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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_server.c: Introduces a server. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | * $Id: m_server.c 3291 2007-03-28 14:30:10Z jilles $ | |
25 | */ | |
26 | ||
27 | #include "stdinc.h" | |
28 | #include "client.h" /* client struct */ | |
29 | #include "common.h" /* TRUE bleah */ | |
30 | #include "hash.h" /* add_to_client_hash */ | |
31 | #include "irc_string.h" | |
32 | #include "ircd.h" /* me */ | |
33 | #include "numeric.h" /* ERR_xxx */ | |
34 | #include "s_conf.h" /* struct ConfItem */ | |
35 | #include "s_newconf.h" | |
36 | #include "logger.h" /* log level defines */ | |
37 | #include "s_serv.h" /* server_estab, check_server */ | |
38 | #include "s_stats.h" /* ServerStats */ | |
39 | #include "scache.h" | |
40 | #include "send.h" /* sendto_one */ | |
41 | #include "msg.h" | |
42 | #include "parse.h" | |
43 | #include "modules.h" | |
44 | ||
45 | static int mr_server(struct Client *, struct Client *, int, const char **); | |
46 | static int ms_server(struct Client *, struct Client *, int, const char **); | |
47 | static int ms_sid(struct Client *, struct Client *, int, const char **); | |
48 | ||
49 | struct Message server_msgtab = { | |
50 | "SERVER", 0, 0, 0, MFLG_SLOW | MFLG_UNREG, | |
51 | {{mr_server, 4}, mg_reg, mg_ignore, {ms_server, 4}, mg_ignore, mg_reg} | |
52 | }; | |
53 | struct Message sid_msgtab = { | |
54 | "SID", 0, 0, 0, MFLG_SLOW, | |
55 | {mg_ignore, mg_reg, mg_ignore, {ms_sid, 5}, mg_ignore, mg_reg} | |
56 | }; | |
57 | ||
58 | mapi_clist_av1 server_clist[] = { &server_msgtab, &sid_msgtab, NULL }; | |
59 | ||
60 | DECLARE_MODULE_AV1(server, NULL, NULL, server_clist, NULL, NULL, "$Revision: 3291 $"); | |
61 | ||
62 | int bogus_host(const char *host); | |
63 | static int set_server_gecos(struct Client *, const char *); | |
64 | ||
65 | /* | |
66 | * mr_server - SERVER message handler | |
67 | * parv[0] = sender prefix | |
68 | * parv[1] = servername | |
69 | * parv[2] = serverinfo/hopcount | |
70 | * parv[3] = serverinfo | |
71 | */ | |
72 | static int | |
73 | mr_server(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
74 | { | |
75 | char info[REALLEN + 1]; | |
76 | const char *name; | |
77 | struct Client *target_p; | |
78 | int hop; | |
79 | ||
80 | name = parv[1]; | |
81 | hop = atoi(parv[2]); | |
82 | strlcpy(info, parv[3], sizeof(info)); | |
83 | ||
84 | if (IsHandshake(client_p) && irccmp(client_p->name, name)) | |
85 | { | |
86 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
87 | "Server %s has unexpected name %s", | |
88 | get_server_name(client_p, HIDE_IP), name); | |
89 | ilog(L_SERVER, "Server %s has unexpected name %s", | |
90 | log_client_name(client_p, SHOW_IP), name); | |
91 | exit_client(client_p, client_p, client_p, "Server name mismatch"); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | /* | |
96 | * Reject a direct nonTS server connection if we're TS_ONLY -orabidoo | |
97 | */ | |
98 | if(!DoesTS(client_p)) | |
99 | { | |
100 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Link %s dropped, non-TS server", | |
101 | get_server_name(client_p, HIDE_IP)); | |
102 | exit_client(client_p, client_p, client_p, "Non-TS server"); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | if(bogus_host(name)) | |
107 | { | |
108 | exit_client(client_p, client_p, client_p, "Bogus server name"); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | /* Now we just have to call check_server and everything should be | |
113 | * check for us... -A1kmm. */ | |
114 | switch (check_server(name, client_p)) | |
115 | { | |
116 | case -1: | |
117 | if(ConfigFileEntry.warn_no_nline) | |
118 | { | |
119 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
120 | "Unauthorised server connection attempt from %s: " | |
121 | "No entry for servername %s", | |
122 | get_server_name(client_p, HIDE_IP), name); | |
123 | ||
124 | ilog(L_SERVER, "Access denied, no connect block for server %s%s", | |
125 | EmptyString(client_p->name) ? name : "", | |
126 | log_client_name(client_p, SHOW_IP)); | |
