6132 lines
178 KiB
C
6132 lines
178 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 "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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/*
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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 session_is_outgoing_concurrent_streams_max
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(nghttp2_session *session)
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{
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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 session_is_incoming_concurrent_streams_max
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(nghttp2_session *session)
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{
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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 session_is_incoming_concurrent_streams_pending_max
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(nghttp2_session *session)
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{
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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)
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{
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return lib_error < 0 && lib_error > NGHTTP2_ERR_FATAL;
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}
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int nghttp2_is_fatal(int lib_error)
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{
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return lib_error < NGHTTP2_ERR_FATAL;
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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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{
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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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{
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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.
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* This function returns 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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{
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if(stream_id == 0 || session->last_recv_stream_id >= stream_id) {
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return 0;
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}
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if(session->server) {
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return stream_id % 2 == 1;
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} else {
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return stream_id % 2 == 0;
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}
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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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{
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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->next_stream_id <= (uint32_t)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_terminate_session
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(nghttp2_session *session, int32_t last_stream_id,
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uint32_t error_code, const char *reason)
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{
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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_FAIL_ON_SEND) {
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return 0;
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}
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session->goaway_flags |= NGHTTP2_GOAWAY_FAIL_ON_SEND;
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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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return nghttp2_submit_goaway(session, NGHTTP2_FLAG_NONE, last_stream_id,
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error_code, debug_data, debug_datalen);
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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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{
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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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{
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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
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(nghttp2_session *session, uint32_t error_code, const char *reason)
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{
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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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{
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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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{
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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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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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{
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return (nghttp2_stream*)nghttp2_map_find(&session->streams, stream_id);
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}
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static int outbound_item_compar(const void *lhsx, const void *rhsx)
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{
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const nghttp2_outbound_item *lhs, *rhs;
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lhs = (const nghttp2_outbound_item*)lhsx;
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rhs = (const nghttp2_outbound_item*)rhsx;
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if(lhs->cycle == rhs->cycle) {
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if(lhs->weight == rhs->weight) {
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return (lhs->seq < rhs->seq) ? -1 : ((lhs->seq > rhs->seq) ? 1 : 0);
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}
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/* Larger weight has higher precedence */
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return rhs->weight - lhs->weight;
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}
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return (lhs->cycle < rhs->cycle) ? -1 : 1;
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}
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static void session_inbound_frame_reset(nghttp2_session *session)
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{
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nghttp2_inbound_frame *iframe = &session->iframe;
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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_HEADERS:
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nghttp2_frame_headers_free(&iframe->frame.headers);
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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);
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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);
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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);
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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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case NGHTTP2_EXT_ALTSVC:
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nghttp2_frame_altsvc_free(&iframe->frame.ext);
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break;
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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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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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nghttp2_buf_free(&iframe->lbuf);
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nghttp2_buf_wrap_init(&iframe->lbuf, NULL, 0);
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iframe->niv = 0;
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iframe->payloadleft = 0;
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iframe->padlen = 0;
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iframe->iv[NGHTTP2_INBOUND_NUM_IV - 1].settings_id =
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NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
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iframe->iv[NGHTTP2_INBOUND_NUM_IV - 1].value = UINT32_MAX;
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}
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static void init_settings(nghttp2_settings_storage *settings)
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{
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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_INITIAL_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_set_size = 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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{
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DEBUGF(fprintf(stderr, "send: reset nghttp2_active_outbound_item\n"));
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DEBUGF(fprintf(stderr, "send: aob->item = %p\n", aob->item));
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nghttp2_outbound_item_free(aob->item);
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free(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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}
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|
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/* This global variable exists for tests where we want to disable this
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check. */
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int nghttp2_enable_strict_first_settings_check = 1;
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static int session_new(nghttp2_session **session_ptr,
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const nghttp2_session_callbacks *callbacks,
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void *user_data,
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int server,
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const nghttp2_option *option)
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{
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int rv;
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*session_ptr = calloc(1, sizeof(nghttp2_session));
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if(*session_ptr == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto fail_session;
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}
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|
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/* next_stream_id is initialized in either
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nghttp2_session_client_new2 or nghttp2_session_server_new2 */
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rv = nghttp2_pq_init(&(*session_ptr)->ob_pq, outbound_item_compar);
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if(rv != 0) {
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goto fail_ob_pq;
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}
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rv = nghttp2_pq_init(&(*session_ptr)->ob_ss_pq, outbound_item_compar);
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if(rv != 0) {
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goto fail_ob_ss_pq;
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}
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rv = nghttp2_pq_init(&(*session_ptr)->ob_da_pq, outbound_item_compar);
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if(rv != 0) {
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goto fail_ob_da_pq;
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}
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rv = nghttp2_hd_deflate_init(&(*session_ptr)->hd_deflater);
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if(rv != 0) {
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goto fail_hd_deflater;
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}
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rv = nghttp2_hd_inflate_init(&(*session_ptr)->hd_inflater);
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if(rv != 0) {
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goto fail_hd_inflater;
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}
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rv = nghttp2_map_init(&(*session_ptr)->streams);
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if(rv != 0) {
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goto fail_map;
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}
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nghttp2_stream_roots_init(&(*session_ptr)->roots);
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(*session_ptr)->next_seq = 0;
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(*session_ptr)->last_cycle = 1;
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(*session_ptr)->remote_window_size = NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE;
|
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(*session_ptr)->recv_window_size = 0;
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(*session_ptr)->consumed_size = 0;
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(*session_ptr)->recv_reduction = 0;
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(*session_ptr)->local_window_size = NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE;
|
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|
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(*session_ptr)->goaway_flags = NGHTTP2_GOAWAY_NONE;
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(*session_ptr)->local_last_stream_id = (1u << 31) - 1;
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(*session_ptr)->remote_last_stream_id = (1u << 31) - 1;
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|
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(*session_ptr)->inflight_niv = -1;
|
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|
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(*session_ptr)->pending_local_max_concurrent_stream =
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NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS;
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|
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if(server) {
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(*session_ptr)->server = 1;
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}
|
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|
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/* 1 for Pad Field. */
|
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rv = nghttp2_bufs_init3(&(*session_ptr)->aob.framebufs,
|
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NGHTTP2_FRAMEBUF_CHUNKLEN, NGHTTP2_FRAMEBUF_MAX_NUM,
|
