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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 */ |
212380e3 | 27 | #include "hash.h" /* add_to_client_hash */ |
4562c604 | 28 | #include "match.h" |
212380e3 AC |
29 | #include "ircd.h" /* me */ |
30 | #include "numeric.h" /* ERR_xxx */ | |
31 | #include "s_conf.h" /* struct ConfItem */ | |
32 | #include "s_newconf.h" | |
4016731b | 33 | #include "logger.h" /* log level defines */ |
212380e3 AC |
34 | #include "s_serv.h" /* server_estab, check_server */ |
35 | #include "s_stats.h" /* ServerStats */ | |
994544c2 | 36 | #include "scache.h" |
212380e3 AC |
37 | #include "send.h" /* sendto_one */ |
38 | #include "msg.h" | |
39 | #include "parse.h" | |
40 | #include "modules.h" | |
41 | ||
4491f536 | 42 | static const char server_desc[] = |
51588bbc | 43 | "Provides the TS6 commands to introduce a new server to the network"; |
212380e3 | 44 | |
3c7d6fcc EM |
45 | static void mr_server(struct MsgBuf *, struct Client *, struct Client *, int, const char **); |
46 | static void ms_server(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
47 | static void ms_sid(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
48 | ||
49 | static bool bogus_host(const char *host); | |
50 | static void set_server_gecos(struct Client *, const char *); | |
51 | ||
212380e3 | 52 | struct Message server_msgtab = { |
7baa37a9 | 53 | "SERVER", 0, 0, 0, 0, |
212380e3 AC |
54 | {{mr_server, 4}, mg_reg, mg_ignore, {ms_server, 4}, mg_ignore, mg_reg} |
55 | }; | |
56 | struct Message sid_msgtab = { | |
7baa37a9 | 57 | "SID", 0, 0, 0, 0, |
212380e3 AC |
58 | {mg_ignore, mg_reg, mg_ignore, {ms_sid, 5}, mg_ignore, mg_reg} |
59 | }; | |
60 | ||
61 | mapi_clist_av1 server_clist[] = { &server_msgtab, &sid_msgtab, NULL }; | |
62 | ||
ee6dcb05 | 63 | DECLARE_MODULE_AV2(server, NULL, NULL, server_clist, NULL, NULL, NULL, NULL, server_desc); |
212380e3 | 64 | |
212380e3 AC |
65 | /* |
66 | * mr_server - SERVER message handler | |
212380e3 AC |
67 | * parv[1] = servername |
68 | * parv[2] = serverinfo/hopcount | |
69 | * parv[3] = serverinfo | |
70 | */ | |
3c7d6fcc | 71 | static void |
428ca87b | 72 | mr_server(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
73 | { |
74 | char info[REALLEN + 1]; | |
75 | const char *name; | |
76 | struct Client *target_p; | |
77 | int hop; | |
79d488b2 | 78 | unsigned int required_mask; |
fce4df54 | 79 | const char *missing; |
b49efe57 | 80 | int ret; |
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. */ | |
b49efe57 SA |
116 | ret = check_server(name, client_p); |
117 | switch (ret) | |
212380e3 | 118 | { |
b49efe57 SA |
119 | case 0: |
120 | /* success */ | |
121 | break; | |
212380e3 AC |
122 | case -1: |
123 | if(ConfigFileEntry.warn_no_nline) | |
124 | { | |
125 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
126 | "Unauthorised server connection attempt from %s: " | |
127 | "No entry for servername %s", | |
b1ace057 | 128 | "[@255.255.255.255]", name); |
212380e3 AC |
129 | |
130 | ilog(L_SERVER, "Access denied, no connect block for server %s%s", | |
131 | EmptyString(client_p->name) ? name : "", | |
132 | log_client_name(client_p, SHOW_IP)); | |
133 | } | |
134 | ||
135 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
3c7d6fcc | 136 | return; |
212380e3 AC |
137 | /* NOT REACHED */ |
138 | break; | |
139 | ||
140 | case -2: | |
a58cdfa3 | 141 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
212380e3 | 142 | "Unauthorised server connection attempt from %s: " |
ff0cc1e6 | 143 | "Bad credentials for server %s", |
b1ace057 | 144 | "[@255.255.255.255]", name); |
212380e3 | 145 | |
ff0cc1e6 | 146 | ilog(L_SERVER, "Access denied, invalid credentials for server %s%s", |
212380e3 AC |
