_item *aob;
|
|
nghttp2_bufs *framebufs;
|
|
size_t padlen;
|
|
size_t max_payloadlen;
|
|
|
|
aob = &session->aob;
|
|
framebufs = &aob->framebufs;
|
|
|
|
max_payloadlen = nghttp2_min(NGHTTP2_MAX_PAYLOADLEN,
|
|
frame->hd.length + NGHTTP2_MAX_PADLEN);
|
|
|
|
padded_payloadlen =
|
|
session_call_select_padding(session, frame, max_payloadlen);
|
|
|
|
if (nghttp2_is_fatal((int)padded_payloadlen)) {
|
|
return (int)padded_payloadlen;
|
|
}
|
|
|
|
padlen = (size_t)padded_payloadlen - frame->hd.length;
|
|
|
|
DEBUGF("send: padding selected: payloadlen=%zd, padlen=%zu\n",
|
|
padded_payloadlen, padlen);
|
|
|
|
rv = nghttp2_frame_add_pad(framebufs, &frame->hd, padlen, 0);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
frame->headers.padlen = padlen;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static size_t session_estimate_headers_payload(nghttp2_session *session,
|
|
const nghttp2_nv *nva,
|
|
size_t nvlen,
|
|
size_t additional) {
|
|
return nghttp2_hd_deflate_bound(&session->hd_deflater, nva, nvlen) +
|
|
additional;
|
|
}
|
|
|
|
static int session_pack_extension(nghttp2_session *session, nghttp2_bufs *bufs,
|
|
nghttp2_frame *frame) {
|
|
ssize_t rv;
|
|
nghttp2_buf *buf;
|
|
size_t buflen;
|
|
size_t framelen;
|
|
|
|
assert(session->callbacks.pack_extension_callback);
|
|
|
|
buf = &bufs->head->buf;
|
|
buflen = nghttp2_min(nghttp2_buf_avail(buf), NGHTTP2_MAX_PAYLOADLEN);
|
|
|
|
rv = session->callbacks.pack_extension_callback(session, buf->last, buflen,
|
|
frame, session->user_data);
|
|
if (rv == NGHTTP2_ERR_CANCEL) {
|
|
return (int)rv;
|
|
}
|
|
|
|
if (rv < 0 || (size_t)rv > buflen) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
framelen = (size_t)rv;
|
|
|
|
frame->hd.length = framelen;
|
|
|
|
assert(buf->pos == buf->last);
|
|
buf->last += framelen;
|
|
buf->pos -= NGHTTP2_FRAME_HDLEN;
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function serializes frame for transmission.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of negative error
|
|
* codes, including both fatal and non-fatal ones.
|
|
*/
|
|
static int session_prep_frame(nghttp2_session *session,
|
|
nghttp2_outbound_item *item) {
|
|
int rv;
|
|
nghttp2_frame *frame;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
frame = &item->frame;
|
|
|
|
switch (frame->hd.type) {
|
|
case NGHTTP2_DATA: {
|
|
size_t next_readmax;
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
if (stream) {
|
|
assert(stream->item == item);
|
|
}
|
|
|
|
rv = nghttp2_session_predicate_data_send(session, stream);
|
|
if (rv != 0) {
|
|
// If stream was already closed, nghttp2_session_get_stream()
|
|
// returns NULL, but item is still attached to the stream.
|
|
// Search stream including closed again.
|
|
stream = nghttp2_session_get_stream_raw(session, frame->hd.stream_id);
|
|
if (stream) {
|
|
int rv2;
|
|
|
|
rv2 = session_detach_stream_item(session, stream);
|
|
|
|
if (nghttp2_is_fatal(rv2)) {
|
|
return rv2;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
/* Assuming stream is not NULL */
|
|
assert(stream);
|
|
next_readmax = nghttp2_session_next_data_read(session, stream);
|
|
|
|
if (next_readmax == 0) {
|
|
|
|
/* This must be true since we only pop DATA frame item from
|
|
queue when session->remote_window_size > 0 */
|
|
assert(session->remote_window_size > 0);
|
|
|
|
rv = session_defer_stream_item(session, stream,
|
|
NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session->aob.item = NULL;
|
|
active_outbound_item_reset(&session->aob, mem);
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
}
|
|
|
|
rv = nghttp2_session_pack_data(session, &session->aob.framebufs,
|
|
next_readmax, frame, &item->aux_data.data,
|
|
stream);
|
|
if (rv == NGHTTP2_ERR_PAUSE) {
|
|
return rv;
|
|
}
|
|
if (rv == NGHTTP2_ERR_DEFERRED) {
|
|
rv = session_defer_stream_item(session, stream,
|
|
NGHTTP2_STREAM_FLAG_DEFERRED_USER);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session->aob.item = NULL;
|
|
active_outbound_item_reset(&session->aob, mem);
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
}
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = session_detach_stream_item(session, stream);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_session_add_rst_stream(session, frame->hd.stream_id,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
|
|
}
|
|
if (rv != 0) {
|
|
int rv2;
|
|
|
|
rv2 = session_detach_stream_item(session, stream);
|
|
|
|
if (nghttp2_is_fatal(rv2)) {
|
|
return rv2;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
case NGHTTP2_HEADERS: {
|
|
nghttp2_headers_aux_data *aux_data;
|
|
size_t estimated_payloadlen;
|
|
|
|
aux_data = &item->aux_data.headers;
|
|
|
|
if (frame->headers.cat == NGHTTP2_HCAT_REQUEST) {
|
|
/* initial HEADERS, which opens stream */
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_open_stream(
|
|
session, frame->hd.stream_id, NGHTTP2_STREAM_FLAG_NONE,
|
|
&frame->headers.pri_spec, NGHTTP2_STREAM_INITIAL,
|
|
aux_data->stream_user_data);
|
|
|
|
if (stream == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
/* We don't call nghttp2_session_adjust_closed_stream() here,
|
|
since we don't keep closed stream in client side */
|
|
|
|
rv = session_predicate_request_headers_send(session, item);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if (session_enforce_http_messaging(session)) {
|
|
nghttp2_http_record_request_method(stream, frame);
|
|
}
|
|
} else {
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
if (stream && stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
rv = session_predicate_push_response_headers_send(session, stream);
|
|
if (rv == 0) {
|
|
frame->headers.cat = NGHTTP2_HCAT_PUSH_RESPONSE;
|
|
|
|
if (aux_data->stream_user_data) {
|
|
stream->stream_user_data = aux_data->stream_user_data;
|
|
}
|
|
}
|
|
} else if (session_predicate_response_headers_send(session, stream) ==
|
|
0) {
|
|
frame->headers.cat = NGHTTP2_HCAT_RESPONSE;
|
|
rv = 0;
|
|
} else {
|
|
frame->headers.cat = NGHTTP2_HCAT_HEADERS;
|
|
|
|
rv = session_predicate_headers_send(session, stream);
|
|
}
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
estimated_payloadlen = session_estimate_headers_payload(
|
|
session, frame->headers.nva, frame->headers.nvlen,
|
|
NGHTTP2_PRIORITY_SPECLEN);
|
|
|
|
if (estimated_payloadlen > session->max_send_header_block_length) {
|
|
return NGHTTP2_ERR_FRAME_SIZE_ERROR;
|
|
}
|
|
|
|
rv = nghttp2_frame_pack_headers(&session->aob.framebufs, &frame->headers,
|
|
&session->hd_deflater);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
DEBUGF("send: before padding, HEADERS serialized in %zd bytes\n",
|
|
nghttp2_bufs_len(&session->aob.framebufs));
|
|
|
|
rv = session_headers_add_pad(session, frame);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
DEBUGF("send: HEADERS finally serialized in %zd bytes\n",
|
|
nghttp2_bufs_len(&session->aob.framebufs));
|
|
|
|
if (frame->headers.cat == NGHTTP2_HCAT_REQUEST) {
|
|
assert(session->last_sent_stream_id < frame->hd.stream_id);
|
|
session->last_sent_stream_id = frame->hd.stream_id;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_PRIORITY: {
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
/* PRIORITY frame can be sent at any time and to any stream
|
|
ID. */
|
|
nghttp2_frame_pack_priority(&session->aob.framebufs, &frame->priority);
|
|
|
|
/* Peer can send PRIORITY frame against idle stream to create
|
|
"anchor" in dependency tree. Only client can do this in
|
|
nghttp2. In nghttp2, only server retains non-active (closed
|
|
or idle) streams in memory, so we don't open stream here. */
|
|
return 0;
|
|
}
|
|
case NGHTTP2_RST_STREAM:
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
nghttp2_frame_pack_rst_stream(&session->aob.framebufs, &frame->rst_stream);
|
|
return 0;
|
|
case NGHTTP2_SETTINGS: {
|
|
if (frame->hd.flags & NGHTTP2_FLAG_ACK) {
|
|
assert(session->obq_flood_counter_ > 0);
|
|
--session->obq_flood_counter_;
|
|
/* When session is about to close, don't send SETTINGS ACK.
|
|
We are required to send SETTINGS without ACK though; for
|
|
example, we have to send SETTINGS as a part of connection
|
|
preface. */
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
}
|
|
|
|
rv = nghttp2_frame_pack_settings(&session->aob.framebufs, &frame->settings);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
case NGHTTP2_PUSH_PROMISE: {
|
|
nghttp2_stream *stream;
|
|
size_t estimated_payloadlen;
|
|
|
|
/* stream could be NULL if associated stream was already
|
|
closed. */
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
/* predicate should fail if stream is NULL. */
|
|
rv = session_predicate_push_promise_send(session, stream);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
assert(stream);
|
|
|
|
estimated_payloadlen = session_estimate_headers_payload(
|
|
session, frame->push_promise.nva, frame->push_promise.nvlen, 0);
|
|
|
|
if (estimated_payloadlen > session->max_send_header_block_length) {
|
|
return NGHTTP2_ERR_FRAME_SIZE_ERROR;
|
|
}
|
|
|
|
rv = nghttp2_frame_pack_push_promise(
|
|
&session->aob.framebufs, &frame->push_promise, &session->hd_deflater);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
rv = session_headers_add_pad(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
assert(session->last_sent_stream_id + 2 <=
|
|
frame->push_promise.promised_stream_id);
|
|
session->last_sent_stream_id = frame->push_promise.promised_stream_id;
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_PING:
|
|
if (frame->hd.flags & NGHTTP2_FLAG_ACK) {
|
|
assert(session->obq_flood_counter_ > 0);
|
|
--session->obq_flood_counter_;
|
|
}
|
|
/* PING frame is allowed to be sent unless termination GOAWAY is
|
|
sent */
|
|
if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
nghttp2_frame_pack_ping(&session->aob.framebufs, &frame->ping);
|
|
return 0;
|
|
case NGHTTP2_GOAWAY:
|
|
rv = nghttp2_frame_pack_goaway(&session->aob.framebufs, &frame->goaway);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
session->local_last_stream_id = frame->goaway.last_stream_id;
|
|
|
|
return 0;
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
rv = session_predicate_window_update_send(session, frame->hd.stream_id);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
nghttp2_frame_pack_window_update(&session->aob.framebufs,
|
|
&frame->window_update);
|
|
return 0;
|
|
case NGHTTP2_CONTINUATION:
|
|
/* We never handle CONTINUATION here. */
|
|
assert(0);
|
|
return 0;
|
|
default: {
|
|
nghttp2_ext_aux_data *aux_data;
|
|
|
|
/* extension frame */
|
|
|
|
aux_data = &item->aux_data.ext;
|
|
|
|
if (aux_data->builtin == 0) {
|
|
if (session_is_closing(session)) {
|
|
return NGHTTP2_ERR_SESSION_CLOSING;
|
|
}
|
|
|
|
return session_pack_extension(session, &session->aob.framebufs, frame);
|
|
}
|
|
|
|
switch (frame->hd.type) {
|
|
case NGHTTP2_ALTSVC:
|
|
rv = session_predicate_altsvc_send(session, frame->hd.stream_id);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
nghttp2_frame_pack_altsvc(&session->aob.framebufs, &frame->ext);
|
|
|
|
return 0;
|
|
case NGHTTP2_ORIGIN:
|
|
rv = session_predicate_origin_send(session);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_frame_pack_origin(&session->aob.framebufs, &frame->ext);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
case NGHTTP2_PRIORITY_UPDATE: {
|
|
nghttp2_ext_priority_update *priority_update = frame->ext.payload;
|
|
rv = session_predicate_priority_update_send(session,
|
|
priority_update->stream_id);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
nghttp2_frame_pack_priority_update(&session->aob.framebufs, &frame->ext);
|
|
|
|
return 0;
|
|
}
|
|
default:
|
|
/* Unreachable here */
|
|
assert(0);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nghttp2_outbound_item *
|
|
nghttp2_session_get_next_ob_item(nghttp2_session *session) {
|
|
nghttp2_outbound_item *item;
|
|
|
|
if (nghttp2_outbound_queue_top(&session->ob_urgent)) {
|
|
return nghttp2_outbound_queue_top(&session->ob_urgent);
|
|
}
|
|
|
|
if (nghttp2_outbound_queue_top(&session->ob_reg)) {
|
|
return nghttp2_outbound_queue_top(&session->ob_reg);
|
|
}
|
|
|
|
if (!session_is_outgoing_concurrent_streams_max(session)) {
|
|
if (nghttp2_outbound_queue_top(&session->ob_syn)) {
|
|
return nghttp2_outbound_queue_top(&session->ob_syn);
|
|
}
|
|
}
|
|
|
|
if (session->remote_window_size > 0) {
|
|
item = nghttp2_stream_next_outbound_item(&session->root);
|
|
if (item) {
|
|
return item;
|
|
}
|
|
|
|
return session_sched_get_next_outbound_item(session);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
nghttp2_outbound_item *
|
|
nghttp2_session_pop_next_ob_item(nghttp2_session *session) {
|
|
nghttp2_outbound_item *item;
|
|
|
|
item = nghttp2_outbound_queue_top(&session->ob_urgent);
|
|
if (item) {
|
|
nghttp2_outbound_queue_pop(&session->ob_urgent);
|
|
item->queued = 0;
|
|
return item;
|
|
}
|
|
|
|
item = nghttp2_outbound_queue_top(&session->ob_reg);
|
|
if (item) {
|
|
nghttp2_outbound_queue_pop(&session->ob_reg);
|
|
item->queued = 0;
|
|
return item;
|
|
}
|
|
|
|
if (!session_is_outgoing_concurrent_streams_max(session)) {
|
|
item = nghttp2_outbound_queue_top(&session->ob_syn);
|
|
if (item) {
|
|
nghttp2_outbound_queue_pop(&session->ob_syn);
|
|
item->queued = 0;
|
|
return item;
|
|
}
|
|
}
|
|
|
|
if (session->remote_window_size > 0) {
|
|
item = nghttp2_stream_next_outbound_item(&session->root);
|
|
if (item) {
|
|
return item;
|
|
}
|
|
|
|
return session_sched_get_next_outbound_item(session);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int session_call_before_frame_send(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
if (session->callbacks.before_frame_send_callback) {
|
|
rv = session->callbacks.before_frame_send_callback(session, frame,
|
|
session->user_data);
|
|
if (rv == NGHTTP2_ERR_CANCEL) {
|
|
return rv;
|
|
}
|
|
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_on_frame_send(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
if (session->callbacks.on_frame_send_callback) {
|
|
rv = session->callbacks.on_frame_send_callback(session, frame,
|
|
session->user_data);
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int find_stream_on_goaway_func(void *entry, void *ptr) {
|
|
nghttp2_close_stream_on_goaway_arg *arg;
|
|
nghttp2_stream *stream;
|
|
|
|
arg = (nghttp2_close_stream_on_goaway_arg *)ptr;
|
|
stream = (nghttp2_stream *)entry;
|
|
|
|
if (nghttp2_session_is_my_stream_id(arg->session, stream->stream_id)) {
|
|
if (arg->incoming) {
|
|
return 0;
|
|
}
|
|
} else if (!arg->incoming) {
|
|
return 0;
|
|
}
|
|
|
|
if (stream->state != NGHTTP2_STREAM_IDLE &&
|
|
(stream->flags & NGHTTP2_STREAM_FLAG_CLOSED) == 0 &&
|
|
stream->stream_id > arg->last_stream_id) {
|
|
/* We are collecting streams to close because we cannot call
|
|
nghttp2_session_close_stream() inside nghttp2_map_each().
|
|
Reuse closed_next member.. bad choice? */
|
|
assert(stream->closed_next == NULL);
|
|
assert(stream->closed_prev == NULL);
|
|
|
|
if (arg->head) {
|
|
stream->closed_next = arg->head;
|
|
arg->head = stream;
|
|
} else {
|
|
arg->head = stream;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Closes non-idle and non-closed streams whose stream ID >
|
|
last_stream_id. If incoming is nonzero, we are going to close
|
|
incoming streams. Otherwise, close outgoing streams. */
|
|
static int session_close_stream_on_goaway(nghttp2_session *session,
|
|
int32_t last_stream_id,
|
|
int incoming) {
|
|
int rv;
|
|
nghttp2_stream *stream, *next_stream;
|
|
nghttp2_close_stream_on_goaway_arg arg = {session, NULL, last_stream_id,
|
|
incoming};
|
|
|
|
rv = nghttp2_map_each(&session->streams, find_stream_on_goaway_func, &arg);
|
|
assert(rv == 0);
|
|
|
|
stream = arg.head;
|
|
while (stream) {
|
|
next_stream = stream->closed_next;
|
|
stream->closed_next = NULL;
|
|
rv = nghttp2_session_close_stream(session, stream->stream_id,
|
|
NGHTTP2_REFUSED_STREAM);
|
|
|
|
/* stream may be deleted here */
|
|
|
|
stream = next_stream;
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
/* Clean up closed_next member just in case */
|
|
while (stream) {
|
|
next_stream = stream->closed_next;
|
|
stream->closed_next = NULL;
|
|
stream = next_stream;
|
|
}
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void session_reschedule_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream) {
|
|
stream->last_writelen = stream->item->frame.hd.length;
|
|
|
|
if (!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES)) {
|
|
nghttp2_stream_reschedule(stream);
|
|
return;
|
|
}
|
|
|
|
if (!session->server) {
|
|
return;
|
|
}
|
|
|
|
session_sched_reschedule_stream(session, stream);
|
|
}
|
|
|
|
static int session_update_stream_consumed_size(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
size_t delta_size);
|
|
|
|
static int session_update_connection_consumed_size(nghttp2_session *session,
|
|
size_t delta_size);
|
|
|
|
/*
|
|
* Called after a frame is sent. This function runs
|
|
* on_frame_send_callback and handles stream closure upon END_STREAM
|
|
* or RST_STREAM. This function does not reset session->aob. It is a
|
|
* responsibility of session_after_frame_sent2.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
* NGHTTP2_ERR_CALLBACK_FAILURE
|
|
* The callback function failed.