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1, NGHTTP2_FRAME_HDLEN + 1);
|
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if(rv != 0) {
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goto fail_aob_framebuf;
|
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}
|
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|
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active_outbound_item_reset(&(*session_ptr)->aob);
|
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|
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init_settings(&(*session_ptr)->remote_settings);
|
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init_settings(&(*session_ptr)->local_settings);
|
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|
|
|
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if(option) {
|
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if((option->opt_set_mask & NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE) &&
|
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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 =
|
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option->peer_max_concurrent_streams;
|
|
|
|
}
|
|
|
|
if(option->opt_set_mask & NGHTTP2_OPT_RECV_CLIENT_PREFACE) {
|
|
|
|
(*session_ptr)->opt_flags |= NGHTTP2_OPTMASK_RECV_CLIENT_PREFACE;
|
|
|
|
}
|
|
}
|
|
|
|
(*session_ptr)->callbacks = *callbacks;
|
|
(*session_ptr)->user_data = user_data;
|
|
|
|
session_inbound_frame_reset(*session_ptr);
|
|
|
|
if(server &&
|
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((*session_ptr)->opt_flags & NGHTTP2_OPTMASK_RECV_CLIENT_PREFACE)) {
|
|
|
|
nghttp2_inbound_frame *iframe = &(*session_ptr)->iframe;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_CLIENT_PREFACE;
|
|
iframe->payloadleft = NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN;
|
|
} else if(nghttp2_enable_strict_first_settings_check) {
|
|
nghttp2_inbound_frame *iframe = &(*session_ptr)->iframe;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_FIRST_SETTINGS;
|
|
}
|
|
|
|
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_pq_free(&(*session_ptr)->ob_da_pq);
|
|
fail_ob_da_pq:
|
|
nghttp2_pq_free(&(*session_ptr)->ob_ss_pq);
|
|
fail_ob_ss_pq:
|
|
nghttp2_pq_free(&(*session_ptr)->ob_pq);
|
|
fail_ob_pq:
|
|
free(*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_new2(session_ptr, callbacks, user_data, NULL);
|
|
}
|
|
|
|
int nghttp2_session_client_new2(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data,
|
|
const nghttp2_option *option)
|
|
{
|
|
int rv;
|
|
nghttp2_session *session;
|
|
|
|
rv = session_new(&session, callbacks, user_data, 0, option);
|
|
|
|
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_new2(session_ptr, callbacks, user_data, NULL);
|
|
}
|
|
|
|
int nghttp2_session_server_new2(nghttp2_session **session_ptr,
|
|
const nghttp2_session_callbacks *callbacks,
|
|
void *user_data,
|
|
const nghttp2_option *option)
|
|
{
|
|
int rv;
|
|
nghttp2_session *session;
|
|
|
|
rv = session_new(&session, callbacks, user_data, 1, option);
|
|
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
/* IDs for use in client */
|
|
session->next_stream_id = 2;
|
|
|
|
*session_ptr = session;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int free_streams(nghttp2_map_entry *entry, void *ptr)
|
|
{
|
|
nghttp2_session *session;
|
|
nghttp2_stream *stream;
|
|
nghttp2_outbound_item *item;
|
|
|
|
session = (nghttp2_session*)ptr;
|
|
stream = (nghttp2_stream*)entry;
|
|
item = stream->data_item;
|
|
|
|
if(item && !item->queued && item != session->aob.item) {
|
|
nghttp2_outbound_item_free(item);
|
|
free(item);
|
|
}
|
|
|
|
nghttp2_stream_free(stream);
|
|
free(stream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ob_pq_free(nghttp2_pq *pq)
|
|
{
|
|
while(!nghttp2_pq_empty(pq)) {
|
|
nghttp2_outbound_item *item = (nghttp2_outbound_item*)nghttp2_pq_top(pq);
|
|
nghttp2_outbound_item_free(item);
|
|
free(item);
|
|
nghttp2_pq_pop(pq);
|
|
}
|
|
nghttp2_pq_free(pq);
|
|
}
|
|
|
|
void nghttp2_session_del(nghttp2_session *session)
|
|
{
|
|
if(session == NULL) {
|
|
return;
|
|
}
|
|
free(session->inflight_iv);
|
|
|
|
nghttp2_stream_roots_free(&session->roots);
|
|
|
|
/* Have to free streams first, so that we can check
|
|
stream->data_item->queued */
|
|
nghttp2_map_each_free(&session->streams, free_streams, session);
|
|
nghttp2_map_free(&session->streams);
|
|
|
|
ob_pq_free(&session->ob_pq);
|
|
ob_pq_free(&session->ob_ss_pq);
|
|
ob_pq_free(&session->ob_da_pq);
|
|
active_outbound_item_reset(&session->aob);
|
|
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);
|
|
free(session);
|
|
}
|
|
|
|
int nghttp2_session_reprioritize_stream
|
|
(nghttp2_session *session, nghttp2_stream *stream,
|
|
const nghttp2_priority_spec *pri_spec)
|
|
{
|
|
int rv;
|
|
nghttp2_stream *dep_stream;
|
|
nghttp2_stream *root_stream;
|
|
|
|
if(pri_spec->stream_id == stream->stream_id) {
|
|
return nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR, "depend on itself");
|
|
}
|
|
|
|
if(pri_spec->stream_id == 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 &&
|
|
session->roots.num_streams <= NGHTTP2_MAX_DEP_TREE_LENGTH) {
|
|
|
|
rv = nghttp2_stream_dep_all_your_stream_are_belong_to_us
|
|
(stream, &session->ob_da_pq, session->last_cycle);
|
|
} else {
|
|
rv = nghttp2_stream_dep_make_root(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
dep_stream = nghttp2_session_get_stream_raw(session, pri_spec->stream_id);
|
|
|
|
if(!dep_stream || !nghttp2_stream_in_dep_tree(dep_stream)) {
|
|
return 0;
|
|
}
|
|
|
|
if(nghttp2_stream_dep_subtree_find(stream, dep_stream)) {
|
|
DEBUGF(fprintf(stderr,
|
|
"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);
|
|
nghttp2_stream_dep_make_root(dep_stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
}
|
|
|
|
nghttp2_stream_dep_remove_subtree(stream);
|
|
|
|
/* We have to update weight after removing stream from tree */
|
|
stream->weight = pri_spec->weight;
|
|
|
|
root_stream = nghttp2_stream_get_dep_root(dep_stream);
|
|
|
|
if(root_stream->num_substreams + stream->num_substreams >
|
|
NGHTTP2_MAX_DEP_TREE_LENGTH) {
|
|
rv = nghttp2_stream_dep_make_root(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
} else {
|
|
if(pri_spec->exclusive) {
|
|
rv = nghttp2_stream_dep_insert_subtree(dep_stream, stream,
|
|
&session->ob_da_pq,
|
|
session->last_cycle);
|
|
} else {
|
|
rv = nghttp2_stream_dep_add_subtree(dep_stream, stream,
|
|
&session->ob_da_pq,
|
|
session->last_cycle);
|
|
}
|
|
}
|
|
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_session_outbound_item_init(nghttp2_session* session,
|
|
nghttp2_outbound_item *item)
|
|
{
|
|
item->seq = session->next_seq++;
|
|
/* We use cycle for DATA only */
|
|
item->cycle = 0;
|
|
item->weight = NGHTTP2_OB_EX_WEIGHT;
|
|
item->queued = 0;
|
|
|
|
memset(&item->aux_data, 0, sizeof(nghttp2_aux_data));
|
|
}
|
|
|
|
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);
|
|
|
|
if(frame->hd.type != NGHTTP2_DATA) {
|
|
|
|
switch(frame->hd.type) {
|
|
case NGHTTP2_RST_STREAM:
|
|
if(stream) {
|
|
/* We rely on the stream state to decide whether number of
|
|
streams should be decremented or not. For purly reserved
|
|
streams, they are not counted to those numbers and we must
|
|
keep this state in order not to decrement the number. */
|
|
if(stream->state != NGHTTP2_STREAM_RESERVED) {
|
|
stream->state = NGHTTP2_STREAM_CLOSING;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case NGHTTP2_SETTINGS:
|
|
item->weight = NGHTTP2_OB_SETTINGS_WEIGHT;
|
|
|
|
break;
|
|
case NGHTTP2_PING:
|
|
/* Ping has highest priority. */
|
|
item->weight = NGHTTP2_OB_PING_WEIGHT;
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if(frame->hd.type == NGHTTP2_HEADERS &&
|
|
(frame->headers.cat == NGHTTP2_HCAT_REQUEST ||
|
|
(stream && stream->state == NGHTTP2_STREAM_RESERVED))) {
|
|
/* 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_ss_pq, which is not
|
|
desirable. */
|
|
rv = nghttp2_pq_push(&session->ob_ss_pq, item);
|
|
} else {
|
|
rv = nghttp2_pq_push(&session->ob_pq, item);
|
|
}
|
|
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
item->queued = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if(!stream) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
|
|
if(stream->data_item) {
|
|
return NGHTTP2_ERR_DATA_EXIST;
|
|
}
|
|
|
|
item->weight = stream->effective_weight;
|
|
item->cycle = session->last_cycle;
|
|
|
|
rv = nghttp2_stream_attach_data(stream, item, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
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;
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if(stream && stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return 0;
|
|
}
|
|
|
|
item = malloc(sizeof(nghttp2_outbound_item));
|
|
if(item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_session_outbound_item_init(session, 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);
|
|
free(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,
|
|
nghttp2_stream_state initial_state,
|
|
void *stream_user_data)
|
|
{
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
nghttp2_stream *dep_stream;
|
|
nghttp2_stream *root_stream;
|
|
|
|
if(session->server && !nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
nghttp2_session_adjust_closed_stream(session, 1);
|
|
}
|
|
|
|
stream = malloc(sizeof(nghttp2_stream));
|
|
if(stream == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
nghttp2_stream_init(stream, stream_id, flags, initial_state,
|
|
pri_spec->weight, &session->roots,
|
|
session->remote_settings.initial_window_size,
|
|
session->local_settings.initial_window_size,
|
|
stream_user_data);
|
|
|
|
rv = nghttp2_map_insert(&session->streams, &stream->map_entry);
|
|
if(rv != 0) {
|
|
free(stream);
|
|
return NULL;
|
|
}
|
|
|
|
if(initial_state == NGHTTP2_STREAM_RESERVED) {
|
|
if(nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
/* half closed (remote) */
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
} else {
|
|
/* half closed (local) */
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
|
|
}
|
|
/* Reserved stream does not count in the concurrent streams
|
|
limit. That is one of the DOS vector. */
|
|
} else {
|
|
if(nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
++session->num_outgoing_streams;
|
|
} else {
|
|
++session->num_incoming_streams;
|
|
}
|
|
}
|
|
|
|
/* We don't have to track dependency of received reserved stream */
|
|
if(stream->shut_flags & NGHTTP2_SHUT_WR) {
|
|
return stream;
|
|
}
|
|
|
|
if(pri_spec->stream_id == 0) {
|
|
|
|
++session->roots.num_streams;
|
|
|
|
if(pri_spec->exclusive &&
|
|
session->roots.num_streams <= NGHTTP2_MAX_DEP_TREE_LENGTH) {
|
|
rv = nghttp2_stream_dep_all_your_stream_are_belong_to_us
|
|
(stream, &session->ob_da_pq, session->last_cycle);
|
|
|
|
/* Since no dpri is changed in dependency tree, the above
|
|
function call never fail. */
|
|
assert(rv == 0);
|
|
} else {
|
|
nghttp2_stream_roots_add(&session->roots, stream);
|
|
}
|
|
|
|
return stream;
|
|
}
|
|
|
|
dep_stream = nghttp2_session_get_stream_raw(session, pri_spec->stream_id);
|
|
|
|
/* If dep_stream is not part of dependency tree, we don't use it. */
|
|
if(!dep_stream || !nghttp2_stream_in_dep_tree(dep_stream)) {
|
|
return stream;
|
|
}
|
|
|
|
/* TODO Client does not have to track dependencies of streams except
|
|
for those which have upload data. Currently, we just track
|
|
everything. */
|
|
|
|
root_stream = nghttp2_stream_get_dep_root(dep_stream);
|
|
|
|
if(root_stream->num_substreams < NGHTTP2_MAX_DEP_TREE_LENGTH) {
|
|
if(pri_spec->exclusive) {
|
|
nghttp2_stream_dep_insert(dep_stream, stream);
|
|
} 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;
|
|
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
if(!stream) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
DEBUGF(fprintf(stderr, "stream: stream(%p)=%d close\n",
|
|
stream, stream->stream_id));
|
|
|
|
if(stream->data_item) {
|
|
nghttp2_outbound_item *item;
|
|
|
|
item = stream->data_item;
|
|
|
|
rv = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
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);
|
|
free(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;
|
|
}
|
|
}
|
|
|
|
if(stream->state != NGHTTP2_STREAM_RESERVED) {
|
|
if(nghttp2_session_is_my_stream_id(session, 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->server &&
|
|
nghttp2_stream_in_dep_tree(stream) &&
|
|
!nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
/* On server side, retain incoming stream object at most
|
|
MAX_CONCURRENT_STREAMS combined with the current active streams
|
|
to make dependency tree work better. */
|
|
nghttp2_session_keep_closed_stream(session, stream);
|
|
} else {
|
|
nghttp2_session_destroy_stream(session, stream);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nghttp2_session_destroy_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream)
|
|
{
|
|
DEBUGF(fprintf(stderr, "stream: destroy closed stream(%p)=%d\n",
|
|
stream, stream->stream_id));
|
|
|
|
nghttp2_stream_dep_remove(stream);
|
|
|
|
nghttp2_map_remove(&session->streams, stream->stream_id);
|
|
nghttp2_stream_free(stream);
|
|
free(stream);
|
|
}
|
|
|
|
void nghttp2_session_keep_closed_stream(nghttp2_session *session,
|
|
nghttp2_stream *stream)
|
|
{
|
|
DEBUGF(fprintf(stderr, "stream: keep closed stream(%p)=%d\n",
|
|
stream, stream->stream_id));
|
|
|
|
if(session->closed_stream_tail) {
|
|
session->closed_stream_tail->closed_next = stream;
|
|
} else {
|
|
session->closed_stream_head = stream;
|
|
}
|
|
session->closed_stream_tail = stream;
|
|
|
|
++session->num_closed_streams;
|
|
|
|
nghttp2_session_adjust_closed_stream(session, 0);
|
|
}
|
|
|
|
void nghttp2_session_adjust_closed_stream(nghttp2_session *session,
|
|
ssize_t offset)
|
|
{
|
|
size_t num_stream_max;
|
|
|
|
num_stream_max = nghttp2_min(session->local_settings.max_concurrent_streams,
|
|
session->pending_local_max_concurrent_stream);
|
|
|
|
DEBUGF(fprintf(stderr, "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 + offset
|
|
> num_stream_max) {
|
|
nghttp2_stream *head_stream;
|
|
|
|
head_stream = session->closed_stream_head;
|
|
|
|
session->closed_stream_head = head_stream->closed_next;
|
|
|
|
if(session->closed_stream_tail == head_stream) {
|
|
session->closed_stream_tail = NULL;
|
|
}
|
|
|
|
nghttp2_session_destroy_stream(session, head_stream);
|
|
/* head_stream is now freed */
|
|
--session->num_closed_streams;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
static int stream_predicate_for_send(nghttp2_stream *stream)
|
|
{
|
|
if(stream == NULL) {
|
|
return NGHTTP2_ERR_STREAM_CLOSED;
|
|
}
|
|
if(stream->shut_flags & NGHTTP2_SHUT_WR) {
|
|
return NGHTTP2_ERR_STREAM_SHUT_WR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS frame |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 GOAWAY is already sent or
|
|
* received.
|
|
*/
|
|
static int session_predicate_request_headers_send
|
|
(nghttp2_session *session, nghttp2_headers *frame)
|
|
{
|
|
if(session->goaway_flags) {
|
|
/* When GOAWAY is sent or received, peer must not send new request
|
|
HEADERS. */
|
|
return NGHTTP2_ERR_START_STREAM_NOT_ALLOWED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS, which is the first frame from the
|
|
* server, with the stream ID |stream_id| can be sent at this time.
