source: libfaim/service.c @ f36222f

barnowl_perlaimdebianowlrelease-1.10release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since f36222f was e374dee, checked in by James M. Kretchmar <kretch@mit.edu>, 21 years ago
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[5e53c4a]1/*
[862371b]2 * Family 0x0001 - This is a very special group.  All connections support
[5e53c4a]3 * this group, as it does some particularly good things (like rate limiting).
4 */
5
6#define FAIM_INTERNAL
7#define FAIM_NEED_CONN_INTERNAL
8#include <aim.h>
9
10#include "md5.h"
11
[862371b]12/* Subtype 0x0002 - Client Online */
[5e53c4a]13faim_export int aim_clientready(aim_session_t *sess, aim_conn_t *conn)
14{
15        aim_conn_inside_t *ins = (aim_conn_inside_t *)conn->inside;
16        struct snacgroup *sg;
17        aim_frame_t *fr;
18        aim_snacid_t snacid;
19
20        if (!ins)
21                return -EINVAL;
22
23        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 1152)))
24                return -ENOMEM;
25
26        snacid = aim_cachesnac(sess, 0x0001, 0x0002, 0x0000, NULL, 0);
27        aim_putsnac(&fr->data, 0x0001, 0x0002, 0x0000, snacid);
28
29        /*
30         * Send only the tool versions that the server cares about (that it
31         * marked as supporting in the server ready SNAC). 
32         */
33        for (sg = ins->groups; sg; sg = sg->next) {
34                aim_module_t *mod;
35
36                if ((mod = aim__findmodulebygroup(sess, sg->group))) {
37                        aimbs_put16(&fr->data, mod->family);
38                        aimbs_put16(&fr->data, mod->version);
39                        aimbs_put16(&fr->data, mod->toolid);
40                        aimbs_put16(&fr->data, mod->toolversion);
41                } else
42                        faimdprintf(sess, 1, "aim_clientready: server supports group 0x%04x but we don't!\n", sg->group);
43        }
44
45        aim_tx_enqueue(sess, fr);
46
47        return 0;
48}
49
50/*
[862371b]51 * Subtype 0x0003 - Host Online
[5e53c4a]52 *
53 * See comments in conn.c about how the group associations are supposed
54 * to work, and how they really work.
55 *
56 * This info probably doesn't even need to make it to the client.
57 *
58 * We don't actually call the client here.  This starts off the connection
59 * initialization routine required by all AIM connections.  The next time
60 * the client is called is the CONNINITDONE callback, which should be
61 * shortly after the rate information is acknowledged.
62 *
63 */
64static int hostonline(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
65{
66        fu16_t *families;
67        int famcount;
68
69
70        if (!(families = malloc(aim_bstream_empty(bs))))
71                return 0;
72
73        for (famcount = 0; aim_bstream_empty(bs); famcount++) {
74                families[famcount] = aimbs_get16(bs);
75                aim_conn_addgroup(rx->conn, families[famcount]);
76        }
77
78        free(families);
79
80
81        /*
82         * Next step is in the Host Versions handler.
83         *
84         * Note that we must send this before we request rates, since
85         * the format of the rate information depends on the versions we
86         * give it.
87         *
88         */
89        aim_setversions(sess, rx->conn);
90
91        return 1; 
92}
93
[862371b]94/* Subtype 0x0004 - Service request */
[5e53c4a]95faim_export int aim_reqservice(aim_session_t *sess, aim_conn_t *conn, fu16_t serviceid)
96{
97        return aim_genericreq_s(sess, conn, 0x0001, 0x0004, &serviceid);
98}
99
[862371b]100/* Subtype 0x0005 - Redirect */
[5e53c4a]101static int redirect(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
102{
103        struct aim_redirect_data redir;
104        aim_rxcallback_t userfunc;
105        aim_tlvlist_t *tlvlist;
106        aim_snac_t *origsnac = NULL;
107        int ret = 0;
108
109        memset(&redir, 0, sizeof(redir));
110
111        tlvlist = aim_readtlvchain(bs);
112
113        if (!aim_gettlv(tlvlist, 0x000d, 1) ||
114                        !aim_gettlv(tlvlist, 0x0005, 1) ||
115                        !aim_gettlv(tlvlist, 0x0006, 1)) {
116                aim_freetlvchain(&tlvlist);
117                return 0;
118        }
119
120        redir.group = aim_gettlv16(tlvlist, 0x000d, 1);
121        redir.ip = aim_gettlv_str(tlvlist, 0x0005, 1);
[e374dee]122        redir.cookielen = aim_gettlv(tlvlist, 0x0006, 1)->length;
[5e53c4a]123        redir.cookie = aim_gettlv_str(tlvlist, 0x0006, 1);
124
125        /* Fetch original SNAC so we can get csi if needed */
126        origsnac = aim_remsnac(sess, snac->id);
127
128        if ((redir.group == AIM_CONN_TYPE_CHAT) && origsnac) {
129                struct chatsnacinfo *csi = (struct chatsnacinfo *)origsnac->data;
130
131                redir.chat.exchange = csi->exchange;
132                redir.chat.room = csi->name;
133                redir.chat.instance = csi->instance;
134        }
135
136        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
137                ret = userfunc(sess, rx, &redir);
138
139        free((void *)redir.ip);
140        free((void *)redir.cookie);
141
142        if (origsnac)
143                free(origsnac->data);
144        free(origsnac);
145
146        aim_freetlvchain(&tlvlist);
147
148        return ret;
149}
150
[862371b]151/* Subtype 0x0006 - Request Rate Information. */
[5e53c4a]152faim_internal int aim_reqrates(aim_session_t *sess, aim_conn_t *conn)
153{
154        return aim_genericreq_n(sess, conn, 0x0001, 0x0006);
155}
156
157/*
158 * OSCAR defines several 'rate classes'.  Each class has seperate
159 * rate limiting properties (limit level, alert level, disconnect
160 * level, etc), and a set of SNAC family/type pairs associated with
161 * it.  The rate classes, their limiting properties, and the definitions
162 * of which SNACs are belong to which class, are defined in the
163 * Rate Response packet at login to each host. 
