]>
Commit | Line | Data |
---|---|---|
212380e3 | 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 | * | |
212380e3 | 24 | */ |
25 | ||
26 | #include "stdinc.h" | |
212380e3 | 27 | #include "client.h" /* client struct */ |
28 | #include "common.h" /* TRUE bleah */ | |
212380e3 | 29 | #include "hash.h" /* add_to_client_hash */ |
13ae2f4b | 30 | #include "match.h" |
212380e3 | 31 | #include "ircd.h" /* me */ |
32 | #include "numeric.h" /* ERR_xxx */ | |
33 | #include "s_conf.h" /* struct ConfItem */ | |
34 | #include "s_newconf.h" | |
d3455e2c | 35 | #include "logger.h" /* log level defines */ |
212380e3 | 36 | #include "s_serv.h" /* server_estab, check_server */ |
37 | #include "s_stats.h" /* ServerStats */ | |
994544c2 | 38 | #include "scache.h" |
212380e3 | 39 | #include "send.h" /* sendto_one */ |
40 | #include "msg.h" | |
41 | #include "parse.h" | |
42 | #include "modules.h" | |
43 | ||
44 | static int mr_server(struct Client *, struct Client *, int, const char **); | |
45 | static int ms_server(struct Client *, struct Client *, int, const char **); | |
46 | static int ms_sid(struct Client *, struct Client *, int, const char **); | |
47 | ||
48 | struct Message server_msgtab = { | |
49 | "SERVER", 0, 0, 0, MFLG_SLOW | MFLG_UNREG, | |
50 | {{mr_server, 4}, mg_reg, mg_ignore, {ms_server, 4}, mg_ignore, mg_reg} | |
51 | }; | |
52 | struct Message sid_msgtab = { | |
53 | "SID", 0, 0, 0, MFLG_SLOW, | |
54 | {mg_ignore, mg_reg, mg_ignore, {ms_sid, 5}, mg_ignore, mg_reg} | |
55 | }; | |
56 | ||
57 | mapi_clist_av1 server_clist[] = { &server_msgtab, &sid_msgtab, NULL }; | |
58 | ||
9c2f9ec9 | 59 | DECLARE_MODULE_AV1(server, NULL, NULL, server_clist, NULL, NULL, "$Revision: 3291 $"); |
212380e3 | 60 | |
61 | int bogus_host(const char *host); | |
212380e3 | 62 | static int set_server_gecos(struct Client *, const char *); |
63 | ||
64 | /* | |
65 | * mr_server - SERVER message handler | |
212380e3 | 66 | * parv[1] = servername |
67 | * parv[2] = serverinfo/hopcount | |
68 | * parv[3] = serverinfo | |
69 | */ | |
70 | static int | |
71 | mr_server(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
72 | { | |
73 | char info[REALLEN + 1]; | |
74 | const char *name; | |
75 | struct Client *target_p; | |
76 | int hop; | |
031c4b89 | 77 | struct Capability *cap; |
212380e3 | 78 | |
79 | name = parv[1]; | |
80 | hop = atoi(parv[2]); | |
907468c4 | 81 | rb_strlcpy(info, parv[3], sizeof(info)); |
212380e3 | 82 | |
9c2f9ec9 | 83 | if (IsHandshake(client_p) && irccmp(client_p->name, name)) |
84 | { | |
85 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
86 | "Server %s has unexpected name %s", | |
715b28fe | 87 | client_p->name, name); |
9c2f9ec9 | 88 | ilog(L_SERVER, "Server %s has unexpected name %s", |
89 | log_client_name(client_p, SHOW_IP), name); | |
90 | exit_client(client_p, client_p, client_p, "Server name mismatch"); | |
91 | return 0; | |
92 | } | |
93 | ||
212380e3 | 94 | /* |
95 | * Reject a direct nonTS server connection if we're TS_ONLY -orabidoo | |
96 | */ | |
97 | if(!DoesTS(client_p)) | |
98 | { | |
99 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Link %s dropped, non-TS server", | |
715b28fe | 100 | client_p->name); |
212380e3 | 101 | exit_client(client_p, client_p, client_p, "Non-TS server"); |
102 | return 0; | |
103 | } | |
104 | ||
105 | if(bogus_host(name)) | |
106 | { | |
107 | exit_client(client_p, client_p, client_p, "Bogus server name"); | |
108 | return 0; | |
109 | } | |
110 | ||
031c4b89 JT |
111 | /* check to ensure any "required" caps are set. --nenolod */ |
112 | for (cap = captab; cap->name; cap++) | |
113 | { | |
114 | if (!cap->required) | |
115 | continue; | |
116 | ||
117 | if (!(client_p->localClient->caps & cap->cap)) | |
118 | { | |
