Added broadcasting feature to UDP server sockets.

net/udp/udp_socket_libevent.h

Index: net/udp/udp_socket_libevent.h
diff --git a/net/udp/udp_socket_libevent.h b/net/udp/udp_socket_libevent.h
index 3242e18f12cc112048e5db89b2fcec1fee389669..076ebe153dd282137a7b50407e9fe400aba5b3d4 100644
--- a/net/udp/udp_socket_libevent.h
+++ b/net/udp/udp_socket_libevent.h
@@ -103,9 +103,18 @@ class NET_EXPORT UDPSocketLibevent : public base::NonThreadSafe {
 
   const BoundNetLog& NetLog() const { return net_log_; }
 
+  void AllowAddressReuse();
+
+  void AllowBroadcast();

[wtc, 2012/07/12 23:49:47]

NOTE: all the changes I suggest for this file also apply to
net/udp/udp_socket_win.h .

Document these two methods.

They must be called before Bind.  (This class doesn't have the
Listen method.)

[ygorshenin1, 2012/07/16 10:29:44]

Done.

+
  private:
   static const int kInvalidSocket = -1;
 
+  enum SocketOptions {
+    SOCKET_OPTION_REUSE_ADDRESS = 1 << 0,
+    SOCKET_OPTION_BROADCAST     = 1 << 1
+  };
+
   class ReadWatcher : public MessageLoopForIO::Watcher {
    public:
     explicit ReadWatcher(UDPSocketLibevent* socket) : socket_(socket) {}
@@ -172,10 +181,12 @@ class NET_EXPORT UDPSocketLibevent : public base::NonThreadSafe {
   int InternalRecvFrom(IOBuffer* buf, int buf_len, IPEndPoint* address);
   int InternalSendTo(IOBuffer* buf, int buf_len, const IPEndPoint* address);
 
+  int SetSocketOptions();
   int DoBind(const IPEndPoint& address);
   int RandomBind(const IPEndPoint& address);
 
   int socket_;
+  int socket_options_;

[wtc, 2012/07/12 23:49:47]

Nit: document these members.

[ygorshenin1, 2012/07/16 10:29:44]

Done.

 
   // How to do source port binding, used only when UDPSocket is part of
   // UDPClientSocket, since UDPServerSocket provides Bind.