164 *
165 * Logically, all rate offenses within one class count against further
166 * offenses for other SNACs in the same class (ie, sending messages
167 * too fast will limit the number of user info requests you can send,
168 * since those two SNACs are in the same rate class).
169 *
170 * Since the rate classes are defined dynamically at login, the values
171 * below may change. But they seem to be fairly constant.
172 *
173 * Currently, BOS defines five rate classes, with the commonly used
174 * members as follows...
175 *
176 *  Rate class 0x0001:
177 *      - Everything thats not in any of the other classes
178 *
179 *  Rate class 0x0002:
180 *      - Buddy list add/remove
181 *      - Permit list add/remove
182 *      - Deny list add/remove
183 *
184 *  Rate class 0x0003:
185 *      - User information requests
186 *      - Outgoing ICBMs
187 *
188 *  Rate class 0x0004:
189 *      - A few unknowns: 2/9, 2/b, and f/2
190 *
191 *  Rate class 0x0005:
192 *      - Chat room create
193 *      - Outgoing chat ICBMs
194 *
195 * The only other thing of note is that class 5 (chat) has slightly looser
196 * limiting properties than class 3 (normal messages).  But thats just a
197 * small bit of trivia for you.
198 *
199 * The last thing that needs to be learned about the rate limiting
200 * system is how the actual numbers relate to the passing of time.  This
201 * seems to be a big mystery.
202 *
203 */
204
205static void rc_addclass(struct rateclass **head, struct rateclass *inrc)
206{
207        struct rateclass *rc, *rc2;
208
209        if (!(rc = malloc(sizeof(struct rateclass))))
210                return;
211
212        memcpy(rc, inrc, sizeof(struct rateclass));
213        rc->next = NULL;
214
215        for (rc2 = *head; rc2 && rc2->next; rc2 = rc2->next)
216                ;
217
218        if (!rc2)
219                *head = rc;
220        else
221                rc2->next = rc;
222
223        return;
224}
225
226static struct rateclass *rc_findclass(struct rateclass **head, fu16_t id)
227{
228        struct rateclass *rc;
229
230        for (rc = *head; rc; rc = rc->next) {
231                if (rc->classid == id)
232                        return rc;
233        }
234
235        return NULL;
236}
237
238static void rc_addpair(struct rateclass *rc, fu16_t group, fu16_t type)
239{
240        struct snacpair *sp, *sp2;
241
242        if (!(sp = malloc(sizeof(struct snacpair))))
243                return;
244        memset(sp, 0, sizeof(struct snacpair));
245
246        sp->group = group;
247        sp->subtype = type;
248        sp->next = NULL;
249
250        for (sp2 = rc->members; sp2 && sp2->next; sp2 = sp2->next)
251                ;
252
253        if (!sp2)
254                rc->members = sp;
255        else
256                sp2->next = sp;
257
258        return;
259}
260
[862371b]261/* Subtype 0x0007 - Rate Parameters */
[5e53c4a]262static int rateresp(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
263{
264        aim_conn_inside_t *ins = (aim_conn_inside_t *)rx->conn->inside;
265        fu16_t numclasses, i;
266        aim_rxcallback_t userfunc;
267
268
269        /*
270         * First are the parameters for each rate class.
271         */
272        numclasses = aimbs_get16(bs);
273        for (i = 0; i < numclasses; i++) {
274                struct rateclass rc;
275
276                memset(&rc, 0, sizeof(struct rateclass));
277
278                rc.classid = aimbs_get16(bs);
279                rc.windowsize = aimbs_get32(bs);
280                rc.clear = aimbs_get32(bs);
281                rc.alert = aimbs_get32(bs);
282                rc.limit = aimbs_get32(bs);
283                rc.disconnect = aimbs_get32(bs);
284                rc.current = aimbs_get32(bs);
285                rc.max = aimbs_get32(bs);
286
287                /*
288                 * The server will send an extra five bytes of parameters
289                 * depending on the version we advertised in 1/17.  If we
290                 * didn't send 1/17 (evil!), then this will crash and you
291                 * die, as it will default to the old version but we have
292                 * the new version hardcoded here.
