Multicast socket API

net/udp/udp_socket_unittest.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_client_socket.h"
 #include "net/udp/udp_server_socket.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
@@ skipping 508 matching lines @@
   TestCompletionCallback callback;
   IPEndPoint from;
   rv = server.RecvFrom(buffer_, kMaxRead, &from, callback.callback());
   EXPECT_EQ(rv, ERR_IO_PENDING);
 
   server.Close();
 
   EXPECT_FALSE(callback.have_result());
 }
 
+#if defined(OS_ANDROID)
+// Some Android devices does not support multicast socket.

[wtc, 2013/04/22 19:19:53]

Typo: does not => do not
      socket => sockets

[Bei Zhang, 2013/04/23 17:26:53]

Done.

+// Ones supporting multicast need WifiManager.MulitcastLock to enable it.

[wtc, 2013/04/22 19:19:53]

Typo: Ones => The ones

[Bei Zhang, 2013/04/23 17:26:53]

Done.

+// http://goo.gl/jjAk9
+TEST_F(UDPSocketTest, DISABLED_JoinMulticastGroup) {
+#else
+TEST_F(UDPSocketTest, JoinMulticastGroup) {
+#endif  // defined(OS_ANDROID)

[wtc, 2013/04/22 19:19:53]

This is usually done as follows:

#if defined(OS_ANDROID)
// Comments ...
#define MAYBE_JoinMulticastGroup DISABLED_JoinMulticastGroup
#else
#define MAYBE_JoinMulticastGroup JoinMulticastGroup
#endif

TEST_F(UDPSocketTest, MAYBE_JoinMulticastGroup) {

[Bei Zhang, 2013/04/23 17:26:53]

Done.

+  const int kPort = 9999;
+  const char* const kGroup = "237.132.100.17";
+
+  IPEndPoint bind_address;
+  CreateUDPAddress("0.0.0.0", kPort, &bind_address);
+  IPAddressNumber group_ip;
+  EXPECT_TRUE(ParseIPLiteralToNumber(kGroup, &group_ip));
+
+  UDPSocket socket(DatagramSocket::DEFAULT_BIND,
+                   RandIntCallback(),
+                   NULL,
+                   NetLog::Source());
+  EXPECT_EQ(OK, socket.Bind(bind_address));
+  EXPECT_EQ(OK, socket.JoinGroup(group_ip));
+  // Joining group multiple times.
+  EXPECT_NE(OK, socket.JoinGroup(group_ip));

[wtc, 2013/04/22 19:19:53]

Why can't we check for a specific error code here and on
lines 555 and 574?

This is probably not a big deal. I'm just curious.

[Bei Zhang, 2013/04/23 17:26:53]

The setsockopt function creates different errno on different OSes. Do you think
we should map it manually to get a consistent error code?

On 2013/04/22 19:19:53, wtc wrote:

[wtc, 2013/04/23 18:01:07]

It is not necessary to get a consistent error code across
different OSes, but if it is convenient to do so, we should
do that.

Do you remember what the error codes are? I am curious to
know.

+  EXPECT_EQ(OK, socket.LeaveGroup(group_ip));
+  // Leaving group multiple times.
+  EXPECT_NE(OK, socket.LeaveGroup(group_ip));
+
+  socket.Close();
+}
+
+TEST_F(UDPSocketTest, MulticastOptions) {
+  const int kPort = 9999;
+  IPEndPoint bind_address;
+  CreateUDPAddress("0.0.0.0", kPort, &bind_address);
+
+  UDPSocket socket(DatagramSocket::DEFAULT_BIND,
+                   RandIntCallback(),
+                   NULL,
+                   NetLog::Source());
+  // Before binding.
+  EXPECT_EQ(OK, socket.SetMulticastLoopbackMode(false));
+  EXPECT_EQ(OK, socket.SetMulticastLoopbackMode(true));
+  EXPECT_EQ(OK, socket.SetMulticastTimeToLive(0));
+  EXPECT_EQ(OK, socket.SetMulticastTimeToLive(3));
+  EXPECT_NE(OK, socket.SetMulticastTimeToLive(-1));
+
+  EXPECT_EQ(OK, socket.Bind(bind_address));
+
+  socket.Close();
+}
+
 }  // namespace
 
 }  // namespace net