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Commit | Line | Data |
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1 | /* | |
2 | * aim_login.c | |
3 | * | |
4 | * This contains all the functions needed to actually login. | |
5 | * | |
6 | */ | |
7 | ||
8 | #define FAIM_INTERNAL | |
9 | #include <aim.h> | |
10 | ||
11 | #include "md5.h" | |
12 | ||
13 | static int aim_encode_password(const char *password, unsigned char *encoded); | |
14 | ||
15 | faim_export int aim_sendconnack(struct aim_session_t *sess, | |
16 | struct aim_conn_t *conn) | |
17 | { | |
18 | int curbyte=0; | |
19 | ||
20 | struct command_tx_struct *newpacket; | |
21 | ||
22 | if (!(newpacket = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0001, 4))) | |
23 | return -1; | |
24 | ||
25 | newpacket->lock = 1; | |
26 | ||
27 | curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); | |
28 | curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001); | |
29 | ||
30 | newpacket->lock = 0; | |
31 | return aim_tx_enqueue(sess, newpacket); | |
32 | } | |
33 | ||
34 | /* | |
35 | * In AIM 3.5 protocol, the first stage of login is to request | |
36 | * login from the Authorizer, passing it the screen name | |
37 | * for verification. If the name is invalid, a 0017/0003 | |
38 | * is spit back, with the standard error contents. If valid, | |
39 | * a 0017/0007 comes back, which is the signal to send | |
40 | * it the main login command (0017/0002). | |
41 | */ | |
42 | faim_export int aim_request_login(struct aim_session_t *sess, | |
43 | struct aim_conn_t *conn, | |
44 | char *sn) | |
45 | { | |
46 | int curbyte; | |
47 | struct command_tx_struct *newpacket; | |
48 | ||
49 | if (!sess || !conn || !sn) | |
50 | return -1; | |
51 | ||
52 | /* | |
53 | * For ICQ, we enable the ancient horrible login and stuff | |
54 | * a key packet into the queue to make it look like we got | |
55 | * a reply back. This is so the client doesn't know we're | |
56 | * really not doing MD5 login. | |
57 | * | |
58 | * This may sound stupid, but I'm not in the best of moods and | |
59 | * I don't plan to keep support for this crap around much longer. | |
60 | * Its all AOL's fault anyway, really. I hate AOL. Really. They | |
61 | * always seem to be able to piss me off by doing the dumbest little | |
62 | * things. Like disabling MD5 logins for ICQ UINs, or adding purposefully | |
63 | * wrong TLV lengths, or adding superfluous information to host strings, | |
64 | * or... I'll stop. | |
65 | * | |
66 | */ | |
67 | if ((sn[0] >= '0') && (sn[0] <= '9')) { | |
68 | struct command_rx_struct *newrx; | |
69 | int i; | |
70 | ||
71 | if (!(newrx = (struct command_rx_struct *)malloc(sizeof(struct command_rx_struct)))) | |
72 | return -1; | |
73 | memset(newrx, 0x00, sizeof(struct command_rx_struct)); | |
74 | newrx->lock = 1; | |
75 | newrx->hdrtype = AIM_FRAMETYPE_OSCAR; | |
76 | newrx->hdr.oscar.type = 0x02; | |
77 | newrx->hdr.oscar.seqnum = 0; | |
78 | newrx->commandlen = 10+2+1; | |
79 | newrx->nofree = 0; | |
80 | if (!(newrx->data = malloc(newrx->commandlen))) { | |
81 | free(newrx); | |
82 | return -1; | |
83 | } | |
84 | ||
85 | i = aim_putsnac(newrx->data, 0x0017, 0x0007, 0x0000, 0x0000); | |
86 | i += aimutil_put16(newrx->data+i, 0x01); | |
87 | i += aimutil_putstr(newrx->data+i, "0", 1); | |
88 | ||
89 | newrx->conn = conn; | |
90 | ||
91 | newrx->next = sess->queue_incoming; | |
92 | sess->queue_incoming = newrx; | |
93 | ||
94 | newrx->lock = 0; | |
95 | ||
96 | sess->flags &= ~AIM_SESS_FLAGS_SNACLOGIN; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | sess->flags |= AIM_SESS_FLAGS_SNACLOGIN; | |
102 | ||
103 | aim_sendconnack(sess, conn); | |
104 | ||
105 | if (!(newpacket = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0002, 10+2+2+strlen(sn)))) | |
106 | return -1; | |
107 | ||