293                 */
294                if (mod->version >= 3)
295                        aimbs_getrawbuf(bs, rc.unknown, sizeof(rc.unknown));
296
297                faimdprintf(sess, 1, "--- Adding rate class %d to connection type %d: window size = %ld, clear = %ld, alert = %ld, limit = %ld, disconnect = %ld, current = %ld, max = %ld\n", rx->conn->type, rc.classid, rc.windowsize, rc.clear, rc.alert, rc.limit, rc.disconnect, rc.current, rc.max);
298
299                rc_addclass(&ins->rates, &rc);
300        }
301
302        /*
303         * Then the members of each class.
304         */
305        for (i = 0; i < numclasses; i++) {
306                fu16_t classid, count;
307                struct rateclass *rc;
308                int j;
309
310                classid = aimbs_get16(bs);
311                count = aimbs_get16(bs);
312
313                rc = rc_findclass(&ins->rates, classid);
314
315                for (j = 0; j < count; j++) {
316                        fu16_t group, subtype;
317
318                        group = aimbs_get16(bs);
319                        subtype = aimbs_get16(bs);
320
321                        if (rc)
322                                rc_addpair(rc, group, subtype);
323                }
324        }
325
326        /*
327         * We don't pass the rate information up to the client, as it really
328         * doesn't care.  The information is stored in the connection, however
329         * so that we can do more fun stuff later (not really).
330         */
331
332        /*
333         * Last step in the conn init procedure is to acknowledge that we
334         * agree to these draconian limitations.
335         */
336        aim_rates_addparam(sess, rx->conn);
337
338        /*
339         * Finally, tell the client it's ready to go...
340         */
341        if ((userfunc = aim_callhandler(sess, rx->conn, AIM_CB_FAM_SPECIAL, AIM_CB_SPECIAL_CONNINITDONE)))
342                userfunc(sess, rx);
343
344
345        return 1;
346}
347
[862371b]348/* Subtype 0x0008 - Add Rate Parameter */
[5e53c4a]349faim_internal int aim_rates_addparam(aim_session_t *sess, aim_conn_t *conn)
350{
351        aim_conn_inside_t *ins = (aim_conn_inside_t *)conn->inside;
352        aim_frame_t *fr;       
353        aim_snacid_t snacid;
354        struct rateclass *rc;
355
356        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 512)))
357                return -ENOMEM; 
358
359        snacid = aim_cachesnac(sess, 0x0001, 0x0008, 0x0000, NULL, 0);
360        aim_putsnac(&fr->data, 0x0001, 0x0008, 0x0000, snacid);
361
362        for (rc = ins->rates; rc; rc = rc->next)
363                aimbs_put16(&fr->data, rc->classid);
364
365        aim_tx_enqueue(sess, fr);
366
367        return 0;
368}
369
[862371b]370/* Subtype 0x0009 - Delete Rate Parameter */
[5e53c4a]371faim_internal int aim_rates_delparam(aim_session_t *sess, aim_conn_t *conn)
372{
373        aim_conn_inside_t *ins = (aim_conn_inside_t *)conn->inside;
374        aim_frame_t *fr;       
375        aim_snacid_t snacid;
376        struct rateclass *rc;
377
378        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 512)))
379                return -ENOMEM; 
380
381        snacid = aim_cachesnac(sess, 0x0001, 0x0009, 0x0000, NULL, 0);
382        aim_putsnac(&fr->data, 0x0001, 0x0009, 0x0000, snacid);
383
384        for (rc = ins->rates; rc; rc = rc->next)
385                aimbs_put16(&fr->data, rc->classid);
386
387        aim_tx_enqueue(sess, fr);
388
389        return 0;
390}
391
[862371b]392/* Subtype 0x000a - Rate Change */
[5e53c4a]393static int ratechange(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
394{
[e374dee]395        int ret = 0;
[5e53c4a]396        aim_rxcallback_t userfunc;
397        fu16_t code, rateclass;
398        fu32_t currentavg, maxavg, windowsize, clear, alert, limit, disconnect;
399
400        code = aimbs_get16(bs);
401        rateclass = aimbs_get16(bs);
402       
403        windowsize = aimbs_get32(bs);
404        clear = aimbs_get32(bs);
405        alert = aimbs_get32(bs);
406        limit = aimbs_get32(bs);
407        disconnect = aimbs_get32(bs);
408        currentavg = aimbs_get32(bs);
409        maxavg = aimbs_get32(bs);
410
411        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
[e374dee]412                ret = userfunc(sess, rx, code, rateclass, windowsize, clear, alert, limit, disconnect, currentavg, maxavg);
[5e53c4a]413
[e374dee]414        return ret;
[5e53c4a]415}
416
417/*
[862371b]418 * How Migrations work.
