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+++ b/examples/client.cc
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+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2017 ngtcp2 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 <cstdlib>
+#include <cassert>
+#include <cerrno>
+#include <iostream>
+#include <algorithm>
+#include <memory>
+#include <fstream>
+#include <iomanip>
+
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <sys/mman.h>
+
+#include <http-parser/http_parser.h>
+
+#include "client.h"
+#include "network.h"
+#include "debug.h"
+#include "util.h"
+#include "shared.h"
+
+using namespace ngtcp2;
+using namespace std::literals;
+
+namespace {
+auto randgen = util::make_mt19937();
+} // namespace
+
+namespace {
+constexpr size_t max_preferred_versionslen = 4;
+} // namespace
+
+Config config{};
+
+Stream::Stream(const Request &req, int64_t stream_id)
+ : req(req), stream_id(stream_id), fd(-1) {}
+
+Stream::~Stream() {
+ if (fd != -1) {
+ close(fd);
+ }
+}
+
+int Stream::open_file(const std::string_view &path) {
+ assert(fd == -1);
+
+ std::string_view filename;
+
+ auto it = std::find(std::rbegin(path), std::rend(path), '/').base();
+ if (it == std::end(path)) {
+ filename = "index.html"sv;
+ } else {
+ filename = std::string_view{it, static_cast<size_t>(std::end(path) - it)};
+ if (filename == ".."sv || filename == "."sv) {
+ std::cerr << "Invalid file name: " << filename << std::endl;
+ return -1;
+ }
+ }
+
+ auto fname = std::string{config.download};
+ fname += '/';
+ fname += filename;
+
+ fd = open(fname.c_str(), O_WRONLY | O_CREAT | O_TRUNC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+ if (fd == -1) {
+ std::cerr << "open: Could not open file " << fname << ": "
+ << strerror(errno) << std::endl;
+ return -1;
+ }
+
+ return 0;
+}
+
+namespace {
+void writecb(struct ev_loop *loop, ev_io *w, int revents) {
+ auto c = static_cast<Client *>(w->data);
+
+ c->on_write();
+}
+} // namespace
+
+namespace {
+void readcb(struct ev_loop *loop, ev_io *w, int revents) {
+ auto ep = static_cast<Endpoint *>(w->data);
+ auto c = ep->client;
+
+ if (c->on_read(*ep) != 0) {
+ return;
+ }
+
+ c->on_write();
+}
+} // namespace
+
+namespace {
+void timeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
+ int rv;
+ auto c = static_cast<Client *>(w->data);
+
+ rv = c->handle_expiry();
+ if (rv != 0) {
+ return;
+ }
+
+ c->on_write();
+}
+} // namespace
+
+namespace {
+void change_local_addrcb(struct ev_loop *loop, ev_timer *w, int revents) {
+ auto c = static_cast<Client *>(w->data);
+
+ c->change_local_addr();
+}
+} // namespace
+
+namespace {
+void key_updatecb(struct ev_loop *loop, ev_timer *w, int revents) {
+ auto c = static_cast<Client *>(w->data);
+
+ if (c->initiate_key_update() != 0) {
+ c->disconnect();
+ }
+}
+} // namespace
+
+namespace {
+void delay_streamcb(struct ev_loop *loop, ev_timer *w, int revents) {
+ auto c = static_cast<Client *>(w->data);
+
+ ev_timer_stop(loop, w);
+ c->on_extend_max_streams();
+ c->on_write();
+}
+} // namespace
+
+namespace {
+void siginthandler(struct ev_loop *loop, ev_signal *w, int revents) {
+ ev_break(loop, EVBREAK_ALL);
+}
+} // namespace
+
+Client::Client(struct ev_loop *loop, uint32_t client_chosen_version,
+ uint32_t original_version)
+ : remote_addr_{},
+ loop_(loop),
+ httpconn_(nullptr),
+ addr_(nullptr),
+ port_(nullptr),
+ nstreams_done_(0),
+ nstreams_closed_(0),
+ nkey_update_(0),
+ client_chosen_version_(client_chosen_version),
+ original_version_(original_version),
+ early_data_(false),
+ should_exit_(false),
+ should_exit_on_handshake_confirmed_(false),
+ handshake_confirmed_(false),
+ tx_{} {
+ ev_io_init(&wev_, writecb, 0, EV_WRITE);
+ wev_.data = this;
+ ev_timer_init(&timer_, timeoutcb, 0., 0.);
+ timer_.data = this;
+ ev_timer_init(&change_local_addr_timer_, change_local_addrcb,
+ static_cast<double>(config.change_local_addr) / NGTCP2_SECONDS,
+ 0.);
+ change_local_addr_timer_.data = this;
+ ev_timer_init(&key_update_timer_, key_updatecb,
+ static_cast<double>(config.key_update) / NGTCP2_SECONDS, 0.);
+ key_update_timer_.data = this;
+ ev_timer_init(&delay_stream_timer_, delay_streamcb,
+ static_cast<double>(config.delay_stream) / NGTCP2_SECONDS, 0.);
+ delay_stream_timer_.data = this;
+ ev_signal_init(&sigintev_, siginthandler, SIGINT);
+}
+
+Client::~Client() {
+ disconnect();
+
+ if (httpconn_) {
+ nghttp3_conn_del(httpconn_);
+ httpconn_ = nullptr;
+ }
+}
+
+void Client::disconnect() {
+ tx_.send_blocked = false;
+
+ handle_error();
+
+ config.tx_loss_prob = 0;
+
+ ev_timer_stop(loop_, &delay_stream_timer_);
+ ev_timer_stop(loop_, &key_update_timer_);
+ ev_timer_stop(loop_, &change_local_addr_timer_);
+ ev_timer_stop(loop_, &timer_);
+
+ ev_io_stop(loop_, &wev_);
+
+ for (auto &ep : endpoints_) {
+ ev_io_stop(loop_, &ep.rev);
+ close(ep.fd);
+ }
+
+ endpoints_.clear();
+
+ ev_signal_stop(loop_, &sigintev_);
+}
+
+namespace {
+int recv_crypto_data(ngtcp2_conn *conn, ngtcp2_crypto_level crypto_level,
+ uint64_t offset, const uint8_t *data, size_t datalen,
+ void *user_data) {
+ if (!config.quiet && !config.no_quic_dump) {
+ debug::print_crypto_data(crypto_level, data, datalen);
+ }
+
+ return ngtcp2_crypto_recv_crypto_data_cb(conn, crypto_level, offset, data,
+ datalen, user_data);
+}
+} // namespace
+
+namespace {
+int recv_stream_data(ngtcp2_conn *conn, uint32_t flags, int64_t stream_id,
+ uint64_t offset, const uint8_t *data, size_t datalen,
+ void *user_data, void *stream_user_data) {
+ if (!config.quiet && !config.no_quic_dump) {
+ debug::print_stream_data(stream_id, data, datalen);
+ }
+
+ auto c = static_cast<Client *>(user_data);
+
+ if (c->recv_stream_data(flags, stream_id, data, datalen) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int acked_stream_data_offset(ngtcp2_conn *conn, int64_t stream_id,
+ uint64_t offset, uint64_t datalen, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+ if (c->acked_stream_data_offset(stream_id, datalen) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int handshake_completed(ngtcp2_conn *conn, void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (!config.quiet) {
+ debug::handshake_completed(conn, user_data);
+ }
+
+ if (c->handshake_completed() != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+int Client::handshake_completed() {
+ if (early_data_ && !tls_session_.get_early_data_accepted()) {
+ if (!config.quiet) {
+ std::cerr << "Early data was rejected by server" << std::endl;
+ }
+
+ // Some TLS backends only report early data rejection after
+ // handshake completion (e.g., OpenSSL). For TLS backends which
+ // report it early (e.g., BoringSSL and PicoTLS), the following
+ // functions are noop.
+ if (auto rv = ngtcp2_conn_early_data_rejected(conn_); rv != 0) {
+ std::cerr << "ngtcp2_conn_early_data_rejected: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ if (setup_httpconn() != 0) {
+ return -1;
+ }
+ }
+
+ if (!config.quiet) {
+ std::cerr << "Negotiated cipher suite is " << tls_session_.get_cipher_name()
+ << std::endl;
+ std::cerr << "Negotiated ALPN is " << tls_session_.get_selected_alpn()
+ << std::endl;
+ }
+
+ if (config.tp_file) {
+ auto params = ngtcp2_conn_get_remote_transport_params(conn_);
+
+ if (write_transport_params(config.tp_file, params) != 0) {
+ std::cerr << "Could not write transport parameters in " << config.tp_file
+ << std::endl;
+ }
+ }
+
+ return 0;
+}
+
+namespace {
+int handshake_confirmed(ngtcp2_conn *conn, void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (!config.quiet) {
+ debug::handshake_confirmed(conn, user_data);
+ }
+
+ if (c->handshake_confirmed() != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+int Client::handshake_confirmed() {
+ handshake_confirmed_ = true;
+
+ if (config.change_local_addr) {
+ start_change_local_addr_timer();
+ }
+ if (config.key_update) {
+ start_key_update_timer();
+ }
+ if (config.delay_stream) {
+ start_delay_stream_timer();
+ }
+
+ if (should_exit_on_handshake_confirmed_) {
+ should_exit_ = true;
+ }
+
+ return 0;
+}
+
+namespace {
+int recv_version_negotiation(ngtcp2_conn *conn, const ngtcp2_pkt_hd *hd,
+ const uint32_t *sv, size_t nsv, void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ c->recv_version_negotiation(sv, nsv);
+
+ return 0;
+}
+} // namespace
+
+void Client::recv_version_negotiation(const uint32_t *sv, size_t nsv) {
+ offered_versions_.resize(nsv);
+ std::copy_n(sv, nsv, std::begin(offered_versions_));
+}
+
+namespace {
+int stream_close(ngtcp2_conn *conn, uint32_t flags, int64_t stream_id,
+ uint64_t app_error_code, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (!(flags & NGTCP2_STREAM_CLOSE_FLAG_APP_ERROR_CODE_SET)) {
+ app_error_code = NGHTTP3_H3_NO_ERROR;
+ }
+
+ if (c->on_stream_close(stream_id, app_error_code) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int stream_reset(ngtcp2_conn *conn, int64_t stream_id, uint64_t final_size,