127 | } | |
128 | ||
129 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
130 | return 0; | |
131 | /* NOT REACHED */ | |
132 | break; | |
133 | ||
134 | case -2: | |
135 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
136 | "Unauthorised server connection attempt from %s: " | |
137 | "Bad password for server %s", | |
138 | get_server_name(client_p, HIDE_IP), name); | |
139 | ||
140 | ilog(L_SERVER, "Access denied, invalid password for server %s%s", | |
141 | EmptyString(client_p->name) ? name : "", | |
142 | log_client_name(client_p, SHOW_IP)); | |
143 | ||
144 | exit_client(client_p, client_p, client_p, "Invalid password."); | |
145 | return 0; | |
146 | /* NOT REACHED */ | |
147 | break; | |
148 | ||
149 | case -3: | |
150 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
151 | "Unauthorised server connection attempt from %s: " | |
152 | "Invalid host for server %s", | |
153 | get_server_name(client_p, HIDE_IP), name); | |
154 | ||
155 | ilog(L_SERVER, "Access denied, invalid host for server %s%s", | |
156 | EmptyString(client_p->name) ? name : "", | |
157 | log_client_name(client_p, SHOW_IP)); | |
158 | ||
159 | exit_client(client_p, client_p, client_p, "Invalid host."); | |
160 | return 0; | |
161 | /* NOT REACHED */ | |
162 | break; | |
163 | ||
164 | /* servername is > HOSTLEN */ | |
165 | case -4: | |
166 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
167 | "Invalid servername %s from %s", | |
168 | name, get_server_name(client_p, HIDE_IP)); | |
169 | ilog(L_SERVER, "Access denied, invalid servername from %s", | |
170 | log_client_name(client_p, SHOW_IP)); | |
171 | ||
172 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
173 | return 0; | |
174 | /* NOT REACHED */ | |
175 | break; | |
176 | case -5: | |
177 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
178 | "Connection from servername %s requires SSL/TLS but is plaintext", | |
179 | name); | |
180 | ilog(L_SERVER, "Access denied, requires SSL/TLS but is plaintext from %s", | |
181 | log_client_name(client_p, SHOW_IP)); | |
182 | ||
183 | exit_client(client_p, client_p, client_p, "Access denied, requires SSL/TLS but is plaintext"); | |
184 | return 0; | |
185 | } | |
186 | ||
187 | if((target_p = find_server(NULL, name))) | |
188 | { | |
189 | /* | |
190 | * This link is trying feed me a server that I already have | |
191 | * access through another path -- multiple paths not accepted | |
192 | * currently, kill this link immediately!! | |
193 | * | |
194 | * Rather than KILL the link which introduced it, KILL the | |
195 | * youngest of the two links. -avalon | |
196 | * | |
197 | * Definitely don't do that here. This is from an unregistered | |
198 | * connect - A1kmm. | |
199 | */ | |
200 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
201 | "Attempt to re-introduce server %s from %s", | |
202 | name, get_server_name(client_p, HIDE_IP)); | |
203 | ilog(L_SERVER, "Attempt to re-introduce server %s from %s", | |
204 | name, log_client_name(client_p, SHOW_IP)); | |
205 | ||
206 | sendto_one(client_p, "ERROR :Server already exists."); | |
207 | exit_client(client_p, client_p, client_p, "Server Exists"); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | if(has_id(client_p) && (target_p = find_id(client_p->id)) != NULL) | |
212 | { | |
213 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
214 | "Attempt to re-introduce SID %s from %s%s", | |
215 | client_p->id, | |
216 | EmptyString(client_p->name) ? name : "", | |
217 | get_server_name(client_p, HIDE_IP)); | |
218 | ilog(L_SERVER, "Attempt to re-introduce SID %s from %s%s", | |
219 | client_p->id, | |
220 | EmptyString(client_p->name) ? name : "", | |
221 | log_client_name(client_p, SHOW_IP)); | |
222 | ||
223 | sendto_one(client_p, "ERROR :SID already exists."); | |
224 | exit_client(client_p, client_p, client_p, "SID Exists"); | |
225 | return 0; | |
226 | } | |
227 | ||
228 | /* | |
229 | * if we are connecting (Handshake), we already have the name from the | |
230 | * C:line in client_p->name | |
231 | */ | |
232 | ||
