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Commit | Line | Data |
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212380e3 AC |
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 | |
212380e3 AC |
23 | */ |
24 | ||
25 | #include "stdinc.h" | |
212380e3 | 26 | #include "client.h" /* client struct */ |
b3b7401f | 27 | #include "common.h" |
212380e3 | 28 | #include "hash.h" /* add_to_client_hash */ |
4562c604 | 29 | #include "match.h" |
212380e3 AC |
30 | #include "ircd.h" /* me */ |
31 | #include "numeric.h" /* ERR_xxx */ | |
32 | #include "s_conf.h" /* struct ConfItem */ | |
33 | #include "s_newconf.h" | |
4016731b | 34 | #include "logger.h" /* log level defines */ |
212380e3 AC |
35 | #include "s_serv.h" /* server_estab, check_server */ |
36 | #include "s_stats.h" /* ServerStats */ | |
994544c2 | 37 | #include "scache.h" |
212380e3 AC |
38 | #include "send.h" /* sendto_one */ |
39 | #include "msg.h" | |
40 | #include "parse.h" | |
41 | #include "modules.h" | |
42 | ||
4491f536 | 43 | static const char server_desc[] = |
51588bbc | 44 | "Provides the TS6 commands to introduce a new server to the network"; |
212380e3 | 45 | |
3c7d6fcc EM |
46 | static void mr_server(struct MsgBuf *, struct Client *, struct Client *, int, const char **); |
47 | static void ms_server(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
48 | static void ms_sid(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
49 | ||
50 | static bool bogus_host(const char *host); | |
51 | static void set_server_gecos(struct Client *, const char *); | |
52 | ||
212380e3 | 53 | struct Message server_msgtab = { |
7baa37a9 | 54 | "SERVER", 0, 0, 0, 0, |
212380e3 AC |
55 | {{mr_server, 4}, mg_reg, mg_ignore, {ms_server, 4}, mg_ignore, mg_reg} |
56 | }; | |
57 | struct Message sid_msgtab = { | |
7baa37a9 | 58 | "SID", 0, 0, 0, 0, |
212380e3 AC |
59 | {mg_ignore, mg_reg, mg_ignore, {ms_sid, 5}, mg_ignore, mg_reg} |
60 | }; | |
61 | ||
62 | mapi_clist_av1 server_clist[] = { &server_msgtab, &sid_msgtab, NULL }; | |
63 | ||
ee6dcb05 | 64 | DECLARE_MODULE_AV2(server, NULL, NULL, server_clist, NULL, NULL, NULL, NULL, server_desc); |
212380e3 | 65 | |
212380e3 AC |
66 | /* |
67 | * mr_server - SERVER message handler | |
212380e3 AC |
68 | * parv[1] = servername |
69 | * parv[2] = serverinfo/hopcount | |
70 | * parv[3] = serverinfo | |
71 | */ | |
3c7d6fcc | 72 | static void |
428ca87b | 73 | mr_server(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
74 | { |
75 | char info[REALLEN + 1]; | |
76 | const char *name; | |
77 | struct Client *target_p; | |
78 | int hop; | |
79d488b2 | 79 | unsigned int required_mask; |
fce4df54 | 80 | const char *missing; |
212380e3 AC |
81 | |
82 | name = parv[1]; | |
83 | hop = atoi(parv[2]); | |
f427c8b0 | 84 | rb_strlcpy(info, parv[3], sizeof(info)); |
212380e3 | 85 | |
9c2f9ec9 JT |
86 | if (IsHandshake(client_p) && irccmp(client_p->name, name)) |
87 | { | |
88 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
89 | "Server %s has unexpected name %s", | |
b3ebc7ab | 90 | client_p->name, name); |
9c2f9ec9 JT |
91 | ilog(L_SERVER, "Server %s has unexpected name %s", |
92 | log_client_name(client_p, SHOW_IP), name); | |
93 | exit_client(client_p, client_p, client_p, "Server name mismatch"); | |
3c7d6fcc | 94 | return; |
9c2f9ec9 JT |
95 | } |
96 | ||
55abcbb2 | 97 | /* |
212380e3 AC |
98 | * Reject a direct nonTS server connection if we're TS_ONLY -orabidoo |
99 | */ | |
100 | if(!DoesTS(client_p)) | |
101 | { | |