+ uint64_t app_error_code, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (c->on_stream_reset(stream_id) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int stream_stop_sending(ngtcp2_conn *conn, int64_t stream_id,
+ uint64_t app_error_code, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (c->on_stream_stop_sending(stream_id) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int extend_max_streams_bidi(ngtcp2_conn *conn, uint64_t max_streams,
+ void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (c->on_extend_max_streams() != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+void rand(uint8_t *dest, size_t destlen, const ngtcp2_rand_ctx *rand_ctx) {
+ auto dis = std::uniform_int_distribution<uint8_t>(0, 255);
+ std::generate(dest, dest + destlen, [&dis]() { return dis(randgen); });
+}
+} // namespace
+
+namespace {
+int get_new_connection_id(ngtcp2_conn *conn, ngtcp2_cid *cid, uint8_t *token,
+ size_t cidlen, void *user_data) {
+ if (util::generate_secure_random(cid->data, cidlen) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ cid->datalen = cidlen;
+ if (ngtcp2_crypto_generate_stateless_reset_token(
+ token, config.static_secret.data(), config.static_secret.size(),
+ cid) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int do_hp_mask(uint8_t *dest, const ngtcp2_crypto_cipher *hp,
+ const ngtcp2_crypto_cipher_ctx *hp_ctx, const uint8_t *sample) {
+ if (ngtcp2_crypto_hp_mask(dest, hp, hp_ctx, sample) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ if (!config.quiet && config.show_secret) {
+ debug::print_hp_mask(dest, NGTCP2_HP_MASKLEN, sample, NGTCP2_HP_SAMPLELEN);
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int update_key(ngtcp2_conn *conn, uint8_t *rx_secret, uint8_t *tx_secret,
+ ngtcp2_crypto_aead_ctx *rx_aead_ctx, uint8_t *rx_iv,
+ ngtcp2_crypto_aead_ctx *tx_aead_ctx, uint8_t *tx_iv,
+ const uint8_t *current_rx_secret,
+ const uint8_t *current_tx_secret, size_t secretlen,
+ void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ if (c->update_key(rx_secret, tx_secret, rx_aead_ctx, rx_iv, tx_aead_ctx,
+ tx_iv, current_rx_secret, current_tx_secret,
+ secretlen) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int path_validation(ngtcp2_conn *conn, uint32_t flags, const ngtcp2_path *path,
+ ngtcp2_path_validation_result res, void *user_data) {
+ if (!config.quiet) {
+ debug::path_validation(path, res);
+ }
+
+ if (flags & NGTCP2_PATH_VALIDATION_FLAG_PREFERRED_ADDR) {
+ auto c = static_cast<Client *>(user_data);
+
+ c->set_remote_addr(path->remote);
+ }
+
+ return 0;
+}
+} // namespace
+
+void Client::set_remote_addr(const ngtcp2_addr &remote_addr) {
+ memcpy(&remote_addr_.su, remote_addr.addr, remote_addr.addrlen);
+ remote_addr_.len = remote_addr.addrlen;
+}
+
+namespace {
+int select_preferred_address(ngtcp2_conn *conn, ngtcp2_path *dest,
+ const ngtcp2_preferred_addr *paddr,
+ void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+ Address remote_addr;
+
+ if (config.no_preferred_addr) {
+ return 0;
+ }
+
+ if (c->select_preferred_address(remote_addr, paddr) != 0) {
+ return 0;
+ }
+
+ auto ep = c->endpoint_for(remote_addr);
+ if (!ep) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ ngtcp2_addr_copy_byte(&dest->local, &(*ep)->addr.su.sa, (*ep)->addr.len);
+ ngtcp2_addr_copy_byte(&dest->remote, &remote_addr.su.sa, remote_addr.len);
+ dest->user_data = *ep;
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int extend_max_stream_data(ngtcp2_conn *conn, int64_t stream_id,
+ uint64_t max_data, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+ if (c->extend_max_stream_data(stream_id, max_data) != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+ return 0;
+}
+} // namespace
+
+int Client::extend_max_stream_data(int64_t stream_id, uint64_t max_data) {
+ if (auto rv = nghttp3_conn_unblock_stream(httpconn_, stream_id); rv != 0) {
+ std::cerr << "nghttp3_conn_unblock_stream: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+ return 0;
+}
+
+namespace {
+int recv_new_token(ngtcp2_conn *conn, const ngtcp2_vec *token,
+ void *user_data) {
+ if (config.token_file.empty()) {
+ return 0;
+ }
+
+ util::write_token(config.token_file, token->base, token->len);
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int recv_rx_key(ngtcp2_conn *conn, ngtcp2_crypto_level level, void *user_data) {
+ if (level != NGTCP2_CRYPTO_LEVEL_APPLICATION) {
+ return 0;
+ }
+
+ auto c = static_cast<Client *>(user_data);
+ if ((!c->get_early_data() || ngtcp2_conn_get_early_data_rejected(conn)) &&
+ c->setup_httpconn() != 0) {
+ return NGTCP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int early_data_rejected(ngtcp2_conn *conn, void *user_data) {
+ auto c = static_cast<Client *>(user_data);
+
+ c->early_data_rejected();
+
+ return 0;
+}
+} // namespace
+
+void Client::early_data_rejected() {
+ nghttp3_conn_del(httpconn_);
+ httpconn_ = nullptr;
+
+ nstreams_done_ = 0;
+ streams_.clear();
+}
+
+int Client::init(int fd, const Address &local_addr, const Address &remote_addr,
+ const char *addr, const char *port,
+ TLSClientContext &tls_ctx) {
+ endpoints_.reserve(4);
+
+ endpoints_.emplace_back();
+ auto &ep = endpoints_.back();
+ ep.addr = local_addr;
+ ep.client = this;
+ ep.fd = fd;
+ ev_io_init(&ep.rev, readcb, fd, EV_READ);
+ ep.rev.data = &ep;
+
+ remote_addr_ = remote_addr;
+ addr_ = addr;
+ port_ = port;
+
+ auto callbacks = ngtcp2_callbacks{
+ ngtcp2_crypto_client_initial_cb,
+ nullptr, // recv_client_initial
+ ::recv_crypto_data,
+ ::handshake_completed,
+ ::recv_version_negotiation,
+ ngtcp2_crypto_encrypt_cb,
+ ngtcp2_crypto_decrypt_cb,
+ do_hp_mask,
+ ::recv_stream_data,
+ ::acked_stream_data_offset,
+ nullptr, // stream_open
+ stream_close,
+ nullptr, // recv_stateless_reset
+ ngtcp2_crypto_recv_retry_cb,
+ extend_max_streams_bidi,
+ nullptr, // extend_max_streams_uni
+ rand,
+ get_new_connection_id,
+ nullptr, // remove_connection_id
+ ::update_key,
+ path_validation,
+ ::select_preferred_address,
+ stream_reset,
+ nullptr, // extend_max_remote_streams_bidi,
+ nullptr, // extend_max_remote_streams_uni,
+ ::extend_max_stream_data,
+ nullptr, // dcid_status
+ ::handshake_confirmed,
+ ::recv_new_token,
+ ngtcp2_crypto_delete_crypto_aead_ctx_cb,
+ ngtcp2_crypto_delete_crypto_cipher_ctx_cb,
+ nullptr, // recv_datagram
+ nullptr, // ack_datagram
+ nullptr, // lost_datagram
+ ngtcp2_crypto_get_path_challenge_data_cb,
+ stream_stop_sending,
+ ngtcp2_crypto_version_negotiation_cb,
+ ::recv_rx_key,
+ nullptr, // recv_tx_key
+ ::early_data_rejected,
+ };
+
+ ngtcp2_cid scid, dcid;
+ if (config.scid_present) {
+ scid = config.scid;
+ } else {
+ scid.datalen = 17;
+ if (util::generate_secure_random(scid.data, scid.datalen) != 0) {
+ std::cerr << "Could not generate source connection ID" << std::endl;
+ return -1;
+ }
+ }
+ if (config.dcid.datalen == 0) {
+ dcid.datalen = 18;
+ if (util::generate_secure_random(dcid.data, dcid.datalen) != 0) {
+ std::cerr << "Could not generate destination connection ID" << std::endl;
+ return -1;
+ }
+ } else {
+ dcid = config.dcid;
+ }
+
+ ngtcp2_settings settings;
+ ngtcp2_settings_default(&settings);
+ settings.log_printf = config.quiet ? nullptr : debug::log_printf;
+ if (!config.qlog_file.empty() || !config.qlog_dir.empty()) {
+ std::string path;
+ if (!config.qlog_file.empty()) {
+ path = config.qlog_file;
+ } else {
+ path = std::string{config.qlog_dir};
+ path += '/';
+ path += util::format_hex(scid.data, scid.datalen);
+ path += ".sqlog";
+ }
+ qlog_ = fopen(path.c_str(), "w");
+ if (qlog_ == nullptr) {
+ std::cerr << "Could not open qlog file " << std::quoted(path) << ": "
+ << strerror(errno) << std::endl;
+ return -1;
+ }
+ settings.qlog.write = qlog_write_cb;
+ }
+
+ settings.cc_algo = config.cc_algo;
+ settings.initial_ts = util::timestamp(loop_);
+ settings.initial_rtt = config.initial_rtt;
+ settings.max_window = config.max_window;
+ settings.max_stream_window = config.max_stream_window;
+ if (config.max_udp_payload_size) {
+ settings.max_tx_udp_payload_size = config.max_udp_payload_size;
+ settings.no_tx_udp_payload_size_shaping = 1;
+ }
+ settings.handshake_timeout = config.handshake_timeout;
+ settings.no_pmtud = config.no_pmtud;
+ settings.ack_thresh = config.ack_thresh;
+
+ std::string token;
+
+ if (!config.token_file.empty()) {
+ std::cerr << "Reading token file " << config.token_file << std::endl;
+
+ auto t = util::read_token(config.token_file);
+ if (t) {
+ token = std::move(*t);
+ settings.token.base = reinterpret_cast<uint8_t *>(token.data());
+ settings.token.len = token.size();
+ }
+ }
+
+ if (!config.other_versions.empty()) {
+ settings.other_versions = config.other_versions.data();
+ settings.other_versionslen = config.other_versions.size();
+ }
+
+ if (!config.preferred_versions.empty()) {
+ settings.preferred_versions = config.preferred_versions.data();
+ settings.preferred_versionslen = config.preferred_versions.size();
+ }
+
+ settings.original_version = original_version_;
+
+ ngtcp2_transport_params params;
+ ngtcp2_transport_params_default(&params);
+ params.initial_max_stream_data_bidi_local = config.max_stream_data_bidi_local;