233 | strlcpy(client_p->name, name, sizeof(client_p->name)); | |
234 | set_server_gecos(client_p, info); | |
235 | client_p->hopcount = hop; | |
236 | server_estab(client_p); | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | /* | |
242 | * ms_server - SERVER message handler | |
243 | * parv[0] = sender prefix | |
244 | * parv[1] = servername | |
245 | * parv[2] = serverinfo/hopcount | |
246 | * parv[3] = serverinfo | |
247 | */ | |
248 | static int | |
249 | ms_server(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
250 | { | |
251 | char info[REALLEN + 1]; | |
252 | /* same size as in s_misc.c */ | |
253 | const char *name; | |
254 | struct Client *target_p; | |
255 | struct remote_conf *hub_p; | |
256 | hook_data_client hdata; | |
257 | int hop; | |
258 | int hlined = 0; | |
259 | int llined = 0; | |
260 | rb_dlink_node *ptr; | |
261 | ||
262 | name = parv[1]; | |
263 | hop = atoi(parv[2]); | |
264 | strlcpy(info, parv[3], sizeof(info)); | |
265 | ||
266 | if((target_p = find_server(NULL, name))) | |
267 | { | |
268 | /* | |
269 | * This link is trying feed me a server that I already have | |
270 | * access through another path -- multiple paths not accepted | |
271 | * currently, kill this link immediately!! | |
272 | * | |
273 | * Rather than KILL the link which introduced it, KILL the | |
274 | * youngest of the two links. -avalon | |
275 | * | |
276 | * I think that we should exit the link itself, not the introducer, | |
277 | * and we should always exit the most recently received(i.e. the | |
278 | * one we are receiving this SERVER for. -A1kmm | |
279 | * | |
280 | * You *cant* do this, if you link somewhere, it bursts you a server | |
281 | * that already exists, then sends you a client burst, you squit the | |
282 | * server, but you keep getting the burst of clients on a server that | |
283 | * doesnt exist, although ircd can handle it, its not a realistic | |
284 | * solution.. --fl_ | |
285 | */ | |
286 | /* It is behind a host-masked server. Completely ignore the | |
287 | * server message(don't propagate or we will delink from whoever | |
288 | * we propagate to). -A1kmm */ | |
289 | if(irccmp(target_p->name, name) && target_p->from == client_p) | |
290 | return 0; | |
291 | ||
292 | sendto_one(client_p, "ERROR :Server %s already exists", name); | |
293 | ||
294 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
295 | "Link %s cancelled, server %s already exists", | |
296 | get_server_name(client_p, SHOW_IP), name); | |
297 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", | |
298 | client_p->name, name); | |
299 | ||
300 | exit_client(client_p, client_p, &me, "Server Exists"); | |
301 | return 0; | |
302 | } | |
303 | ||
304 | /* | |
305 | * User nicks never have '.' in them and server names | |
306 | * must always have '.' in them. | |
307 | */ | |
308 | if(strchr(name, '.') == NULL) | |
309 | { | |
310 | /* | |
311 | * Server trying to use the same name as a person. Would | |
312 | * cause a fair bit of confusion. Enough to make it hellish | |
313 | * for a while and servers to send stuff to the wrong place. | |
314 | */ | |
315 | sendto_one(client_p, "ERROR :Nickname %s already exists!", name); | |
316 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
317 | "Link %s cancelled: Server/nick collision on %s", | |
318 | get_server_name(client_p, HIDE_IP), name); | |
319 | ilog(L_SERVER, "Link %s cancelled: Server/nick collision on %s", | |
320 | client_p->name, name); | |
321 | ||
322 | exit_client(client_p, client_p, client_p, "Nick as Server"); | |
323 | return 0; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Server is informing about a new server behind | |
328 | * this link. Create REMOTE server structure, | |
329 | * add it to list and propagate word to my other | |
330 | * server links... | |
331 | */ | |
332 | if(parc == 1 || EmptyString(info)) | |
333 | { | |
334 | sendto_one(client_p, "ERROR :No server info specified for %s", name); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | /* | |
339 | * See if the newly found server is behind a guaranteed | |