|
|
*/
|
|
static int session_after_frame_sent1(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_active_outbound_item *aob = &session->aob;
|
|
nghttp2_outbound_item *item = aob->item;
|
|
nghttp2_bufs *framebufs = &aob->framebufs;
|
|
nghttp2_frame *frame;
|
|
nghttp2_stream *stream;
|
|
|
|
frame = &item->frame;
|
|
|
|
if (frame->hd.type == NGHTTP2_DATA) {
|
|
nghttp2_data_aux_data *aux_data;
|
|
|
|
aux_data = &item->aux_data.data;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
/* We update flow control window after a frame was completely
|
|
sent. This is possible because we choose payload length not to
|
|
exceed the window */
|
|
session->remote_window_size -= (int32_t)frame->hd.length;
|
|
if (stream) {
|
|
stream->remote_window_size -= (int32_t)frame->hd.length;
|
|
}
|
|
|
|
if (stream && aux_data->eof) {
|
|
rv = session_detach_stream_item(session, stream);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
/* Call on_frame_send_callback after
|
|
nghttp2_stream_detach_item(), so that application can issue
|
|
nghttp2_submit_data() in the callback. */
|
|
if (session->callbacks.on_frame_send_callback) {
|
|
rv = session_call_on_frame_send(session, frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
int stream_closed;
|
|
|
|
stream_closed =
|
|
(stream->shut_flags & NGHTTP2_SHUT_RDWR) == NGHTTP2_SHUT_RDWR;
|
|
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
|
|
|
|
rv = nghttp2_session_close_stream_if_shut_rdwr(session, stream);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
/* stream may be NULL if it was closed */
|
|
if (stream_closed) {
|
|
stream = NULL;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (session->callbacks.on_frame_send_callback) {
|
|
rv = session_call_on_frame_send(session, frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* non-DATA frame */
|
|
|
|
if (frame->hd.type == NGHTTP2_HEADERS ||
|
|
frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
|
if (nghttp2_bufs_next_present(framebufs)) {
|
|
DEBUGF("send: CONTINUATION exists, just return\n");
|
|
return 0;
|
|
}
|
|
}
|
|
rv = session_call_on_frame_send(session, frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
switch (frame->hd.type) {
|
|
case NGHTTP2_HEADERS: {
|
|
nghttp2_headers_aux_data *aux_data;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream) {
|
|
return 0;
|
|
}
|
|
|
|
switch (frame->headers.cat) {
|
|
case NGHTTP2_HCAT_REQUEST: {
|
|
stream->state = NGHTTP2_STREAM_OPENING;
|
|
if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
|
|
}
|
|
rv = nghttp2_session_close_stream_if_shut_rdwr(session, stream);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
/* We assume aux_data is a pointer to nghttp2_headers_aux_data */
|
|
aux_data = &item->aux_data.headers;
|
|
if (aux_data->data_prd.read_callback) {
|
|
/* nghttp2_submit_data() makes a copy of aux_data->data_prd */
|
|
rv = nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM,
|
|
frame->hd.stream_id, &aux_data->data_prd);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
/* TODO nghttp2_submit_data() may fail if stream has already
|
|
DATA frame item. We might have to handle it here. */
|
|
}
|
|
return 0;
|
|
}
|
|
case NGHTTP2_HCAT_PUSH_RESPONSE:
|
|
stream->flags = (uint8_t)(stream->flags & ~NGHTTP2_STREAM_FLAG_PUSH);
|
|
++session->num_outgoing_streams;
|
|
/* Fall through */
|
|
case NGHTTP2_HCAT_RESPONSE:
|
|
stream->state = NGHTTP2_STREAM_OPENED;
|
|
/* Fall through */
|
|
case NGHTTP2_HCAT_HEADERS:
|
|
if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
|
|
}
|
|
rv = nghttp2_session_close_stream_if_shut_rdwr(session, stream);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
/* We assume aux_data is a pointer to nghttp2_headers_aux_data */
|
|
aux_data = &item->aux_data.headers;
|
|
if (aux_data->data_prd.read_callback) {
|
|
rv = nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM,
|
|
frame->hd.stream_id, &aux_data->data_prd);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
/* TODO nghttp2_submit_data() may fail if stream has already
|
|
DATA frame item. We might have to handle it here. */
|
|
}
|
|
return 0;
|
|
default:
|
|
/* Unreachable */
|
|
assert(0);
|
|
return 0;
|
|
}
|
|
}
|
|
case NGHTTP2_PRIORITY:
|
|
if (session->server || session->pending_no_rfc7540_priorities == 1) {
|
|
return 0;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream_raw(session, frame->hd.stream_id);
|
|
|
|
if (!stream) {
|
|
if (!session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return 0;
|
|
}
|
|
|
|
stream = nghttp2_session_open_stream(
|
|
session, frame->hd.stream_id, NGHTTP2_FLAG_NONE,
|
|
&frame->priority.pri_spec, NGHTTP2_STREAM_IDLE, NULL);
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else {
|
|
rv = nghttp2_session_reprioritize_stream(session, stream,
|
|
&frame->priority.pri_spec);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
rv = nghttp2_session_adjust_idle_stream(session);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
case NGHTTP2_RST_STREAM:
|
|
rv = nghttp2_session_close_stream(session, frame->hd.stream_id,
|
|
frame->rst_stream.error_code);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
case NGHTTP2_GOAWAY: {
|
|
nghttp2_goaway_aux_data *aux_data;
|
|
|
|
aux_data = &item->aux_data.goaway;
|
|
|
|
if ((aux_data->flags & NGHTTP2_GOAWAY_AUX_SHUTDOWN_NOTICE) == 0) {
|
|
|
|
if (aux_data->flags & NGHTTP2_GOAWAY_AUX_TERM_ON_SEND) {
|
|
session->goaway_flags |= NGHTTP2_GOAWAY_TERM_SENT;
|
|
}
|
|
|
|
session->goaway_flags |= NGHTTP2_GOAWAY_SENT;
|
|
|
|
rv = session_close_stream_on_goaway(session, frame->goaway.last_stream_id,
|
|
1);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
if (frame->hd.stream_id == 0) {
|
|
session->window_update_queued = 0;
|
|
if (session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) {
|
|
rv = session_update_connection_consumed_size(session, 0);
|
|
} else {
|
|
rv = nghttp2_session_update_recv_connection_window_size(session, 0);
|
|
}
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream) {
|
|
return 0;
|
|
}
|
|
|
|
stream->window_update_queued = 0;
|
|
|
|
/* We don't have to send WINDOW_UPDATE if END_STREAM from peer
|
|
is seen. */
|
|
if (stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
return 0;
|
|
}
|
|
|
|
if (session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) {
|
|
rv = session_update_stream_consumed_size(session, stream, 0);
|
|
} else {
|
|
rv =
|
|
nghttp2_session_update_recv_stream_window_size(session, stream, 0, 1);
|
|
}
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called after a frame is sent and session_after_frame_sent1. This
|
|
* function is responsible to reset session->aob.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
* NGHTTP2_ERR_CALLBACK_FAILURE
|
|
* The callback function failed.
|
|
*/
|
|
static int session_after_frame_sent2(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_active_outbound_item *aob = &session->aob;
|
|
nghttp2_outbound_item *item = aob->item;
|
|
nghttp2_bufs *framebufs = &aob->framebufs;
|
|
nghttp2_frame *frame;
|
|
nghttp2_mem *mem;
|
|
nghttp2_stream *stream;
|
|
nghttp2_data_aux_data *aux_data;
|
|
|
|
mem = &session->mem;
|
|
frame = &item->frame;
|
|
|
|
if (frame->hd.type != NGHTTP2_DATA) {
|
|
|
|
if (frame->hd.type == NGHTTP2_HEADERS ||
|
|
frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
|
|
|
if (nghttp2_bufs_next_present(framebufs)) {
|
|
framebufs->cur = framebufs->cur->next;
|
|
|
|
DEBUGF("send: next CONTINUATION frame, %zu bytes\n",
|
|
nghttp2_buf_len(&framebufs->cur->buf));
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
active_outbound_item_reset(&session->aob, mem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* DATA frame */
|
|
|
|
aux_data = &item->aux_data.data;
|
|
|
|
/* On EOF, we have already detached data. Please note that
|
|
application may issue nghttp2_submit_data() in
|
|
on_frame_send_callback (call from session_after_frame_sent1),
|
|
which attach data to stream. We don't want to detach it. */
|
|
if (aux_data->eof) {
|
|
active_outbound_item_reset(aob, mem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Reset no_copy here because next write may not use this. */
|
|
aux_data->no_copy = 0;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
/* If session is closed or RST_STREAM was queued, we won't send
|
|
further data. */
|
|
if (nghttp2_session_predicate_data_send(session, stream) != 0) {
|
|
if (stream) {
|
|
rv = session_detach_stream_item(session, stream);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
active_outbound_item_reset(aob, mem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
aob->item = NULL;
|
|
active_outbound_item_reset(&session->aob, mem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_send_data(nghttp2_session *session,
|
|
nghttp2_outbound_item *item,
|
|
nghttp2_bufs *framebufs) {
|
|
int rv;
|
|
nghttp2_buf *buf;
|
|
size_t length;
|
|
nghttp2_frame *frame;
|
|
nghttp2_data_aux_data *aux_data;
|
|
|
|
buf = &framebufs->cur->buf;
|
|
frame = &item->frame;
|
|
length = frame->hd.length - frame->data.padlen;
|
|
aux_data = &item->aux_data.data;
|
|
|
|
rv = session->callbacks.send_data_callback(session, frame, buf->pos, length,
|
|
&aux_data->data_prd.source,
|
|
session->user_data);
|
|
|
|
switch (rv) {
|
|
case 0:
|
|
case NGHTTP2_ERR_WOULDBLOCK:
|
|
case NGHTTP2_ERR_PAUSE:
|
|
case NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE:
|
|
return rv;
|
|
default:
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
|
|
static ssize_t nghttp2_session_mem_send_internal(nghttp2_session *session,
|
|
const uint8_t **data_ptr,
|
|
int fast_cb) {
|
|
int rv;
|
|
nghttp2_active_outbound_item *aob;
|
|
nghttp2_bufs *framebufs;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
aob = &session->aob;
|
|
framebufs = &aob->framebufs;
|
|
|
|
/* We may have idle streams more than we expect (e.g.,
|
|
nghttp2_session_change_stream_priority() or
|
|
nghttp2_session_create_idle_stream()). Adjust them here. */
|
|
rv = nghttp2_session_adjust_idle_stream(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
for (;;) {
|
|
switch (aob->state) {
|
|
case NGHTTP2_OB_POP_ITEM: {
|
|
nghttp2_outbound_item *item;
|
|
|
|
item = nghttp2_session_pop_next_ob_item(session);
|
|
if (item == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
rv = session_prep_frame(session, item);
|
|
if (rv == NGHTTP2_ERR_PAUSE) {
|
|
return 0;
|
|
}
|
|
if (rv == NGHTTP2_ERR_DEFERRED) {
|
|
DEBUGF("send: frame transmission deferred\n");
|
|
break;
|
|
}
|
|
if (rv < 0) {
|
|
int32_t opened_stream_id = 0;
|
|
uint32_t error_code = NGHTTP2_INTERNAL_ERROR;
|
|
|
|
DEBUGF("send: frame preparation failed with %s\n",
|
|
nghttp2_strerror(rv));
|
|
/* TODO If the error comes from compressor, the connection
|
|
must be closed. */
|
|
if (item->frame.hd.type != NGHTTP2_DATA &&
|
|
session->callbacks.on_frame_not_send_callback && is_non_fatal(rv)) {
|
|
nghttp2_frame *frame = &item->frame;
|
|
/* The library is responsible for the transmission of
|
|
WINDOW_UPDATE frame, so we don't call error callback for
|
|
it. */
|
|
if (frame->hd.type != NGHTTP2_WINDOW_UPDATE &&
|
|
session->callbacks.on_frame_not_send_callback(
|
|
session, frame, rv, session->user_data) != 0) {
|
|
|
|
nghttp2_outbound_item_free(item, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
/* We have to close stream opened by failed request HEADERS
|
|
or PUSH_PROMISE. */
|
|
switch (item->frame.hd.type) {
|
|
case NGHTTP2_HEADERS:
|
|
if (item->frame.headers.cat == NGHTTP2_HCAT_REQUEST) {
|
|
opened_stream_id = item->frame.hd.stream_id;
|
|
if (item->aux_data.headers.canceled) {
|
|
error_code = item->aux_data.headers.error_code;
|
|
} else {
|
|
/* Set error_code to REFUSED_STREAM so that application
|
|
can send request again. */
|
|
error_code = NGHTTP2_REFUSED_STREAM;
|
|
}
|
|
}
|
|
break;
|
|
case NGHTTP2_PUSH_PROMISE:
|
|
opened_stream_id = item->frame.push_promise.promised_stream_id;
|
|
break;
|
|
}
|
|
if (opened_stream_id) {
|
|
/* careful not to override rv */
|
|
int rv2;
|
|
rv2 = nghttp2_session_close_stream(session, opened_stream_id,
|
|
error_code);
|
|
|
|
if (nghttp2_is_fatal(rv2)) {
|
|
return rv2;
|
|
}
|
|
}
|
|
|
|
nghttp2_outbound_item_free(item, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
active_outbound_item_reset(aob, mem);
|
|
|
|
if (rv == NGHTTP2_ERR_HEADER_COMP) {
|
|
/* If header compression error occurred, should terminiate
|
|
connection. */
|
|
rv = nghttp2_session_terminate_session(session,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
break;
|
|
}
|
|
|
|
aob->item = item;
|
|
|
|
nghttp2_bufs_rewind(framebufs);
|
|
|
|
if (item->frame.hd.type != NGHTTP2_DATA) {
|
|
nghttp2_frame *frame;
|
|
|
|
frame = &item->frame;
|
|
|
|
DEBUGF("send: next frame: payloadlen=%zu, type=%u, flags=0x%02x, "
|
|
"stream_id=%d\n",
|
|
frame->hd.length, frame->hd.type, frame->hd.flags,
|
|
frame->hd.stream_id);
|
|
|
|
rv = session_call_before_frame_send(session, frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_CANCEL) {
|
|
int32_t opened_stream_id = 0;
|
|
uint32_t error_code = NGHTTP2_INTERNAL_ERROR;
|
|
|
|
if (session->callbacks.on_frame_not_send_callback) {
|
|
if (session->callbacks.on_frame_not_send_callback(
|
|
session, frame, rv, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
|
|
/* We have to close stream opened by canceled request
|
|
HEADERS or PUSH_PROMISE. */
|
|
switch (item->frame.hd.type) {
|
|
case NGHTTP2_HEADERS:
|
|
if (item->frame.headers.cat == NGHTTP2_HCAT_REQUEST) {
|
|
opened_stream_id = item->frame.hd.stream_id;
|
|
/* We don't have to check
|
|
item->aux_data.headers.canceled since it has already
|
|
been checked. */
|
|
/* Set error_code to REFUSED_STREAM so that application
|
|
can send request again. */
|
|
error_code = NGHTTP2_REFUSED_STREAM;
|
|
}
|
|
break;
|
|
case NGHTTP2_PUSH_PROMISE:
|
|
opened_stream_id = item->frame.push_promise.promised_stream_id;
|
|
break;
|
|
}
|
|
if (opened_stream_id) {
|
|
/* careful not to override rv */
|
|
int rv2;
|
|
rv2 = nghttp2_session_close_stream(session, opened_stream_id,
|
|
error_code);
|
|
|
|
if (nghttp2_is_fatal(rv2)) {
|
|
return rv2;
|
|
}
|
|
}
|
|
|
|
active_outbound_item_reset(aob, mem);
|
|
|
|
break;
|
|
}
|
|
} else {
|
|
DEBUGF("send: next frame: DATA\n");
|
|
|
|
if (item->aux_data.data.no_copy) {
|
|
aob->state = NGHTTP2_OB_SEND_NO_COPY;
|
|
break;
|
|
}
|
|
}
|
|
|
|
DEBUGF("send: start transmitting frame type=%u, length=%zd\n",
|
|
framebufs->cur->buf.pos[3],
|
|
framebufs->cur->buf.last - framebufs->cur->buf.pos);
|
|
|
|
aob->state = NGHTTP2_OB_SEND_DATA;
|
|
|
|
break;
|
|
}
|
|
case NGHTTP2_OB_SEND_DATA: {
|
|
size_t datalen;
|
|
nghttp2_buf *buf;
|
|
|
|
buf = &framebufs->cur->buf;
|
|
|
|
if (buf->pos == buf->last) {
|
|
DEBUGF("send: end transmission of a frame\n");
|
|
|
|
/* Frame has completely sent */
|
|
if (fast_cb) {
|
|
rv = session_after_frame_sent2(session);
|
|
} else {
|
|
rv = session_after_frame_sent1(session);
|
|
if (rv < 0) {
|
|
/* FATAL */
|
|
assert(nghttp2_is_fatal(rv));
|
|
return rv;
|
|
}
|
|
rv = session_after_frame_sent2(session);
|
|
}
|
|
if (rv < 0) {
|
|
/* FATAL */
|
|
assert(nghttp2_is_fatal(rv));
|
|
return rv;
|
|
}
|
|
/* We have already adjusted the next state */
|
|
break;
|
|
}
|
|
|
|
*data_ptr = buf->pos;
|
|
datalen = nghttp2_buf_len(buf);
|
|
|
|
/* We increment the offset here. If send_callback does not send
|
|
everything, we will adjust it. */
|
|
buf->pos += datalen;
|
|
|
|
return (ssize_t)datalen;
|
|
}
|
|
case NGHTTP2_OB_SEND_NO_COPY: {
|
|
nghttp2_stream *stream;
|
|
nghttp2_frame *frame;
|
|
int pause;
|
|
|
|
DEBUGF("send: no copy DATA\n");
|
|
|
|
frame = &aob->item->frame;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (stream == NULL) {
|
|
DEBUGF("send: no copy DATA cancelled because stream was closed\n");
|
|
|
|
active_outbound_item_reset(aob, mem);
|
|
|
|
break;
|
|
}
|
|
|
|
rv = session_call_send_data(session, aob->item, framebufs);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = session_detach_stream_item(session, stream);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_session_add_rst_stream(session, frame->hd.stream_id,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
active_outbound_item_reset(aob, mem);
|
|
|
|
break;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_WOULDBLOCK) {
|
|
return 0;
|
|
}
|
|
|
|
pause = (rv == NGHTTP2_ERR_PAUSE);
|
|
|
|
rv = session_after_frame_sent1(session);
|
|
if (rv < 0) {
|
|
assert(nghttp2_is_fatal(rv));
|
|
return rv;
|
|
}
|
|
rv = session_after_frame_sent2(session);
|
|
if (rv < 0) {
|
|
assert(nghttp2_is_fatal(rv));
|
|
return rv;
|
|
}
|
|
|
|
/* We have already adjusted the next state */
|
|
|
|
if (pause) {
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case NGHTTP2_OB_SEND_CLIENT_MAGIC: {
|
|
size_t datalen;
|
|
nghttp2_buf *buf;
|
|
|
|
buf = &framebufs->cur->buf;
|
|
|
|
if (buf->pos == buf->last) {
|
|
DEBUGF("send: end transmission of client magic\n");
|
|
active_outbound_item_reset(aob, mem);
|
|
break;
|
|
}
|
|
|
|
*data_ptr = buf->pos;
|
|
datalen = nghttp2_buf_len(buf);
|
|
|
|
buf->pos += datalen;
|
|
|
|
return (ssize_t)datalen;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ssize_t nghttp2_session_mem_send(nghttp2_session *session,
|
|
const uint8_t **data_ptr) {
|
|
int rv;
|
|
ssize_t len;
|
|
|
|
*data_ptr = NULL;
|
|
|
|
len = nghttp2_session_mem_send_internal(session, data_ptr, 1);
|
|
if (len <= 0) {
|
|
return len;
|
|
}
|
|
|
|
if (session->aob.item) {
|
|
/* We have to call session_after_frame_sent1 here to handle stream
|
|
closure upon transmission of frames. Otherwise, END_STREAM may
|
|
be reached to client before we call nghttp2_session_mem_send
|
|
again and we may get exceeding number of incoming streams. */
|
|
rv = session_after_frame_sent1(session);
|
|
if (rv < 0) {
|
|
assert(nghttp2_is_fatal(rv));
|
|
return (ssize_t)rv;
|
|
}
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
int nghttp2_session_send(nghttp2_session *session) {
|
|
const uint8_t *data = NULL;
|
|
ssize_t datalen;
|
|
ssize_t sentlen;
|
|
nghttp2_bufs *framebufs;
|
|
|
|
framebufs = &session->aob.framebufs;
|
|
|
|
for (;;) {
|
|
datalen = nghttp2_session_mem_send_internal(session, &data, 0);
|
|
if (datalen <= 0) {
|
|
return (int)datalen;
|
|
}
|
|
sentlen = session->callbacks.send_callback(session, data, (size_t)datalen,
|
|
0, session->user_data);
|
|
if (sentlen < 0) {
|
|
if (sentlen == NGHTTP2_ERR_WOULDBLOCK) {
|
|
/* Transmission canceled. Rewind the offset */
|
|
framebufs->cur->buf.pos -= datalen;
|
|
|
|
return 0;
|
|
}
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
/* Rewind the offset to the amount of unsent bytes */
|
|
framebufs->cur->buf.pos -= datalen - sentlen;
|
|
}
|
|
}
|
|
|
|
static ssize_t session_recv(nghttp2_session *session, uint8_t *buf,
|
|
size_t len) {
|
|
ssize_t rv;
|
|
rv = session->callbacks.recv_callback(session, buf, len, 0,
|
|
session->user_data);
|
|
if (rv > 0) {
|
|
if ((size_t)rv > len) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
} else if (rv < 0 && rv != NGHTTP2_ERR_WOULDBLOCK && rv != NGHTTP2_ERR_EOF) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static int session_call_on_begin_frame(nghttp2_session *session,
|
|
const nghttp2_frame_hd *hd) {
|
|
int rv;
|
|
|
|
if (session->callbacks.on_begin_frame_callback) {
|
|
|
|
rv = session->callbacks.on_begin_frame_callback(session, hd,
|
|
session->user_data);
|
|
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_on_frame_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
if (session->callbacks.on_frame_recv_callback) {
|
|
rv = session->callbacks.on_frame_recv_callback(session, frame,
|
|
session->user_data);
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_on_begin_headers(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
DEBUGF("recv: call on_begin_headers callback stream_id=%d\n",
|
|
frame->hd.stream_id);
|
|
if (session->callbacks.on_begin_headers_callback) {
|
|
rv = session->callbacks.on_begin_headers_callback(session, frame,
|
|
session->user_data);
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
return rv;
|
|
}
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_on_header(nghttp2_session *session,
|
|
const nghttp2_frame *frame,
|
|
const nghttp2_hd_nv *nv) {
|
|
int rv = 0;
|
|
if (session->callbacks.on_header_callback2) {
|
|
rv = session->callbacks.on_header_callback2(
|
|
session, frame, nv->name, nv->value, nv->flags, session->user_data);
|
|
} else if (session->callbacks.on_header_callback) {
|
|
rv = session->callbacks.on_header_callback(
|
|
session, frame, nv->name->base, nv->name->len, nv->value->base,
|
|
nv->value->len, nv->flags, session->user_data);
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_PAUSE || rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
return rv;
|
|
}
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_on_invalid_header(nghttp2_session *session,
|
|
const nghttp2_frame *frame,
|
|
const nghttp2_hd_nv *nv) {
|
|
int rv;
|
|
if (session->callbacks.on_invalid_header_callback2) {
|
|
rv = session->callbacks.on_invalid_header_callback2(
|
|
session, frame, nv->name, nv->value, nv->flags, session->user_data);
|
|
} else if (session->callbacks.on_invalid_header_callback) {
|
|
rv = session->callbacks.on_invalid_header_callback(
|
|
session, frame, nv->name->base, nv->name->len, nv->value->base,
|
|
nv->value->len, nv->flags, session->user_data);
|
|
} else {
|
|
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_PAUSE || rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
return rv;
|
|
}
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
session_call_on_extension_chunk_recv_callback(nghttp2_session *session,
|
|
const uint8_t *data, size_t len) {
|
|
int rv;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
if (session->callbacks.on_extension_chunk_recv_callback) {
|
|
rv = session->callbacks.on_extension_chunk_recv_callback(
|
|
session, &frame->hd, data, len, session->user_data);
|
|
if (rv == NGHTTP2_ERR_CANCEL) {
|
|
return rv;
|
|
}
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_unpack_extension_callback(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
void *payload = NULL;
|
|
|
|
rv = session->callbacks.unpack_extension_callback(
|
|
session, &payload, &frame->hd, session->user_data);
|
|
if (rv == NGHTTP2_ERR_CANCEL) {
|
|
return rv;
|
|
}
|
|
if (rv != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
frame->ext.payload = payload;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handles frame size error.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
static int session_handle_frame_size_error(nghttp2_session *session) {
|
|
/* TODO Currently no callback is called for this error, because we
|
|
call this callback before reading any payload */
|
|
return nghttp2_session_terminate_session(session, NGHTTP2_FRAME_SIZE_ERROR);
|
|
}
|
|
|
|
static uint32_t get_error_code_from_lib_error_code(int lib_error_code) {
|
|
switch (lib_error_code) {
|
|
case NGHTTP2_ERR_STREAM_CLOSED:
|
|
return NGHTTP2_STREAM_CLOSED;
|
|
case NGHTTP2_ERR_HEADER_COMP:
|
|
return NGHTTP2_COMPRESSION_ERROR;
|
|
case NGHTTP2_ERR_FRAME_SIZE_ERROR:
|
|
return NGHTTP2_FRAME_SIZE_ERROR;
|
|
case NGHTTP2_ERR_FLOW_CONTROL:
|
|
return NGHTTP2_FLOW_CONTROL_ERROR;
|
|
case NGHTTP2_ERR_REFUSED_STREAM:
|
|
return NGHTTP2_REFUSED_STREAM;
|
|
case NGHTTP2_ERR_PROTO:
|
|
case NGHTTP2_ERR_HTTP_HEADER:
|
|
case NGHTTP2_ERR_HTTP_MESSAGING:
|
|
return NGHTTP2_PROTOCOL_ERROR;
|
|
default:
|
|
return NGHTTP2_INTERNAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calls on_invalid_frame_recv_callback if it is set to |session|.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_CALLBACK_FAILURE
|
|
* User defined callback function fails.
