/*
* 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"
/*
* Detects the dependency error, that is stream attempted to depend on
* itself. If |stream_id| is -1, we use session->next_stream_id as
* stream ID.
*
* This function returns 0 if it succeeds, or one of the following
* error codes:
*
* NGHTTP2_ERR_INVALID_ARGUMENT
* Stream attempted to depend on itself.
*/
static int detect_self_dependency(nghttp2_session *session, int32_t stream_id,
const nghttp2_priority_spec *pri_spec) {
assert(pri_spec);
if (stream_id == -1) {
if ((int32_t)session->next_stream_id == pri_spec->stream_id) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
return 0;
}
if (stream_id == pri_spec->stream_id) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
return 0;
}
/* This function takes ownership of |nva_copy|. Regardless of the
return value, the caller must not free |nva_copy| after this
function returns. */
static int32_t 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_outbound_item *item = NULL;
nghttp2_frame *frame = NULL;
nghttp2_headers_category hcat;
nghttp2_mem *mem;
mem = &session->mem;
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
rv = NGHTTP2_ERR_NOMEM;
goto fail;
}
nghttp2_outbound_item_init(item);
if (data_prd != NULL && data_prd->read_callback != NULL) {
item->aux_data.headers.data_prd = *data_prd;
}
item->aux_data.headers.stream_user_data = stream_user_data;
flags_copy =
(uint8_t)((flags & (NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_PRIORITY)) |
NGHTTP2_FLAG_END_HEADERS);
if (stream_id == -1) {
if (session->next_stream_id > INT32_MAX) {
rv = NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
goto fail;
}
stream_id = (int32_t)session->next_stream_id;
session->next_stream_id += 2;
hcat = NGHTTP2_HCAT_REQUEST;
} else {
/* More specific categorization will be done later. */
hcat = NGHTTP2_HCAT_HEADERS;
}
frame = &item->frame;
nghttp2_frame_headers_init(&frame->headers, flags_copy, stream_id, hcat,
pri_spec, nva_copy, nvlen);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_headers_free(&frame->headers, mem);
goto fail2;
}
if (hcat == NGHTTP2_HCAT_REQUEST) {
return stream_id;
}
return 0;
fail:
/* nghttp2_frame_headers_init() takes ownership of nva_copy. */
nghttp2_nv_array_del(nva_copy, mem);
fail2:
nghttp2_mem_free(mem, item);
return rv;
}
static int32_t 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) {
int rv;
nghttp2_nv *nva_copy;
nghttp2_priority_spec copy_pri_spec;
nghttp2_mem *mem;
mem = &session->mem;
if (pri_spec) {
copy_pri_spec = *pri_spec;
nghttp2_priority_spec_normalize_weight(©_pri_spec);
} else {
nghttp2_priority_spec_default_init(©_pri_spec);
}
rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen, mem);
if (rv < 0) {
return rv;
}
return submit_headers_shared(session, flags, stream_id, ©_pri_spec,
nva_copy, nvlen, data_prd, stream_user_data);
}
int nghttp2_submit_trailer(nghttp2_session *session, int32_t stream_id,
const nghttp2_nv *nva, size_t nvlen) {
if (stream_id <= 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
return (int)submit_headers_shared_nva(session, NGHTTP2_FLAG_END_STREAM,
stream_id, NULL, nva, nvlen, NULL,
NULL);
}
int32_t 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) {
int rv;
if (stream_id == -1) {
if (session->server) {
return NGHTTP2_ERR_PROTO;
}
} else if (stream_id <= 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
flags &= NGHTTP2_FLAG_END_STREAM;
if (pri_spec && !nghttp2_priority_spec_check_default(pri_spec)) {
rv = detect_self_dependency(session, stream_id, pri_spec);
if (rv != 0) {
return rv;
}
flags |= NGHTTP2_FLAG_PRIORITY;
} else {
pri_spec = NULL;
}
return 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,
const uint8_t *opaque_data) {
flags &= NGHTTP2_FLAG_ACK;
return nghttp2_session_add_ping(session, flags, 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_outbound_item *item;
nghttp2_frame *frame;
nghttp2_priority_spec copy_pri_spec;
nghttp2_mem *mem;
(void)flags;
mem = &session->mem;
if (stream_id == 0 || 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;
nghttp2_priority_spec_normalize_weight(©_pri_spec);
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_outbound_item_init(item);
frame = &item->frame;
nghttp2_frame_priority_init(&frame->priority, stream_id, ©_pri_spec);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_priority_free(&frame->priority);
nghttp2_mem_free(mem, item);
return rv;
}
return 0;
}
int nghttp2_submit_rst_stream(nghttp2_session *session, uint8_t flags,
int32_t stream_id, uint32_t error_code) {
(void)flags;
if (stream_id == 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
return nghttp2_session_add_rst_stream(session, stream_id, error_code);
}