108 | newpacket->lock = 1; | |
109 | ||
110 | curbyte = aim_putsnac(newpacket->data, 0x0017, 0x0006, 0x0000, 0x00010000); | |
111 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0001, strlen(sn), sn); | |
112 | ||
113 | newpacket->commandlen = curbyte; | |
114 | newpacket->lock = 0; | |
115 | ||
116 | return aim_tx_enqueue(sess, newpacket); | |
117 | } | |
118 | ||
119 | /* | |
120 | * send_login(int socket, char *sn, char *password) | |
121 | * | |
122 | * This is the initial login request packet. | |
123 | * | |
124 | * NOTE!! If you want/need to make use of the aim_sendmemblock() function, | |
125 | * then the client information you send here must exactly match the | |
126 | * executable that you're pulling the data from. | |
127 | * | |
128 | * Latest WinAIM: | |
129 | * clientstring = "AOL Instant Messenger (SM), version 4.3.2188/WIN32" | |
130 | * major2 = 0x0109 | |
131 | * major = 0x0400 | |
132 | * minor = 0x0003 | |
133 | * minor2 = 0x0000 | |
134 | * build = 0x088c | |
135 | * unknown = 0x00000086 | |
136 | * lang = "en" | |
137 | * country = "us" | |
138 | * unknown4a = 0x01 | |
139 | * | |
140 | * Latest WinAIM that libfaim can emulate without server-side buddylists: | |
141 | * clientstring = "AOL Instant Messenger (SM), version 4.1.2010/WIN32" | |
142 | * major2 = 0x0004 | |
143 | * major = 0x0004 | |
144 | * minor = 0x0001 | |
145 | * minor2 = 0x0000 | |
146 | * build = 0x07da | |
147 | * unknown= 0x0000004b | |
148 | * | |
149 | * WinAIM 3.5.1670: | |
150 | * clientstring = "AOL Instant Messenger (SM), version 3.5.1670/WIN32" | |
151 | * major2 = 0x0004 | |
152 | * major = 0x0003 | |
153 | * minor = 0x0005 | |
154 | * minor2 = 0x0000 | |
155 | * build = 0x0686 | |
156 | * unknown =0x0000002a | |
157 | * | |
158 | * Java AIM 1.1.19: | |
159 | * clientstring = "AOL Instant Messenger (TM) version 1.1.19 for Java built 03/24/98, freeMem 215871 totalMem 1048567, i686, Linus, #2 SMP Sun Feb 11 03:41:17 UTC 2001 2.4.1-ac9, IBM Corporation, 1.1.8, 45.3, Tue Mar 27 12:09:17 PST 2001" | |
160 | * major2 = 0x0001 | |
161 | * major = 0x0001 | |
162 | * minor = 0x0001 | |
163 | * minor2 = (not sent) | |
164 | * build = 0x0013 | |
165 | * unknown= (not sent) | |
166 | * | |
167 | * AIM for Linux 1.1.112: | |
168 | * clientstring = "AOL Instant Messenger (SM)" | |
169 | * major2 = 0x1d09 | |
170 | * major = 0x0001 | |
171 | * minor = 0x0001 | |
172 | * minor2 = 0x0001 | |
173 | * build = 0x0070 | |
174 | * unknown= 0x0000008b | |
175 | * serverstore = 0x01 | |
176 | * | |
177 | */ | |
178 | faim_export int aim_send_login (struct aim_session_t *sess, | |
179 | struct aim_conn_t *conn, | |
180 | char *sn, char *password, | |
181 | struct client_info_s *clientinfo, | |
182 | char *key) | |
183 | { | |
184 | int curbyte=0; | |
185 | struct command_tx_struct *newpacket; | |
186 | ||
187 | if (!clientinfo || !sn || !password) | |
188 | return -1; | |
189 | ||
190 | if (!(newpacket = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0002, 1152))) | |
191 | return -1; | |
192 | ||
193 | newpacket->lock = 1; | |
194 | ||
195 | newpacket->hdr.oscar.type = (sess->flags & AIM_SESS_FLAGS_SNACLOGIN)?0x02:0x01; | |
196 | ||
197 | if (sess->flags & AIM_SESS_FLAGS_SNACLOGIN) | |
198 | curbyte = aim_putsnac(newpacket->data, 0x0017, 0x0002, 0x0000, 0x00010000); | |
199 | else { | |
200 | curbyte = aimutil_put16(newpacket->data, 0x0000); | |
201 | curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001); | |
202 | } | |
203 | ||
204 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0001, strlen(sn), sn); | |
205 | ||
206 | if (sess->flags & AIM_SESS_FLAGS_SNACLOGIN) { | |
207 | unsigned char digest[16]; | |
208 | ||
209 | aim_encode_password_md5(password, key, digest); | |
210 | curbyte+= aim_puttlv_str(newpacket->data+curbyte, 0x0025, 16, (char *)digest); | |