119 | char exitbuf[BUFSIZE]; | |
120 | ||
121 | rb_snprintf(exitbuf, BUFSIZE, "Missing required CAPAB [%s]", cap->name); | |
122 | exit_client(client_p, client_p, client_p, exitbuf); | |
123 | ||
124 | return 0; | |
125 | } | |
126 | } | |
127 | ||
212380e3 | 128 | /* Now we just have to call check_server and everything should be |
129 | * check for us... -A1kmm. */ | |
130 | switch (check_server(name, client_p)) | |
131 | { | |
132 | case -1: | |
133 | if(ConfigFileEntry.warn_no_nline) | |
134 | { | |
135 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
136 | "Unauthorised server connection attempt from %s: " | |
137 | "No entry for servername %s", | |
bdfc9ce6 | 138 | "[@255.255.255.255]", name); |
212380e3 | 139 | |
140 | ilog(L_SERVER, "Access denied, no connect block for server %s%s", | |
141 | EmptyString(client_p->name) ? name : "", | |
142 | log_client_name(client_p, SHOW_IP)); | |
143 | } | |
144 | ||
145 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
146 | return 0; | |
147 | /* NOT REACHED */ | |
148 | break; | |
149 | ||
150 | case -2: | |
fd4ba65e | 151 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
212380e3 | 152 | "Unauthorised server connection attempt from %s: " |
153 | "Bad password for server %s", | |
bdfc9ce6 | 154 | "[@255.255.255.255]", name); |
212380e3 | 155 | |
156 | ilog(L_SERVER, "Access denied, invalid password for server %s%s", | |
157 | EmptyString(client_p->name) ? name : "", | |
158 | log_client_name(client_p, SHOW_IP)); | |
159 | ||
160 | exit_client(client_p, client_p, client_p, "Invalid password."); | |
161 | return 0; | |
162 | /* NOT REACHED */ | |
163 | break; | |
164 | ||
165 | case -3: | |
166 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
167 | "Unauthorised server connection attempt from %s: " | |
168 | "Invalid host for server %s", | |
bdfc9ce6 | 169 | "[@255.255.255.255]", name); |
212380e3 | 170 | |
171 | ilog(L_SERVER, "Access denied, invalid host for server %s%s", | |
172 | EmptyString(client_p->name) ? name : "", | |
173 | log_client_name(client_p, SHOW_IP)); | |
174 | ||
175 | exit_client(client_p, client_p, client_p, "Invalid host."); | |
176 | return 0; | |
177 | /* NOT REACHED */ | |
178 | break; | |
179 | ||
180 | /* servername is > HOSTLEN */ | |
181 | case -4: | |
182 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
183 | "Invalid servername %s from %s", | |
bdfc9ce6 | 184 | name, "[@255.255.255.255]"); |
212380e3 | 185 | ilog(L_SERVER, "Access denied, invalid servername from %s", |
186 | log_client_name(client_p, SHOW_IP)); | |
187 | ||
188 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
189 | return 0; | |
190 | /* NOT REACHED */ | |
191 | break; | |
8db00894 | 192 | case -5: |
b717a466 JT |
193 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
194 | "Connection from servername %s requires SSL/TLS but is plaintext", | |
195 | name); | |
196 | ilog(L_SERVER, "Access denied, requires SSL/TLS but is plaintext from %s", | |
197 | log_client_name(client_p, SHOW_IP)); | |
198 | ||
199 | exit_client(client_p, client_p, client_p, "Access denied, requires SSL/TLS but is plaintext"); | |
8db00894 | 200 | return 0; |
212380e3 | 201 | } |
202 | ||
f037fff4 JT |
203 | /* require TS6 for direct links */ |
204 | if(!IsCapable(client_p, CAP_TS6)) | |
205 | { | |
206 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
207 | "Link %s dropped, TS6 protocol is required", name); | |
208 | exit_client(client_p, client_p, client_p, "Incompatible TS version"); | |
209 | return 0; | |
210 | } | |
211 | ||
b0b7de54 | 212 | if((target_p = find_server(NULL, name))) |
212380e3 | 213 | { |
214 | /* | |
215 | * This link is trying feed me a server that I already have | |
216 | * access through another path -- multiple paths not accepted | |
