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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/socket/tcp_server_socket_libevent.h" | |
| 6 | |
| 7 #include <errno.h> | |
| 8 #include <fcntl.h> | |
| 9 #include <netdb.h> | |
| 10 #include <sys/socket.h> | |
| 11 | |
| 12 #include "build/build_config.h" | |
| 13 | |
| 14 #if defined(OS_POSIX) | |
| 15 #include <netinet/in.h> | |
| 16 #endif | |
| 17 | |
| 18 #include "base/posix/eintr_wrapper.h" | |
| 19 #include "net/base/ip_endpoint.h" | |
| 20 #include "net/base/net_errors.h" | |
| 21 #include "net/base/net_util.h" | |
| 22 #include "net/socket/socket_net_log_params.h" | |
| 23 #include "net/socket/tcp_client_socket.h" | |
| 24 | |
| 25 namespace net { | |
| 26 | |
| 27 namespace { | |
| 28 | |
| 29 const int kInvalidSocket = -1; | |
| 30 | |
| 31 } // namespace | |
| 32 | |
| 33 TCPServerSocketLibevent::TCPServerSocketLibevent( | |
| 34 net::NetLog* net_log, | |
| 35 const net::NetLog::Source& source) | |
| 36 : socket_(kInvalidSocket), | |
| 37 accept_socket_(NULL), | |
| 38 net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_SOCKET)) { | |
| 39 net_log_.BeginEvent(NetLog::TYPE_SOCKET_ALIVE, | |
| 40 source.ToEventParametersCallback()); | |
| 41 } | |
| 42 | |
| 43 TCPServerSocketLibevent::~TCPServerSocketLibevent() { | |
| 44 if (socket_ != kInvalidSocket) | |
| 45 Close(); | |
| 46 net_log_.EndEvent(NetLog::TYPE_SOCKET_ALIVE); | |
| 47 } | |
| 48 | |
| 49 int TCPServerSocketLibevent::Listen(const IPEndPoint& address, int backlog) { | |
| 50 DCHECK(CalledOnValidThread()); | |
| 51 DCHECK_GT(backlog, 0); | |
| 52 DCHECK_EQ(socket_, kInvalidSocket); | |
| 53 | |
| 54 socket_ = socket(address.GetSockAddrFamily(), SOCK_STREAM, IPPROTO_TCP); | |
| 55 if (socket_ < 0) { | |
| 56 PLOG(ERROR) << "socket() returned an error"; | |
| 57 return MapSystemError(errno); | |
| 58 } | |
| 59 | |
| 60 if (SetNonBlocking(socket_)) { | |
| 61 int result = MapSystemError(errno); | |
| 62 Close(); | |
| 63 return result; | |
| 64 } | |
| 65 | |
| 66 int result = SetSocketOptions(); | |
| 67 if (result != OK) { | |
| 68 Close(); | |
| 69 return result; | |
| 70 } | |
| 71 | |
| 72 SockaddrStorage storage; | |
| 73 if (!address.ToSockAddr(storage.addr, &storage.addr_len)) { | |
| 74 Close(); | |
| 75 return ERR_ADDRESS_INVALID; | |
| 76 } | |
| 77 | |
| 78 result = bind(socket_, storage.addr, storage.addr_len); | |
| 79 if (result < 0) { | |
| 80 PLOG(ERROR) << "bind() returned an error"; | |
| 81 result = MapSystemError(errno); | |
| 82 Close(); | |
| 83 return result; | |
| 84 } | |
| 85 | |
| 86 result = listen(socket_, backlog); | |
| 87 if (result < 0) { | |
| 88 PLOG(ERROR) << "listen() returned an error"; | |
| 89 result = MapSystemError(errno); | |
| 90 Close(); | |
| 91 return result; | |
| 92 } | |
| 93 | |
| 94 return OK; | |
| 95 } | |
| 96 | |
| 97 int TCPServerSocketLibevent::GetLocalAddress(IPEndPoint* address) const { | |
| 98 DCHECK(CalledOnValidThread()); | |
| 99 DCHECK(address); | |
| 100 | |
| 101 SockaddrStorage storage; | |
| 102 if (getsockname(socket_, storage.addr, &storage.addr_len) < 0) | |
| 103 return MapSystemError(errno); | |
| 104 if (!address->FromSockAddr(storage.addr, storage.addr_len)) | |
| 105 return ERR_FAILED; | |
| 106 | |
| 107 return OK; | |
| 108 } | |
| 109 | |
| 110 int TCPServerSocketLibevent::Accept( | |
| 111 scoped_ptr<StreamSocket>* socket, const CompletionCallback& callback) { | |
| 112 DCHECK(CalledOnValidThread()); | |
| 113 DCHECK(socket); | |
| 114 DCHECK(!callback.is_null()); | |
| 115 DCHECK(accept_callback_.is_null()); | |
| 116 | |
| 117 net_log_.BeginEvent(NetLog::TYPE_TCP_ACCEPT); | |
| 118 | |
| 119 int result = AcceptInternal(socket); | |
| 120 | |
| 121 if (result == ERR_IO_PENDING) { | |
| 122 if (!base::MessageLoopForIO::current()->WatchFileDescriptor( | |
| 123 socket_, true, base::MessageLoopForIO::WATCH_READ, | |
| 124 &accept_socket_watcher_, this)) { | |
| 125 PLOG(ERROR) << "WatchFileDescriptor failed on read"; | |
| 126 return MapSystemError(errno); | |
