Added dhcp console command
Bryan Roe committed
Jul 23, 2021 at 16:33 UTC
217041737cdb69532067a58a3dc3603fb992e379
2 files changed
+366
agents/meshcore.js
+43
@@ -2885,6 +2885,7 @@ function processConsoleCommand(cmd, args, rights, sessionid) {
2885
case 'help': { // Displays available commands
2886
var fin = '', f = '', availcommands = 'agentupdate,errorlog,msh,timerinfo,coreinfo,coredump,service,fdsnapshot,fdcount,startupoptions,alert,agentsize,versions,help,info,osinfo,args,print,type,dbkeys,dbget,dbset,dbcompact,eval,parseuri,httpget,wslist,plugin,wsconnect,wssend,wsclose,notify,ls,ps,kill,netinfo,location,power,wakeonlan,setdebug,smbios,rawsmbios,toast,lock,users,openurl,getscript,getclip,setclip,log,av,cpuinfo,sysinfo,apf,scanwifi,wallpaper,agentmsg';
2887
if (require('os').dns != null) { availcommands += ',dnsinfo'; }
2888
+ try { require('dhcp'); availcommands += ',dhcp'; } catch (e) { }
2889
if (process.platform == 'win32') { availcommands += ',cs,safemode,wpfhwacceleration,uac'; }
2890
if (amt != null) { availcommands += ',amt,amtconfig,amtevents'; }
2891
if (process.platform != 'freebsd') { availcommands += ',vm'; }
@@ -2900,6 +2901,48 @@ function processConsoleCommand(cmd, args, rights, sessionid) {
2901
response = "Available commands: \r\n" + fin + ".";
2902
break;
2903
}
2904
+ case 'dhcp':
2905
+ {
2906
+ try
2907
+ {
2908
+ require('dhcp');
2909
+ }
2910
+ catch(e)
2911
+ {
2912
+ response = 'Unknown command "dhcp", type "help" for list of avaialble commands.';
2913
+ break;
2914
+ }
2915
+ if(args['_'].length==0)
2916
+ {
2917
+ var j = require('os').networkInterfaces();
2918
+ var ifcs = [];
2919
+ for(var i in j)
2920
+ {
2921
+ for (var z in j[i])
2922
+ {
2923
+ if (j[i][z].status == 'up' && j[i][z].type != 'loopback' && j[i][z].address != null)
2924
+ {
2925
+ ifcs.push('"' + i + '"');
2926
+ break;
2927
+ }
2928
+ }
2929
+ }
2930
+ response = 'Proper usage: dhcp [' + ifcs.join(' | ') + ']';
2931
+ }
2932
+ else
2933
+ {
2934
+ require('dhcp').client.info(args['_'][0]).
2935
+ then(function (d)
2936
+ {
2937
+ sendConsoleText(JSON.stringify(d, null, 1), sessionid);
2938
+ },
2939
+ function (e)
2940
+ {
2941
+ sendConsoleText(e, sessionid);
2942
+ });
2943
+ }
2944
+ break;
2945
+ }
2946
case 'cs':
2947
if (process.platform != 'win32') {
2948
response = 'Unknown command "cs", type "help" for list of avaialble commands.';
agents/modules_meshcore/dhcp.js
new
+323
@@ -0,0 +1,323 @@
1
+/*
2
+Copyright 2021 Intel Corporation
3
+
4
+Licensed under the Apache License, Version 2.0 (the "License");
5
+you may not use this file except in compliance with the License.
6
+You may obtain a copy of the License at
7
+
8
+ http://www.apache.org/licenses/LICENSE-2.0
9
+
10
+Unless required by applicable law or agreed to in writing, software
11
+distributed under the License is distributed on an "AS IS" BASIS,
12
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13
+See the License for the specific language governing permissions and
14
+limitations under the License.