340 | * leaf. If so, close the link. | |
341 | * | |
342 | */ | |
343 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) | |
344 | { | |
345 | hub_p = ptr->data; | |
346 | ||
347 | if(match(hub_p->server, client_p->name) && match(hub_p->host, name)) | |
348 | { | |
349 | if(hub_p->flags & CONF_HUB) | |
350 | hlined++; | |
351 | else | |
352 | llined++; | |
353 | } | |
354 | } | |
355 | ||
356 | /* Ok, this way this works is | |
357 | * | |
358 | * A server can have a CONF_HUB allowing it to introduce servers | |
359 | * behind it. | |
360 | * | |
361 | * connect { | |
362 | * name = "irc.bighub.net"; | |
363 | * hub_mask="*"; | |
364 | * ... | |
365 | * | |
366 | * That would allow "irc.bighub.net" to introduce anything it wanted.. | |
367 | * | |
368 | * However | |
369 | * | |
370 | * connect { | |
371 | * name = "irc.somehub.fi"; | |
372 | * hub_mask="*"; | |
373 | * leaf_mask="*.edu"; | |
374 | *... | |
375 | * Would allow this server in finland to hub anything but | |
376 | * .edu's | |
377 | */ | |
378 | ||
379 | /* Ok, check client_p can hub the new server, and make sure it's not a LL */ | |
380 | if(!hlined) | |
381 | { | |
382 | /* OOOPs nope can't HUB */ | |
383 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Non-Hub link %s introduced %s.", | |
384 | get_server_name(client_p, HIDE_IP), name); | |
385 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", | |
386 | client_p->name, name); | |
387 | ||
388 | exit_client(NULL, client_p, &me, "No matching hub_mask."); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | /* Check for the new server being leafed behind this HUB */ | |
393 | if(llined) | |
394 | { | |
395 | /* OOOPs nope can't HUB this leaf */ | |
396 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
397 | "Link %s introduced leafed server %s.", | |
398 | get_server_name(client_p, HIDE_IP), name); | |
399 | ilog(L_SERVER, "Link %s introduced leafed server %s.", | |
400 | client_p->name, name); | |
401 | ||
402 | exit_client(NULL, client_p, &me, "Leafed Server."); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | ||
407 | ||
408 | if(strlen(name) > HOSTLEN) | |
409 | { | |
410 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
411 | "Link %s introduced server with invalid servername %s", | |
412 | get_server_name(client_p, HIDE_IP), name); | |
413 | ilog(L_SERVER, "Link %s introduced server with invalid servername %s", | |
414 | client_p->name, name); | |
415 | ||
416 | exit_client(NULL, client_p, &me, "Invalid servername introduced."); | |
417 | return 0; | |
418 | } | |
419 | ||
420 | target_p = make_client(client_p); | |
421 | make_server(target_p); | |
422 | target_p->hopcount = hop; | |
423 | ||
424 | strlcpy(target_p->name, name, sizeof(target_p->name)); | |
425 | ||
426 | set_server_gecos(target_p, info); | |
427 | ||
428 | target_p->servptr = source_p; | |
429 | ||
430 | SetServer(target_p); | |
431 | ||
432 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); | |
433 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
434 | add_to_client_hash(target_p->name, target_p); | |
435 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); | |
436 | ||
437 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); | |
438 | ||
439 | sendto_server(client_p, NULL, NOCAPS, NOCAPS, | |
440 | ":%s SERVER %s %d :%s%s", | |
441 | source_p->name, target_p->name, target_p->hopcount + 1, | |
442 | IsHidden(target_p) ? "(H) " : "", target_p->info); | |
443 | ||
444 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
445 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
446 | ||
447 | /* quick, dirty EOB. you know you love it. */ | |
448 | sendto_one(target_p, ":%s PING %s %s", get_id(&me, target_p), me.name, target_p->name); | |
449 | ||
450 | hdata.client = source_p; | |
451 | hdata.target = target_p; | |
452 | call_hook(h_server_introduced, &hdata); | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | static int | |
458 | ms_sid(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
459 | { | |
460 | struct Client *target_p; | |
461 | struct remote_conf *hub_p; | |
462 | hook_data_client hdata; | |