|
|
*/
|
|
static int session_call_on_invalid_frame_recv_callback(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
int lib_error_code) {
|
|
if (session->callbacks.on_invalid_frame_recv_callback) {
|
|
if (session->callbacks.on_invalid_frame_recv_callback(
|
|
session, frame, lib_error_code, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_handle_invalid_stream2(nghttp2_session *session,
|
|
int32_t stream_id,
|
|
nghttp2_frame *frame,
|
|
int lib_error_code) {
|
|
int rv;
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, stream_id, get_error_code_from_lib_error_code(lib_error_code));
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
if (session->callbacks.on_invalid_frame_recv_callback) {
|
|
if (session->callbacks.on_invalid_frame_recv_callback(
|
|
session, frame, lib_error_code, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_handle_invalid_stream(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
int lib_error_code) {
|
|
return session_handle_invalid_stream2(session, frame->hd.stream_id, frame,
|
|
lib_error_code);
|
|
}
|
|
|
|
static int session_inflate_handle_invalid_stream(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
int lib_error_code) {
|
|
int rv;
|
|
rv = session_handle_invalid_stream(session, frame, lib_error_code);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
/*
|
|
* Handles invalid frame which causes connection error.
|
|
*/
|
|
static int session_handle_invalid_connection(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
int lib_error_code,
|
|
const char *reason) {
|
|
if (session->callbacks.on_invalid_frame_recv_callback) {
|
|
if (session->callbacks.on_invalid_frame_recv_callback(
|
|
session, frame, lib_error_code, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return nghttp2_session_terminate_session_with_reason(
|
|
session, get_error_code_from_lib_error_code(lib_error_code), reason);
|
|
}
|
|
|
|
static int session_inflate_handle_invalid_connection(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
int lib_error_code,
|
|
const char *reason) {
|
|
int rv;
|
|
rv =
|
|
session_handle_invalid_connection(session, frame, lib_error_code, reason);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
/*
|
|
* Inflates header block in the memory pointed by |in| with |inlen|
|
|
* bytes. If this function returns NGHTTP2_ERR_PAUSE, the caller must
|
|
* call this function again, until it returns 0 or one of negative
|
|
* error code. If |call_header_cb| is zero, the on_header_callback
|
|
* are not invoked and the function never return NGHTTP2_ERR_PAUSE. If
|
|
* the given |in| is the last chunk of header block, the |final| must
|
|
* be nonzero. If header block is successfully processed (which is
|
|
* indicated by the return value 0, NGHTTP2_ERR_PAUSE or
|
|
* NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE), the number of processed
|
|
* input bytes is assigned to the |*readlen_ptr|.
|
|
*
|
|
* This function return 0 if it succeeds, or one of the negative error
|
|
* codes:
|
|
*
|
|
* NGHTTP2_ERR_CALLBACK_FAILURE
|
|
* The callback function failed.
|
|
* NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE
|
|
* The callback returns this error code, indicating that this
|
|
* stream should be RST_STREAMed.
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
* NGHTTP2_ERR_PAUSE
|
|
* The callback function returned NGHTTP2_ERR_PAUSE
|
|
* NGHTTP2_ERR_HEADER_COMP
|
|
* Header decompression failed
|
|
*/
|
|
static int inflate_header_block(nghttp2_session *session, nghttp2_frame *frame,
|
|
size_t *readlen_ptr, uint8_t *in, size_t inlen,
|
|
int final, int call_header_cb) {
|
|
ssize_t proclen;
|
|
int rv;
|
|
int inflate_flags;
|
|
nghttp2_hd_nv nv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_stream *subject_stream;
|
|
int trailer = 0;
|
|
|
|
*readlen_ptr = 0;
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
if (frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
|
subject_stream = nghttp2_session_get_stream(
|
|
session, frame->push_promise.promised_stream_id);
|
|
} else {
|
|
subject_stream = stream;
|
|
trailer = session_trailer_headers(session, stream, frame);
|
|
}
|
|
|
|
DEBUGF("recv: decoding header block %zu bytes\n", inlen);
|
|
for (;;) {
|
|
inflate_flags = 0;
|
|
proclen = nghttp2_hd_inflate_hd_nv(&session->hd_inflater, &nv,
|
|
&inflate_flags, in, inlen, final);
|
|
if (nghttp2_is_fatal((int)proclen)) {
|
|
return (int)proclen;
|
|
}
|
|
if (proclen < 0) {
|
|
if (session->iframe.state == NGHTTP2_IB_READ_HEADER_BLOCK) {
|
|
if (subject_stream && subject_stream->state != NGHTTP2_STREAM_CLOSING) {
|
|
/* Adding RST_STREAM here is very important. It prevents
|
|
from invoking subsequent callbacks for the same stream
|
|
ID. */
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, subject_stream->stream_id, NGHTTP2_COMPRESSION_ERROR);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
rv =
|
|
nghttp2_session_terminate_session(session, NGHTTP2_COMPRESSION_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return NGHTTP2_ERR_HEADER_COMP;
|
|
}
|
|
in += proclen;
|
|
inlen -= (size_t)proclen;
|
|
*readlen_ptr += (size_t)proclen;
|
|
|
|
DEBUGF("recv: proclen=%zd\n", proclen);
|
|
|
|
if (call_header_cb && (inflate_flags & NGHTTP2_HD_INFLATE_EMIT)) {
|
|
rv = 0;
|
|
if (subject_stream) {
|
|
if (session_enforce_http_messaging(session)) {
|
|
rv = nghttp2_http_on_header(session, subject_stream, frame, &nv,
|
|
trailer);
|
|
|
|
if (rv == NGHTTP2_ERR_IGN_HTTP_HEADER) {
|
|
/* Don't overwrite rv here */
|
|
int rv2;
|
|
|
|
rv2 = session_call_on_invalid_header(session, frame, &nv);
|
|
if (rv2 == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = NGHTTP2_ERR_HTTP_HEADER;
|
|
} else {
|
|
if (rv2 != 0) {
|
|
return rv2;
|
|
}
|
|
|
|
/* header is ignored */
|
|
DEBUGF("recv: HTTP ignored: type=%u, id=%d, header %.*s: %.*s\n",
|
|
frame->hd.type, frame->hd.stream_id, (int)nv.name->len,
|
|
nv.name->base, (int)nv.value->len, nv.value->base);
|
|
|
|
rv2 = session_call_error_callback(
|
|
session, NGHTTP2_ERR_HTTP_HEADER,
|
|
"Ignoring received invalid HTTP header field: frame type: "
|
|
"%u, stream: %d, name: [%.*s], value: [%.*s]",
|
|
frame->hd.type, frame->hd.stream_id, (int)nv.name->len,
|
|
nv.name->base, (int)nv.value->len, nv.value->base);
|
|
|
|
if (nghttp2_is_fatal(rv2)) {
|
|
return rv2;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_HTTP_HEADER) {
|
|
DEBUGF("recv: HTTP error: type=%u, id=%d, header %.*s: %.*s\n",
|
|
frame->hd.type, frame->hd.stream_id, (int)nv.name->len,
|
|
nv.name->base, (int)nv.value->len, nv.value->base);
|
|
|
|
rv = session_call_error_callback(
|
|
session, NGHTTP2_ERR_HTTP_HEADER,
|
|
"Invalid HTTP header field was received: frame type: "
|
|
"%u, stream: %d, name: [%.*s], value: [%.*s]",
|
|
frame->hd.type, frame->hd.stream_id, (int)nv.name->len,
|
|
nv.name->base, (int)nv.value->len, nv.value->base);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = session_handle_invalid_stream2(session,
|
|
subject_stream->stream_id,
|
|
frame, NGHTTP2_ERR_HTTP_HEADER);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
if (rv == 0) {
|
|
rv = session_call_on_header(session, frame, &nv);
|
|
/* This handles NGHTTP2_ERR_PAUSE and
|
|
NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE as well */
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (inflate_flags & NGHTTP2_HD_INFLATE_FINAL) {
|
|
nghttp2_hd_inflate_end_headers(&session->hd_inflater);
|
|
break;
|
|
}
|
|
if ((inflate_flags & NGHTTP2_HD_INFLATE_EMIT) == 0 && inlen == 0) {
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Call this function when HEADERS frame was completely received.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of negative error
|
|
* codes:
|
|
*
|
|
* NGHTTP2_ERR_CALLBACK_FAILURE
|
|
* The callback function failed.
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
static int session_end_stream_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
|
|
assert(frame->hd.type == NGHTTP2_HEADERS);
|
|
|
|
if (session->server && session_enforce_http_messaging(session) &&
|
|
frame->headers.cat == NGHTTP2_HCAT_REQUEST &&
|
|
(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES) &&
|
|
(stream->http_flags & NGHTTP2_HTTP_FLAG_PRIORITY)) {
|
|
rv = session_update_stream_priority(session, stream, stream->http_extpri);
|
|
if (rv != 0) {
|
|
assert(nghttp2_is_fatal(rv));
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
if ((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
|
|
return 0;
|
|
}
|
|
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
rv = nghttp2_session_close_stream_if_shut_rdwr(session, stream);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_after_header_block_received(nghttp2_session *session) {
|
|
int rv = 0;
|
|
nghttp2_frame *frame = &session->iframe.frame;
|
|
nghttp2_stream *stream;
|
|
|
|
/* We don't call on_frame_recv_callback if stream has been closed
|
|
already or being closed. */
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream || stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return 0;
|
|
}
|
|
|
|
if (session_enforce_http_messaging(session)) {
|
|
if (frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
|
nghttp2_stream *subject_stream;
|
|
|
|
subject_stream = nghttp2_session_get_stream(
|
|
session, frame->push_promise.promised_stream_id);
|
|
if (subject_stream) {
|
|
rv = nghttp2_http_on_request_headers(subject_stream, frame);
|
|
}
|
|
} else {
|
|
assert(frame->hd.type == NGHTTP2_HEADERS);
|
|
switch (frame->headers.cat) {
|
|
case NGHTTP2_HCAT_REQUEST:
|
|
rv = nghttp2_http_on_request_headers(stream, frame);
|
|
break;
|
|
case NGHTTP2_HCAT_RESPONSE:
|
|
case NGHTTP2_HCAT_PUSH_RESPONSE:
|
|
rv = nghttp2_http_on_response_headers(stream);
|
|
break;
|
|
case NGHTTP2_HCAT_HEADERS:
|
|
if (stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) {
|
|
assert(!session->server);
|
|
rv = nghttp2_http_on_response_headers(stream);
|
|
} else {
|
|
rv = nghttp2_http_on_trailer_headers(stream, frame);
|
|
}
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
if (rv == 0 && (frame->hd.flags & NGHTTP2_FLAG_END_STREAM)) {
|
|
rv = nghttp2_http_on_remote_end_stream(stream);
|
|
}
|
|
}
|
|
if (rv != 0) {
|
|
int32_t stream_id;
|
|
|
|
if (frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
|
stream_id = frame->push_promise.promised_stream_id;
|
|
} else {
|
|
stream_id = frame->hd.stream_id;
|
|
}
|
|
|
|
rv = session_handle_invalid_stream2(session, stream_id, frame,
|
|
NGHTTP2_ERR_HTTP_MESSAGING);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (frame->hd.type == NGHTTP2_HEADERS &&
|
|
(frame->hd.flags & NGHTTP2_FLAG_END_STREAM)) {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
/* Don't call nghttp2_session_close_stream_if_shut_rdwr
|
|
because RST_STREAM has been submitted. */
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
rv = session_call_on_frame_received(session, frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (frame->hd.type != NGHTTP2_HEADERS) {
|
|
return 0;
|
|
}
|
|
|
|
return session_end_stream_headers_received(session, frame, stream);
|
|
}
|
|
|
|
int nghttp2_session_on_request_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv = 0;
|
|
nghttp2_stream *stream;
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "request HEADERS: stream_id == 0");
|
|
}
|
|
|
|
/* If client receives idle stream from server, it is invalid
|
|
regardless stream ID is even or odd. This is because client is
|
|
not expected to receive request from server. */
|
|
if (!session->server) {
|
|
if (session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"request HEADERS: client received request");
|
|
}
|
|
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
assert(session->server);
|
|
|
|
if (!session_is_new_peer_stream_id(session, frame->hd.stream_id)) {
|
|
if (frame->hd.stream_id == 0 ||
|
|
nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"request HEADERS: invalid stream_id");
|
|
}
|
|
|
|
/* RFC 7540 says if an endpoint receives a HEADERS with invalid
|
|
* stream ID (e.g, numerically smaller than previous), it MUST
|
|
* issue connection error with error code PROTOCOL_ERROR. It is a
|
|
* bit hard to detect this, since we cannot remember all streams
|
|
* we observed so far.
|
|
*
|
|
* You might imagine this is really easy. But no. HTTP/2 is
|
|
* asynchronous protocol, and usually client and server do not
|
|
* share the complete picture of open/closed stream status. For
|
|
* example, after server sends RST_STREAM for a stream, client may
|
|
* send trailer HEADERS for that stream. If naive server detects
|
|
* that, and issued connection error, then it is a bug of server
|
|
* implementation since client is not wrong if it did not get
|
|
* RST_STREAM when it issued trailer HEADERS.
|
|
*
|
|
* At the moment, we are very conservative here. We only use
|
|
* connection error if stream ID refers idle stream, or we are
|
|
* sure that stream is half-closed(remote) or closed. Otherwise
|
|
* we just ignore HEADERS for now.
|
|
*/
|
|
stream = nghttp2_session_get_stream_raw(session, frame->hd.stream_id);
|
|
if (stream && (stream->shut_flags & NGHTTP2_SHUT_RD)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_STREAM_CLOSED, "HEADERS: stream closed");
|
|
}
|
|
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
session->last_recv_stream_id = frame->hd.stream_id;
|
|
|
|
if (session_is_incoming_concurrent_streams_max(session)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"request HEADERS: max concurrent streams exceeded");
|
|
}
|
|
|
|
if (!session_allow_incoming_new_stream(session)) {
|
|
/* We just ignore stream after GOAWAY was sent */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
if (frame->headers.pri_spec.stream_id == frame->hd.stream_id) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "request HEADERS: depend on itself");
|
|
}
|
|
|
|
if (session_is_incoming_concurrent_streams_pending_max(session)) {
|
|
return session_inflate_handle_invalid_stream(session, frame,
|
|
NGHTTP2_ERR_REFUSED_STREAM);
|
|
}
|
|
|
|
stream = nghttp2_session_open_stream(
|
|
session, frame->hd.stream_id, NGHTTP2_STREAM_FLAG_NONE,
|
|
&frame->headers.pri_spec, NGHTTP2_STREAM_OPENING, NULL);
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
rv = nghttp2_session_adjust_closed_stream(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session->last_proc_stream_id = session->last_recv_stream_id;
|
|
|
|
rv = session_call_on_begin_headers(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_on_response_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
/* This function is only called if stream->state ==
|
|
NGHTTP2_STREAM_OPENING and stream_id is local side initiated. */
|
|
assert(stream->state == NGHTTP2_STREAM_OPENING &&
|
|
nghttp2_session_is_my_stream_id(session, frame->hd.stream_id));
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "response HEADERS: stream_id == 0");
|
|
}
|
|
if (stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
/* half closed (remote): from the spec:
|
|
|
|
If an endpoint receives additional frames for a stream that is
|
|
in this state it MUST respond with a stream error (Section
|
|
5.4.2) of type STREAM_CLOSED.
|
|
|
|
We go further, and make it connection error.
|
|
*/
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_STREAM_CLOSED, "HEADERS: stream closed");
|
|
}
|
|
stream->state = NGHTTP2_STREAM_OPENED;
|
|
rv = session_call_on_begin_headers(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_on_push_response_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream) {
|
|
int rv = 0;
|
|
assert(stream->state == NGHTTP2_STREAM_RESERVED);
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"push response HEADERS: stream_id == 0");
|
|
}
|
|
|
|
if (session->server) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"HEADERS: no HEADERS allowed from client in reserved state");
|
|
}
|
|
|
|
if (session_is_incoming_concurrent_streams_max(session)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"push response HEADERS: max concurrent streams exceeded");
|
|
}
|
|
|
|
if (!session_allow_incoming_new_stream(session)) {
|
|
/* We don't accept new stream after GOAWAY was sent. */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
if (session_is_incoming_concurrent_streams_pending_max(session)) {
|
|
return session_inflate_handle_invalid_stream(session, frame,
|
|
NGHTTP2_ERR_REFUSED_STREAM);
|
|
}
|
|
|
|
nghttp2_stream_promise_fulfilled(stream);
|
|
if (!nghttp2_session_is_my_stream_id(session, stream->stream_id)) {
|
|
--session->num_incoming_reserved_streams;
|
|
}
|
|
++session->num_incoming_streams;
|
|
rv = session_call_on_begin_headers(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_on_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream) {
|
|
int rv = 0;
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "HEADERS: stream_id == 0");
|
|
}
|
|
if ((stream->shut_flags & NGHTTP2_SHUT_RD)) {
|
|
/* half closed (remote): from the spec:
|
|
|
|
If an endpoint receives additional frames for a stream that is
|
|
in this state it MUST respond with a stream error (Section
|
|
5.4.2) of type STREAM_CLOSED.