217 | * currently, kill this link immediately!! | |
218 | * | |
219 | * Rather than KILL the link which introduced it, KILL the | |
220 | * youngest of the two links. -avalon | |
221 | * | |
222 | * Definitely don't do that here. This is from an unregistered | |
223 | * connect - A1kmm. | |
224 | */ | |
2976cd53 JT |
225 | if (target_p->servptr->flags & FLAGS_SERVICE) |
226 | { | |
227 | /* Assume any servers introduced by services | |
228 | * are jupes. | |
229 | * -- jilles | |
230 | */ | |
231 | sendto_one(client_p, "ERROR :Server juped."); | |
232 | } | |
233 | else | |
234 | { | |
235 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
236 | "Attempt to re-introduce server %s from %s", | |
237 | name, "[@255.255.255.255]"); | |
238 | ilog(L_SERVER, "Attempt to re-introduce server %s from %s", | |
239 | name, log_client_name(client_p, SHOW_IP)); | |
212380e3 | 240 | |
2976cd53 JT |
241 | sendto_one(client_p, "ERROR :Server already exists."); |
242 | } | |
212380e3 | 243 | exit_client(client_p, client_p, client_p, "Server Exists"); |
244 | return 0; | |
245 | } | |
246 | ||
247 | if(has_id(client_p) && (target_p = find_id(client_p->id)) != NULL) | |
248 | { | |
fd4ba65e | 249 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
9649981b | 250 | "Attempt to re-introduce SID %s from %s%s (already in use by %s)", |
212380e3 | 251 | client_p->id, |
252 | EmptyString(client_p->name) ? name : "", | |
9649981b JT |
253 | client_p->name, target_p->name); |
254 | ilog(L_SERVER, "Attempt to re-introduce SID %s from %s%s (already in use by %s)", | |
212380e3 | 255 | client_p->id, |
256 | EmptyString(client_p->name) ? name : "", | |
9649981b JT |
257 | log_client_name(client_p, SHOW_IP), |
258 | target_p->name); | |
212380e3 | 259 | |
260 | sendto_one(client_p, "ERROR :SID already exists."); | |
261 | exit_client(client_p, client_p, client_p, "SID Exists"); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | /* | |
266 | * if we are connecting (Handshake), we already have the name from the | |
267 | * C:line in client_p->name | |
268 | */ | |
269 | ||
907468c4 | 270 | rb_strlcpy(client_p->name, name, sizeof(client_p->name)); |
212380e3 | 271 | set_server_gecos(client_p, info); |
272 | client_p->hopcount = hop; | |
273 | server_estab(client_p); | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | /* | |
279 | * ms_server - SERVER message handler | |
212380e3 | 280 | * parv[1] = servername |
281 | * parv[2] = serverinfo/hopcount | |
282 | * parv[3] = serverinfo | |
283 | */ | |
284 | static int | |
285 | ms_server(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
286 | { | |
287 | char info[REALLEN + 1]; | |
288 | /* same size as in s_misc.c */ | |
289 | const char *name; | |
290 | struct Client *target_p; | |
291 | struct remote_conf *hub_p; | |
292 | hook_data_client hdata; | |
293 | int hop; | |
294 | int hlined = 0; | |
295 | int llined = 0; | |
08d11e34 | 296 | rb_dlink_node *ptr; |
deb74494 | 297 | char squitreason[160]; |
212380e3 | 298 | |
299 | name = parv[1]; | |
300 | hop = atoi(parv[2]); | |
907468c4 | 301 | rb_strlcpy(info, parv[3], sizeof(info)); |
212380e3 | 302 | |
b0b7de54 | 303 | if((target_p = find_server(NULL, name))) |
212380e3 | 304 | { |
305 | /* | |
306 | * This link is trying feed me a server that I already have | |
307 | * access through another path -- multiple paths not accepted | |
308 | * currently, kill this link immediately!! | |
309 | * | |
310 | * Rather than KILL the link which introduced it, KILL the | |
311 | * youngest of the two links. -avalon | |
312 | * | |
313 | * I think that we should exit the link itself, not the introducer, | |
314 | * and we should always exit the most recently received(i.e. the | |