463 | rb_dlink_node *ptr; | |
464 | int hop; | |
465 | int hlined = 0; | |
466 | int llined = 0; | |
467 | ||
468 | hop = atoi(parv[2]); | |
469 | ||
470 | /* collision on the name? */ | |
471 | if((target_p = find_server(NULL, parv[1])) != NULL) | |
472 | { | |
473 | sendto_one(client_p, "ERROR :Server %s already exists", parv[1]); | |
474 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
475 | "Link %s cancelled, server %s already exists", | |
476 | get_server_name(client_p, SHOW_IP), parv[1]); | |
477 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", | |
478 | client_p->name, parv[1]); | |
479 | ||
480 | exit_client(NULL, client_p, &me, "Server Exists"); | |
481 | return 0; | |
482 | } | |
483 | ||
484 | /* collision on the SID? */ | |
485 | if((target_p = find_id(parv[3])) != NULL) | |
486 | { | |
487 | sendto_one(client_p, "ERROR :SID %s already exists", parv[3]); | |
488 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
489 | "Link %s cancelled, SID %s already exists", | |
490 | get_server_name(client_p, SHOW_IP), parv[3]); | |
491 | ilog(L_SERVER, "Link %s cancelled, SID %s already exists", | |
492 | client_p->name, parv[3]); | |
493 | ||
494 | exit_client(NULL, client_p, &me, "SID Exists"); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | if(bogus_host(parv[1]) || strlen(parv[1]) > HOSTLEN) | |
499 | { | |
500 | sendto_one(client_p, "ERROR :Invalid servername"); | |
501 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
502 | "Link %s cancelled, servername %s invalid", | |
503 | get_server_name(client_p, SHOW_IP), parv[1]); | |
504 | ilog(L_SERVER, "Link %s cancelled, servername %s invalid", | |
505 | client_p->name, parv[1]); | |
506 | ||
507 | exit_client(NULL, client_p, &me, "Bogus server name"); | |
508 | return 0; | |
509 | } | |
510 | ||
511 | if(!IsDigit(parv[3][0]) || !IsIdChar(parv[3][1]) || | |
512 | !IsIdChar(parv[3][2]) || parv[3][3] != '\0') | |
513 | { | |
514 | sendto_one(client_p, "ERROR :Invalid SID"); | |
515 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
516 | "Link %s cancelled, SID %s invalid", | |
517 | get_server_name(client_p, SHOW_IP), parv[3]); | |
518 | ilog(L_SERVER, "Link %s cancelled, SID %s invalid", | |
519 | client_p->name, parv[3]); | |
520 | ||
521 | exit_client(NULL, client_p, &me, "Bogus SID"); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | /* for the directly connected server: | |
526 | * H: allows it to introduce a server matching that mask | |
527 | * L: disallows it introducing a server matching that mask | |
528 | */ | |
529 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) | |
530 | { | |
531 | hub_p = ptr->data; | |
532 | ||
533 | if(match(hub_p->server, client_p->name) && match(hub_p->host, parv[1])) | |
534 | { | |
535 | if(hub_p->flags & CONF_HUB) | |
536 | hlined++; | |
537 | else | |
538 | llined++; | |
539 | } | |
540 | } | |
541 | ||
542 | /* no matching hub_mask */ | |
543 | if(!hlined) | |
544 | { | |
545 | sendto_one(client_p, "ERROR :No matching hub_mask"); | |
546 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
547 | "Non-Hub link %s introduced %s.", | |
548 | get_server_name(client_p, SHOW_IP), parv[1]); | |
549 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", | |
550 | client_p->name, parv[1]); | |
551 | exit_client(NULL, client_p, &me, "No matching hub_mask."); | |
552 | return 0; | |
553 | } | |
554 | ||
555 | /* matching leaf_mask */ | |
556 | if(llined) | |
557 | { | |
558 | sendto_one(client_p, "ERROR :Matching leaf_mask"); | |
559 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
560 | "Link %s introduced leafed server %s.", | |
561 | get_server_name(client_p, SHOW_IP), parv[1]); | |
562 | ilog(L_SERVER, "Link %s introduced leafed server %s.", | |
563 | client_p->name, parv[1]); | |
564 | exit_client(NULL, client_p, &me, "Leafed Server."); | |
565 | return 0; | |
566 | } | |
567 | ||
568 | /* ok, alls good */ | |
569 | target_p = make_client(client_p); | |
570 | make_server(target_p); | |
571 | ||
572 | strlcpy(target_p->name, parv[1], sizeof(target_p->name)); | |
