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Commit | Line | Data |
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fa684c51 | 1 | /* |
2 | * | |
3 | * | |
4 | * | |
5 | * | |
6 | */ | |
7 | ||
8 | #include "aimdump.h" | |
9 | ||
fa684c51 | 10 | #define DEVNAME "eth0" |
11 | ||
12 | pcap_t *pd = NULL; | |
13 | ||
fa684c51 | 14 | pcap_t *open_pcap(char *device) |
15 | { | |
16 | pcap_t *pd = NULL; | |
17 | char errbuf[PCAP_ERRBUF_SIZE]; | |
18 | ||
19 | if (device == NULL) | |
20 | { | |
21 | if ( (device = pcap_lookupdev(errbuf)) == NULL) | |
22 | { | |
23 | fprintf(stderr, "pcap_lookup: %s\n", errbuf); | |
24 | return NULL; | |
25 | } | |
26 | } | |
27 | ||
28 | if ( (pd = pcap_open_live(device, 1500, 1, 500, errbuf)) == NULL) | |
29 | { | |
30 | fprintf(stderr, "pcap_open_live: %s\n", errbuf); | |
31 | return NULL; | |
32 | } | |
33 | ||
34 | return pd; | |
35 | } | |
36 | ||
37 | void showstats(pcap_t *pd) | |
38 | { | |
39 | struct pcap_stat stats; | |
40 | ||
41 | fflush(stdout); | |
42 | printf("\n"); | |
43 | ||
44 | if (pcap_stats(pd, &stats) < 0) | |
45 | { | |
46 | fprintf(stderr, "cap_stats: %s\n", pcap_geterr(pd)); | |
47 | return; | |
48 | } | |
49 | printf("%d packets recieved by filter\n", stats.ps_recv); | |
50 | printf("%d packets dropped by kernel\n", stats.ps_drop); | |
51 | ||
52 | return; | |
53 | } | |
54 | ||
55 | char *next_pcap(pcap_t *pd, struct pcap_pkthdr *hdr) | |
56 | { | |
57 | char *ptr; | |
58 | ||
59 | while ( (ptr = (char *)pcap_next(pd, hdr)) == NULL) | |
60 | ; | |
61 | ||
62 | return ptr; | |
63 | } | |
64 | ||
65 | /* | |
66 | * This covers stage two of the fast-path, after we've determined its | |
67 | * an incoming RPL frame. | |
68 | * | |
69 | */ | |
ee3071b9 | 70 | #if 0 |
fa684c51 | 71 | void processframe(struct pcap_pkthdr *hdr, char *pkt, char *device) |
72 | { | |
73 | static struct ether_header *ether = NULL; | |
74 | #if 0 | |
75 | u_int8_t cmpaddr[ETH_ALEN] = {0x10, 0x00, 0x5a, 0x3b, 0x0b, 0x72}; | |
76 | u_int8_t cmpaddr[ETH_ALEN] = {0x03, 0x00, 0x02, 0x00, 0x00, 0x00}; | |
77 | #endif | |
78 | if ( (!hdr) || (!pkt) ) | |
79 | return; | |
80 | ||
81 | ether = (struct ether_header *)pkt; | |
82 | ||
83 | if (hdr->caplen != hdr->len) | |
84 | fprintf(stderr, "rpld: caplen/len mismatch\n"); | |
85 | ||
86 | ||
87 | if ((clientaddr[0] != 0xff) && cmpether(clientaddr, ether->ether_shost)) | |
88 | { | |
89 | int command = 0x0000; | |
90 | fprintf(stderr, "rpld: got a %sframe from our client\n", (cmpether(multicastaddr, ether->ether_dhost))?"multicast ":""); | |
91 | command = (pkt[19]<<8)+pkt[20]; | |
92 | fprintf(stderr, "rpld: command: 0x%04x\n", command); | |
93 | ||
94 | #if 0 | |
95 | if (command == 0x0001) /* FIND */ | |
96 | send_found(link, device); | |
97 | else if (command == 0x0010) /* Send File Request */ | |
98 | send_file(link, device); | |
99 | #endif | |
100 | ||
101 | } | |
102 | else if (cmpether(multicastaddr, ether->ether_dhost)) | |
103 | { | |
104 | if (clientaddr[0] != 0xff) | |
105 | { | |
106 | /* we're already servicing another client */ | |
107 | fprintf(stderr, "rpld: not adding client %s\n", printether(ether->ether_shost)); | |
108 | return; | |
109 | } | |
110 | else | |
111 | { | |
112 | /* we're not busy yet, lets process this one */ | |