|
|
|
|
we go further, and make it connection error.
|
|
*/
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_STREAM_CLOSED, "HEADERS: stream closed");
|
|
}
|
|
if (nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
if (stream->state == NGHTTP2_STREAM_OPENED) {
|
|
rv = session_call_on_begin_headers(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
/* If this is remote peer initiated stream, it is OK unless it
|
|
has sent END_STREAM frame already. But if stream is in
|
|
NGHTTP2_STREAM_CLOSING, we discard the frame. This is a race
|
|
condition. */
|
|
if (stream->state != NGHTTP2_STREAM_CLOSING) {
|
|
rv = session_call_on_begin_headers(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
static int session_process_headers_frame(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
nghttp2_stream *stream;
|
|
|
|
rv = nghttp2_frame_unpack_headers_payload(&frame->headers, iframe->sbuf.pos);
|
|
|
|
if (rv != 0) {
|
|
return nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "HEADERS: could not unpack");
|
|
}
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream) {
|
|
frame->headers.cat = NGHTTP2_HCAT_REQUEST;
|
|
return nghttp2_session_on_request_headers_received(session, frame);
|
|
}
|
|
|
|
if (stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
frame->headers.cat = NGHTTP2_HCAT_PUSH_RESPONSE;
|
|
return nghttp2_session_on_push_response_headers_received(session, frame,
|
|
stream);
|
|
}
|
|
|
|
if (stream->state == NGHTTP2_STREAM_OPENING &&
|
|
nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
frame->headers.cat = NGHTTP2_HCAT_RESPONSE;
|
|
return nghttp2_session_on_response_headers_received(session, frame, stream);
|
|
}
|
|
|
|
frame->headers.cat = NGHTTP2_HCAT_HEADERS;
|
|
return nghttp2_session_on_headers_received(session, frame, stream);
|
|
}
|
|
|
|
int nghttp2_session_on_priority_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
|
|
assert(!session_no_rfc7540_pri_no_fallback(session));
|
|
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"PRIORITY: stream_id == 0");
|
|
}
|
|
|
|
if (frame->priority.pri_spec.stream_id == frame->hd.stream_id) {
|
|
return nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "depend on itself");
|
|
}
|
|
|
|
if (!session->server) {
|
|
/* Re-prioritization works only in server */
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream_raw(session, frame->hd.stream_id);
|
|
|
|
if (!stream) {
|
|
/* PRIORITY against idle stream can create anchor node in
|
|
dependency tree. */
|
|
if (!session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return 0;
|
|
}
|
|
|
|
stream = nghttp2_session_open_stream(
|
|
session, frame->hd.stream_id, NGHTTP2_STREAM_FLAG_NONE,
|
|
&frame->priority.pri_spec, NGHTTP2_STREAM_IDLE, NULL);
|
|
|
|
if (stream == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
rv = nghttp2_session_adjust_idle_stream(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
} else {
|
|
rv = nghttp2_session_reprioritize_stream(session, stream,
|
|
&frame->priority.pri_spec);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_session_adjust_idle_stream(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
static int session_process_priority_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
assert(!session_no_rfc7540_pri_no_fallback(session));
|
|
|
|
nghttp2_frame_unpack_priority_payload(&frame->priority, iframe->sbuf.pos);
|
|
|
|
return nghttp2_session_on_priority_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_rst_stream_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"RST_STREAM: stream_id == 0");
|
|
}
|
|
|
|
if (session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"RST_STREAM: stream in idle");
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (stream) {
|
|
/* We may use stream->shut_flags for strict error checking. */
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
}
|
|
|
|
rv = session_call_on_frame_received(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
rv = nghttp2_session_close_stream(session, frame->hd.stream_id,
|
|
frame->rst_stream.error_code);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_process_rst_stream_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
nghttp2_frame_unpack_rst_stream_payload(&frame->rst_stream, iframe->sbuf.pos);
|
|
|
|
return nghttp2_session_on_rst_stream_received(session, frame);
|
|
}
|
|
|
|
static int update_remote_initial_window_size_func(void *entry, void *ptr) {
|
|
int rv;
|
|
nghttp2_update_window_size_arg *arg;
|
|
nghttp2_stream *stream;
|
|
|
|
arg = (nghttp2_update_window_size_arg *)ptr;
|
|
stream = (nghttp2_stream *)entry;
|
|
|
|
rv = nghttp2_stream_update_remote_initial_window_size(
|
|
stream, arg->new_window_size, arg->old_window_size);
|
|
if (rv != 0) {
|
|
return nghttp2_session_add_rst_stream(arg->session, stream->stream_id,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
|
|
/* If window size gets positive, push deferred DATA frame to
|
|
outbound queue. */
|
|
if (stream->remote_window_size > 0 &&
|
|
nghttp2_stream_check_deferred_by_flow_control(stream)) {
|
|
|
|
rv = session_resume_deferred_stream_item(
|
|
arg->session, stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Updates the remote initial window size of all active streams. If
|
|
* error occurs, all streams may not be updated.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
static int
|
|
session_update_remote_initial_window_size(nghttp2_session *session,
|
|
int32_t new_initial_window_size) {
|
|
nghttp2_update_window_size_arg arg;
|
|
|
|
arg.session = session;
|
|
arg.new_window_size = new_initial_window_size;
|
|
arg.old_window_size = (int32_t)session->remote_settings.initial_window_size;
|
|
|
|
return nghttp2_map_each(&session->streams,
|
|
update_remote_initial_window_size_func, &arg);
|
|
}
|
|
|
|
static int update_local_initial_window_size_func(void *entry, void *ptr) {
|
|
int rv;
|
|
nghttp2_update_window_size_arg *arg;
|
|
nghttp2_stream *stream;
|
|
arg = (nghttp2_update_window_size_arg *)ptr;
|
|
stream = (nghttp2_stream *)entry;
|
|
rv = nghttp2_stream_update_local_initial_window_size(
|
|
stream, arg->new_window_size, arg->old_window_size);
|
|
if (rv != 0) {
|
|
return nghttp2_session_add_rst_stream(arg->session, stream->stream_id,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
|
|
if (stream->window_update_queued) {
|
|
return 0;
|
|
}
|
|
|
|
if (arg->session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) {
|
|
return session_update_stream_consumed_size(arg->session, stream, 0);
|
|
}
|
|
|
|
if (nghttp2_should_send_window_update(stream->local_window_size,
|
|
stream->recv_window_size)) {
|
|
|
|
rv = nghttp2_session_add_window_update(arg->session, NGHTTP2_FLAG_NONE,
|
|
stream->stream_id,
|
|
stream->recv_window_size);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
stream->recv_window_size = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Updates the local initial window size of all active streams. If
|
|
* error occurs, all streams may not be updated.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
static int
|
|
session_update_local_initial_window_size(nghttp2_session *session,
|
|
int32_t new_initial_window_size,
|
|
int32_t old_initial_window_size) {
|
|
nghttp2_update_window_size_arg arg;
|
|
arg.session = session;
|
|
arg.new_window_size = new_initial_window_size;
|
|
arg.old_window_size = old_initial_window_size;
|
|
return nghttp2_map_each(&session->streams,
|
|
update_local_initial_window_size_func, &arg);
|
|
}
|
|
|
|
/*
|
|
* Apply SETTINGS values |iv| having |niv| elements to the local
|
|
* settings. We assumes that all values in |iv| is correct, since we
|
|
* validated them in nghttp2_session_add_settings() already.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_HEADER_COMP
|
|
* The header table size is out of range
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory
|
|
*/
|
|
int nghttp2_session_update_local_settings(nghttp2_session *session,
|
|
nghttp2_settings_entry *iv,
|
|
size_t niv) {
|
|
int rv;
|
|
size_t i;
|
|
int32_t new_initial_window_size = -1;
|
|
uint32_t header_table_size = 0;
|
|
uint32_t min_header_table_size = UINT32_MAX;
|
|
uint8_t header_table_size_seen = 0;
|
|
/* For NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, use the value last
|
|
seen. For NGHTTP2_SETTINGS_HEADER_TABLE_SIZE, use both minimum
|
|
value and last seen value. */
|
|
for (i = 0; i < niv; ++i) {
|
|
switch (iv[i].settings_id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
header_table_size_seen = 1;
|
|
header_table_size = iv[i].value;
|
|
min_header_table_size = nghttp2_min(min_header_table_size, iv[i].value);
|
|
break;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
new_initial_window_size = (int32_t)iv[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if (header_table_size_seen) {
|
|
if (min_header_table_size < header_table_size) {
|
|
rv = nghttp2_hd_inflate_change_table_size(&session->hd_inflater,
|
|
min_header_table_size);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
rv = nghttp2_hd_inflate_change_table_size(&session->hd_inflater,
|
|
header_table_size);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
if (new_initial_window_size != -1) {
|
|
rv = session_update_local_initial_window_size(
|
|
session, new_initial_window_size,
|
|
(int32_t)session->local_settings.initial_window_size);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < niv; ++i) {
|
|
switch (iv[i].settings_id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
session->local_settings.header_table_size = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_ENABLE_PUSH:
|
|
session->local_settings.enable_push = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
|
|
session->local_settings.max_concurrent_streams = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
session->local_settings.initial_window_size = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
|
|
session->local_settings.max_frame_size = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
|
|
session->local_settings.max_header_list_size = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
|
|
session->local_settings.enable_connect_protocol = iv[i].value;
|
|
break;
|
|
case NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES:
|
|
session->local_settings.no_rfc7540_priorities = iv[i].value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_on_settings_received(nghttp2_session *session,
|
|
nghttp2_frame *frame, int noack) {
|
|
int rv;
|
|
size_t i;
|
|
nghttp2_mem *mem;
|
|
nghttp2_inflight_settings *settings;
|
|
|
|
mem = &session->mem;
|
|
|
|
if (frame->hd.stream_id != 0) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: stream_id != 0");
|
|
}
|
|
if (frame->hd.flags & NGHTTP2_FLAG_ACK) {
|
|
if (frame->settings.niv != 0) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_FRAME_SIZE_ERROR,
|
|
"SETTINGS: ACK and payload != 0");
|
|
}
|
|
|
|
settings = session->inflight_settings_head;
|
|
|
|
if (!settings) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "SETTINGS: unexpected ACK");
|
|
}
|
|
|
|
rv = nghttp2_session_update_local_settings(session, settings->iv,
|
|
settings->niv);
|
|
|
|
session->inflight_settings_head = settings->next;
|
|
|
|
inflight_settings_del(settings, mem);
|
|
|
|
if (rv != 0) {
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return session_handle_invalid_connection(session, frame, rv, NULL);
|
|
}
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
if (!session->remote_settings_received) {
|
|
session->remote_settings.max_concurrent_streams =
|
|
NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS;
|
|
session->remote_settings_received = 1;
|
|
}
|
|
|
|
for (i = 0; i < frame->settings.niv; ++i) {
|
|
nghttp2_settings_entry *entry = &frame->settings.iv[i];
|
|
|
|
switch (entry->settings_id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
|
|
rv = nghttp2_hd_deflate_change_table_size(&session->hd_deflater,
|
|
entry->value);
|
|
if (rv != 0) {
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
} else {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_HEADER_COMP, NULL);
|
|
}
|
|
}
|
|
|
|
session->remote_settings.header_table_size = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_ENABLE_PUSH:
|
|
|
|
if (entry->value != 0 && entry->value != 1) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: invalid SETTINGS_ENBLE_PUSH");
|
|
}
|
|
|
|
if (!session->server && entry->value != 0) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: server attempted to enable push");
|
|
}
|
|
|
|
session->remote_settings.enable_push = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
|
|
|
|
session->remote_settings.max_concurrent_streams = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
|
|
/* Update the initial window size of the all active streams */
|
|
/* Check that initial_window_size < (1u << 31) */
|
|
if (entry->value > NGHTTP2_MAX_WINDOW_SIZE) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_FLOW_CONTROL,
|
|
"SETTINGS: too large SETTINGS_INITIAL_WINDOW_SIZE");
|
|
}
|
|
|
|
rv = session_update_remote_initial_window_size(session,
|
|
(int32_t)entry->value);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (rv != 0) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_FLOW_CONTROL, NULL);
|
|
}
|
|
|
|
session->remote_settings.initial_window_size = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
|
|
|
|
if (entry->value < NGHTTP2_MAX_FRAME_SIZE_MIN ||
|
|
entry->value > NGHTTP2_MAX_FRAME_SIZE_MAX) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: invalid SETTINGS_MAX_FRAME_SIZE");
|
|
}
|
|
|
|
session->remote_settings.max_frame_size = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
|
|
|
|
session->remote_settings.max_header_list_size = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
|
|
|
|
if (entry->value != 0 && entry->value != 1) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: invalid SETTINGS_ENABLE_CONNECT_PROTOCOL");
|
|
}
|
|
|
|
if (!session->server &&
|
|
session->remote_settings.enable_connect_protocol &&
|
|
entry->value == 0) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: server attempted to disable "
|
|
"SETTINGS_ENABLE_CONNECT_PROTOCOL");
|
|
}
|
|
|
|
session->remote_settings.enable_connect_protocol = entry->value;
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES:
|
|
|
|
if (entry->value != 0 && entry->value != 1) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: invalid SETTINGS_NO_RFC7540_PRIORITIES");
|
|
}
|
|
|
|
if (session->remote_settings.no_rfc7540_priorities != UINT32_MAX &&
|
|
session->remote_settings.no_rfc7540_priorities != entry->value) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"SETTINGS: SETTINGS_NO_RFC7540_PRIORITIES cannot be changed");
|
|
}
|
|
|
|
session->remote_settings.no_rfc7540_priorities = entry->value;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (session->remote_settings.no_rfc7540_priorities == UINT32_MAX) {
|
|
session->remote_settings.no_rfc7540_priorities = 0;
|
|
|
|
if (session->server && session->pending_no_rfc7540_priorities &&
|
|
(session->opt_flags &
|
|
NGHTTP2_OPTMASK_SERVER_FALLBACK_RFC7540_PRIORITIES)) {
|
|
session->fallback_rfc7540_priorities = 1;
|
|
}
|
|
}
|
|
|
|
if (!noack && !session_is_closing(session)) {
|
|
rv = nghttp2_session_add_settings(session, NGHTTP2_FLAG_ACK, NULL, 0);
|
|
|
|
if (rv != 0) {
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return session_handle_invalid_connection(session, frame,
|
|
NGHTTP2_ERR_INTERNAL, NULL);
|
|
}
|
|
}
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
static int session_process_settings_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
size_t i;
|
|
nghttp2_settings_entry min_header_size_entry;
|
|
|
|
if (iframe->max_niv) {
|
|
min_header_size_entry = iframe->iv[iframe->max_niv - 1];
|
|
|
|
if (min_header_size_entry.value < UINT32_MAX) {
|
|
/* If we have less value, then we must have
|
|
SETTINGS_HEADER_TABLE_SIZE in i < iframe->niv */
|
|
for (i = 0; i < iframe->niv; ++i) {
|
|
if (iframe->iv[i].settings_id == NGHTTP2_SETTINGS_HEADER_TABLE_SIZE) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
assert(i < iframe->niv);
|
|
|
|
if (min_header_size_entry.value != iframe->iv[i].value) {
|
|
iframe->iv[iframe->niv++] = iframe->iv[i];
|
|
iframe->iv[i] = min_header_size_entry;
|
|
}
|
|
}
|
|
}
|
|
|
|
nghttp2_frame_unpack_settings_payload(&frame->settings, iframe->iv,
|
|
iframe->niv);
|
|
|
|
iframe->iv = NULL;
|
|
iframe->niv = 0;
|
|
iframe->max_niv = 0;
|
|
|
|
return nghttp2_session_on_settings_received(session, frame, 0 /* ACK */);
|
|
}
|
|
|
|
int nghttp2_session_on_push_promise_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_stream *promised_stream;
|
|
nghttp2_priority_spec pri_spec;
|
|
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "PUSH_PROMISE: stream_id == 0");
|
|
}
|
|
if (session->server || session->local_settings.enable_push == 0) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "PUSH_PROMISE: push disabled");
|
|
}
|
|
|
|
if (!nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "PUSH_PROMISE: invalid stream_id");
|
|
}
|
|
|
|
if (!session_allow_incoming_new_stream(session)) {
|
|
/* We just discard PUSH_PROMISE after GOAWAY was sent */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
if (!session_is_new_peer_stream_id(session,
|
|
frame->push_promise.promised_stream_id)) {
|
|
/* The spec says if an endpoint receives a PUSH_PROMISE with
|
|
illegal stream ID is subject to a connection error of type
|
|
PROTOCOL_ERROR. */
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"PUSH_PROMISE: invalid promised_stream_id");
|
|
}
|
|
|
|
if (session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "PUSH_PROMISE: stream in idle");
|
|
}
|
|
|
|
session->last_recv_stream_id = frame->push_promise.promised_stream_id;
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream || stream->state == NGHTTP2_STREAM_CLOSING ||
|
|
!session->pending_enable_push ||
|
|
session->num_incoming_reserved_streams >=
|
|
session->max_incoming_reserved_streams) {
|
|
/* Currently, client does not retain closed stream, so we don't
|
|
check NGHTTP2_SHUT_RD condition here. */
|
|
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, frame->push_promise.promised_stream_id, NGHTTP2_CANCEL);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
if (stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
return session_inflate_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_STREAM_CLOSED,
|
|
"PUSH_PROMISE: stream closed");
|
|
}
|
|
|
|
nghttp2_priority_spec_init(&pri_spec, stream->stream_id,
|
|
NGHTTP2_DEFAULT_WEIGHT, 0);
|
|
|
|
promised_stream = nghttp2_session_open_stream(
|
|
session, frame->push_promise.promised_stream_id, NGHTTP2_STREAM_FLAG_NONE,
|
|
&pri_spec, NGHTTP2_STREAM_RESERVED, NULL);
|
|
|
|
if (!promised_stream) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
/* We don't call nghttp2_session_adjust_closed_stream(), since we
|
|
don't keep closed stream in client side */
|
|
|
|
session->last_proc_stream_id = session->last_recv_stream_id;
|
|
rv = session_call_on_begin_headers(session, frame);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_process_push_promise_frame(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
rv = nghttp2_frame_unpack_push_promise_payload(&frame->push_promise,
|
|
iframe->sbuf.pos);
|
|
|
|
if (rv != 0) {
|
|
return nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "PUSH_PROMISE: could not unpack");
|
|
}
|
|
|
|
return nghttp2_session_on_push_promise_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_ping_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv = 0;
|
|
if (frame->hd.stream_id != 0) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"PING: stream_id != 0");
|
|
}
|
|
if ((session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_PING_ACK) == 0 &&
|
|
(frame->hd.flags & NGHTTP2_FLAG_ACK) == 0 &&
|
|
!session_is_closing(session)) {
|
|
/* Peer sent ping, so ping it back */
|
|
rv = nghttp2_session_add_ping(session, NGHTTP2_FLAG_ACK,
|
|
frame->ping.opaque_data);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
static int session_process_ping_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
nghttp2_frame_unpack_ping_payload(&frame->ping, iframe->sbuf.pos);
|
|
|
|
return nghttp2_session_on_ping_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_goaway_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