573 | target_p->hopcount = atoi(parv[2]); | |
574 | strcpy(target_p->id, parv[3]); | |
575 | set_server_gecos(target_p, parv[4]); | |
576 | ||
577 | target_p->servptr = source_p; | |
578 | SetServer(target_p); | |
579 | ||
580 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); | |
581 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
582 | add_to_client_hash(target_p->name, target_p); | |
583 | add_to_id_hash(target_p->id, target_p); | |
584 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); | |
585 | ||
586 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); | |
587 | ||
588 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, | |
589 | ":%s SID %s %d %s :%s%s", | |
590 | source_p->id, target_p->name, target_p->hopcount + 1, | |
591 | target_p->id, IsHidden(target_p) ? "(H) " : "", target_p->info); | |
592 | sendto_server(client_p, NULL, NOCAPS, CAP_TS6, | |
593 | ":%s SERVER %s %d :%s%s", | |
594 | source_p->name, target_p->name, target_p->hopcount + 1, | |
595 | IsHidden(target_p) ? "(H) " : "", target_p->info); | |
596 | ||
597 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
598 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
599 | ||
600 | /* quick, dirty EOB. you know you love it. */ | |
601 | sendto_one(target_p, ":%s PING %s %s", | |
602 | get_id(&me, target_p), me.name, get_id(target_p, target_p)); | |
603 | ||
604 | hdata.client = source_p; | |
605 | hdata.target = target_p; | |
606 | call_hook(h_server_introduced, &hdata); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | /* set_server_gecos() | |
612 | * | |
613 | * input - pointer to client | |
614 | * output - none | |
615 | * side effects - servers gecos field is set | |
616 | */ | |
617 | static int | |
618 | set_server_gecos(struct Client *client_p, const char *info) | |
619 | { | |
620 | /* check the info for [IP] */ | |
621 | if(info[0]) | |
622 | { | |
623 | char *p; | |
624 | char *s; | |
625 | char *t; | |
626 | ||
627 | s = LOCAL_COPY(info); | |
628 | ||
629 | /* we should only check the first word for an ip */ | |
630 | if((p = strchr(s, ' '))) | |
631 | *p = '\0'; | |
632 | ||
633 | /* check for a ] which would symbolise an [IP] */ | |
634 | if((t = strchr(s, ']'))) | |
635 | { | |
636 | /* set s to after the first space */ | |
637 | if(p) | |
638 | s = ++p; | |
639 | else | |
640 | s = NULL; | |
641 | } | |
642 | /* no ], put the space back */ | |
643 | else if(p) | |
644 | *p = ' '; | |
645 | ||
646 | /* p may have been set to a trailing space, so check s exists and that | |
647 | * it isnt \0 */ | |
648 | if(s && (*s != '\0')) | |
649 | { | |
650 | /* a space? if not (H) could be the last part of info.. */ | |
651 | if((p = strchr(s, ' '))) | |
652 | *p = '\0'; | |
653 | ||
654 | /* check for (H) which is a hidden server */ | |
655 | if(!strcmp(s, "(H)")) | |
656 | { | |
657 | SetHidden(client_p); | |
658 | ||
659 | /* if there was no space.. theres nothing to set info to */ | |
660 | if(p) | |
661 | s = ++p; | |
662 | else | |
663 | s = NULL; | |
664 | } | |
665 | else if(p) | |
666 | *p = ' '; | |
667 | ||
668 | /* if there was a trailing space, s could point to \0, so check */ | |
669 | if(s && (*s != '\0')) | |
670 | { | |
671 | strlcpy(client_p->info, s, sizeof(client_p->info)); | |
672 | return 1; | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
677 | strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); | |
678 | ||
679 | return 1; | |
680 | } | |
681 | ||
682 | /* | |
683 | * bogus_host | |
684 | * | |
685 | * inputs - hostname | |
686 | * output - 1 if a bogus hostname input, 0 if its valid | |
687 | * side effects - none | |
688 | */ | |
689 | int | |
690 | bogus_host(const char *host) | |
691 | { | |
692 | int bogus_server = 0; | |
693 | const char *s; | |
694 | int dots = 0; | |
695 | ||
696 | for(s = host; *s; s++) | |
697 | { | |
698 | if(!IsServChar(*s)) | |
699 | { | |
700 | bogus_server = 1; | |
701 | break; | |
702 | } | |
703 | if('.' == *s) | |
704 | ++dots; | |
705 | } | |
706 | ||
707 | if(!dots || bogus_server) | |
708 | return 1; | |
709 | ||
710 | return 0; | |
711 | } |