|
|
*
|
|
* 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.
|
|
*/
|
|
static int session_predicate_response_headers_send
|
|
(nghttp2_session *session, int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream = nghttp2_session_get_stream(session, stream_id);
|
|
int rv;
|
|
rv = stream_predicate_for_send(stream);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
if(nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_ID;
|
|
}
|
|
if(stream->state == NGHTTP2_STREAM_OPENING) {
|
|
return 0;
|
|
}
|
|
if(stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS for reserved stream can be sent. The
|
|
* stream |stream_id| must be reserved state and the |session| is
|
|
* server side.
|
|
*
|
|
* 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.
|
|
*/
|
|
static int session_predicate_push_response_headers_send
|
|
(nghttp2_session *session, int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream = nghttp2_session_get_stream(session, stream_id);
|
|
int rv;
|
|
/* TODO Should disallow HEADERS if GOAWAY has already been issued? */
|
|
rv = stream_predicate_for_send(stream);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
if(stream->state != NGHTTP2_STREAM_RESERVED) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
if(stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks frames belongs to the stream |stream_id| can
|
|
* be sent.
|
|
*
|
|
* 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.
|
|
*/
|
|
static int session_predicate_stream_frame_send
|
|
(nghttp2_session* session, int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream = nghttp2_session_get_stream(session, stream_id);
|
|
int rv;
|
|
rv = stream_predicate_for_send(stream);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
if(nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
if(stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
return NGHTTP2_ERR_STREAM_CLOSING;
|
|
}
|
|
return 0;
|
|
}
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* This function checks HEADERS, which is neither stream-opening nor
|
|
* first response header, with the stream ID |stream_id| can be sent
|
|
* at this time.
|
|
*/
|
|
static int session_predicate_headers_send(nghttp2_session *session,
|
|
int32_t stream_id)
|
|
{
|
|
return session_predicate_stream_frame_send(session, stream_id);
|
|
}
|
|
|
|
/*
|
|
* This function checks PRIORITY frame with stream ID |stream_id| can
|
|
* be sent at this time.
|
|
*/
|
|
static int session_predicate_priority_send
|
|
(nghttp2_session *session, int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
|
|
/* PRIORITY must not be sent in reserved(local) */
|
|
if(stream) {
|
|
if(state_reserved_local(session, stream)) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
} else if(session_detect_idle_stream(session, stream_id)) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_ID;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks PUSH_PROMISE frame |frame| with stream ID
|
|
* |stream_id| 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 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.
|
|
*/
|
|
static int session_predicate_push_promise_send
|
|
(nghttp2_session *session, int32_t stream_id)
|
|
{
|
|
int rv;
|
|
nghttp2_stream *stream;
|
|
if(!session->server) {
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
if(nghttp2_session_is_my_stream_id(session, stream_id)) {
|
|
/* The associated stream must be initiated by the remote peer */
|
|
return NGHTTP2_ERR_PROTO;
|
|
}
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
rv = stream_predicate_for_send(stream);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
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) {
|
|
/* When GOAWAY is sent or received, peer must not promise new
|
|
stream ID */
|
|
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.
|
|
*/
|
|
static int session_predicate_window_update_send
|
|
(nghttp2_session *session, int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream;
|
|
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(stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
return NGHTTP2_ERR_INVALID_STREAM_STATE;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks ALTSVC with the stream ID |stream_id| can be
|
|
* sent at this time. If |stream_id| is 0, ATLSVC frame is always
|
|
* allowed to send.
|
|
*
|
|
* 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.
|
|
*/
|
|
static int session_predicate_altsvc_send
|
|
(nghttp2_session *session, int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* This function checks SETTINGS can be sent at this time.
|
|
*
|
|
* Currently this function always returns 0.
|
|
*/
|
|
static int nghttp2_session_predicate_settings_send(nghttp2_session *session,
|
|
nghttp2_frame *frame)
|
|
{
|
|
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(fprintf(stderr,
|
|
"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),
|
|
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(fprintf(stderr, "send: available window=%zd\n", window_size));
|
|
|
|
return window_size > 0 ? (size_t) window_size : 0;
|
|
}
|
|
|
|
/*
|
|
* This function checks DATA with the stream ID |stream_id| can be
|
|
* sent at this time.
|
|
*
|
|
* 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.
|
|
*/
|
|
static int nghttp2_session_predicate_data_send(nghttp2_session *session,
|
|
int32_t stream_id)
|
|
{
|
|
nghttp2_stream *stream = nghttp2_session_get_stream(session, stream_id);
|
|
int rv;
|
|
rv = stream_predicate_for_send(stream);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
if(nghttp2_session_is_my_stream_id(session, 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 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 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 = padded_payloadlen - frame->hd.length;
|
|
|
|
DEBUGF(fprintf(stderr,
|
|
"send: padding selected: payloadlen=%zu, padlen=%zu\n",
|
|
padded_payloadlen, padlen));
|
|
|
|
rv = nghttp2_frame_add_pad(framebufs, &frame->hd, padlen);
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 framerv = 0;
|
|
int rv;
|
|
nghttp2_frame *frame;
|
|
|
|
frame = &item->frame;
|
|
|
|
if(frame->hd.type != NGHTTP2_DATA) {
|
|
switch(frame->hd.type) {
|
|
case NGHTTP2_HEADERS: {
|
|
nghttp2_headers_aux_data *aux_data;
|
|
size_t estimated_payloadlen;
|
|
|
|
aux_data = &item->aux_data.headers;
|
|
|
|
estimated_payloadlen = session_estimate_headers_payload
|
|
(session, frame->headers.nva, frame->headers.nvlen,
|
|
NGHTTP2_PRIORITY_SPECLEN);
|
|
|
|
if(estimated_payloadlen > NGHTTP2_MAX_HEADERSLEN) {
|
|
return NGHTTP2_ERR_FRAME_SIZE_ERROR;
|
|
}
|
|
|
|
if(frame->headers.cat == NGHTTP2_HCAT_REQUEST) {
|
|
nghttp2_stream *stream;
|
|
|
|
/* initial HEADERS, which opens stream */
|
|
rv = session_predicate_request_headers_send(session, &frame->headers);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
} else if(session_predicate_push_response_headers_send
|
|
(session, frame->hd.stream_id) == 0) {
|
|
frame->headers.cat = NGHTTP2_HCAT_PUSH_RESPONSE;
|
|
|
|
if(aux_data->stream_user_data) {
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
stream->stream_user_data = aux_data->stream_user_data;
|
|
}
|
|
} else if(session_predicate_response_headers_send
|
|
(session, frame->hd.stream_id) == 0) {
|
|
frame->headers.cat = NGHTTP2_HCAT_RESPONSE;
|
|
} else {
|
|
frame->headers.cat = NGHTTP2_HCAT_HEADERS;
|
|
rv = session_predicate_headers_send(session, frame->hd.stream_id);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
framerv = nghttp2_frame_pack_headers(&session->aob.framebufs,
|
|
&frame->headers,
|
|
&session->hd_deflater);
|
|
|
|
if(framerv < 0) {
|
|
goto close_stream_return;
|
|
}
|
|
|
|
DEBUGF(fprintf(stderr,
|
|
"send: before padding, HEADERS serialized in %zd bytes\n",
|
|
nghttp2_bufs_len(&session->aob.framebufs)));
|
|
|
|
framerv = session_headers_add_pad(session, frame);
|
|
|
|
if(framerv < 0) {
|
|
goto close_stream_return;
|
|
}
|
|
|
|
DEBUGF(fprintf(stderr, "send: HEADERS finally serialized in %zd bytes\n",
|
|
nghttp2_bufs_len(&session->aob.framebufs)));
|
|
|
|
break;
|
|
|
|
close_stream_return:
|
|
|
|
if(frame->headers.cat == NGHTTP2_HCAT_REQUEST &&
|
|
!nghttp2_is_fatal(framerv)) {
|
|
rv = nghttp2_session_close_stream(session, frame->hd.stream_id,
|
|
NGHTTP2_NO_ERROR);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return framerv;
|
|
}
|
|
case NGHTTP2_PRIORITY: {
|
|
rv = session_predicate_priority_send(session, frame->hd.stream_id);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
framerv = nghttp2_frame_pack_priority(&session->aob.framebufs,
|
|
&frame->priority);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_RST_STREAM:
|
|
framerv = nghttp2_frame_pack_rst_stream(&session->aob.framebufs,
|
|
&frame->rst_stream);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
break;
|
|
case NGHTTP2_SETTINGS: {
|
|
rv = nghttp2_session_predicate_settings_send(session, frame);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
framerv = nghttp2_frame_pack_settings(&session->aob.framebufs,
|
|
&frame->settings);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_PUSH_PROMISE: {
|
|
nghttp2_stream *stream;
|
|
nghttp2_headers_aux_data *aux_data;
|
|
nghttp2_priority_spec pri_spec;
|
|
size_t estimated_payloadlen;
|
|
|
|
aux_data = &item->aux_data.headers;
|
|
|
|
estimated_payloadlen = session_estimate_headers_payload
|
|
(session, frame->push_promise.nva, frame->push_promise.nvlen, 0);
|
|
|
|
if(estimated_payloadlen > NGHTTP2_MAX_HEADERSLEN) {
|
|
return NGHTTP2_ERR_FRAME_SIZE_ERROR;
|
|
}
|
|
|
|