113 | fprintf(stderr, "rpld: adding client %s\n", printether(ether->ether_shost)); | |
114 | memcpy(clientaddr, ether->ether_shost, ETH_ALEN); | |
115 | } | |
116 | } | |
117 | #if 0 | |
118 | else if (cmpether(clientaddr, ether->ether_dhost)) | |
119 | { | |
120 | fprintf(stderr, "rpld: showing outgoing frame...\n"); | |
121 | printframe(hdr, pkt); | |
122 | } | |
123 | #endif | |
124 | else | |
125 | fprintf(stderr, "rpld: uncaught case\n"); | |
126 | ||
127 | #if 0 | |
128 | if (cmpether(cmpaddr, ether->ether_shost) || | |
129 | cmpether(cmpaddr, ether->ether_dhost) ) | |
130 | { | |
131 | printf("\n\n%s > ", printether(ether->ether_shost)); | |
132 | printf("%s\n", printether(ether->ether_dhost)); | |
133 | ||
134 | if (pkt[20] != 0x01) | |
135 | printf("\aSTATUS CHANGE\n"); | |
136 | ||
137 | //pkt = 18; /* skip over ethernet headers */ | |
138 | for (i=0;i<hdr->caplen;i+=2) | |
139 | { | |
140 | if (!((i)%8)) | |
141 | printf("\n\t"); | |
142 | printf("%02x%02x ", pkt[i] &0xff, pkt[i+1] & 0xff); | |
143 | } | |
144 | } | |
145 | else | |
146 | return; | |
147 | #endif | |
148 | } | |
ee3071b9 | 149 | #endif |
fa684c51 | 150 | |
151 | void sigint(int sig) | |
152 | { | |
153 | fflush(stdout); | |
154 | showstats(pd); | |
155 | exit(0); | |
156 | return; | |
157 | } | |
158 | ||
159 | struct flaphdr { | |
ee3071b9 | 160 | unsigned char start; |
161 | unsigned char channel; | |
162 | unsigned short seqnum; | |
163 | unsigned short len; | |
fa684c51 | 164 | }; |
165 | ||
166 | struct snachdr { | |
167 | u_short family; | |
168 | u_short subtype; | |
169 | u_char flags[2]; | |
170 | u_long id; | |
171 | }; | |
172 | ||
173 | struct subtype_s { | |
174 | char *name; | |
175 | void (*parser)(u_char *data, int len); | |
176 | }; | |
177 | ||
178 | struct snactype_s { | |
179 | char *family; | |
180 | struct subtype_s subtypes[21]; | |
181 | } snactypes[16] = { | |
182 | {"Invalid", { | |
183 | {NULL, NULL}} | |
184 | }, | |
185 | {"General", { | |
186 | {"Invalid", NULL}, | |
187 | {"Error", NULL}, | |
188 | {"Client Ready", NULL}, | |
189 | {"Server Ready", NULL}, | |
190 | {"Service Request", NULL}, | |
191 | {"Redirect", NULL}, | |
192 | {"Rate Information Request", NULL}, | |
193 | {"Rate Information", NULL}, | |
194 | {"Rate Information Ack", NULL}, | |
195 | {"Rate Information Change", NULL}, | |
196 | {"Server Pause", NULL}, | |
197 | {"Server Resume", NULL}, | |
198 | {"Request Personal User Information", NULL}, | |
199 | {"Personal User Information", NULL}, | |
200 | {"Evil Notification", NULL}, | |
201 | {"Migration notice", NULL}, | |
202 | {"Message of the Day", NULL}, | |
203 | {"Set Privacy Flags", NULL}, | |
204 | {"Well Known URL", NULL}, | |
205 | {"NOP", NULL}, | |
206 | {NULL, NULL}} | |
207 | }, | |
208 | {"Location", { | |
209 | {"Invalid", NULL}, | |
210 | {"Error", NULL}, | |
211 | {"Request Rights", NULL}, | |
212 | {"Rights Information", NULL}, | |
213 | {"Set user information", NULL}, | |
214 | {"Request User Information", NULL}, | |
215 | {"User Information", NULL}, | |
216 | {"Watcher Sub Request", NULL}, | |
217 | {"Watcher Notification", NULL}, | |
218 | {NULL, NULL}} | |
219 | }, | |
220 | {"Buddy List Management", { | |
221 | {"Invalid", NULL}, | |
222 | {"Error", NULL}, | |
