Fix AllocationSequence to handle the case when TurnPort stops using shared socket.

webrtc/p2p/base/turnport_unittest.cc

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #if defined(WEBRTC_POSIX)
@@ skipping 647 matching lines @@
   CreateTurnPort(kTurnUsername, kTurnPassword, kTurnUdpProtoAddr);
   turn_port_->PrepareAddress();
 
   // Verifies that the new port has the same address.
   EXPECT_EQ(first_addr, turn_port_->socket()->GetLocalAddress());
 
   EXPECT_TRUE_WAIT(turn_ready_, kTimeout);
 
   // Verifies that the new port has a different address now.
   EXPECT_NE(first_addr, turn_port_->socket()->GetLocalAddress());
+
+  // Verify that all packets received from the shared socket are ignored.
+  std::string test_packet = "Test packet";
+  EXPECT_FALSE(turn_port_->HandleIncomingPacket(
+      socket_.get(), test_packet.data(), test_packet.size(),
+      rtc::SocketAddress(kTurnUdpExtAddr.ipaddr(), 0),
+      rtc::CreatePacketTime(0)));
 }
 
 // Tests that a shared-socket-TurnPort creates its own socket after
 // STUN_ERROR_ALLOCATION_MISMATCH.
 TEST_F(TurnPortTest, TestSharedSocketAllocateMismatch) {
   // Do a normal allocation first.
   CreateSharedTurnPort(kTurnUsername, kTurnPassword, kTurnUdpProtoAddr);
   turn_port_->PrepareAddress();
   EXPECT_TRUE_WAIT(turn_ready_, kTimeout);
   rtc::SocketAddress first_addr(turn_port_->socket()->GetLocalAddress());
@@ skipping 371 matching lines @@
   turn_port_->PrepareAddress();
   ASSERT_TRUE_WAIT(turn_error_, kResolverTimeout);
   EXPECT_TRUE(turn_port_->Candidates().empty());
   turn_port_.reset();
   rtc::Thread::Current()->Post(this, MSG_TESTFINISH);
   // Waiting for above message to be processed.
   ASSERT_TRUE_WAIT(test_finish_, kTimeout);
   EXPECT_EQ(last_fd_count, GetFDCount());
 }
 #endif