102 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Link %s dropped, non-TS server", | |
b3ebc7ab | 103 | client_p->name); |
212380e3 | 104 | exit_client(client_p, client_p, client_p, "Non-TS server"); |
3c7d6fcc | 105 | return; |
212380e3 AC |
106 | } |
107 | ||
108 | if(bogus_host(name)) | |
109 | { | |
110 | exit_client(client_p, client_p, client_p, "Bogus server name"); | |
3c7d6fcc | 111 | return; |
212380e3 AC |
112 | } |
113 | ||
114 | /* Now we just have to call check_server and everything should be | |
115 | * check for us... -A1kmm. */ | |
116 | switch (check_server(name, client_p)) | |
117 | { | |
118 | case -1: | |
119 | if(ConfigFileEntry.warn_no_nline) | |
120 | { | |
121 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
122 | "Unauthorised server connection attempt from %s: " | |
123 | "No entry for servername %s", | |
b1ace057 | 124 | "[@255.255.255.255]", name); |
212380e3 AC |
125 | |
126 | ilog(L_SERVER, "Access denied, no connect block for server %s%s", | |
127 | EmptyString(client_p->name) ? name : "", | |
128 | log_client_name(client_p, SHOW_IP)); | |
129 | } | |
130 | ||
131 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
3c7d6fcc | 132 | return; |
212380e3 AC |
133 | /* NOT REACHED */ |
134 | break; | |
135 | ||
136 | case -2: | |
a58cdfa3 | 137 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
212380e3 | 138 | "Unauthorised server connection attempt from %s: " |
ff0cc1e6 | 139 | "Bad credentials for server %s", |
b1ace057 | 140 | "[@255.255.255.255]", name); |
212380e3 | 141 | |
ff0cc1e6 | 142 | ilog(L_SERVER, "Access denied, invalid credentials for server %s%s", |
212380e3 AC |
143 | EmptyString(client_p->name) ? name : "", |
144 | log_client_name(client_p, SHOW_IP)); | |
145 | ||
ff0cc1e6 | 146 | exit_client(client_p, client_p, client_p, "Invalid credentials."); |
3c7d6fcc | 147 | return; |
212380e3 AC |
148 | /* NOT REACHED */ |
149 | break; | |
150 | ||
151 | case -3: | |
152 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
153 | "Unauthorised server connection attempt from %s: " | |
154 | "Invalid host for server %s", | |
b1ace057 | 155 | "[@255.255.255.255]", name); |
212380e3 AC |
156 | |
157 | ilog(L_SERVER, "Access denied, invalid host for server %s%s", | |
158 | EmptyString(client_p->name) ? name : "", | |
159 | log_client_name(client_p, SHOW_IP)); | |
160 | ||
161 | exit_client(client_p, client_p, client_p, "Invalid host."); | |
3c7d6fcc | 162 | return; |
212380e3 AC |
163 | /* NOT REACHED */ |
164 | break; | |
165 | ||
166 | /* servername is > HOSTLEN */ | |
167 | case -4: | |
168 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
169 | "Invalid servername %s from %s", | |
b1ace057 | 170 | name, "[@255.255.255.255]"); |
212380e3 AC |
171 | ilog(L_SERVER, "Access denied, invalid servername from %s", |
172 | log_client_name(client_p, SHOW_IP)); | |
173 | ||
174 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
3c7d6fcc | 175 | return; |
212380e3 AC |
176 | /* NOT REACHED */ |
177 | break; | |
c6d72037 | 178 | case -5: |
8bd5767b JT |
179 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
180 | "Connection from servername %s requires SSL/TLS but is plaintext", | |
181 | name); | |
55abcbb2 | 182 | ilog(L_SERVER, "Access denied, requires SSL/TLS but is plaintext from %s", |
8bd5767b JT |
183 | log_client_name(client_p, SHOW_IP)); |
184 | ||
185 | exit_client(client_p, client_p, client_p, "Access denied, requires SSL/TLS but is plaintext"); | |
