Implements RTP header dumping.

content/browser/renderer_host/p2p/socket_host.h

Index: content/browser/renderer_host/p2p/socket_host.h
diff --git a/content/browser/renderer_host/p2p/socket_host.h b/content/browser/renderer_host/p2p/socket_host.h
index a4c82f3ecf79de557a9466361bb24276189362d5..bfcbbd229f1b0cff0f1810e15501554899956ff0 100644
--- a/content/browser/renderer_host/p2p/socket_host.h
+++ b/content/browser/renderer_host/p2p/socket_host.h
@@ -5,8 +5,10 @@
 #ifndef CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_H_
 
+#include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "content/common/p2p_socket_type.h"
+#include "content/public/browser/render_process_host.h"
 #include "net/base/ip_endpoint.h"
 #include "net/udp/datagram_socket.h"
 
@@ -37,7 +39,8 @@ CONTENT_EXPORT bool ApplyPacketOptions(char* data, int length,
 
 // Helper method which finds RTP ofset and length if the packet is encapsulated
 // in a TURN Channel Message or TURN Send Indication message.
-CONTENT_EXPORT bool GetRtpPacketStartPositionAndLength(char* data, int length,
+CONTENT_EXPORT bool GetRtpPacketStartPositionAndLength(const char* data,
+                                                       int length,
                                                        int* rtp_start_pos,
                                                        int* rtp_packet_length);
 // Helper method which updates absoulute send time extension if present.
@@ -53,7 +56,8 @@ class CONTENT_EXPORT P2PSocketHost {
   static const int kStunHeaderSize = 20;
   // Creates P2PSocketHost of the specific type.
   static P2PSocketHost* Create(IPC::Sender* message_sender,
-                               int id, P2PSocketType type,
+                               int socket_id,
+                               P2PSocketType type,
                                net::URLRequestContextGetter* url_context,
                                P2PMessageThrottler* throttler);
 
@@ -74,6 +78,12 @@ class CONTENT_EXPORT P2PSocketHost {
 
   virtual bool SetOption(P2PSocketOption option, int value) = 0;
 
+  void StartRtpDump(
+      bool incoming,
+      bool outgoing,
+      const RenderProcessHost::WebRtcRtpPacketCallback& packet_callback);
+  void StopRtpDump(bool incoming, bool outgoing);
+
  protected:
   friend class P2PSocketHostTcpTestBase;
 
@@ -111,7 +121,7 @@ class CONTENT_EXPORT P2PSocketHost {
     STATE_ERROR,
   };
 
-  P2PSocketHost(IPC::Sender* message_sender, int id);
+  P2PSocketHost(IPC::Sender* message_sender, int socket_id);
 
   // Verifies that the packet |data| has a valid STUN header. In case
   // of success stores type of the message in |type|.
@@ -119,9 +129,23 @@ class CONTENT_EXPORT P2PSocketHost {
                                 StunMessageType* type);
   static bool IsRequestOrResponse(StunMessageType type);
 
+  // Calls |packet_dump_callback_| to record the RTP header.
+  void DumpRtpPacket(const char* packet, size_t length, bool incoming);
+
+  // A helper to dump the packet on the IO thread.
+  void DumpRtpPacketOnIOThread(scoped_ptr<uint8[]> packet_header,
+                               size_t header_length,
+                               size_t packet_length,
+                               bool incoming);
+
   IPC::Sender* message_sender_;
   int id_;
   State state_;
+  bool dump_incoming_rtp_packet_;
+  bool dump_outgoing_rtp_packet_;
+  RenderProcessHost::WebRtcRtpPacketCallback packet_dump_callback_;
+
+  base::WeakPtrFactory<P2PSocketHost> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PSocketHost);
 };