Adding ERR_SOCKET_IS_CONNECTED.

net/udp/udp_socket_libevent.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/udp/udp_socket_libevent.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #include <sys/socket.h>
@@ skipping 504 matching lines @@
     }
     if (rv < 0)
       return MapSystemError(errno);
   }
   return OK;
 }
 
 int UDPSocketLibevent::DoBind(const IPEndPoint& address) {
   SockaddrStorage storage;
   if (!address.ToSockAddr(storage.addr, &storage.addr_len))
-    return ERR_UNEXPECTED;
+    return ERR_ADDRESS_INVALID;
   int rv = bind(socket_, storage.addr, storage.addr_len);
   return rv < 0 ? MapSystemError(errno) : rv;
 }
 
 int UDPSocketLibevent::RandomBind(const IPEndPoint& address) {
   DCHECK(bind_type_ == DatagramSocket::RANDOM_BIND && !rand_int_cb_.is_null());
 
   // Construct IPAddressNumber of appropriate size (IPv4 or IPv6) of 0s.
   IPAddressNumber ip(address.address().size());
 
@@ skipping 74 matching lines @@
     }
     default:
       NOTREACHED() << "Invalid address family";
       return ERR_ADDRESS_INVALID;
   }
 }
 
 int UDPSocketLibevent::SetMulticastTimeToLive(int time_to_live) {
   DCHECK(CalledOnValidThread());
   if (is_connected())
-    return ERR_UNEXPECTED;
+    return ERR_SOCKET_IS_CONNECTED;
 
   if (time_to_live < 0 || time_to_live > 255)
     return ERR_INVALID_ARGUMENT;
   multicast_time_to_live_ = time_to_live;
   return OK;
 }
 
 int UDPSocketLibevent::SetMulticastLoopbackMode(bool loopback) {
   DCHECK(CalledOnValidThread());
   if (is_connected())
-    return ERR_UNEXPECTED;
+    return ERR_SOCKET_IS_CONNECTED;
 
   if (loopback)
     socket_options_ |= SOCKET_OPTION_MULTICAST_LOOP;
   else
     socket_options_ &= ~SOCKET_OPTION_MULTICAST_LOOP;
   return OK;
 }
 }  // namespace net