int nghttp2_submit_goaway(nghttp2_session *session, uint8_t flags,
int32_t last_stream_id, uint32_t error_code,
const uint8_t *opaque_data, size_t opaque_data_len) {
(void)flags;
if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) {
return 0;
}
return nghttp2_session_add_goaway(session, last_stream_id, error_code,
opaque_data, opaque_data_len,
NGHTTP2_GOAWAY_AUX_NONE);
}
int nghttp2_submit_shutdown_notice(nghttp2_session *session) {
if (!session->server) {
return NGHTTP2_ERR_INVALID_STATE;
}
if (session->goaway_flags) {
return 0;
}
return nghttp2_session_add_goaway(session, (1u << 31) - 1, NGHTTP2_NO_ERROR,
NULL, 0,
NGHTTP2_GOAWAY_AUX_SHUTDOWN_NOTICE);
}
int nghttp2_submit_settings(nghttp2_session *session, uint8_t flags,
const nghttp2_settings_entry *iv, size_t niv) {
(void)flags;
return nghttp2_session_add_settings(session, NGHTTP2_FLAG_NONE, iv, niv);
}
int32_t 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_outbound_item *item;
nghttp2_frame *frame;
nghttp2_nv *nva_copy;
uint8_t flags_copy;
int32_t promised_stream_id;
int rv;
nghttp2_mem *mem;
(void)flags;
mem = &session->mem;
if (stream_id <= 0 || nghttp2_session_is_my_stream_id(session, stream_id)) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if (!session->server) {
return NGHTTP2_ERR_PROTO;
}
/* All 32bit signed stream IDs are spent. */
if (session->next_stream_id > INT32_MAX) {
return NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
}
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_outbound_item_init(item);
item->aux_data.headers.stream_user_data = promised_stream_user_data;
frame = &item->frame;
rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen, mem);
if (rv < 0) {
nghttp2_mem_free(mem, item);
return rv;
}
flags_copy = NGHTTP2_FLAG_END_HEADERS;
promised_stream_id = (int32_t)session->next_stream_id;
session->next_stream_id += 2;
nghttp2_frame_push_promise_init(&frame->push_promise, flags_copy, stream_id,
promised_stream_id, nva_copy, nvlen);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_push_promise_free(&frame->push_promise, mem);
nghttp2_mem_free(mem, item);
return rv;
}
return promised_stream_id;
}
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 = 0;
(void)flags;
if (window_size_increment == 0) {
return 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) {
return 0;
}
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;
}
}
if (window_size_increment > 0) {
if (stream_id == 0) {
session->consumed_size =
nghttp2_max(0, session->consumed_size - window_size_increment);
} else {
stream->consumed_size =
nghttp2_max(0, stream->consumed_size - window_size_increment);
}
return nghttp2_session_add_window_update(session, 0, stream_id,
window_size_increment);
}
return 0;
}
int nghttp2_session_set_local_window_size(nghttp2_session *session,
uint8_t flags, int32_t stream_id,
int32_t window_size) {
int32_t window_size_increment;
nghttp2_stream *stream;
int rv;
(void)flags;
if (window_size < 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if (stream_id == 0) {
window_size_increment = window_size - session->local_window_size;
if (window_size_increment == 0) {
return 0;
}
if (window_size_increment < 0) {
return nghttp2_adjust_local_window_size(
&session->local_window_size, &session->recv_window_size,
&session->recv_reduction, &window_size_increment);
}
rv = nghttp2_increase_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 == NULL) {
return 0;
}
window_size_increment = window_size - stream->local_window_size;
if (window_size_increment == 0) {
return 0;
}
if (window_size_increment < 0) {
return nghttp2_adjust_local_window_size(
&stream->local_window_size, &stream->recv_window_size,
&stream->recv_reduction, &window_size_increment);
}
rv = nghttp2_increase_local_window_size(
&stream->local_window_size, &stream->recv_window_size,
&stream->recv_reduction, &window_size_increment);
if (rv != 0) {
return rv;
}
}
if (window_size_increment > 0) {
return nghttp2_session_add_window_update(session, 0, stream_id,
window_size_increment);
}
return 0;
}
int nghttp2_submit_altsvc(nghttp2_session *session, uint8_t flags,
int32_t stream_id, const uint8_t *origin,
size_t origin_len, const uint8_t *field_value,
size_t field_value_len) {
nghttp2_mem *mem;
uint8_t *buf, *p;
uint8_t *origin_copy;
uint8_t *field_value_copy;
nghttp2_outbound_item *item;
nghttp2_frame *frame;
nghttp2_ext_altsvc *altsvc;
int rv;
(void)flags;
mem = &session->mem;
if (!session->server) {
return NGHTTP2_ERR_INVALID_STATE;
}
if (2 + origin_len + field_value_len > NGHTTP2_MAX_PAYLOADLEN) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if (stream_id == 0) {
if (origin_len == 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
} else if (origin_len != 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
