489 lines
15 KiB
C
489 lines
15 KiB
C
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012, 2013 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_submit.h"
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#include <string.h>
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#include <assert.h>
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#include "nghttp2_session.h"
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#include "nghttp2_frame.h"
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#include "nghttp2_helper.h"
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#include "nghttp2_priority_spec.h"
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/* This function takes ownership of |nva_copy|. Regardless of the
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return value, the caller must not free |nva_copy| after this
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function returns. */
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static int32_t submit_headers_shared(nghttp2_session *session, uint8_t flags,
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int32_t stream_id,
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const nghttp2_priority_spec *pri_spec,
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nghttp2_nv *nva_copy, size_t nvlen,
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const nghttp2_data_provider *data_prd,
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void *stream_user_data,
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uint8_t attach_stream) {
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int rv;
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uint8_t flags_copy;
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nghttp2_outbound_item *item = NULL;
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nghttp2_frame *frame = NULL;
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nghttp2_headers_category hcat;
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nghttp2_mem *mem;
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mem = &session->mem;
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if (stream_id == 0) {
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rv = NGHTTP2_ERR_INVALID_ARGUMENT;
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goto fail;
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}
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item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
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if (item == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto fail;
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}
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nghttp2_session_outbound_item_init(session, item);
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if (data_prd != NULL && data_prd->read_callback != NULL) {
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item->aux_data.headers.data_prd = *data_prd;
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}
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item->aux_data.headers.stream_user_data = stream_user_data;
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item->aux_data.headers.attach_stream = attach_stream;
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flags_copy = (flags & (NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_PRIORITY)) |
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NGHTTP2_FLAG_END_HEADERS;
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if (stream_id == -1) {
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if (session->next_stream_id > INT32_MAX) {
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rv = NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
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goto fail;
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}
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stream_id = session->next_stream_id;
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session->next_stream_id += 2;
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hcat = NGHTTP2_HCAT_REQUEST;
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} else {
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/* More specific categorization will be done later. */
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hcat = NGHTTP2_HCAT_HEADERS;
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}
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frame = &item->frame;
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nghttp2_frame_headers_init(&frame->headers, flags_copy, stream_id, hcat,
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pri_spec, nva_copy, nvlen);
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rv = nghttp2_session_add_item(session, item);
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if (rv != 0) {
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nghttp2_frame_headers_free(&frame->headers, mem);
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goto fail2;
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}
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if (hcat == NGHTTP2_HCAT_REQUEST) {
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return stream_id;
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}
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return 0;
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fail:
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/* nghttp2_frame_headers_init() takes ownership of nva_copy. */
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nghttp2_nv_array_del(nva_copy, mem);
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fail2:
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nghttp2_mem_free(mem, item);
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return rv;
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}
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static void adjust_priority_spec_weight(nghttp2_priority_spec *pri_spec) {
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if (pri_spec->weight < NGHTTP2_MIN_WEIGHT) {
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pri_spec->weight = NGHTTP2_MIN_WEIGHT;
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} else if (pri_spec->weight > NGHTTP2_MAX_WEIGHT) {
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pri_spec->weight = NGHTTP2_MAX_WEIGHT;
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}
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}
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static int32_t submit_headers_shared_nva(nghttp2_session *session,
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uint8_t flags, int32_t stream_id,
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const nghttp2_priority_spec *pri_spec,
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const nghttp2_nv *nva, size_t nvlen,
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const nghttp2_data_provider *data_prd,
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void *stream_user_data,
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uint8_t attach_stream) {
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int rv;
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nghttp2_nv *nva_copy;
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nghttp2_priority_spec copy_pri_spec;
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nghttp2_mem *mem;
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mem = &session->mem;
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if (pri_spec) {
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copy_pri_spec = *pri_spec;
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adjust_priority_spec_weight(©_pri_spec);
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} else {
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nghttp2_priority_spec_default_init(©_pri_spec);
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}
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rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen, mem);
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if (rv < 0) {
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return rv;
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}
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return submit_headers_shared(session, flags, stream_id, ©_pri_spec,
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nva_copy, nvlen, data_prd, stream_user_data,
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attach_stream);
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}
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int32_t nghttp2_submit_trailer(nghttp2_session *session, int32_t stream_id,
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const nghttp2_nv *nva, size_t nvlen) {
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return submit_headers_shared_nva(session, NGHTTP2_FLAG_END_STREAM, stream_id,
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NULL, nva, nvlen, NULL, NULL, 0);
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}
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int32_t nghttp2_submit_headers(nghttp2_session *session, uint8_t flags,
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int32_t stream_id,
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const nghttp2_priority_spec *pri_spec,
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const nghttp2_nv *nva, size_t nvlen,
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void *stream_user_data) {
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flags &= NGHTTP2_FLAG_END_STREAM;
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if (pri_spec && !nghttp2_priority_spec_check_default(pri_spec)) {
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flags |= NGHTTP2_FLAG_PRIORITY;
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} else {
