Allow receiving a packet on a TURN port from an unknown address.

webrtc/p2p/base/turnport.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.
  */
 
@@ skipping 813 matching lines @@
   }
 
   const StunByteStringAttribute* data_attr =
       msg.GetByteString(STUN_ATTR_DATA);
   if (!data_attr) {
     LOG_J(LS_WARNING, this) << "Missing STUN_ATTR_DATA attribute in "
                             << "data indication.";
     return;
   }
 
-  // Verify that the data came from somewhere we think we have a permission for.
+  // Log a warning if the data didn't come from an address that we think we have
+  // a permission for.
   rtc::SocketAddress ext_addr(addr_attr->GetAddress());
   if (!HasPermission(ext_addr.ipaddr())) {
-    LOG_J(LS_WARNING, this) << "Received TURN data indication with invalid "
-                            << "peer address, addr="
-                            << ext_addr.ToSensitiveString();
-    return;
+    LOG_J(LS_WARNING, this)
+        << "Received TURN data indication with unknown "
+        << "peer address, addr=" << ext_addr.ToSensitiveString();
   }
 
   DispatchPacket(data_attr->bytes(), data_attr->length(), ext_addr,
                  PROTO_UDP, packet_time);
 }
 
 void TurnPort::HandleChannelData(int channel_id, const char* data,
                                  size_t size,
                                  const rtc::PacketTime& packet_time) {
   // Read the message, and process according to RFC5766, Section 11.6.
@@ skipping 682 matching lines @@
   } else {
     state_ = STATE_UNBOUND;
     port_->FailAndPruneConnection(ext_addr_);
   }
 }
 void TurnEntry::OnChannelBindTimeout() {
   state_ = STATE_UNBOUND;
   port_->FailAndPruneConnection(ext_addr_);
 }
 }  // namespace cricket