315 | * one we are receiving this SERVER for. -A1kmm | |
316 | * | |
317 | * You *cant* do this, if you link somewhere, it bursts you a server | |
318 | * that already exists, then sends you a client burst, you squit the | |
319 | * server, but you keep getting the burst of clients on a server that | |
320 | * doesnt exist, although ircd can handle it, its not a realistic | |
321 | * solution.. --fl_ | |
322 | */ | |
212380e3 | 323 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
324 | client_p->name, name); | |
325 | ||
5b0a5279 | 326 | rb_snprintf(squitreason, sizeof squitreason, |
deb74494 JT |
327 | "Server %s already exists", |
328 | name); | |
329 | exit_client(client_p, client_p, &me, squitreason); | |
212380e3 | 330 | return 0; |
331 | } | |
332 | ||
333 | /* | |
334 | * User nicks never have '.' in them and server names | |
335 | * must always have '.' in them. | |
336 | */ | |
337 | if(strchr(name, '.') == NULL) | |
338 | { | |
339 | /* | |
340 | * Server trying to use the same name as a person. Would | |
341 | * cause a fair bit of confusion. Enough to make it hellish | |
342 | * for a while and servers to send stuff to the wrong place. | |
343 | */ | |
344 | sendto_one(client_p, "ERROR :Nickname %s already exists!", name); | |
345 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
346 | "Link %s cancelled: Server/nick collision on %s", | |
715b28fe | 347 | client_p->name, name); |
212380e3 | 348 | ilog(L_SERVER, "Link %s cancelled: Server/nick collision on %s", |
349 | client_p->name, name); | |
350 | ||
351 | exit_client(client_p, client_p, client_p, "Nick as Server"); | |
352 | return 0; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Server is informing about a new server behind | |
357 | * this link. Create REMOTE server structure, | |
358 | * add it to list and propagate word to my other | |
359 | * server links... | |
360 | */ | |
212380e3 | 361 | |
362 | /* | |
363 | * See if the newly found server is behind a guaranteed | |
364 | * leaf. If so, close the link. | |
365 | * | |
366 | */ | |
08d11e34 | 367 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 | 368 | { |
369 | hub_p = ptr->data; | |
370 | ||
371 | if(match(hub_p->server, client_p->name) && match(hub_p->host, name)) | |
372 | { | |
373 | if(hub_p->flags & CONF_HUB) | |
374 | hlined++; | |
375 | else | |
376 | llined++; | |
377 | } | |
378 | } | |
379 | ||
380 | /* Ok, this way this works is | |
381 | * | |
382 | * A server can have a CONF_HUB allowing it to introduce servers | |
383 | * behind it. | |
384 | * | |
385 | * connect { | |
386 | * name = "irc.bighub.net"; | |
387 | * hub_mask="*"; | |
388 | * ... | |
389 | * | |
390 | * That would allow "irc.bighub.net" to introduce anything it wanted.. | |
391 | * | |
392 | * However | |
393 | * | |
394 | * connect { | |
395 | * name = "irc.somehub.fi"; | |
396 | * hub_mask="*"; | |
397 | * leaf_mask="*.edu"; | |
398 | *... | |
399 | * Would allow this server in finland to hub anything but | |
400 | * .edu's | |
401 | */ | |
402 | ||
341504a7 | 403 | /* Ok, check client_p can hub the new server */ |
212380e3 | 404 | if(!hlined) |
405 | { | |
406 | /* OOOPs nope can't HUB */ | |
407 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Non-Hub link %s introduced %s.", | |
715b28fe | 408 | client_p->name, name); |
212380e3 | 409 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
410 | client_p->name, name); | |
411 | ||
c71ae7f0 JT |
412 | rb_snprintf(squitreason, sizeof squitreason, |
413 | "No matching hub_mask for %s", | |
414 | name); | |
415 | exit_client(NULL, client_p, &me, squitreason); | |
212380e3 | 416 | return 0; |
417 | } | |
418 | ||
419 | /* Check for the new server being leafed behind this HUB */ | |
420 | if(llined) | |