rv = session_predicate_push_promise_send(session, frame->hd.stream_id);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
framerv = nghttp2_frame_pack_push_promise(&session->aob.framebufs,
|
|
&frame->push_promise,
|
|
&session->hd_deflater);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
framerv = session_headers_add_pad(session, frame);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
assert(stream);
|
|
|
|
/* TODO It is unclear reserved stream dpeneds on associated
|
|
stream with or without exclusive flag set */
|
|
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_PUSH,
|
|
&pri_spec,
|
|
NGHTTP2_STREAM_RESERVED,
|
|
aux_data->stream_user_data)) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_PING:
|
|
framerv = nghttp2_frame_pack_ping(&session->aob.framebufs,
|
|
&frame->ping);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
break;
|
|
case NGHTTP2_WINDOW_UPDATE: {
|
|
rv = session_predicate_window_update_send(session, frame->hd.stream_id);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
framerv = nghttp2_frame_pack_window_update(&session->aob.framebufs,
|
|
&frame->window_update);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_GOAWAY:
|
|
if(session->local_last_stream_id < frame->goaway.last_stream_id) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
framerv = nghttp2_frame_pack_goaway(&session->aob.framebufs,
|
|
&frame->goaway);
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
session->local_last_stream_id = frame->goaway.last_stream_id;
|
|
|
|
break;
|
|
case NGHTTP2_EXT_ALTSVC:
|
|
rv = session_predicate_altsvc_send(session, frame->hd.stream_id);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
framerv = nghttp2_frame_pack_altsvc(&session->aob.framebufs,
|
|
&frame->ext);
|
|
|
|
if(framerv < 0) {
|
|
return framerv;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
return 0;
|
|
} else {
|
|
size_t next_readmax;
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
if(stream) {
|
|
assert(stream->data_item == item);
|
|
}
|
|
|
|
rv = nghttp2_session_predicate_data_send(session, frame->hd.stream_id);
|
|
if(rv != 0) {
|
|
int rv2;
|
|
|
|
if(stream) {
|
|
rv2 = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
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 = nghttp2_stream_defer_data
|
|
(stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL,
|
|
&session->ob_da_pq, session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session->aob.item = NULL;
|
|
active_outbound_item_reset(&session->aob);
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
}
|
|
|
|
framerv = nghttp2_session_pack_data(session,
|
|
&session->aob.framebufs,
|
|
next_readmax,
|
|
frame,
|
|
&item->aux_data.data);
|
|
if(framerv == NGHTTP2_ERR_DEFERRED) {
|
|
rv = nghttp2_stream_defer_data(stream, NGHTTP2_STREAM_FLAG_DEFERRED_USER,
|
|
&session->ob_da_pq, session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session->aob.item = NULL;
|
|
active_outbound_item_reset(&session->aob);
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
}
|
|
if(framerv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
rv = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_session_add_rst_stream(session, frame->hd.stream_id,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
return framerv;
|
|
}
|
|
if(framerv < 0) {
|
|
rv = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return framerv;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Used only for tests */
|
|
nghttp2_outbound_item* nghttp2_session_get_ob_pq_top
|
|
(nghttp2_session *session)
|
|
{
|
|
return (nghttp2_outbound_item*)nghttp2_pq_top(&session->ob_pq);
|
|
}
|
|
|
|
nghttp2_outbound_item* nghttp2_session_get_next_ob_item
|
|
(nghttp2_session *session)
|
|
{
|
|
nghttp2_outbound_item *item, *headers_item;
|
|
|
|
if(nghttp2_pq_empty(&session->ob_pq)) {
|
|
if(nghttp2_pq_empty(&session->ob_ss_pq)) {
|
|
if(session->remote_window_size == 0 ||
|
|
nghttp2_pq_empty(&session->ob_da_pq)) {
|
|
return NULL;
|
|
}
|
|
|
|
return nghttp2_pq_top(&session->ob_da_pq);
|
|
}
|
|
|
|
/* Return item only when concurrent connection limit is not
|
|
reached */
|
|
if(session_is_outgoing_concurrent_streams_max(session)) {
|
|
if(session->remote_window_size == 0 ||
|
|
nghttp2_pq_empty(&session->ob_da_pq)) {
|
|
return NULL;
|
|
}
|
|
|
|
return nghttp2_pq_top(&session->ob_da_pq);
|
|
}
|
|
|
|
return nghttp2_pq_top(&session->ob_ss_pq);
|
|
}
|
|
|
|
if(nghttp2_pq_empty(&session->ob_ss_pq)) {
|
|
return nghttp2_pq_top(&session->ob_pq);
|
|
}
|
|
|
|
item = nghttp2_pq_top(&session->ob_pq);
|
|
headers_item = nghttp2_pq_top(&session->ob_ss_pq);
|
|
|
|
if(session_is_outgoing_concurrent_streams_max(session) ||
|
|
item->weight > headers_item->weight ||
|
|
(item->weight == headers_item->weight &&
|
|
item->seq < headers_item->seq)) {
|
|
return item;
|
|
}
|
|
|
|
return headers_item;
|
|
}
|
|
|
|
nghttp2_outbound_item* nghttp2_session_pop_next_ob_item
|
|
(nghttp2_session *session)
|
|
{
|
|
nghttp2_outbound_item *item, *headers_item;
|
|
|
|
if(nghttp2_pq_empty(&session->ob_pq)) {
|
|
if(nghttp2_pq_empty(&session->ob_ss_pq)) {
|
|
if(session->remote_window_size == 0 ||
|
|
nghttp2_pq_empty(&session->ob_da_pq)) {
|
|
return NULL;
|
|
}
|
|
|
|
item = nghttp2_pq_top(&session->ob_da_pq);
|
|
nghttp2_pq_pop(&session->ob_da_pq);
|
|
|
|
item->queued = 0;
|
|
|
|
return item;
|
|
}
|
|
|
|
/* Pop item only when concurrent connection limit is not
|
|
reached */
|
|
if(session_is_outgoing_concurrent_streams_max(session)) {
|
|
if(session->remote_window_size == 0 ||
|
|
nghttp2_pq_empty(&session->ob_da_pq)) {
|
|
return NULL;
|
|
}
|
|
|
|
item = nghttp2_pq_top(&session->ob_da_pq);
|
|
nghttp2_pq_pop(&session->ob_da_pq);
|
|
|
|
item->queued = 0;
|
|
|
|
return item;
|
|
}
|
|
|
|
item = nghttp2_pq_top(&session->ob_ss_pq);
|
|
nghttp2_pq_pop(&session->ob_ss_pq);
|
|
|
|
item->queued = 0;
|
|
|
|
return item;
|
|
}
|
|
|
|
if(nghttp2_pq_empty(&session->ob_ss_pq)) {
|
|
item = nghttp2_pq_top(&session->ob_pq);
|
|
nghttp2_pq_pop(&session->ob_pq);
|
|
|
|
item->queued = 0;
|
|
|
|
return item;
|
|
}
|
|
|
|
item = nghttp2_pq_top(&session->ob_pq);
|
|
headers_item = nghttp2_pq_top(&session->ob_ss_pq);
|
|
|
|
if(session_is_outgoing_concurrent_streams_max(session) ||
|
|
item->weight > headers_item->weight ||
|
|
(item->weight == headers_item->weight &&
|
|
item->seq < headers_item->seq)) {
|
|
nghttp2_pq_pop(&session->ob_pq);
|
|
|
|
item->queued = 0;
|
|
|
|
return item;
|
|
}
|
|
|
|
nghttp2_pq_pop(&session->ob_ss_pq);
|
|
|
|
headers_item->queued = 0;
|
|
|
|
return headers_item;
|
|
}
|
|
|
|
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 != 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 void session_outbound_item_cycle_weight(nghttp2_session *session,
|
|
nghttp2_outbound_item *item,
|
|
int32_t ini_weight)
|
|
{
|
|
if(item->weight == NGHTTP2_MIN_WEIGHT || item->weight > ini_weight) {
|
|
|
|
item->weight = ini_weight;
|
|
|
|
if(item->cycle == session->last_cycle) {
|
|
item->cycle = ++session->last_cycle;
|
|
} else {
|
|
item->cycle = session->last_cycle;
|
|
}
|
|
} else {
|
|
--item->weight;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called after a frame is sent.
|
|
*
|
|
* 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_sent(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;
|
|
|
|
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(fprintf(stderr, "send: next CONTINUATION frame, %zu bytes\n",
|
|
nghttp2_buf_len(&framebufs->cur->buf)));
|
|
|
|
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;
|
|
nghttp2_stream *stream =
|
|
nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if(!stream) {
|
|
break;
|
|
}
|
|
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. */
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_HCAT_PUSH_RESPONSE:
|
|
++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. */
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_PRIORITY: {
|
|
nghttp2_stream *stream;
|
|
stream = nghttp2_session_get_stream_raw(session, frame->hd.stream_id);
|
|
if(!stream) {
|
|
break;
|
|
}
|
|
/* Only update priority of the stream, only if it is not pushed
|
|
stream and is initiated by local peer, or it is pushed stream
|
|
and is initiated by remote peer */
|
|
if(((stream->flags & NGHTTP2_STREAM_FLAG_PUSH) == 0 &&
|
|
nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) ||
|
|
((stream->flags & NGHTTP2_STREAM_FLAG_PUSH) &&
|
|
!nghttp2_session_is_my_stream_id(session, frame->hd.stream_id))) {
|
|
rv = nghttp2_session_reprioritize_stream(session, stream,
|
|
&frame->priority.pri_spec);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
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;
|
|
}
|
|
break;
|
|
case NGHTTP2_GOAWAY:
|
|
session->goaway_flags |= NGHTTP2_GOAWAY_SEND;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
active_outbound_item_reset(&session->aob);
|
|
return 0;
|
|
} else {
|
|
nghttp2_outbound_item* next_item;
|
|
nghttp2_stream *stream;
|
|
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 -= frame->hd.length;
|
|
if(stream) {
|
|
stream->remote_window_size -= frame->hd.length;
|
|
}
|
|
|
|
if(stream && aux_data->eof) {
|
|
rv = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
/* Call on_frame_send_callback after
|
|
nghttp2_stream_detach_data(), 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;
|
|
}
|
|
}
|
|
} else if(session->callbacks.on_frame_send_callback) {
|
|
rv = session_call_on_frame_send(session, frame);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
/* On EOF, we have already detached data if stream is not NULL.