+ params.initial_max_stream_data_bidi_remote =
+ config.max_stream_data_bidi_remote;
+ params.initial_max_stream_data_uni = config.max_stream_data_uni;
+ params.initial_max_data = config.max_data;
+ params.initial_max_streams_bidi = config.max_streams_bidi;
+ params.initial_max_streams_uni = config.max_streams_uni;
+ params.max_idle_timeout = config.timeout;
+ params.active_connection_id_limit = 7;
+
+ auto path = ngtcp2_path{
+ {
+ const_cast<sockaddr *>(&ep.addr.su.sa),
+ ep.addr.len,
+ },
+ {
+ const_cast<sockaddr *>(&remote_addr.su.sa),
+ remote_addr.len,
+ },
+ &ep,
+ };
+ auto rv = ngtcp2_conn_client_new(&conn_, &dcid, &scid, &path,
+ client_chosen_version_, &callbacks,
+ &settings, &params, nullptr, this);
+
+ if (rv != 0) {
+ std::cerr << "ngtcp2_conn_client_new: " << ngtcp2_strerror(rv) << std::endl;
+ return -1;
+ }
+
+ if (tls_session_.init(early_data_, tls_ctx, addr_, this,
+ client_chosen_version_, AppProtocol::H3) != 0) {
+ return -1;
+ }
+
+ ngtcp2_conn_set_tls_native_handle(conn_, tls_session_.get_native_handle());
+
+ if (early_data_ && config.tp_file) {
+ ngtcp2_transport_params params;
+ if (read_transport_params(config.tp_file, &params) != 0) {
+ std::cerr << "Could not read transport parameters from " << config.tp_file
+ << std::endl;
+ early_data_ = false;
+ } else {
+ ngtcp2_conn_set_early_remote_transport_params(conn_, &params);
+ if (make_stream_early() != 0) {
+ return -1;
+ }
+ }
+ }
+
+ ev_io_start(loop_, &ep.rev);
+
+ ev_signal_start(loop_, &sigintev_);
+
+ return 0;
+}
+
+int Client::feed_data(const Endpoint &ep, const sockaddr *sa, socklen_t salen,
+ const ngtcp2_pkt_info *pi, uint8_t *data,
+ size_t datalen) {
+ auto path = ngtcp2_path{
+ {
+ const_cast<sockaddr *>(&ep.addr.su.sa),
+ ep.addr.len,
+ },
+ {
+ const_cast<sockaddr *>(sa),
+ salen,
+ },
+ const_cast<Endpoint *>(&ep),
+ };
+ if (auto rv = ngtcp2_conn_read_pkt(conn_, &path, pi, data, datalen,
+ util::timestamp(loop_));
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_read_pkt: " << ngtcp2_strerror(rv) << std::endl;
+ if (!last_error_.error_code) {
+ if (rv == NGTCP2_ERR_CRYPTO) {
+ ngtcp2_connection_close_error_set_transport_error_tls_alert(
+ &last_error_, ngtcp2_conn_get_tls_alert(conn_), nullptr, 0);
+ } else {
+ ngtcp2_connection_close_error_set_transport_error_liberr(
+ &last_error_, rv, nullptr, 0);
+ }
+ }
+ disconnect();
+ return -1;
+ }
+ return 0;
+}
+
+int Client::on_read(const Endpoint &ep) {
+ std::array<uint8_t, 64_k> buf;
+ sockaddr_union su;
+ size_t pktcnt = 0;
+ ngtcp2_pkt_info pi;
+
+ iovec msg_iov;
+ msg_iov.iov_base = buf.data();
+ msg_iov.iov_len = buf.size();
+
+ msghdr msg{};
+ msg.msg_name = &su;
+ msg.msg_iov = &msg_iov;
+ msg.msg_iovlen = 1;
+
+ uint8_t msg_ctrl[CMSG_SPACE(sizeof(uint8_t))];
+ msg.msg_control = msg_ctrl;
+
+ for (;;) {
+ msg.msg_namelen = sizeof(su);
+ msg.msg_controllen = sizeof(msg_ctrl);
+
+ auto nread = recvmsg(ep.fd, &msg, 0);
+
+ if (nread == -1) {
+ if (errno != EAGAIN && errno != EWOULDBLOCK) {
+ std::cerr << "recvmsg: " << strerror(errno) << std::endl;
+ }
+ break;
+ }
+
+ pi.ecn = msghdr_get_ecn(&msg, su.storage.ss_family);
+
+ if (!config.quiet) {
+ std::cerr << "Received packet: local="
+ << util::straddr(&ep.addr.su.sa, ep.addr.len)
+ << " remote=" << util::straddr(&su.sa, msg.msg_namelen)
+ << " ecn=0x" << std::hex << pi.ecn << std::dec << " " << nread
+ << " bytes" << std::endl;
+ }
+
+ if (debug::packet_lost(config.rx_loss_prob)) {
+ if (!config.quiet) {
+ std::cerr << "** Simulated incoming packet loss **" << std::endl;
+ }
+ break;
+ }
+
+ if (feed_data(ep, &su.sa, msg.msg_namelen, &pi, buf.data(), nread) != 0) {
+ return -1;
+ }
+
+ if (++pktcnt >= 10) {
+ break;
+ }
+ }
+
+ if (should_exit_) {
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(0), nullptr, 0);
+ disconnect();
+ return -1;
+ }
+
+ update_timer();
+
+ return 0;
+}
+
+int Client::handle_expiry() {
+ auto now = util::timestamp(loop_);
+ if (auto rv = ngtcp2_conn_handle_expiry(conn_, now); rv != 0) {
+ std::cerr << "ngtcp2_conn_handle_expiry: " << ngtcp2_strerror(rv)
+ << std::endl;
+ ngtcp2_connection_close_error_set_transport_error_liberr(&last_error_, rv,
+ nullptr, 0);
+ disconnect();
+ return -1;
+ }
+
+ return 0;
+}
+
+int Client::on_write() {
+ if (tx_.send_blocked) {
+ if (auto rv = send_blocked_packet(); rv != 0) {
+ return rv;
+ }
+
+ if (tx_.send_blocked) {
+ return 0;
+ }
+ }
+
+ if (auto rv = write_streams(); rv != 0) {
+ return rv;
+ }
+
+ if (should_exit_) {
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(0), nullptr, 0);
+ disconnect();
+ return -1;
+ }
+
+ update_timer();
+ return 0;
+}
+
+int Client::write_streams() {
+ std::array<nghttp3_vec, 16> vec;
+ ngtcp2_path_storage ps;
+ size_t pktcnt = 0;
+ auto max_udp_payload_size = ngtcp2_conn_get_max_tx_udp_payload_size(conn_);
+ auto max_pktcnt = ngtcp2_conn_get_send_quantum(conn_) / max_udp_payload_size;
+ auto ts = util::timestamp(loop_);
+
+ ngtcp2_path_storage_zero(&ps);
+
+ for (;;) {
+ int64_t stream_id = -1;
+ int fin = 0;
+ nghttp3_ssize sveccnt = 0;
+
+ if (httpconn_ && ngtcp2_conn_get_max_data_left(conn_)) {
+ sveccnt = nghttp3_conn_writev_stream(httpconn_, &stream_id, &fin,
+ vec.data(), vec.size());
+ if (sveccnt < 0) {
+ std::cerr << "nghttp3_conn_writev_stream: " << nghttp3_strerror(sveccnt)
+ << std::endl;
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(sveccnt),
+ nullptr, 0);
+ disconnect();
+ return -1;
+ }
+ }
+
+ ngtcp2_ssize ndatalen;
+ auto v = vec.data();
+ auto vcnt = static_cast<size_t>(sveccnt);
+
+ uint32_t flags = NGTCP2_WRITE_STREAM_FLAG_MORE;
+ if (fin) {
+ flags |= NGTCP2_WRITE_STREAM_FLAG_FIN;
+ }
+
+ ngtcp2_pkt_info pi;
+
+ auto nwrite = ngtcp2_conn_writev_stream(
+ conn_, &ps.path, &pi, tx_.data.data(), max_udp_payload_size, &ndatalen,
+ flags, stream_id, reinterpret_cast<const ngtcp2_vec *>(v), vcnt, ts);
+ if (nwrite < 0) {
+ switch (nwrite) {
+ case NGTCP2_ERR_STREAM_DATA_BLOCKED:
+ assert(ndatalen == -1);
+ nghttp3_conn_block_stream(httpconn_, stream_id);
+ continue;
+ case NGTCP2_ERR_STREAM_SHUT_WR:
+ assert(ndatalen == -1);
+ nghttp3_conn_shutdown_stream_write(httpconn_, stream_id);
+ continue;
+ case NGTCP2_ERR_WRITE_MORE:
+ assert(ndatalen >= 0);
+ if (auto rv =
+ nghttp3_conn_add_write_offset(httpconn_, stream_id, ndatalen);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_add_write_offset: " << nghttp3_strerror(rv)
+ << std::endl;
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(rv), nullptr,
+ 0);
+ disconnect();
+ return -1;
+ }
+ continue;
+ }
+
+ assert(ndatalen == -1);
+
+ std::cerr << "ngtcp2_conn_write_stream: " << ngtcp2_strerror(nwrite)
+ << std::endl;
+ ngtcp2_connection_close_error_set_transport_error_liberr(
+ &last_error_, nwrite, nullptr, 0);
+ disconnect();
+ return -1;
+ } else if (ndatalen >= 0) {
+ if (auto rv =
+ nghttp3_conn_add_write_offset(httpconn_, stream_id, ndatalen);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_add_write_offset: " << nghttp3_strerror(rv)
+ << std::endl;
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(rv), nullptr,
+ 0);
+ disconnect();
+ return -1;
+ }
+ }
+
+ if (nwrite == 0) {
+ // We are congestion limited.
+ ngtcp2_conn_update_pkt_tx_time(conn_, ts);
+ ev_io_stop(loop_, &wev_);
+ return 0;
+ }
+
+ auto &ep = *static_cast<Endpoint *>(ps.path.user_data);
+
+ if (auto rv =
+ send_packet(ep, ps.path.remote, pi.ecn, tx_.data.data(), nwrite);
+ rv != NETWORK_ERR_OK) {
+ if (rv != NETWORK_ERR_SEND_BLOCKED) {
+ ngtcp2_connection_close_error_set_transport_error_liberr(
+ &last_error_, NGTCP2_ERR_INTERNAL, nullptr, 0);
+ disconnect();
+
+ return rv;
+ }
+
+ ngtcp2_conn_update_pkt_tx_time(conn_, ts);
+ on_send_blocked(ep, ps.path.remote, pi.ecn, nwrite);
+
+ return 0;
+ }
+
+ if (++pktcnt == max_pktcnt) {
+ ngtcp2_conn_update_pkt_tx_time(conn_, ts);
+ start_wev_endpoint(ep);
+ return 0;
+ }
+ }
+}
+
+void Client::update_timer() {
+ auto expiry = ngtcp2_conn_get_expiry(conn_);
+ auto now = util::timestamp(loop_);
+
+ if (expiry <= now) {
+ if (!config.quiet) {
+ auto t = static_cast<ev_tstamp>(now - expiry) / NGTCP2_SECONDS;
+ std::cerr << "Timer has already expired: " << t << "s" << std::endl;
+ }
+
+ ev_feed_event(loop_, &timer_, EV_TIMER);
+
+ return;
+ }
+
+ auto t = static_cast<ev_tstamp>(expiry - now) / NGTCP2_SECONDS;
+ if (!config.quiet) {
+ std::cerr << "Set timer=" << std::fixed << t << "s" << std::defaultfloat
+ << std::endl;
+ }
+ timer_.repeat = t;
+ ev_timer_again(loop_, &timer_);
+}
+
+#ifdef HAVE_LINUX_RTNETLINK_H
+namespace {
+int bind_addr(Address &local_addr, int fd, const in_addr_union *iau,
+ int family) {
+ addrinfo hints{};
+ addrinfo *res, *rp;
+
+ hints.ai_family = family;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_flags = AI_PASSIVE;
+
+ char *node;
+ std::array<char, NI_MAXHOST> nodebuf;
+
+ if (iau) {
+ if (inet_ntop(family, iau, nodebuf.data(), nodebuf.size()) == nullptr) {
+ std::cerr << "inet_ntop: " << strerror(errno) << std::endl;
+ return -1;
+ }
+
+ node = nodebuf.data();
