nghttp2/src/h2load_http3_session.cc

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2019 nghttp2 contributors
*
* 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 "h2load_http3_session.h"
#include <iostream>
#include <ngtcp2/ngtcp2.h>
#include "h2load.h"
namespace h2load {
Http3Session::Http3Session(Client *client)
: client_(client), conn_(nullptr), npending_request_(0), reqidx_(0) {}
Http3Session::~Http3Session() { nghttp3_conn_del(conn_); }
void Http3Session::on_connect() {}
int Http3Session::submit_request() {
if (npending_request_) {
++npending_request_;
return 0;
}
auto config = client_->worker->config;
reqidx_ = client_->reqidx;
if (++client_->reqidx == config->nva.size()) {
client_->reqidx = 0;
}
auto stream_id = submit_request_internal();
if (stream_id < 0) {
if (stream_id == NGTCP2_ERR_STREAM_ID_BLOCKED) {
++npending_request_;
return 0;
}
return -1;
}
return 0;
}
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namespace {
nghttp3_ssize read_data(nghttp3_conn *conn, int64_t stream_id, nghttp3_vec *vec,
size_t veccnt, uint32_t *pflags, void *user_data,
void *stream_user_data) {
auto s = static_cast<Http3Session *>(user_data);
s->read_data(vec, veccnt, pflags);
return 1;
}
} // namespace
void Http3Session::read_data(nghttp3_vec *vec, size_t veccnt,
uint32_t *pflags) {
assert(veccnt > 0);
auto config = client_->worker->config;
vec[0].base = config->data;
vec[0].len = config->data_length;
*pflags |= NGHTTP3_DATA_FLAG_EOF;
}
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int64_t Http3Session::submit_request_internal() {
int rv;
int64_t stream_id;
auto config = client_->worker->config;
auto &nva = config->nva[reqidx_];
rv = ngtcp2_conn_open_bidi_stream(client_->quic.conn, &stream_id, nullptr);
if (rv != 0) {
return rv;
}
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nghttp3_data_reader dr{};
dr.read_data = h2load::read_data;
rv = nghttp3_conn_submit_request(
conn_, stream_id, reinterpret_cast<nghttp3_nv *>(nva.data()), nva.size(),
config->data_fd == -1 ? nullptr : &dr, nullptr);
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if (rv != 0) {
return rv;
}
client_->on_request(stream_id);
auto req_stat = client_->get_req_stat(stream_id);
assert(req_stat);
client_->record_request_time(req_stat);
return stream_id;
}
int Http3Session::on_read(const uint8_t *data, size_t len) { return -1; }
int Http3Session::on_write() { return -1; }
void Http3Session::terminate() {}
size_t Http3Session::max_concurrent_streams() {
return (size_t)client_->worker->config->max_concurrent_streams;
}
namespace {
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int stream_close(nghttp3_conn *conn, int64_t stream_id, uint64_t app_error_code,
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void *user_data, void *stream_user_data) {
auto s = static_cast<Http3Session *>(user_data);
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if (s->stream_close(stream_id, app_error_code) != 0) {
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return NGHTTP3_ERR_CALLBACK_FAILURE;
}
return 0;
}
} // namespace
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int Http3Session::stream_close(int64_t stream_id, uint64_t app_error_code) {
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if (!ngtcp2_is_bidi_stream(stream_id)) {
assert(!ngtcp2_conn_is_local_stream(client_->quic.conn, stream_id));
ngtcp2_conn_extend_max_streams_uni(client_->quic.conn, 1);
}
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client_->on_stream_close(stream_id, app_error_code == NGHTTP3_H3_NO_ERROR);
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return 0;
}
namespace {
int recv_data(nghttp3_conn *conn, int64_t stream_id, const uint8_t *data,
size_t datalen, void *user_data, void *stream_user_data) {
auto s = static_cast<Http3Session *>(user_data);
s->recv_data(stream_id, data, datalen);
return 0;
}
} // namespace
void Http3Session::recv_data(int64_t stream_id, const uint8_t *data,
size_t datalen) {
client_->record_ttfb();
client_->worker->stats.bytes_body += datalen;
consume(stream_id, datalen);
}
namespace {
int deferred_consume(nghttp3_conn *conn, int64_t stream_id, size_t nconsumed,