3c7d6fcc | 186 | return; |
212380e3 AC |
187 | } |
188 | ||
316cbf11 JT |
189 | /* require TS6 for direct links */ |
190 | if(!IsCapable(client_p, CAP_TS6)) | |
191 | { | |
192 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, | |
193 | "Link %s dropped, TS6 protocol is required", name); | |
194 | exit_client(client_p, client_p, client_p, "Incompatible TS version"); | |
3c7d6fcc | 195 | return; |
316cbf11 JT |
196 | } |
197 | ||
22b24f63 | 198 | /* check to ensure any "required" caps are set. --nenolod */ |
22b24f63 JT |
199 | required_mask = capability_index_get_required(serv_capindex); |
200 | if (!IsCapable(client_p, required_mask)) | |
201 | { | |
fce4df54 JT |
202 | missing = capability_index_list(serv_capindex, required_mask & |
203 | ~client_p->localClient->caps); | |
22b24f63 | 204 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
fce4df54 JT |
205 | "Link %s dropped, required CAPABs [%s] are missing", |
206 | name, missing); | |
207 | ilog(L_SERVER, "Link %s%s dropped, required CAPABs [%s] are missing", | |
22b24f63 | 208 | EmptyString(client_p->name) ? name : "", |
fce4df54 JT |
209 | log_client_name(client_p, SHOW_IP), missing); |
210 | /* Do not use '[' in the below message because it would cause | |
211 | * it to be considered potentially unsafe (might disclose IP | |
212 | * addresses) | |
213 | */ | |
214 | sendto_one(client_p, "ERROR :Missing required CAPABs (%s)", missing); | |
22b24f63 JT |
215 | exit_client(client_p, client_p, client_p, "Missing required CAPABs"); |
216 | ||
3c7d6fcc | 217 | return; |
22b24f63 JT |
218 | } |
219 | ||
b0b7de54 | 220 | if((target_p = find_server(NULL, name))) |
212380e3 AC |
221 | { |
222 | /* | |
223 | * This link is trying feed me a server that I already have | |
224 | * access through another path -- multiple paths not accepted | |
225 | * currently, kill this link immediately!! | |
226 | * | |
227 | * Rather than KILL the link which introduced it, KILL the | |
228 | * youngest of the two links. -avalon | |
229 | * | |
230 | * Definitely don't do that here. This is from an unregistered | |
231 | * connect - A1kmm. | |
232 | */ | |
7b054ca3 JT |
233 | if (target_p->servptr->flags & FLAGS_SERVICE) |
234 | { | |
235 | /* Assume any servers introduced by services | |
236 | * are jupes. | |
237 | * -- jilles | |
238 | */ | |
239 | sendto_one(client_p, "ERROR :Server juped."); | |
240 | } | |
241 | else | |
242 | { | |
243 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
244 | "Attempt to re-introduce server %s from %s", | |
245 | name, "[@255.255.255.255]"); | |
246 | ilog(L_SERVER, "Attempt to re-introduce server %s from %s", | |
247 | name, log_client_name(client_p, SHOW_IP)); | |
212380e3 | 248 | |
7b054ca3 JT |
249 | sendto_one(client_p, "ERROR :Server already exists."); |
250 | } | |
212380e3 | 251 | exit_client(client_p, client_p, client_p, "Server Exists"); |
3c7d6fcc | 252 | return; |
212380e3 AC |
253 | } |
254 | ||
255 | if(has_id(client_p) && (target_p = find_id(client_p->id)) != NULL) | |
256 | { | |
a58cdfa3 | 257 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
8e34ffc6 | 258 | "Attempt to re-introduce SID %s from %s%s (already in use by %s)", |
212380e3 AC |
259 | client_p->id, |
260 | EmptyString(client_p->name) ? name : "", | |
8e34ffc6 JT |
261 | client_p->name, target_p->name); |
262 | ilog(L_SERVER, "Attempt to re-introduce SID %s from %s%s (already in use by %s)", | |
212380e3 AC |
263 | client_p->id, |
264 | EmptyString(client_p->name) ? name : "", | |
