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| 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/base/stream_listen_socket.h" | |
| 6 | |
| 7 #if defined(OS_WIN) | |
| 8 // winsock2.h must be included first in order to ensure it is included before | |
| 9 // windows.h. | |
| 10 #include <winsock2.h> | |
| 11 #elif defined(OS_POSIX) | |
| 12 #include <errno.h> | |
| 13 #include <sys/types.h> | |
| 14 #include <sys/socket.h> | |
| 15 #include <netinet/in.h> | |
| 16 #include <arpa/inet.h> | |
| 17 #include "net/base/net_errors.h" | |
| 18 #endif | |
| 19 | |
| 20 #include "base/logging.h" | |
| 21 #include "base/memory/ref_counted.h" | |
| 22 #include "base/memory/scoped_ptr.h" | |
| 23 #include "base/posix/eintr_wrapper.h" | |
| 24 #include "base/sys_byteorder.h" | |
| 25 #include "base/threading/platform_thread.h" | |
| 26 #include "build/build_config.h" | |
| 27 #include "net/base/ip_endpoint.h" | |
| 28 #include "net/base/net_errors.h" | |
| 29 #include "net/base/net_util.h" | |
| 30 | |
| 31 using std::string; | |
| 32 | |
| 33 #if defined(OS_WIN) | |
| 34 typedef int socklen_t; | |
| 35 #endif // defined(OS_WIN) | |
| 36 | |
| 37 namespace net { | |
| 38 | |
| 39 namespace { | |
| 40 | |
| 41 const int kReadBufSize = 4096; | |
| 42 | |
| 43 } // namespace | |
| 44 | |
| 45 #if defined(OS_WIN) | |
| 46 const SocketDescriptor StreamListenSocket::kInvalidSocket = INVALID_SOCKET; | |
| 47 const int StreamListenSocket::kSocketError = SOCKET_ERROR; | |
| 48 #elif defined(OS_POSIX) | |
| 49 const SocketDescriptor StreamListenSocket::kInvalidSocket = -1; | |
| 50 const int StreamListenSocket::kSocketError = -1; | |
| 51 #endif | |
| 52 | |
| 53 StreamListenSocket::StreamListenSocket(SocketDescriptor s, | |
| 54 StreamListenSocket::Delegate* del) | |
| 55 : socket_delegate_(del), | |
| 56 socket_(s), | |
| 57 reads_paused_(false), | |
| 58 has_pending_reads_(false) { | |
| 59 #if defined(OS_WIN) | |
| 60 socket_event_ = WSACreateEvent(); | |
| 61 // TODO(ibrar): error handling in case of socket_event_ == WSA_INVALID_EVENT. | |
| 62 WatchSocket(NOT_WAITING); | |
| 63 #elif defined(OS_POSIX) | |
| 64 wait_state_ = NOT_WAITING; | |
| 65 #endif | |
| 66 } | |
| 67 | |
| 68 StreamListenSocket::~StreamListenSocket() { | |
| 69 #if defined(OS_WIN) | |
| 70 if (socket_event_) { | |
| 71 WSACloseEvent(socket_event_); | |
| 72 socket_event_ = WSA_INVALID_EVENT; | |
| 73 } | |
| 74 #endif | |
| 75 CloseSocket(socket_); | |
| 76 } | |
| 77 | |
| 78 void StreamListenSocket::Send(const char* bytes, int len, | |
| 79 bool append_linefeed) { | |
| 80 SendInternal(bytes, len); | |
| 81 if (append_linefeed) | |
| 82 SendInternal("\r\n", 2); | |
| 83 } | |
| 84 | |
| 85 void StreamListenSocket::Send(const string& str, bool append_linefeed) { | |
| 86 Send(str.data(), static_cast<int>(str.length()), append_linefeed); | |
| 87 } | |
| 88 | |
| 89 int StreamListenSocket::GetLocalAddress(IPEndPoint* address) { | |
| 90 SockaddrStorage storage; | |
| 91 if (getsockname(socket_, storage.addr, &storage.addr_len)) { | |
| 92 #if defined(OS_WIN) | |
| 93 int err = WSAGetLastError(); | |
| 94 #else | |
| 95 int err = errno; | |
| 96 #endif | |
| 97 return MapSystemError(err); | |
| 98 } | |
| 99 if (!address->FromSockAddr(storage.addr, storage.addr_len)) | |
| 100 return ERR_FAILED; | |
| 101 return OK; | |
| 102 } | |
| 103 | |
| 104 SocketDescriptor StreamListenSocket::AcceptSocket() { | |