147 | EmptyString(client_p->name) ? name : "", |
148 | log_client_name(client_p, SHOW_IP)); | |
149 | ||
ff0cc1e6 | 150 | exit_client(client_p, client_p, client_p, "Invalid credentials."); |
3c7d6fcc | 151 | return; |
212380e3 AC |
152 | /* NOT REACHED */ |
153 | break; | |
154 | ||
155 | case -3: | |
156 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
157 | "Unauthorised server connection attempt from %s: " | |
158 | "Invalid host for server %s", | |
b1ace057 | 159 | "[@255.255.255.255]", name); |
212380e3 AC |
160 | |
161 | ilog(L_SERVER, "Access denied, invalid host for server %s%s", | |
162 | EmptyString(client_p->name) ? name : "", | |
163 | log_client_name(client_p, SHOW_IP)); | |
164 | ||
165 | exit_client(client_p, client_p, client_p, "Invalid host."); | |
3c7d6fcc | 166 | return; |
212380e3 AC |
167 | /* NOT REACHED */ |
168 | break; | |
169 | ||
170 | /* servername is > HOSTLEN */ | |
171 | case -4: | |
172 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
173 | "Invalid servername %s from %s", | |
b1ace057 | 174 | name, "[@255.255.255.255]"); |
212380e3 AC |
175 | ilog(L_SERVER, "Access denied, invalid servername from %s", |
176 | log_client_name(client_p, SHOW_IP)); | |
177 | ||
178 | exit_client(client_p, client_p, client_p, "Invalid servername."); | |
3c7d6fcc | 179 | return; |
212380e3 AC |
180 | /* NOT REACHED */ |
181 | break; | |
c6d72037 | 182 | case -5: |
8bd5767b JT |
183 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
184 | "Connection from servername %s requires SSL/TLS but is plaintext", | |
185 | name); | |
55abcbb2 | 186 | ilog(L_SERVER, "Access denied, requires SSL/TLS but is plaintext from %s", |
8bd5767b JT |
187 | log_client_name(client_p, SHOW_IP)); |
188 | ||
189 | exit_client(client_p, client_p, client_p, "Access denied, requires SSL/TLS but is plaintext"); | |
3c7d6fcc | 190 | return; |
b49efe57 SA |
191 | default: |
192 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
193 | "Connection from servername %s rejected, unknown error %d", | |
194 | name, ret); | |
195 | ilog(L_SERVER, "Access denied, unknown error %d for server %s%s", ret, | |
196 | EmptyString(client_p->name) ? name : "", | |
197 | log_client_name(client_p, SHOW_IP)); | |
198 | ||
199 | exit_client(client_p, client_p, client_p, "Unknown error."); | |
200 | return; | |
212380e3 AC |
201 | } |
202 | ||
316cbf11 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"); | |
3c7d6fcc | 209 | return; |
316cbf11 JT |
210 | } |
211 | ||
22b24f63 | 212 | /* check to ensure any "required" caps are set. --nenolod */ |
22b24f63 JT |
213 | required_mask = capability_index_get_required(serv_capindex); |
214 | if (!IsCapable(client_p, required_mask)) | |
215 | { | |
fce4df54 JT |
216 | missing = capability_index_list(serv_capindex, required_mask & |
217 | ~client_p->localClient->caps); | |
22b24f63 | 218 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
fce4df54 JT |
219 | "Link %s dropped, required CAPABs [%s] are missing", |
220 | name, missing); | |
221 | ilog(L_SERVER, "Link %s%s dropped, required CAPABs [%s] are missing", | |
22b24f63 | 222 | EmptyString(client_p->name) ? name : "", |
fce4df54 JT |
223 | log_client_name(client_p, SHOW_IP), missing); |
224 | /* Do not use '[' in the below message because it would cause | |
225 | * it to be considered potentially unsafe (might disclose IP | |
226 | * addresses) | |
227 | */ | |
228 | sendto_one(client_p, "ERROR :Missing required CAPABs (%s)", missing); | |
22b24f63 JT |
229 | exit_client(client_p, client_p, client_p, "Missing required CAPABs"); |
230 | ||
3c7d6fcc | 231 | return; |
22b24f63 JT |
232 | } |
233 | ||
b0b7de54 | 234 | if((target_p = find_server(NULL, name))) |
212380e3 AC |
235 | { |
236 | /* | |