8e34ffc6 JT |
265 | log_client_name(client_p, SHOW_IP), |
266 | target_p->name); | |
212380e3 AC |
267 | |
268 | sendto_one(client_p, "ERROR :SID already exists."); | |
269 | exit_client(client_p, client_p, client_p, "SID Exists"); | |
3c7d6fcc | 270 | return; |
212380e3 AC |
271 | } |
272 | ||
273 | /* | |
274 | * if we are connecting (Handshake), we already have the name from the | |
275 | * C:line in client_p->name | |
276 | */ | |
277 | ||
f427c8b0 | 278 | rb_strlcpy(client_p->name, name, sizeof(client_p->name)); |
212380e3 AC |
279 | set_server_gecos(client_p, info); |
280 | client_p->hopcount = hop; | |
281 | server_estab(client_p); | |
212380e3 AC |
282 | } |
283 | ||
284 | /* | |
285 | * ms_server - SERVER message handler | |
212380e3 AC |
286 | * parv[1] = servername |
287 | * parv[2] = serverinfo/hopcount | |
288 | * parv[3] = serverinfo | |
289 | */ | |
3c7d6fcc | 290 | static void |
428ca87b | 291 | ms_server(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
292 | { |
293 | char info[REALLEN + 1]; | |
294 | /* same size as in s_misc.c */ | |
295 | const char *name; | |
296 | struct Client *target_p; | |
297 | struct remote_conf *hub_p; | |
298 | hook_data_client hdata; | |
299 | int hop; | |
300 | int hlined = 0; | |
301 | int llined = 0; | |
5b96d9a6 | 302 | rb_dlink_node *ptr; |
7d428759 | 303 | char squitreason[160]; |
212380e3 AC |
304 | |
305 | name = parv[1]; | |
306 | hop = atoi(parv[2]); | |
f427c8b0 | 307 | rb_strlcpy(info, parv[3], sizeof(info)); |
212380e3 | 308 | |
dc336d1a | 309 | if(find_server(NULL, name)) |
212380e3 AC |
310 | { |
311 | /* | |
312 | * This link is trying feed me a server that I already have | |
313 | * access through another path -- multiple paths not accepted | |
314 | * currently, kill this link immediately!! | |
315 | * | |
316 | * Rather than KILL the link which introduced it, KILL the | |
317 | * youngest of the two links. -avalon | |
318 | * | |
319 | * I think that we should exit the link itself, not the introducer, | |
320 | * and we should always exit the most recently received(i.e. the | |
321 | * one we are receiving this SERVER for. -A1kmm | |
322 | * | |
323 | * You *cant* do this, if you link somewhere, it bursts you a server | |
324 | * that already exists, then sends you a client burst, you squit the | |
325 | * server, but you keep getting the burst of clients on a server that | |
326 | * doesnt exist, although ircd can handle it, its not a realistic | |
55abcbb2 | 327 | * solution.. --fl_ |
212380e3 | 328 | */ |
212380e3 AC |
329 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
330 | client_p->name, name); | |
331 | ||
5203cba5 | 332 | snprintf(squitreason, sizeof squitreason, |
7d428759 JT |
333 | "Server %s already exists", |
334 | name); | |
335 | exit_client(client_p, client_p, &me, squitreason); | |
3c7d6fcc | 336 | return; |
212380e3 AC |
337 | } |
338 | ||
55abcbb2 | 339 | /* |
212380e3 AC |
340 | * User nicks never have '.' in them and server names |
341 | * must always have '.' in them. | |
342 | */ | |
343 | if(strchr(name, '.') == NULL) | |
344 | { | |
345 | /* | |
346 | * Server trying to use the same name as a person. Would | |
347 | * cause a fair bit of confusion. Enough to make it hellish | |
348 | * for a while and servers to send stuff to the wrong place. | |
349 | */ | |
350 | sendto_one(client_p, "ERROR :Nickname %s already exists!", name); | |
351 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