| 105 SocketDescriptor conn = HANDLE_EINTR(accept(socket_, NULL, NULL)); | |
| 106 if (conn == kInvalidSocket) | |
| 107 LOG(ERROR) << "Error accepting connection."; | |
| 108 else | |
| 109 SetNonBlocking(conn); | |
| 110 return conn; | |
| 111 } | |
| 112 | |
| 113 void StreamListenSocket::SendInternal(const char* bytes, int len) { | |
| 114 char* send_buf = const_cast<char *>(bytes); | |
| 115 int len_left = len; | |
| 116 while (true) { | |
| 117 int sent = HANDLE_EINTR(send(socket_, send_buf, len_left, 0)); | |
| 118 if (sent == len_left) { // A shortcut to avoid extraneous checks. | |
| 119 break; | |
| 120 } | |
| 121 if (sent == kSocketError) { | |
| 122 #if defined(OS_WIN) | |
| 123 if (WSAGetLastError() != WSAEWOULDBLOCK) { | |
| 124 LOG(ERROR) << "send failed: WSAGetLastError()==" << WSAGetLastError(); | |
| 125 #elif defined(OS_POSIX) | |
| 126 if (errno != EWOULDBLOCK && errno != EAGAIN) { | |
| 127 LOG(ERROR) << "send failed: errno==" << errno; | |
| 128 #endif | |
| 129 break; | |
| 130 } | |
| 131 // Otherwise we would block, and now we have to wait for a retry. | |
| 132 // Fall through to PlatformThread::YieldCurrentThread() | |
| 133 } else { | |
| 134 // sent != len_left according to the shortcut above. | |
| 135 // Shift the buffer start and send the remainder after a short while. | |
| 136 send_buf += sent; | |
| 137 len_left -= sent; | |
| 138 } | |
| 139 base::PlatformThread::YieldCurrentThread(); | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 void StreamListenSocket::Listen() { | |
| 144 int backlog = 10; // TODO(erikkay): maybe don't allow any backlog? | |
| 145 if (listen(socket_, backlog) == -1) { | |
| 146 // TODO(erikkay): error handling. | |
| 147 LOG(ERROR) << "Could not listen on socket."; | |
| 148 return; | |
| 149 } | |
| 150 #if defined(OS_POSIX) | |
| 151 WatchSocket(WAITING_ACCEPT); | |
| 152 #endif | |
| 153 } | |
| 154 | |
| 155 void StreamListenSocket::Read() { | |
| 156 char buf[kReadBufSize + 1]; // +1 for null termination. | |
| 157 int len; | |
| 158 do { | |
| 159 len = HANDLE_EINTR(recv(socket_, buf, kReadBufSize, 0)); | |
| 160 if (len == kSocketError) { | |
| 161 #if defined(OS_WIN) | |
| 162 int err = WSAGetLastError(); | |
| 163 if (err == WSAEWOULDBLOCK) { | |
| 164 #elif defined(OS_POSIX) | |
| 165 if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
| 166 #endif | |
| 167 break; | |
| 168 } else { | |
| 169 // TODO(ibrar): some error handling required here. | |
| 170 break; | |
| 171 } | |
| 172 } else if (len == 0) { | |
| 173 // In Windows, Close() is called by OnObjectSignaled. In POSIX, we need | |
| 174 // to call it here. | |
| 175 #if defined(OS_POSIX) | |
| 176 Close(); | |
| 177 #endif | |
| 178 } else { | |
| 179 // TODO(ibrar): maybe change DidRead to take a length instead. | |
| 180 DCHECK_GT(len, 0); | |
| 181 DCHECK_LE(len, kReadBufSize); | |
| 182 buf[len] = 0; // Already create a buffer with +1 length. | |
| 183 socket_delegate_->DidRead(this, buf, len); | |
| 184 } | |
| 185 } while (len == kReadBufSize); | |
| 186 } | |
| 187 | |
| 188 void StreamListenSocket::Close() { | |
| 189 #if defined(OS_POSIX) | |
| 190 if (wait_state_ == NOT_WAITING) | |
| 191 return; | |
| 192 wait_state_ = NOT_WAITING; | |
| 193 #endif | |
| 194 UnwatchSocket(); | |
| 195 socket_delegate_->DidClose(this); | |
| 196 } | |
| 197 | |
| 198 void StreamListenSocket::CloseSocket(SocketDescriptor s) { | |
| 199 if (s && s != kInvalidSocket) { | |
| 200 UnwatchSocket(); | |