[5e53c4a]419 *
420 * The server sends a Server Pause message, which the client should respond to
421 * with a Server Pause Ack, which contains the families it needs on this
422 * connection. The server will send a Migration Notice with an IP address, and
423 * then disconnect. Next the client should open the connection and send the
424 * cookie.  Repeat the normal login process and pretend this never happened.
425 *
426 * The Server Pause contains no data.
427 *
428 */
429
[862371b]430/* Subtype 0x000b - Service Pause */
[5e53c4a]431static int serverpause(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
432{
[e374dee]433        int ret = 0;
[5e53c4a]434        aim_rxcallback_t userfunc;
435
436        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
[e374dee]437                ret = userfunc(sess, rx);
[5e53c4a]438
[e374dee]439        return ret;
[5e53c4a]440}
441
442/*
[862371b]443 * Subtype 0x000c - Service Pause Acknowledgement
[5e53c4a]444 *
445 * It is rather important that aim_sendpauseack() gets called for the exact
446 * same connection that the Server Pause callback was called for, since
447 * libfaim extracts the data for the SNAC from the connection structure.
448 *
449 * Of course, if you don't do that, more bad things happen than just what
450 * libfaim can cause.
451 *
452 */
453faim_export int aim_sendpauseack(aim_session_t *sess, aim_conn_t *conn)
454{
455        aim_frame_t *fr;
456        aim_snacid_t snacid;
457        aim_conn_inside_t *ins = (aim_conn_inside_t *)conn->inside;
458        struct snacgroup *sg;
459
460        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 1024)))
461                return -ENOMEM;
462
463        snacid = aim_cachesnac(sess, 0x0001, 0x000c, 0x0000, NULL, 0);
464        aim_putsnac(&fr->data, 0x0001, 0x000c, 0x0000, snacid);
465
466        /*
467         * This list should have all the groups that the original
468         * Host Online / Server Ready said this host supports.  And
469         * we want them all back after the migration.
470         */
471        for (sg = ins->groups; sg; sg = sg->next)
472                aimbs_put16(&fr->data, sg->group);
473
474        aim_tx_enqueue(sess, fr);
475
476        return 0;
477}
478
[862371b]479/* Subtype 0x000d - Service Resume */
[5e53c4a]480static int serverresume(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
481{
[e374dee]482        int ret = 0;
[5e53c4a]483        aim_rxcallback_t userfunc;
484
485        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
[e374dee]486                ret = userfunc(sess, rx);
[5e53c4a]487
[e374dee]488        return ret;
[5e53c4a]489}
490
[862371b]491/* Subtype 0x000e - Request self-info */
[5e53c4a]492faim_export int aim_reqpersonalinfo(aim_session_t *sess, aim_conn_t *conn)
493{
494        return aim_genericreq_n(sess, conn, 0x0001, 0x000e);
495}
496
[862371b]497/* Subtype 0x000f - Self User Info */
[5e53c4a]498static int selfinfo(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
499{
[e374dee]500        int ret = 0;
[5e53c4a]501        aim_rxcallback_t userfunc;
502        aim_userinfo_t userinfo;
503
[e374dee]504        aim_info_extract(sess, bs, &userinfo);
[5e53c4a]505
506        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
[e374dee]507                ret = userfunc(sess, rx, &userinfo);
[5e53c4a]508
[e374dee]509        aim_info_free(&userinfo);
510
511        return ret;
[5e53c4a]512}
513
[862371b]514/* Subtype 0x0010 - Evil Notification */
[5e53c4a]515static int evilnotify(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
516{
[e374dee]517        int ret = 0;
[5e53c4a]518        aim_rxcallback_t userfunc;
519        fu16_t newevil;
520        aim_userinfo_t userinfo;
521
522        memset(&userinfo, 0, sizeof(aim_userinfo_t));
523       
524        newevil = aimbs_get16(bs);
525
526        if (aim_bstream_empty(bs))
[e374dee]527                aim_info_extract(sess, bs, &userinfo);
[5e53c4a]528
529        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
[e374dee]530                ret = userfunc(sess, rx, newevil, &userinfo);
[5e53c4a]531
[e374dee]532        aim_info_free(&userinfo);
533
534        return ret;
[5e53c4a]535}
536
537/*
[862371b]538 * Subtype 0x0011 - Idle Notification
[5e53c4a]539 *
540 * Should set your current idle time in seconds.  Note that this should
541 * never be called consecutively with a non-zero idle time.  That makes
542 * OSCAR do funny things.  Instead, just set it once you go idle, and then
543 * call it again with zero when you're back.
544 *
545 */
546faim_export int aim_bos_setidle(aim_session_t *sess, aim_conn_t *conn, fu32_t idletime)
547{
548        return aim_genericreq_l(sess, conn, 0x0001, 0x0011, &idletime);
549}
550
551/*
[862371b]552 * Subtype 0x0012 - Service Migrate
[5e53c4a]553 *
554 * This is the final SNAC sent on the original connection during a migration.