211 | } else { | |
212 | char *password_encoded; | |
213 | ||
214 | password_encoded = (char *) malloc(strlen(password)); | |
215 | aim_encode_password(password, password_encoded); | |
216 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0002, strlen(password), password_encoded); | |
217 | free(password_encoded); | |
218 | } | |
219 | ||
220 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0003, strlen(clientinfo->clientstring), clientinfo->clientstring); | |
221 | ||
222 | if (sess->flags & AIM_SESS_FLAGS_SNACLOGIN) { | |
223 | ||
224 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0016, (unsigned short)clientinfo->major2); | |
225 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0017, (unsigned short)clientinfo->major); | |
226 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0018, (unsigned short)clientinfo->minor); | |
227 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0019, (unsigned short)clientinfo->minor2); | |
228 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x001a, (unsigned short)clientinfo->build); | |
229 | ||
230 | } else { | |
231 | /* Use very specific version numbers, to further indicate the hack. */ | |
232 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0016, 0x010a); | |
233 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0017, 0x0004); | |
234 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0018, 0x003c); | |
235 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0019, 0x0001); | |
236 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x001a, 0x0cce); | |
237 | curbyte += aim_puttlv_32(newpacket->data+curbyte, 0x0014, 0x00000055); | |
238 | } | |
239 | ||
240 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000e, strlen(clientinfo->country), clientinfo->country); | |
241 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000f, strlen(clientinfo->lang), clientinfo->lang); | |
242 | ||
243 | if (sess->flags & AIM_SESS_FLAGS_SNACLOGIN) { | |
244 | curbyte += aim_puttlv_32(newpacket->data+curbyte, 0x0014, clientinfo->unknown); | |
245 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0009, 0x0015); | |
246 | } | |
247 | ||
248 | newpacket->commandlen = curbyte; | |
249 | ||
250 | newpacket->lock = 0; | |
251 | return aim_tx_enqueue(sess, newpacket); | |
252 | } | |
253 | ||
254 | faim_export int aim_encode_password_md5(const char *password, const char *key, unsigned char *digest) | |
255 | { | |
256 | md5_state_t state; | |
257 | ||
258 | md5_init(&state); | |
259 | md5_append(&state, (const md5_byte_t *)key, strlen(key)); | |
260 | md5_append(&state, (const md5_byte_t *)password, strlen(password)); | |
261 | md5_append(&state, (const md5_byte_t *)AIM_MD5_STRING, strlen(AIM_MD5_STRING)); | |
262 | md5_finish(&state, (md5_byte_t *)digest); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | /** | |
268 | * aim_encode_password - Encode a password using old XOR method | |
269 | * @password: incoming password | |
270 | * @encoded: buffer to put encoded password | |
271 | * | |
272 | * This takes a const pointer to a (null terminated) string | |
273 | * containing the unencoded password. It also gets passed | |
274 | * an already allocated buffer to store the encoded password. | |
275 | * This buffer should be the exact length of the password without | |
276 | * the null. The encoded password buffer /is not %NULL terminated/. | |
277 | * | |
278 | * The encoding_table seems to be a fixed set of values. We'll | |
279 | * hope it doesn't change over time! | |
280 | * | |
281 | * This is only used for the XOR method, not the better MD5 method. | |
282 | * | |
283 | */ | |
284 | static int aim_encode_password(const char *password, unsigned char *encoded) | |
285 | { | |
286 | u_char encoding_table[] = { | |
287 | #if 0 /* old v1 table */ | |
288 | 0xf3, 0xb3, 0x6c, 0x99, | |
289 | 0x95, 0x3f, 0xac, 0xb6, | |