|
|
If stream is NULL, we cannot detach data. Please note that
|
|
application may issue nghttp2_submit_data() in
|
|
on_frame_send_callback, which attach data to stream. We don't
|
|
want to detach it. */
|
|
if(aux_data->eof) {
|
|
active_outbound_item_reset(aob);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* If session is closed or RST_STREAM was queued, we won't send
|
|
further data. */
|
|
if(nghttp2_session_predicate_data_send(session,
|
|
frame->hd.stream_id) != 0) {
|
|
if(stream) {
|
|
rv = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
active_outbound_item_reset(aob);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Assuming stream is not NULL */
|
|
assert(stream);
|
|
next_item = nghttp2_session_get_next_ob_item(session);
|
|
|
|
session_outbound_item_cycle_weight(session, aob->item,
|
|
stream->effective_weight);
|
|
|
|
/* If priority of this stream is higher or equal to other stream
|
|
waiting at the top of the queue, we continue to send this
|
|
data. */
|
|
if(stream->dpri == NGHTTP2_STREAM_DPRI_TOP &&
|
|
(next_item == NULL || outbound_item_compar(item, next_item) < 0)) {
|
|
size_t next_readmax;
|
|
|
|
next_readmax = nghttp2_session_next_data_read(session, stream);
|
|
|
|
if(next_readmax == 0) {
|
|
|
|
if(session->remote_window_size == 0 &&
|
|
stream->remote_window_size > 0) {
|
|
|
|
/* If DATA cannot be sent solely due to connection level
|
|
window size, just push item to queue again. We never pop
|
|
DATA item while connection level window size is 0. */
|
|
rv = nghttp2_pq_push(&session->ob_da_pq, aob->item);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
aob->item->queued = 1;
|
|
} else {
|
|
rv = nghttp2_stream_defer_data
|
|
(stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL,
|
|
&session->ob_da_pq, session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
aob->item = NULL;
|
|
active_outbound_item_reset(aob);
|
|
|
|
return 0;
|
|
}
|
|
|
|
nghttp2_bufs_reset(framebufs);
|
|
|
|
rv = nghttp2_session_pack_data(session, framebufs, next_readmax,
|
|
frame, aux_data);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
if(rv == NGHTTP2_ERR_DEFERRED) {
|
|
rv = nghttp2_stream_defer_data
|
|
(stream, NGHTTP2_STREAM_FLAG_DEFERRED_USER,
|
|
&session->ob_da_pq, session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
aob->item = NULL;
|
|
active_outbound_item_reset(aob);
|
|
|
|
return 0;
|
|
}
|
|
if(rv == NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE) {
|
|
/* Stop DATA frame chain and issue RST_STREAM to close the
|
|
stream. We don't return
|
|
NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE intentionally. */
|
|
rv = nghttp2_session_add_rst_stream(session,
|
|
frame->hd.stream_id,
|
|
NGHTTP2_INTERNAL_ERROR);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = nghttp2_stream_detach_data(stream, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
active_outbound_item_reset(aob);
|
|
|
|
return 0;
|
|
}
|
|
assert(rv == 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if(stream->dpri == NGHTTP2_STREAM_DPRI_TOP) {
|
|
rv = nghttp2_pq_push(&session->ob_da_pq, aob->item);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
aob->item->queued = 1;
|
|
}
|
|
|
|
aob->item = NULL;
|
|
active_outbound_item_reset(&session->aob);
|
|
return 0;
|
|
}
|
|
/* Unreachable */
|
|
assert(0);
|
|
return 0;
|
|
}
|
|
|
|
ssize_t nghttp2_session_mem_send(nghttp2_session *session,
|
|
const uint8_t **data_ptr)
|
|
{
|
|
int rv;
|
|
nghttp2_active_outbound_item *aob;
|
|
nghttp2_bufs *framebufs;
|
|
|
|
aob = &session->aob;
|
|
framebufs = &aob->framebufs;
|
|
|
|
*data_ptr = NULL;
|
|
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;
|
|
}
|
|
|
|
if(item->frame.hd.type == NGHTTP2_DATA) {
|
|
nghttp2_frame *frame;
|
|
nghttp2_stream *stream;
|
|
|
|
frame = &item->frame;
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
if(stream && stream->dpri != NGHTTP2_STREAM_DPRI_TOP) {
|
|
/* We have DATA with higher priority in queue within the
|
|
same dependency tree. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
rv = session_prep_frame(session, item);
|
|
if(rv == NGHTTP2_ERR_DEFERRED) {
|
|
DEBUGF(fprintf(stderr, "send: frame transmission deferred\n"));
|
|
break;
|
|
}
|
|
if(rv < 0) {
|
|
DEBUGF(fprintf(stderr, "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) {
|
|
if(session->callbacks.on_frame_not_send_callback
|
|
(session, frame, rv, session->user_data) != 0) {
|
|
|
|
nghttp2_outbound_item_free(item);
|
|
free(item);
|
|
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
}
|
|
nghttp2_outbound_item_free(item);
|
|
free(item);
|
|
active_outbound_item_reset(aob);
|
|
|
|
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(fprintf(stderr,
|
|
"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;
|
|
}
|
|
} else {
|
|
DEBUGF(fprintf(stderr, "send: next frame: DATA\n"));
|
|
}
|
|
|
|
DEBUGF(fprintf(stderr,
|
|
"send: start transmitting frame type=%u, length=%zd\n",
|
|
framebufs->cur->buf.pos[2],
|
|
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(fprintf(stderr, "send: end transmission of a frame\n"));
|
|
|
|
/* Frame has completely sent */
|
|
rv = session_after_frame_sent(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 datalen;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int nghttp2_session_send(nghttp2_session *session)
|
|
{
|
|
const uint8_t *data;
|
|
ssize_t datalen;
|
|
ssize_t sentlen;
|
|
nghttp2_bufs *framebufs;
|
|
|
|
framebufs = &session->aob.framebufs;
|
|
|
|
for(;;) {
|
|
datalen = nghttp2_session_mem_send(session, &data);
|
|
if(datalen <= 0) {
|
|
return (int)datalen;
|
|
}
|
|
sentlen = session->callbacks.send_callback(session, data, 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(fprintf(stderr, "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 != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_call_on_header(nghttp2_session *session,
|
|
const nghttp2_frame *frame,
|
|
const nghttp2_nv *nv)
|
|
{
|
|
int rv;
|
|
if(session->callbacks.on_header_callback) {
|
|
rv = session->callbacks.on_header_callback(session, frame,
|
|
nv->name, nv->namelen,
|
|
nv->value, nv->valuelen,
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
nghttp2_frame *frame)
|
|
{
|
|
/* 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 int session_handle_invalid_stream
|
|
(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
uint32_t error_code)
|
|
{
|
|
int rv;
|
|
rv = nghttp2_session_add_rst_stream(session, frame->hd.stream_id, 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, error_code, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int session_inflate_handle_invalid_stream
|
|
(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
uint32_t error_code)
|
|
{
|
|
int rv;
|
|
rv = session_handle_invalid_stream(session, frame, 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,
|
|
uint32_t error_code,
|
|
const char *reason)
|
|
{
|
|
if(session->callbacks.on_invalid_frame_recv_callback) {
|
|
if(session->callbacks.on_invalid_frame_recv_callback
|
|
(session, frame, error_code, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
return nghttp2_session_terminate_session_with_reason
|
|
(session, error_code, reason);
|
|
}
|
|
|
|
static int session_inflate_handle_invalid_connection
|
|
(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
uint32_t error_code,
|
|
const char *reason)
|
|
{
|
|
int rv;
|
|
rv = session_handle_invalid_connection(session, frame, 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_nv nv;
|
|
nghttp2_stream *stream;
|
|
|
|
*readlen_ptr = 0;
|
|
|
|
DEBUGF(fprintf(stderr, "recv: decoding header block %zu bytes\n", inlen));
|
|
for(;;) {
|
|
inflate_flags = 0;
|
|
proclen = nghttp2_hd_inflate_hd(&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) {
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
|
|
if(stream && 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, frame->hd.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 -= proclen;
|
|
*readlen_ptr += proclen;
|
|
|
|
DEBUGF(fprintf(stderr, "recv: proclen=%zd\n", proclen));
|
|
|
|
if(call_header_cb && (inflate_flags & NGHTTP2_HD_INFLATE_EMIT)) {
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Decompress header blocks of incoming request HEADERS and also call
|
|
* additional callbacks. This function can be called again if this
|
|
* function returns NGHTTP2_ERR_PAUSE.
|
|
*
|
|
* 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.
|
|
*/
|
|
int nghttp2_session_end_request_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream)
|
|
{
|
|
if(frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
|
|
}
|
|
/* Here we assume that stream is not shutdown in NGHTTP2_SHUT_WR */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Decompress header blocks of incoming (push-)response HEADERS and
|
|
* also call additional callbacks. This function can be called again
|
|
* if this function returns NGHTTP2_ERR_PAUSE.
|
|
*
|
|
* 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.
|
|
*/
|
|
int nghttp2_session_end_response_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream)
|
|
{
|
|
int rv;
|
|
if(frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
/* This is the last frame of this stream, so disallow
|
|
further receptions. */
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Decompress header blocks of incoming HEADERS and also call
|
|
* additional callbacks. This function can be called again if this
|
|
* function returns NGHTTP2_ERR_PAUSE.
|
|
*
|
|
* 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.
|
|
*/
|
|
int nghttp2_session_end_headers_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
nghttp2_stream *stream)
|
|
{
|
|
int rv;
|
|
if(frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
if(!nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
}
|
|
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;
|
|
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;
|
|
}
|
|
|
|
rv = session_call_on_frame_received(session, frame);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if(frame->hd.type != NGHTTP2_HEADERS) {
|
|
return 0;
|
|
}
|
|
|
|
switch(frame->headers.cat) {
|
|
case NGHTTP2_HCAT_REQUEST:
|
|
return nghttp2_session_end_request_headers_received
|
|
(session, frame, stream);
|
|
case NGHTTP2_HCAT_RESPONSE:
|
|
case NGHTTP2_HCAT_PUSH_RESPONSE:
|
|
return nghttp2_session_end_response_headers_received
|
|
(session, frame, stream);
|
|
case NGHTTP2_HCAT_HEADERS:
|
|
return nghttp2_session_end_headers_received(session, frame, stream);
|
|
default:
|
|
assert(0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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_PROTOCOL_ERROR,
|
|
"request HEADERS: stream_id == 0");
|
|
}
|
|
if(session->goaway_flags) {
|
|
/* We don't accept new stream after GOAWAY is sent or received. */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
if(!session_is_new_peer_stream_id(session, frame->hd.stream_id)) {
|
|
/* The spec says if an endpoint receives a HEADERS with invalid
|
|
stream ID, it MUST issue connection error with error code
|
|
PROTOCOL_ERROR */
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"request HEADERS: invalid stream_id");
|
|
}
|
|
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_ENHANCE_YOUR_CALM,
|
|
"request HEADERS: max concurrent streams exceeded");
|
|
}
|
|
|
|
if(frame->headers.pri_spec.stream_id == frame->hd.stream_id) {
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"request HEADERS: depend on itself");
|
|
}
|
|
|
|
if(session_is_incoming_concurrent_streams_pending_max(session)) {
|
|
return session_inflate_handle_invalid_stream
|
|
(session, frame, NGHTTP2_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;
|
|
}
|
|
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_PROTOCOL_ERROR,
|
|
"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.
|
|
*/
|
|
return session_inflate_handle_invalid_stream
|
|
(session, frame, NGHTTP2_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_PROTOCOL_ERROR,
|
|
"push response HEADERS: stream_id == 0");
|
|
}
|
|
if(session->goaway_flags) {
|
|
/* We don't accept new stream after GOAWAY is sent or received. */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
if(session_is_incoming_concurrent_streams_max(session)) {
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_ENHANCE_YOUR_CALM,
|
|
"push response HEADERS: max concurrent streams exceeded");
|
|
}
|
|
if(session_is_incoming_concurrent_streams_pending_max(session)) {
|
|
return session_inflate_handle_invalid_stream
|
|
(session, frame, NGHTTP2_REFUSED_STREAM);
|
|
}
|
|
|
|
nghttp2_stream_promise_fulfilled(stream);
|
|
++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_PROTOCOL_ERROR, "HEADERS: stream_id == 0");
|
|
}
|
|
if(stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
/* reserved. The valid push response HEADERS is processed by
|
|
nghttp2_session_on_push_response_headers_received(). This
|
|
generic HEADERS is called invalid cases for HEADERS against
|
|
reserved state. */
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "HEADERS: stream in reserved");
|
|
}
|
|
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.