223 | {"Request Rights", NULL}, | |
224 | {"Rights Information", NULL}, | |
225 | {"Add Buddy", NULL}, | |
226 | {"Remove Buddy", NULL}, | |
227 | {"Watcher List Query", NULL}, | |
228 | {"Watcher List Response", NULL}, | |
229 | {"Watcher SubRequest", NULL}, | |
230 | {"Watcher Notification", NULL}, | |
231 | {"Reject Notification", NULL}, | |
232 | {"Oncoming Buddy", NULL}, | |
233 | {"Offgoing Buddy", NULL}, | |
234 | {NULL, NULL}}, | |
235 | }, | |
236 | {"Messeging", { | |
237 | {"Invalid", NULL}, | |
238 | {"Error", NULL}, | |
239 | {"Add ICBM Parameter", NULL}, | |
240 | {"Remove ICBM Parameter", NULL}, | |
241 | {"Request Parameter Information", NULL}, | |
242 | {"Parameter Information", NULL}, | |
243 | {"Outgoing Message", NULL}, | |
244 | {"Incoming Message", parser_icbm_incoming}, | |
245 | {"Evil Request", NULL}, | |
246 | {"Evil Reply", NULL}, | |
247 | {"Missed Calls", NULL}, | |
248 | {"Message Error", NULL}, | |
249 | {"Host Ack", NULL}, | |
250 | {NULL, NULL}} | |
251 | }, | |
252 | {"Advertisements", { | |
253 | {"Invalid", NULL}, | |
254 | {"Error", NULL}, | |
255 | {"Request Ad", NULL}, | |
256 | {"Ad Data (GIFs)", NULL}, | |
257 | {NULL, NULL}} | |
258 | }, | |
259 | {"Invitation / Client-to-Client", { | |
260 | {"Invalid", NULL}, | |
261 | {"Error", NULL}, | |
262 | {"Invite a Friend", NULL}, | |
263 | {"Invitation Ack", NULL}, | |
264 | {NULL, NULL}} | |
265 | }, | |
266 | {"Administrative", { | |
267 | {"Invalid", NULL}, | |
268 | {"Error", NULL}, | |
269 | {"Information Request", NULL}, | |
270 | {"Information Reply", NULL}, | |
271 | {"Information Change Request", NULL}, | |
272 | {"Information Chat Reply", NULL}, | |
273 | {"Account Confirm Request", NULL}, | |
274 | {"Account Confirm Reply", NULL}, | |
275 | {"Account Delete Request", NULL}, | |
276 | {"Account Delete Reply", NULL}, | |
277 | {NULL, NULL}} | |
278 | }, | |
279 | {"Popups", { | |
280 | {"Invalid", NULL}, | |
281 | {"Error", NULL}, | |
282 | {"Display Popup", NULL}, | |
283 | {NULL, NULL}} | |
284 | }, | |
285 | {"BOS", { | |
286 | {"Invalid", NULL}, | |
287 | {"Error", NULL}, | |
288 | {"Request Rights", NULL}, | |
289 | {"Rights Response", NULL}, | |
290 | {"Set group permission mask", NULL}, | |
291 | {"Add permission list entries", NULL}, | |
292 | {"Delete permission list entries", NULL}, | |
293 | {"Add deny list entries", NULL}, | |
294 | {"Delete deny list entries", NULL}, | |
295 | {"Server Error", NULL}, | |
296 | {NULL, NULL}} | |
297 | }, | |
298 | {"User Lookup", { | |
299 | {"Invalid", NULL}, | |
300 | {"Error", NULL}, | |
301 | {"Search Request", NULL}, | |
302 | {"Search Response", NULL}, | |
303 | {NULL, NULL}} | |
304 | }, | |
305 | {"Stats", { | |
306 | {"Invalid", NULL}, | |
307 | {"Error", NULL}, | |
308 | {"Set minimum report interval", NULL}, | |
309 | {"Report Events", NULL}, | |
310 | {NULL, NULL}} | |
311 | }, | |
312 | {"Translate", { | |
313 | {"Invalid", NULL}, | |
314 | {"Error", NULL}, | |
315 | {"Translate Request", NULL}, | |
316 | {"Translate Reply", NULL}, | |
317 | {NULL, NULL}} | |
318 | }, | |
319 | {"Chat Navigation", { | |
320 | {"Invalid", NULL}, | |
321 | {"Error", NULL}, | |
322 | {"Request rights", NULL}, | |
323 | {"Request Exchange Information", NULL}, | |