|
|
if (frame->hd.stream_id != 0) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"GOAWAY: stream_id != 0");
|
|
}
|
|
/* Spec says Endpoints MUST NOT increase the value they send in the
|
|
last stream identifier. */
|
|
if ((frame->goaway.last_stream_id > 0 &&
|
|
!nghttp2_session_is_my_stream_id(session,
|
|
frame->goaway.last_stream_id)) ||
|
|
session->remote_last_stream_id < frame->goaway.last_stream_id) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"GOAWAY: invalid last_stream_id");
|
|
}
|
|
|
|
session->goaway_flags |= NGHTTP2_GOAWAY_RECV;
|
|
|
|
session->remote_last_stream_id = frame->goaway.last_stream_id;
|
|
|
|
rv = session_call_on_frame_received(session, frame);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return session_close_stream_on_goaway(session, frame->goaway.last_stream_id,
|
|
0);
|
|
}
|
|
|
|
static int session_process_goaway_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
nghttp2_frame_unpack_goaway_payload(&frame->goaway, iframe->sbuf.pos,
|
|
iframe->lbuf.pos,
|
|
nghttp2_buf_len(&iframe->lbuf));
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, NULL, 0);
|
|
|
|
return nghttp2_session_on_goaway_received(session, frame);
|
|
}
|
|
|
|
static int
|
|
session_on_connection_window_update_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
/* Handle connection-level flow control */
|
|
if (frame->window_update.window_size_increment == 0) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"WINDOW_UPDATE: window_size_increment == 0");
|
|
}
|
|
|
|
if (NGHTTP2_MAX_WINDOW_SIZE - frame->window_update.window_size_increment <
|
|
session->remote_window_size) {
|
|
return session_handle_invalid_connection(session, frame,
|
|
NGHTTP2_ERR_FLOW_CONTROL, NULL);
|
|
}
|
|
session->remote_window_size += frame->window_update.window_size_increment;
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
static int session_on_stream_window_update_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
|
|
if (session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"WINDOW_UPDATE to idle stream");
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream) {
|
|
return 0;
|
|
}
|
|
if (state_reserved_remote(session, stream)) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO, "WINDOW_UPADATE to reserved stream");
|
|
}
|
|
if (frame->window_update.window_size_increment == 0) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"WINDOW_UPDATE: window_size_increment == 0");
|
|
}
|
|
if (NGHTTP2_MAX_WINDOW_SIZE - frame->window_update.window_size_increment <
|
|
stream->remote_window_size) {
|
|
return session_handle_invalid_stream(session, frame,
|
|
NGHTTP2_ERR_FLOW_CONTROL);
|
|
}
|
|
stream->remote_window_size += frame->window_update.window_size_increment;
|
|
|
|
if (stream->remote_window_size > 0 &&
|
|
nghttp2_stream_check_deferred_by_flow_control(stream)) {
|
|
|
|
rv = session_resume_deferred_stream_item(
|
|
session, stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_window_update_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
if (frame->hd.stream_id == 0) {
|
|
return session_on_connection_window_update_received(session, frame);
|
|
} else {
|
|
return session_on_stream_window_update_received(session, frame);
|
|
}
|
|
}
|
|
|
|
static int session_process_window_update_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
nghttp2_frame_unpack_window_update_payload(&frame->window_update,
|
|
iframe->sbuf.pos);
|
|
|
|
return nghttp2_session_on_window_update_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_altsvc_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
nghttp2_ext_altsvc *altsvc;
|
|
nghttp2_stream *stream;
|
|
|
|
altsvc = frame->ext.payload;
|
|
|
|
/* session->server case has been excluded */
|
|
|
|
if (frame->hd.stream_id == 0) {
|
|
if (altsvc->origin_len == 0) {
|
|
return session_call_on_invalid_frame_recv_callback(session, frame,
|
|
NGHTTP2_ERR_PROTO);
|
|
}
|
|
} else {
|
|
if (altsvc->origin_len > 0) {
|
|
return session_call_on_invalid_frame_recv_callback(session, frame,
|
|
NGHTTP2_ERR_PROTO);
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream) {
|
|
return 0;
|
|
}
|
|
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (altsvc->field_value_len == 0) {
|
|
return session_call_on_invalid_frame_recv_callback(session, frame,
|
|
NGHTTP2_ERR_PROTO);
|
|
}
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_origin_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_priority_update_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
nghttp2_ext_priority_update *priority_update;
|
|
nghttp2_stream *stream;
|
|
nghttp2_priority_spec pri_spec;
|
|
nghttp2_extpri extpri;
|
|
int rv;
|
|
|
|
assert(session->server);
|
|
|
|
priority_update = frame->ext.payload;
|
|
|
|
if (frame->hd.stream_id != 0) {
|
|
return session_handle_invalid_connection(session, frame, NGHTTP2_ERR_PROTO,
|
|
"PRIORITY_UPDATE: stream_id == 0");
|
|
}
|
|
|
|
if (nghttp2_session_is_my_stream_id(session, priority_update->stream_id)) {
|
|
if (session_detect_idle_stream(session, priority_update->stream_id)) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"PRIORITY_UPDATE: prioritizing idle push is not allowed");
|
|
}
|
|
|
|
/* TODO Ignore priority signal to a push stream for now */
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream_raw(session, priority_update->stream_id);
|
|
if (stream) {
|
|
/* Stream already exists. */
|
|
} else if (session_detect_idle_stream(session, priority_update->stream_id)) {
|
|
if (session->num_idle_streams + session->num_incoming_streams >=
|
|
session->local_settings.max_concurrent_streams) {
|
|
return session_handle_invalid_connection(
|
|
session, frame, NGHTTP2_ERR_PROTO,
|
|
"PRIORITY_UPDATE: max concurrent streams exceeded");
|
|
}
|
|
|
|
nghttp2_priority_spec_default_init(&pri_spec);
|
|
stream = nghttp2_session_open_stream(session, priority_update->stream_id,
|
|
NGHTTP2_FLAG_NONE, &pri_spec,
|
|
NGHTTP2_STREAM_IDLE, NULL);
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else {
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
extpri.urgency = NGHTTP2_EXTPRI_DEFAULT_URGENCY;
|
|
extpri.inc = 0;
|
|
|
|
rv = nghttp2_http_parse_priority(&extpri, priority_update->field_value,
|
|
priority_update->field_value_len);
|
|
if (rv != 0) {
|
|
/* Just ignore field_value if it cannot be parsed. */
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
rv = session_update_stream_priority(session, stream,
|
|
nghttp2_extpri_to_uint8(&extpri));
|
|
if (rv != 0) {
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
static int session_process_altsvc_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
nghttp2_frame_unpack_altsvc_payload(
|
|
&frame->ext, nghttp2_get_uint16(iframe->sbuf.pos), iframe->lbuf.pos,
|
|
nghttp2_buf_len(&iframe->lbuf));
|
|
|
|
/* nghttp2_frame_unpack_altsvc_payload steals buffer from
|
|
iframe->lbuf */
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, NULL, 0);
|
|
|
|
return nghttp2_session_on_altsvc_received(session, frame);
|
|
}
|
|
|
|
static int session_process_origin_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
nghttp2_mem *mem = &session->mem;
|
|
int rv;
|
|
|
|
rv = nghttp2_frame_unpack_origin_payload(&frame->ext, iframe->lbuf.pos,
|
|
nghttp2_buf_len(&iframe->lbuf), mem);
|
|
if (rv != 0) {
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
/* Ignore ORIGIN frame which cannot be parsed. */
|
|
return 0;
|
|
}
|
|
|
|
return nghttp2_session_on_origin_received(session, frame);
|
|
}
|
|
|
|
static int session_process_priority_update_frame(nghttp2_session *session) {
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
nghttp2_frame_unpack_priority_update_payload(&frame->ext, iframe->sbuf.pos,
|
|
nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
return nghttp2_session_on_priority_update_received(session, frame);
|
|
}
|
|
|
|
static int session_process_extension_frame(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
|
|
rv = session_call_unpack_extension_callback(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
/* This handles the case where rv == NGHTTP2_ERR_CANCEL as well */
|
|
if (rv != 0) {
|
|
return 0;
|
|
}
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_data_received(nghttp2_session *session,
|
|
nghttp2_frame *frame) {
|
|
int rv = 0;
|
|
nghttp2_stream *stream;
|
|
|
|
/* We don't call on_frame_recv_callback if stream has been closed
|
|
already or being closed. */
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if (!stream || stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
/* This should be treated as stream error, but it results in lots
|
|
of RST_STREAM. So just ignore frame against nonexistent stream
|
|
for now. */
|
|
return 0;
|
|
}
|
|
|
|
if (session_enforce_http_messaging(session) &&
|
|
(frame->hd.flags & NGHTTP2_FLAG_END_STREAM)) {
|
|
if (nghttp2_http_on_remote_end_stream(stream) != 0) {
|
|
rv = nghttp2_session_add_rst_stream(session, stream->stream_id,
|
|
NGHTTP2_PROTOCOL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
/* Don't call nghttp2_session_close_stream_if_shut_rdwr because
|
|
RST_STREAM has been submitted. */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
rv = session_call_on_frame_received(session, frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
rv = nghttp2_session_close_stream_if_shut_rdwr(session, stream);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* For errors, this function only returns FATAL error. */
|
|
static int session_process_data_frame(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_frame *public_data_frame = &session->iframe.frame;
|
|
rv = nghttp2_session_on_data_received(session, public_data_frame);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Now we have SETTINGS synchronization, flow control error can be
|
|
* detected strictly. If DATA frame is received with length > 0 and
|
|
* current received window size + delta length is strictly larger than
|
|
* local window size, it is subject to FLOW_CONTROL_ERROR, so return
|
|
* -1. Note that local_window_size is calculated after SETTINGS ACK is
|
|
* received from peer, so peer must honor this limit. If the resulting
|
|
* recv_window_size is strictly larger than NGHTTP2_MAX_WINDOW_SIZE,
|
|
* return -1 too.
|
|
*/
|
|
static int adjust_recv_window_size(int32_t *recv_window_size_ptr, size_t delta,
|
|
int32_t local_window_size) {
|
|
if (*recv_window_size_ptr > local_window_size - (int32_t)delta ||
|
|
*recv_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - (int32_t)delta) {
|
|
return -1;
|
|
}
|
|
*recv_window_size_ptr += (int32_t)delta;
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_update_recv_stream_window_size(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
size_t delta_size,
|
|
int send_window_update) {
|
|
int rv;
|
|
rv = adjust_recv_window_size(&stream->recv_window_size, delta_size,
|
|
stream->local_window_size);
|
|
if (rv != 0) {
|
|
return nghttp2_session_add_rst_stream(session, stream->stream_id,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
/* We don't have to send WINDOW_UPDATE if the data received is the
|
|
last chunk in the incoming stream. */
|
|
/* We have to use local_settings here because it is the constraint
|
|
the remote endpoint should honor. */
|
|
if (send_window_update &&
|
|
!(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) &&
|
|
stream->window_update_queued == 0 &&
|
|
nghttp2_should_send_window_update(stream->local_window_size,
|
|
stream->recv_window_size)) {
|
|
rv = nghttp2_session_add_window_update(session, NGHTTP2_FLAG_NONE,
|
|
stream->stream_id,
|
|
stream->recv_window_size);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
stream->recv_window_size = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_update_recv_connection_window_size(nghttp2_session *session,
|
|
size_t delta_size) {
|
|
int rv;
|
|
rv = adjust_recv_window_size(&session->recv_window_size, delta_size,
|
|
session->local_window_size);
|
|
if (rv != 0) {
|
|
return nghttp2_session_terminate_session(session,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
if (!(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) &&
|
|
session->window_update_queued == 0 &&
|
|
nghttp2_should_send_window_update(session->local_window_size,
|
|
session->recv_window_size)) {
|
|
/* Use stream ID 0 to update connection-level flow control
|
|
window */
|
|
rv = nghttp2_session_add_window_update(session, NGHTTP2_FLAG_NONE, 0,
|
|
session->recv_window_size);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
session->recv_window_size = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_update_consumed_size(nghttp2_session *session,
|
|
int32_t *consumed_size_ptr,
|
|
int32_t *recv_window_size_ptr,
|
|
uint8_t window_update_queued,
|
|
int32_t stream_id, size_t delta_size,
|
|
int32_t local_window_size) {
|
|
int32_t recv_size;
|
|
int rv;
|
|
|
|
if ((size_t)*consumed_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta_size) {
|
|
return nghttp2_session_terminate_session(session,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
|
|
*consumed_size_ptr += (int32_t)delta_size;
|
|
|
|
if (window_update_queued == 0) {
|
|
/* recv_window_size may be smaller than consumed_size, because it
|
|
may be decreased by negative value with
|
|
nghttp2_submit_window_update(). */
|
|
recv_size = nghttp2_min(*consumed_size_ptr, *recv_window_size_ptr);
|
|
|
|
if (nghttp2_should_send_window_update(local_window_size, recv_size)) {
|
|
rv = nghttp2_session_add_window_update(session, NGHTTP2_FLAG_NONE,
|
|
stream_id, recv_size);
|
|
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
*recv_window_size_ptr -= recv_size;
|
|
*consumed_size_ptr -= recv_size;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int session_update_stream_consumed_size(nghttp2_session *session,
|
|
nghttp2_stream *stream,
|
|
size_t delta_size) {
|
|
return session_update_consumed_size(
|
|
session, &stream->consumed_size, &stream->recv_window_size,
|
|
stream->window_update_queued, stream->stream_id, delta_size,
|
|
stream->local_window_size);
|
|
}
|
|
|
|
static int session_update_connection_consumed_size(nghttp2_session *session,
|
|
size_t delta_size) {
|
|
return session_update_consumed_size(
|
|
session, &session->consumed_size, &session->recv_window_size,
|
|
session->window_update_queued, 0, delta_size, session->local_window_size);
|
|
}
|
|
|
|
/*
|
|
* Checks that we can receive the DATA frame for stream, which is
|
|
* indicated by |session->iframe.frame.hd.stream_id|. If it is a
|
|
* connection error situation, GOAWAY frame will be issued by this
|
|
* function.
|
|
*
|
|
* If the DATA frame is allowed, returns 0.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* NGHTTP2_ERR_IGN_PAYLOAD
|
|
* The reception of DATA frame is connection error; or should be
|
|
* ignored.
|
|
* NGHTTP2_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
static int session_on_data_received_fail_fast(nghttp2_session *session) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_inbound_frame *iframe;
|
|
int32_t stream_id;
|
|
const char *failure_reason;
|
|
uint32_t error_code = NGHTTP2_PROTOCOL_ERROR;
|
|
|
|
iframe = &session->iframe;
|
|
stream_id = iframe->frame.hd.stream_id;
|
|
|
|
if (stream_id == 0) {
|
|
/* The spec says that if a DATA frame is received whose stream ID
|
|
is 0, the recipient MUST respond with a connection error of
|
|
type PROTOCOL_ERROR. */
|
|
failure_reason = "DATA: stream_id == 0";
|
|
goto fail;
|
|
}
|
|
|
|
if (session_detect_idle_stream(session, stream_id)) {
|
|
failure_reason = "DATA: stream in idle";
|
|
error_code = NGHTTP2_PROTOCOL_ERROR;
|
|
goto fail;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (!stream) {
|
|
stream = nghttp2_session_get_stream_raw(session, stream_id);
|
|
if (stream && (stream->shut_flags & NGHTTP2_SHUT_RD)) {
|
|
failure_reason = "DATA: stream closed";
|
|
error_code = NGHTTP2_STREAM_CLOSED;
|
|
goto fail;
|
|
}
|
|
|
|
return NGHTTP2_ERR_IGN_PAYLOAD;
|
|
}
|
|
if (stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
failure_reason = "DATA: stream in half-closed(remote)";
|
|
error_code = NGHTTP2_STREAM_CLOSED;
|
|
goto fail;
|
|
}
|
|
|
|
if (nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_IGN_PAYLOAD;
|
|
}
|
|
if (stream->state != NGHTTP2_STREAM_OPENED) {
|
|
failure_reason = "DATA: stream not opened";
|
|
goto fail;
|
|
}
|
|
return 0;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
failure_reason = "DATA: stream in reserved";
|
|
goto fail;
|
|
}
|
|
if (stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_IGN_PAYLOAD;
|
|
}
|
|
return 0;
|
|
fail:
|
|
rv = nghttp2_session_terminate_session_with_reason(session, error_code,
|
|
failure_reason);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_IGN_PAYLOAD;
|
|
}
|
|
|
|
static size_t inbound_frame_payload_readlen(nghttp2_inbound_frame *iframe,
|
|
const uint8_t *in,
|
|
const uint8_t *last) {
|
|
return nghttp2_min((size_t)(last - in), iframe->payloadleft);
|
|
}
|
|
|
|
/*
|
|
* Resets iframe->sbuf and advance its mark pointer by |left| bytes.
|
|
*/
|
|
static void inbound_frame_set_mark(nghttp2_inbound_frame *iframe, size_t left) {
|
|
nghttp2_buf_reset(&iframe->sbuf);
|
|
iframe->sbuf.mark += left;
|
|
}
|
|
|
|
static size_t inbound_frame_buf_read(nghttp2_inbound_frame *iframe,
|
|
const uint8_t *in, const uint8_t *last) {
|
|
size_t readlen;
|
|
|
|
readlen =
|
|
nghttp2_min((size_t)(last - in), nghttp2_buf_mark_avail(&iframe->sbuf));
|
|
|
|
iframe->sbuf.last = nghttp2_cpymem(iframe->sbuf.last, in, readlen);
|
|
|
|
return readlen;
|
|
}
|
|
|
|
/*
|
|
* Unpacks SETTINGS entry in iframe->sbuf.
|
|
*/
|
|
static void inbound_frame_set_settings_entry(nghttp2_inbound_frame *iframe) {
|
|
nghttp2_settings_entry iv;
|
|
nghttp2_settings_entry *min_header_table_size_entry;
|
|
size_t i;
|
|
|
|
nghttp2_frame_unpack_settings_entry(&iv, iframe->sbuf.pos);
|
|
|
|
switch (iv.settings_id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
case NGHTTP2_SETTINGS_ENABLE_PUSH:
|
|
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
|
|
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
|
|
case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
|
|
case NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES:
|
|
break;
|
|
default:
|
|
DEBUGF("recv: unknown settings id=0x%02x\n", iv.settings_id);
|
|
|
|
iframe->iv[iframe->niv++] = iv;
|
|
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < iframe->niv; ++i) {
|
|
if (iframe->iv[i].settings_id == iv.settings_id) {
|
|
iframe->iv[i] = iv;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == iframe->niv) {
|
|
iframe->iv[iframe->niv++] = iv;
|
|
}
|
|
|
|
if (iv.settings_id == NGHTTP2_SETTINGS_HEADER_TABLE_SIZE) {
|
|
/* Keep track of minimum value of SETTINGS_HEADER_TABLE_SIZE */
|
|
min_header_table_size_entry = &iframe->iv[iframe->max_niv - 1];
|
|
|
|
if (iv.value < min_header_table_size_entry->value) {
|
|
min_header_table_size_entry->value = iv.value;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Checks PADDED flags and set iframe->sbuf to read them accordingly.
|
|
* If padding is set, this function returns 1. If no padding is set,
|
|
* this function returns 0. On error, returns -1.
|
|
*/
|
|
static int inbound_frame_handle_pad(nghttp2_inbound_frame *iframe,
|
|
nghttp2_frame_hd *hd) {
|
|
if (hd->flags & NGHTTP2_FLAG_PADDED) {
|
|
if (hd->length < 1) {
|
|
return -1;
|
|
}
|
|
inbound_frame_set_mark(iframe, 1);
|
|
return 1;
|
|
}
|
|
DEBUGF("recv: no padding in payload\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Computes number of padding based on flags. This function returns
|
|
* the calculated length if it succeeds, or -1.
|
|
*/
|
|
static ssize_t inbound_frame_compute_pad(nghttp2_inbound_frame *iframe) {
|
|
size_t padlen;
|
|
|
|
/* 1 for Pad Length field */
|
|
padlen = (size_t)(iframe->sbuf.pos[0] + 1);
|
|
|
|
DEBUGF("recv: padlen=%zu\n", padlen);
|
|
|
|
/* We cannot use iframe->frame.hd.length because of CONTINUATION */
|
|
if (padlen - 1 > iframe->payloadleft) {
|
|
return -1;
|
|
}
|
|
|
|
iframe->padlen = padlen;
|
|
|
|
return (ssize_t)padlen;
|
|
}
|
|
|
|
/*
|
|
* This function returns the effective payload length in the data of
|
|
* length |readlen| when the remaining payload is |payloadleft|. The
|
|
* |payloadleft| does not include |readlen|. If padding was started
|
|
* strictly before this data chunk, this function returns -1.