|
|
*/
|
|
return session_inflate_handle_invalid_stream
|
|
(session, frame, NGHTTP2_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;
|
|
} else if(stream->state == NGHTTP2_STREAM_CLOSING) {
|
|
/* This is race condition. NGHTTP2_STREAM_CLOSING indicates
|
|
that we queued RST_STREAM but it has not been sent. It will
|
|
eventually sent, so we just ignore this frame. */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
} else {
|
|
return session_inflate_handle_invalid_stream
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR);
|
|
}
|
|
}
|
|
/* 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,
|
|
nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
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(nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
if(stream->state == NGHTTP2_STREAM_OPENING) {
|
|
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);
|
|
}
|
|
if(stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
frame->headers.cat = NGHTTP2_HCAT_PUSH_RESPONSE;
|
|
return nghttp2_session_on_push_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;
|
|
|
|
if(frame->hd.stream_id == 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "PRIORITY: stream_id == 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 session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "PRIORITY: stream in idle");
|
|
}
|
|
return 0;
|
|
}
|
|
if(state_reserved_remote(session, stream)) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "PRIORITY: stream in reserved");
|
|
}
|
|
/* Only update priority of the stream, only if it is not pushed
|
|
stream and is initiated by remote peer, or it is pushed stream
|
|
and is initiated by local peer */
|
|
if(((stream->flags & NGHTTP2_STREAM_FLAG_PUSH) == 0 &&
|
|
!nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) ||
|
|
((stream->flags & NGHTTP2_STREAM_FLAG_PUSH) &&
|
|
nghttp2_session_is_my_stream_id(session, frame->hd.stream_id))) {
|
|
|
|
rv = nghttp2_session_reprioritize_stream(session, stream,
|
|
&frame->priority.pri_spec);
|
|
|
|
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;
|
|
|
|
nghttp2_frame_unpack_priority_payload(&frame->priority,
|
|
iframe->sbuf.pos,
|
|
nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
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_PROTOCOL_ERROR, "RST_STREAM: stream_id == 0");
|
|
}
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if(!stream) {
|
|
if(session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "RST_STREAM: stream in idle");
|
|
}
|
|
}
|
|
|
|
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,
|
|
nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
return nghttp2_session_on_rst_stream_received(session, frame);
|
|
}
|
|
|
|
static int update_remote_initial_window_size_func
|
|
(nghttp2_map_entry *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_terminate_session(arg->session,
|
|
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 = nghttp2_stream_resume_deferred_data
|
|
(stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL,
|
|
&arg->session->ob_da_pq, arg->session->last_cycle);
|
|
|
|
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 = 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
|
|
(nghttp2_map_entry *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_terminate_session(arg->session,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
if(!(arg->session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE)) {
|
|
|
|
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;
|
|
int32_t header_table_size = -1;
|
|
uint8_t header_table_size_seen = 0;
|
|
/* Use the value last seen. */
|
|
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;
|
|
break;
|
|
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
|
|
new_initial_window_size = iv[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if(header_table_size_seen) {
|
|
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,
|
|
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_set_size = iv[i].value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
session->pending_local_max_concurrent_stream =
|
|
NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nghttp2_session_on_settings_received(nghttp2_session *session,
|
|
nghttp2_frame *frame,
|
|
int noack)
|
|
{
|
|
int rv;
|
|
size_t i;
|
|
|
|
if(frame->hd.stream_id != 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "SETTINGS: stream_id != 0");
|
|
}
|
|
if(frame->hd.flags & NGHTTP2_FLAG_ACK) {
|
|
if(frame->settings.niv != 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_FRAME_SIZE_ERROR,
|
|
"SETTINGS: ACK and payload != 0");
|
|
}
|
|
if(session->inflight_niv == -1) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "SETTINGS: unexpected ACK");
|
|
}
|
|
rv = nghttp2_session_update_local_settings(session, session->inflight_iv,
|
|
session->inflight_niv);
|
|
free(session->inflight_iv);
|
|
session->inflight_iv = NULL;
|
|
session->inflight_niv = -1;
|
|
if(rv != 0) {
|
|
uint32_t error_code = NGHTTP2_INTERNAL_ERROR;
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
if(rv == NGHTTP2_ERR_HEADER_COMP) {
|
|
error_code = NGHTTP2_COMPRESSION_ERROR;
|
|
}
|
|
return session_handle_invalid_connection
|
|
(session, frame, error_code, NULL);
|
|
}
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
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:
|
|
|
|
if(entry->value > NGHTTP2_MAX_HEADER_TABLE_SIZE) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_COMPRESSION_ERROR,
|
|
"SETTINGS: too large 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_COMPRESSION_ERROR, 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_PROTOCOL_ERROR,
|
|
"SETTINGS: invalid SETTINGS_ENBLE_PUSH");
|
|
}
|
|
|
|
if(!session->server && entry->value != 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"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_FLOW_CONTROL_ERROR,
|
|
"SETTINGS: too large SETTINGS_INITIAL_WINDOW_SIZE");
|
|
}
|
|
|
|
rv = session_update_remote_initial_window_size(session, entry->value);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if(rv != 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_FLOW_CONTROL_ERROR, 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_PROTOCOL_ERROR,
|
|
"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_set_size = entry->value;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!noack) {
|
|
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_INTERNAL_ERROR, NULL);
|
|
}
|
|
}
|
|
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
static int session_process_settings_frame(nghttp2_session *session)
|
|
{
|
|
int rv;
|
|
nghttp2_inbound_frame *iframe = &session->iframe;
|
|
nghttp2_frame *frame = &iframe->frame;
|
|
size_t i;
|
|
nghttp2_settings_entry min_header_size_entry;
|
|
|
|
min_header_size_entry = iframe->iv[NGHTTP2_INBOUND_NUM_IV - 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;
|
|
}
|
|
}
|
|
|
|
rv = nghttp2_frame_unpack_settings_payload(&frame->settings,
|
|
iframe->iv, iframe->niv);
|
|
if(rv != 0) {
|
|
assert(nghttp2_is_fatal(rv));
|
|
return rv;
|
|
}
|
|
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_PROTOCOL_ERROR, "PUSH_PROMISE: stream_id == 0");
|
|
}
|
|
if(session->server || session->local_settings.enable_push == 0) {
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "PUSH_PROMISE: push disabled");
|
|
}
|
|
if(session->goaway_flags) {
|
|
/* We just dicard PUSH_PROMISE after GOAWAY is sent or
|
|
received. */
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
if(!nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: invalid stream_id");
|
|
}
|
|
|
|
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_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: invalid promised_stream_id");
|
|
}
|
|
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) {
|
|
if(!stream) {
|
|
if(session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_inflate_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: stream in idle");
|
|
}
|
|
}
|
|
rv = nghttp2_session_add_rst_stream
|
|
(session, frame->push_promise.promised_stream_id,
|
|
NGHTTP2_REFUSED_STREAM);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
if(stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
if(session->callbacks.on_invalid_frame_recv_callback) {
|
|
if(session->callbacks.on_invalid_frame_recv_callback
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, session->user_data) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
}
|
|
rv = nghttp2_session_add_rst_stream
|
|
(session, frame->push_promise.promised_stream_id,
|
|
NGHTTP2_PROTOCOL_ERROR);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
|
|
}
|
|
|
|
/* TODO It is unclear reserved stream dpeneds on associated
|
|
stream with or without exclusive flag set */
|
|
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_PUSH,
|
|
&pri_spec,
|
|
NGHTTP2_STREAM_RESERVED,
|
|
NULL);
|
|
|
|
if(!promised_stream) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
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, nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
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_PROTOCOL_ERROR, "PING: stream_id != 0");
|
|
}
|
|
if((frame->hd.flags & NGHTTP2_FLAG_ACK) == 0) {
|
|
/* 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,
|
|
nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
return nghttp2_session_on_ping_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_goaway_received(nghttp2_session *session,
|
|
nghttp2_frame *frame)
|
|
{
|
|
if(frame->hd.stream_id != 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "GOAWAY: stream_id != 0");
|
|
}
|
|
/* Draft says Endpoints MUST NOT increase the value they send in the
|
|
last stream identifier. */
|
|
if(session->remote_last_stream_id < frame->goaway.last_stream_id) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"GOAWAY: invalid last_stream_id");
|
|
}
|
|
|
|
session->remote_last_stream_id = frame->goaway.last_stream_id;
|
|
session->goaway_flags |= NGHTTP2_GOAWAY_RECV;
|
|
return session_call_on_frame_received(session, frame);
|
|
}
|
|
|
|
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,
|
|
nghttp2_buf_len(&iframe->sbuf),
|
|
iframe->lbuf.pos,
|
|
nghttp2_buf_len(&iframe->lbuf));
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, NULL, 0);
|
|
|
|
return nghttp2_session_on_goaway_received(session, frame);
|
|
}
|
|
|
|
int nghttp2_session_on_altsvc_received(nghttp2_session *session,
|
|
nghttp2_frame *frame)
|
|
{
|
|
/* ALTSVC is exptected to be received by client only. We have
|
|
already rejected ALTSVC if it is received by server. */
|
|
if(frame->hd.stream_id != 0 &&
|
|
!nghttp2_session_is_my_stream_id(session, frame->hd.stream_id)) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR, "ALTSVC: invalid stream_id");
|
|
}
|
|
|
|
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;
|
|
int rv;
|
|
|
|
frame->ext.payload = &iframe->ext_frame_payload;
|
|
|
|
rv = nghttp2_frame_unpack_altsvc_payload(&frame->ext,
|
|
iframe->sbuf.pos,
|
|
nghttp2_buf_len(&iframe->sbuf),
|
|
iframe->lbuf.pos,
|
|
nghttp2_buf_len(&iframe->lbuf));
|
|
|
|
if(rv != 0) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_FRAME_SIZE_ERROR, "ALTSVC: could not unpack");
|
|
}
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, NULL, 0);
|
|
|
|
return nghttp2_session_on_altsvc_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 ||
|
|
NGHTTP2_MAX_WINDOW_SIZE - frame->window_update.window_size_increment <
|
|
session->remote_window_size) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_FLOW_CONTROL_ERROR, 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;
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if(!stream) {
|
|
if(session_detect_idle_stream(session, frame->hd.stream_id)) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"WINDOW_UPDATE to idle stream");
|
|
}
|
|
return 0;
|
|
}
|
|
if(stream->state == NGHTTP2_STREAM_RESERVED) {
|
|
return session_handle_invalid_connection
|
|
(session, frame, NGHTTP2_PROTOCOL_ERROR,
|
|
"WINDOW_UPADATE to reserved stream");
|
|
}
|
|
if(frame->window_update.window_size_increment == 0 ||
|
|
NGHTTP2_MAX_WINDOW_SIZE - frame->window_update.window_size_increment <
|
|
stream->remote_window_size) {
|
|
return session_handle_invalid_stream(session, frame,
|
|
NGHTTP2_FLOW_CONTROL_ERROR);
|
|
}
|
|
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 = nghttp2_stream_resume_deferred_data
|
|
(stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
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,
|
|
nghttp2_buf_len(&iframe->sbuf));
|
|
|
|
return nghttp2_session_on_window_update_received(session, frame);
|
|
}
|
|
|
|
/* static int get_error_code_from_lib_error_code(int lib_error_code) */
|
|
/* { */
|
|
/* switch(lib_error_code) { */
|
|
/* case NGHTTP2_ERR_HEADER_COMP: */
|
|
/* return NGHTTP2_COMPRESSION_ERROR; */
|
|
/* case NGHTTP2_ERR_FRAME_SIZE_ERROR: */
|
|
/* return NGHTTP2_FRAME_SIZE_ERROR; */
|
|
/* default: */
|
|
/* return NGHTTP2_PROTOCOL_ERROR; */
|
|
/* } */
|
|
/* } */
|
|
|
|
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;
|
|
}
|
|
|
|
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 += delta;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Accumulates received bytes |delta_size| for stream-level flow
|
|
* control and decides whether to send WINDOW_UPDATE to that stream.
|
|
* If NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE is set, WINDOW_UPDATE will not
|
|
* be sent.