352 | "Link %s cancelled: Server/nick collision on %s", | |
b3ebc7ab | 353 | client_p->name, name); |
212380e3 AC |
354 | ilog(L_SERVER, "Link %s cancelled: Server/nick collision on %s", |
355 | client_p->name, name); | |
356 | ||
357 | exit_client(client_p, client_p, client_p, "Nick as Server"); | |
3c7d6fcc | 358 | return; |
212380e3 AC |
359 | } |
360 | ||
361 | /* | |
362 | * Server is informing about a new server behind | |
363 | * this link. Create REMOTE server structure, | |
364 | * add it to list and propagate word to my other | |
365 | * server links... | |
366 | */ | |
212380e3 AC |
367 | |
368 | /* | |
369 | * See if the newly found server is behind a guaranteed | |
370 | * leaf. If so, close the link. | |
371 | * | |
372 | */ | |
5b96d9a6 | 373 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 AC |
374 | { |
375 | hub_p = ptr->data; | |
376 | ||
377 | if(match(hub_p->server, client_p->name) && match(hub_p->host, name)) | |
378 | { | |
379 | if(hub_p->flags & CONF_HUB) | |
380 | hlined++; | |
381 | else | |
382 | llined++; | |
383 | } | |
384 | } | |
385 | ||
386 | /* Ok, this way this works is | |
387 | * | |
388 | * A server can have a CONF_HUB allowing it to introduce servers | |
389 | * behind it. | |
390 | * | |
391 | * connect { | |
392 | * name = "irc.bighub.net"; | |
393 | * hub_mask="*"; | |
394 | * ... | |
55abcbb2 | 395 | * |
212380e3 AC |
396 | * That would allow "irc.bighub.net" to introduce anything it wanted.. |
397 | * | |
398 | * However | |
399 | * | |
400 | * connect { | |
401 | * name = "irc.somehub.fi"; | |
402 | * hub_mask="*"; | |
403 | * leaf_mask="*.edu"; | |
404 | *... | |
405 | * Would allow this server in finland to hub anything but | |
406 | * .edu's | |
407 | */ | |
408 | ||
847ce0e9 | 409 | /* Ok, check client_p can hub the new server */ |
212380e3 AC |
410 | if(!hlined) |
411 | { | |
412 | /* OOOPs nope can't HUB */ | |
413 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Non-Hub link %s introduced %s.", | |
b3ebc7ab | 414 | client_p->name, name); |
212380e3 AC |
415 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
416 | client_p->name, name); | |
417 | ||
5203cba5 | 418 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
419 | "No matching hub_mask for %s", |
420 | name); | |
421 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 422 | return; |
212380e3 AC |
423 | } |
424 | ||
425 | /* Check for the new server being leafed behind this HUB */ | |
426 | if(llined) | |
427 | { | |
428 | /* OOOPs nope can't HUB this leaf */ | |
429 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
430 | "Link %s introduced leafed server %s.", | |
b3ebc7ab | 431 | client_p->name, name); |
212380e3 | 432 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
55abcbb2 | 433 | client_p->name, name); |
212380e3 | 434 | |
5203cba5 | 435 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
436 | "Matching leaf_mask for %s", |
437 | name); | |
438 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 439 | return; |
212380e3 AC |
440 | } |
441 | ||
442 | ||
443 | ||
444 | if(strlen(name) > HOSTLEN) | |
445 | { | |
446 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
447 | "Link %s introduced server with invalid servername %s", | |
b3ebc7ab | 448 | client_p->name, name); |
212380e3 AC |
449 | ilog(L_SERVER, "Link %s introduced server with invalid servername %s", |
450 | client_p->name, name); | |
451 | ||
452 | exit_client(NULL, client_p, &me, "Invalid servername introduced."); | |
