// Copyright (c) 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/third_party/quiche/src/quic/tools/quic_epoll_client_factory.h"

#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>

#include "net/third_party/quiche/src/quic/core/quic_server_id.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_socket_address.h"
#include "net/third_party/quiche/src/quic/tools/quic_client.h"

namespace quic {

namespace {

QuicSocketAddress LookupAddress(std::string host, std::string port) {
  addrinfo hint;
  memset(&hint, 0, sizeof(hint));
  hint.ai_protocol = IPPROTO_UDP;

  addrinfo* info_list = nullptr;
  int result = getaddrinfo(host.c_str(), port.c_str(), &hint, &info_list);
  if (result != 0) {
    QUIC_LOG(ERROR) << "Failed to look up " << host << ": "
                    << gai_strerror(result);
    return QuicSocketAddress();
  }

  CHECK(info_list != nullptr);
  std::unique_ptr<addrinfo, void (*)(addrinfo*)> info_list_owned(info_list,
                                                                 freeaddrinfo);
  return QuicSocketAddress(info_list->ai_addr, info_list->ai_addrlen);
}

}  // namespace

std::unique_ptr<QuicSpdyClientBase> QuicEpollClientFactory::CreateClient(
    std::string host_for_handshake,
    std::string host_for_lookup,
    uint16_t port,
    ParsedQuicVersionVector versions,
    std::unique_ptr<ProofVerifier> verifier) {
  QuicSocketAddress addr = LookupAddress(host_for_lookup, QuicStrCat(port));
  if (!addr.IsInitialized()) {
    QUIC_LOG(ERROR) << "Unable to resolve address: " << host_for_lookup;
    return nullptr;
  }
  QuicServerId server_id(host_for_handshake, port, false);
  return QuicMakeUnique<QuicClient>(addr, server_id, versions, &epoll_server_,
                                    std::move(verifier));
}

}  // namespace quic