|
|
*
|
|
* 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_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. */
|
|
if(send_window_update &&
|
|
!(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE)) {
|
|
/* We have to use local_settings here because it is the constraint
|
|
the remote endpoint should honor. */
|
|
if(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) {
|
|
stream->recv_window_size = 0;
|
|
} else {
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Accumulates received bytes |delta_size| for connection-level flow
|
|
* control and decides whether to send WINDOW_UPDATE to the
|
|
* connection. If NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE is set,
|
|
* WINDOW_UPDATE will not be sent.
|
|
*
|
|
* 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_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)) {
|
|
|
|
if(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,
|
|
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 += delta_size;
|
|
|
|
/* 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->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,
|
|
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;
|
|
|
|
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;
|
|
}
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if(!stream) {
|
|
if(session_detect_idle_stream(session, stream_id)) {
|
|
failure_reason = "DATA: stream in idle";
|
|
goto fail;
|
|
}
|
|
return NGHTTP2_ERR_IGN_PAYLOAD;
|
|
}
|
|
if(stream->shut_flags & NGHTTP2_SHUT_RD) {
|
|
failure_reason = "DATA: stream in half-closed(remote)";
|
|
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, NGHTTP2_PROTOCOL_ERROR, 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(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;
|
|
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:
|
|
break;
|
|
default:
|
|
DEBUGF(fprintf(stderr, "recv: ignore unknown settings id=0x%02x\n",
|
|
iv.settings_id));
|
|
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 &&
|
|
iv.value < iframe->iv[NGHTTP2_INBOUND_NUM_IV - 1].value) {
|
|
|
|
iframe->iv[NGHTTP2_INBOUND_NUM_IV - 1] = iv;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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(fprintf(stderr, "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 = iframe->sbuf.pos[0] + 1;
|
|
|
|
DEBUGF(fprintf(stderr, "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 padlen;
|
|
}
|
|
|
|
/*
|
|
* This function returns the effective payload length in the data of
|
|
* length |readlen| when the remaning 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;
|
|
} else {
|
|
return readlen - padlen;
|
|
}
|
|
}
|
|
return readlen;
|
|
}
|
|
|
|
ssize_t nghttp2_session_mem_recv(nghttp2_session *session,
|
|
const uint8_t *in, size_t inlen)
|
|
{
|
|
const uint8_t *first = in, *last = in + inlen;
|
|
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;
|
|
|
|
DEBUGF(fprintf(stderr,
|
|
"recv: connection recv_window_size=%d, local_window=%d\n",
|
|
session->recv_window_size, session->local_window_size));
|
|
|
|
for(;;) {
|
|
switch(iframe->state) {
|
|
case NGHTTP2_IB_READ_CLIENT_PREFACE:
|
|
readlen = nghttp2_min(inlen, iframe->payloadleft);
|
|
|
|
if(memcmp(NGHTTP2_CLIENT_CONNECTION_PREFACE +
|
|
NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN - iframe->payloadleft,
|
|
in, readlen) != 0) {
|
|
return NGHTTP2_ERR_BAD_PREFACE;
|
|
}
|
|
|
|
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(fprintf(stderr, "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) {
|
|
nghttp2_frame_unpack_frame_hd(&iframe->frame.hd, iframe->sbuf.pos);
|
|
iframe->payloadleft = iframe->frame.hd.length;
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR, "SETTINGS expected");
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_HEAD;
|
|
|
|
/* Fall through */
|
|
case NGHTTP2_IB_READ_HEAD: {
|
|
int on_begin_frame_called = 0;
|
|
|
|
DEBUGF(fprintf(stderr, "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(fprintf(stderr,
|
|
"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(fprintf(stderr,
|
|
"recv: length is too large %zu > %u\n",
|
|
iframe->frame.hd.length,
|
|
session->local_settings.max_frame_size));
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR, "too large frame size");
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
switch(iframe->frame.hd.type) {
|
|
case NGHTTP2_DATA: {
|
|
DEBUGF(fprintf(stderr, "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(rv == NGHTTP2_ERR_IGN_PAYLOAD) {
|
|
DEBUGF(fprintf(stderr, "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) {
|
|
iframe->state = NGHTTP2_IB_IGN_DATA;
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR,
|
|
"DATA: insufficient padding space");
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if(rv == 1) {
|
|
iframe->state = NGHTTP2_IB_READ_PAD_DATA;
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_DATA;
|
|
break;
|
|
}
|
|
case NGHTTP2_HEADERS:
|
|
|
|
DEBUGF(fprintf(stderr, "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) {
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR,
|
|
"HEADERS: insufficient padding space");
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
break;
|
|
}
|
|
|
|
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(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(fprintf(stderr, "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(fprintf(stderr, "recv: RST_STREAM\n"));
|
|
break;
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
DEBUGF(fprintf(stderr, "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(fprintf(stderr, "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;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_SETTINGS;
|
|
|
|
if(iframe->payloadleft) {
|
|
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(fprintf(stderr, "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) {
|
|
busy = 1;
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: insufficient padding space");
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
break;
|
|
}
|
|
|
|
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(fprintf(stderr, "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(fprintf(stderr, "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(fprintf(stderr, "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;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
case NGHTTP2_EXT_ALTSVC:
|
|
DEBUGF(fprintf(stderr, "recv: ALTSVC\n"));
|
|
|
|
iframe->frame.hd.flags = NGHTTP2_FLAG_NONE;
|
|
|
|
if(session->server) {
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR,
|
|
"ALTSVC: reserved for server only");
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
}
|
|
|
|
if(iframe->payloadleft < NGHTTP2_ALTSVC_MINLEN) {
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_FRAME_SIZE_ERROR;
|
|
|
|
break;
|
|
}
|
|
|
|
iframe->state = NGHTTP2_IB_READ_NBYTE;
|
|
inbound_frame_set_mark(iframe, NGHTTP2_ALTSVC_FIXED_PARTLEN);
|
|
|
|
break;
|
|
default:
|
|
DEBUGF(fprintf(stderr, "recv: unknown frame\n"));
|
|
|
|
/* Silently ignore unknown frame type. */
|
|
|
|
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:
|
|
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(fprintf(stderr, "recv: [IB_READ_NBYTE]\n"));
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
iframe->payloadleft -= readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "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)) {
|
|
padlen = inbound_frame_compute_pad(iframe);
|
|
if(padlen < 0) {
|
|
busy = 1;
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR, "HEADERS: invalid padding");
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
iframe->frame.headers.padlen = padlen;
|
|
|
|
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;
|
|
} 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(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:
|
|
rv = session_process_priority_frame(session);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_RST_STREAM:
|
|
rv = session_process_rst_stream_frame(session);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
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) {
|
|
busy = 1;
|
|
rv = nghttp2_session_terminate_session_with_reason
|
|
(session, NGHTTP2_PROTOCOL_ERROR,
|
|
"PUSH_PROMISE: invalid padding");
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
break;
|
|
}
|
|
|
|
iframe->frame.push_promise.padlen = 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(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;
|
|
}
|
|
|
|
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 = malloc(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;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_EXT_ALTSVC: {
|
|
size_t varlen;
|
|
|
|
varlen = iframe->frame.hd.length - NGHTTP2_ALTSVC_FIXED_PARTLEN;
|
|
|
|
if(varlen > 0) {
|
|
iframe->raw_lbuf = malloc(varlen);
|
|
|
|
if(iframe->raw_lbuf == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_buf_wrap_init(&iframe->lbuf, iframe->raw_lbuf, varlen);
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_ALTSVC;
|
|
|
|
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;
|
|
#ifdef DEBUGBUILD
|
|
if(iframe->state == NGHTTP2_IB_READ_HEADER_BLOCK) {
|
|
fprintf(stderr, "recv: [IB_READ_HEADER_BLOCK]\n");
|
|
} else {
|
|
fprintf(stderr, "recv: [IB_IGN_HEADER_BLOCK]\n");
|
|
}
|
|
#endif /* DEBUGBUILD */
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
|
|
DEBUGF(fprintf(stderr, "recv: readlen=%zu, payloadleft=%zu\n",
|
|
readlen, iframe->payloadleft - readlen));
|
|
|
|
data_readlen = inbound_frame_effective_readlen
|
|
(iframe, iframe->payloadleft - readlen, readlen);
|
|
if(data_readlen >= 0) {
|
|
size_t trail_padlen;
|
|
size_t hd_proclen = 0;
|
|
trail_padlen = nghttp2_frame_trail_padlen(&iframe->frame,
|
|
iframe->padlen);
|
|
DEBUGF(fprintf(stderr, "recv: block final=%d\n",
|
|
(iframe->frame.hd.flags &
|
|
NGHTTP2_FLAG_END_HEADERS) &&
|
|
iframe->payloadleft - data_readlen == trail_padlen));
|
|
|
|
rv = inflate_header_block
|
|
(session, &iframe->frame, &hd_proclen,
|
|
(uint8_t*)in, data_readlen,
|
|
(iframe->frame.hd.flags &
|
|
NGHTTP2_FLAG_END_HEADERS) &&
|
|
iframe->payloadleft - data_readlen == trail_padlen,
|
|
iframe->state == NGHTTP2_IB_READ_HEADER_BLOCK);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
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;
|
|
|
|
rv = nghttp2_session_add_rst_stream(session,
|
|
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(fprintf(stderr, "recv: [IB_IGN_PAYLOAD]\n"));
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "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(fprintf(stderr, "recv: [IB_FRAME_SIZE_ERROR]\n"));
|
|
|
|
rv = session_handle_frame_size_error(session, &iframe->frame);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_SETTINGS:
|
|
DEBUGF(fprintf(stderr, "recv: [IB_READ_SETTINGS]\n"));
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "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;
|
|
}
|
|
|
|
session_inbound_frame_reset(session);
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_GOAWAY_DEBUG:
|
|
case NGHTTP2_IB_READ_ALTSVC:
|
|
#ifdef DEBUGBUILD
|
|
if(iframe->state == NGHTTP2_IB_READ_GOAWAY_DEBUG) {
|
|
fprintf(stderr, "recv: [IB_READ_GOAWAY_DEBUG]\n");
|
|
} else {
|
|
fprintf(stderr, "recv: [IB_READ_ALTSVC]\n");
|
|
}
|
|
#endif /* DEBUGBUILD */
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
|
|
iframe->lbuf.last = nghttp2_cpymem(iframe->lbuf.last, in, readlen);
|
|
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "recv: readlen=%zu, payloadleft=%zu\n",
|
|
readlen, iframe->payloadleft));
|
|
|
|
if(iframe->payloadleft) {
|
|
assert(nghttp2_buf_avail(&iframe->lbuf) > 0);
|
|
|
|
break;
|
|
}
|
|
|
|