3c7d6fcc | 453 | return; |
212380e3 AC |
454 | } |
455 | ||
456 | target_p = make_client(client_p); | |
457 | make_server(target_p); | |
458 | target_p->hopcount = hop; | |
459 | ||
f427c8b0 | 460 | rb_strlcpy(target_p->name, name, sizeof(target_p->name)); |
212380e3 AC |
461 | |
462 | set_server_gecos(target_p, info); | |
463 | ||
212380e3 AC |
464 | target_p->servptr = source_p; |
465 | ||
466 | SetServer(target_p); | |
467 | ||
0e7cb7e6 JT |
468 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
469 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 | 470 | add_to_client_hash(target_p->name, target_p); |
0e7cb7e6 | 471 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 472 | |
994544c2 JT |
473 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
474 | ||
212380e3 AC |
475 | sendto_server(client_p, NULL, NOCAPS, NOCAPS, |
476 | ":%s SERVER %s %d :%s%s", | |
477 | source_p->name, target_p->name, target_p->hopcount + 1, | |
478 | IsHidden(target_p) ? "(H) " : "", target_p->info); | |
479 | ||
480 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
481 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
482 | ||
483 | /* quick, dirty EOB. you know you love it. */ | |
484 | sendto_one(target_p, ":%s PING %s %s", get_id(&me, target_p), me.name, target_p->name); | |
485 | ||
486 | hdata.client = source_p; | |
487 | hdata.target = target_p; | |
488 | call_hook(h_server_introduced, &hdata); | |
212380e3 AC |
489 | } |
490 | ||
3c7d6fcc | 491 | static void |
428ca87b | 492 | ms_sid(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
493 | { |
494 | struct Client *target_p; | |
495 | struct remote_conf *hub_p; | |
496 | hook_data_client hdata; | |
5b96d9a6 | 497 | rb_dlink_node *ptr; |
212380e3 AC |
498 | int hlined = 0; |
499 | int llined = 0; | |
8e34ffc6 | 500 | char squitreason[160]; |
212380e3 | 501 | |
212380e3 | 502 | /* collision on the name? */ |
dc336d1a | 503 | if(find_server(NULL, parv[1]) != NULL) |
212380e3 | 504 | { |
212380e3 AC |
505 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
506 | client_p->name, parv[1]); | |
507 | ||
5203cba5 | 508 | snprintf(squitreason, sizeof squitreason, |
7d428759 JT |
509 | "Server %s already exists", |
510 | parv[1]); | |
511 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 512 | return; |
212380e3 AC |
513 | } |
514 | ||
515 | /* collision on the SID? */ | |
516 | if((target_p = find_id(parv[3])) != NULL) | |
517 | { | |
8e34ffc6 JT |
518 | sendto_wallops_flags(UMODE_WALLOP, &me, |
519 | "Link %s cancelled, SID %s for server %s already in use by %s", | |
520 | client_p->name, parv[3], parv[1], target_p->name); | |
521 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, | |
522 | ":%s WALLOPS :Link %s cancelled, SID %s for server %s already in use by %s", | |
523 | me.id, client_p->name, parv[3], parv[1], target_p->name); | |
524 | ilog(L_SERVER, "Link %s cancelled, SID %s for server %s already in use by %s", | |
525 | client_p->name, parv[3], parv[1], target_p->name); | |
526 | ||
5203cba5 | 527 | snprintf(squitreason, sizeof squitreason, |
8e34ffc6 JT |
528 | "SID %s for %s already in use by %s", |
529 | parv[3], parv[1], target_p->name); | |
530 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 531 | return; |
212380e3 AC |
532 | } |
533 | ||
534 | if(bogus_host(parv[1]) || strlen(parv[1]) > HOSTLEN) | |
535 | { | |
536 | sendto_one(client_p, "ERROR :Invalid servername"); | |
537 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
