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// Copyright (c) 2011 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.
#ifndef CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_H_
#define CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_H_
#include <stddef.h>
#include <stdint.h>
#include "base/macros.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"
namespace IPC {
class Sender;
}
namespace net {
class URLRequestContextGetter;
}
namespace rtc {
struct PacketOptions;
}
namespace content {
class P2PMessageThrottler;
namespace packet_processing_helpers {
// This method can handle only RTP packet, otherwise this method must not be
// called. It will try to do, 1. update absolute send time extension header
// if present with current time and 2. update HMAC in RTP packet.
// If abs_send_time is 0, ApplyPacketOption will get current time from system.
CONTENT_EXPORT bool ApplyPacketOptions(char* data,
size_t length,
const rtc::PacketOptions& options,
uint32_t abs_send_time);
// 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(
const char* data,
size_t length,
size_t* rtp_start_pos,
size_t* rtp_packet_length);
// Helper method which updates absoulute send time extension if present.
CONTENT_EXPORT bool UpdateRtpAbsSendTimeExtension(char* rtp,
size_t length,
int extension_id,
uint32_t abs_send_time);
} // packet_processing_helpers
// Base class for P2P sockets.
class CONTENT_EXPORT P2PSocketHost {
public:
static const int kStunHeaderSize = 20;
// Creates P2PSocketHost of the specific type.
static P2PSocketHost* Create(IPC::Sender* message_sender,
int socket_id,
P2PSocketType type,
net::URLRequestContextGetter* url_context,
P2PMessageThrottler* throttler);
virtual ~P2PSocketHost();
// Initalizes the socket. Returns false when initiazations fails.
virtual bool Init(const net::IPEndPoint& local_address,
const P2PHostAndIPEndPoint& remote_address) = 0;
// Sends |data| on the socket to |to|.
virtual void Send(const net::IPEndPoint& to,
const std::vector<char>& data,
const rtc::PacketOptions& options,
uint64_t packet_id) = 0;
virtual P2PSocketHost* AcceptIncomingTcpConnection(
const net::IPEndPoint& remote_address, int id) = 0;
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;
// This should match suffix IPProtocolType defined in histograms.xml.
enum ProtocolType { UDP = 0x1, TCP = 0x2 };
// TODO(mallinath) - Remove this below enum and use one defined in
// libjingle/souce/talk/p2p/base/stun.h
enum StunMessageType {
STUN_BINDING_REQUEST = 0x0001,
STUN_BINDING_RESPONSE = 0x0101,
STUN_BINDING_ERROR_RESPONSE = 0x0111,
STUN_SHARED_SECRET_REQUEST = 0x0002,
STUN_SHARED_SECRET_RESPONSE = 0x0102,
STUN_SHARED_SECRET_ERROR_RESPONSE = 0x0112,
STUN_ALLOCATE_REQUEST = 0x0003,
STUN_ALLOCATE_RESPONSE = 0x0103,
STUN_ALLOCATE_ERROR_RESPONSE = 0x0113,
STUN_SEND_REQUEST = 0x0004,
STUN_SEND_RESPONSE = 0x0104,
STUN_SEND_ERROR_RESPONSE = 0x0114,
STUN_DATA_INDICATION = 0x0115,
TURN_SEND_INDICATION = 0x0016,
TURN_DATA_INDICATION = 0x0017,
TURN_CREATE_PERMISSION_REQUEST = 0x0008,
TURN_CREATE_PERMISSION_RESPONSE = 0x0108,
TURN_CREATE_PERMISSION_ERROR_RESPONSE = 0x0118,
TURN_CHANNEL_BIND_REQUEST = 0x0009,
TURN_CHANNEL_BIND_RESPONSE = 0x0109,
TURN_CHANNEL_BIND_ERROR_RESPONSE = 0x0119,
};
enum State {
STATE_UNINITIALIZED,
STATE_CONNECTING,
STATE_TLS_CONNECTING,
STATE_OPEN,
STATE_ERROR,
};
P2PSocketHost(IPC::Sender* message_sender,
int socket_id,
ProtocolType protocol_type);
// Verifies that the packet |data| has a valid STUN header. In case
// of success stores type of the message in |type|.
static bool GetStunPacketType(const char* data, int data_size,
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_t[]> packet_header,
size_t header_length,
size_t packet_length,
bool incoming);
// Used by subclasses to track the metrics of delayed bytes and packets.
void IncrementDelayedPackets();
void IncrementTotalSentPackets();
void IncrementDelayedBytes(uint32_t size);
void DecrementDelayedBytes(uint32_t size);
IPC::Sender* message_sender_;
int id_;
State state_;
bool dump_incoming_rtp_packet_;
bool dump_outgoing_rtp_packet_;
RenderProcessHost::WebRtcRtpPacketCallback packet_dump_callback_;
ProtocolType protocol_type_;
private:
// Track total delayed packets for calculating how many packets are
// delayed by system at the end of call.
uint32_t send_packets_delayed_total_;
uint32_t send_packets_total_;
// Track the maximum of consecutive delayed bytes caused by system's
// EWOULDBLOCK.
int32_t send_bytes_delayed_max_;
int32_t send_bytes_delayed_cur_;
base::WeakPtrFactory<P2PSocketHost> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(P2PSocketHost);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_H_
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