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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "backends/networking/enet/source/enet.h"
#include "backends/networking/enet/host.h"
namespace Networking {
Host::Host(ENetHost *host) {
_host = host;
_serverPeer = nullptr;
_recentHost = "";
_recentPort = 0;
_recentPacket = nullptr;
}
Host::Host(ENetHost *host, ENetPeer *serverPeer) {
_host = host;
_serverPeer = serverPeer;
_recentHost = "";
_recentPort = 0;
_recentPacket = nullptr;
}
Host::~Host() {
if (_recentPacket)
destroyPacket();
enet_host_destroy(_host);
}
uint8 Host::service(int timeout) {
ENetEvent event;
enet_host_service(_host, &event, timeout);
if (event.type > ENET_EVENT_TYPE_NONE) {
char hostName[50];
if (enet_address_get_host_ip(&event.peer->address, hostName, 50) == 0)
_recentHost = Common::String(hostName);
_recentPort = event.peer->address.port;
}
if (event.type == ENET_EVENT_TYPE_RECEIVE) {
if (_recentPacket)
destroyPacket();
_recentPacket = event.packet;
}
return event.type;
}
bool Host::connectPeer(const Common::String &address, int port, int timeout, int numChannels) {
ENetAddress enetAddress;
if (address == "255.255.255.255") {
enetAddress.host = ENET_HOST_BROADCAST;
} else {
// NOTE: 0.0.0.0 returns ENET_HOST_ANY normally.
enet_address_set_host(&enetAddress, address.c_str());
}
enetAddress.port = port;
// Connect to server address
ENetPeer *enetPeer = enet_host_connect(_host, &enetAddress, numChannels, 0);
ENetEvent event;
if (enet_host_service(_host, &event, timeout) > 0 && event.type == ENET_EVENT_TYPE_CONNECT) {
debug(1, "ENet: Connection to %s:%d succeeded.", address.c_str(), port);
return true;
}
warning("ENet: Connection to %s:%d failed", address.c_str(), port);
enet_peer_reset(enetPeer);
return false;
}
void Host::disconnectPeer(int peerIndex) {
// calling _later will ensure that all the queued packets are sent before disconnecting.
enet_peer_disconnect_later(&_host->peers[peerIndex], 0);
enet_host_flush(_host);
if (_serverPeer) {
// Allow 3 seconds for disconnection to succeed and drop incoming packets
uint tickCount = 0;
while(tickCount < 3000) {
switch(service(0)) {
case ENET_EVENT_TYPE_RECEIVE:
destroyPacket();
break;
case ENET_EVENT_TYPE_DISCONNECT:
// Disconnect succeeded.
return;
}
g_system->delayMillis(5);
tickCount += 1;
}
}
}
Common::String Host::getHost() {
return _recentHost;
}
int Host::getPort() {
return _recentPort;
}
int Host::getPeerIndexFromHost(const Common::String &host, int port) {
for (int i = 0; i < (int)_host->peerCount; i++) {
char hostName[50];
if (enet_address_get_host_ip(&_host->peers[i].address, hostName, 50) == 0) {
if (host == hostName && port == _host->peers[i].address.port) {
return i;
}
}
}
return -1;
}
Common::String Host::getPacketData() {
if (!_recentPacket)
return "";
return Common::String((const char*)_recentPacket->data, (uint32)_recentPacket->dataLength);
}
void Host::destroyPacket() {
if (!_recentPacket)
return;
enet_packet_destroy(_recentPacket);
_recentPacket = nullptr;
}
bool Host::send(const char *data, int peerIndex, int channel, bool reliable) {
ENetPeer *peer;
if (_serverPeer) {
peer = _serverPeer;
} else {
if (peerIndex > (int)_host->peerCount) {
warning("ENet: Peer index (%d) is too high", peerIndex);
return false;
}
peer = &_host->peers[peerIndex];
}
ENetPacket *packet = enet_packet_create(const_cast<char *>(data), strlen(data), (reliable) ? ENET_PACKET_FLAG_RELIABLE : 0);
enet_peer_send(peer, channel, packet);
enet_host_flush(_host);
return true;
}
bool Host::sendRawData(const Common::String &address, int port, const char *data) {
ENetAddress enetAddress;
if (address == "255.255.255.255") {
enetAddress.host = ENET_HOST_BROADCAST;
} else {
// NOTE: 0.0.0.0 returns ENET_HOST_ANY normally.
enet_address_set_host(&enetAddress, address.c_str());
}
enetAddress.port = port;
ENetBuffer _buffer;
_buffer.data = const_cast<char *>(data);
_buffer.dataLength = strlen(data);
int sentLength = enet_socket_send(_host->socket, &enetAddress, &_buffer, 1);
if (sentLength < 0)
return false;
return true;
}
} // End of namespace Networking
|