237 | * This link is trying feed me a server that I already have | |
238 | * access through another path -- multiple paths not accepted | |
239 | * currently, kill this link immediately!! | |
240 | * | |
241 | * Rather than KILL the link which introduced it, KILL the | |
242 | * youngest of the two links. -avalon | |
243 | * | |
244 | * Definitely don't do that here. This is from an unregistered | |
245 | * connect - A1kmm. | |
246 | */ | |
7b054ca3 JT |
247 | if (target_p->servptr->flags & FLAGS_SERVICE) |
248 | { | |
249 | /* Assume any servers introduced by services | |
250 | * are jupes. | |
251 | * -- jilles | |
252 | */ | |
253 | sendto_one(client_p, "ERROR :Server juped."); | |
254 | } | |
255 | else | |
256 | { | |
257 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
258 | "Attempt to re-introduce server %s from %s", | |
259 | name, "[@255.255.255.255]"); | |
260 | ilog(L_SERVER, "Attempt to re-introduce server %s from %s", | |
261 | name, log_client_name(client_p, SHOW_IP)); | |
212380e3 | 262 | |
7b054ca3 JT |
263 | sendto_one(client_p, "ERROR :Server already exists."); |
264 | } | |
212380e3 | 265 | exit_client(client_p, client_p, client_p, "Server Exists"); |
3c7d6fcc | 266 | return; |
212380e3 AC |
267 | } |
268 | ||
269 | if(has_id(client_p) && (target_p = find_id(client_p->id)) != NULL) | |
270 | { | |
a58cdfa3 | 271 | sendto_realops_snomask(SNO_GENERAL, is_remote_connect(client_p) ? L_NETWIDE : L_ALL, |
8e34ffc6 | 272 | "Attempt to re-introduce SID %s from %s%s (already in use by %s)", |
212380e3 AC |
273 | client_p->id, |
274 | EmptyString(client_p->name) ? name : "", | |
8e34ffc6 JT |
275 | client_p->name, target_p->name); |
276 | ilog(L_SERVER, "Attempt to re-introduce SID %s from %s%s (already in use by %s)", | |
212380e3 AC |
277 | client_p->id, |
278 | EmptyString(client_p->name) ? name : "", | |
8e34ffc6 JT |
279 | log_client_name(client_p, SHOW_IP), |
280 | target_p->name); | |
212380e3 AC |
281 | |
282 | sendto_one(client_p, "ERROR :SID already exists."); | |
283 | exit_client(client_p, client_p, client_p, "SID Exists"); | |
3c7d6fcc | 284 | return; |
212380e3 AC |
285 | } |
286 | ||
287 | /* | |
288 | * if we are connecting (Handshake), we already have the name from the | |
289 | * C:line in client_p->name | |
290 | */ | |
291 | ||
f427c8b0 | 292 | rb_strlcpy(client_p->name, name, sizeof(client_p->name)); |
212380e3 AC |
293 | set_server_gecos(client_p, info); |
294 | client_p->hopcount = hop; | |
295 | server_estab(client_p); | |
212380e3 AC |
296 | } |
297 | ||
298 | /* | |
299 | * ms_server - SERVER message handler | |
212380e3 AC |
300 | * parv[1] = servername |
301 | * parv[2] = serverinfo/hopcount | |
302 | * parv[3] = serverinfo | |
303 | */ | |
3c7d6fcc | 304 | static void |
428ca87b | 305 | ms_server(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
306 | { |
307 | char info[REALLEN + 1]; | |
308 | /* same size as in s_misc.c */ | |
309 | const char *name; | |
310 | struct Client *target_p; | |
311 | struct remote_conf *hub_p; | |
312 | hook_data_client hdata; | |
313 | int hop; | |
314 | int hlined = 0; | |
315 | int llined = 0; | |
5b96d9a6 | 316 | rb_dlink_node *ptr; |
7d428759 | 317 | char squitreason[160]; |
212380e3 AC |
318 | |
319 | name = parv[1]; | |
320 | hop = atoi(parv[2]); | |
f427c8b0 | 321 | rb_strlcpy(info, parv[3], sizeof(info)); |
212380e3 | 322 | |
dc336d1a | 323 | if(find_server(NULL, name)) |
212380e3 AC |
324 | { |
325 | /* | |
326 | * This link is trying feed me a server that I already have | |
327 | * access through another path -- multiple paths not accepted | |
328 | * currently, kill this link immediately!! | |
329 | * | |
330 | * Rather than KILL the link which introduced it, KILL the | |
331 | * youngest of the two links. -avalon | |