555 * It contains the IP and cookie used to connect to the new server, and
556 * optionally a list of the SNAC groups being migrated.
557 *
558 */
559static int migrate(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
560{
561        aim_rxcallback_t userfunc;
562        int ret = 0;
563        fu16_t groupcount, i;
564        aim_tlvlist_t *tl;
565        char *ip = NULL;
566        aim_tlv_t *cktlv;
567
568        /*
569         * Apparently there's some fun stuff that can happen right here. The
570         * migration can actually be quite selective about what groups it
571         * moves to the new server.  When not all the groups for a connection
572         * are migrated, or they are all migrated but some groups are moved
573         * to a different server than others, it is called a bifurcated
574         * migration.
575         *
576         * Let's play dumb and not support that.
577         *
578         */
579        groupcount = aimbs_get16(bs);
580        for (i = 0; i < groupcount; i++) {
581                fu16_t group;
582
583                group = aimbs_get16(bs);
584
585                faimdprintf(sess, 0, "bifurcated migration unsupported -- group 0x%04x\n", group);
586        }
587
588        tl = aim_readtlvchain(bs);
589
590        if (aim_gettlv(tl, 0x0005, 1))
591                ip = aim_gettlv_str(tl, 0x0005, 1);
592
593        cktlv = aim_gettlv(tl, 0x0006, 1);
594
595        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
596                ret = userfunc(sess, rx, ip, cktlv ? cktlv->value : NULL);
597
598        aim_freetlvchain(&tl);
599        free(ip);
600
601        return ret;
602}
603
[862371b]604/* Subtype 0x0013 - Message of the Day */
[5e53c4a]605static int motd(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
606{
607        aim_rxcallback_t userfunc;
608        char *msg = NULL;
609        int ret = 0;
610        aim_tlvlist_t *tlvlist;
611        fu16_t id;
612
613        /*
614         * Code.
615         *
616         * Valid values:
617         *   1 Mandatory upgrade
618         *   2 Advisory upgrade
619         *   3 System bulletin
620         *   4 Nothing's wrong ("top o the world" -- normal)
621         *   5 Lets-break-something.
622         *
623         */
624        id = aimbs_get16(bs);
625
626        /*
627         * TLVs follow
628         */
629        tlvlist = aim_readtlvchain(bs);
630
631        msg = aim_gettlv_str(tlvlist, 0x000b, 1);
632
633        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
634                ret = userfunc(sess, rx, id, msg);
635
636        free(msg);
637
638        aim_freetlvchain(&tlvlist);
639
640        return ret;
641}
642
643/*
[862371b]644 * Subtype 0x0014 - Set privacy flags
[5e53c4a]645 *
646 * Normally 0x03.
647 *
648 *  Bit 1:  Allows other AIM users to see how long you've been idle.
649 *  Bit 2:  Allows other AIM users to see how long you've been a member.
650 *
651 */
652faim_export int aim_bos_setprivacyflags(aim_session_t *sess, aim_conn_t *conn, fu32_t flags)
653{
654        return aim_genericreq_l(sess, conn, 0x0001, 0x0014, &flags);
655}
656
657/*
[862371b]658 * Subtype 0x0016 - No-op
[5e53c4a]659 *
660 * WinAIM sends these every 4min or so to keep the connection alive.  Its not
[862371b]661 * really necessary.
[5e53c4a]662 *
663 */
664faim_export int aim_nop(aim_session_t *sess, aim_conn_t *conn)
665{
666        return aim_genericreq_n(sess, conn, 0x0001, 0x0016);
667}
668
669/*
[862371b]670 * Subtype 0x0017 - Set client versions
[5e53c4a]671 *
672 * If you've seen the clientonline/clientready SNAC you're probably
673 * wondering what the point of this one is.  And that point seems to be
674 * that the versions in the client online SNAC are sent too late for the
675 * server to be able to use them to change the protocol for the earlier
676 * login packets (client versions are sent right after Host Online is
677 * received, but client online versions aren't sent until quite a bit later).
678 * We can see them already making use of this by changing the format of
679 * the rate information based on what version of group 1 we advertise here.
680 *
681 */
682faim_internal int aim_setversions(aim_session_t *sess, aim_conn_t *conn)
683{
684        aim_conn_inside_t *ins = (aim_conn_inside_t *)conn->inside;
685        struct snacgroup *sg;
686        aim_frame_t *fr;
687        aim_snacid_t snacid;
688
689        if (!ins)
690                return -EINVAL;
691
692        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 1152)))
693                return -ENOMEM;
694
695        snacid = aim_cachesnac(sess, 0x0001, 0x0017, 0x0000, NULL, 0);
696        aim_putsnac(&fr->data, 0x0001, 0x0017, 0x0000, snacid);
697
698        /*
699         * Send only the versions that the server cares about (that it
700         * marked as supporting in the server ready SNAC). 