290 | 0xc5, 0xfa, 0x6b, 0x63, | |
291 | 0x69, 0x6c, 0xc3, 0x9f | |
292 | #else /* v2.1 table, also works for ICQ */ | |
293 | 0xf3, 0x26, 0x81, 0xc4, | |
294 | 0x39, 0x86, 0xdb, 0x92, | |
295 | 0x71, 0xa3, 0xb9, 0xe6, | |
296 | 0x53, 0x7a, 0x95, 0x7c | |
297 | #endif | |
298 | }; | |
299 | ||
300 | int i; | |
301 | ||
302 | for (i = 0; i < strlen(password); i++) | |
303 | encoded[i] = (password[i] ^ encoding_table[i]); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Generate an authorization response. | |
310 | * | |
311 | * You probably don't want this unless you're writing an AIM server. | |
312 | * | |
313 | */ | |
314 | faim_export unsigned long aim_sendauthresp(struct aim_session_t *sess, | |
315 | struct aim_conn_t *conn, | |
316 | char *sn, int errorcode, | |
317 | char *errorurl, char *bosip, | |
318 | char *cookie, char *email, | |
319 | int regstatus) | |
320 | { | |
321 | struct command_tx_struct *tx; | |
322 | struct aim_tlvlist_t *tlvlist = NULL; | |
323 | ||
324 | if (!(tx = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0004, 1152))) | |
325 | return -1; | |
326 | ||
327 | tx->lock = 1; | |
328 | ||
329 | if (sn) | |
330 | aim_addtlvtochain_str(&tlvlist, 0x0001, sn, strlen(sn)); | |
331 | else | |
332 | aim_addtlvtochain_str(&tlvlist, 0x0001, sess->sn, strlen(sess->sn)); | |
333 | ||
334 | if (errorcode) { | |
335 | aim_addtlvtochain16(&tlvlist, 0x0008, errorcode); | |
336 | aim_addtlvtochain_str(&tlvlist, 0x0004, errorurl, strlen(errorurl)); | |
337 | } else { | |
338 | aim_addtlvtochain_str(&tlvlist, 0x0005, bosip, strlen(bosip)); | |
339 | aim_addtlvtochain_str(&tlvlist, 0x0006, cookie, AIM_COOKIELEN); | |
340 | aim_addtlvtochain_str(&tlvlist, 0x0011, email, strlen(email)); | |
341 | aim_addtlvtochain16(&tlvlist, 0x0013, (unsigned short)regstatus); | |
342 | } | |
343 | ||
344 | tx->commandlen = aim_writetlvchain(tx->data, tx->commandlen, &tlvlist); | |
345 | tx->lock = 0; | |
346 | ||
347 | return aim_tx_enqueue(sess, tx); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Generate a random cookie. (Non-client use only) | |
352 | */ | |
353 | faim_export int aim_gencookie(unsigned char *buf) | |
354 | { | |
355 | int i; | |
356 | ||
357 | srand(time(NULL)); | |
358 | ||
359 | for (i=0; i < AIM_COOKIELEN; i++) | |
360 | buf[i] = 1+(int) (256.0*rand()/(RAND_MAX+0.0)); | |
361 | ||
362 | return i; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Send Server Ready. (Non-client) | |
367 | */ | |
368 | faim_export int aim_sendserverready(struct aim_session_t *sess, struct aim_conn_t *conn) | |
369 | { | |
370 | struct command_tx_struct *tx; | |
371 | int i = 0; | |
372 | ||
373 | if (!(tx = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0002, 10+0x22))) | |
374 | return -1; | |
375 | ||
376 | tx->lock = 1; | |
377 | ||
378 | i += aim_putsnac(tx->data, 0x0001, 0x0003, 0x0000, sess->snac_nextid++); | |
379 | ||
380 | i += aimutil_put16(tx->data+i, 0x0001); | |
381 | i += aimutil_put16(tx->data+i, 0x0002); | |
382 | i += aimutil_put16(tx->data+i, 0x0003); | |
383 | i += aimutil_put16(tx->data+i, 0x0004); | |
384 | i += aimutil_put16(tx->data+i, 0x0006); | |
385 | i += aimutil_put16(tx->data+i, 0x0008); | |
386 | i += aimutil_put16(tx->data+i, 0x0009); | |
387 | i += aimutil_put16(tx->data+i, 0x000a); | |
388 | i += aimutil_put16(tx->data+i, 0x000b); | |
389 | i += aimutil_put16(tx->data+i, 0x000c); | |
390 | i += aimutil_put16(tx->data+i, 0x0013); | |
391 | i += aimutil_put16(tx->data+i, 0x0015); | |
392 | ||
393 | tx->commandlen = i; | |
394 | tx->lock = 0; | |
395 | return aim_tx_enqueue(sess, tx); | |
396 | } | |
397 | ||
398 | ||
399 | /* | |
400 | * Send service redirect. (Non-Client) | |
401 | */ | |
402 | faim_export unsigned long aim_sendredirect(struct aim_session_t *sess, | |
403 | struct aim_conn_t *conn, | |