324 | {"Request Room Information", NULL}, | |
325 | {"Request Occupant List", NULL}, | |
326 | {"Search for Room", NULL}, | |
327 | {"Create Room", NULL}, | |
328 | {"Navigation Information", NULL}, | |
329 | {NULL, NULL}} | |
330 | }, | |
331 | {"Chat", { | |
332 | {"Invalid", NULL}, | |
333 | {"Error", NULL}, | |
334 | {"Room Information Update", NULL}, | |
335 | {"Users Joined", NULL}, | |
336 | {"Users Left", NULL}, | |
337 | {"Outgoing Message", NULL}, | |
338 | {"Incoming Message", NULL}, | |
339 | {"Evil Request", NULL}, | |
340 | {"Evil Reply", NULL}, | |
341 | {"Chat Error", NULL}, | |
342 | {NULL, NULL}} | |
343 | }, | |
344 | {NULL, { | |
345 | {NULL, NULL}} | |
346 | } | |
347 | }; | |
348 | ||
349 | void detectaim(struct pcap_pkthdr *hdr, char *pkt) | |
350 | { | |
351 | int i; | |
352 | struct ether_header *ether = NULL; | |
353 | struct iphdr *ip = NULL; | |
354 | struct tcphdr*tcp= NULL; | |
355 | struct flaphdr *flap = NULL; | |
356 | struct snachdr *snac = NULL; | |
357 | char *orig = pkt; | |
358 | u_int newlen; | |
359 | int maxfamily = 0; | |
360 | int maxsubtype = 0; | |
361 | ||
362 | if ( (!hdr) || (!pkt) ) | |
363 | return; | |
364 | ||
365 | if (hdr->caplen != hdr->len) | |
366 | fprintf(stderr, "aimdump: caplen/len mismatch\n"); | |
367 | ||
368 | newlen = hdr->caplen; | |
369 | ||
370 | ether = (struct ether_header *)pkt; | |
371 | ||
372 | #if 0 | |
373 | printf("\n\naimdump: %s > ", printether(ether->ether_shost)); | |
374 | printf("%s\n", printether(ether->ether_dhost)); | |
375 | #endif | |
376 | ||
377 | pkt += sizeof(struct ether_header); /* skip over ether headers */ | |
378 | newlen -= sizeof(struct ether_header); | |
379 | ||
380 | ip = (struct iphdr *)pkt; | |
381 | if (ip->version != 0x4) | |
382 | return; /* ditch non IPv4 packets */ | |
383 | pkt += (ip->ihl)*4; | |
384 | newlen -= (ip->ihl)*4; | |
385 | ||
386 | tcp = (struct tcphdr *)pkt; | |
387 | if(!tcp->psh) /* we only want actual data packets */ | |
388 | return; | |
389 | pkt += sizeof(struct tcphdr); | |
390 | newlen -= sizeof(struct tcphdr); | |
391 | ||
392 | flap = (struct flaphdr *)pkt; | |
393 | ||
394 | if (flap->start != 0x2a) | |
395 | return; /* ditch non-FLAP packets */ | |
396 | ||
397 | #if 0 | |
398 | /* TODO: notify user of new connections (SYN) and closed connections (FIN) */ | |
399 | printf("\nTCP options: %s %s %s %s %s %s\n\n", | |
400 | tcp->fin?"fin":"", | |
401 | tcp->syn?"syn":"", | |
402 | tcp->rst?"rst":"", | |
403 | tcp->psh?"psh":"", | |
404 | tcp->ack?"ack":"", | |
405 | tcp->urg?"urg":""); | |
406 | #endif | |
407 | ||
408 | flap->seqnum = ntohs(flap->seqnum); | |
409 | flap->len = ntohs(flap->len); | |
410 | ||
411 | snac = (struct snachdr *)(pkt+6); | |
412 | ||
413 | snac->family = ntohs(snac->family); | |
414 | snac->subtype= ntohs(snac->subtype); | |
415 | snac->id = (htons(snac->id & 0x0000ffff)) + (htons(snac->id >>16)<<16); | |
416 | ||
417 | printf("\n--------------------\n"); | |
ee3071b9 | 418 | { |
419 | struct in_addr tmpaddr; | |
420 | tmpaddr.s_addr = ip->saddr; | |
421 | printf("%s -> ", inet_ntoa(tmpaddr)); | |
422 | tmpaddr.s_addr = ip->daddr; | |
423 | printf("%s\n\n", inet_ntoa(tmpaddr)); | |
424 | } | |
fa684c51 | 425 | printf("FLAP:\n"); |
