Add remotePort getter to Socket.

runtime/bin/socket_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <mswsock.h>
 
 #include "bin/builtin.h"
 #include "bin/eventhandler.h"
@@ skipping 36 matching lines @@
   if (getsockname(socket_handle->socket(),
                   reinterpret_cast<struct sockaddr *>(&socket_address),
                   &size)) {
     fprintf(stderr, "Error getsockname: %s\n", strerror(errno));
     return 0;
   }
   return ntohs(socket_address.sin_port);
 }
 
 
+intptr_t Socket::GetRemotePort(intptr_t fd) {
+  ASSERT(reinterpret_cast<Handle*>(fd)->is_socket());
+  SocketHandle* socket_handle = reinterpret_cast<SocketHandle*>(fd);
+  struct sockaddr_in socket_address;
+  socklen_t size = sizeof(socket_address);
+  if (getpeername(socket_handle->socket(),
+                  reinterpret_cast<struct sockaddr *>(&socket_address),
+                  &size)) {
+    fprintf(stderr, "Error getpeername: %s\n", strerror(errno));
+    return 0;
+  }
+  return ntohs(socket_address.sin_port);
+}
+
+
 intptr_t Socket::CreateConnect(const char* host, const intptr_t port) {
   SOCKET s = socket(AF_INET, SOCK_STREAM, 0);
   if (s == INVALID_SOCKET) {
     return -1;
   }
 
   linger l;
   l.l_onoff = 1;
   l.l_linger = 10;
   int status = setsockopt(s,
@@ skipping 153 matching lines @@
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);
     SetLastError(rc);
     return -1;
   }
 
   ListenSocket* listen_socket = new ListenSocket(s);
   return reinterpret_cast<intptr_t>(listen_socket);
 }