404 | unsigned short servid, | |
405 | char *ip, | |
406 | char *cookie) | |
407 | { | |
408 | struct command_tx_struct *tx; | |
409 | struct aim_tlvlist_t *tlvlist = NULL; | |
410 | int i = 0; | |
411 | ||
412 | if (!(tx = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0002, 1152))) | |
413 | return -1; | |
414 | ||
415 | tx->lock = 1; | |
416 | ||
417 | i += aim_putsnac(tx->data+i, 0x0001, 0x0005, 0x0000, 0x00000000); | |
418 | ||
419 | aim_addtlvtochain16(&tlvlist, 0x000d, servid); | |
420 | aim_addtlvtochain_str(&tlvlist, 0x0005, ip, strlen(ip)); | |
421 | aim_addtlvtochain_str(&tlvlist, 0x0006, cookie, AIM_COOKIELEN); | |
422 | ||
423 | tx->commandlen = aim_writetlvchain(tx->data+i, tx->commandlen-i, &tlvlist)+i; | |
424 | aim_freetlvchain(&tlvlist); | |
425 | ||
426 | tx->lock = 0; | |
427 | return aim_tx_enqueue(sess, tx); | |
428 | } | |
429 | ||
430 | ||
431 | static int hostonline(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
432 | { | |
433 | rxcallback_t userfunc; | |
434 | int ret = 0; | |
435 | unsigned short *families; | |
436 | int famcount, i; | |
437 | ||
438 | famcount = datalen/2; | |
439 | ||
440 | if (!(families = malloc(datalen))) | |
441 | return 0; | |
442 | ||
443 | for (i = 0; i < famcount; i++) | |
444 | families[i] = aimutil_get16(data+(i*2)); | |
445 | ||
446 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
447 | ret = userfunc(sess, rx, famcount, families); | |
448 | ||
449 | free(families); | |
450 | ||
451 | return ret; | |
452 | } | |
453 | ||
454 | static int redirect(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
455 | { | |
456 | int serviceid; | |
457 | unsigned char *cookie; | |
458 | char *ip; | |
459 | rxcallback_t userfunc; | |
460 | struct aim_tlvlist_t *tlvlist; | |
461 | char *chathack = NULL; | |
462 | int chathackex = 0; | |
463 | int ret = 0; | |
464 | ||
465 | tlvlist = aim_readtlvchain(data, datalen); | |
466 | ||
467 | if (!aim_gettlv(tlvlist, 0x000d, 1) || | |
468 | !aim_gettlv(tlvlist, 0x0005, 1) || | |
469 | !aim_gettlv(tlvlist, 0x0006, 1)) { | |
470 | aim_freetlvchain(&tlvlist); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | serviceid = aim_gettlv16(tlvlist, 0x000d, 1); | |
475 | ip = aim_gettlv_str(tlvlist, 0x0005, 1); | |
476 | cookie = aim_gettlv_str(tlvlist, 0x0006, 1); | |
477 | ||
478 | /* | |
479 | * Chat hack. | |
480 | * | |
481 | */ | |
482 | if ((serviceid == AIM_CONN_TYPE_CHAT) && sess->pendingjoin) { | |
483 | chathack = sess->pendingjoin; | |
484 | chathackex = sess->pendingjoinexchange; | |
485 | sess->pendingjoin = NULL; | |
486 | sess->pendingjoinexchange = 0; | |
487 | } | |
488 | ||
489 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
490 | ret = userfunc(sess, rx, serviceid, ip, cookie, chathack, chathackex); | |
491 | ||
492 | free(ip); | |
493 | free(cookie); | |
494 | free(chathack); | |
495 | ||
496 | aim_freetlvchain(&tlvlist); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | /* | |
502 | * The Rate Limiting System, An Abridged Guide to Nonsense. | |
503 | * | |
504 | * OSCAR defines several 'rate classes'. Each class has seperate | |
505 | * rate limiting properties (limit level, alert level, disconnect | |
506 | * level, etc), and a set of SNAC family/type pairs associated with | |
507 | * it. The rate classes, their limiting properties, and the definitions | |
508 | * of which SNACs are belong to which class, are defined in the | |
509 | * Rate Response packet at login to each host. | |
510 | * | |
511 | * Logically, all rate offenses within one class count against further | |
512 | * offenses for other SNACs in the same class (ie, sending messages | |
513 | * too fast will limit the number of user info requests you can send, | |
514 | * since those two SNACs are in the same rate class). | |
515 | * | |
