Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "net/tools/quic/quic_server.h" |
| 6 | |
| 7 | #include <errno.h> |
| 8 | #include <features.h> |
| 9 | #include <netinet/in.h> |
| 10 | #include <string.h> |
| 11 | #include <sys/epoll.h> |
| 12 | #include <sys/socket.h> |
| 13 | |
| 14 | #include "net/base/ip_endpoint.h" |
| 15 | #include "net/quic/crypto/crypto_handshake.h" |
| 16 | #include "net/quic/crypto/quic_random.h" |
| 17 | #include "net/quic/quic_clock.h" |
| 18 | #include "net/quic/quic_crypto_stream.h" |
| 19 | #include "net/quic/quic_data_reader.h" |
| 20 | #include "net/quic/quic_protocol.h" |
| 21 | #include "net/tools/quic/quic_in_memory_cache.h" |
| 22 | #include "net/tools/quic/quic_socket_utils.h" |
| 23 | |
| 24 | #define MMSG_MORE 0 |
| 25 | |
| 26 | #ifndef SO_RXQ_OVFL |
| 27 | #define SO_RXQ_OVFL 40 |
| 28 | #endif |
| 29 | |
| 30 | const int kEpollFlags = EPOLLIN | EPOLLOUT | EPOLLET; |
| 31 | const int kNumPacketsPerReadCall = 5; // Arbitrary |
| 32 | static const char kSourceAddressTokenSecret[] = "secret"; |
| 33 | |
| 34 | namespace net { |
| 35 | namespace tools { |
| 36 | |
| 37 | QuicServer::QuicServer() |
| 38 | : port_(0), |
| 39 | packets_dropped_(0), |
| 40 | overflow_supported_(false), |
| 41 | use_recvmmsg_(false), |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 42 | crypto_config_(kSourceAddressTokenSecret, QuicRandom::GetInstance()) { |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 43 | // Use hardcoded crypto parameters for now. |
| 44 | config_.SetDefaults(); |
| 45 | Initialize(); |
| 46 | } |
| 47 | |
| 48 | QuicServer::QuicServer(const QuicConfig& config) |
| 49 | : port_(0), |
| 50 | packets_dropped_(0), |
| 51 | overflow_supported_(false), |
| 52 | use_recvmmsg_(false), |
| 53 | config_(config), |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 54 | crypto_config_(kSourceAddressTokenSecret, QuicRandom::GetInstance()) { |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 55 | Initialize(); |
| 56 | } |
| 57 | |
| 58 | void QuicServer::Initialize() { |
| 59 | #if MMSG_MORE |
| 60 | use_recvmmsg_ = true; |
| 61 | #endif |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 62 | epoll_server_.set_timeout_in_us(50 * 1000); |
| 63 | // Initialize the in memory cache now. |
| 64 | QuicInMemoryCache::GetInstance(); |
| 65 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 66 | QuicEpollClock clock(&epoll_server_); |
| 67 | |
| 68 | scoped_ptr<CryptoHandshakeMessage> scfg( |
Torne (Richard Coles) | b2df76e | 2013-05-13 16:52:09 +0100 | [diff] [blame] | 69 | crypto_config_.AddDefaultConfig( |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 70 | QuicRandom::GetInstance(), &clock, |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 71 | QuicCryptoServerConfig::ConfigOptions())); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | QuicServer::~QuicServer() { |
| 75 | } |
| 76 | |
| 77 | bool QuicServer::Listen(const IPEndPoint& address) { |
| 78 | port_ = address.port(); |
| 79 | int address_family = address.GetSockAddrFamily(); |
| 80 | fd_ = socket(address_family, SOCK_DGRAM | SOCK_NONBLOCK, IPPROTO_UDP); |
| 81 | if (fd_ < 0) { |
| 82 | LOG(ERROR) << "CreateSocket() failed: " << strerror(errno); |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | int rc = QuicSocketUtils::SetGetAddressInfo(fd_, address_family); |
| 87 | |
| 88 | if (rc < 0) { |
| 89 | LOG(ERROR) << "IP detection not supported" << strerror(errno); |
| 90 | return false; |
| 91 | } |
| 92 | |
| 93 | int get_overflow = 1; |
| 94 | rc = setsockopt( |
| 95 | fd_, SOL_SOCKET, SO_RXQ_OVFL, &get_overflow, sizeof(get_overflow)); |
| 96 | |
| 97 | if (rc < 0) { |
| 98 | DLOG(WARNING) << "Socket overflow detection not supported"; |
| 99 | } else { |
| 100 | overflow_supported_ = true; |
| 101 | } |
| 102 | |
| 103 | // Enable the socket option that allows the local address to be |
| 104 | // returned if the socket is bound to more than on address. |
| 105 | int get_local_ip = 1; |
| 106 | rc = setsockopt(fd_, IPPROTO_IP, IP_PKTINFO, |
| 107 | &get_local_ip, sizeof(get_local_ip)); |
| 108 | if (rc == 0 && address_family == AF_INET6) { |
| 109 | rc = setsockopt(fd_, IPPROTO_IPV6, IPV6_RECVPKTINFO, |
| 110 | &get_local_ip, sizeof(get_local_ip)); |
| 111 | } |
| 112 | if (rc != 0) { |