+ } else {
+ node = nullptr;
+ }
+
+ if (auto rv = getaddrinfo(node, "0", &hints, &res); rv != 0) {
+ std::cerr << "getaddrinfo: " << gai_strerror(rv) << std::endl;
+ return -1;
+ }
+
+ auto res_d = defer(freeaddrinfo, res);
+
+ for (rp = res; rp; rp = rp->ai_next) {
+ if (bind(fd, rp->ai_addr, rp->ai_addrlen) != -1) {
+ break;
+ }
+ }
+
+ if (!rp) {
+ std::cerr << "Could not bind" << std::endl;
+ return -1;
+ }
+
+ socklen_t len = sizeof(local_addr.su.storage);
+ if (getsockname(fd, &local_addr.su.sa, &len) == -1) {
+ std::cerr << "getsockname: " << strerror(errno) << std::endl;
+ return -1;
+ }
+ local_addr.len = len;
+ local_addr.ifindex = 0;
+
+ return 0;
+}
+} // namespace
+#endif // HAVE_LINUX_RTNETLINK_H
+
+#ifndef HAVE_LINUX_RTNETLINK_H
+namespace {
+int connect_sock(Address &local_addr, int fd, const Address &remote_addr) {
+ if (connect(fd, &remote_addr.su.sa, remote_addr.len) != 0) {
+ std::cerr << "connect: " << strerror(errno) << std::endl;
+ return -1;
+ }
+
+ socklen_t len = sizeof(local_addr.su.storage);
+ if (getsockname(fd, &local_addr.su.sa, &len) == -1) {
+ std::cerr << "getsockname: " << strerror(errno) << std::endl;
+ return -1;
+ }
+ local_addr.len = len;
+ local_addr.ifindex = 0;
+
+ return 0;
+}
+} // namespace
+#endif // !HAVE_LINUX_RTNETLINK_H
+
+namespace {
+int udp_sock(int family) {
+ auto fd = util::create_nonblock_socket(family, SOCK_DGRAM, IPPROTO_UDP);
+ if (fd == -1) {
+ return -1;
+ }
+
+ fd_set_recv_ecn(fd, family);
+ fd_set_ip_mtu_discover(fd, family);
+ fd_set_ip_dontfrag(fd, family);
+
+ return fd;
+}
+} // namespace
+
+namespace {
+int create_sock(Address &remote_addr, const char *addr, const char *port) {
+ addrinfo hints{};
+ addrinfo *res, *rp;
+
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_DGRAM;
+
+ if (auto rv = getaddrinfo(addr, port, &hints, &res); rv != 0) {
+ std::cerr << "getaddrinfo: " << gai_strerror(rv) << std::endl;
+ return -1;
+ }
+
+ auto res_d = defer(freeaddrinfo, res);
+
+ int fd = -1;
+
+ for (rp = res; rp; rp = rp->ai_next) {
+ fd = udp_sock(rp->ai_family);
+ if (fd == -1) {
+ continue;
+ }
+
+ break;
+ }
+
+ if (!rp) {
+ std::cerr << "Could not create socket" << std::endl;
+ return -1;
+ }
+
+ remote_addr.len = rp->ai_addrlen;
+ memcpy(&remote_addr.su, rp->ai_addr, rp->ai_addrlen);
+
+ return fd;
+}
+} // namespace
+
+std::optional<Endpoint *> Client::endpoint_for(const Address &remote_addr) {
+#ifdef HAVE_LINUX_RTNETLINK_H
+ in_addr_union iau;
+
+ if (get_local_addr(iau, remote_addr) != 0) {
+ std::cerr << "Could not get local address for a selected preferred address"
+ << std::endl;
+ return nullptr;
+ }
+
+ auto current_path = ngtcp2_conn_get_path(conn_);
+ auto current_ep = static_cast<Endpoint *>(current_path->user_data);
+ if (addreq(&current_ep->addr.su.sa, iau)) {
+ return current_ep;
+ }
+#endif // HAVE_LINUX_RTNETLINK_H
+
+ auto fd = udp_sock(remote_addr.su.sa.sa_family);
+ if (fd == -1) {
+ return nullptr;
+ }
+
+ Address local_addr;
+
+#ifdef HAVE_LINUX_RTNETLINK_H
+ if (bind_addr(local_addr, fd, &iau, remote_addr.su.sa.sa_family) != 0) {
+ close(fd);
+ return nullptr;
+ }
+#else // !HAVE_LINUX_RTNETLINK_H
+ if (connect_sock(local_addr, fd, remote_addr) != 0) {
+ close(fd);
+ return nullptr;
+ }
+#endif // !HAVE_LINUX_RTNETLINK_H
+
+ endpoints_.emplace_back();
+ auto &ep = endpoints_.back();
+ ep.addr = local_addr;
+ ep.client = this;
+ ep.fd = fd;
+ ev_io_init(&ep.rev, readcb, fd, EV_READ);
+ ep.rev.data = &ep;
+
+ ev_io_start(loop_, &ep.rev);
+
+ return &ep;
+}
+
+void Client::start_change_local_addr_timer() {
+ ev_timer_start(loop_, &change_local_addr_timer_);
+}
+
+int Client::change_local_addr() {
+ Address local_addr;
+
+ if (!config.quiet) {
+ std::cerr << "Changing local address" << std::endl;
+ }
+
+ auto nfd = udp_sock(remote_addr_.su.sa.sa_family);
+ if (nfd == -1) {
+ return -1;
+ }
+
+#ifdef HAVE_LINUX_RTNETLINK_H
+ in_addr_union iau;
+
+ if (get_local_addr(iau, remote_addr_) != 0) {
+ std::cerr << "Could not get local address" << std::endl;
+ close(nfd);
+ return -1;
+ }
+
+ if (bind_addr(local_addr, nfd, &iau, remote_addr_.su.sa.sa_family) != 0) {
+ close(nfd);
+ return -1;
+ }
+#else // !HAVE_LINUX_RTNETLINK_H
+ if (connect_sock(local_addr, nfd, remote_addr_) != 0) {
+ close(nfd);
+ return -1;
+ }
+#endif // !HAVE_LINUX_RTNETLINK_H
+
+ if (!config.quiet) {
+ std::cerr << "Local address is now "
+ << util::straddr(&local_addr.su.sa, local_addr.len) << std::endl;
+ }
+
+ endpoints_.emplace_back();
+ auto &ep = endpoints_.back();
+ ep.addr = local_addr;
+ ep.client = this;
+ ep.fd = nfd;
+ ev_io_init(&ep.rev, readcb, nfd, EV_READ);
+ ep.rev.data = &ep;
+
+ ngtcp2_addr addr;
+ ngtcp2_addr_init(&addr, &local_addr.su.sa, local_addr.len);
+
+ if (config.nat_rebinding) {
+ ngtcp2_conn_set_local_addr(conn_, &addr);
+ ngtcp2_conn_set_path_user_data(conn_, &ep);
+ } else {
+ auto path = ngtcp2_path{
+ addr,
+ {
+ const_cast<sockaddr *>(&remote_addr_.su.sa),
+ remote_addr_.len,
+ },
+ &ep,
+ };
+ if (auto rv = ngtcp2_conn_initiate_immediate_migration(
+ conn_, &path, util::timestamp(loop_));
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_initiate_immediate_migration: "
+ << ngtcp2_strerror(rv) << std::endl;
+ }
+ }
+
+ ev_io_start(loop_, &ep.rev);
+
+ return 0;
+}
+
+void Client::start_key_update_timer() {
+ ev_timer_start(loop_, &key_update_timer_);
+}
+
+int Client::update_key(uint8_t *rx_secret, uint8_t *tx_secret,
+ ngtcp2_crypto_aead_ctx *rx_aead_ctx, uint8_t *rx_iv,
+ ngtcp2_crypto_aead_ctx *tx_aead_ctx, uint8_t *tx_iv,
+ const uint8_t *current_rx_secret,
+ const uint8_t *current_tx_secret, size_t secretlen) {
+ if (!config.quiet) {
+ std::cerr << "Updating traffic key" << std::endl;
+ }
+
+ auto crypto_ctx = ngtcp2_conn_get_crypto_ctx(conn_);
+ auto aead = &crypto_ctx->aead;
+ auto keylen = ngtcp2_crypto_aead_keylen(aead);
+ auto ivlen = ngtcp2_crypto_packet_protection_ivlen(aead);
+
+ ++nkey_update_;
+
+ std::array<uint8_t, 64> rx_key, tx_key;
+
+ if (ngtcp2_crypto_update_key(conn_, rx_secret, tx_secret, rx_aead_ctx,
+ rx_key.data(), rx_iv, tx_aead_ctx, tx_key.data(),
+ tx_iv, current_rx_secret, current_tx_secret,
+ secretlen) != 0) {
+ return -1;
+ }
+
+ if (!config.quiet && config.show_secret) {
+ std::cerr << "application_traffic rx secret " << nkey_update_ << std::endl;
+ debug::print_secrets(rx_secret, secretlen, rx_key.data(), keylen, rx_iv,
+ ivlen);
+ std::cerr << "application_traffic tx secret " << nkey_update_ << std::endl;
+ debug::print_secrets(tx_secret, secretlen, tx_key.data(), keylen, tx_iv,
+ ivlen);
+ }
+
+ return 0;
+}
+
+int Client::initiate_key_update() {
+ if (!config.quiet) {
+ std::cerr << "Initiate key update" << std::endl;
+ }
+
+ if (auto rv = ngtcp2_conn_initiate_key_update(conn_, util::timestamp(loop_));
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_initiate_key_update: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ return 0;
+}
+
+void Client::start_delay_stream_timer() {
+ ev_timer_start(loop_, &delay_stream_timer_);
+}
+
+int Client::send_packet(const Endpoint &ep, const ngtcp2_addr &remote_addr,
+ unsigned int ecn, const uint8_t *data, size_t datalen) {
+ if (debug::packet_lost(config.tx_loss_prob)) {
+ if (!config.quiet) {
+ std::cerr << "** Simulated outgoing packet loss **" << std::endl;
+ }
+ return NETWORK_ERR_OK;
+ }
+
+ iovec msg_iov;
+ msg_iov.iov_base = const_cast<uint8_t *>(data);
+ msg_iov.iov_len = datalen;
+
+ msghdr msg{};
+#ifdef HAVE_LINUX_RTNETLINK_H
+ msg.msg_name = const_cast<sockaddr *>(remote_addr.addr);
+ msg.msg_namelen = remote_addr.addrlen;
+#endif // HAVE_LINUX_RTNETLINK_H
+ msg.msg_iov = &msg_iov;
+ msg.msg_iovlen = 1;
+
+ fd_set_ecn(ep.fd, remote_addr.addr->sa_family, ecn);
+
+ ssize_t nwrite = 0;
+
+ do {
+ nwrite = sendmsg(ep.fd, &msg, 0);
+ } while (nwrite == -1 && errno == EINTR);
+
+ if (nwrite == -1) {
+ if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ return NETWORK_ERR_SEND_BLOCKED;
+ }
+ std::cerr << "sendmsg: " << strerror(errno) << std::endl;
+ if (errno == EMSGSIZE) {
+ return 0;
+ }
+ return NETWORK_ERR_FATAL;
+ }
+
+ assert(static_cast<size_t>(nwrite) == datalen);
+
+ if (!config.quiet) {
+ std::cerr << "Sent packet: local="
+ << util::straddr(&ep.addr.su.sa, ep.addr.len) << " remote="
+ << util::straddr(remote_addr.addr, remote_addr.addrlen)
+ << " ecn=0x" << std::hex << ecn << std::dec << " " << nwrite
+ << " bytes" << std::endl;
+ }
+
+ return NETWORK_ERR_OK;
+}
+
+void Client::on_send_blocked(const Endpoint &ep, const ngtcp2_addr &remote_addr,
+ unsigned int ecn, size_t datalen) {
+ assert(!tx_.send_blocked);
+
+ tx_.send_blocked = true;
+
+ memcpy(&tx_.blocked.remote_addr.su, remote_addr.addr, remote_addr.addrlen);
+ tx_.blocked.remote_addr.len = remote_addr.addrlen;
+ tx_.blocked.ecn = ecn;
+ tx_.blocked.datalen = datalen;
+ tx_.blocked.endpoint = &ep;
+
+ start_wev_endpoint(ep);
+}
+
+void Client::start_wev_endpoint(const Endpoint &ep) {
+ // We do not close ep.fd, so we can expect that each Endpoint has
+ // unique fd.
