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nghttp2/lib/nghttp2_submit.c

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012, 2013 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "nghttp2_submit.h"
#include <string.h>
#include <assert.h>
#include "nghttp2_session.h"
#include "nghttp2_frame.h"
#include "nghttp2_helper.h"
#include "nghttp2_priority_spec.h"
/* This function takes ownership of |nva_copy|. Regardless of the
return value, the caller must not free |nva_copy| after this
function returns. */
static int nghttp2_submit_headers_shared
(nghttp2_session *session,
uint8_t flags,
int32_t stream_id,
const nghttp2_priority_spec *pri_spec,
nghttp2_nv *nva_copy,
size_t nvlen,
const nghttp2_data_provider *data_prd,
void *stream_user_data)
{
int rv;
uint8_t flags_copy;
nghttp2_frame *frame = NULL;
nghttp2_data_provider *data_prd_copy = NULL;
nghttp2_headers_aux_data *aux_data = NULL;
if(data_prd != NULL && data_prd->read_callback != NULL) {
data_prd_copy = malloc(sizeof(nghttp2_data_provider));
if(data_prd_copy == NULL) {
rv = NGHTTP2_ERR_NOMEM;
goto fail;
}
*data_prd_copy = *data_prd;
}
if(data_prd || stream_user_data) {
aux_data = malloc(sizeof(nghttp2_headers_aux_data));
if(aux_data == NULL) {
rv = NGHTTP2_ERR_NOMEM;
goto fail;
}
aux_data->data_prd = data_prd_copy;
aux_data->stream_user_data = stream_user_data;
}
frame = malloc(sizeof(nghttp2_frame));
if(frame == NULL) {
rv = NGHTTP2_ERR_NOMEM;
goto fail;
}
flags_copy =
(flags & (NGHTTP2_FLAG_END_STREAM |
NGHTTP2_FLAG_END_SEGMENT |
NGHTTP2_FLAG_PRIORITY)) |
NGHTTP2_FLAG_END_HEADERS;
nghttp2_frame_headers_init(&frame->headers, flags_copy, stream_id, pri_spec,
nva_copy, nvlen);
rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame,
aux_data);
if(rv != 0) {
nghttp2_frame_headers_free(&frame->headers);
goto fail2;
}
return 0;
fail:
/* nghttp2_frame_headers_init() takes ownership of nva_copy. */
nghttp2_nv_array_del(nva_copy);
fail2:
free(frame);
free(aux_data);
free(data_prd_copy);
return rv;
}
static void adjust_priority_spec_weight(nghttp2_priority_spec *pri_spec)
{
if(pri_spec->weight < NGHTTP2_MIN_WEIGHT) {
pri_spec->weight = NGHTTP2_MIN_WEIGHT;
} else if(pri_spec->weight > NGHTTP2_MAX_WEIGHT) {
pri_spec->weight = NGHTTP2_MAX_WEIGHT;
}
}
static int nghttp2_submit_headers_shared_nva
(nghttp2_session *session,
uint8_t flags,
int32_t stream_id,
const nghttp2_priority_spec *pri_spec,
const nghttp2_nv *nva,
size_t nvlen,
const nghttp2_data_provider *data_prd,
void *stream_user_data)
{
ssize_t rv;
nghttp2_nv *nva_copy;
nghttp2_priority_spec copy_pri_spec;
if(pri_spec) {
copy_pri_spec = *pri_spec;
adjust_priority_spec_weight(&copy_pri_spec);
} else {
nghttp2_priority_spec_default_init(&copy_pri_spec);
}
rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen);
if(rv < 0) {
return rv;
}
return nghttp2_submit_headers_shared(session, flags, stream_id,
&copy_pri_spec, nva_copy, rv, data_prd,
stream_user_data);
}
int nghttp2_submit_headers(nghttp2_session *session, uint8_t flags,
int32_t stream_id,
const nghttp2_priority_spec *pri_spec,
const nghttp2_nv *nva, size_t nvlen,
void *stream_user_data)
{
flags &= NGHTTP2_FLAG_END_STREAM;
if(pri_spec && !nghttp2_priority_spec_check_default(pri_spec)) {
flags |= NGHTTP2_FLAG_PRIORITY;