|
|
*/
|
|
static ssize_t inbound_frame_effective_readlen(nghttp2_inbound_frame *iframe,
|
|
size_t payloadleft,
|
|
size_t readlen) {
|
|
size_t trail_padlen =
|
|
nghttp2_frame_trail_padlen(&iframe->frame, iframe->padlen);
|
|
|
|
if (trail_padlen > payloadleft) {
|
|
size_t padlen;
|
|
padlen = trail_padlen - payloadleft;
|
|
if (readlen < padlen) {
|
|
return -1;
|
|
}
|
|
return (ssize_t)(readlen - padlen);
|
|
}
|
|
return (ssize_t)(readlen);
|
|
}
|
|
|
|
static const uint8_t static_in[] = {0};
|
|
|
|
ssize_t nghttp2_session_mem_recv(nghttp2_session *session, const uint8_t *in,
|
|
size_t inlen) {
|
|
const uint8_t *first, *last;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
size_t readlen;
|
|
ssize_t padlen;
|
|
int rv;
|
|
int busy = 0;
|
|
nghttp2_frame_hd cont_hd;
|
|
nghttp2_stream *stream;
|
|
size_t pri_fieldlen;
|
|
nghttp2_mem *mem;
|
|
|
|
if (in == NULL) {
|
|
assert(inlen == 0);
|
|
in = static_in;
|
|
}
|
|
|
|
first = in;
|
|
last = in + inlen;
|
|
|
|
DEBUGF("recv: connection recv_window_size=%d, local_window=%d\n",
|
|
session->recv_window_size, session->local_window_size);
|
|
|
|
mem = &session->mem;
|
|
|
|
/* We may have idle streams more than we expect (e.g.,
|
|
nghttp2_session_change_stream_priority() or
|
|
nghttp2_session_create_idle_stream()). Adjust them here. */
|
|
rv = nghttp2_session_adjust_idle_stream(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (!nghttp2_session_want_read(session)) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
for (;;) {
|
|
switch (iframe->state) {
|
|
case NGHTTP2_IB_READ_CLIENT_MAGIC:
|
|
readlen = nghttp2_min(inlen, iframe->payloadleft);
|
|
|
|
if (memcmp(&NGHTTP2_CLIENT_MAGIC[NGHTTP2_CLIENT_MAGIC_LEN -
|
|
iframe->payloadleft],
|
|
in, readlen) != 0) {
|
|
return NGHTTP2_ERR_BAD_CLIENT_MAGIC;
|
|
}
|
|
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
if (iframe->payloadleft == 0) {
|
|
session_inbound_frame_reset(session);
|
|
iframe->state = NGHTTP2_IB_READ_FIRST_SETTINGS;
|
|
}
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_FIRST_SETTINGS:
|
|
DEBUGF("recv: [IB_READ_FIRST_SETTINGS]\n");
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
|
|
if (nghttp2_buf_mark_avail(&iframe->sbuf)) {
|
|
return in - first;
|
|
}
|
|
|
|
if (iframe->sbuf.pos[3] != NGHTTP2_SETTINGS ||
|
|
(iframe->sbuf.pos[4] & NGHTTP2_FLAG_ACK)) {
|
|
rv = session_call_error_callback(
|
|
session, NGHTTP2_ERR_SETTINGS_EXPECTED,
|
|
"Remote peer returned unexpected data while we expected "
|
|
"SETTINGS frame. Perhaps, peer does not support HTTP/2 "
|
|
"properly.");
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "SETTINGS expected");
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_HEAD;
|
|
|
|
/* Fall through */
|
|
case NGHTTP2_IB_READ_HEAD: {
|
|
int on_begin_frame_called = 0;
|
|
|
|
DEBUGF("recv: [IB_READ_HEAD]\n");
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
|
|
if (nghttp2_buf_mark_avail(&iframe->sbuf)) {
|
|
return in - first;
|
|
}
|
|
|
|
nghttp2_frame_unpack_frame_hd(&iframe->frame.hd, iframe->sbuf.pos);
|
|
iframe->payloadleft = iframe->frame.hd.length;
|
|
|
|
DEBUGF("recv: payloadlen=%zu, type=%u, flags=0x%02x, stream_id=%d\n",
|
|
iframe->frame.hd.length, iframe->frame.hd.type,
|
|
iframe->frame.hd.flags, iframe->frame.hd.stream_id);
|
|
|
|
if (iframe->frame.hd.length > session->local_settings.max_frame_size) {
|
|
DEBUGF("recv: length is too large %zu > %u\n", iframe->frame.hd.length,
|
|
session->local_settings.max_frame_size);
|
|
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_FRAME_SIZE_ERROR, "too large frame size");
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
switch (iframe->frame.hd.type) {
|
|
case NGHTTP2_DATA: {
|
|
DEBUGF("recv: DATA\n");
|
|
|
|
iframe->frame.hd.flags &=
|
|
(NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_PADDED);
|
|
/* Check stream is open. If it is not open or closing,
|
|
ignore payload. */
|
|
busy = 1;
|
|
|
|
rv = session_on_data_received_fail_fast(session);
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
if (rv == NGHTTP2_ERR_IGN_PAYLOAD) {
|
|
DEBUGF("recv: DATA not allowed stream_id=%d\n",
|
|
iframe->frame.hd.stream_id);
|
|
iframe->state = NGHTTP2_IB_IGN_DATA;
|
|
break;
|
|
}
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = inbound_frame_handle_pad(iframe, &iframe->frame.hd);
|
|
if (rv < 0) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR,
|
|
"DATA: insufficient padding space");
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == 1) {
|
|
iframe->state = NGHTTP2_IB_READ_PAD_DATA;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_DATA;
|
|
break;
|
|
}
|
|
case NGHTTP2_HEADERS:
|
|
|
|
DEBUGF("recv: HEADERS\n");
|
|
|
|
iframe->frame.hd.flags &=
|
|
(NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_END_HEADERS |
|
|
NGHTTP2_FLAG_PADDED | NGHTTP2_FLAG_PRIORITY);
|
|
|
|
rv = inbound_frame_handle_pad(iframe, &iframe->frame.hd);
|
|
if (rv < 0) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR,
|
|
"HEADERS: insufficient padding space");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == 1) {
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
break;
|
|
}
|
|
|
|
pri_fieldlen = nghttp2_frame_priority_len(iframe->frame.hd.flags);
|
|
|
|
if (pri_fieldlen > 0) {
|
|
if (iframe->payloadleft < pri_fieldlen) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
|
|
inbound_frame_set_mark(iframe, pri_fieldlen);
|
|
|
|
break;
|
|
}
|
|
|
|
/* Call on_begin_frame_callback here because
|
|
session_process_headers_frame() may call
|
|
on_begin_headers_callback */
|
|
rv = session_call_on_begin_frame(session, &iframe->frame.hd);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
on_begin_frame_called = 1;
|
|
|
|
rv = session_process_headers_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, iframe->frame.hd.stream_id, NGHTTP2_INTERNAL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_IGN_HEADER_BLOCK) {
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_HEADER_BLOCK;
|
|
|
|
break;
|
|
case NGHTTP2_PRIORITY:
|
|
DEBUGF("recv: PRIORITY\n");
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
|
|
if (iframe->payloadleft != NGHTTP2_PRIORITY_SPECLEN) {
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
|
|
inbound_frame_set_mark(iframe, NGHTTP2_PRIORITY_SPECLEN);
|
|
|
|
break;
|
|
case NGHTTP2_RST_STREAM:
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
#ifdef DEBUGBUILD
|
|
switch (iframe->frame.hd.type) {
|
|
case NGHTTP2_RST_STREAM:
|
|
DEBUGF("recv: RST_STREAM\n");
|
|
break;
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
DEBUGF("recv: WINDOW_UPDATE\n");
|
|
break;
|
|
}
|
|
#endif /* DEBUGBUILD */
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
|
|
if (iframe->payloadleft != 4) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
|
|
inbound_frame_set_mark(iframe, 4);
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS:
|
|
DEBUGF("recv: SETTINGS\n");
|
|
|
|
iframe->frame.hd.flags &= NGHTTP2_FLAG_ACK;
|
|
|
|
if ((iframe->frame.hd.length % NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH) ||
|
|
((iframe->frame.hd.flags & NGHTTP2_FLAG_ACK) &&
|
|
iframe->payloadleft > 0)) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
/* Check the settings flood counter early to be safe */
|
|
if (session->obq_flood_counter_ >= session->max_outbound_ack &&
|
|
!(iframe->frame.hd.flags & NGHTTP2_FLAG_ACK)) {
|
|
return NGHTTP2_ERR_FLOODED;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_SETTINGS;
|
|
|
|
if (iframe->payloadleft) {
|
|
nghttp2_settings_entry *min_header_table_size_entry;
|
|
|
|
/* We allocate iv with additional one entry, to store the
|
|
minimum header table size. */
|
|
iframe->max_niv =
|
|
iframe->frame.hd.length / NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH + 1;
|
|
|
|
if (iframe->max_niv - 1 > session->max_settings) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_ENHANCE_YOUR_CALM,
|
|
"SETTINGS: too many setting entries");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
iframe->iv = nghttp2_mem_malloc(mem, sizeof(nghttp2_settings_entry) *
|
|
iframe->max_niv);
|
|
|
|
if (!iframe->iv) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
min_header_table_size_entry = &iframe->iv[iframe->max_niv - 1];
|
|
min_header_table_size_entry->settings_id =
|
|
NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
|
|
min_header_table_size_entry->value = UINT32_MAX;
|
|
|
|
inbound_frame_set_mark(iframe, NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH);
|
|
break;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
inbound_frame_set_mark(iframe, 0);
|
|
|
|
break;
|
|
case NGHTTP2_PUSH_PROMISE:
|
|
DEBUGF("recv: PUSH_PROMISE\n");
|
|
|
|
iframe->frame.hd.flags &=
|
|
(NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PADDED);
|
|
|
|
rv = inbound_frame_handle_pad(iframe, &iframe->frame.hd);
|
|
if (rv < 0) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: insufficient padding space");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == 1) {
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
break;
|
|
}
|
|
|
|
if (iframe->payloadleft < 4) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
|
|
inbound_frame_set_mark(iframe, 4);
|
|
|
|
break;
|
|
case NGHTTP2_PING:
|
|
DEBUGF("recv: PING\n");
|
|
|
|
iframe->frame.hd.flags &= NGHTTP2_FLAG_ACK;
|
|
|
|
if (iframe->payloadleft != 8) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
inbound_frame_set_mark(iframe, 8);
|
|
|
|
break;
|
|
case NGHTTP2_GOAWAY:
|
|
DEBUGF("recv: GOAWAY\n");
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
|
|
if (iframe->payloadleft < 8) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
inbound_frame_set_mark(iframe, 8);
|
|
|
|
break;
|
|
case NGHTTP2_CONTINUATION:
|
|
DEBUGF("recv: unexpected CONTINUATION\n");
|
|
|
|
/* Receiving CONTINUATION in this state are subject to
|
|
connection error of type PROTOCOL_ERROR */
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "CONTINUATION: unexpected");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return (ssize_t)inlen;
|
|
default:
|
|
DEBUGF("recv: extension frame\n");
|
|
|
|
if (check_ext_type_set(session->user_recv_ext_types,
|
|
iframe->frame.hd.type)) {
|
|
if (!session->callbacks.unpack_extension_callback) {
|
|
/* Silently ignore unknown frame type. */
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_EXTENSION_PAYLOAD;
|
|
|
|
break;
|
|
} else {
|
|
switch (iframe->frame.hd.type) {
|
|
case NGHTTP2_ALTSVC:
|
|
if ((session->builtin_recv_ext_types & NGHTTP2_TYPEMASK_ALTSVC) ==
|
|
0) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
DEBUGF("recv: ALTSVC\n");
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
iframe->frame.ext.payload = &iframe->ext_frame_payload.altsvc;
|
|
|
|
if (session->server) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
if (iframe->payloadleft < 2) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
inbound_frame_set_mark(iframe, 2);
|
|
|
|
break;
|
|
case NGHTTP2_ORIGIN:
|
|
if (!(session->builtin_recv_ext_types & NGHTTP2_TYPEMASK_ORIGIN)) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
DEBUGF("recv: ORIGIN\n");
|
|
|
|
iframe->frame.ext.payload = &iframe->ext_frame_payload.origin;
|
|
|
|
if (session->server || iframe->frame.hd.stream_id ||
|
|
(iframe->frame.hd.flags & 0xf0)) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
|
|
if (iframe->payloadleft) {
|
|
iframe->raw_lbuf = nghttp2_mem_malloc(mem, iframe->payloadleft);
|
|
|
|
if (iframe->raw_lbuf == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, iframe->raw_lbuf,
|
|
iframe->payloadleft);
|
|
} else {
|
|
busy = 1;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_ORIGIN_PAYLOAD;
|
|
|
|
break;
|
|
case NGHTTP2_PRIORITY_UPDATE:
|
|
if ((session->builtin_recv_ext_types &
|
|
NGHTTP2_TYPEMASK_PRIORITY_UPDATE) == 0) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
DEBUGF("recv: PRIORITY_UPDATE\n");
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
iframe->frame.ext.payload =
|
|
&iframe->ext_frame_payload.priority_update;
|
|
|
|
if (!session->server) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR,
|
|
"PRIORITY_UPDATE is received from server");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (iframe->payloadleft < 4) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
if (!session_no_rfc7540_pri_no_fallback(session) ||
|
|
iframe->payloadleft > sizeof(iframe->raw_sbuf)) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
inbound_frame_set_mark(iframe, iframe->payloadleft);
|
|
|
|
break;
|
|
default:
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!on_begin_frame_called) {
|
|
switch (iframe->state) {
|
|
case NGHTTP2_IB_IGN_HEADER_BLOCK:
|
|
case NGHTTP2_IB_IGN_PAYLOAD:
|
|
case NGHTTP2_IB_FRAME_SIZE_ERROR:
|
|
case NGHTTP2_IB_IGN_DATA:
|
|
case NGHTTP2_IB_IGN_ALL:
|
|
break;
|
|
default:
|
|
rv = session_call_on_begin_frame(session, &iframe->frame.hd);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
case NGHTTP2_IB_READ_NBYTE:
|
|
DEBUGF("recv: [IB_READ_NBYTE]\n");
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
iframe->payloadleft -= readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu, left=%zd\n", readlen,
|
|
iframe->payloadleft, nghttp2_buf_mark_avail(&iframe->sbuf));
|
|
|
|
if (nghttp2_buf_mark_avail(&iframe->sbuf)) {
|
|
return in - first;
|
|
}
|
|
|
|
switch (iframe->frame.hd.type) {
|
|
case NGHTTP2_HEADERS:
|
|
if (iframe->padlen == 0 &&
|
|
(iframe->frame.hd.flags & NGHTTP2_FLAG_PADDED)) {
|
|
pri_fieldlen = nghttp2_frame_priority_len(iframe->frame.hd.flags);
|
|
padlen = inbound_frame_compute_pad(iframe);
|
|
if (padlen < 0 ||
|
|
(size_t)padlen + pri_fieldlen > 1 + iframe->payloadleft) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "HEADERS: invalid padding");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
iframe->frame.headers.padlen = (size_t)padlen;
|
|
|
|
if (pri_fieldlen > 0) {
|
|
if (iframe->payloadleft < pri_fieldlen) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
inbound_frame_set_mark(iframe, pri_fieldlen);
|
|
break;
|
|
} else {
|
|
/* Truncate buffers used for padding spec */
|
|
inbound_frame_set_mark(iframe, 0);
|
|
}
|
|
}
|
|
|
|
rv = session_process_headers_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, iframe->frame.hd.stream_id, NGHTTP2_INTERNAL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_IGN_HEADER_BLOCK) {
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_HEADER_BLOCK;
|
|
|
|
break;
|
|
case NGHTTP2_PRIORITY:
|
|
if (!session_no_rfc7540_pri_no_fallback(session) &&
|
|
session->remote_settings.no_rfc7540_priorities != 1) {
|
|
rv = session_process_priority_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_RST_STREAM:
|
|
rv = session_process_rst_stream_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_PUSH_PROMISE:
|
|
if (iframe->padlen == 0 &&
|
|
(iframe->frame.hd.flags & NGHTTP2_FLAG_PADDED)) {
|
|
padlen = inbound_frame_compute_pad(iframe);
|
|
if (padlen < 0 || (size_t)padlen + 4 /* promised stream id */
|
|
> 1 + iframe->payloadleft) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: invalid padding");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
iframe->frame.push_promise.padlen = (size_t)padlen;
|
|
|
|
if (iframe->payloadleft < 4) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
|
|
inbound_frame_set_mark(iframe, 4);
|
|
|
|
break;
|
|
}
|
|
|
|
rv = session_process_push_promise_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, iframe->frame.push_promise.promised_stream_id,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_IGN_HEADER_BLOCK) {
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_HEADER_BLOCK;
|
|
|
|
break;
|
|
case NGHTTP2_PING:
|
|
rv = session_process_ping_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_GOAWAY: {
|
|
size_t debuglen;
|
|
|
|
/* 8 is Last-stream-ID + Error Code */
|
|
debuglen = iframe->frame.hd.length - 8;
|
|
|
|
if (debuglen > 0) {
|
|
iframe->raw_lbuf = nghttp2_mem_malloc(mem, debuglen);
|
|
|
|
if (iframe->raw_lbuf == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, iframe->raw_lbuf, debuglen);
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_GOAWAY_DEBUG;
|
|
|
|
break;
|
|
}
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
rv = session_process_window_update_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_ALTSVC: {
|
|
size_t origin_len;
|
|
|
|
origin_len = nghttp2_get_uint16(iframe->sbuf.pos);
|
|
|
|
DEBUGF("recv: origin_len=%zu\n", origin_len);
|
|
|
|
if (origin_len > iframe->payloadleft) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
break;
|
|
}
|
|
|
|
if (iframe->frame.hd.length > 2) {
|
|
iframe->raw_lbuf =
|
|
nghttp2_mem_malloc(mem, iframe->frame.hd.length - 2);
|
|
|
|
if (iframe->raw_lbuf == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, iframe->raw_lbuf,
|
|
iframe->frame.hd.length);
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_ALTSVC_PAYLOAD;
|
|
|
|
break;
|
|
case NGHTTP2_PRIORITY_UPDATE:
|
|
DEBUGF("recv: prioritized_stream_id=%d\n",
|
|
nghttp2_get_uint32(iframe->sbuf.pos) & NGHTTP2_STREAM_ID_MASK);
|
|
|
|
rv = session_process_priority_update_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
/* This is unknown frame */
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
}
|
|
break;
|
|
case NGHTTP2_IB_READ_HEADER_BLOCK:
|
|
case NGHTTP2_IB_IGN_HEADER_BLOCK: {
|
|
ssize_t data_readlen;
|
|
size_t trail_padlen;
|
|
int final;
|
|
#ifdef DEBUGBUILD
|
|
if (iframe->state == NGHTTP2_IB_READ_HEADER_BLOCK) {
|
|
DEBUGF("recv: [IB_READ_HEADER_BLOCK]\n");
|
|
} else {
|
|
DEBUGF("recv: [IB_IGN_HEADER_BLOCK]\n");
|
|
}
|
|
#endif /* DEBUGBUILD */
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft - readlen);
|
|
|
|
data_readlen = inbound_frame_effective_readlen(
|
|
iframe, iframe->payloadleft - readlen, readlen);
|
|
|
|
if (data_readlen == -1) {
|
|
/* everything is padding */
|
|
data_readlen = 0;
|
|
}
|
|
|
|
trail_padlen = nghttp2_frame_trail_padlen(&iframe->frame, iframe->padlen);
|
|
|
|
final = (iframe->frame.hd.flags & NGHTTP2_FLAG_END_HEADERS) &&
|
|
iframe->payloadleft - (size_t)data_readlen == trail_padlen;
|
|
|
|
if (data_readlen > 0 || (data_readlen == 0 && final)) {
|
|
size_t hd_proclen = 0;
|
|
|
|
DEBUGF("recv: block final=%d\n", final);
|
|
|
|
rv =
|
|
inflate_header_block(session, &iframe->frame, &hd_proclen,
|
|
(uint8_t *)in, (size_t)data_readlen, final,
|
|
iframe->state == NGHTTP2_IB_READ_HEADER_BLOCK);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_PAUSE) {
|
|
in += hd_proclen;
|
|
iframe->payloadleft -= hd_proclen;
|
|
|
|
return in - first;
|
|
}
|
|
|
|
if (rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
/* The application says no more headers. We decompress the
|
|
rest of the header block but not invoke on_header_callback
|
|
and on_frame_recv_callback. */
|
|
in += hd_proclen;
|
|
iframe->payloadleft -= hd_proclen;
|
|
|
|
/* Use promised stream ID for PUSH_PROMISE */
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session,
|
|
iframe->frame.hd.type == NGHTTP2_PUSH_PROMISE
|
|
? iframe->frame.push_promise.promised_stream_id
|
|
: iframe->frame.hd.stream_id,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
break;
|
|
}
|
|
|
|
in += readlen;
|
|
iframe->payloadleft -= readlen;
|
|
|
|
if (rv == NGHTTP2_ERR_HEADER_COMP) {
|
|
/* GOAWAY is already issued */
|
|
if (iframe->payloadleft == 0) {
|
|
session_inbound_frame_reset(session);
|
|
} else {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
in += readlen;
|
|
iframe->payloadleft -= readlen;
|
|
}
|
|
|
|
if (iframe->payloadleft) {
|
|
break;
|
|
}
|
|
|
|
if ((iframe->frame.hd.flags & NGHTTP2_FLAG_END_HEADERS) == 0) {
|
|
|
|
inbound_frame_set_mark(iframe, NGHTTP2_FRAME_HDLEN);
|
|
|
|
iframe->padlen = 0;