+ if (ep.fd != wev_.fd) {
+ if (ev_is_active(&wev_)) {
+ ev_io_stop(loop_, &wev_);
+ }
+
+ ev_io_set(&wev_, ep.fd, EV_WRITE);
+ }
+
+ ev_io_start(loop_, &wev_);
+}
+
+int Client::send_blocked_packet() {
+ assert(tx_.send_blocked);
+
+ ngtcp2_addr remote_addr{
+ .addr = &tx_.blocked.remote_addr.su.sa,
+ .addrlen = tx_.blocked.remote_addr.len,
+ };
+
+ auto rv = send_packet(*tx_.blocked.endpoint, remote_addr, tx_.blocked.ecn,
+ tx_.data.data(), tx_.blocked.datalen);
+ if (rv != 0) {
+ if (rv == NETWORK_ERR_SEND_BLOCKED) {
+ assert(wev_.fd == tx_.blocked.endpoint->fd);
+
+ ev_io_start(loop_, &wev_);
+
+ return 0;
+ }
+
+ ngtcp2_connection_close_error_set_transport_error_liberr(
+ &last_error_, NGTCP2_ERR_INTERNAL, nullptr, 0);
+ disconnect();
+
+ return rv;
+ }
+
+ tx_.send_blocked = false;
+
+ return 0;
+}
+
+int Client::handle_error() {
+ if (!conn_ || ngtcp2_conn_is_in_closing_period(conn_) ||
+ ngtcp2_conn_is_in_draining_period(conn_)) {
+ return 0;
+ }
+
+ std::array<uint8_t, NGTCP2_MAX_UDP_PAYLOAD_SIZE> buf;
+
+ ngtcp2_path_storage ps;
+
+ ngtcp2_path_storage_zero(&ps);
+
+ ngtcp2_pkt_info pi;
+
+ auto nwrite = ngtcp2_conn_write_connection_close(
+ conn_, &ps.path, &pi, buf.data(), buf.size(), &last_error_,
+ util::timestamp(loop_));
+ if (nwrite < 0) {
+ std::cerr << "ngtcp2_conn_write_connection_close: "
+ << ngtcp2_strerror(nwrite) << std::endl;
+ return -1;
+ }
+
+ if (nwrite == 0) {
+ return 0;
+ }
+
+ return send_packet(*static_cast<Endpoint *>(ps.path.user_data),
+ ps.path.remote, pi.ecn, buf.data(), nwrite);
+}
+
+int Client::on_stream_close(int64_t stream_id, uint64_t app_error_code) {
+ if (httpconn_) {
+ if (app_error_code == 0) {
+ app_error_code = NGHTTP3_H3_NO_ERROR;
+ }
+ auto rv = nghttp3_conn_close_stream(httpconn_, stream_id, app_error_code);
+ switch (rv) {
+ case 0:
+ break;
+ case NGHTTP3_ERR_STREAM_NOT_FOUND:
+ // We have to handle the case when stream opened but no data is
+ // transferred. In this case, nghttp3_conn_close_stream might
+ // return error.
+ if (!ngtcp2_is_bidi_stream(stream_id)) {
+ assert(!ngtcp2_conn_is_local_stream(conn_, stream_id));
+ ngtcp2_conn_extend_max_streams_uni(conn_, 1);
+ }
+ break;
+ default:
+ std::cerr << "nghttp3_conn_close_stream: " << nghttp3_strerror(rv)
+ << std::endl;
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(rv), nullptr, 0);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int Client::on_stream_reset(int64_t stream_id) {
+ if (httpconn_) {
+ if (auto rv = nghttp3_conn_shutdown_stream_read(httpconn_, stream_id);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_shutdown_stream_read: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int Client::on_stream_stop_sending(int64_t stream_id) {
+ if (!httpconn_) {
+ return 0;
+ }
+
+ if (auto rv = nghttp3_conn_shutdown_stream_read(httpconn_, stream_id);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_shutdown_stream_read: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ return 0;
+}
+
+int Client::make_stream_early() {
+ if (setup_httpconn() != 0) {
+ return -1;
+ }
+
+ return on_extend_max_streams();
+}
+
+int Client::on_extend_max_streams() {
+ int64_t stream_id;
+
+ if ((config.delay_stream && !handshake_confirmed_) ||
+ ev_is_active(&delay_stream_timer_)) {
+ return 0;
+ }
+
+ for (; nstreams_done_ < config.nstreams; ++nstreams_done_) {
+ if (auto rv = ngtcp2_conn_open_bidi_stream(conn_, &stream_id, nullptr);
+ rv != 0) {
+ assert(NGTCP2_ERR_STREAM_ID_BLOCKED == rv);
+ break;
+ }
+
+ auto stream = std::make_unique<Stream>(
+ config.requests[nstreams_done_ % config.requests.size()], stream_id);
+
+ if (submit_http_request(stream.get()) != 0) {
+ break;
+ }
+
+ if (!config.download.empty()) {
+ stream->open_file(stream->req.path);
+ }
+ streams_.emplace(stream_id, std::move(stream));
+ }
+ return 0;
+}
+
+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) {
+ vec[0].base = config.data;
+ vec[0].len = config.datalen;
+ *pflags |= NGHTTP3_DATA_FLAG_EOF;
+
+ return 1;
+}
+} // namespace
+
+int Client::submit_http_request(const Stream *stream) {
+ std::string content_length_str;
+
+ const auto &req = stream->req;
+
+ std::array<nghttp3_nv, 6> nva{
+ util::make_nv_nn(":method", config.http_method),
+ util::make_nv_nn(":scheme", req.scheme),
+ util::make_nv_nn(":authority", req.authority),
+ util::make_nv_nn(":path", req.path),
+ util::make_nv_nn("user-agent", "nghttp3/ngtcp2 client"),
+ };
+ size_t nvlen = 5;
+ if (config.fd != -1) {
+ content_length_str = util::format_uint(config.datalen);
+ nva[nvlen++] = util::make_nv_nc("content-length", content_length_str);
+ }
+
+ if (!config.quiet) {
+ debug::print_http_request_headers(stream->stream_id, nva.data(), nvlen);
+ }
+
+ nghttp3_data_reader dr{};
+ dr.read_data = read_data;
+
+ if (auto rv = nghttp3_conn_submit_request(
+ httpconn_, stream->stream_id, nva.data(), nvlen,
+ config.fd == -1 ? nullptr : &dr, nullptr);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_submit_request: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ return 0;
+}
+
+int Client::recv_stream_data(uint32_t flags, int64_t stream_id,
+ const uint8_t *data, size_t datalen) {
+ auto nconsumed = nghttp3_conn_read_stream(
+ httpconn_, stream_id, data, datalen, flags & NGTCP2_STREAM_DATA_FLAG_FIN);
+ if (nconsumed < 0) {
+ std::cerr << "nghttp3_conn_read_stream: " << nghttp3_strerror(nconsumed)
+ << std::endl;
+ ngtcp2_connection_close_error_set_application_error(
+ &last_error_, nghttp3_err_infer_quic_app_error_code(nconsumed), nullptr,
+ 0);
+ return -1;
+ }
+
+ ngtcp2_conn_extend_max_stream_offset(conn_, stream_id, nconsumed);
+ ngtcp2_conn_extend_max_offset(conn_, nconsumed);
+
+ return 0;
+}
+
+int Client::acked_stream_data_offset(int64_t stream_id, uint64_t datalen) {
+ if (auto rv = nghttp3_conn_add_ack_offset(httpconn_, stream_id, datalen);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_add_ack_offset: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ return 0;
+}
+
+int Client::select_preferred_address(Address &selected_addr,
+ const ngtcp2_preferred_addr *paddr) {
+ auto path = ngtcp2_conn_get_path(conn_);
+
+ switch (path->local.addr->sa_family) {
+ case AF_INET:
+ if (!paddr->ipv4_present) {
+ return -1;
+ }
+ selected_addr.su.in = paddr->ipv4;
+ selected_addr.len = sizeof(paddr->ipv4);
+ break;
+ case AF_INET6:
+ if (!paddr->ipv6_present) {
+ return -1;
+ }
+ selected_addr.su.in6 = paddr->ipv6;
+ selected_addr.len = sizeof(paddr->ipv6);
+ break;
+ default:
+ return -1;
+ }
+
+ char host[NI_MAXHOST], service[NI_MAXSERV];
+ if (auto rv = getnameinfo(&selected_addr.su.sa, selected_addr.len, host,
+ sizeof(host), service, sizeof(service),
+ NI_NUMERICHOST | NI_NUMERICSERV);
+ rv != 0) {
+ std::cerr << "getnameinfo: " << gai_strerror(rv) << std::endl;
+ return -1;
+ }
+
+ if (!config.quiet) {
+ std::cerr << "selected server preferred_address is [" << host
+ << "]:" << service << std::endl;
+ }
+
+ return 0;
+}
+
+namespace {
+int http_recv_data(nghttp3_conn *conn, int64_t stream_id, const uint8_t *data,
+ size_t datalen, void *user_data, void *stream_user_data) {
+ if (!config.quiet && !config.no_http_dump) {
+ debug::print_http_data(stream_id, data, datalen);
+ }
+ auto c = static_cast<Client *>(user_data);
+ c->http_consume(stream_id, datalen);
+ c->http_write_data(stream_id, data, datalen);
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_deferred_consume(nghttp3_conn *conn, int64_t stream_id,
+ size_t nconsumed, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+ c->http_consume(stream_id, nconsumed);
+ return 0;
+}
+} // namespace
+
+void Client::http_consume(int64_t stream_id, size_t nconsumed) {
+ ngtcp2_conn_extend_max_stream_offset(conn_, stream_id, nconsumed);
+ ngtcp2_conn_extend_max_offset(conn_, nconsumed);
+}
+
+void Client::http_write_data(int64_t stream_id, const uint8_t *data,
+ size_t datalen) {
+ auto it = streams_.find(stream_id);
+ if (it == std::end(streams_)) {
+ return;
+ }
+
+ auto &stream = (*it).second;
+
+ if (stream->fd == -1) {
+ return;
+ }
+
+ ssize_t nwrite;
+ do {
+ nwrite = write(stream->fd, data, datalen);
+ } while (nwrite == -1 && errno == EINTR);
+}
+
+namespace {
+int http_begin_headers(nghttp3_conn *conn, int64_t stream_id, void *user_data,
+ void *stream_user_data) {
+ if (!config.quiet) {
+ debug::print_http_begin_response_headers(stream_id);
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_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) {
+ if (!config.quiet) {
+ debug::print_http_header(stream_id, name, value, flags);
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_end_headers(nghttp3_conn *conn, int64_t stream_id, int fin,
+ void *user_data, void *stream_user_data) {
+ if (!config.quiet) {
+ debug::print_http_end_headers(stream_id);
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_begin_trailers(nghttp3_conn *conn, int64_t stream_id, void *user_data,
+ void *stream_user_data) {
+ if (!config.quiet) {
+ debug::print_http_begin_trailers(stream_id);
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_recv_trailer(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) {
+ if (!config.quiet) {
+ debug::print_http_header(stream_id, name, value, flags);
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_end_trailers(nghttp3_conn *conn, int64_t stream_id, int fin,
+ void *user_data, void *stream_user_data) {
+ if (!config.quiet) {
+ debug::print_http_end_trailers(stream_id);
+ }
+ return 0;
+}
+} // namespace
+
+namespace {
+int http_stop_sending(nghttp3_conn *conn, int64_t stream_id,
+ uint64_t app_error_code, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+ if (c->stop_sending(stream_id, app_error_code) != 0) {
+ return NGHTTP3_ERR_CALLBACK_FAILURE;
+ }
+ return 0;
+}
+} // namespace
+
+int Client::stop_sending(int64_t stream_id, uint64_t app_error_code) {
+ if (auto rv =
+ ngtcp2_conn_shutdown_stream_read(conn_, stream_id, app_error_code);
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_shutdown_stream_read: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+ return 0;
+}
+
+namespace {
+int http_reset_stream(nghttp3_conn *conn, int64_t stream_id,
+ uint64_t app_error_code, void *user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(user_data);
+ if (c->reset_stream(stream_id, app_error_code) != 0) {
+ return NGHTTP3_ERR_CALLBACK_FAILURE;
+ }
+ return 0;
+}
+} // namespace
+
+int Client::reset_stream(int64_t stream_id, uint64_t app_error_code) {
+ if (auto rv =
+ ngtcp2_conn_shutdown_stream_write(conn_, stream_id, app_error_code);
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_shutdown_stream_write: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+ return 0;
+}
+
+namespace {
+int http_stream_close(nghttp3_conn *conn, int64_t stream_id,
+ uint64_t app_error_code, void *conn_user_data,
+ void *stream_user_data) {
+ auto c = static_cast<Client *>(conn_user_data);
+ if (c->http_stream_close(stream_id, app_error_code) != 0) {
+ return NGHTTP3_ERR_CALLBACK_FAILURE;
+ }
+ return 0;
+}
+} // namespace
+
+int Client::http_stream_close(int64_t stream_id, uint64_t app_error_code) {
+ if (ngtcp2_is_bidi_stream(stream_id)) {
+ assert(ngtcp2_conn_is_local_stream(conn_, stream_id));
+
+ ++nstreams_closed_;
+
+ if (config.exit_on_first_stream_close ||
+ (config.exit_on_all_streams_close &&
+ config.nstreams == nstreams_done_ &&
+ nstreams_closed_ == nstreams_done_)) {
+ if (handshake_confirmed_) {
+ should_exit_ = true;
+ } else {
+ should_exit_on_handshake_confirmed_ = true;
+ }
+ }
+ } else {
+ assert(!ngtcp2_conn_is_local_stream(conn_, stream_id));
+ ngtcp2_conn_extend_max_streams_uni(conn_, 1);
+ }
+
+ if (auto it = streams_.find(stream_id); it != std::end(streams_)) {
+ if (!config.quiet) {
+ std::cerr << "HTTP stream " << stream_id << " closed with error code "
+ << app_error_code << std::endl;
+ }
+ streams_.erase(it);
+ }
+
+ return 0;
+}
+
+int Client::setup_httpconn() {
+ if (httpconn_) {
+ return 0;
+ }
+
+ if (ngtcp2_conn_get_max_local_streams_uni(conn_) < 3) {
+ std::cerr << "peer does not allow at least 3 unidirectional streams."
