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
|
/**
@file Discovery.cpp
@maintainer Morgan McGuire, matrix@graphics3d.com
@created 2003-06-26
@edited 2005-02-24
*/
#include "G3D/Discovery.h"
#include "G3D/BinaryInput.h"
#include "G3D/BinaryOutput.h"
#include <cstring>
namespace G3D {
///////////////////////////////////////////////////////////////////////////////////////////
void DiscoveryAdvertisement::serialize(BinaryOutput& b) const {
address.serialize(b);
}
void DiscoveryAdvertisement::deserialize(BinaryInput& b) {
address.deserialize(b);
lastUpdateTime = System::time();
}
///////////////////////////////////////////////////////////////////////////////////////////
void DiscoveryServerAddressMessage::serialize(BinaryOutput& b) const {
b.writeString(G3D_DISCOVERY_PROTOCOL_NAME);
b.writeInt32(G3D_DISCOVERY_PROTOCOL_VERSION);
b.writeString(settings->appProtocolName);
b.writeInt32(settings->appProtocolVersion);
// Send addresses
b.writeInt32(address.size());
for (int i = 0; i < address.size(); ++i) {
address[i].serialize(b);
}
}
void DiscoveryServerAddressMessage::deserialize(BinaryInput& b) {
address.clear();
correctProtocol = false;
serverProtocolVersion[0] = 0;
serverProtocolVersion[1] = 0;
// Verify that we are on the same protocol
if (b.readString(strlen(G3D_DISCOVERY_PROTOCOL_NAME) + 1) != G3D_DISCOVERY_PROTOCOL_NAME) {
return;
}
serverProtocolVersion[0] = b.readInt32();
if (serverProtocolVersion[0] != G3D_DISCOVERY_PROTOCOL_VERSION) {
return;
}
if (b.readString() != settings->appProtocolName) {
return;
}
serverProtocolVersion[1] = b.readInt32();
if (serverProtocolVersion[1] != settings->appProtocolVersion) {
return;
}
correctProtocol = true;
address.resize(b.readInt32());
for (int i = 0; i < address.size(); ++i) {
address[i].deserialize(b);
}
}
///////////////////////////////////////////////////////////////////////////////////////////
void DiscoveryServer::sendAnnouncement() const {
NetAddress broadcast(NetworkDevice::instance()->broadcastAddressArray()[0], settings->serverBroadcastPort);
net->send(broadcast, SERVER_BROADCAST_MESSAGE, addressMessage);
const_cast<DiscoveryServer*>(this)->lastBroadcast = System::time();
}
void DiscoveryServer::sendShutDown() const {
NetAddress broadcast(NetworkDevice::instance()->broadcastAddressArray()[0], settings->serverBroadcastPort);
ShutdownMessage s;
net->send(broadcast, SERVER_SHUTDOWN_MESSAGE, s);
}
bool DiscoveryServer::ok() const {
return listener->ok() && net->ok();
}
void DiscoveryServer::init(
const DiscoverySettings* _settings,
DiscoveryAdvertisement* _advertisement) {
Discovery::init(_settings);
advertisement = _advertisement;
addressMessage.settings = settings;
NetworkDevice::instance()->localHostAddresses(addressMessage.address);
// Set the port number
for (int i = 0; i < addressMessage.address.size(); ++i) {
addressMessage.address[i] =
NetAddress(addressMessage.address[i].ip(),
settings->serverAdvertisementPort);
}
net = LightweightConduit::create(settings->clientBroadcastPort, true, true);
listener = NetListener::create(settings->serverAdvertisementPort);
// Send initial announcement
sendAnnouncement();
}
void DiscoveryServer::doNetwork() {
const RealTime UNSOLICITED_BROADCAST_PERIOD = 60;
// Check for client broadcast requests
if (net->messageWaiting()) {
// Some client broadcast that it is looking for servers.
// Respond by sending out our announcement to everyone
// (avoids having to figure out if the message return address
// is correct).
NetAddress dummy;
net->receive(dummy);
sendAnnouncement();
} else if (System::time() > lastBroadcast + UNSOLICITED_BROADCAST_PERIOD) {
sendAnnouncement();
}
// Handle incoming connections
if (listener->clientWaiting()) {
// Respond to this client
ReliableConduitRef client = listener->waitForConnection();
client->send(SERVER_BROADCAST_MESSAGE, *advertisement);
}
}
void DiscoveryServer::cleanup() {
sendShutDown();
}
//////////////////////////////////////////////////////////////////////////////////
std::string IncompatibleServerDescription::toString() const {
return std::string("Incompatible server at ") + address.toString() +
format(", version %d.%d", protocolVersion[0], protocolVersion[1]);
}
//////////////////////////////////////////////////////////////////////////////////
}
|
