574 lines
15 KiB
C
574 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
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(nghttp2_session *session,
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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,
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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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{
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int rv;
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uint8_t flags_copy;
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nghttp2_frame *frame = NULL;
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nghttp2_data_provider *data_prd_copy = NULL;
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nghttp2_headers_aux_data *aux_data = NULL;
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nghttp2_headers_category hcat;
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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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if(data_prd != NULL && data_prd->read_callback != NULL) {
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data_prd_copy = malloc(sizeof(nghttp2_data_provider));
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if(data_prd_copy == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto fail;
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}
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*data_prd_copy = *data_prd;
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}
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if(data_prd || stream_user_data) {
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aux_data = malloc(sizeof(nghttp2_headers_aux_data));
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if(aux_data == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto fail;
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}
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aux_data->data_prd = data_prd_copy;
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aux_data->stream_user_data = stream_user_data;
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}
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frame = malloc(sizeof(nghttp2_frame));
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if(frame == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto fail;
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}
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flags_copy =
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(flags & (NGHTTP2_FLAG_END_STREAM |
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NGHTTP2_FLAG_END_SEGMENT |
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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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nghttp2_frame_headers_init(&frame->headers, flags_copy, stream_id,
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hcat, pri_spec, nva_copy, nvlen);
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rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame,
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aux_data);
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if(rv != 0) {
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nghttp2_frame_headers_free(&frame->headers);
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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);
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fail2:
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free(frame);
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free(aux_data);
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free(data_prd_copy);
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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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{
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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
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(nghttp2_session *session,
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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,
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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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{
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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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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);
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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,
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©_pri_spec, nva_copy, nvlen, data_prd,
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stream_user_data);
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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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{
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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,
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nva, nvlen, NULL, stream_user_data);
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}
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int nghttp2_submit_ping(nghttp2_session *session, uint8_t flags,
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const uint8_t *opaque_data)
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{
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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,
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int32_t stream_id,
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const nghttp2_priority_spec *pri_spec)
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{
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int rv;
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nghttp2_frame *frame;
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nghttp2_priority_spec copy_pri_spec;
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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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frame = malloc(sizeof(nghttp2_frame));
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if(frame == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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nghttp2_frame_priority_init(&frame->priority, stream_id, ©_pri_spec);
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rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame, NULL);
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if(rv != 0) {
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nghttp2_frame_priority_free(&frame->priority);
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free(frame);
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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,
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int32_t stream_id,
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nghttp2_error_code error_code)
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{
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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,
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int32_t last_stream_id,
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nghttp2_error_code error_code,
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const uint8_t *opaque_data, size_t opaque_data_len)
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{
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return nghttp2_session_add_goaway(session, last_stream_id,
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error_code, opaque_data, opaque_data_len);
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}
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int nghttp2_submit_settings(nghttp2_session *session, uint8_t flags,
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const nghttp2_settings_entry *iv, size_t niv)
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{
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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,
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int32_t stream_id,
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const nghttp2_nv *nva, size_t nvlen,
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void *promised_stream_user_data)
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{
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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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nghttp2_headers_aux_data *aux_data = NULL;
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int32_t promised_stream_id;
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int rv;
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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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if(!session->server) {
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return NGHTTP2_ERR_PROTO;
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}
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frame = malloc(sizeof(nghttp2_frame));
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if(frame == NULL) {
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return NGHTTP2_ERR_NOMEM;
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}
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if(promised_stream_user_data) {
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aux_data = malloc(sizeof(nghttp2_headers_aux_data));
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if(aux_data == NULL) {
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free(frame);
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return NGHTTP2_ERR_NOMEM;
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}
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aux_data->data_prd = NULL;
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aux_data->stream_user_data = promised_stream_user_data;
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}
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rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen);
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if(rv < 0) {
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free(aux_data);
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free(frame);
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return rv;
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}
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flags_copy = NGHTTP2_FLAG_END_HEADERS;
