net/socket/tcp_listen_socket.cc

   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_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 <arpa/inet.h>
  13 #include <errno.h>
  14 #include <netinet/in.h>
  15 #include <sys/socket.h>
  16 #include <sys/types.h>
  17 #include "net/base/net_errors.h"
  18 #endif
  19
  20 #include "base/logging.h"
  21 #include "base/sys_byteorder.h"
  22 #include "base/threading/platform_thread.h"
  23 #include "build/build_config.h"
  24 #include "net/base/net_util.h"
  25 #include "net/base/winsock_init.h"
  26 #include "net/socket/socket_descriptor.h"
  27
  28 using std::string;
  29
  30 namespace net {
  31
  32 // static
  33 scoped_ptr<TCPListenSocket> TCPListenSocket::CreateAndListen(
  34     const string& ip, int port, StreamListenSocket::Delegate* del) {
  35   SocketDescriptor s = CreateAndBind(ip, port);
  36   if (s == kInvalidSocket)
  37     return scoped_ptr<TCPListenSocket>();
  38   scoped_ptr<TCPListenSocket> sock(new TCPListenSocket(s, del));
  39   sock->Listen();
  40   return sock.Pass();
  41 }
  42
  43 TCPListenSocket::TCPListenSocket(SocketDescriptor s,
  44                                  StreamListenSocket::Delegate* del)
  45     : StreamListenSocket(s, del) {
  46 }
  47
  48 TCPListenSocket::~TCPListenSocket() {}
  49
  50 SocketDescriptor TCPListenSocket::CreateAndBind(const string& ip, int port) {
  51   SocketDescriptor s = CreatePlatformSocket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  52   if (s != kInvalidSocket) {
  53 #if defined(OS_POSIX)
  54     // Allow rapid reuse.
  55     static const int kOn = 1;
  56     setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &kOn, sizeof(kOn));
  57 #endif
  58     sockaddr_in addr;
  59     memset(&addr, 0, sizeof(addr));
  60     addr.sin_family = AF_INET;
  61     addr.sin_addr.s_addr = inet_addr(ip.c_str());
  62     addr.sin_port = base::HostToNet16(port);
  63     if (bind(s, reinterpret_cast<sockaddr*>(&addr), sizeof(addr))) {
  64 #if defined(OS_WIN)
  65       closesocket(s);
  66 #elif defined(OS_POSIX)
  67       close(s);
  68 #endif
  69       LOG(ERROR) << "Could not bind socket to " << ip << ":" << port;
  70       s = kInvalidSocket;
  71     }
  72   }
  73   return s;
  74 }
  75
  76 SocketDescriptor TCPListenSocket::CreateAndBindAnyPort(const string& ip,
  77                                                        int* port) {
  78   SocketDescriptor s = CreateAndBind(ip, 0);
  79   if (s == kInvalidSocket)
  80     return kInvalidSocket;
  81   sockaddr_in addr;
  82   socklen_t addr_size = sizeof(addr);
  83   bool failed = getsockname(s, reinterpret_cast<struct sockaddr*>(&addr),
  84                             &addr_size) != 0;
  85   if (addr_size != sizeof(addr))
  86     failed = true;
  87   if (failed) {
  88     LOG(ERROR) << "Could not determine bound port, getsockname() failed";
  89 #if defined(OS_WIN)
  90     closesocket(s);
  91 #elif defined(OS_POSIX)
  92     close(s);
  93 #endif
  94     return kInvalidSocket;
  95   }
  96   *port = base::NetToHost16(addr.sin_port);
  97   return s;
  98 }
  99
 100 void TCPListenSocket::Accept() {
 101   SocketDescriptor conn = AcceptSocket();
 102   if (conn == kInvalidSocket)
 103     return;
 104   scoped_ptr<TCPListenSocket> sock(
 105       new TCPListenSocket(conn, socket_delegate_));
 106   // It's up to the delegate to AddRef if it wants to keep it around.
 107 #if defined(OS_POSIX)
 108   sock->WatchSocket(WAITING_READ);
 109 #endif
 110   socket_delegate_->DidAccept(this, sock.PassAs<StreamListenSocket>());
 111 }
 112
 113 TCPListenSocketFactory::TCPListenSocketFactory(const string& ip, int port)
 114     : ip_(ip),
 115       port_(port) {
 116 }
 117
 118 TCPListenSocketFactory::~TCPListenSocketFactory() {}
 119
 120 scoped_ptr<StreamListenSocket> TCPListenSocketFactory::CreateAndListen(
 121     StreamListenSocket::Delegate* delegate) const {
 122   return TCPListenSocket::CreateAndListen(ip_, port_, delegate)
 123       .PassAs<StreamListenSocket>();
 124 }
 125
 126 }  // namespace net