void *user_data, void *stream_user_data) {
auto s = static_cast<Http3Session *>(user_data);
s->consume(stream_id, nconsumed);
return 0;
}
} // namespace
void Http3Session::consume(int64_t stream_id, size_t nconsumed) {
ngtcp2_conn_extend_max_stream_offset(client_->quic.conn, stream_id,
nconsumed);
ngtcp2_conn_extend_max_offset(client_->quic.conn, nconsumed);
}
namespace {
int begin_headers(nghttp3_conn *conn, int64_t stream_id, void *user_data,
void *stream_user_data) {
auto s = static_cast<Http3Session *>(user_data);
s->begin_headers(stream_id);
return 0;
}
} // namespace
void Http3Session::begin_headers(int64_t stream_id) {
auto payloadlen = nghttp3_conn_get_frame_payload_left(conn_, stream_id);
assert(payloadlen > 0);
client_->worker->stats.bytes_head += payloadlen;
}
namespace {
int recv_header(nghttp3_conn *conn, int64_t stream_id, int32_t token,
nghttp3_rcbuf *name, nghttp3_rcbuf *value, uint8_t flags,
void *user_data, void *stream_user_data) {
auto s = static_cast<Http3Session *>(user_data);
auto k = nghttp3_rcbuf_get_buf(name);
auto v = nghttp3_rcbuf_get_buf(value);
s->recv_header(stream_id, &k, &v);
return 0;
}
} // namespace
void Http3Session::recv_header(int64_t stream_id, const nghttp3_vec *name,
const nghttp3_vec *value) {
client_->on_header(stream_id, name->base, name->len, value->base, value->len);
client_->worker->stats.bytes_head_decomp += name->len + value->len;
}
namespace {
int stop_sending(nghttp3_conn *conn, int64_t stream_id, uint64_t app_error_code,
void *user_data, void *stream_user_data) {
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auto s = static_cast<Http3Session *>(user_data);
if (s->stop_sending(stream_id, app_error_code) != 0) {
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return NGHTTP3_ERR_CALLBACK_FAILURE;
}
return 0;
}
} // namespace
int Http3Session::stop_sending(int64_t stream_id, uint64_t app_error_code) {
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auto rv = ngtcp2_conn_shutdown_stream_read(client_->quic.conn, stream_id,
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app_error_code);
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if (rv != 0) {
std::cerr << "ngtcp2_conn_shutdown_stream_read: " << ngtcp2_strerror(rv)
<< std::endl;
return -1;
}
return 0;
}
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int Http3Session::close_stream(int64_t stream_id, uint64_t app_error_code) {
auto rv = nghttp3_conn_close_stream(conn_, stream_id, app_error_code);
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switch (rv) {
case 0:
return 0;
case NGHTTP3_ERR_STREAM_NOT_FOUND:
if (!ngtcp2_is_bidi_stream(stream_id)) {
assert(!ngtcp2_conn_is_local_stream(client_->quic.conn, stream_id));
ngtcp2_conn_extend_max_streams_uni(client_->quic.conn, 1);
}
return 0;
default:
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return -1;
}
}
int Http3Session::shutdown_stream_read(int64_t stream_id) {
auto rv = nghttp3_conn_shutdown_stream_read(conn_, stream_id);
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if (rv != 0) {
return -1;
}
return 0;
}
int Http3Session::extend_max_local_streams() {
auto config = client_->worker->config;
for (; npending_request_; --npending_request_) {
auto stream_id = submit_request_internal();
if (stream_id < 0) {
if (stream_id == NGTCP2_ERR_STREAM_ID_BLOCKED) {
return 0;
}
return -1;
}
if (++reqidx_ == config->nva.size()) {
reqidx_ = 0;
}
}
return 0;
}
int Http3Session::init_conn() {
int rv;
assert(conn_ == nullptr);
if (ngtcp2_conn_get_max_local_streams_uni(client_->quic.conn) < 3) {
return -1;
}
nghttp3_callbacks callbacks{
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nullptr, // acked_stream_data
h2load::stream_close,
h2load::recv_data,
h2load::deferred_consume,
h2load::begin_headers,
h2load::recv_header,
nullptr, // end_headers
nullptr, // begin_trailers
h2load::recv_header,
nullptr, // end_trailers
h2load::stop_sending,
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};
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auto config = client_->worker->config;
nghttp3_settings settings;
nghttp3_settings_default(&settings);