+ << std::endl;
+ return -1;
+ }
+
+ nghttp3_callbacks callbacks{
+ nullptr, // acked_stream_data
+ ::http_stream_close,
+ ::http_recv_data,
+ ::http_deferred_consume,
+ ::http_begin_headers,
+ ::http_recv_header,
+ ::http_end_headers,
+ ::http_begin_trailers,
+ ::http_recv_trailer,
+ ::http_end_trailers,
+ ::http_stop_sending,
+ nullptr, // end_stream
+ ::http_reset_stream,
+ nullptr, // shutdown
+ };
+ nghttp3_settings settings;
+ nghttp3_settings_default(&settings);
+ settings.qpack_max_dtable_capacity = 4_k;
+ settings.qpack_blocked_streams = 100;
+
+ auto mem = nghttp3_mem_default();
+
+ if (auto rv =
+ nghttp3_conn_client_new(&httpconn_, &callbacks, &settings, mem, this);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_client_new: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ int64_t ctrl_stream_id;
+
+ if (auto rv = ngtcp2_conn_open_uni_stream(conn_, &ctrl_stream_id, nullptr);
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_open_uni_stream: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ if (auto rv = nghttp3_conn_bind_control_stream(httpconn_, ctrl_stream_id);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_bind_control_stream: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ if (!config.quiet) {
+ fprintf(stderr, "http: control stream=%" PRIx64 "\n", ctrl_stream_id);
+ }
+
+ int64_t qpack_enc_stream_id, qpack_dec_stream_id;
+
+ if (auto rv =
+ ngtcp2_conn_open_uni_stream(conn_, &qpack_enc_stream_id, nullptr);
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_open_uni_stream: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ if (auto rv =
+ ngtcp2_conn_open_uni_stream(conn_, &qpack_dec_stream_id, nullptr);
+ rv != 0) {
+ std::cerr << "ngtcp2_conn_open_uni_stream: " << ngtcp2_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ if (auto rv = nghttp3_conn_bind_qpack_streams(httpconn_, qpack_enc_stream_id,
+ qpack_dec_stream_id);
+ rv != 0) {
+ std::cerr << "nghttp3_conn_bind_qpack_streams: " << nghttp3_strerror(rv)
+ << std::endl;
+ return -1;
+ }
+
+ if (!config.quiet) {
+ fprintf(stderr,
+ "http: QPACK streams encoder=%" PRIx64 " decoder=%" PRIx64 "\n",
+ qpack_enc_stream_id, qpack_dec_stream_id);
+ }
+
+ return 0;
+}
+
+const std::vector<uint32_t> &Client::get_offered_versions() const {
+ return offered_versions_;
+}
+
+bool Client::get_early_data() const { return early_data_; };
+
+namespace {
+int run(Client &c, const char *addr, const char *port,
+ TLSClientContext &tls_ctx) {
+ Address remote_addr, local_addr;
+
+ auto fd = create_sock(remote_addr, addr, port);
+ if (fd == -1) {
+ return -1;
+ }
+
+#ifdef HAVE_LINUX_RTNETLINK_H
+ in_addr_union iau;
+
+ if (get_local_addr(iau, remote_addr) != 0) {
+ std::cerr << "Could not get local address" << std::endl;
+ close(fd);
+ return -1;
+ }
+
+ if (bind_addr(local_addr, fd, &iau, remote_addr.su.sa.sa_family) != 0) {
+ close(fd);
+ return -1;
+ }
+#else // !HAVE_LINUX_RTNETLINK_H
+ if (connect_sock(local_addr, fd, remote_addr) != 0) {
+ close(fd);
+ return -1;
+ }
+#endif // !HAVE_LINUX_RTNETLINK_H
+
+ if (c.init(fd, local_addr, remote_addr, addr, port, tls_ctx) != 0) {
+ return -1;
+ }
+
+ // TODO Do we need this ?
+ if (auto rv = c.on_write(); rv != 0) {
+ return rv;
+ }
+
+ ev_run(EV_DEFAULT, 0);
+
+ return 0;
+}
+} // namespace
+
+namespace {
+std::string_view get_string(const char *uri, const http_parser_url &u,
+ http_parser_url_fields f) {
+ auto p = &u.field_data[f];
+ return {uri + p->off, p->len};
+}
+} // namespace
+
+namespace {
+int parse_uri(Request &req, const char *uri) {
+ http_parser_url u;
+
+ http_parser_url_init(&u);
+ if (http_parser_parse_url(uri, strlen(uri), /* is_connect = */ 0, &u) != 0) {
+ return -1;
+ }
+
+ if (!(u.field_set & (1 << UF_SCHEMA)) || !(u.field_set & (1 << UF_HOST))) {
+ return -1;
+ }
+
+ req.scheme = get_string(uri, u, UF_SCHEMA);
+
+ req.authority = get_string(uri, u, UF_HOST);
+ if (util::numeric_host(req.authority.c_str(), AF_INET6)) {
+ req.authority = '[' + req.authority + ']';
+ }
+ if (u.field_set & (1 << UF_PORT)) {
+ req.authority += ':';
+ req.authority += get_string(uri, u, UF_PORT);
+ }
+
+ if (u.field_set & (1 << UF_PATH)) {
+ req.path = get_string(uri, u, UF_PATH);
+ } else {
+ req.path = "/";
+ }
+
+ if (u.field_set & (1 << UF_QUERY)) {
+ req.path += '?';
+ req.path += get_string(uri, u, UF_QUERY);
+ }
+
+ return 0;
+}
+} // namespace
+
+namespace {
+int parse_requests(char **argv, size_t argvlen) {
+ for (size_t i = 0; i < argvlen; ++i) {
+ auto uri = argv[i];
+ Request req;
+ if (parse_uri(req, uri) != 0) {
+ std::cerr << "Could not parse URI: " << uri << std::endl;
+ return -1;
+ }
+ config.requests.emplace_back(std::move(req));
+ }
+ return 0;
+}
+} // namespace
+
+std::ofstream keylog_file;
+
+namespace {
+void print_usage() {
+ std::cerr << "Usage: client [OPTIONS] <HOST> <PORT> [<URI>...]" << std::endl;
+}
+} // namespace
+
+namespace {
+void config_set_default(Config &config) {
+ config = Config{};
+ config.tx_loss_prob = 0.;
+ config.rx_loss_prob = 0.;
+ config.fd = -1;
+ config.ciphers = util::crypto_default_ciphers();
+ config.groups = util::crypto_default_groups();
+ config.nstreams = 0;
+ config.data = nullptr;
+ config.datalen = 0;
+ config.version = NGTCP2_PROTO_VER_V1;
+ config.timeout = 30 * NGTCP2_SECONDS;
+ config.http_method = "GET"sv;
+ config.max_data = 15_m;
+ config.max_stream_data_bidi_local = 6_m;
+ config.max_stream_data_bidi_remote = 6_m;
+ config.max_stream_data_uni = 6_m;
+ config.max_window = 24_m;
+ config.max_stream_window = 16_m;
+ config.max_streams_uni = 100;
+ config.cc_algo = NGTCP2_CC_ALGO_CUBIC;
+ config.initial_rtt = NGTCP2_DEFAULT_INITIAL_RTT;
+ config.handshake_timeout = NGTCP2_DEFAULT_HANDSHAKE_TIMEOUT;
+ config.ack_thresh = 2;
+}
+} // namespace
+
+namespace {
+void print_help() {
+ print_usage();
+
+ config_set_default(config);
+
+ std::cout << R"(
+ <HOST> Remote server host (DNS name or IP address). In case of
+ DNS name, it will be sent in TLS SNI extension.
+ <PORT> Remote server port
+ <URI> Remote URI
+Options:
+ -t, --tx-loss=<P>
+ The probability of losing outgoing packets. <P> must be
+ [0.0, 1.0], inclusive. 0.0 means no packet loss. 1.0
+ means 100% packet loss.
+ -r, --rx-loss=<P>
+ The probability of losing incoming packets. <P> must be
+ [0.0, 1.0], inclusive. 0.0 means no packet loss. 1.0
+ means 100% packet loss.
+ -d, --data=<PATH>
+ Read data from <PATH>, and send them as STREAM data.
+ -n, --nstreams=<N>
+ The number of requests. <URI>s are used in the order of
+ appearance in the command-line. If the number of <URI>
+ list is less than <N>, <URI> list is wrapped. It
+ defaults to 0 which means the number of <URI> specified.
+ -v, --version=<HEX>
+ Specify QUIC version to use in hex string. If the given
+ version is not supported by libngtcp2, client will use
+ QUIC v1 long packet types. Instead of specifying hex
+ string, there are special aliases available: "v1"
+ indicates QUIC v1, and "v2draft" indicates QUIC v2
+ draft.
+ Default: )"
+ << std::hex << "0x" << config.version << std::dec << R"(
+ --preferred-versions=<HEX>[[,<HEX>]...]
+ Specify QUIC versions in hex string in the order of
+ preference. Client chooses one of those versions if
+ client received Version Negotiation packet from server.
+ These versions must be supported by libngtcp2. Instead
+ of specifying hex string, there are special aliases
+ available: "v1" indicates QUIC v1, and "v2draft"
+ indicates QUIC v2 draft.
+ --other-versions=<HEX>[[,<HEX>]...]
+ Specify QUIC versions in hex string that are sent in
+ other_versions field of version_information transport
+ parameter. This list can include a version which is not
+ supported by libngtcp2. Instead of specifying hex
+ string, there are special aliases available: "v1"
+ indicates QUIC v1, and "v2draft" indicates QUIC v2
+ draft.
+ -q, --quiet Suppress debug output.
+ -s, --show-secret
+ Print out secrets unless --quiet is used.
+ --timeout=<DURATION>
+ Specify idle timeout.
+ Default: )"
+ << util::format_duration(config.timeout) << R"(
+ --ciphers=<CIPHERS>
+ Specify the cipher suite list to enable.