} else {
pri_spec = NULL;
}
return nghttp2_submit_headers_shared_nva(session, flags, stream_id, pri_spec,
nva, nvlen, NULL, stream_user_data);
}
int nghttp2_submit_ping(nghttp2_session *session, uint8_t flags,
uint8_t *opaque_data)
{
return nghttp2_session_add_ping(session, NGHTTP2_FLAG_NONE, opaque_data);
}
int nghttp2_submit_priority(nghttp2_session *session, uint8_t flags,
int32_t stream_id,
const nghttp2_priority_spec *pri_spec)
{
int rv;
nghttp2_frame *frame;
nghttp2_priority_spec copy_pri_spec;
if(pri_spec == NULL) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if(stream_id == pri_spec->stream_id) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
copy_pri_spec = *pri_spec;
adjust_priority_spec_weight(&copy_pri_spec);
frame = malloc(sizeof(nghttp2_frame));
if(frame == NULL) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_frame_priority_init(&frame->priority, stream_id, &copy_pri_spec);
rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame, NULL);
if(rv != 0) {
nghttp2_frame_priority_free(&frame->priority);
free(frame);
return rv;
}
return 0;
}
int nghttp2_submit_rst_stream(nghttp2_session *session, uint8_t flags,
int32_t stream_id,
nghttp2_error_code error_code)
{
return nghttp2_session_add_rst_stream(session, stream_id, error_code);
}
int nghttp2_submit_goaway(nghttp2_session *session, uint8_t flags,
nghttp2_error_code error_code,
const uint8_t *opaque_data, size_t opaque_data_len)
{
return nghttp2_session_add_goaway(session, session->last_stream_id,
error_code, opaque_data, opaque_data_len);
}
int nghttp2_submit_settings(nghttp2_session *session, uint8_t flags,
const nghttp2_settings_entry *iv, size_t niv)
{
return nghttp2_session_add_settings(session, NGHTTP2_FLAG_NONE, iv, niv);
}
int nghttp2_submit_push_promise(nghttp2_session *session, uint8_t flags,
int32_t stream_id,
const nghttp2_nv *nva, size_t nvlen,
void *promised_stream_user_data)
{
nghttp2_frame *frame;
nghttp2_nv *nva_copy;
uint8_t flags_copy;
nghttp2_headers_aux_data *aux_data = NULL;
int rv;
if(!session->server) {
return NGHTTP2_ERR_PROTO;
}
frame = malloc(sizeof(nghttp2_frame));
if(frame == NULL) {
return NGHTTP2_ERR_NOMEM;
}
if(promised_stream_user_data) {
aux_data = malloc(sizeof(nghttp2_headers_aux_data));
if(aux_data == NULL) {
free(frame);
return NGHTTP2_ERR_NOMEM;
}
aux_data->data_prd = NULL;
aux_data->stream_user_data = promised_stream_user_data;
}
rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen);
if(rv < 0) {
free(aux_data);
free(frame);
return rv;
}
flags_copy = NGHTTP2_FLAG_END_HEADERS;
nghttp2_frame_push_promise_init(&frame->push_promise, flags_copy,
stream_id, -1, nva_copy, nvlen);
rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame, aux_data);
if(rv != 0) {
nghttp2_frame_push_promise_free(&frame->push_promise);
free(aux_data);
free(frame);
}
return 0;
}
int nghttp2_submit_window_update(nghttp2_session *session, uint8_t flags,
int32_t stream_id,
int32_t window_size_increment)
{
int rv;
nghttp2_stream *stream;
if(window_size_increment == 0) {
return 0;
}
flags = 0;
if(stream_id == 0) {
rv = nghttp2_adjust_local_window_size(&session->local_window_size,
&session->recv_window_size,
&session->recv_reduction,
&window_size_increment);
if(rv != 0) {
return rv;
}
} else {