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settings.qpack_max_dtable_capacity = config->header_table_size;
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settings.qpack_blocked_streams = 100;
auto mem = nghttp3_mem_default();
rv = nghttp3_conn_client_new(&conn_, &callbacks, &settings, mem, this);
if (rv != 0) {
std::cerr << "nghttp3_conn_client_new: " << nghttp3_strerror(rv)
<< std::endl;
return -1;
}
int64_t ctrl_stream_id;
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rv =
ngtcp2_conn_open_uni_stream(client_->quic.conn, &ctrl_stream_id, nullptr);
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if (rv != 0) {
std::cerr << "ngtcp2_conn_open_uni_stream: " << ngtcp2_strerror(rv)
<< std::endl;
return -1;
}
rv = nghttp3_conn_bind_control_stream(conn_, ctrl_stream_id);
if (rv != 0) {
std::cerr << "nghttp3_conn_bind_control_stream: " << nghttp3_strerror(rv)
<< std::endl;
return -1;
}
int64_t qpack_enc_stream_id, qpack_dec_stream_id;
rv = ngtcp2_conn_open_uni_stream(client_->quic.conn, &qpack_enc_stream_id,
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nullptr);
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if (rv != 0) {
std::cerr << "ngtcp2_conn_open_uni_stream: " << ngtcp2_strerror(rv)
<< std::endl;
return -1;
}
rv = ngtcp2_conn_open_uni_stream(client_->quic.conn, &qpack_dec_stream_id,
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nullptr);
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if (rv != 0) {
std::cerr << "ngtcp2_conn_open_uni_stream: " << ngtcp2_strerror(rv)
<< std::endl;
return -1;
}
rv = nghttp3_conn_bind_qpack_streams(conn_, qpack_enc_stream_id,
qpack_dec_stream_id);
if (rv != 0) {
std::cerr << "nghttp3_conn_bind_qpack_streams: " << nghttp3_strerror(rv)
<< std::endl;
return -1;
}
return 0;
}
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ssize_t Http3Session::read_stream(uint32_t flags, int64_t stream_id,
const uint8_t *data, size_t datalen) {
auto nconsumed = nghttp3_conn_read_stream(
conn_, stream_id, data, datalen, flags & NGTCP2_STREAM_DATA_FLAG_FIN);
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if (nconsumed < 0) {
std::cerr << "nghttp3_conn_read_stream: " << nghttp3_strerror(nconsumed)
<< std::endl;
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ngtcp2_connection_close_error_set_application_error(
&client_->quic.last_error,
nghttp3_err_infer_quic_app_error_code(nconsumed), nullptr, 0);
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return -1;
}
return nconsumed;
}
ssize_t Http3Session::write_stream(int64_t &stream_id, int &fin,
nghttp3_vec *vec, size_t veccnt) {
auto sveccnt =
nghttp3_conn_writev_stream(conn_, &stream_id, &fin, vec, veccnt);
if (sveccnt < 0) {
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ngtcp2_connection_close_error_set_application_error(
&client_->quic.last_error,
nghttp3_err_infer_quic_app_error_code(sveccnt), nullptr, 0);
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return -1;
}
return sveccnt;
}
void Http3Session::block_stream(int64_t stream_id) {
nghttp3_conn_block_stream(conn_, stream_id);
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}
void Http3Session::shutdown_stream_write(int64_t stream_id) {
nghttp3_conn_shutdown_stream_write(conn_, stream_id);
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}
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int Http3Session::add_write_offset(int64_t stream_id, size_t ndatalen) {
auto rv = nghttp3_conn_add_write_offset(conn_, stream_id, ndatalen);
if (rv != 0) {
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ngtcp2_connection_close_error_set_application_error(
&client_->quic.last_error, nghttp3_err_infer_quic_app_error_code(rv),
nullptr, 0);
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return -1;
}
return 0;
}
int Http3Session::add_ack_offset(int64_t stream_id, size_t datalen) {
auto rv = nghttp3_conn_add_ack_offset(conn_, stream_id, datalen);
if (rv != 0) {
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ngtcp2_connection_close_error_set_application_error(
&client_->quic.last_error, nghttp3_err_infer_quic_app_error_code(rv),
nullptr, 0);
return -1;
}
return 0;
}
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} // namespace h2load