1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
// 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.
#include "content/browser/renderer_host/p2p/socket_host.h"
#include "net/base/sys_byteorder.h"
#include "content/browser/renderer_host/p2p/socket_host_tcp.h"
#include "content/browser/renderer_host/p2p/socket_host_tcp_server.h"
#include "content/browser/renderer_host/p2p/socket_host_udp.h"
namespace {
const int kStunHeaderSize = 20;
const uint32 kStunMagicCookie = 0x2112A442;
} // namespace
namespace content {
P2PSocketHost::P2PSocketHost(IPC::Message::Sender* message_sender,
int routing_id, int id)
: message_sender_(message_sender),
routing_id_(routing_id),
id_(id),
state_(STATE_UNINITIALIZED) {
}
P2PSocketHost::~P2PSocketHost() { }
// Verifies that the packet |data| has a valid STUN header.
// static
bool P2PSocketHost::GetStunPacketType(
const char* data, int data_size, StunMessageType* type) {
if (data_size < kStunHeaderSize)
return false;
uint32 cookie = ntohl(*reinterpret_cast<const uint32*>(data + 4));
if (cookie != kStunMagicCookie)
return false;
uint16 length = ntohs(*reinterpret_cast<const uint16*>(data + 2));
if (length != data_size - kStunHeaderSize)
return false;
int message_type = ntohs(*reinterpret_cast<const uint16*>(data));
// Verify that the type is known:
switch (message_type) {
case STUN_BINDING_REQUEST:
case STUN_BINDING_RESPONSE:
case STUN_BINDING_ERROR_RESPONSE:
case STUN_SHARED_SECRET_REQUEST:
case STUN_SHARED_SECRET_RESPONSE:
case STUN_SHARED_SECRET_ERROR_RESPONSE:
case STUN_ALLOCATE_REQUEST:
case STUN_ALLOCATE_RESPONSE:
case STUN_ALLOCATE_ERROR_RESPONSE:
case STUN_SEND_REQUEST:
case STUN_SEND_RESPONSE:
case STUN_SEND_ERROR_RESPONSE:
case STUN_DATA_INDICATION:
*type = static_cast<StunMessageType>(message_type);
return true;
default:
return false;
}
}
// static
bool P2PSocketHost::IsRequestOrResponse(StunMessageType type) {
return type == STUN_BINDING_REQUEST || type == STUN_BINDING_RESPONSE ||
type == STUN_ALLOCATE_REQUEST || type == STUN_ALLOCATE_RESPONSE;
}
// static
P2PSocketHost* P2PSocketHost::Create(
IPC::Message::Sender* message_sender, int routing_id, int id,
P2PSocketType type) {
switch (type) {
case P2P_SOCKET_UDP:
return new P2PSocketHostUdp(message_sender, routing_id, id);
case P2P_SOCKET_TCP_SERVER:
return new P2PSocketHostTcpServer(message_sender, routing_id, id);
case P2P_SOCKET_TCP_CLIENT:
return new P2PSocketHostTcp(message_sender, routing_id, id);
}
NOTREACHED();
return NULL;
}
} // namespace content
|