701         */
702        for (sg = ins->groups; sg; sg = sg->next) {
703                aim_module_t *mod;
704
705                if ((mod = aim__findmodulebygroup(sess, sg->group))) {
706                        aimbs_put16(&fr->data, mod->family);
707                        aimbs_put16(&fr->data, mod->version);
708                } else
709                        faimdprintf(sess, 1, "aim_setversions: server supports group 0x%04x but we don't!\n", sg->group);
710        }
711
712        aim_tx_enqueue(sess, fr);
713
714        return 0;
715}
716
[862371b]717/* Subtype 0x0018 - Host versions */
[5e53c4a]718static int hostversions(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
719{
720        int vercount;
721        fu8_t *versions;
722
723        /* This is frivolous. (Thank you SmarterChild.) */
724        vercount = aim_bstream_empty(bs)/4;
725        versions = aimbs_getraw(bs, aim_bstream_empty(bs));
726        free(versions);
727
728        /*
729         * Now request rates.
730         */
731        aim_reqrates(sess, rx->conn);
732
733        return 1;
734}
735
736/*
[e374dee]737 * Subtype 0x001e - Extended Status
[5e53c4a]738 *
[e374dee]739 * Sets your ICQ status (available, away, do not disturb, etc.)
[5e53c4a]740 *
[e374dee]741 * These are the same TLVs seen in user info.  You can
742 * also set 0x0008 and 0x000c.
[5e53c4a]743 */
[e374dee]744faim_export int aim_setextstatus(aim_session_t *sess, fu32_t status)
[5e53c4a]745{
[e374dee]746        aim_conn_t *conn;
[5e53c4a]747        aim_frame_t *fr;
748        aim_snacid_t snacid;
749        aim_tlvlist_t *tl = NULL;
750        fu32_t data;
751
[e374dee]752        if (!sess || !(conn = aim_conn_findbygroup(sess, 0x0004)))
753                return -EINVAL;
754
755        data = AIM_ICQ_STATE_HIDEIP | AIM_ICQ_STATE_WEBAWARE | status; /* yay for error checking ;^) */
[5e53c4a]756
757        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10 + 8)))
758                return -ENOMEM;
759
760        snacid = aim_cachesnac(sess, 0x0001, 0x001e, 0x0000, NULL, 0);
761        aim_putsnac(&fr->data, 0x0001, 0x001e, 0x0000, snacid);
762       
763        aim_addtlvtochain32(&tl, 0x0006, data);
764        aim_writetlvchain(&fr->data, &tl);
765        aim_freetlvchain(&tl);
766       
767        aim_tx_enqueue(sess, fr);
768
769        return 0;
770}
771
[e374dee]772/*
773 * Subtype 0x001e - Extended Status.
774 *
775 * Sets your "available" message.  This is currently only supported by iChat
776 * and Gaim.
777 *
778 * These are the same TLVs seen in user info.  You can
779 * also set 0x0008 and 0x000c.
780 */
781faim_export int aim_srv_setavailmsg(aim_session_t *sess, char *msg)
782{
783        aim_conn_t *conn;
784        aim_frame_t *fr;
785        aim_snacid_t snacid;
786
787        if (!sess || !(conn = aim_conn_findbygroup(sess, 0x0001)))
788                return -EINVAL;
789
790        if (msg) {
791                if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10 + 4 + strlen(msg) + 8)))
792                        return -ENOMEM;
793
794                snacid = aim_cachesnac(sess, 0x0001, 0x001e, 0x0000, NULL, 0);
795                aim_putsnac(&fr->data, 0x0001, 0x001e, 0x0000, snacid);
796
797                aimbs_put16(&fr->data, 0x001d);
798                aimbs_put16(&fr->data, strlen(msg)+8);
799                aimbs_put16(&fr->data, 0x0002);
800                aimbs_put8(&fr->data, 0x04);
801                aimbs_put8(&fr->data, strlen(msg)+4);
802                aimbs_put16(&fr->data, strlen(msg));
803                aimbs_putraw(&fr->data, msg, strlen(msg));
804                aimbs_put16(&fr->data, 0x0000);
805        } else {
806                if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10 + 4 + 8)))
807                        return -ENOMEM;
808
809                snacid = aim_cachesnac(sess, 0x0001, 0x001e, 0x0000, NULL, 0);
810                aim_putsnac(&fr->data, 0x0001, 0x001e, 0x0000, snacid);
811
812                aimbs_put16(&fr->data, 0x001d);
813                aimbs_put16(&fr->data, 0x0008);
814                aimbs_put16(&fr->data, 0x0002);
815                aimbs_put16(&fr->data, 0x0404);
816                aimbs_put16(&fr->data, 0x0000);
817                aimbs_put16(&fr->data, 0x0000);
818        }
819
820        aim_tx_enqueue(sess, fr);
821
822        return 0;
823}
824
[5e53c4a]825/*
826 * Starting this past week (26 Mar 2001, say), AOL has started sending
827 * this nice little extra SNAC.  AFAIK, it has never been used until now.
828 *
829 * The request contains eight bytes.  The first four are an offset, the
830 * second four are a length.