|
|
|
|
if (iframe->state == NGHTTP2_IB_READ_HEADER_BLOCK) {
|
|
iframe->state = NGHTTP2_IB_EXPECT_CONTINUATION;
|
|
} else {
|
|
iframe->state = NGHTTP2_IB_IGN_CONTINUATION;
|
|
}
|
|
} else {
|
|
if (iframe->state == NGHTTP2_IB_READ_HEADER_BLOCK) {
|
|
rv = session_after_header_block_received(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
session_inbound_frame_reset(session);
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_IB_IGN_PAYLOAD:
|
|
DEBUGF("recv: [IB_IGN_PAYLOAD]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (iframe->payloadleft) {
|
|
break;
|
|
}
|
|
|
|
switch (iframe->frame.hd.type) {
|
|
case NGHTTP2_HEADERS:
|
|
case NGHTTP2_PUSH_PROMISE:
|
|
case NGHTTP2_CONTINUATION:
|
|
/* Mark inflater bad so that we won't perform further decoding */
|
|
session->hd_inflater.ctx.bad = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_FRAME_SIZE_ERROR:
|
|
DEBUGF("recv: [IB_FRAME_SIZE_ERROR]\n");
|
|
|
|
rv = session_handle_frame_size_error(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
assert(iframe->state == NGHTTP2_IB_IGN_ALL);
|
|
|
|
return (ssize_t)inlen;
|
|
case NGHTTP2_IB_READ_SETTINGS:
|
|
DEBUGF("recv: [IB_READ_SETTINGS]\n");
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (nghttp2_buf_mark_avail(&iframe->sbuf)) {
|
|
break;
|
|
}
|
|
|
|
if (readlen > 0) {
|
|
inbound_frame_set_settings_entry(iframe);
|
|
}
|
|
if (iframe->payloadleft) {
|
|
inbound_frame_set_mark(iframe, NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH);
|
|
break;
|
|
}
|
|
|
|
rv = session_process_settings_frame(session);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_GOAWAY_DEBUG:
|
|
DEBUGF("recv: [IB_READ_GOAWAY_DEBUG]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
|
|
if (readlen > 0) {
|
|
iframe->lbuf.last = nghttp2_cpymem(iframe->lbuf.last, in, readlen);
|
|
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
}
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (iframe->payloadleft) {
|
|
assert(nghttp2_buf_avail(&iframe->lbuf) > 0);
|
|
|
|
break;
|
|
}
|
|
|
|
rv = session_process_goaway_frame(session);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_EXPECT_CONTINUATION:
|
|
case NGHTTP2_IB_IGN_CONTINUATION:
|
|
#ifdef DEBUGBUILD
|
|
if (iframe->state == NGHTTP2_IB_EXPECT_CONTINUATION) {
|
|
fprintf(stderr, "recv: [IB_EXPECT_CONTINUATION]\n");
|
|
} else {
|
|
fprintf(stderr, "recv: [IB_IGN_CONTINUATION]\n");
|
|
}
|
|
#endif /* DEBUGBUILD */
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
|
|
if (nghttp2_buf_mark_avail(&iframe->sbuf)) {
|
|
return in - first;
|
|
}
|
|
|
|
nghttp2_frame_unpack_frame_hd(&cont_hd, iframe->sbuf.pos);
|
|
iframe->payloadleft = cont_hd.length;
|
|
|
|
DEBUGF("recv: payloadlen=%zu, type=%u, flags=0x%02x, stream_id=%d\n",
|
|
cont_hd.length, cont_hd.type, cont_hd.flags, cont_hd.stream_id);
|
|
|
|
if (cont_hd.type != NGHTTP2_CONTINUATION ||
|
|
cont_hd.stream_id != iframe->frame.hd.stream_id) {
|
|
DEBUGF("recv: expected stream_id=%d, type=%d, but got stream_id=%d, "
|
|
"type=%u\n",
|
|
iframe->frame.hd.stream_id, NGHTTP2_CONTINUATION,
|
|
cont_hd.stream_id, cont_hd.type);
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR,
|
|
"unexpected non-CONTINUATION frame or stream_id is invalid");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
/* CONTINUATION won't bear NGHTTP2_PADDED flag */
|
|
|
|
iframe->frame.hd.flags =
|
|
(uint8_t)(iframe->frame.hd.flags |
|
|
(cont_hd.flags & NGHTTP2_FLAG_END_HEADERS));
|
|
iframe->frame.hd.length += cont_hd.length;
|
|
|
|
busy = 1;
|
|
|
|
if (iframe->state == NGHTTP2_IB_EXPECT_CONTINUATION) {
|
|
iframe->state = NGHTTP2_IB_READ_HEADER_BLOCK;
|
|
|
|
rv = session_call_on_begin_frame(session, &cont_hd);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
} else {
|
|
iframe->state = NGHTTP2_IB_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_PAD_DATA:
|
|
DEBUGF("recv: [IB_READ_PAD_DATA]\n");
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
iframe->payloadleft -= readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu, left=%zu\n", readlen,
|
|
iframe->payloadleft, nghttp2_buf_mark_avail(&iframe->sbuf));
|
|
|
|
if (nghttp2_buf_mark_avail(&iframe->sbuf)) {
|
|
return in - first;
|
|
}
|
|
|
|
/* Pad Length field is subject to flow control */
|
|
rv = nghttp2_session_update_recv_connection_window_size(session, readlen);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
/* Pad Length field is consumed immediately */
|
|
rv =
|
|
nghttp2_session_consume(session, iframe->frame.hd.stream_id, readlen);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, iframe->frame.hd.stream_id);
|
|
if (stream) {
|
|
rv = nghttp2_session_update_recv_stream_window_size(
|
|
session, stream, readlen,
|
|
iframe->payloadleft ||
|
|
(iframe->frame.hd.flags & NGHTTP2_FLAG_END_STREAM) == 0);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
padlen = inbound_frame_compute_pad(iframe);
|
|
if (padlen < 0) {
|
|
rv = nghttp2_session_terminate_session_with_reason(
|
|
session, NGHTTP2_PROTOCOL_ERROR, "DATA: invalid padding");
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
iframe->frame.data.padlen = (size_t)padlen;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_DATA;
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_DATA:
|
|
stream = nghttp2_session_get_stream(session, iframe->frame.hd.stream_id);
|
|
|
|
if (!stream) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_DATA;
|
|
break;
|
|
}
|
|
|
|
DEBUGF("recv: [IB_READ_DATA]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (readlen > 0) {
|
|
ssize_t data_readlen;
|
|
|
|
rv = nghttp2_session_update_recv_connection_window_size(session,
|
|
readlen);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
rv = nghttp2_session_update_recv_stream_window_size(
|
|
session, stream, readlen,
|
|
iframe->payloadleft ||
|
|
(iframe->frame.hd.flags & NGHTTP2_FLAG_END_STREAM) == 0);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
data_readlen = inbound_frame_effective_readlen(
|
|
iframe, iframe->payloadleft, readlen);
|
|
|
|
if (data_readlen == -1) {
|
|
/* everything is padding */
|
|
data_readlen = 0;
|
|
}
|
|
|
|
padlen = (ssize_t)readlen - data_readlen;
|
|
|
|
if (padlen > 0) {
|
|
/* Padding is considered as "consumed" immediately */
|
|
rv = nghttp2_session_consume(session, iframe->frame.hd.stream_id,
|
|
(size_t)padlen);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
}
|
|
|
|
DEBUGF("recv: data_readlen=%zd\n", data_readlen);
|
|
|
|
if (data_readlen > 0) {
|
|
if (session_enforce_http_messaging(session)) {
|
|
if (nghttp2_http_on_data_chunk(stream, (size_t)data_readlen) != 0) {
|
|
if (session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) {
|
|
/* Consume all data for connection immediately here */
|
|
rv = session_update_connection_consumed_size(
|
|
session, (size_t)data_readlen);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_DATA) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
}
|
|
|
|
rv = nghttp2_session_add_rst_stream(
|
|
session, iframe->frame.hd.stream_id, NGHTTP2_PROTOCOL_ERROR);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_DATA;
|
|
break;
|
|
}
|
|
}
|
|
if (session->callbacks.on_data_chunk_recv_callback) {
|
|
rv = session->callbacks.on_data_chunk_recv_callback(
|
|
session, iframe->frame.hd.flags, iframe->frame.hd.stream_id,
|
|
in - readlen, (size_t)data_readlen, session->user_data);
|
|
if (rv == NGHTTP2_ERR_PAUSE) {
|
|
return in - first;
|
|
}
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (iframe->payloadleft) {
|
|
break;
|
|
}
|
|
|
|
rv = session_process_data_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_IGN_DATA:
|
|
DEBUGF("recv: [IB_IGN_DATA]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (readlen > 0) {
|
|
/* Update connection-level flow control window for ignored
|
|
DATA frame too */
|
|
rv = nghttp2_session_update_recv_connection_window_size(session,
|
|
readlen);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
if (session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE) {
|
|
|
|
/* Ignored DATA is considered as "consumed" immediately. */
|
|
rv = session_update_connection_consumed_size(session, readlen);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (iframe->payloadleft) {
|
|
break;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_IGN_ALL:
|
|
return (ssize_t)inlen;
|
|
case NGHTTP2_IB_READ_EXTENSION_PAYLOAD:
|
|
DEBUGF("recv: [IB_READ_EXTENSION_PAYLOAD]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (readlen > 0) {
|
|
rv = session_call_on_extension_chunk_recv_callback(
|
|
session, in - readlen, readlen);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (rv != 0) {
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (iframe->payloadleft > 0) {
|
|
break;
|
|
}
|
|
|
|
rv = session_process_extension_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_ALTSVC_PAYLOAD:
|
|
DEBUGF("recv: [IB_READ_ALTSVC_PAYLOAD]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
if (readlen > 0) {
|
|
iframe->lbuf.last = nghttp2_cpymem(iframe->lbuf.last, in, readlen);
|
|
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
}
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (iframe->payloadleft) {
|
|
assert(nghttp2_buf_avail(&iframe->lbuf) > 0);
|
|
|
|
break;
|
|
}
|
|
|
|
rv = session_process_altsvc_frame(session);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_ORIGIN_PAYLOAD:
|
|
DEBUGF("recv: [IB_READ_ORIGIN_PAYLOAD]\n");
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
|
|
if (readlen > 0) {
|
|
iframe->lbuf.last = nghttp2_cpymem(iframe->lbuf.last, in, readlen);
|
|
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
}
|
|
|
|
DEBUGF("recv: readlen=%zu, payloadleft=%zu\n", readlen,
|
|
iframe->payloadleft);
|
|
|
|
if (iframe->payloadleft) {
|
|
assert(nghttp2_buf_avail(&iframe->lbuf) > 0);
|
|
|
|
break;
|
|
}
|
|
|
|
rv = session_process_origin_frame(session);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (iframe->state == NGHTTP2_IB_IGN_ALL) {
|
|
return (ssize_t)inlen;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
}
|
|
|
|
if (!busy && in == last) {
|
|
break;
|
|
}
|
|
|
|
busy = 0;
|
|
}
|
|
|
|
assert(in == last);
|
|
|
|
return in - first;
|
|
}
|
|
|
|
int nghttp2_session_recv(nghttp2_session *session) {
|
|
uint8_t buf[NGHTTP2_INBOUND_BUFFER_LENGTH];
|
|
while (1) {
|
|
ssize_t readlen;
|
|
readlen = session_recv(session, buf, sizeof(buf));
|
|
if (readlen > 0) {
|
|
ssize_t proclen = nghttp2_session_mem_recv(session, buf, (size_t)readlen);
|
|
if (proclen < 0) {
|
|
return (int)proclen;
|
|
}
|
|
assert(proclen == readlen);
|
|
} else if (readlen == 0 || readlen == NGHTTP2_ERR_WOULDBLOCK) {
|
|
return 0;
|
|
} else if (readlen == NGHTTP2_ERR_EOF) {
|
|
return NGHTTP2_ERR_EOF;
|
|
} else if (readlen < 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns the number of active streams, which includes streams in
|
|
* reserved state.
|
|
*/
|
|
static size_t session_get_num_active_streams(nghttp2_session *session) {
|
|
return nghttp2_map_size(&session->streams) - session->num_closed_streams -
|
|
session->num_idle_streams;
|
|
}
|
|
|
|
int nghttp2_session_want_read(nghttp2_session *session) {
|
|
size_t num_active_streams;
|
|
|
|
/* If this flag is set, we don't want to read. The application
|
|
should drop the connection. */
|
|
if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_SENT) {
|
|
return 0;
|
|
}
|
|
|
|
num_active_streams = session_get_num_active_streams(session);
|
|
|
|
/* Unless termination GOAWAY is sent or received, we always want to
|
|
read incoming frames. */
|
|
|
|
if (num_active_streams > 0) {
|
|
return 1;
|
|
}
|
|
|
|
/* If there is no active streams and GOAWAY has been sent or
|
|
received, we are done with this session. */
|
|
return (session->goaway_flags &
|
|
(NGHTTP2_GOAWAY_SENT | NGHTTP2_GOAWAY_RECV)) == 0;
|
|
}
|
|
|
|
int nghttp2_session_want_write(nghttp2_session *session) {
|
|
/* If these flag is set, we don't want to write any data. The
|
|
application should drop the connection. */
|
|
if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_SENT) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unless termination GOAWAY is sent or received, we want to write
|
|
* frames if there is pending ones. If pending frame is request/push
|
|
* response HEADERS and concurrent stream limit is reached, we don't
|
|
* want to write them.
|
|
*/
|
|
return session->aob.item || nghttp2_outbound_queue_top(&session->ob_urgent) ||
|
|
nghttp2_outbound_queue_top(&session->ob_reg) ||
|
|
((!nghttp2_pq_empty(&session->root.obq) ||
|
|
!session_sched_empty(session)) &&
|
|
session->remote_window_size > 0) ||
|
|
(nghttp2_outbound_queue_top(&session->ob_syn) &&
|
|
!session_is_outgoing_concurrent_streams_max(session));
|
|
}
|
|
|
|
int nghttp2_session_add_ping(nghttp2_session *session, uint8_t flags,
|
|
const uint8_t *opaque_data) {
|
|
int rv;
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_frame *frame;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
|
|
if ((flags & NGHTTP2_FLAG_ACK) &&
|
|
session->obq_flood_counter_ >= session->max_outbound_ack) {
|
|
return NGHTTP2_ERR_FLOODED;
|
|
}
|
|
|
|
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
|
|
if (item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_outbound_item_init(item);
|
|
|
|
frame = &item->frame;
|
|
|
|
nghttp2_frame_ping_init(&frame->ping, flags, opaque_data);
|
|
|
|
rv = nghttp2_session_add_item(session, item);
|
|
|
|
if (rv != 0) {
|
|
nghttp2_frame_ping_free(&frame->ping);
|
|
nghttp2_mem_free(mem, item);
|
|
return rv;
|
|
}
|
|
|
|
if (flags & NGHTTP2_FLAG_ACK) {
|
|
++session->obq_flood_counter_;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_add_goaway(nghttp2_session *session, int32_t last_stream_id,
|
|
uint32_t error_code, const uint8_t *opaque_data,
|
|
size_t opaque_data_len, uint8_t aux_flags) {
|
|
int rv;
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_frame *frame;
|
|
uint8_t *opaque_data_copy = NULL;
|
|
nghttp2_goaway_aux_data *aux_data;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
|
|
if (nghttp2_session_is_my_stream_id(session, last_stream_id)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
if (opaque_data_len) {
|
|
if (opaque_data_len + 8 > NGHTTP2_MAX_PAYLOADLEN) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
opaque_data_copy = nghttp2_mem_malloc(mem, opaque_data_len);
|
|
if (opaque_data_copy == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
memcpy(opaque_data_copy, opaque_data, opaque_data_len);
|
|
}
|
|
|
|
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
|
|
if (item == NULL) {
|
|
nghttp2_mem_free(mem, opaque_data_copy);
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_outbound_item_init(item);
|
|
|
|
frame = &item->frame;
|
|
|
|
/* last_stream_id must not be increased from the value previously
|
|
sent */
|
|
last_stream_id = nghttp2_min(last_stream_id, session->local_last_stream_id);
|
|
|
|
nghttp2_frame_goaway_init(&frame->goaway, last_stream_id, error_code,
|
|
opaque_data_copy, opaque_data_len);
|
|
|
|
aux_data = &item->aux_data.goaway;
|
|
aux_data->flags = aux_flags;
|
|
|
|
rv = nghttp2_session_add_item(session, item);
|
|
if (rv != 0) {
|
|
nghttp2_frame_goaway_free(&frame->goaway, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_add_window_update(nghttp2_session *session, uint8_t flags,
|
|
int32_t stream_id,
|
|
int32_t window_size_increment) {
|
|
int rv;
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_frame *frame;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
|
|
if (item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_outbound_item_init(item);
|
|
|
|
frame = &item->frame;
|
|
|
|
nghttp2_frame_window_update_init(&frame->window_update, flags, stream_id,
|
|
window_size_increment);
|
|
|
|
rv = nghttp2_session_add_item(session, item);
|
|
|
|
if (rv != 0) {
|
|
nghttp2_frame_window_update_free(&frame->window_update);
|
|
nghttp2_mem_free(mem, item);
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
session_append_inflight_settings(nghttp2_session *session,
|
|
nghttp2_inflight_settings *settings) {
|
|
nghttp2_inflight_settings **i;
|
|
|
|
for (i = &session->inflight_settings_head; *i; i = &(*i)->next)
|
|
;
|
|
|
|
*i = settings;
|
|
}
|
|
|
|
int nghttp2_session_add_settings(nghttp2_session *session, uint8_t flags,
|
|
const nghttp2_settings_entry *iv, size_t niv) {
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_frame *frame;
|
|
nghttp2_settings_entry *iv_copy;
|
|
size_t i;
|
|
int rv;
|
|
nghttp2_mem *mem;
|
|
nghttp2_inflight_settings *inflight_settings = NULL;
|
|
uint8_t no_rfc7540_pri = session->pending_no_rfc7540_priorities;
|
|
|
|
mem = &session->mem;
|
|
|
|
if (flags & NGHTTP2_FLAG_ACK) {
|
|
if (niv != 0) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
if (session->obq_flood_counter_ >= session->max_outbound_ack) {
|
|
return NGHTTP2_ERR_FLOODED;
|
|
}
|
|
}
|
|
|
|
if (!nghttp2_iv_check(iv, niv)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
for (i = 0; i < niv; ++i) {
|
|
if (iv[i].settings_id != NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES) {
|
|
continue;
|
|
}
|
|
|
|
if (no_rfc7540_pri == UINT8_MAX) {
|
|
no_rfc7540_pri = (uint8_t)iv[i].value;
|
|
continue;
|
|
}
|
|
|
|
if (iv[i].value != (uint32_t)no_rfc7540_pri) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
}
|
|
|
|
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
|
|
if (item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
if (niv > 0) {
|
|
iv_copy = nghttp2_frame_iv_copy(iv, niv, mem);
|
|
if (iv_copy == NULL) {
|
|
nghttp2_mem_free(mem, item);
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else {
|
|
iv_copy = NULL;
|
|
}
|
|
|
|
if ((flags & NGHTTP2_FLAG_ACK) == 0) {
|
|
rv = inflight_settings_new(&inflight_settings, iv, niv, mem);
|
|
if (rv != 0) {
|
|
assert(nghttp2_is_fatal(rv));
|
|
nghttp2_mem_free(mem, iv_copy);
|
|
nghttp2_mem_free(mem, item);
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
nghttp2_outbound_item_init(item);
|
|
|
|
frame = &item->frame;
|
|
|
|
nghttp2_frame_settings_init(&frame->settings, flags, iv_copy, niv);
|
|
rv = nghttp2_session_add_item(session, item);
|
|
if (rv != 0) {
|
|
/* The only expected error is fatal one */
|
|
assert(nghttp2_is_fatal(rv));
|
|
|
|
inflight_settings_del(inflight_settings, mem);
|
|
|
|
nghttp2_frame_settings_free(&frame->settings, mem);
|
|
nghttp2_mem_free(mem, item);
|
|
|
|
return rv;
|
|
}
|
|
|
|
if (flags & NGHTTP2_FLAG_ACK) {
|
|
++session->obq_flood_counter_;
|
|
} else {
|
|
session_append_inflight_settings(session, inflight_settings);
|
|
}
|
|
|
|
/* Extract NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS and ENABLE_PUSH
|
|
here. We use it to refuse the incoming stream and PUSH_PROMISE
|
|
with RST_STREAM. */
|
|
|
|
for (i = niv; i > 0; --i) {
|
|
if (iv[i - 1].settings_id == NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS) {
|
|
session->pending_local_max_concurrent_stream = iv[i - 1].value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = niv; i > 0; --i) {
|
|
if (iv[i - 1].settings_id == NGHTTP2_SETTINGS_ENABLE_PUSH) {
|
|
session->pending_enable_push = (uint8_t)iv[i - 1].value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = niv; i > 0; --i) {
|
|
if (iv[i - 1].settings_id == NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL) {
|
|
session->pending_enable_connect_protocol = (uint8_t)iv[i - 1].value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (no_rfc7540_pri == UINT8_MAX) {
|
|
session->pending_no_rfc7540_priorities = 0;
|
|
} else {
|
|
session->pending_no_rfc7540_priorities = no_rfc7540_pri;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_pack_data(nghttp2_session *session, nghttp2_bufs *bufs,
|
|