538 | "Link %s cancelled, servername %s invalid", | |
b3ebc7ab | 539 | client_p->name, parv[1]); |
212380e3 AC |
540 | ilog(L_SERVER, "Link %s cancelled, servername %s invalid", |
541 | client_p->name, parv[1]); | |
542 | ||
543 | exit_client(NULL, client_p, &me, "Bogus server name"); | |
3c7d6fcc | 544 | return; |
212380e3 AC |
545 | } |
546 | ||
547 | if(!IsDigit(parv[3][0]) || !IsIdChar(parv[3][1]) || | |
548 | !IsIdChar(parv[3][2]) || parv[3][3] != '\0') | |
549 | { | |
550 | sendto_one(client_p, "ERROR :Invalid SID"); | |
551 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
552 | "Link %s cancelled, SID %s invalid", | |
b3ebc7ab | 553 | client_p->name, parv[3]); |
212380e3 AC |
554 | ilog(L_SERVER, "Link %s cancelled, SID %s invalid", |
555 | client_p->name, parv[3]); | |
556 | ||
557 | exit_client(NULL, client_p, &me, "Bogus SID"); | |
3c7d6fcc | 558 | return; |
212380e3 AC |
559 | } |
560 | ||
561 | /* for the directly connected server: | |
562 | * H: allows it to introduce a server matching that mask | |
563 | * L: disallows it introducing a server matching that mask | |
564 | */ | |
5b96d9a6 | 565 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 AC |
566 | { |
567 | hub_p = ptr->data; | |
568 | ||
569 | if(match(hub_p->server, client_p->name) && match(hub_p->host, parv[1])) | |
570 | { | |
571 | if(hub_p->flags & CONF_HUB) | |
572 | hlined++; | |
573 | else | |
574 | llined++; | |
575 | } | |
576 | } | |
577 | ||
578 | /* no matching hub_mask */ | |
579 | if(!hlined) | |
580 | { | |
212380e3 AC |
581 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
582 | "Non-Hub link %s introduced %s.", | |
b3ebc7ab | 583 | client_p->name, parv[1]); |
212380e3 AC |
584 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
585 | client_p->name, parv[1]); | |
8f7ca682 | 586 | |
5203cba5 | 587 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
588 | "No matching hub_mask for %s", |
589 | parv[1]); | |
590 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 591 | return; |
212380e3 AC |
592 | } |
593 | ||
594 | /* matching leaf_mask */ | |
595 | if(llined) | |
596 | { | |
212380e3 AC |
597 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
598 | "Link %s introduced leafed server %s.", | |
b3ebc7ab | 599 | client_p->name, parv[1]); |
212380e3 | 600 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
55abcbb2 | 601 | client_p->name, parv[1]); |
8f7ca682 | 602 | |
5203cba5 | 603 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
604 | "Matching leaf_mask for %s", |
605 | parv[1]); | |
606 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 607 | return; |
212380e3 AC |
608 | } |
609 | ||
610 | /* ok, alls good */ | |
611 | target_p = make_client(client_p); | |
612 | make_server(target_p); | |
613 | ||
f427c8b0 | 614 | rb_strlcpy(target_p->name, parv[1], sizeof(target_p->name)); |
212380e3 AC |
615 | target_p->hopcount = atoi(parv[2]); |
616 | strcpy(target_p->id, parv[3]); | |
617 | set_server_gecos(target_p, parv[4]); | |
618 | ||
212380e3 AC |
619 | target_p->servptr = source_p; |
620 | SetServer(target_p); | |
621 | ||
0e7cb7e6 JT |
622 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
623 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 AC |
624 | add_to_client_hash(target_p->name, target_p); |
625 | add_to_id_hash(target_p->id, target_p); | |
0e7cb7e6 | 626 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 627 | |
994544c2 JT |
628 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
629 | ||
212380e3 AC |
