238 lines
7.3 KiB
C++
238 lines
7.3 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2014 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 "h2load_spdy_session.h"
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#include <cassert>
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#include "h2load.h"
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#include "util.h"
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using namespace nghttp2;
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namespace h2load {
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SpdySession::SpdySession(Client *client, uint16_t spdy_version)
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: client_(client), session_(nullptr), spdy_version_(spdy_version) {}
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SpdySession::~SpdySession() { spdylay_session_del(session_); }
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namespace {
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void before_ctrl_send_callback(spdylay_session *session,
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spdylay_frame_type type, spdylay_frame *frame,
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void *user_data) {
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auto client = static_cast<Client *>(user_data);
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if (type != SPDYLAY_SYN_STREAM) {
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return;
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}
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client->on_request(frame->syn_stream.stream_id);
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auto req_stat =
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static_cast<RequestStat *>(spdylay_session_get_stream_user_data(
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session, frame->syn_stream.stream_id));
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client->record_request_time(req_stat);
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}
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} // namespace
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namespace {
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void on_ctrl_recv_callback(spdylay_session *session, spdylay_frame_type type,
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spdylay_frame *frame, void *user_data) {
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auto client = static_cast<Client *>(user_data);
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if (type != SPDYLAY_SYN_REPLY) {
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return;
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}
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for (auto p = frame->syn_reply.nv; *p; p += 2) {
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auto name = *p;
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auto value = *(p + 1);
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client->on_header(frame->syn_reply.stream_id,
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reinterpret_cast<const uint8_t *>(name), strlen(name),
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reinterpret_cast<const uint8_t *>(value), strlen(value));
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}
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client->worker->stats.bytes_head += frame->syn_reply.hd.length;
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}
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} // namespace
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namespace {
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void on_data_chunk_recv_callback(spdylay_session *session, uint8_t flags,
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int32_t stream_id, const uint8_t *data,
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size_t len, void *user_data) {
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auto client = static_cast<Client *>(user_data);
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client->worker->stats.bytes_body += len;
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auto spdy_session = static_cast<SpdySession *>(client->session.get());
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spdy_session->handle_window_update(stream_id, len);
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}
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} // namespace
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namespace {
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void on_stream_close_callback(spdylay_session *session, int32_t stream_id,
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spdylay_status_code status_code,
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void *user_data) {
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auto client = static_cast<Client *>(user_data);
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auto req_stat = static_cast<RequestStat *>(
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spdylay_session_get_stream_user_data(session, stream_id));
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client->on_stream_close(stream_id, status_code == SPDYLAY_OK, req_stat);
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}
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} // namespace
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namespace {
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ssize_t send_callback(spdylay_session *session, const uint8_t *data,
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size_t length, int flags, void *user_data) {
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auto client = static_cast<Client *>(user_data);
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auto &wb = client->wb;
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if (wb.wleft() == 0) {
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return SPDYLAY_ERR_DEFERRED;
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}
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return wb.write(data, length);
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}
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} // namespace
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void SpdySession::on_connect() {
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spdylay_session_callbacks callbacks = {0};
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callbacks.send_callback = send_callback;
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callbacks.before_ctrl_send_callback = before_ctrl_send_callback;
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callbacks.on_data_chunk_recv_callback = on_data_chunk_recv_callback;
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callbacks.on_stream_close_callback = on_stream_close_callback;
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callbacks.on_ctrl_recv_callback = on_ctrl_recv_callback;
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spdylay_session_client_new(&session_, spdy_version_, &callbacks, client_);
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int val = 1;
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spdylay_session_set_option(session_, SPDYLAY_OPT_NO_AUTO_WINDOW_UPDATE, &val,
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sizeof(val));
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spdylay_settings_entry iv;
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iv.settings_id = SPDYLAY_SETTINGS_INITIAL_WINDOW_SIZE;
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iv.flags = SPDYLAY_ID_FLAG_SETTINGS_NONE;
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iv.value = (1 << client_->worker->config->window_bits);
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spdylay_submit_settings(session_, SPDYLAY_FLAG_SETTINGS_NONE, &iv, 1);
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auto config = client_->worker->config;
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if (spdy_version_ >= SPDYLAY_PROTO_SPDY3_1 &&
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config->connection_window_bits > 16) {
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auto delta =
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(1 << config->connection_window_bits) - SPDYLAY_INITIAL_WINDOW_SIZE;
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spdylay_submit_window_update(session_, 0, delta);
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}
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client_->signal_write();
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}
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void SpdySession::submit_request(RequestStat *req_stat) {
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auto config = client_->worker->config;
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auto &nv = config->nv[client_->reqidx++];
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if (client_->reqidx == config->nv.size()) {
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client_->reqidx = 0;
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}
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spdylay_submit_request(session_, 0, nv.data(), nullptr, req_stat);
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}
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int SpdySession::on_read(const uint8_t *data, size_t len) {
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auto rv = spdylay_session_mem_recv(session_, data, len);
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if (rv < 0) {
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return -1;
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}
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assert(static_cast<size_t>(rv) == len);
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if (spdylay_session_want_read(session_) == 0 &&
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spdylay_session_want_write(session_) == 0 && client_->wb.rleft() == 0) {
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return -1;
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}
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client_->signal_write();
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return 0;
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}
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int SpdySession::on_write() {
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auto rv = spdylay_session_send(session_);
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if (rv != 0) {
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return -1;
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}
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if (spdylay_session_want_read(session_) == 0 &&
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spdylay_session_want_write(session_) == 0 && client_->wb.rleft() == 0) {
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return -1;
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}
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return 0;
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}
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void SpdySession::terminate() {
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spdylay_session_fail_session(session_, SPDYLAY_OK);
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}
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namespace {
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int32_t determine_window_update_transmission(spdylay_session *session,
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int32_t stream_id,
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size_t window_bits) {
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int32_t recv_length;
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if (stream_id == 0) {
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recv_length = spdylay_session_get_recv_data_length(session);
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} else {
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recv_length =
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spdylay_session_get_stream_recv_data_length(session, stream_id);
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}
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auto window_size = 1 << window_bits;
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if (recv_length != -1 && recv_length >= window_size / 2) {
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return recv_length;
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}
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return -1;
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}
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} // namespace
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void SpdySession::handle_window_update(int32_t stream_id, size_t recvlen) {
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auto config = client_->worker->config;
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size_t connection_window_bits;
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if (config->connection_window_bits > 16) {
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connection_window_bits = config->connection_window_bits;
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} else {
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connection_window_bits = 16;
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}
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auto delta =
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determine_window_update_transmission(session_, 0, connection_window_bits);
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if (delta > 0) {
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spdylay_submit_window_update(session_, 0, delta);
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}
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delta = determine_window_update_transmission(session_, stream_id,
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config->window_bits);
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if (delta > 0) {
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spdylay_submit_window_update(session_, stream_id, delta);
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}
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}
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} // namespace h2load
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