buf = nghttp2_mem_malloc(mem, origin_len + field_value_len + 2);
if (buf == NULL) {
return NGHTTP2_ERR_NOMEM;
}
p = buf;
origin_copy = p;
if (origin_len) {
p = nghttp2_cpymem(p, origin, origin_len);
}
*p++ = '\0';
field_value_copy = p;
if (field_value_len) {
p = nghttp2_cpymem(p, field_value, field_value_len);
}
*p++ = '\0';
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
rv = NGHTTP2_ERR_NOMEM;
goto fail_item_malloc;
}
nghttp2_outbound_item_init(item);
item->aux_data.ext.builtin = 1;
altsvc = &item->ext_frame_payload.altsvc;
frame = &item->frame;
frame->ext.payload = altsvc;
nghttp2_frame_altsvc_init(&frame->ext, stream_id, origin_copy, origin_len,
field_value_copy, field_value_len);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_altsvc_free(&frame->ext, mem);
nghttp2_mem_free(mem, item);
return rv;
}
return 0;
fail_item_malloc:
free(buf);
return rv;
}
int nghttp2_submit_origin(nghttp2_session *session, uint8_t flags,
const nghttp2_origin_entry *ov, size_t nov) {
nghttp2_mem *mem;
uint8_t *p;
nghttp2_outbound_item *item;
nghttp2_frame *frame;
nghttp2_ext_origin *origin;
nghttp2_origin_entry *ov_copy;
size_t len = 0;
size_t i;
int rv;
(void)flags;
mem = &session->mem;
if (!session->server) {
return NGHTTP2_ERR_INVALID_STATE;
}
if (nov) {
for (i = 0; i < nov; ++i) {
len += ov[i].origin_len;
}
if (2 * nov + len > NGHTTP2_MAX_PAYLOADLEN) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
/* The last nov is added for terminal NULL character. */
ov_copy =
nghttp2_mem_malloc(mem, nov * sizeof(nghttp2_origin_entry) + len + nov);
if (ov_copy == NULL) {
return NGHTTP2_ERR_NOMEM;
}
p = (uint8_t *)ov_copy + nov * sizeof(nghttp2_origin_entry);
for (i = 0; i < nov; ++i) {
ov_copy[i].origin = p;
ov_copy[i].origin_len = ov[i].origin_len;
p = nghttp2_cpymem(p, ov[i].origin, ov[i].origin_len);
*p++ = '\0';
}
assert((size_t)(p - (uint8_t *)ov_copy) ==
nov * sizeof(nghttp2_origin_entry) + len + nov);
} else {
ov_copy = NULL;
}
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
rv = NGHTTP2_ERR_NOMEM;
goto fail_item_malloc;
}
nghttp2_outbound_item_init(item);
item->aux_data.ext.builtin = 1;
origin = &item->ext_frame_payload.origin;
frame = &item->frame;
frame->ext.payload = origin;
nghttp2_frame_origin_init(&frame->ext, ov_copy, nov);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_origin_free(&frame->ext, mem);
nghttp2_mem_free(mem, item);
return rv;
}
return 0;
fail_item_malloc:
free(ov_copy);
return rv;
}
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;
}
int32_t 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;
int rv;
if (session->server) {
return NGHTTP2_ERR_PROTO;
}
if (pri_spec && !nghttp2_priority_spec_check_default(pri_spec)) {
rv = detect_self_dependency(session, -1, pri_spec);
if (rv != 0) {
return rv;
}
} else {
pri_spec = NULL;
}
flags = set_request_flags(pri_spec, data_prd);
return 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;
if (stream_id <= 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if (!session->server) {
return NGHTTP2_ERR_PROTO;
}
flags = set_response_flags(data_prd);
return 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_outbound_item *item;
nghttp2_frame *frame;
nghttp2_data_aux_data *aux_data;
uint8_t nflags = flags & NGHTTP2_FLAG_END_STREAM;
nghttp2_mem *mem;
mem = &session->mem;
if (stream_id == 0) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_outbound_item_init(item);
frame = &item->frame;
aux_data = &item->aux_data.data;
aux_data->data_prd = *data_prd;
aux_data->eof = 0;
aux_data->flags = nflags;
/* flags are sent on transmission */
nghttp2_frame_data_init(&frame->data, NGHTTP2_FLAG_NONE, stream_id);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_data_free(&frame->data);
nghttp2_mem_free(mem, item);
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 (ssize_t)nghttp2_frame_pack_settings_payload(buf, iv, niv);
}
int nghttp2_submit_extension(nghttp2_session *session, uint8_t type,
uint8_t flags, int32_t stream_id, void *payload) {
int rv;
nghttp2_outbound_item *item;
nghttp2_frame *frame;
nghttp2_mem *mem;
mem = &session->mem;
if (type <= NGHTTP2_CONTINUATION) {
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
if (!session->callbacks.pack_extension_callback) {
return NGHTTP2_ERR_INVALID_STATE;
}
item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
if (item == NULL) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_outbound_item_init(item);
frame = &item->frame;
nghttp2_frame_extension_init(&frame->ext, type, flags, stream_id, payload);
rv = nghttp2_session_add_item(session, item);
if (rv != 0) {
nghttp2_frame_extension_free(&frame->ext);
nghttp2_mem_free(mem, item);
return rv;
}
return 0;
}