630 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, |
631 | ":%s SID %s %d %s :%s%s", | |
632 | source_p->id, target_p->name, target_p->hopcount + 1, | |
633 | target_p->id, IsHidden(target_p) ? "(H) " : "", target_p->info); | |
212380e3 AC |
634 | |
635 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
636 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
637 | ||
638 | /* quick, dirty EOB. you know you love it. */ | |
639 | sendto_one(target_p, ":%s PING %s %s", | |
640 | get_id(&me, target_p), me.name, get_id(target_p, target_p)); | |
641 | ||
642 | hdata.client = source_p; | |
643 | hdata.target = target_p; | |
644 | call_hook(h_server_introduced, &hdata); | |
212380e3 AC |
645 | } |
646 | ||
647 | /* set_server_gecos() | |
648 | * | |
649 | * input - pointer to client | |
650 | * output - none | |
651 | * side effects - servers gecos field is set | |
652 | */ | |
3c7d6fcc | 653 | static void |
212380e3 AC |
654 | set_server_gecos(struct Client *client_p, const char *info) |
655 | { | |
656 | /* check the info for [IP] */ | |
657 | if(info[0]) | |
658 | { | |
659 | char *p; | |
660 | char *s; | |
212380e3 AC |
661 | |
662 | s = LOCAL_COPY(info); | |
663 | ||
664 | /* we should only check the first word for an ip */ | |
665 | if((p = strchr(s, ' '))) | |
666 | *p = '\0'; | |
667 | ||
668 | /* check for a ] which would symbolise an [IP] */ | |
f93bc397 | 669 | if(strchr(s, ']')) |
212380e3 AC |
670 | { |
671 | /* set s to after the first space */ | |
672 | if(p) | |
673 | s = ++p; | |
674 | else | |
675 | s = NULL; | |
676 | } | |
677 | /* no ], put the space back */ | |
678 | else if(p) | |
679 | *p = ' '; | |
680 | ||
681 | /* p may have been set to a trailing space, so check s exists and that | |
682 | * it isnt \0 */ | |
683 | if(s && (*s != '\0')) | |
684 | { | |
685 | /* a space? if not (H) could be the last part of info.. */ | |
686 | if((p = strchr(s, ' '))) | |
687 | *p = '\0'; | |
688 | ||
689 | /* check for (H) which is a hidden server */ | |
690 | if(!strcmp(s, "(H)")) | |
691 | { | |
692 | SetHidden(client_p); | |
693 | ||
694 | /* if there was no space.. theres nothing to set info to */ | |
695 | if(p) | |
696 | s = ++p; | |
697 | else | |
698 | s = NULL; | |
699 | } | |
700 | else if(p) | |
701 | *p = ' '; | |
702 | ||
703 | /* if there was a trailing space, s could point to \0, so check */ | |
704 | if(s && (*s != '\0')) | |
705 | { | |
f427c8b0 | 706 | rb_strlcpy(client_p->info, s, sizeof(client_p->info)); |
3c7d6fcc | 707 | return; |
212380e3 AC |
708 | } |
709 | } | |
710 | } | |
711 | ||
f427c8b0 | 712 | rb_strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
212380e3 AC |
713 | } |
714 | ||
715 | /* | |
716 | * bogus_host | |
717 | * | |
718 | * inputs - hostname | |
3c7d6fcc | 719 | * output - true if a bogus hostname input, false if its valid |
212380e3 AC |
720 | * side effects - none |
721 | */ | |
3c7d6fcc | 722 | static bool |
212380e3 AC |
723 | bogus_host(const char *host) |
724 | { | |
3c7d6fcc | 725 | bool bogus_server = false; |
212380e3 AC |
726 | const char *s; |
727 | int dots = 0; | |
728 | ||
729 | for(s = host; *s; s++) | |
730 | { | |
731 | if(!IsServChar(*s)) | |
732 | { | |
3c7d6fcc | 733 | bogus_server = true; |
212380e3 AC |
734 | break; |
735 | } | |
736 | if('.' == *s) | |
737 | ++dots; | |
738 | } | |
739 | ||
740 | if(!dots || bogus_server) | |
3c7d6fcc | 741 | return true; |
212380e3 | 742 | |
3c7d6fcc | 743 | return false; |
212380e3 | 744 | } |