516 | * Since the rate classes are defined dynamically at login, the values | |
517 | * below may change. But they seem to be fairly constant. | |
518 | * | |
519 | * Currently, BOS defines five rate classes, with the commonly used | |
520 | * members as follows... | |
521 | * | |
522 | * Rate class 0x0001: | |
523 | * - Everything thats not in any of the other classes | |
524 | * | |
525 | * Rate class 0x0002: | |
526 | * - Buddy list add/remove | |
527 | * - Permit list add/remove | |
528 | * - Deny list add/remove | |
529 | * | |
530 | * Rate class 0x0003: | |
531 | * - User information requests | |
532 | * - Outgoing ICBMs | |
533 | * | |
534 | * Rate class 0x0004: | |
535 | * - A few unknowns: 2/9, 2/b, and f/2 | |
536 | * | |
537 | * Rate class 0x0005: | |
538 | * - Chat room create | |
539 | * - Outgoing chat ICBMs | |
540 | * | |
541 | * The only other thing of note is that class 5 (chat) has slightly looser | |
542 | * limiting properties than class 3 (normal messages). But thats just a | |
543 | * small bit of trivia for you. | |
544 | * | |
545 | * The last thing that needs to be learned about the rate limiting | |
546 | * system is how the actual numbers relate to the passing of time. This | |
547 | * seems to be a big mystery. | |
548 | * | |
549 | */ | |
550 | ||
551 | /* XXX parse this */ | |
552 | static int rateresp(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
553 | { | |
554 | rxcallback_t userfunc; | |
555 | ||
556 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
557 | return userfunc(sess, rx); | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
562 | static int ratechange(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
563 | { | |
564 | rxcallback_t userfunc; | |
565 | int i = 0, code; | |
566 | unsigned long currentavg, maxavg; | |
567 | unsigned long rateclass, windowsize, clear, alert, limit, disconnect; | |
568 | ||
569 | code = aimutil_get16(data+i); | |
570 | i += 2; | |
571 | ||
572 | rateclass = aimutil_get16(data+i); | |
573 | i += 2; | |
574 | ||
575 | windowsize = aimutil_get32(data+i); | |
576 | i += 4; | |
577 | clear = aimutil_get32(data+i); | |
578 | i += 4; | |
579 | alert = aimutil_get32(data+i); | |
580 | i += 4; | |
581 | limit = aimutil_get32(data+i); | |
582 | i += 4; | |
583 | disconnect = aimutil_get32(data+i); | |
584 | i += 4; | |
585 | currentavg = aimutil_get32(data+i); | |
586 | i += 4; | |
587 | maxavg = aimutil_get32(data+i); | |
588 | i += 4; | |
589 | ||
590 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
591 | return userfunc(sess, rx, code, rateclass, windowsize, clear, alert, limit, disconnect, currentavg, maxavg); | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | /* XXX parse this */ | |
597 | static int selfinfo(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
598 | { | |
599 | rxcallback_t userfunc; | |
600 | ||
601 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
602 | return userfunc(sess, rx); | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | static int evilnotify(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
608 | { | |
609 | rxcallback_t userfunc = NULL; | |
610 | int i = 0; | |
611 | unsigned short newevil; | |
612 | struct aim_userinfo_s userinfo; | |
613 | ||
614 | newevil = aimutil_get16(data); | |
615 | i += 2; | |
616 | ||
617 | memset(&userinfo, 0, sizeof(struct aim_userinfo_s)); | |
618 | ||
619 | if (datalen-i) | |
620 | i += aim_extractuserinfo(sess, data+i, &userinfo); | |
621 | ||
622 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
623 | return userfunc(sess, rx, newevil, &userinfo); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | static int motd(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
629 | { | |
630 | rxcallback_t userfunc; | |
631 | char *msg = NULL; | |
632 | int ret = 0; | |
633 | struct aim_tlvlist_t *tlvlist; | |