+ Default: )"
+ << config.ciphers << R"(
+ --groups=<GROUPS>
+ Specify the supported groups.
+ Default: )"
+ << config.groups << R"(
+ --session-file=<PATH>
+ Read/write TLS session from/to <PATH>. To resume a
+ session, the previous session must be supplied with this
+ option.
+ --tp-file=<PATH>
+ Read/write QUIC transport parameters from/to <PATH>. To
+ send 0-RTT data, the transport parameters received from
+ the previous session must be supplied with this option.
+ --dcid=<DCID>
+ Specify initial DCID. <DCID> is hex string. When
+ decoded as binary, it should be at least 8 bytes and at
+ most 18 bytes long.
+ --scid=<SCID>
+ Specify source connection ID. <SCID> is hex string. If
+ an empty string is given, zero length connection ID is
+ assumed.
+ --change-local-addr=<DURATION>
+ Client changes local address when <DURATION> elapse
+ after handshake completes.
+ --nat-rebinding
+ When used with --change-local-addr, simulate NAT
+ rebinding. In other words, client changes local
+ address, but it does not start path validation.
+ --key-update=<DURATION>
+ Client initiates key update when <DURATION> elapse after
+ handshake completes.
+ -m, --http-method=<METHOD>
+ Specify HTTP method. Default: )"
+ << config.http_method << R"(
+ --delay-stream=<DURATION>
+ Delay sending STREAM data in 1-RTT for <DURATION> after
+ handshake completes.
+ --no-preferred-addr
+ Do not try to use preferred address offered by server.
+ --key=<PATH>
+ The path to client private key PEM file.
+ --cert=<PATH>
+ The path to client certificate PEM file.
+ --download=<PATH>
+ The path to the directory to save a downloaded content.
+ It is undefined if 2 concurrent requests write to the
+ same file. If a request path does not contain a path
+ component usable as a file name, it defaults to
+ "index.html".
+ --no-quic-dump
+ Disables printing QUIC STREAM and CRYPTO frame data out.
+ --no-http-dump
+ Disables printing HTTP response body out.
+ --qlog-file=<PATH>
+ The path to write qlog. This option and --qlog-dir are
+ mutually exclusive.
+ --qlog-dir=<PATH>
+ Path to the directory where qlog file is stored. The
+ file name of each qlog is the Source Connection ID of
+ client. This option and --qlog-file are mutually
+ exclusive.
+ --max-data=<SIZE>
+ The initial connection-level flow control window.
+ Default: )"
+ << util::format_uint_iec(config.max_data) << R"(
+ --max-stream-data-bidi-local=<SIZE>
+ The initial stream-level flow control window for a
+ bidirectional stream that the local endpoint initiates.
+ Default: )"
+ << util::format_uint_iec(config.max_stream_data_bidi_local) << R"(
+ --max-stream-data-bidi-remote=<SIZE>
+ The initial stream-level flow control window for a
+ bidirectional stream that the remote endpoint initiates.
+ Default: )"
+ << util::format_uint_iec(config.max_stream_data_bidi_remote) << R"(
+ --max-stream-data-uni=<SIZE>
+ The initial stream-level flow control window for a
+ unidirectional stream.
+ Default: )"
+ << util::format_uint_iec(config.max_stream_data_uni) << R"(
+ --max-streams-bidi=<N>
+ The number of the concurrent bidirectional streams.
+ Default: )"
+ << config.max_streams_bidi << R"(
+ --max-streams-uni=<N>
+ The number of the concurrent unidirectional streams.
+ Default: )"
+ << config.max_streams_uni << R"(
+ --exit-on-first-stream-close
+ Exit when a first client initialted HTTP stream is
+ closed.
+ --exit-on-all-streams-close
+ Exit when all client initiated HTTP streams are closed.
+ --disable-early-data
+ Disable early data.
+ --cc=(cubic|reno|bbr|bbr2)
+ The name of congestion controller algorithm.
+ Default: )"
+ << util::strccalgo(config.cc_algo) << R"(
+ --token-file=<PATH>
+ Read/write token from/to <PATH>. Token is obtained from
+ NEW_TOKEN frame from server.
+ --sni=<DNSNAME>
+ Send <DNSNAME> in TLS SNI, overriding the DNS name
+ specified in <HOST>.
+ --initial-rtt=<DURATION>
+ Set an initial RTT.
+ Default: )"
+ << util::format_duration(config.initial_rtt) << R"(
+ --max-window=<SIZE>
+ Maximum connection-level flow control window size. The
+ window auto-tuning is enabled if nonzero value is given,
+ and window size is scaled up to this value.
+ Default: )"
+ << util::format_uint_iec(config.max_window) << R"(
+ --max-stream-window=<SIZE>
+ Maximum stream-level flow control window size. The
+ window auto-tuning is enabled if nonzero value is given,
+ and window size is scaled up to this value.
+ Default: )"
+ << util::format_uint_iec(config.max_stream_window) << R"(
+ --max-udp-payload-size=<SIZE>
+ Override maximum UDP payload size that client transmits.
+ --handshake-timeout=<DURATION>
+ Set the QUIC handshake timeout.
+ Default: )"
+ << util::format_duration(config.handshake_timeout) << R"(
+ --no-pmtud Disables Path MTU Discovery.
+ --ack-thresh=<N>
+ The minimum number of the received ACK eliciting packets
+ that triggers immediate acknowledgement.
+ Default: )"
+ << config.ack_thresh << R"(
+ -h, --help Display this help and exit.
+
+---
+
+ The <SIZE> argument is an integer and an optional unit (e.g., 10K is
+ 10 * 1024). Units are K, M and G (powers of 1024).
+
+ The <DURATION> argument is an integer and an optional unit (e.g., 1s
+ is 1 second and 500ms is 500 milliseconds). Units are h, m, s, ms,
+ us, or ns (hours, minutes, seconds, milliseconds, microseconds, and
+ nanoseconds respectively). If a unit is omitted, a second is used
+ as unit.
+
+ The <HEX> argument is an hex string which must start with "0x"
+ (e.g., 0x00000001).)"
+ << std::endl;
+}
+} // namespace
+
+int main(int argc, char **argv) {
+ config_set_default(config);
+ char *data_path = nullptr;
+ const char *private_key_file = nullptr;
+ const char *cert_file = nullptr;
+
+ for (;;) {
+ static int flag = 0;
+ constexpr static option long_opts[] = {
+ {"help", no_argument, nullptr, 'h'},
+ {"tx-loss", required_argument, nullptr, 't'},
+ {"rx-loss", required_argument, nullptr, 'r'},
+ {"data", required_argument, nullptr, 'd'},
+ {"http-method", required_argument, nullptr, 'm'},
+ {"nstreams", required_argument, nullptr, 'n'},
+ {"version", required_argument, nullptr, 'v'},
+ {"quiet", no_argument, nullptr, 'q'},
+ {"show-secret", no_argument, nullptr, 's'},
+ {"ciphers", required_argument, &flag, 1},
+ {"groups", required_argument, &flag, 2},
+ {"timeout", required_argument, &flag, 3},
+ {"session-file", required_argument, &flag, 4},
+ {"tp-file", required_argument, &flag, 5},
+ {"dcid", required_argument, &flag, 6},
+ {"change-local-addr", required_argument, &flag, 7},
+ {"key-update", required_argument, &flag, 8},
+ {"nat-rebinding", no_argument, &flag, 9},
+ {"delay-stream", required_argument, &flag, 10},
+ {"no-preferred-addr", no_argument, &flag, 11},
+ {"key", required_argument, &flag, 12},
+ {"cert", required_argument, &flag, 13},
+ {"download", required_argument, &flag, 14},
+ {"no-quic-dump", no_argument, &flag, 15},
+ {"no-http-dump", no_argument, &flag, 16},
+ {"qlog-file", required_argument, &flag, 17},
+ {"max-data", required_argument, &flag, 18},
+ {"max-stream-data-bidi-local", required_argument, &flag, 19},
+ {"max-stream-data-bidi-remote", required_argument, &flag, 20},
+ {"max-stream-data-uni", required_argument, &flag, 21},
+ {"max-streams-bidi", required_argument, &flag, 22},
+ {"max-streams-uni", required_argument, &flag, 23},
+ {"exit-on-first-stream-close", no_argument, &flag, 24},
+ {"disable-early-data", no_argument, &flag, 25},
+ {"qlog-dir", required_argument, &flag, 26},
+ {"cc", required_argument, &flag, 27},
+ {"exit-on-all-streams-close", no_argument, &flag, 28},
+ {"token-file", required_argument, &flag, 29},
+ {"sni", required_argument, &flag, 30},
+ {"initial-rtt", required_argument, &flag, 31},
+ {"max-window", required_argument, &flag, 32},
+ {"max-stream-window", required_argument, &flag, 33},
+ {"scid", required_argument, &flag, 34},
+ {"max-udp-payload-size", required_argument, &flag, 35},
+ {"handshake-timeout", required_argument, &flag, 36},
+ {"other-versions", required_argument, &flag, 37},
+ {"no-pmtud", no_argument, &flag, 38},
+ {"preferred-versions", required_argument, &flag, 39},
+ {"ack-thresh", required_argument, &flag, 40},
+ {nullptr, 0, nullptr, 0},
+ };
+
+ auto optidx = 0;
+ auto c = getopt_long(argc, argv, "d:him:n:qr:st:v:", long_opts, &optidx);
+ if (c == -1) {
+ break;
+ }
+ switch (c) {
+ case 'd':
+ // --data
+ data_path = optarg;
+ break;
+ case 'h':
+ // --help
+ print_help();
+ exit(EXIT_SUCCESS);
+ case 'm':
+ // --http-method
+ config.http_method = optarg;
+ break;
+ case 'n':
+ // --streams
+ if (auto n = util::parse_uint(optarg); !n) {
+ std::cerr << "streams: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else if (*n > NGTCP2_MAX_VARINT) {
+ std::cerr << "streams: must not exceed " << NGTCP2_MAX_VARINT
+ << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.nstreams = *n;
+ }
+ break;
+ case 'q':
+ // --quiet
+ config.quiet = true;
+ break;
+ case 'r':
+ // --rx-loss
+ config.rx_loss_prob = strtod(optarg, nullptr);
+ break;
+ case 's':
+ // --show-secret
+ config.show_secret = true;
+ break;
+ case 't':
+ // --tx-loss
+ config.tx_loss_prob = strtod(optarg, nullptr);
+ break;
+ case 'v': {
+ // --version
+ if (optarg == "v1"sv) {
+ config.version = NGTCP2_PROTO_VER_V1;
+ break;
+ }
+ if (optarg == "v2draft"sv) {
+ config.version = NGTCP2_PROTO_VER_V2_DRAFT;
+ break;
+ }
+ auto rv = util::parse_version(optarg);
+ if (!rv) {
+ std::cerr << "version: invalid version " << std::quoted(optarg)
+ << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ config.version = *rv;
+ break;
+ }
+ case '?':
+ print_usage();
+ exit(EXIT_FAILURE);
+ case 0:
+ switch (flag) {
+ case 1:
+ // --ciphers
+ config.ciphers = optarg;
+ break;
+ case 2:
+ // --groups
+ config.groups = optarg;
+ break;
+ case 3:
+ // --timeout
+ if (auto t = util::parse_duration(optarg); !t) {
+ std::cerr << "timeout: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.timeout = *t;
+ }
+ break;
+ case 4:
+ // --session-file
+ config.session_file = optarg;
+ break;
+ case 5:
+ // --tp-file
+ config.tp_file = optarg;
+ break;
+ case 6: {
+ // --dcid
+ auto dcidlen2 = strlen(optarg);
+ if (dcidlen2 % 2 || dcidlen2 / 2 < 8 || dcidlen2 / 2 > 18) {
+ std::cerr << "dcid: wrong length" << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ auto dcid = util::decode_hex(optarg);
+ ngtcp2_cid_init(&config.dcid,
+ reinterpret_cast<const uint8_t *>(dcid.c_str()),