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pri_spec = NULL;
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}
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return submit_headers_shared_nva(session, flags, stream_id, pri_spec, nva,
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nvlen, NULL, stream_user_data, 0);
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}
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int nghttp2_submit_ping(nghttp2_session *session, uint8_t flags _U_,
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const uint8_t *opaque_data) {
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return nghttp2_session_add_ping(session, NGHTTP2_FLAG_NONE, opaque_data);
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}
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int nghttp2_submit_priority(nghttp2_session *session, uint8_t flags _U_,
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int32_t stream_id,
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const nghttp2_priority_spec *pri_spec) {
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int rv;
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nghttp2_outbound_item *item;
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nghttp2_frame *frame;
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nghttp2_priority_spec copy_pri_spec;
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nghttp2_mem *mem;
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mem = &session->mem;
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if (stream_id == 0 || pri_spec == NULL) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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if (stream_id == pri_spec->stream_id) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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copy_pri_spec = *pri_spec;
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adjust_priority_spec_weight(©_pri_spec);
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item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
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if (item == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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nghttp2_session_outbound_item_init(session, item);
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frame = &item->frame;
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nghttp2_frame_priority_init(&frame->priority, stream_id, ©_pri_spec);
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rv = nghttp2_session_add_item(session, item);
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if (rv != 0) {
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nghttp2_frame_priority_free(&frame->priority);
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nghttp2_mem_free(mem, item);
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return rv;
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}
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return 0;
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}
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int nghttp2_submit_rst_stream(nghttp2_session *session, uint8_t flags _U_,
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int32_t stream_id, uint32_t error_code) {
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if (stream_id == 0) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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return nghttp2_session_add_rst_stream(session, stream_id, error_code);
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}
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int nghttp2_submit_goaway(nghttp2_session *session, uint8_t flags _U_,
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int32_t last_stream_id, uint32_t error_code,
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const uint8_t *opaque_data, size_t opaque_data_len) {
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if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) {
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return 0;
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}
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return nghttp2_session_add_goaway(session, last_stream_id, error_code,
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opaque_data, opaque_data_len,
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NGHTTP2_GOAWAY_AUX_NONE);
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}
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int nghttp2_submit_shutdown_notice(nghttp2_session *session) {
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if (!session->server) {
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return NGHTTP2_ERR_INVALID_STATE;
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}
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if (session->goaway_flags) {
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return 0;
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}
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return nghttp2_session_add_goaway(session, (1u << 31) - 1, NGHTTP2_NO_ERROR,
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NULL, 0,
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NGHTTP2_GOAWAY_AUX_SHUTDOWN_NOTICE);
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}
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int nghttp2_submit_settings(nghttp2_session *session, uint8_t flags _U_,
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const nghttp2_settings_entry *iv, size_t niv) {
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return nghttp2_session_add_settings(session, NGHTTP2_FLAG_NONE, iv, niv);
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}
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int32_t nghttp2_submit_push_promise(nghttp2_session *session, uint8_t flags _U_,
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int32_t stream_id, const nghttp2_nv *nva,
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size_t nvlen,
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void *promised_stream_user_data) {
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nghttp2_outbound_item *item;
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nghttp2_frame *frame;
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nghttp2_nv *nva_copy;
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uint8_t flags_copy;
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int32_t promised_stream_id;
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int rv;
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nghttp2_mem *mem;
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mem = &session->mem;
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if (stream_id == 0 || nghttp2_session_is_my_stream_id(session, stream_id)) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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if (!session->server) {
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return NGHTTP2_ERR_PROTO;
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}
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/* All 32bit signed stream IDs are spent. */
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if (session->next_stream_id > INT32_MAX) {
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return NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
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}
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item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
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if (item == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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nghttp2_session_outbound_item_init(session, item);
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item->aux_data.headers.stream_user_data = promised_stream_user_data;
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frame = &item->frame;
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rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen, mem);
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if (rv < 0) {
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nghttp2_mem_free(mem, item);
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return rv;
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}
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flags_copy = NGHTTP2_FLAG_END_HEADERS;
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promised_stream_id = session->next_stream_id;
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session->next_stream_id += 2;
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nghttp2_frame_push_promise_init(&frame->push_promise, flags_copy, stream_id,
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promised_stream_id, nva_copy, nvlen);
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rv = nghttp2_session_add_item(session, item);
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if (rv != 0) {
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nghttp2_frame_push_promise_free(&frame->push_promise, mem);
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nghttp2_mem_free(mem, item);
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return rv;
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}
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return promised_stream_id;
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}
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int nghttp2_submit_window_update(nghttp2_session *session, uint8_t flags,
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int32_t stream_id,
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int32_t window_size_increment) {
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int rv;
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nghttp2_stream *stream = 0;
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if (window_size_increment == 0) {