stream = nghttp2_session_get_stream(session, stream_id);
if(stream) {
rv = nghttp2_adjust_local_window_size(&stream->local_window_size,
&stream->recv_window_size,
&stream->recv_reduction,
&window_size_increment);
if(rv != 0) {
return rv;
}
} else {
return 0;
}
}
if(window_size_increment > 0) {
return nghttp2_session_add_window_update(session, flags, stream_id,
window_size_increment);
}
return 0;
}
int nghttp2_submit_altsvc(nghttp2_session *session, uint8_t flags,
int32_t stream_id,
uint32_t max_age, uint16_t port,
const uint8_t *protocol_id, size_t protocol_id_len,
const uint8_t *host, size_t host_len,
const uint8_t *origin, size_t origin_len)
{
int rv;
size_t varlen;
uint8_t *var, *varp;
nghttp2_frame *frame;
uint8_t *copy_protocol_id, *copy_host, *copy_origin;
if(!session->server) {
return NGHTTP2_ERR_PROTO;
}
varlen = protocol_id_len + host_len + origin_len;
/* 9 = fixed part 8 bytes + HOST_LEN 1 byte */
if(varlen + 9 > NGHTTP2_MAX_PAYLOADLEN) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if(varlen == 0) {
var = NULL;
copy_protocol_id = NULL;
copy_host = NULL;
copy_origin = NULL;
} else {
var = malloc(varlen);
if(var == NULL) {
return NGHTTP2_ERR_NOMEM;
}
varp = var;
memcpy(varp, protocol_id, protocol_id_len);
copy_protocol_id = varp;
varp += protocol_id_len;
memcpy(varp, host, host_len);
copy_host = varp;
varp += host_len;
memcpy(varp, origin, origin_len);
copy_origin = varp;
varp += origin_len;
}
frame = malloc(sizeof(nghttp2_frame));
if(frame == NULL) {
free(var);
return NGHTTP2_ERR_NOMEM;
}
nghttp2_frame_altsvc_init(&frame->altsvc, stream_id, max_age, port,
copy_protocol_id, protocol_id_len,
copy_host, host_len, copy_origin, origin_len);
rv = nghttp2_session_add_frame(session, NGHTTP2_CAT_CTRL, frame, NULL);
if(rv != 0) {
nghttp2_frame_altsvc_free(&frame->altsvc);
free(frame);
return rv;
}
return 0;
}
static uint8_t set_request_flags(const nghttp2_priority_spec *pri_spec,
const nghttp2_data_provider *data_prd)
{
uint8_t flags = NGHTTP2_FLAG_NONE;
if(data_prd == NULL || data_prd->read_callback == NULL) {
flags |= NGHTTP2_FLAG_END_STREAM;
}
if(pri_spec) {
flags |= NGHTTP2_FLAG_PRIORITY;
}
return flags;
}
int nghttp2_submit_request(nghttp2_session *session,
const nghttp2_priority_spec *pri_spec,
const nghttp2_nv *nva, size_t nvlen,
const nghttp2_data_provider *data_prd,
void *stream_user_data)
{
uint8_t flags;
if(pri_spec && nghttp2_priority_spec_check_default(pri_spec)) {
pri_spec = NULL;
}
flags = set_request_flags(pri_spec, data_prd);
return nghttp2_submit_headers_shared_nva(session, flags, -1, pri_spec,
nva, nvlen,
data_prd, stream_user_data);
}
static uint8_t set_response_flags(const nghttp2_data_provider *data_prd)
{
uint8_t flags = NGHTTP2_FLAG_NONE;
if(data_prd == NULL || data_prd->read_callback == NULL) {
flags |= NGHTTP2_FLAG_END_STREAM;
}
return flags;
}
int nghttp2_submit_response(nghttp2_session *session,
int32_t stream_id,
const nghttp2_nv *nva, size_t nvlen,
const nghttp2_data_provider *data_prd)
{
uint8_t flags = set_response_flags(data_prd);
return nghttp2_submit_headers_shared_nva(session, flags, stream_id,
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);
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);
}
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