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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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free(aux_data);
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free(frame);
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return NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
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}
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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,
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stream_id, promised_stream_id,
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nva_copy, nvlen);
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rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame, aux_data);
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if(rv != 0) {
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nghttp2_frame_push_promise_free(&frame->push_promise);
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free(aux_data);
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free(frame);
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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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{
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int rv;
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nghttp2_stream *stream;
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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(&session->local_window_size,
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&session->recv_window_size,
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&session->recv_reduction,
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&window_size_increment);
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if(rv != 0) {
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return rv;
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}
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/* recv_ign_window_size keeps track of ignored DATA bytes before
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any connection-level WINDOW_UPDATE therefore, we can reset it
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here. */
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session->recv_ign_window_size = 0;
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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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rv = nghttp2_adjust_local_window_size(&stream->local_window_size,
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&stream->recv_window_size,
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&stream->recv_reduction,
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&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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return 0;
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}
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}
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if(window_size_increment > 0) {
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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, uint8_t flags,
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int32_t stream_id,
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uint32_t max_age, uint16_t port,
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const uint8_t *protocol_id, size_t protocol_id_len,
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const uint8_t *host, size_t host_len,
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const uint8_t *origin, size_t origin_len)
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{
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int rv;
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size_t varlen;
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uint8_t *var, *varp;
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nghttp2_frame *frame;
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nghttp2_ext_altsvc *altsvc;
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uint8_t *copy_protocol_id, *copy_host, *copy_origin;
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if(!session->server) {
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return NGHTTP2_ERR_PROTO;
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}
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varlen = protocol_id_len + host_len + origin_len;
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/* 9 = fixed part 8 bytes + HOST_LEN 1 byte */
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if(varlen + 9 > NGHTTP2_MAX_PAYLOADLEN) {
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return NGHTTP2_ERR_INVALID_ARGUMENT;
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}
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altsvc = malloc(sizeof(nghttp2_ext_altsvc));
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if(altsvc == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto fail;
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}
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if(varlen == 0) {
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var = NULL;
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copy_protocol_id = NULL;
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copy_host = NULL;
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copy_origin = NULL;
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} else {
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var = malloc(varlen);
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if(var == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto var_alloc_fail;
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}
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varp = var;
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memcpy(varp, protocol_id, protocol_id_len);
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copy_protocol_id = varp;
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varp += protocol_id_len;
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memcpy(varp, host, host_len);
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copy_host = varp;
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varp += host_len;
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memcpy(varp, origin, origin_len);
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copy_origin = varp;
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}
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frame = malloc(sizeof(nghttp2_frame));
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if(frame == NULL) {
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rv = NGHTTP2_ERR_NOMEM;
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goto frame_alloc_fail;
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}
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frame->ext.payload = altsvc;
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nghttp2_frame_altsvc_init(&frame->ext, stream_id, max_age, port,
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copy_protocol_id, protocol_id_len,
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copy_host, host_len, copy_origin, origin_len);
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rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame, NULL);
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if(rv != 0) {
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nghttp2_frame_altsvc_free(&frame->ext);
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free(frame);
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free(altsvc);
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return rv;
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}
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return 0;
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frame_alloc_fail:
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free(var);
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var_alloc_fail:
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free(altsvc);
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fail:
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return rv;
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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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{
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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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{
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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,
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nva, nvlen,
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data_prd, stream_user_data);
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}
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static uint8_t set_response_flags(const nghttp2_data_provider *data_prd)
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{
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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,
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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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{
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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,
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NULL, nva, nvlen,
|
|
data_prd, NULL);
|
|
}
|
|
|
|
int nghttp2_submit_data(nghttp2_session *session, uint8_t flags,
|
|
int32_t stream_id,
|
|
const nghttp2_data_provider *data_prd)
|
|
{
|
|
int rv;
|
|
nghttp2_private_data *data_frame;
|
|
uint8_t nflags = flags & (NGHTTP2_FLAG_END_STREAM |
|
|
NGHTTP2_FLAG_END_SEGMENT);
|
|
|
|
if(stream_id == 0) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
data_frame = malloc(sizeof(nghttp2_private_data));
|
|
if(data_frame == NULL) {
|
|
return NGHTTP2_ERR_NOMEM;
|
|
}
|
|
nghttp2_frame_private_data_init(data_frame, nflags, stream_id, data_prd);
|
|
rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_DATA, data_frame, NULL);
|
|
if(rv != 0) {
|
|
nghttp2_frame_private_data_free(data_frame);
|
|
free(data_frame);
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
ssize_t nghttp2_pack_settings_payload(uint8_t *buf,
|
|
size_t buflen,
|
|
const nghttp2_settings_entry *iv,
|
|
size_t niv)
|
|
{
|
|
if(!nghttp2_iv_check(iv, niv)) {
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
if(buflen < (niv * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH)) {
|
|
return NGHTTP2_ERR_INSUFF_BUFSIZE;
|
|
}
|
|
|
|
return nghttp2_frame_pack_settings_payload(buf, iv, niv);
|
|
}
|