421 | { | |
422 | /* OOOPs nope can't HUB this leaf */ | |
423 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
424 | "Link %s introduced leafed server %s.", | |
715b28fe | 425 | client_p->name, name); |
212380e3 | 426 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
427 | client_p->name, name); | |
428 | ||
c71ae7f0 JT |
429 | rb_snprintf(squitreason, sizeof squitreason, |
430 | "Matching leaf_mask for %s", | |
431 | name); | |
432 | exit_client(NULL, client_p, &me, squitreason); | |
212380e3 | 433 | return 0; |
434 | } | |
435 | ||
436 | ||
437 | ||
438 | if(strlen(name) > HOSTLEN) | |
439 | { | |
440 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
441 | "Link %s introduced server with invalid servername %s", | |
715b28fe | 442 | client_p->name, name); |
212380e3 | 443 | ilog(L_SERVER, "Link %s introduced server with invalid servername %s", |
444 | client_p->name, name); | |
445 | ||
446 | exit_client(NULL, client_p, &me, "Invalid servername introduced."); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | target_p = make_client(client_p); | |
451 | make_server(target_p); | |
452 | target_p->hopcount = hop; | |
453 | ||
907468c4 | 454 | rb_strlcpy(target_p->name, name, sizeof(target_p->name)); |
212380e3 | 455 | |
456 | set_server_gecos(target_p, info); | |
457 | ||
212380e3 | 458 | target_p->servptr = source_p; |
459 | ||
460 | SetServer(target_p); | |
461 | ||
bfccb2c0 JT |
462 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
463 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 | 464 | add_to_client_hash(target_p->name, target_p); |
bfccb2c0 | 465 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 466 | |
994544c2 JT |
467 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
468 | ||
212380e3 | 469 | sendto_server(client_p, NULL, NOCAPS, NOCAPS, |
470 | ":%s SERVER %s %d :%s%s", | |
471 | source_p->name, target_p->name, target_p->hopcount + 1, | |
472 | IsHidden(target_p) ? "(H) " : "", target_p->info); | |
473 | ||
474 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
475 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
476 | ||
477 | /* quick, dirty EOB. you know you love it. */ | |
478 | sendto_one(target_p, ":%s PING %s %s", get_id(&me, target_p), me.name, target_p->name); | |
479 | ||
480 | hdata.client = source_p; | |
481 | hdata.target = target_p; | |
482 | call_hook(h_server_introduced, &hdata); | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static int | |
488 | ms_sid(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
489 | { | |
490 | struct Client *target_p; | |
491 | struct remote_conf *hub_p; | |
492 | hook_data_client hdata; | |
08d11e34 | 493 | rb_dlink_node *ptr; |
212380e3 | 494 | int hop; |
495 | int hlined = 0; | |
496 | int llined = 0; | |
9649981b | 497 | char squitreason[160]; |
212380e3 | 498 | |
499 | hop = atoi(parv[2]); | |
500 | ||
501 | /* collision on the name? */ | |
b0b7de54 | 502 | if((target_p = find_server(NULL, parv[1])) != NULL) |
212380e3 | 503 | { |
212380e3 | 504 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
505 | client_p->name, parv[1]); | |
506 | ||
5b0a5279 | 507 | rb_snprintf(squitreason, sizeof squitreason, |
deb74494 JT |
508 | "Server %s already exists", |
509 | parv[1]); | |
510 | exit_client(NULL, client_p, &me, squitreason); | |
212380e3 | 511 | return 0; |
512 | } | |
513 | ||
514 | /* collision on the SID? */ | |
515 | if((target_p = find_id(parv[3])) != NULL) | |
516 | { | |
9649981b JT |
517 | sendto_wallops_flags(UMODE_WALLOP, &me, |
518 | "Link %s cancelled, SID %s for server %s already in use by %s", | |
519 | client_p->name, parv[3], parv[1], target_p->name); | |
520 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, | |