831 *
832 * The offset is an offset into aim.exe when it is mapped during execution
833 * on Win32.  So far, AOL has only been requesting bytes in static regions
834 * of memory.  (I won't put it past them to start requesting data in
835 * less static regions -- regions that are initialized at run time, but still
836 * before the client recieves this request.)
837 *
838 * When the client recieves the request, it adds it to the current ds
839 * (0x00400000) and dereferences it, copying the data into a buffer which
840 * it then runs directly through the MD5 hasher.  The 16 byte output of
841 * the hash is then sent back to the server.
842 *
843 * If the client does not send any data back, or the data does not match
844 * the data that the specific client should have, the client will get the
845 * following message from "AOL Instant Messenger":
846 *    "You have been disconnected from the AOL Instant Message Service (SM)
847 *     for accessing the AOL network using unauthorized software.  You can
848 *     download a FREE, fully featured, and authorized client, here
849 *     http://www.aol.com/aim/download2.html"
850 * The connection is then closed, recieving disconnect code 1, URL
851 * http://www.aim.aol.com/errors/USER_LOGGED_OFF_NEW_LOGIN.html. 
852 *
853 * Note, however, that numerous inconsistencies can cause the above error,
854 * not just sending back a bad hash.  Do not immediatly suspect this code
855 * if you get disconnected.  AOL and the open/free software community have
856 * played this game for a couple years now, generating the above message
857 * on numerous ocassions.
858 *
859 * Anyway, neener.  We win again.
860 *
861 */
[862371b]862/* Subtype 0x001f - Client verification */
[5e53c4a]863static int memrequest(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
864{
[e374dee]865        int ret = 0;
[5e53c4a]866        aim_rxcallback_t userfunc;
867        fu32_t offset, len;
868        aim_tlvlist_t *list;
869        char *modname;
870
871        offset = aimbs_get32(bs);
872        len = aimbs_get32(bs);
873        list = aim_readtlvchain(bs);
874
875        modname = aim_gettlv_str(list, 0x0001, 1);
876
877        faimdprintf(sess, 1, "data at 0x%08lx (%d bytes) of requested\n", offset, len, modname ? modname : "aim.exe");
878
879        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
[e374dee]880                ret = userfunc(sess, rx, offset, len, modname);
[5e53c4a]881
882        free(modname);
883        aim_freetlvchain(&list);
884
[e374dee]885        return ret;
[5e53c4a]886}
887
[862371b]888#if 0
[5e53c4a]889static void dumpbox(aim_session_t *sess, unsigned char *buf, int len)
890{
891        int i;
892
893        if (!sess || !buf || !len)
894                return;
895
896        faimdprintf(sess, 1, "\nDump of %d bytes at %p:", len, buf);
897
898        for (i = 0; i < len; i++) {
899                if ((i % 8) == 0)
900                        faimdprintf(sess, 1, "\n\t");
901
902                faimdprintf(sess, 1, "0x%2x ", buf[i]);
903        }
904
905        faimdprintf(sess, 1, "\n\n");
906
907        return;
908}
909#endif
910
[862371b]911/* Subtype 0x0020 - Client verification reply */
[5e53c4a]912faim_export int aim_sendmemblock(aim_session_t *sess, aim_conn_t *conn, fu32_t offset, fu32_t len, const fu8_t *buf, fu8_t flag)
913{
914        aim_frame_t *fr;
915        aim_snacid_t snacid;
916
917        if (!sess || !conn)
918                return -EINVAL;
919
920        if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10+2+16)))
921                return -ENOMEM;
922
923        snacid = aim_cachesnac(sess, 0x0001, 0x0020, 0x0000, NULL, 0);
924
925        aim_putsnac(&fr->data, 0x0001, 0x0020, 0x0000, snacid);
926        aimbs_put16(&fr->data, 0x0010); /* md5 is always 16 bytes */
927
928        if ((flag == AIM_SENDMEMBLOCK_FLAG_ISHASH) && buf && (len == 0x10)) { /* we're getting a hash */
929
930                aimbs_putraw(&fr->data, buf, 0x10); 
931
932        } else if (buf && (len > 0)) { /* use input buffer */
933                md5_state_t state;
934                md5_byte_t digest[0x10];
935
936                md5_init(&state);       
937                md5_append(&state, (const md5_byte_t *)buf, len);
938                md5_finish(&state, digest);
939
940                aimbs_putraw(&fr->data, (fu8_t *)digest, 0x10);
941
942        } else if (len == 0) { /* no length, just hash NULL (buf is optional) */
943                md5_state_t state;
944                fu8_t nil = '\0';
945                md5_byte_t digest[0x10];
946
947                /*
948                 * These MD5 routines are stupid in that you have to have
949                 * at least one append.  So thats why this doesn't look
950                 * real logical.
951                 */
952                md5_init(&state);
953                md5_append(&state, (const md5_byte_t *)&nil, 0);
954                md5_finish(&state, digest);
955
956                aimbs_putraw(&fr->data, (fu8_t *)digest, 0x10);
957
958        } else {
959
960                /*
961                 * This data is correct for AIM 3.5.1670.
