blob: 026b641943b3247091eab2849bf727811ab65c88 (
plain)
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
|
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file tcp_turn.cpp Basic functions to receive and send TURN packets.
*/
#include "../../stdafx.h"
#include "../../date_func.h"
#include "../../debug.h"
#include "tcp_turn.h"
#include "../../safeguards.h"
/**
* Handle the given packet, i.e. pass it to the right
* parser receive command.
* @param p the packet to handle
* @return true if we should immediately handle further packets, false otherwise
*/
bool NetworkTurnSocketHandler::HandlePacket(Packet *p)
{
PacketTurnType type = (PacketTurnType)p->Recv_uint8();
switch (type) {
case PACKET_TURN_TURN_ERROR: return this->Receive_TURN_ERROR(p);
case PACKET_TURN_SERCLI_CONNECT: return this->Receive_SERCLI_CONNECT(p);
case PACKET_TURN_TURN_CONNECTED: return this->Receive_TURN_CONNECTED(p);
default:
Debug(net, 0, "[tcp/turn] Received invalid packet type {}", type);
return false;
}
}
/**
* Receive a packet at TCP level
* @return Whether at least one packet was received.
*/
bool NetworkTurnSocketHandler::ReceivePackets()
{
Packet *p;
static const int MAX_PACKETS_TO_RECEIVE = 4;
int i = MAX_PACKETS_TO_RECEIVE;
while (--i != 0 && (p = this->ReceivePacket()) != nullptr) {
bool cont = this->HandlePacket(p);
delete p;
if (!cont) return true;
}
return i != MAX_PACKETS_TO_RECEIVE - 1;
}
/**
* Helper for logging receiving invalid packets.
* @param type The received packet type.
* @return Always false, as it's an error.
*/
bool NetworkTurnSocketHandler::ReceiveInvalidPacket(PacketTurnType type)
{
Debug(net, 0, "[tcp/turn] Received illegal packet type {}", type);
return false;
}
bool NetworkTurnSocketHandler::Receive_TURN_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_ERROR); }
bool NetworkTurnSocketHandler::Receive_SERCLI_CONNECT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_TURN_SERCLI_CONNECT); }
bool NetworkTurnSocketHandler::Receive_TURN_CONNECTED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_CONNECTED); }
|