521 | ":%s WALLOPS :Link %s cancelled, SID %s for server %s already in use by %s", | |
522 | me.id, client_p->name, parv[3], parv[1], target_p->name); | |
523 | ilog(L_SERVER, "Link %s cancelled, SID %s for server %s already in use by %s", | |
524 | client_p->name, parv[3], parv[1], target_p->name); | |
525 | ||
5b0a5279 | 526 | rb_snprintf(squitreason, sizeof squitreason, |
9649981b JT |
527 | "SID %s for %s already in use by %s", |
528 | parv[3], parv[1], target_p->name); | |
529 | exit_client(NULL, client_p, &me, squitreason); | |
212380e3 | 530 | return 0; |
531 | } | |
532 | ||
533 | if(bogus_host(parv[1]) || strlen(parv[1]) > HOSTLEN) | |
534 | { | |
535 | sendto_one(client_p, "ERROR :Invalid servername"); | |
536 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
537 | "Link %s cancelled, servername %s invalid", | |
715b28fe | 538 | client_p->name, parv[1]); |
212380e3 | 539 | ilog(L_SERVER, "Link %s cancelled, servername %s invalid", |
540 | client_p->name, parv[1]); | |
541 | ||
542 | exit_client(NULL, client_p, &me, "Bogus server name"); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | if(!IsDigit(parv[3][0]) || !IsIdChar(parv[3][1]) || | |
547 | !IsIdChar(parv[3][2]) || parv[3][3] != '\0') | |
548 | { | |
549 | sendto_one(client_p, "ERROR :Invalid SID"); | |
550 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
551 | "Link %s cancelled, SID %s invalid", | |
715b28fe | 552 | client_p->name, parv[3]); |
212380e3 | 553 | ilog(L_SERVER, "Link %s cancelled, SID %s invalid", |
554 | client_p->name, parv[3]); | |
555 | ||
556 | exit_client(NULL, client_p, &me, "Bogus SID"); | |
557 | return 0; | |
558 | } | |
559 | ||
560 | /* for the directly connected server: | |
561 | * H: allows it to introduce a server matching that mask | |
562 | * L: disallows it introducing a server matching that mask | |
563 | */ | |
08d11e34 | 564 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 | 565 | { |
566 | hub_p = ptr->data; | |
567 | ||
568 | if(match(hub_p->server, client_p->name) && match(hub_p->host, parv[1])) | |
569 | { | |
570 | if(hub_p->flags & CONF_HUB) | |
571 | hlined++; | |
572 | else | |
573 | llined++; | |
574 | } | |
575 | } | |
576 | ||
577 | /* no matching hub_mask */ | |
578 | if(!hlined) | |
579 | { | |
212380e3 | 580 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
581 | "Non-Hub link %s introduced %s.", | |
715b28fe | 582 | client_p->name, parv[1]); |
212380e3 | 583 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
584 | client_p->name, parv[1]); | |
c71ae7f0 JT |
585 | |
586 | rb_snprintf(squitreason, sizeof squitreason, | |
587 | "No matching hub_mask for %s", | |
588 | parv[1]); | |
589 | exit_client(NULL, client_p, &me, squitreason); | |
212380e3 | 590 | return 0; |
591 | } | |
592 | ||
593 | /* matching leaf_mask */ | |
594 | if(llined) | |
595 | { | |
212380e3 | 596 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
597 | "Link %s introduced leafed server %s.", | |
715b28fe | 598 | client_p->name, parv[1]); |
212380e3 | 599 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
600 | client_p->name, parv[1]); | |
c71ae7f0 JT |
601 | |
602 | rb_snprintf(squitreason, sizeof squitreason, | |
603 | "Matching leaf_mask for %s", | |
604 | parv[1]); | |
605 | exit_client(NULL, client_p, &me, squitreason); | |
212380e3 | 606 | return 0; |
607 | } | |
608 | ||
609 | /* ok, alls good */ | |
610 | target_p = make_client(client_p); | |
611 | make_server(target_p); | |
612 | ||
907468c4 | 613 | rb_strlcpy(target_p->name, parv[1], sizeof(target_p->name)); |
212380e3 | 614 | target_p->hopcount = atoi(parv[2]); |
615 | strcpy(target_p->id, parv[3]); | |
616 | set_server_gecos(target_p, parv[4]); | |
617 | ||
212380e3 | 618 | target_p->servptr = source_p; |
619 | SetServer(target_p); | |