962                 *
963                 * Using these blocks is as close to "legal" as you can get
964                 * without using an AIM binary.
965                 *
966                 */
967                if ((offset == 0x03ffffff) && (len == 0x03ffffff)) {
968
969#if 1 /* with "AnrbnrAqhfzcd" */
970                        aimbs_put32(&fr->data, 0x44a95d26);
971                        aimbs_put32(&fr->data, 0xd2490423);
972                        aimbs_put32(&fr->data, 0x93b8821f);
973                        aimbs_put32(&fr->data, 0x51c54b01);
974#else /* no filename */
975                        aimbs_put32(&fr->data, 0x1df8cbae);
976                        aimbs_put32(&fr->data, 0x5523b839);
977                        aimbs_put32(&fr->data, 0xa0e10db3);
978                        aimbs_put32(&fr->data, 0xa46d3b39);
979#endif
980
981                } else if ((offset == 0x00001000) && (len == 0x00000000)) {
982
983                        aimbs_put32(&fr->data, 0xd41d8cd9);
984                        aimbs_put32(&fr->data, 0x8f00b204);
985                        aimbs_put32(&fr->data, 0xe9800998);
986                        aimbs_put32(&fr->data, 0xecf8427e);
987
988                } else
989                        faimdprintf(sess, 0, "sendmemblock: WARNING: unknown hash request\n");
990
991        }
992
993        aim_tx_enqueue(sess, fr);
994
995        return 0;
996}
997
[e374dee]998/*
999 * Subtype 0x0021 - Receive our extended status
1000 *
1001 * This is used for iChat's "available" messages, and maybe ICQ extended
1002 * status messages?  It's also used to tell the client whether or not it
1003 * needs to upload an SSI buddy icon... who engineers this stuff, anyway?
1004 */
1005static int aim_parse_extstatus(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
1006{
1007        int ret = 0;
1008        aim_rxcallback_t userfunc;
1009        fu16_t type;
1010        fu8_t flags, length;
1011
1012        type = aimbs_get16(bs); 
1013        flags = aimbs_get8(bs);
1014        length = aimbs_get8(bs);
1015
1016        if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) {
1017                switch (type) {
1018                case 0x0000:
1019                case 0x0001: { /* buddy icon checksum */
1020                        /* not sure what the difference between 1 and 0 is */
1021                        fu8_t *md5 = aimbs_getraw(bs, length);
1022                        ret = userfunc(sess, rx, type, flags, length, md5);
1023                        free(md5);
1024                        } break;
1025                case 0x0002: { /* available message */
1026                        /* there is a second length that is just for the message */
1027                        char *msg = aimbs_getstr(bs, aimbs_get16(bs));
1028                        ret = userfunc(sess, rx, msg);
1029                        free(msg);
1030                        } break;
1031                }
1032        }
1033
1034        return ret;
1035}
1036
[5e53c4a]1037static int snachandler(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
1038{
1039
1040        if (snac->subtype == 0x0003)
1041                return hostonline(sess, mod, rx, snac, bs);
1042        else if (snac->subtype == 0x0005)
1043                return redirect(sess, mod, rx, snac, bs);
1044        else if (snac->subtype == 0x0007)
1045                return rateresp(sess, mod, rx, snac, bs);
1046        else if (snac->subtype == 0x000a)
1047                return ratechange(sess, mod, rx, snac, bs);
1048        else if (snac->subtype == 0x000b)
1049                return serverpause(sess, mod, rx, snac, bs);
1050        else if (snac->subtype == 0x000d)
1051                return serverresume(sess, mod, rx, snac, bs);
1052        else if (snac->subtype == 0x000f)
1053                return selfinfo(sess, mod, rx, snac, bs);
1054        else if (snac->subtype == 0x0010)
1055                return evilnotify(sess, mod, rx, snac, bs);
1056        else if (snac->subtype == 0x0012)
1057                return migrate(sess, mod, rx, snac, bs);
1058        else if (snac->subtype == 0x0013)
1059                return motd(sess, mod, rx, snac, bs);
1060        else if (snac->subtype == 0x0018)
1061                return hostversions(sess, mod, rx, snac, bs);
1062        else if (snac->subtype == 0x001f)
1063                return memrequest(sess, mod, rx, snac, bs);
[e374dee]1064        else if (snac->subtype == 0x0021)
1065                return aim_parse_extstatus(sess, mod, rx, snac, bs);
[5e53c4a]1066
1067        return 0;
1068}
1069
1070faim_internal int general_modfirst(aim_session_t *sess, aim_module_t *mod)
1071{
1072
1073        mod->family = 0x0001;
1074        mod->version = 0x0003;
1075        mod->toolid = 0x0110;
[e374dee]1076        mod->toolversion = 0x0629;
[5e53c4a]1077        mod->flags = 0;
1078        strncpy(mod->name, "general", sizeof(mod->name));
1079        mod->snachandler = snachandler;
1080
1081        return 0;
1082}
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