426 | printf("\tChannel:\t0x%02x\t\tSeqNum:\t0x%04x\n\tLength:\t\t0x%04x\n", | |
427 | flap->channel, | |
428 | flap->seqnum, | |
429 | flap->len); | |
430 | printf("SNAC:\n"); | |
431 | ||
432 | ||
433 | /* for overrun checking... */ | |
434 | for (maxfamily=1;snactypes[maxfamily].family; maxfamily++) | |
435 | ; | |
436 | if (snac->family <= maxfamily) | |
437 | { | |
438 | for (maxsubtype=1;snactypes[snac->family].subtypes[maxsubtype].name; maxsubtype++) | |
439 | ; | |
440 | } | |
441 | maxfamily--; | |
442 | maxsubtype--; | |
443 | ||
444 | printf("\tFamily:\t\t0x%04x (%s)\n", | |
445 | snac->family, | |
446 | (snac->family > maxfamily)?"Out of Range":snactypes[snac->family].family); | |
447 | printf("\tSubtype:\t0x%04x (%s)\n", | |
448 | snac->subtype, | |
449 | (snac->subtype > maxsubtype)?"Out of Range":snactypes[snac->family].subtypes[snac->subtype].name); | |
450 | printf("\tFlags:\t\t0x%02x,0x%02x\tID:\t0x%08lx\n", snac->flags[0], snac->flags[1], snac->id); | |
451 | ||
452 | /* jump around flap+snac */ | |
453 | pkt += 16; | |
454 | newlen -= 16; | |
455 | ||
456 | if (snactypes[snac->family].subtypes[snac->subtype].parser) | |
457 | (*(snactypes[snac->family].subtypes[snac->subtype].parser))((u_char *)pkt, newlen); | |
458 | ||
459 | printf("\nRAW:\n"); | |
460 | ||
461 | for (i=0;i<newlen;i+=2) | |
462 | { | |
463 | if (!((i)%16)) | |
464 | printf("\n\t"); | |
465 | printf("%02x%02x ", pkt[i] &0xff, pkt[i+1] & 0xff); | |
466 | } | |
467 | printf("\n\n"); | |
468 | ||
469 | fflush(stdout); | |
470 | pkt = orig; | |
471 | } | |
472 | ||
473 | int main(int argc, char **argv) | |
474 | { | |
475 | struct pcap_pkthdr hdr; | |
476 | char *pkt; | |
477 | ||
478 | if ((pd = open_pcap(NULL)) == NULL) | |
479 | { | |
480 | fprintf(stderr, "error in open_pcap\n"); | |
481 | exit (-1); | |
482 | } | |
483 | ||
484 | signal(SIGINT, sigint); | |
485 | ||
486 | #if 0 | |
487 | if ((localmac = (u_int8_t *)get_hwaddr(link, DEVNAME, errbuf)) == NULL) | |
488 | { | |
489 | fprintf(stderr, "rpld: Unable to get local MAC address, using default\n"); | |
490 | localmac = defsource; | |
491 | } | |
492 | ||
493 | fprintf(stderr, "rpld: Local MAC Address: %s\n", printether((u_int8_t *)localmac)); | |
494 | #endif | |
495 | ||
496 | #if 1 | |
497 | while ((pkt = next_pcap(pd, &hdr))) | |
498 | { | |
499 | detectaim(&hdr, pkt); | |
500 | //printframe(&hdr, pkt); | |
501 | } | |
502 | #endif | |
503 | #if 0 | |
504 | while (pkt = next_pcap(pd, &hdr)) | |
505 | { | |
506 | /* | |
507 | * Since this is the fast-path (it gets executed for | |
508 | * EVERY frame that gets captured -- this could be HUGE | |
509 | * on busy 100mb LANs), we need to determine if this frame | |
510 | * needs further processing as fast as possible... | |
511 | */ | |
512 | etherhdr = (struct ether_header *)pkt; | |
513 | ||
514 | /* this should cover everything */ | |
515 | if ( (etherhdr->ether_type == (ETHERTYPE_INCOMING<<8)) || | |
516 | (etherhdr->ether_type == (ETHERTYPE_FOUND<<8)) || | |
517 | (etherhdr->ether_type == (ETHERTYPE_DATA<<8)) ) | |
518 | processframe(&hdr, pkt, link, DEVNAME); | |
519 | else | |
520 | fprintf(stderr, "rpld: skipping ethertype %04x\n", etherhdr->ether_type); | |
521 | } | |
522 | #endif | |
523 | showstats(pd); | |
524 | ||
525 | return 0; | |
526 | } |