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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
// ZeroTier distributed HTTP test agent
// ---------------------------------------------------------------------------
// Customizable parameters:
// Maximum test duration in milliseconds
var TEST_DURATION = (30 * 1000);
// Interval between tests (should be several times longer than TEST_DURATION)
var TEST_INTERVAL = (60 * 2 * 1000);
// Where should I contact to register and query a list of other test agents?
var SERVER_HOST = '174.136.102.178';
var SERVER_PORT = 18080;
// Which port should agents use for their HTTP?
var AGENT_PORT = 18888;
// Payload size in bytes
var PAYLOAD_SIZE = 100000;
// ---------------------------------------------------------------------------
var ipaddr = require('ipaddr.js');
var os = require('os');
var http = require('http');
var async = require('async');
var express = require('express');
var app = express();
// Find our ZeroTier-assigned RFC4193 IPv6 address
var thisAgentId = null;
var interfaces = os.networkInterfaces();
if (!interfaces) {
console.error('FATAL: os.networkInterfaces() failed.');
process.exit(1);
}
for(var ifname in interfaces) {
var ifaddrs = interfaces[ifname];
if (Array.isArray(ifaddrs)) {
for(var i=0;i<ifaddrs.length;++i) {
if (ifaddrs[i].family == 'IPv6') {
try {
var ipbytes = ipaddr.parse(ifaddrs[i].address).toByteArray();
if ((ipbytes.length === 16)&&(ipbytes[0] == 0xfd)&&(ipbytes[9] == 0x99)&&(ipbytes[10] == 0x93)) {
thisAgentId = '';
for(var j=0;j<16;++j) {
var tmp = ipbytes[j].toString(16);
if (tmp.length === 1)
thisAgentId += '0';
thisAgentId += tmp;
}
}
} catch (e) {
console.error(e);
}
}
}
}
}
if (thisAgentId === null) {
console.error('FATAL: no ZeroTier-assigned RFC4193 IPv6 addresses found on any local interface!');
process.exit(1);
}
//console.log(thisAgentId);
// Create a random (and therefore not very compressable) payload
var payload = new Buffer(PAYLOAD_SIZE);
for(var xx=0;xx<PAYLOAD_SIZE;++xx) {
payload.writeUInt8(Math.round(Math.random() * 255.0),xx);
}
// Incremented with each test
var testNumber = 0;
function agentIdToIp(agentId)
{
var ip = '';
ip += agentId.substr(0,4);
ip += ':';
ip += agentId.substr(4,4);
ip += ':';
ip += agentId.substr(8,4);
ip += ':';
ip += agentId.substr(12,4);
ip += ':';
ip += agentId.substr(16,4);
ip += ':';
ip += agentId.substr(20,4);
ip += ':';
ip += agentId.substr(24,4);
ip += ':';
ip += agentId.substr(28,4);
return ip;
};
function registerAndGetPeers(callback)
{
http.get({
host: SERVER_HOST,
port: SERVER_PORT,
path: '/'+thisAgentId
},function(res) {
var body = '';
res.on('data',function(chunk) { body += chunk.toString(); });
res.on('end',function() {
if (!body)
return callback(null,[]);
try {
var peers = JSON.parse(body);
if (Array.isArray(peers))
return callback(null,peers);
else return callback(new Error('invalid JSON response from server'),null);
} catch (e) {
return callback(new Error('invalid JSON response from server: '+e.toString()),null);
}
});
}).on('error',function(e) {
return callback(e,null);
});
};
function performTestOnAllPeers(peers,callback)
{
var allResults = {};
var allRequests = [];
var timedOut = false;
var endOfTestTimer = setTimeout(function() {
timedOut = true;
for(var x=0;x<allRequests.length;++x)
allRequests[x].abort();
},TEST_DURATION);
async.each(peers,function(peer,next) {
if (timedOut)
return next(null);
if (peer.length !== 32)
return next(null);
var connectionStartTime = Date.now();
allResults[peer] = {
start: connectionStartTime,
end: 0,
error: null,
timedOut: false,
bytes: 0
};
allRequests.push(http.get({
host: agentIdToIp(peer),
port: AGENT_PORT,
path: '/'
},function(res) {
var bytes = 0;
res.on('data',function(chunk) {
bytes += chunk.length;
});
res.on('end',function() {
allResults[peer] = {
start: connectionStartTime,
end: Date.now(),
error: null,
timedOut: timedOut,
bytes: bytes
};
return next(null);
});
}).on('error',function(e) {
allResults[peer] = {
start: connectionStartTime,
end: Date.now(),
error: e.toString(),
timedOut: timedOut,
bytes: 0
};
return next(null);
}));
},function(err) {
if (!timedOut)
clearTimeout(endOfTestTimer);
return callback(allResults);
});
};
function doTestsAndReport()
{
registerAndGetPeers(function(err,peers) {
if (err) {
console.error('WARNING: skipping test: unable to contact or query server: '+err.toString());
} else {
performTestOnAllPeers(peers,function(results) {
++testNumber;
var submit = http.request({
host: SERVER_HOST,
port: SERVER_PORT,
path: '/'+testNumber+'/'+thisAgentId,
method: 'POST'
},function(res) {
}).on('error',function(e) {
console.error('WARNING: unable to submit results to server: '+err.toString());
});
submit.write(JSON.stringify(results));
submit.end();
});
}
});
};
// Agents just serve up a test payload
app.get('/',function(req,res) {
return res.status(200).send(payload);
});
var expressServer = app.listen(AGENT_PORT,function () {
registerAndGetPeers(function(err,peers) {
if (err) {
console.error('FATAL: unable to contact or query server: '+err.toString());
process.exit(1);
}
doTestsAndReport();
setInterval(doTestsAndReport,TEST_INTERVAL);
});
});
|