| 127 } | |
| 128 | |
| 129 accept_socket_ = socket; | |
| 130 accept_callback_ = callback; | |
| 131 } | |
| 132 | |
| 133 return result; | |
| 134 } | |
| 135 | |
| 136 int TCPServerSocketLibevent::SetSocketOptions() { | |
| 137 // SO_REUSEADDR is useful for server sockets to bind to a recently unbound | |
| 138 // port. When a socket is closed, the end point changes its state to TIME_WAIT | |
| 139 // and wait for 2 MSL (maximum segment lifetime) to ensure the remote peer | |
| 140 // acknowledges its closure. For server sockets, it is usually safe to | |
| 141 // bind to a TIME_WAIT end point immediately, which is a widely adopted | |
| 142 // behavior. | |
| 143 // | |
| 144 // Note that on *nix, SO_REUSEADDR does not enable the TCP socket to bind to | |
| 145 // an end point that is already bound by another socket. To do that one must | |
| 146 // set SO_REUSEPORT instead. This option is not provided on Linux prior | |
| 147 // to 3.9. | |
| 148 // | |
| 149 // SO_REUSEPORT is provided in MacOS X and iOS. | |
| 150 int true_value = 1; | |
| 151 int rv = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, &true_value, | |
| 152 sizeof(true_value)); | |
| 153 if (rv < 0) | |
| 154 return MapSystemError(errno); | |
| 155 return OK; | |
| 156 } | |
| 157 | |
| 158 int TCPServerSocketLibevent::AcceptInternal( | |
| 159 scoped_ptr<StreamSocket>* socket) { | |
| 160 SockaddrStorage storage; | |
| 161 int new_socket = HANDLE_EINTR(accept(socket_, | |
| 162 storage.addr, | |
| 163 &storage.addr_len)); | |
| 164 if (new_socket < 0) { | |
| 165 int net_error = MapSystemError(errno); | |
| 166 if (net_error != ERR_IO_PENDING) | |
| 167 net_log_.EndEventWithNetErrorCode(NetLog::TYPE_TCP_ACCEPT, net_error); | |
| 168 return net_error; | |
| 169 } | |
| 170 | |
| 171 IPEndPoint address; | |
| 172 if (!address.FromSockAddr(storage.addr, storage.addr_len)) { | |
| 173 NOTREACHED(); | |
| 174 if (HANDLE_EINTR(close(new_socket)) < 0) | |
| 175 PLOG(ERROR) << "close"; | |
| 176 net_log_.EndEventWithNetErrorCode(NetLog::TYPE_TCP_ACCEPT, ERR_FAILED); | |
| 177 return ERR_FAILED; | |
| 178 } | |
| 179 scoped_ptr<TCPClientSocket> tcp_socket(new TCPClientSocket( | |
| 180 AddressList(address), | |
| 181 net_log_.net_log(), net_log_.source())); | |
| 182 int adopt_result = tcp_socket->AdoptSocket(new_socket); | |
| 183 if (adopt_result != OK) { | |
| 184 if (HANDLE_EINTR(close(new_socket)) < 0) | |
| 185 PLOG(ERROR) << "close"; | |
| 186 net_log_.EndEventWithNetErrorCode(NetLog::TYPE_TCP_ACCEPT, adopt_result); | |
| 187 return adopt_result; | |
| 188 } | |
| 189 socket->reset(tcp_socket.release()); | |
| 190 net_log_.EndEvent(NetLog::TYPE_TCP_ACCEPT, | |
| 191 CreateNetLogIPEndPointCallback(&address)); | |
| 192 return OK; | |
| 193 } | |
| 194 | |
| 195 void TCPServerSocketLibevent::Close() { | |
| 196 if (socket_ != kInvalidSocket) { | |
| 197 bool ok = accept_socket_watcher_.StopWatchingFileDescriptor(); | |
| 198 DCHECK(ok); | |
| 199 if (HANDLE_EINTR(close(socket_)) < 0) | |
| 200 PLOG(ERROR) << "close"; | |
| 201 socket_ = kInvalidSocket; | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 void TCPServerSocketLibevent::OnFileCanReadWithoutBlocking(int fd) { | |
| 206 DCHECK(CalledOnValidThread()); | |
| 207 | |
| 208 int result = AcceptInternal(accept_socket_); | |
| 209 if (result != ERR_IO_PENDING) { | |
| 210 accept_socket_ = NULL; | |
| 211 bool ok = accept_socket_watcher_.StopWatchingFileDescriptor(); | |
| 212 DCHECK(ok); | |
| 213 CompletionCallback callback = accept_callback_; | |
| 214 accept_callback_.Reset(); | |
| 215 callback.Run(result); | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 void TCPServerSocketLibevent::OnFileCanWriteWithoutBlocking(int fd) { | |
| 220 NOTREACHED(); | |
| 221 } | |
| 222 | |
| 223 } // namespace net | |
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Chromium Code Reviews
Issue 22861033:
Move server socket functionality from TCPServerSocket into TCPSocket. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src