620 | ||
bfccb2c0 JT |
621 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
622 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 | 623 | add_to_client_hash(target_p->name, target_p); |
624 | add_to_id_hash(target_p->id, target_p); | |
bfccb2c0 | 625 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 626 | |
994544c2 JT |
627 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
628 | ||
212380e3 | 629 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, |
630 | ":%s SID %s %d %s :%s%s", | |
631 | source_p->id, target_p->name, target_p->hopcount + 1, | |
632 | target_p->id, IsHidden(target_p) ? "(H) " : "", target_p->info); | |
212380e3 | 633 | |
634 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
635 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
636 | ||
637 | /* quick, dirty EOB. you know you love it. */ | |
638 | sendto_one(target_p, ":%s PING %s %s", | |
639 | get_id(&me, target_p), me.name, get_id(target_p, target_p)); | |
640 | ||
641 | hdata.client = source_p; | |
642 | hdata.target = target_p; | |
643 | call_hook(h_server_introduced, &hdata); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | /* set_server_gecos() | |
649 | * | |
650 | * input - pointer to client | |
651 | * output - none | |
652 | * side effects - servers gecos field is set | |
653 | */ | |
654 | static int | |
655 | set_server_gecos(struct Client *client_p, const char *info) | |
656 | { | |
657 | /* check the info for [IP] */ | |
658 | if(info[0]) | |
659 | { | |
660 | char *p; | |
661 | char *s; | |
212380e3 | 662 | |
663 | s = LOCAL_COPY(info); | |
664 | ||
665 | /* we should only check the first word for an ip */ | |
666 | if((p = strchr(s, ' '))) | |
667 | *p = '\0'; | |
668 | ||
669 | /* check for a ] which would symbolise an [IP] */ | |
a6210c45 | 670 | if(strchr(s, ']')) |
212380e3 | 671 | { |
672 | /* set s to after the first space */ | |
673 | if(p) | |
674 | s = ++p; | |
675 | else | |
676 | s = NULL; | |
677 | } | |
678 | /* no ], put the space back */ | |
679 | else if(p) | |
680 | *p = ' '; | |
681 | ||
682 | /* p may have been set to a trailing space, so check s exists and that | |
683 | * it isnt \0 */ | |
684 | if(s && (*s != '\0')) | |
685 | { | |
686 | /* a space? if not (H) could be the last part of info.. */ | |
687 | if((p = strchr(s, ' '))) | |
688 | *p = '\0'; | |
689 | ||
690 | /* check for (H) which is a hidden server */ | |
691 | if(!strcmp(s, "(H)")) | |
692 | { | |
693 | SetHidden(client_p); | |
694 | ||
695 | /* if there was no space.. theres nothing to set info to */ | |
696 | if(p) | |
697 | s = ++p; | |
698 | else | |
699 | s = NULL; | |
700 | } | |
701 | else if(p) | |
702 | *p = ' '; | |
703 | ||
704 | /* if there was a trailing space, s could point to \0, so check */ | |
705 | if(s && (*s != '\0')) | |
706 | { | |
907468c4 | 707 | rb_strlcpy(client_p->info, s, sizeof(client_p->info)); |
212380e3 | 708 | return 1; |
709 | } | |
710 | } | |
711 | } | |
712 | ||
907468c4 | 713 | rb_strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
212380e3 | 714 | |
715 | return 1; | |
716 | } | |
717 | ||
718 | /* | |
719 | * bogus_host | |
720 | * | |
721 | * inputs - hostname | |
722 | * output - 1 if a bogus hostname input, 0 if its valid | |
723 | * side effects - none | |
724 | */ | |
725 | int | |
726 | bogus_host(const char *host) | |
727 | { | |
728 | int bogus_server = 0; | |
729 | const char *s; | |
730 | int dots = 0; | |
731 | ||
732 | for(s = host; *s; s++) | |
733 | { | |
734 | if(!IsServChar(*s)) | |
735 | { | |
736 | bogus_server = 1; | |
737 | break; | |
738 | } | |
739 | if('.' == *s) | |
740 | ++dots; | |
741 | } | |
742 | ||
743 | if(!dots || bogus_server) | |
744 | return 1; | |
745 | ||
746 | return 0; | |
747 | } |