size_t datamax, nghttp2_frame *frame,
|
|
nghttp2_data_aux_data *aux_data,
|
|
nghttp2_stream *stream) {
|
|
int rv;
|
|
uint32_t data_flags;
|
|
ssize_t payloadlen;
|
|
ssize_t padded_payloadlen;
|
|
nghttp2_buf *buf;
|
|
size_t max_payloadlen;
|
|
|
|
assert(bufs->head == bufs->cur);
|
|
|
|
buf = &bufs->cur->buf;
|
|
|
|
if (session->callbacks.read_length_callback) {
|
|
|
|
payloadlen = session->callbacks.read_length_callback(
|
|
session, frame->hd.type, stream->stream_id, session->remote_window_size,
|
|
stream->remote_window_size, session->remote_settings.max_frame_size,
|
|
session->user_data);
|
|
|
|
DEBUGF("send: read_length_callback=%zd\n", payloadlen);
|
|
|
|
payloadlen = nghttp2_session_enforce_flow_control_limits(session, stream,
|
|
payloadlen);
|
|
|
|
DEBUGF("send: read_length_callback after flow control=%zd\n", payloadlen);
|
|
|
|
if (payloadlen <= 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
if ((size_t)payloadlen > nghttp2_buf_avail(buf)) {
|
|
/* Resize the current buffer(s). The reason why we do +1 for
|
|
buffer size is for possible padding field. */
|
|
rv = nghttp2_bufs_realloc(&session->aob.framebufs,
|
|
(size_t)(NGHTTP2_FRAME_HDLEN + 1 + payloadlen));
|
|
|
|
if (rv != 0) {
|
|
DEBUGF("send: realloc buffer failed rv=%d", rv);
|
|
/* If reallocation failed, old buffers are still in tact. So
|
|
use safe limit. */
|
|
payloadlen = (ssize_t)datamax;
|
|
|
|
DEBUGF("send: use safe limit payloadlen=%zd", payloadlen);
|
|
} else {
|
|
assert(&session->aob.framebufs == bufs);
|
|
|
|
buf = &bufs->cur->buf;
|
|
}
|
|
}
|
|
datamax = (size_t)payloadlen;
|
|
}
|
|
|
|
/* Current max DATA length is less then buffer chunk size */
|
|
assert(nghttp2_buf_avail(buf) >= datamax);
|
|
|
|
data_flags = NGHTTP2_DATA_FLAG_NONE;
|
|
payloadlen = aux_data->data_prd.read_callback(
|
|
session, frame->hd.stream_id, buf->pos, datamax, &data_flags,
|
|
&aux_data->data_prd.source, session->user_data);
|
|
|
|
if (payloadlen == NGHTTP2_ERR_DEFERRED ||
|
|
payloadlen == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE ||
|
|
payloadlen == NGHTTP2_ERR_PAUSE) {
|
|
DEBUGF("send: DATA postponed due to %s\n",
|
|
nghttp2_strerror((int)payloadlen));
|
|
|
|
return (int)payloadlen;
|
|
}
|
|
|
|
if (payloadlen < 0 || datamax < (size_t)payloadlen) {
|
|
/* This is the error code when callback is failed. */
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
buf->last = buf->pos + payloadlen;
|
|
buf->pos -= NGHTTP2_FRAME_HDLEN;
|
|
|
|
/* Clear flags, because this may contain previous flags of previous
|
|
DATA */
|
|
frame->hd.flags = NGHTTP2_FLAG_NONE;
|
|
|
|
if (data_flags & NGHTTP2_DATA_FLAG_EOF) {
|
|
aux_data->eof = 1;
|
|
/* If NGHTTP2_DATA_FLAG_NO_END_STREAM is set, don't set
|
|
NGHTTP2_FLAG_END_STREAM */
|
|
if ((aux_data->flags & NGHTTP2_FLAG_END_STREAM) &&
|
|
(data_flags & NGHTTP2_DATA_FLAG_NO_END_STREAM) == 0) {
|
|
frame->hd.flags |= NGHTTP2_FLAG_END_STREAM;
|
|
}
|
|
}
|
|
|
|
if (data_flags & NGHTTP2_DATA_FLAG_NO_COPY) {
|
|
if (session->callbacks.send_data_callback == NULL) {
|
|
DEBUGF("NGHTTP2_DATA_FLAG_NO_COPY requires send_data_callback set\n");
|
|
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
aux_data->no_copy = 1;
|
|
}
|
|
|
|
frame->hd.length = (size_t)payloadlen;
|
|
frame->data.padlen = 0;
|
|
|
|
max_payloadlen = nghttp2_min(datamax, frame->hd.length + NGHTTP2_MAX_PADLEN);
|
|
|
|
padded_payloadlen =
|
|
session_call_select_padding(session, frame, max_payloadlen);
|
|
|
|
if (nghttp2_is_fatal((int)padded_payloadlen)) {
|
|
return (int)padded_payloadlen;
|
|
}
|
|
|
|
frame->data.padlen = (size_t)(padded_payloadlen - payloadlen);
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
rv = nghttp2_frame_add_pad(bufs, &frame->hd, frame->data.padlen,
|
|
aux_data->no_copy);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
session_reschedule_stream(session, stream);
|
|
|
|
if (frame->hd.length == 0 && (data_flags & NGHTTP2_DATA_FLAG_EOF) &&
|
|
(data_flags & NGHTTP2_DATA_FLAG_NO_END_STREAM)) {
|
|
/* DATA payload length is 0, and DATA frame does not bear
|
|
END_STREAM. In this case, there is no point to send 0 length
|
|
DATA frame. */
|
|
return NGHTTP2_ERR_CANCEL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void *nghttp2_session_get_stream_user_data(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream) {
|
|
return stream->stream_user_data;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
int nghttp2_session_set_stream_user_data(nghttp2_session *session,
|
|
int32_t stream_id,
|
|
void *stream_user_data) {
|
|
nghttp2_stream *stream;
|
|
nghttp2_frame *frame;
|
|
nghttp2_outbound_item *item;
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream) {
|
|
stream->stream_user_data = stream_user_data;
|
|
return 0;
|
|
}
|
|
|
|
if (session->server || !nghttp2_session_is_my_stream_id(session, stream_id) ||
|
|
!nghttp2_outbound_queue_top(&session->ob_syn)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
frame = &nghttp2_outbound_queue_top(&session->ob_syn)->frame;
|
|
assert(frame->hd.type == NGHTTP2_HEADERS);
|
|
|
|
if (frame->hd.stream_id > stream_id ||
|
|
(uint32_t)stream_id >= session->next_stream_id) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
for (item = session->ob_syn.head; item; item = item->qnext) {
|
|
if (item->frame.hd.stream_id < stream_id) {
|
|
continue;
|
|
}
|
|
|
|
if (item->frame.hd.stream_id > stream_id) {
|
|
break;
|
|
}
|
|
|
|
item->aux_data.headers.stream_user_data = stream_user_data;
|
|
return 0;
|
|
}
|
|
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
int nghttp2_session_resume_data(nghttp2_session *session, int32_t stream_id) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL || !nghttp2_stream_check_deferred_item(stream)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
rv = session_resume_deferred_stream_item(session, stream,
|
|
NGHTTP2_STREAM_FLAG_DEFERRED_USER);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t nghttp2_session_get_outbound_queue_size(nghttp2_session *session) {
|
|
return nghttp2_outbound_queue_size(&session->ob_urgent) +
|
|
nghttp2_outbound_queue_size(&session->ob_reg) +
|
|
nghttp2_outbound_queue_size(&session->ob_syn);
|
|
/* TODO account for item attached to stream */
|
|
}
|
|
|
|
int32_t
|
|
nghttp2_session_get_stream_effective_recv_data_length(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return -1;
|
|
}
|
|
return stream->recv_window_size < 0 ? 0 : stream->recv_window_size;
|
|
}
|
|
|
|
int32_t
|
|
nghttp2_session_get_stream_effective_local_window_size(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return -1;
|
|
}
|
|
return stream->local_window_size;
|
|
}
|
|
|
|
int32_t nghttp2_session_get_stream_local_window_size(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
int32_t size;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
size = stream->local_window_size - stream->recv_window_size;
|
|
|
|
/* size could be negative if local endpoint reduced
|
|
SETTINGS_INITIAL_WINDOW_SIZE */
|
|
if (size < 0) {
|
|
return 0;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
int32_t
|
|
nghttp2_session_get_effective_recv_data_length(nghttp2_session *session) {
|
|
return session->recv_window_size < 0 ? 0 : session->recv_window_size;
|
|
}
|
|
|
|
int32_t
|
|
nghttp2_session_get_effective_local_window_size(nghttp2_session *session) {
|
|
return session->local_window_size;
|
|
}
|
|
|
|
int32_t nghttp2_session_get_local_window_size(nghttp2_session *session) {
|
|
return session->local_window_size - session->recv_window_size;
|
|
}
|
|
|
|
int32_t nghttp2_session_get_stream_remote_window_size(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if (stream == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
/* stream->remote_window_size can be negative when
|
|
SETTINGS_INITIAL_WINDOW_SIZE is changed. */
|
|
return nghttp2_max(0, stream->remote_window_size);
|
|
}
|
|
|
|
int32_t nghttp2_session_get_remote_window_size(nghttp2_session *session) {
|
|
return session->remote_window_size;
|
|
}
|
|
|
|
uint32_t nghttp2_session_get_remote_settings(nghttp2_session *session,
|
|
nghttp2_settings_id id) {
|
|
switch (id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
return session->remote_settings.header_table_size;
|
|
case NGHTTP2_SETTINGS_ENABLE_PUSH:
|
|
return session->remote_settings.enable_push;
|
|
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
|
|
return session->remote_settings.max_concurrent_streams;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
return session->remote_settings.initial_window_size;
|
|
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
|
|
return session->remote_settings.max_frame_size;
|
|
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
|
|
return session->remote_settings.max_header_list_size;
|
|
case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
|
|
return session->remote_settings.enable_connect_protocol;
|
|
case NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES:
|
|
return session->remote_settings.no_rfc7540_priorities;
|
|
}
|
|
|
|
assert(0);
|
|
abort(); /* if NDEBUG is set */
|
|
}
|
|
|
|
uint32_t nghttp2_session_get_local_settings(nghttp2_session *session,
|
|
nghttp2_settings_id id) {
|
|
switch (id) {
|
|
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
|
|
return session->local_settings.header_table_size;
|
|
case NGHTTP2_SETTINGS_ENABLE_PUSH:
|
|
return session->local_settings.enable_push;
|
|
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
|
|
return session->local_settings.max_concurrent_streams;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
return session->local_settings.initial_window_size;
|
|
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
|
|
return session->local_settings.max_frame_size;
|
|
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
|
|
return session->local_settings.max_header_list_size;
|
|
case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
|
|
return session->local_settings.enable_connect_protocol;
|
|
case NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES:
|
|
return session->local_settings.no_rfc7540_priorities;
|
|
}
|
|
|
|
assert(0);
|
|
abort(); /* if NDEBUG is set */
|
|
}
|
|
|
|
static int nghttp2_session_upgrade_internal(nghttp2_session *session,
|
|
const uint8_t *settings_payload,
|
|
size_t settings_payloadlen,
|
|
void *stream_user_data) {
|
|
nghttp2_stream *stream;
|
|
nghttp2_frame frame;
|
|
nghttp2_settings_entry *iv;
|
|
size_t niv;
|
|
int rv;
|
|
nghttp2_priority_spec pri_spec;
|
|
nghttp2_mem *mem;
|
|
|
|
mem = &session->mem;
|
|
|
|
if ((!session->server && session->next_stream_id != 1) ||
|
|
(session->server && session->last_recv_stream_id >= 1)) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
if (settings_payloadlen % NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
/* SETTINGS frame contains too many settings */
|
|
if (settings_payloadlen / NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH >
|
|
session->max_settings) {
|
|
return NGHTTP2_ERR_TOO_MANY_SETTINGS;
|
|
}
|
|
rv = nghttp2_frame_unpack_settings_payload2(&iv, &niv, settings_payload,
|
|
settings_payloadlen, mem);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if (session->server) {
|
|
nghttp2_frame_hd_init(&frame.hd, settings_payloadlen, NGHTTP2_SETTINGS,
|
|
NGHTTP2_FLAG_NONE, 0);
|
|
frame.settings.iv = iv;
|
|
frame.settings.niv = niv;
|
|
rv = nghttp2_session_on_settings_received(session, &frame, 1 /* No ACK */);
|
|
} else {
|
|
rv = nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, niv);
|
|
}
|
|
nghttp2_mem_free(mem, iv);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
nghttp2_priority_spec_default_init(&pri_spec);
|
|
|
|
stream = nghttp2_session_open_stream(
|
|
session, 1, NGHTTP2_STREAM_FLAG_NONE, &pri_spec, NGHTTP2_STREAM_OPENING,
|
|
session->server ? NULL : stream_user_data);
|
|
if (stream == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
/* We don't call nghttp2_session_adjust_closed_stream(), since this
|
|
should be the first stream open. */
|
|
|
|
if (session->server) {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
session->last_recv_stream_id = 1;
|
|
session->last_proc_stream_id = 1;
|
|
} else {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
|
|
session->last_sent_stream_id = 1;
|
|
session->next_stream_id += 2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_upgrade(nghttp2_session *session,
|
|
const uint8_t *settings_payload,
|
|
size_t settings_payloadlen,
|
|
void *stream_user_data) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
|
|
rv = nghttp2_session_upgrade_internal(session, settings_payload,
|
|
settings_payloadlen, stream_user_data);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, 1);
|
|
assert(stream);
|
|
|
|
/* We have no information about request header fields when Upgrade
|
|
was happened. So we don't know the request method here. If
|
|
request method is HEAD, we have a trouble because we may have
|
|
nonzero content-length header field in response headers, and we
|
|
will going to check it against the actual DATA frames, but we may
|
|
get mismatch because HEAD response body must be empty. Because
|
|
of this reason, nghttp2_session_upgrade() was deprecated in favor
|
|
of nghttp2_session_upgrade2(), which has |head_request| parameter
|
|
to indicate that request method is HEAD or not. */
|
|
stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_UPGRADE_WORKAROUND;
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_upgrade2(nghttp2_session *session,
|
|
const uint8_t *settings_payload,
|
|
size_t settings_payloadlen, int head_request,
|
|
void *stream_user_data) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
|
|
rv = nghttp2_session_upgrade_internal(session, settings_payload,
|
|
settings_payloadlen, stream_user_data);
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, 1);
|
|
assert(stream);
|
|
|
|
if (head_request) {
|
|
stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_HEAD;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_get_stream_local_close(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
if (!stream) {
|
|
return -1;
|
|
}
|
|
|
|
return (stream->shut_flags & NGHTTP2_SHUT_WR) != 0;
|
|
}
|
|
|
|
int nghttp2_session_get_stream_remote_close(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
if (!stream) {
|
|
return -1;
|
|
}
|
|
|
|
return (stream->shut_flags & NGHTTP2_SHUT_RD) != 0;
|
|
}
|
|
|
|
int nghttp2_session_consume(nghttp2_session *session, int32_t stream_id,
|
|
size_t size) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
|
|
if (stream_id == 0) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
if (!(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE)) {
|
|
return NGHTTP2_ERR_INVALID_STATE;
|
|
}
|
|
|
|
rv = session_update_connection_consumed_size(session, size);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
if (!stream) {
|
|
return 0;
|
|
}
|
|
|
|
rv = session_update_stream_consumed_size(session, stream, size);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_consume_connection(nghttp2_session *session, size_t size) {
|
|
int rv;
|
|
|
|
if (!(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE)) {
|
|
return NGHTTP2_ERR_INVALID_STATE;
|
|
}
|
|
|
|
rv = session_update_connection_consumed_size(session, size);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_consume_stream(nghttp2_session *session, int32_t stream_id,
|
|
size_t size) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
|
|
if (stream_id == 0) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
if (!(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE)) {
|
|
return NGHTTP2_ERR_INVALID_STATE;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
if (!stream) {
|
|
return 0;
|
|
}
|
|
|
|
rv = session_update_stream_consumed_size(session, stream, size);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_set_next_stream_id(nghttp2_session *session,
|
|
int32_t next_stream_id) {
|
|
if (next_stream_id <= 0 ||
|
|
session->next_stream_id > (uint32_t)next_stream_id) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
if (session->server) {
|
|
if (next_stream_id % 2) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
} else if (next_stream_id % 2 == 0) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
session->next_stream_id = (uint32_t)next_stream_id;
|
|
return 0;
|
|
}
|
|
|
|
uint32_t nghttp2_session_get_next_stream_id(nghttp2_session *session) {
|
|
return session->next_stream_id;
|
|
}
|
|
|
|
int32_t nghttp2_session_get_last_proc_stream_id(nghttp2_session *session) {
|
|
return session->last_proc_stream_id;
|
|
}
|
|
|
|
nghttp2_stream *nghttp2_session_find_stream(nghttp2_session *session,
|
|
int32_t stream_id) {
|
|
if (stream_id == 0) {
|
|
return &session->root;
|
|
}
|
|
|
|
return nghttp2_session_get_stream_raw(session, stream_id);
|
|
}
|
|
|
|
nghttp2_stream *nghttp2_session_get_root_stream(nghttp2_session *session) {
|
|
return &session->root;
|
|
}
|
|
|
|
int nghttp2_session_check_server_session(nghttp2_session *session) {
|
|
return session->server;
|
|
}
|
|
|
|
int nghttp2_session_change_stream_priority(
|
|
nghttp2_session *session, int32_t stream_id,
|
|
const nghttp2_priority_spec *pri_spec) {
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_priority_spec pri_spec_copy;
|
|
|
|
if (session->pending_no_rfc7540_priorities == 1) {
|
|
return 0;
|
|
}
|
|
|
|
if (stream_id == 0 || stream_id == pri_spec->stream_id) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream_raw(session, stream_id);
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
pri_spec_copy = *pri_spec;
|
|
nghttp2_priority_spec_normalize_weight(&pri_spec_copy);
|
|
|
|
rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec_copy);
|
|
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
/* We don't intentionally call nghttp2_session_adjust_idle_stream()
|
|
so that idle stream created by this function, and existing ones
|
|
are kept for application. We will adjust number of idle stream
|
|
in nghttp2_session_mem_send or nghttp2_session_mem_recv is
|
|
called. */
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_create_idle_stream(nghttp2_session *session,
|
|
int32_t stream_id,
|
|
const nghttp2_priority_spec *pri_spec) {
|
|
nghttp2_stream *stream;
|
|
nghttp2_priority_spec pri_spec_copy;
|
|
|
|
if (session->pending_no_rfc7540_priorities == 1) {
|
|
return 0;
|
|
}
|
|
|
|
if (stream_id == 0 || stream_id == pri_spec->stream_id ||
|
|
!session_detect_idle_stream(session, stream_id)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream_raw(session, stream_id);
|
|
if (stream) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
pri_spec_copy = *pri_spec;
|
|
nghttp2_priority_spec_normalize_weight(&pri_spec_copy);
|
|
|
|
stream =
|
|
nghttp2_session_open_stream(session, stream_id, NGHTTP2_STREAM_FLAG_NONE,
|
|
&pri_spec_copy, NGHTTP2_STREAM_IDLE, NULL);
|
|
if (!stream) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
/* We don't intentionally call nghttp2_session_adjust_idle_stream()
|
|
so that idle stream created by this function, and existing ones
|
|
are kept for application. We will adjust number of idle stream
|
|
in nghttp2_session_mem_send or nghttp2_session_mem_recv is
|
|
called. */
|
|
return 0;
|
|
}
|
|
|
|
size_t
|
|
nghttp2_session_get_hd_inflate_dynamic_table_size(nghttp2_session *session) {
|
|
return nghttp2_hd_inflate_get_dynamic_table_size(&session->hd_inflater);
|
|
}
|
|
|
|
size_t
|
|
nghttp2_session_get_hd_deflate_dynamic_table_size(nghttp2_session *session) {
|
|
return nghttp2_hd_deflate_get_dynamic_table_size(&session->hd_deflater);
|
|
}
|
|
|
|
void nghttp2_session_set_user_data(nghttp2_session *session, void *user_data) {
|
|
session->user_data = user_data;
|
|
}
|