if(iframe->state == NGHTTP2_IB_READ_GOAWAY_DEBUG) {
|
|
rv = session_process_goaway_frame(session);
|
|
} else {
|
|
rv = session_process_altsvc_frame(session);
|
|
}
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
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(fprintf(stderr,
|
|
"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(fprintf(stderr,
|
|
"recv: expected stream_id=%d, type=%d, but "
|
|
"got stream_id=%d, type=%d\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;
|
|
}
|
|
|
|
busy = 1;
|
|
|
|
iframe->state = NGHTTP2_IB_IGN_PAYLOAD;
|
|
|
|
break;
|
|
}
|
|
|
|
/* CONTINUATION won't bear NGHTTP2_PADDED flag */
|
|
|
|
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(fprintf(stderr, "recv: [IB_READ_PAD_DATA]\n"));
|
|
|
|
readlen = inbound_frame_buf_read(iframe, in, last);
|
|
in += readlen;
|
|
iframe->payloadleft -= readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "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 = session_update_recv_connection_window_size(session, readlen);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
/* Pad Length field is consumed immediately */
|
|
rv = nghttp2_session_consume(session, iframe->frame.hd.stream_id,
|
|
readlen);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session,
|
|
iframe->frame.hd.stream_id);
|
|
if(stream) {
|
|
rv = 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;
|
|
}
|
|
iframe->state = NGHTTP2_IB_IGN_DATA;
|
|
break;
|
|
}
|
|
|
|
iframe->frame.data.padlen = padlen;
|
|
|
|
iframe->state = NGHTTP2_IB_READ_DATA;
|
|
|
|
break;
|
|
case NGHTTP2_IB_READ_DATA:
|
|
DEBUGF(fprintf(stderr, "recv: [IB_READ_DATA]\n"));
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "recv: readlen=%zu, payloadleft=%zu\n",
|
|
readlen, iframe->payloadleft));
|
|
|
|
if(readlen > 0) {
|
|
ssize_t data_readlen;
|
|
|
|
rv = session_update_recv_connection_window_size(session, readlen);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
stream = nghttp2_session_get_stream(session,
|
|
iframe->frame.hd.stream_id);
|
|
if(stream) {
|
|
rv = 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);
|
|
|
|
padlen = readlen - data_readlen;
|
|
|
|
if(padlen > 0) {
|
|
/* Padding is considered as "consumed" immediately */
|
|
rv = nghttp2_session_consume(session, iframe->frame.hd.stream_id,
|
|
padlen);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
DEBUGF(fprintf(stderr, "recv: data_readlen=%zu\n", data_readlen));
|
|
|
|
if(stream && data_readlen > 0 &&
|
|
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,
|
|
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(fprintf(stderr, "recv: [IB_IGN_DATA]\n"));
|
|
|
|
readlen = inbound_frame_payload_readlen(iframe, in, last);
|
|
iframe->payloadleft -= readlen;
|
|
in += readlen;
|
|
|
|
DEBUGF(fprintf(stderr, "recv: readlen=%zu, payloadleft=%zu\n",
|
|
readlen, iframe->payloadleft));
|
|
|
|
if(readlen > 0) {
|
|
/* Update connection-level flow control window for ignored
|
|
DATA frame too */
|
|
rv = session_update_recv_connection_window_size(session, readlen);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
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->payloadleft) {
|
|
break;
|
|
}
|
|
|
|
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, 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;
|
|
}
|
|
|
|
int nghttp2_session_want_read(nghttp2_session *session)
|
|
{
|
|
size_t num_active_streams;
|
|
|
|
/* If these flags are set, we don't want to read. The application
|
|
should drop the connection. */
|
|
if((session->goaway_flags & NGHTTP2_GOAWAY_FAIL_ON_SEND) &&
|
|
(session->goaway_flags & NGHTTP2_GOAWAY_SEND)) {
|
|
return 0;
|
|
}
|
|
|
|
num_active_streams = session_get_num_active_streams(session);
|
|
|
|
/* Unless GOAWAY is sent or received, we always want to read
|
|
incoming frames. After GOAWAY is sent or received, we are only
|
|
interested in active streams. */
|
|
|
|
if(num_active_streams > 0) {
|
|
return 1;
|
|
}
|
|
|
|
if(session->goaway_flags & (NGHTTP2_GOAWAY_SEND | NGHTTP2_GOAWAY_RECV)) {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int nghttp2_session_want_write(nghttp2_session *session)
|
|
{
|
|
size_t num_active_streams;
|
|
|
|
/* If these flags are set, we don't want to write any data. The
|
|
application should drop the connection. */
|
|
if((session->goaway_flags & NGHTTP2_GOAWAY_FAIL_ON_SEND) &&
|
|
(session->goaway_flags & NGHTTP2_GOAWAY_SEND)) {
|
|
return 0;
|
|
}
|
|
|
|
num_active_streams = session_get_num_active_streams(session);
|
|
|
|
/*
|
|
* Unless 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. After GOAWAY is sent or received, we want to write
|
|
* frames if there is pending ones AND there are active frames.
|
|
*/
|
|
|
|
if(session->aob.item == NULL &&
|
|
nghttp2_pq_empty(&session->ob_pq) &&
|
|
(nghttp2_pq_empty(&session->ob_da_pq) ||
|
|
session->remote_window_size == 0) &&
|
|
(nghttp2_pq_empty(&session->ob_ss_pq) ||
|
|
session_is_outgoing_concurrent_streams_max(session))) {
|
|
return 0;
|
|
}
|
|
|
|
if(num_active_streams > 0) {
|
|
return 1;
|
|
}
|
|
|
|
if(session->goaway_flags & (NGHTTP2_GOAWAY_SEND | NGHTTP2_GOAWAY_RECV)) {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
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;
|
|
|
|
item = malloc(sizeof(nghttp2_outbound_item));
|
|
if(item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_session_outbound_item_init(session, 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);
|
|
free(item);
|
|
return rv;
|
|
}
|
|
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)
|
|
{
|
|
int rv;
|
|
nghttp2_outbound_item *item;
|
|
nghttp2_frame *frame;
|
|
uint8_t *opaque_data_copy = NULL;
|
|
|
|
if(opaque_data_len) {
|
|
if(opaque_data_len + 8 > NGHTTP2_MAX_PAYLOADLEN) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
opaque_data_copy = malloc(opaque_data_len);
|
|
if(opaque_data_copy == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
memcpy(opaque_data_copy, opaque_data, opaque_data_len);
|
|
}
|
|
|
|
item = malloc(sizeof(nghttp2_outbound_item));
|
|
if(item == NULL) {
|
|
free(opaque_data_copy);
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_session_outbound_item_init(session, item);
|
|
|
|
frame = &item->frame;
|
|
|
|
nghttp2_frame_goaway_init(&frame->goaway, last_stream_id, error_code,
|
|
opaque_data_copy, opaque_data_len);
|
|
|
|
rv = nghttp2_session_add_item(session, item);
|
|
if(rv != 0) {
|
|
nghttp2_frame_goaway_free(&frame->goaway);
|
|
free(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;
|
|
|
|
item = malloc(sizeof(nghttp2_outbound_item));
|
|
if(item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
nghttp2_session_outbound_item_init(session, 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);
|
|
free(item);
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
if(flags & NGHTTP2_FLAG_ACK) {
|
|
if(niv != 0) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
} else if(session->inflight_niv != -1) {
|
|
return NGHTTP2_ERR_TOO_MANY_INFLIGHT_SETTINGS;
|
|
}
|
|
|
|
if(!nghttp2_iv_check(iv, niv)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
item = malloc(sizeof(nghttp2_outbound_item));
|
|
if(item == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
|
|
if(niv > 0) {
|
|
iv_copy = nghttp2_frame_iv_copy(iv, niv);
|
|
if(iv_copy == NULL) {
|
|
free(item);
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else {
|
|
iv_copy = NULL;
|
|
}
|
|
|
|
if((flags & NGHTTP2_FLAG_ACK) == 0) {
|
|
if(niv > 0) {
|
|
session->inflight_iv = nghttp2_frame_iv_copy(iv, niv);
|
|
|
|
if(session->inflight_iv == NULL) {
|
|
free(iv_copy);
|
|
free(item);
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
} else {
|
|
session->inflight_iv = NULL;
|
|
}
|
|
|
|
session->inflight_niv = niv;
|
|
}
|
|
|
|
nghttp2_session_outbound_item_init(session, 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));
|
|
|
|
if((flags & NGHTTP2_FLAG_ACK) == 0) {
|
|
free(session->inflight_iv);
|
|
session->inflight_iv = NULL;
|
|
session->inflight_niv = -1;
|
|
}
|
|
|
|
nghttp2_frame_settings_free(&frame->settings);
|
|
free(item);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* Extract NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS here and use
|
|
it to refuse the incoming streams 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;
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
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) {
|
|
nghttp2_stream *stream;
|
|
|
|
stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
|
|
if(!stream) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
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(fprintf(stderr, "send: read_length_callback=%zd\n", payloadlen));
|
|
|
|
payloadlen =
|
|
nghttp2_session_enforce_flow_control_limits(session, stream, payloadlen);
|
|
|
|
DEBUGF(fprintf(stderr,
|
|
"send: read_length_callback after flow control=%zd\n",
|
|
payloadlen));
|
|
|
|
if(payloadlen <= 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
if(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,
|
|
NGHTTP2_FRAME_HDLEN + 1 + payloadlen);
|
|
|
|
if(rv != 0) {
|
|
DEBUGF(fprintf(stderr, "send: realloc buffer failed rv=%d", rv));
|
|
/* If reallocation failed, old buffers are still in tact. So
|
|
use safe limit. */
|
|
payloadlen = datamax;
|
|
|
|
DEBUGF(fprintf(stderr, "send: use safe limit payloadlen=%zu",
|
|
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) >= (ssize_t)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) {
|
|
DEBUGF(fprintf(stderr, "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(aux_data->flags & NGHTTP2_FLAG_END_STREAM) {
|
|
frame->hd.flags |= NGHTTP2_FLAG_END_STREAM;
|
|
}
|
|
}
|
|
|
|
frame->hd.length = 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 = padded_payloadlen - payloadlen;
|
|
|
|
nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
|
|
|
|
rv = nghttp2_frame_add_pad(bufs, &frame->hd, frame->data.padlen);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
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;
|
|
stream = nghttp2_session_get_stream(session, stream_id);
|
|
if(!stream) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
stream->stream_user_data = stream_user_data;
|
|
return 0;
|
|
}
|
|
|
|
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_data(stream)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
rv = nghttp2_stream_resume_deferred_data
|
|
(stream, NGHTTP2_STREAM_FLAG_DEFERRED_USER, &session->ob_da_pq,
|
|
session->last_cycle);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
size_t nghttp2_session_get_outbound_queue_size(nghttp2_session *session)
|
|
{
|
|
return nghttp2_pq_size(&session->ob_pq) +
|
|
nghttp2_pq_size(&session->ob_ss_pq) + nghttp2_pq_size(&session->ob_da_pq);
|
|
}
|
|
|
|
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_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_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_set_size;
|
|
}
|
|
|
|
assert(0);
|
|
}
|
|
|
|
int nghttp2_session_upgrade(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;
|
|
|
|
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;
|
|
}
|
|
rv = nghttp2_frame_unpack_settings_payload2(&iv, &niv, settings_payload,
|
|
settings_payloadlen);
|
|
if(rv != 0) {
|
|
return rv;
|
|
}
|
|
|
|
if(session->server) {
|
|
memset(&frame.hd, 0, sizeof(frame.hd));
|
|
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);
|
|
}
|
|
free(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;
|
|
}
|
|
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->next_stream_id += 2;
|
|
}
|
|
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) {
|
|
rv = session_update_stream_consumed_size(session, stream, size);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|