634 | unsigned short id; | |
635 | ||
636 | /* | |
637 | * Code. | |
638 | * | |
639 | * Valid values: | |
640 | * 1 Mandatory upgrade | |
641 | * 2 Advisory upgrade | |
642 | * 3 System bulletin | |
643 | * 4 Nothing's wrong ("top o the world" -- normal) | |
644 | * | |
645 | */ | |
646 | id = aimutil_get16(data); | |
647 | ||
648 | /* | |
649 | * TLVs follow | |
650 | */ | |
651 | if ((tlvlist = aim_readtlvchain(data+2, datalen-2))) | |
652 | msg = aim_gettlv_str(tlvlist, 0x000b, 1); | |
653 | ||
654 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
655 | ret = userfunc(sess, rx, id, msg); | |
656 | ||
657 | free(msg); | |
658 | ||
659 | aim_freetlvchain(&tlvlist); | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
664 | static int hostversions(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
665 | { | |
666 | rxcallback_t userfunc; | |
667 | int vercount; | |
668 | ||
669 | vercount = datalen/4; | |
670 | ||
671 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
672 | return userfunc(sess, rx, vercount, data); | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
677 | /* | |
678 | * Starting this past week (26 Mar 2001, say), AOL has started sending | |
679 | * this nice little extra SNAC. AFAIK, it has never been used until now. | |
680 | * | |
681 | * The request contains eight bytes. The first four are an offset, the | |
682 | * second four are a length. | |
683 | * | |
684 | * The offset is an offset into aim.exe when it is mapped during execution | |
685 | * on Win32. So far, AOL has only been requesting bytes in static regions | |
686 | * of memory. (I won't put it past them to start requesting data in | |
687 | * less static regions -- regions that are initialized at run time, but still | |
688 | * before the client recieves this request.) | |
689 | * | |
690 | * When the client recieves the request, it adds it to the current ds | |
691 | * (0x00400000) and dereferences it, copying the data into a buffer which | |
692 | * it then runs directly through the MD5 hasher. The 16 byte output of | |
693 | * the hash is then sent back to the server. | |
694 | * | |
695 | * If the client does not send any data back, or the data does not match | |
696 | * the data that the specific client should have, the client will get the | |
697 | * following message from "AOL Instant Messenger": | |
698 | * "You have been disconnected from the AOL Instant Message Service (SM) | |
699 | * for accessing the AOL network using unauthorized software. You can | |
700 | * download a FREE, fully featured, and authorized client, here | |
701 | * http://www.aol.com/aim/download2.html" | |
702 | * The connection is then closed, recieving disconnect code 1, URL | |
703 | * http://www.aim.aol.com/errors/USER_LOGGED_OFF_NEW_LOGIN.html. | |
704 | * | |
705 | * Note, however, that numerous inconsistencies can cause the above error, | |
706 | * not just sending back a bad hash. Do not immediatly suspect this code | |
707 | * if you get disconnected. AOL and the open/free software community have | |
708 | * played this game for a couple years now, generating the above message | |
709 | * on numerous ocassions. | |
710 | * | |
711 | * Anyway, neener. We win again. | |
712 | * | |
713 | */ | |
714 | static int memrequest(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
715 | { | |
716 | rxcallback_t userfunc; | |
717 | unsigned long offset, len; | |
718 | struct aim_tlvlist_t *tlvlist; | |
719 | struct aim_tlv_t *tlv; | |
720 | char *modname; | |
721 | ||
722 | offset = aimutil_get32(data); | |
723 | len = aimutil_get32(data+4); | |
724 | ||
725 | if(rx->commandlen > 0x12) { /* XXX right len? */ | |
726 | tlvlist = aim_readtlvchain(data+8, datalen-8); | |
727 | ||
728 | if((tlv = aim_gettlv(tlvlist, 0x0001, 1))) { | |
729 | modname = malloc(tlv->length + 5); | |