| 113 | LOG(ERROR) << "Failed to set required socket options"; |
| 114 | return false; |
| 115 | } |
| 116 | |
| 117 | sockaddr_storage raw_addr; |
| 118 | socklen_t raw_addr_len = sizeof(raw_addr); |
| 119 | CHECK(address.ToSockAddr(reinterpret_cast<sockaddr*>(&raw_addr), |
| 120 | &raw_addr_len)); |
| 121 | rc = bind(fd_, |
| 122 | reinterpret_cast<const sockaddr*>(&raw_addr), |
| 123 | sizeof(raw_addr)); |
| 124 | if (rc < 0) { |
| 125 | LOG(ERROR) << "Bind failed: " << strerror(errno); |
| 126 | return false; |
| 127 | } |
| 128 | |
| 129 | LOG(INFO) << "Listening on " << address.ToString(); |
| 130 | if (port_ == 0) { |
| 131 | SockaddrStorage storage; |
| 132 | IPEndPoint server_address; |
| 133 | if (getsockname(fd_, storage.addr, &storage.addr_len) != 0 || |
| 134 | !server_address.FromSockAddr(storage.addr, storage.addr_len)) { |
| 135 | LOG(ERROR) << "Unable to get self address. Error: " << strerror(errno); |
| 136 | return false; |
| 137 | } |
| 138 | port_ = server_address.port(); |
| 139 | LOG(INFO) << "Kernel assigned port is " << port_; |
| 140 | } |
| 141 | |
| 142 | epoll_server_.RegisterFD(fd_, this, kEpollFlags); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 143 | dispatcher_.reset(new QuicDispatcher(config_, crypto_config_, fd_, |
| 144 | &epoll_server_)); |
| 145 | |
| 146 | return true; |
| 147 | } |
| 148 | |
| 149 | void QuicServer::WaitForEvents() { |
| 150 | epoll_server_.WaitForEventsAndExecuteCallbacks(); |
| 151 | } |
| 152 | |
| 153 | void QuicServer::Shutdown() { |
| 154 | // Before we shut down the epoll server, give all active sessions a chance to |
| 155 | // notify clients that they're closing. |
| 156 | dispatcher_->Shutdown(); |
| 157 | } |
| 158 | |
| 159 | void QuicServer::OnEvent(int fd, EpollEvent* event) { |
| 160 | DCHECK_EQ(fd, fd_); |
| 161 | event->out_ready_mask = 0; |
| 162 | |
| 163 | if (event->in_events & EPOLLIN) { |
| 164 | LOG(ERROR) << "EPOLLIN"; |
| 165 | bool read = true; |
| 166 | while (read) { |
| 167 | read = ReadAndDispatchSinglePacket( |
| 168 | fd_, port_, dispatcher_.get(), |
| 169 | overflow_supported_ ? &packets_dropped_ : NULL); |
| 170 | } |
| 171 | } |
| 172 | if (event->in_events & EPOLLOUT) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 173 | bool can_write_more = dispatcher_->OnCanWrite(); |
| 174 | if (can_write_more) { |
| 175 | event->out_ready_mask |= EPOLLOUT; |
| 176 | } |
| 177 | } |
| 178 | if (event->in_events & EPOLLERR) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 179 | } |
| 180 | } |
| 181 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 182 | /* static */ |
| 183 | void QuicServer::MaybeDispatchPacket(QuicDispatcher* dispatcher, |
| 184 | const QuicEncryptedPacket& packet, |
| 185 | const IPEndPoint& server_address, |
| 186 | const IPEndPoint& client_address) { |
| 187 | QuicGuid guid; |
| 188 | if (!QuicFramer::ReadGuidFromPacket(packet, &guid)) { |
| 189 | return; |
| 190 | } |
| 191 | |
| 192 | dispatcher->ProcessPacket(server_address, client_address, guid, packet); |
| 193 | } |
| 194 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 195 | bool QuicServer::ReadAndDispatchSinglePacket(int fd, |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 196 | int port, |
| 197 | QuicDispatcher* dispatcher, |
| 198 | int* packets_dropped) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 199 | // Allocate some extra space so we can send an error if the client goes over |
| 200 | // the limit. |
| 201 | char buf[2 * kMaxPacketSize]; |
| 202 | |
| 203 | IPEndPoint client_address; |
| 204 | IPAddressNumber server_ip; |
| 205 | int bytes_read = |
| 206 | QuicSocketUtils::ReadPacket(fd, buf, arraysize(buf), |
| 207 | packets_dropped, |
| 208 | &server_ip, &client_address); |
| 209 | |
| 210 | if (bytes_read < 0) { |
| 211 | return false; // We failed to read. |
| 212 | } |
| 213 | |
| 214 | QuicEncryptedPacket packet(buf, bytes_read, false); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 215 | |
| 216 | IPEndPoint server_address(server_ip, port); |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 217 | MaybeDispatchPacket(dispatcher, packet, server_address, client_address); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 218 | |
| 219 | return true; |
| 220 | } |
| 221 | |
| 222 | } // namespace tools |
| 223 | } // namespace net |