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return 0;
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}
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flags = 0;
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if (stream_id == 0) {
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rv = nghttp2_adjust_local_window_size(
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&session->local_window_size, &session->recv_window_size,
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&session->recv_reduction, &window_size_increment);
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if (rv != 0) {
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return rv;
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}
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} else {
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stream = nghttp2_session_get_stream(session, stream_id);
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if (!stream) {
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return 0;
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}
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rv = nghttp2_adjust_local_window_size(
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&stream->local_window_size, &stream->recv_window_size,
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&stream->recv_reduction, &window_size_increment);
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if (rv != 0) {
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return rv;
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}
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}
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if (window_size_increment > 0) {
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if (stream_id == 0) {
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session->consumed_size =
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nghttp2_max(0, session->consumed_size - window_size_increment);
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} else {
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stream->consumed_size =
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nghttp2_max(0, stream->consumed_size - window_size_increment);
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}
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return nghttp2_session_add_window_update(session, flags, stream_id,
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window_size_increment);
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}
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return 0;
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}
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int nghttp2_submit_altsvc(nghttp2_session *session _U_, uint8_t flags _U_,
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int32_t stream_id _U_, uint32_t max_age _U_,
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uint16_t port _U_, const uint8_t *protocol_id _U_,
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size_t protocol_id_len _U_, const uint8_t *host _U_,
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size_t host_len _U_, const uint8_t *origin _U_,
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size_t origin_len _U_) {
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return 0;
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}
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static uint8_t set_request_flags(const nghttp2_priority_spec *pri_spec,
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const nghttp2_data_provider *data_prd) {
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uint8_t flags = NGHTTP2_FLAG_NONE;
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if (data_prd == NULL || data_prd->read_callback == NULL) {
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flags |= NGHTTP2_FLAG_END_STREAM;
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}
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if (pri_spec) {
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flags |= NGHTTP2_FLAG_PRIORITY;
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}
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return flags;
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}
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int32_t nghttp2_submit_request(nghttp2_session *session,
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const nghttp2_priority_spec *pri_spec,
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const nghttp2_nv *nva, size_t nvlen,
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const nghttp2_data_provider *data_prd,
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void *stream_user_data) {
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uint8_t flags;
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if (pri_spec && nghttp2_priority_spec_check_default(pri_spec)) {
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pri_spec = NULL;
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}
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flags = set_request_flags(pri_spec, data_prd);
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return submit_headers_shared_nva(session, flags, -1, pri_spec, nva, nvlen,
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data_prd, stream_user_data, 0);
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}
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static uint8_t set_response_flags(const nghttp2_data_provider *data_prd) {
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uint8_t flags = NGHTTP2_FLAG_NONE;
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if (data_prd == NULL || data_prd->read_callback == NULL) {
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flags |= NGHTTP2_FLAG_END_STREAM;
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}
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return flags;
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}
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int nghttp2_submit_response(nghttp2_session *session, int32_t stream_id,
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const nghttp2_nv *nva, size_t nvlen,
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const nghttp2_data_provider *data_prd) {
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uint8_t flags = set_response_flags(data_prd);
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return submit_headers_shared_nva(session, flags, stream_id, NULL, nva, nvlen,
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data_prd, NULL, 1);
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}
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int nghttp2_submit_data(nghttp2_session *session, uint8_t flags,
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int32_t stream_id,
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const nghttp2_data_provider *data_prd) {
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int rv;
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nghttp2_outbound_item *item;
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nghttp2_frame *frame;
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nghttp2_data_aux_data *aux_data;
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uint8_t nflags = flags & NGHTTP2_FLAG_END_STREAM;
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nghttp2_mem *mem;
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mem = &session->mem;
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if (stream_id == 0) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
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if (item == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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nghttp2_session_outbound_item_init(session, item);
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frame = &item->frame;
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aux_data = &item->aux_data.data;
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aux_data->data_prd = *data_prd;
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aux_data->eof = 0;
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aux_data->flags = nflags;
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/* flags are sent on transmission */
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nghttp2_frame_data_init(&frame->data, NGHTTP2_FLAG_NONE, stream_id);
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rv = nghttp2_session_add_item(session, item);
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if (rv != 0) {
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nghttp2_frame_data_free(&frame->data);
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nghttp2_mem_free(mem, item);
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return rv;
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}
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return 0;
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}
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ssize_t nghttp2_pack_settings_payload(uint8_t *buf, size_t buflen,
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const nghttp2_settings_entry *iv,
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size_t niv) {
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if (!nghttp2_iv_check(iv, niv)) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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if (buflen < (niv * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH)) {
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return NGHTTP2_ERR_INSUFF_BUFSIZE;
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}
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return nghttp2_frame_pack_settings_payload(buf, iv, niv);
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}
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