15
+
16
+* @description Mini DHCP Client Module, to fetch configuration data
17
+* @author Bryan Roe & Ylian Saint-Hilaire
18
+*/
19
+
20
+// DHCP Information
21
+if (Function.prototype.internal == null) { Object.defineProperty(Function.prototype, 'internal', { get: function () { return (this); } }); }
22
+if (global._hide == null)
23
+{
24
+ global._hide = function _hide(v)
25
+ {
26
+ if(v==null || (v!=null && typeof(v)=='boolean'))
27
+ {
28
+ var ret = _hide.currentObject;
29
+ if (v) { _hide.currentObject = null; }
30
+ return (ret);
31
+ }
32
+ else
33
+ {
34
+ _hide.currentObject = v;
35
+ }
36
+ }
37
+}
38
+addModule('promise2', Buffer.from('/*
Copyright 2018 Intel Corporation

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

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Promise.resolve = function resolve()
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Promise.reject = function reject() {
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Promise.all = function all(promiseList)
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module.exports = Promise;
module.exports.event_switcher = event_switcher;
module.exports.event_forwarder = event_forwarder;
module.exports.defaultInit = function defaultInit(res, rej) { this.resolve = res; this.reject = rej; }', 'base64').toString());
39
+var promise = require('promise2');
40
+function promise_default(res, rej)
41
+{
42
+ this._res = res;
43
+ this._rej = rej;
44
+}
45
+
46
+
47
+function buf2addr(buf)
48
+{
49
+ return (buf[0] + '.' + buf[1] + '.' + buf[2] + '.' + buf[3]);
50
+}
51
+function parseDHCP(buffer)
52
+{
53
+ var i;
54
+ var packet = Buffer.alloc(buffer.length);
55
+ for (i = 0; i < buffer.length; ++i) { packet[i] = buffer[i]; }
56
+
57
+ var ret = { op: packet[0] == 0 ? 'REQ' : 'RES', hlen: packet[2] }; // OP Code
58
+ ret.xid = packet.readUInt32BE(4); // Transaction ID
59
+ ret.ciaddr = buf2addr(packet.slice(12, 16));
60
+ ret.yiaddr = buf2addr(packet.slice(16, 20));
61
+ ret.siaddr = buf2addr(packet.slice(20, 24));
62
+ ret.giaddr = buf2addr(packet.slice(24, 28));
63
+ ret.chaddr = packet.slice(28, 28 + ret.hlen).toString('hex:');
64
+ if (packet[236] == 99 && packet[237] == 130 && packet[238] == 83 && packet[239] == 99)
65
+ {
66
+ // Magic Cookie Validated
67
+ ret.magic = true;
68
+ ret.options = {};
69
+
70
+ i = 240;
71
+ while(i<packet.length)
72
+ {
73
+ switch(packet[i])
74
+ {
75
+ case 0:
76
+ i += 1;
77
+ break;
78
+ case 255:
79
+ ret.options[255] = true;
80
+ i += 2;
81
+ break;
82
+ default:
83
+ ret.options[packet[i]] = packet.slice(i + 2, i + 2 + packet[i + 1]);
84
+ switch(packet[i])
85
+ {
86
+ case 1: // Subnet Mask
87
+ ret.options.subnetmask = buf2addr(ret.options[1]);
88
+ delete ret.options[1];
89
+ break;
90
+ case 3: // Router
91
+ ret.options.router = [];
92
+ var ti = 0;
93
+ while (ti < ret.options[3].length)
94
+ {
95
+ ret.options.router.push(buf2addr(ret.options[3].slice(ti, ti + 4)));
96
+ ti += 4;
97
+ }
98
+ delete ret.options[3];
99
+ break;
100
+ case 6: // DNS
101
+ ret.options.dns = buf2addr(ret.options[6]);
102
+ delete ret.options[6];
103
+ break;
104
+ case 15: // Domain Name
105
+ ret.options.domainname = ret.options[15].toString();
106
+ delete ret.options[15];
107
+ break;
108
+ case 28: // Broadcast Address
109
+ ret.options.broadcastaddr = buf2addr(ret.options[28]);
110
+ delete ret.options[28];
111
+ break;
112
+ case 51: // Lease Time
113
+ ret.options.lease = { raw: ret.options[51].readInt32BE() };
114
+ delete ret.options[51];
115
+ ret.options.lease.hours = Math.floor(ret.options.lease.raw / 3600);
116
+ ret.options.lease.minutes = Math.floor((ret.options.lease.raw % 3600) / 60);
117
+ ret.options.lease.seconds = (ret.options.lease.raw % 3600) % 60;
118
+ break;
119
+ case 53: // Message Type
120
+ ret.options.messageType = ret.options[53][0];
121
+ delete ret.options[53];
122
+ break;
123
+ case 54: // Server
124
+ ret.options.server = buf2addr(ret.options[54]);
125
+ delete ret.options[54];
126
+ break;
127
+ }
128
+ i += (2 + packet[i + 1]);
129
+ break;
130
+ }
131
+ }
132
+ }
133
+
134
+
135
+ return (ret);
136
+}
137
+
138
+function createPacket(messageType, data)
139
+{
140
+ var b = Buffer.alloc(245);
141
+
142
+ switch(messageType)
143
+ {
144
+ //case 0x02:
145
+ //case 0x04:
146