332 | * | |
333 | * I think that we should exit the link itself, not the introducer, | |
334 | * and we should always exit the most recently received(i.e. the | |
335 | * one we are receiving this SERVER for. -A1kmm | |
336 | * | |
337 | * You *cant* do this, if you link somewhere, it bursts you a server | |
338 | * that already exists, then sends you a client burst, you squit the | |
339 | * server, but you keep getting the burst of clients on a server that | |
340 | * doesnt exist, although ircd can handle it, its not a realistic | |
55abcbb2 | 341 | * solution.. --fl_ |
212380e3 | 342 | */ |
212380e3 AC |
343 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
344 | client_p->name, name); | |
345 | ||
5203cba5 | 346 | snprintf(squitreason, sizeof squitreason, |
7d428759 JT |
347 | "Server %s already exists", |
348 | name); | |
349 | exit_client(client_p, client_p, &me, squitreason); | |
3c7d6fcc | 350 | return; |
212380e3 AC |
351 | } |
352 | ||
55abcbb2 | 353 | /* |
212380e3 AC |
354 | * User nicks never have '.' in them and server names |
355 | * must always have '.' in them. | |
356 | */ | |
357 | if(strchr(name, '.') == NULL) | |
358 | { | |
359 | /* | |
360 | * Server trying to use the same name as a person. Would | |
361 | * cause a fair bit of confusion. Enough to make it hellish | |
362 | * for a while and servers to send stuff to the wrong place. | |
363 | */ | |
364 | sendto_one(client_p, "ERROR :Nickname %s already exists!", name); | |
365 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
366 | "Link %s cancelled: Server/nick collision on %s", | |
b3ebc7ab | 367 | client_p->name, name); |
212380e3 AC |
368 | ilog(L_SERVER, "Link %s cancelled: Server/nick collision on %s", |
369 | client_p->name, name); | |
370 | ||
371 | exit_client(client_p, client_p, client_p, "Nick as Server"); | |
3c7d6fcc | 372 | return; |
212380e3 AC |
373 | } |
374 | ||
375 | /* | |
376 | * Server is informing about a new server behind | |
377 | * this link. Create REMOTE server structure, | |
378 | * add it to list and propagate word to my other | |
379 | * server links... | |
380 | */ | |
212380e3 AC |
381 | |
382 | /* | |
383 | * See if the newly found server is behind a guaranteed | |
384 | * leaf. If so, close the link. | |
385 | * | |
386 | */ | |
5b96d9a6 | 387 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 AC |
388 | { |
389 | hub_p = ptr->data; | |
390 | ||
391 | if(match(hub_p->server, client_p->name) && match(hub_p->host, name)) | |
392 | { | |
393 | if(hub_p->flags & CONF_HUB) | |
394 | hlined++; | |
395 | else | |
396 | llined++; | |
397 | } | |
398 | } | |
399 | ||
400 | /* Ok, this way this works is | |
401 | * | |
402 | * A server can have a CONF_HUB allowing it to introduce servers | |
403 | * behind it. | |
404 | * | |
405 | * connect { | |
406 | * name = "irc.bighub.net"; | |
407 | * hub_mask="*"; | |
408 | * ... | |
55abcbb2 | 409 | * |
212380e3 AC |
410 | * That would allow "irc.bighub.net" to introduce anything it wanted.. |
411 | * | |
412 | * However | |
413 | * | |
414 | * connect { | |
415 | * name = "irc.somehub.fi"; | |
416 | * hub_mask="*"; | |
417 | * leaf_mask="*.edu"; | |
418 | *... | |
419 | * Would allow this server in finland to hub anything but | |
420 | * .edu's | |
421 | */ | |
422 | ||
847ce0e9 | 423 | /* Ok, check client_p can hub the new server */ |
212380e3 AC |
424 | if(!hlined) |
425 | { | |
426 | /* OOOPs nope can't HUB */ | |
427 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Non-Hub link %s introduced %s.", | |
b3ebc7ab | 428 | client_p->name, name); |
212380e3 AC |
429 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
430 | client_p->name, name); | |
431 | ||
5203cba5 | 432 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