| 201 #if defined(OS_WIN) | |
| 202 closesocket(s); | |
| 203 #elif defined(OS_POSIX) | |
| 204 close(s); | |
| 205 #endif | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 void StreamListenSocket::WatchSocket(WaitState state) { | |
| 210 #if defined(OS_WIN) | |
| 211 WSAEventSelect(socket_, socket_event_, FD_ACCEPT | FD_CLOSE | FD_READ); | |
| 212 watcher_.StartWatching(socket_event_, this); | |
| 213 #elif defined(OS_POSIX) | |
| 214 // Implicitly calls StartWatchingFileDescriptor(). | |
| 215 MessageLoopForIO::current()->WatchFileDescriptor( | |
| 216 socket_, true, MessageLoopForIO::WATCH_READ, &watcher_, this); | |
| 217 wait_state_ = state; | |
| 218 #endif | |
| 219 } | |
| 220 | |
| 221 void StreamListenSocket::UnwatchSocket() { | |
| 222 #if defined(OS_WIN) | |
| 223 watcher_.StopWatching(); | |
| 224 #elif defined(OS_POSIX) | |
| 225 watcher_.StopWatchingFileDescriptor(); | |
| 226 #endif | |
| 227 } | |
| 228 | |
| 229 // TODO(ibrar): We can add these functions into OS dependent files. | |
| 230 #if defined(OS_WIN) | |
| 231 // MessageLoop watcher callback. | |
| 232 void StreamListenSocket::OnObjectSignaled(HANDLE object) { | |
| 233 WSANETWORKEVENTS ev; | |
| 234 if (kSocketError == WSAEnumNetworkEvents(socket_, socket_event_, &ev)) { | |
| 235 // TODO | |
| 236 return; | |
| 237 } | |
| 238 | |
| 239 // The object was reset by WSAEnumNetworkEvents. Watch for the next signal. | |
| 240 watcher_.StartWatching(object, this); | |
| 241 | |
| 242 if (ev.lNetworkEvents == 0) { | |
| 243 // Occasionally the event is set even though there is no new data. | |
| 244 // The net seems to think that this is ignorable. | |
| 245 return; | |
| 246 } | |
| 247 if (ev.lNetworkEvents & FD_ACCEPT) { | |
| 248 Accept(); | |
| 249 } | |
| 250 if (ev.lNetworkEvents & FD_READ) { | |
| 251 if (reads_paused_) { | |
| 252 has_pending_reads_ = true; | |
| 253 } else { | |
| 254 Read(); | |
| 255 } | |
| 256 } | |
| 257 if (ev.lNetworkEvents & FD_CLOSE) { | |
| 258 Close(); | |
| 259 } | |
| 260 } | |
| 261 #elif defined(OS_POSIX) | |
| 262 void StreamListenSocket::OnFileCanReadWithoutBlocking(int fd) { | |
| 263 switch (wait_state_) { | |
| 264 case WAITING_ACCEPT: | |
| 265 Accept(); | |
| 266 break; | |
| 267 case WAITING_READ: | |
| 268 if (reads_paused_) { | |
| 269 has_pending_reads_ = true; | |
| 270 } else { | |
| 271 Read(); | |
| 272 } | |
| 273 break; | |
| 274 default: | |
| 275 // Close() is called by Read() in the Linux case. | |
| 276 NOTREACHED(); | |
| 277 break; | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 void StreamListenSocket::OnFileCanWriteWithoutBlocking(int fd) { | |
| 282 // MessagePumpLibevent callback, we don't listen for write events | |
| 283 // so we shouldn't ever reach here. | |
| 284 NOTREACHED(); | |
| 285 } | |
| 286 | |
| 287 #endif | |
| 288 | |
| 289 void StreamListenSocket::PauseReads() { | |
| 290 DCHECK(!reads_paused_); | |
| 291 reads_paused_ = true; | |
| 292 } | |
| 293 | |
| 294 void StreamListenSocket::ResumeReads() { | |
| 295 DCHECK(reads_paused_); | |
| 296 reads_paused_ = false; | |
| 297 if (has_pending_reads_) { | |
| 298 has_pending_reads_ = false; | |
| 299 Read(); | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 } // namespace net | |
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Chromium Code Reviews
Issue 13812005:
net: move socket files from net/base to net/socket (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src