+ //case 0x05:
147
+ //case 0x06:
148
+ // b[0] = 0x00; // Reply
149
+ // break;
150
+ //case 0x01:
151
+ //case 0x03:
152
+ //case 0x07:
153
+ case 0x08:
154
+ b[0] = 0x01; // Request
155
+ break;
156
+ default:
157
+ throw ('DHCP(' + messageType + ') NOT SUPPORTED');
158
+ break;
159
+ }
160
+
161
+ // Headers
162
+ b[1] = 0x01; // Ethernet
163
+ b[2] = 0x06; // HW Address Length
164
+ b[3] = 0x00; // HOPS
165
+
166
+ // Transaction ID
167
+ var r = Buffer.alloc(4); r.randomFill();
168
+ b.writeUInt32BE(r.readUInt32BE(), 4);
169
+ b.writeUInt16BE(0x8000, 10);
170
+
171
+ // Magic Cookie
172
+ b[236] = 99;
173
+ b[237] = 130;
174
+ b[238] = 83;
175
+ b[239] = 99;
176
+
177
+ // DHCP Message Type
178
+ b[240] = 53;
179
+ b[241] = 1;
180
+ b[242] = messageType;
181
+ b[243] = 255;
182
+
183
+ switch(messageType)
184
+ {
185
+ case 0x08:
186
+ if (data.ciaddress == null) { throw ('ciadress missing'); }
187
+ if (data.chaddress == null) { throw ('chaddress missing'); }
188
+
189
+ // ciaddress
190
+ var a = data.ciaddress.split('.');
191
+ var ci = parseInt(a[0]);
192
+ ci = ci << 8;
193
+ ci = ci | parseInt(a[1]);
194
+ ci = ci << 8;
195
+ ci = ci | parseInt(a[2]);
196
+ ci = ci << 8;
197
+ ci = ci | parseInt(a[3]);
198
+ b.writeInt32BE(ci, 12);
199
+
200
+ // chaddress
201
+ var y = data.chaddress.split(':').join('');
202
+ y = Buffer.from(y, 'hex');
203
+ y.copy(b, 28);
204
+
205
+ break;
206
+ }
207
+
208
+ return (b);
209
+}
210
+
211
+function raw(localAddress, port, buffer, handler)
212
+{
213
+ var ret = new promise(promise_default);
214
+ ret.socket = require('dgram').createSocket({ type: 'udp4' });
215
+ try
216
+ {
217
+ ret.socket.bind({ address: localAddress, port: (port != null && port != 0) ? port : null });
218
+ }
219
+ catch (e)
220
+ {
221
+ ret._rej('Unable to bind to ' + localAddress);
222
+ return (ret);
223
+ }
224
+
225
+ ret.socket.setBroadcast(true);
226
+ ret.socket.setMulticastInterface(localAddress);
227
+ ret.socket.setMulticastTTL(1);
228
+ ret.socket.descriptorMetadata = 'DHCP (' + localAddress + ')';
229
+ ret.socket.on('message', handler.bind(ret));
230
+ ret.socket.send(buffer, 67, '255.255.255.255');
231
+ return (ret);
232
+}
233
+
234
+function info(interfaceName, port)
235
+{
236
+ var f = require('os').networkInterfaces();
237
+ if (interfaceName.split(':').length == 6)
238
+ {
239
+ var newname = null;
240
+ for(var n in f)
241
+ {
242
+ for (var nx in f[n])
243
+ {
244
+ if(f[n][nx].mac.toUpperCase() == interfaceName.toUpperCase())
245
+ {
246
+ newname = n;
247
+ break;
248
+ }
249
+ }
250
+ if(newname)
251
+ {
252
+ interfaceName = newname;
253
+ break;
254
+ }
255
+ }
256
+ }
257
+
258
+
259
+ if (f[interfaceName] != null)
260
+ {
261
+ var i;
262
+ for(i=0;i<f[interfaceName].length;++i)
263
+ {
264
+ if(f[interfaceName][i].family == 'IPv4' && f[interfaceName][i].mac != '00:00:00:00:00:00')
265
+ {
266
+ try
267
+ {
268
+ var b = createPacket(8, { ciaddress: f[interfaceName][i].address, chaddress: f[interfaceName][i].mac });
269
+ _hide(raw(f[interfaceName][i].address, port, b, function infoHandler(msg)
270
+ {
271
+ try
272
+ {
273
+ var res = parseDHCP(msg);
274
+ if (res.chaddr.toUpperCase() == this.hwaddr.toUpperCase() && res.options != null && res.options.lease != null)
275
+ {
276
+ clearTimeout(this.timeout);
277
+ setImmediate(function (s) { try { s.removeAllListeners('message'); } catch (x) { } }, this.socket); // Works around bug in older dgram.js
278
+ this._res(res);
279
+ }
280
+ }
281
+ catch(z)
282
+ {
283
+ }
284
+ }));
285
+ _hide().hwaddr = f[interfaceName][i].mac;
286
+ _hide().timeout = setTimeout(function (x)
287
+ {
288
+ x.socket.removeAllListeners('message');
289
+ x._rej('timeout');
290
+ }, 2000, _hide());
291
+ return (_hide(true));
292
+ }
293
+ catch(e)
294
+ {
295
+ var ret = new promise(promise_default);
296
+ ret._rej(e);
297
+ return (ret);
298
+ }
299
+ }
300
+ }
301
+ }
302
+
303
+ var ret = new promise(promise_default);
304
+ ret._rej('interface (' + interfaceName + ') not found');
305
+ return (ret);
306
+}
307
+
308
+module.exports =
309
+ {
310
+ client: { info: info, raw: raw },
311
+ MESSAGE_TYPES:
312
+ {
313
+ DISCOVER: 1,
314
+ OFFER: 2,
315
+ REQUEST: 3,
316
+ DECLINE: 4,
317
+ ACK: 5,
318
+ NACK: 6,
319
+ RELEASE: 7,
320
+ INFO: 8
321
+ }
322
+ };
323
+