+ dcid.size());
+ break;
+ }
+ case 7:
+ // --change-local-addr
+ if (auto t = util::parse_duration(optarg); !t) {
+ std::cerr << "change-local-addr: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.change_local_addr = *t;
+ }
+ break;
+ case 8:
+ // --key-update
+ if (auto t = util::parse_duration(optarg); !t) {
+ std::cerr << "key-update: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.key_update = *t;
+ }
+ break;
+ case 9:
+ // --nat-rebinding
+ config.nat_rebinding = true;
+ break;
+ case 10:
+ // --delay-stream
+ if (auto t = util::parse_duration(optarg); !t) {
+ std::cerr << "delay-stream: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.delay_stream = *t;
+ }
+ break;
+ case 11:
+ // --no-preferred-addr
+ config.no_preferred_addr = true;
+ break;
+ case 12:
+ // --key
+ private_key_file = optarg;
+ break;
+ case 13:
+ // --cert
+ cert_file = optarg;
+ break;
+ case 14:
+ // --download
+ config.download = optarg;
+ break;
+ case 15:
+ // --no-quic-dump
+ config.no_quic_dump = true;
+ break;
+ case 16:
+ // --no-http-dump
+ config.no_http_dump = true;
+ break;
+ case 17:
+ // --qlog-file
+ config.qlog_file = optarg;
+ break;
+ case 18:
+ // --max-data
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-data: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_data = *n;
+ }
+ break;
+ case 19:
+ // --max-stream-data-bidi-local
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-stream-data-bidi-local: invalid argument"
+ << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_stream_data_bidi_local = *n;
+ }
+ break;
+ case 20:
+ // --max-stream-data-bidi-remote
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-stream-data-bidi-remote: invalid argument"
+ << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_stream_data_bidi_remote = *n;
+ }
+ break;
+ case 21:
+ // --max-stream-data-uni
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-stream-data-uni: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_stream_data_uni = *n;
+ }
+ break;
+ case 22:
+ // --max-streams-bidi
+ if (auto n = util::parse_uint(optarg); !n) {
+ std::cerr << "max-streams-bidi: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_streams_bidi = *n;
+ }
+ break;
+ case 23:
+ // --max-streams-uni
+ if (auto n = util::parse_uint(optarg); !n) {
+ std::cerr << "max-streams-uni: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_streams_uni = *n;
+ }
+ break;
+ case 24:
+ // --exit-on-first-stream-close
+ config.exit_on_first_stream_close = true;
+ break;
+ case 25:
+ // --disable-early-data
+ config.disable_early_data = true;
+ break;
+ case 26:
+ // --qlog-dir
+ config.qlog_dir = optarg;
+ break;
+ case 27:
+ // --cc
+ if (strcmp("cubic", optarg) == 0) {
+ config.cc_algo = NGTCP2_CC_ALGO_CUBIC;
+ break;
+ }
+ if (strcmp("reno", optarg) == 0) {
+ config.cc_algo = NGTCP2_CC_ALGO_RENO;
+ break;
+ }
+ if (strcmp("bbr", optarg) == 0) {
+ config.cc_algo = NGTCP2_CC_ALGO_BBR;
+ break;
+ }
+ if (strcmp("bbr2", optarg) == 0) {
+ config.cc_algo = NGTCP2_CC_ALGO_BBR2;
+ break;
+ }
+ std::cerr << "cc: specify cubic, reno, bbr, or bbr2" << std::endl;
+ exit(EXIT_FAILURE);
+ case 28:
+ // --exit-on-all-streams-close
+ config.exit_on_all_streams_close = true;
+ break;
+ case 29:
+ // --token-file
+ config.token_file = optarg;
+ break;
+ case 30:
+ // --sni
+ config.sni = optarg;
+ break;
+ case 31:
+ // --initial-rtt
+ if (auto t = util::parse_duration(optarg); !t) {
+ std::cerr << "initial-rtt: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.initial_rtt = *t;
+ }
+ break;
+ case 32:
+ // --max-window
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-window: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_window = *n;
+ }
+ break;
+ case 33:
+ // --max-stream-window
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-stream-window: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.max_stream_window = *n;
+ }
+ break;
+ case 34: {
+ // --scid
+ auto scid = util::decode_hex(optarg);
+ ngtcp2_cid_init(&config.scid,
+ reinterpret_cast<const uint8_t *>(scid.c_str()),
+ scid.size());
+ config.scid_present = true;
+ break;
+ }
+ case 35:
+ // --max-udp-payload-size
+ if (auto n = util::parse_uint_iec(optarg); !n) {
+ std::cerr << "max-udp-payload-size: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else if (*n > 64_k) {
+ std::cerr << "max-udp-payload-size: must not exceed 65536"
+ << std::endl;
+ exit(EXIT_FAILURE);
+ } else if (*n == 0) {
+ std::cerr << "max-udp-payload-size: must not be 0" << std::endl;
+ } else {
+ config.max_udp_payload_size = *n;
+ }
+ break;
+ case 36:
+ // --handshake-timeout
+ if (auto t = util::parse_duration(optarg); !t) {
+ std::cerr << "handshake-timeout: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.handshake_timeout = *t;
+ }
+ break;
+ case 37: {
+ // --other-versions
+ if (strlen(optarg) == 0) {
+ config.other_versions.resize(0);
+ break;
+ }
+ auto l = util::split_str(optarg);
+ config.other_versions.resize(l.size());
+ auto it = std::begin(config.other_versions);
+ for (const auto &k : l) {
+ if (k == "v1"sv) {
+ *it++ = NGTCP2_PROTO_VER_V1;
+ continue;
+ }
+ if (k == "v2draft"sv) {
+ *it++ = NGTCP2_PROTO_VER_V2_DRAFT;
+ continue;
+ }
+ auto rv = util::parse_version(k);
+ if (!rv) {
+ std::cerr << "other-versions: invalid version " << std::quoted(k)
+ << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ *it++ = *rv;
+ }
+ break;
+ }
+ case 38:
+ // --no-pmtud
+ config.no_pmtud = true;
+ break;
+ case 39: {
+ // --preferred-versions
+ auto l = util::split_str(optarg);
+ if (l.size() > max_preferred_versionslen) {
+ std::cerr << "preferred-versions: too many versions > "
+ << max_preferred_versionslen << std::endl;
+ }
+ config.preferred_versions.resize(l.size());
+ auto it = std::begin(config.preferred_versions);
+ for (const auto &k : l) {
+ if (k == "v1"sv) {
+ *it++ = NGTCP2_PROTO_VER_V1;
+ continue;
+ }
+ if (k == "v2draft"sv) {
+ *it++ = NGTCP2_PROTO_VER_V2_DRAFT;
+ continue;
+ }
+ auto rv = util::parse_version(k);
+ if (!rv) {
+ std::cerr << "preferred-versions: invalid version "
+ << std::quoted(k) << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ if (!ngtcp2_is_supported_version(*rv)) {
+ std::cerr << "preferred-versions: unsupported version "
+ << std::quoted(k) << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ *it++ = *rv;
+ }
+ break;
+ }
+ case 40:
+ // --ack-thresh
+ if (auto n = util::parse_uint(optarg); !n) {
+ std::cerr << "ack-thresh: invalid argument" << std::endl;
+ exit(EXIT_FAILURE);
+ } else if (*n > 100) {
+ std::cerr << "ack-thresh: must not exceed 100" << std::endl;
+ exit(EXIT_FAILURE);
+ } else {
+ config.ack_thresh = *n;
+ }
+ break;
+ }
+ break;
+ default:
+ break;
+ };
+ }
+
+ if (argc - optind < 2) {
+ std::cerr << "Too few arguments" << std::endl;
+ print_usage();
+ exit(EXIT_FAILURE);
+ }
+
+ if (!config.qlog_file.empty() && !config.qlog_dir.empty()) {
+ std::cerr << "qlog-file and qlog-dir are mutually exclusive" << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ if (config.exit_on_first_stream_close && config.exit_on_all_streams_close) {
+ std::cerr << "exit-on-first-stream-close and exit-on-all-streams-close are "
+ "mutually exclusive"
+ << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ if (data_path) {
+ auto fd = open(data_path, O_RDONLY);
+ if (fd == -1) {
+ std::cerr << "data: Could not open file " << data_path << ": "
+ << strerror(errno) << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ struct stat st;
+ if (fstat(fd, &st) != 0) {
+ std::cerr << "data: Could not stat file " << data_path << ": "
+ << strerror(errno) << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ config.fd = fd;
+ config.datalen = st.st_size;
+ auto addr = mmap(nullptr, config.datalen, PROT_READ, MAP_SHARED, fd, 0);
+ if (addr == MAP_FAILED) {
+ std::cerr << "data: Could not mmap file " << data_path << ": "
+ << strerror(errno) << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ config.data = static_cast<uint8_t *>(addr);
+ }
+
+ auto addr = argv[optind++];
+ auto port = argv[optind++];
+
+ if (parse_requests(&argv[optind], argc - optind) != 0) {
+ exit(EXIT_FAILURE);
+ }
+
+ if (!ngtcp2_is_reserved_version(config.version)) {
+ if (!config.preferred_versions.empty() &&
+ std::find(std::begin(config.preferred_versions),
+ std::end(config.preferred_versions),
+ config.version) == std::end(config.preferred_versions)) {
+ std::cerr << "preferred-version: must include version "
+ << "0x" << config.version << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ if (!config.other_versions.empty() &&
+ std::find(std::begin(config.other_versions),
+ std::end(config.other_versions),
+ config.version) == std::end(config.other_versions)) {
+ std::cerr << "other-versions: must include version "
+ << "0x" << config.version << std::endl;
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (config.nstreams == 0) {
+ config.nstreams = config.requests.size();
+ }
+
+ TLSClientContext tls_ctx;
+ if (tls_ctx.init(private_key_file, cert_file) != 0) {
+ exit(EXIT_FAILURE);
+ }
+
+ auto ev_loop_d = defer(ev_loop_destroy, EV_DEFAULT);
+
+ auto keylog_filename = getenv("SSLKEYLOGFILE");
+ if (keylog_filename) {
+ keylog_file.open(keylog_filename, std::ios_base::app);
+ if (keylog_file) {
+ tls_ctx.enable_keylog();
+ }
+ }
+
+ if (util::generate_secret(config.static_secret.data(),
+ config.static_secret.size()) != 0) {
+ std::cerr << "Unable to generate static secret" << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ auto client_chosen_version = config.version;
+
+ for (;;) {
+ Client c(EV_DEFAULT, client_chosen_version, config.version);
+
+ if (run(c, addr, port, tls_ctx) != 0) {
+ exit(EXIT_FAILURE);
+ }
+
+ if (config.preferred_versions.empty()) {
+ break;
+ }
+
+ auto &offered_versions = c.get_offered_versions();
+ if (offered_versions.empty()) {
+ break;
+ }
+
+ client_chosen_version = ngtcp2_select_version(
+ config.preferred_versions.data(), config.preferred_versions.size(),
+ offered_versions.data(), offered_versions.size());
+
+ if (client_chosen_version == 0) {
+ std::cerr << "Unable to select a version" << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ if (!config.quiet) {
+ std::cerr << "Client selected version " << std::hex << "0x"
+ << client_chosen_version << std::dec << std::endl;
+ }
+ }
+
+ return EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-24 12:08:40 +0000