730 | memset(modname, 0, tlv->length + 5); | |
731 | memcpy(modname, tlv->value, tlv->length); | |
732 | strncat(modname, ".ocm", tlv->length + 5 - strlen(modname)); | |
733 | } else { | |
734 | modname = "aim.exe"; | |
735 | } | |
736 | } else | |
737 | modname = "aim.exe"; | |
738 | ||
739 | faimdprintf(sess, 1, "data at 0x%08lx (%d bytes) of %s requested\n", offset, len, modname); | |
740 | ||
741 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) | |
742 | return userfunc(sess, rx, offset, len, modname); | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | faim_export int aim_sendmemblock(struct aim_session_t *sess, struct aim_conn_t *conn, unsigned long offset, unsigned long len, const unsigned char *buf) | |
748 | { | |
749 | struct command_tx_struct *tx; | |
750 | int i = 0; | |
751 | ||
752 | if (!sess || !conn || ((offset == 0) && !buf)) | |
753 | return 0; | |
754 | ||
755 | if (!(tx = aim_tx_new(sess, conn, AIM_FRAMETYPE_OSCAR, 0x0002, 10+2+16))) | |
756 | return -1; | |
757 | ||
758 | tx->lock = 1; | |
759 | ||
760 | i = aim_putsnac(tx->data, 0x0001, 0x0020, 0x0000, sess->snac_nextid++); | |
761 | i += aimutil_put16(tx->data+i, 0x0010); /* md5 is always 16 bytes */ | |
762 | ||
763 | if (buf && (len > 0)) { /* use input buffer */ | |
764 | md5_state_t state; | |
765 | ||
766 | md5_init(&state); | |
767 | md5_append(&state, (const md5_byte_t *)buf, len); | |
768 | md5_finish(&state, (md5_byte_t *)(tx->data+i)); | |
769 | i += 0x10; | |
770 | ||
771 | } else { | |
772 | ||
773 | if ((offset != 0x00001004) || (len != 0x00000004)) | |
774 | faimdprintf(sess, 0, "sendmemblock: WARNING: sending bad hash... you will be disconnected soon...\n"); | |
775 | ||
776 | /* | |
777 | * This data is correct for AIM 3.5.1670, offset 0x1004, length 4 | |
778 | * | |
779 | * Using this block is as close to "legal" as you can get without | |
780 | * using an AIM binary. | |
781 | */ | |
782 | i += aimutil_put32(tx->data+i, 0x92bd6757); | |
783 | i += aimutil_put32(tx->data+i, 0x3722cbd3); | |
784 | i += aimutil_put32(tx->data+i, 0x2b048ab9); | |
785 | i += aimutil_put32(tx->data+i, 0xd0b1e4ab); | |
786 | ||
787 | } | |
788 | ||
789 | tx->commandlen = i; | |
790 | tx->lock = 0; | |
791 | aim_tx_enqueue(sess, tx); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | static int snachandler(struct aim_session_t *sess, aim_module_t *mod, struct command_rx_struct *rx, aim_modsnac_t *snac, unsigned char *data, int datalen) | |
797 | { | |
798 | ||
799 | if (snac->subtype == 0x0003) | |
800 | return hostonline(sess, mod, rx, snac, data, datalen); | |
801 | else if (snac->subtype == 0x0005) | |
802 | return redirect(sess, mod, rx, snac, data, datalen); | |
803 | else if (snac->subtype == 0x0007) | |
804 | return rateresp(sess, mod, rx, snac, data, datalen); | |
805 | else if (snac->subtype == 0x000a) | |
806 | return ratechange(sess, mod, rx, snac, data, datalen); | |
807 | else if (snac->subtype == 0x000f) | |
808 | return selfinfo(sess, mod, rx, snac, data, datalen); | |
809 | else if (snac->subtype == 0x0010) | |
810 | return evilnotify(sess, mod, rx, snac, data, datalen); | |
811 | else if (snac->subtype == 0x0013) | |
812 | return motd(sess, mod, rx, snac, data, datalen); | |
813 | else if (snac->subtype == 0x0018) | |
814 | return hostversions(sess, mod, rx, snac, data, datalen); | |
815 | else if (snac->subtype == 0x001f) | |
816 | return memrequest(sess, mod, rx, snac, data, datalen); | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
821 | faim_internal int general_modfirst(struct aim_session_t *sess, aim_module_t *mod) | |
822 | { | |
823 | ||
824 | mod->family = 0x0001; | |
825 | mod->version = 0x0000; | |
826 | mod->flags = 0; | |
827 | strncpy(mod->name, "general", sizeof(mod->name)); | |
828 | mod->snachandler = snachandler; | |
829 | ||
830 | return 0; | |
831 | } |