433 | "No matching hub_mask for %s", |
434 | name); | |
435 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 436 | return; |
212380e3 AC |
437 | } |
438 | ||
439 | /* Check for the new server being leafed behind this HUB */ | |
440 | if(llined) | |
441 | { | |
442 | /* OOOPs nope can't HUB this leaf */ | |
443 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
444 | "Link %s introduced leafed server %s.", | |
b3ebc7ab | 445 | client_p->name, name); |
212380e3 | 446 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
55abcbb2 | 447 | client_p->name, name); |
212380e3 | 448 | |
5203cba5 | 449 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
450 | "Matching leaf_mask for %s", |
451 | name); | |
452 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 453 | return; |
212380e3 AC |
454 | } |
455 | ||
456 | ||
457 | ||
458 | if(strlen(name) > HOSTLEN) | |
459 | { | |
460 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
461 | "Link %s introduced server with invalid servername %s", | |
b3ebc7ab | 462 | client_p->name, name); |
212380e3 AC |
463 | ilog(L_SERVER, "Link %s introduced server with invalid servername %s", |
464 | client_p->name, name); | |
465 | ||
466 | exit_client(NULL, client_p, &me, "Invalid servername introduced."); | |
3c7d6fcc | 467 | return; |
212380e3 AC |
468 | } |
469 | ||
470 | target_p = make_client(client_p); | |
471 | make_server(target_p); | |
472 | target_p->hopcount = hop; | |
473 | ||
f427c8b0 | 474 | rb_strlcpy(target_p->name, name, sizeof(target_p->name)); |
212380e3 AC |
475 | |
476 | set_server_gecos(target_p, info); | |
477 | ||
212380e3 AC |
478 | target_p->servptr = source_p; |
479 | ||
480 | SetServer(target_p); | |
481 | ||
0e7cb7e6 JT |
482 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
483 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 | 484 | add_to_client_hash(target_p->name, target_p); |
0e7cb7e6 | 485 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 486 | |
994544c2 JT |
487 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
488 | ||
212380e3 AC |
489 | sendto_server(client_p, NULL, NOCAPS, NOCAPS, |
490 | ":%s SERVER %s %d :%s%s", | |
491 | source_p->name, target_p->name, target_p->hopcount + 1, | |
492 | IsHidden(target_p) ? "(H) " : "", target_p->info); | |
493 | ||
494 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
495 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
496 | ||
497 | /* quick, dirty EOB. you know you love it. */ | |
498 | sendto_one(target_p, ":%s PING %s %s", get_id(&me, target_p), me.name, target_p->name); | |
499 | ||
500 | hdata.client = source_p; | |
501 | hdata.target = target_p; | |
502 | call_hook(h_server_introduced, &hdata); | |
212380e3 AC |
503 | } |
504 | ||
3c7d6fcc | 505 | static void |
428ca87b | 506 | ms_sid(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
507 | { |
508 | struct Client *target_p; | |
509 | struct remote_conf *hub_p; | |
510 | hook_data_client hdata; | |
5b96d9a6 | 511 | rb_dlink_node *ptr; |
212380e3 AC |
512 | int hlined = 0; |
513 | int llined = 0; | |
8e34ffc6 | 514 | char squitreason[160]; |
212380e3 | 515 | |
212380e3 | 516 | /* collision on the name? */ |
dc336d1a | 517 | if(find_server(NULL, parv[1]) != NULL) |
212380e3 | 518 | { |
212380e3 AC |
519 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
520 | client_p->name, parv[1]); | |
521 | ||
5203cba5 | 522 | snprintf(squitreason, sizeof squitreason, |
7d428759 JT |
523 | "Server %s already exists", |
524 | parv[1]); | |
525 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 526 | return; |
212380e3 AC |
527 | } |
528 | ||
529 | /* collision on the SID? */ | |
530 | if((target_p = find_id(parv[3])) != NULL) | |
531 | { | |
8e34ffc6 JT |
532 | sendto_wallops_flags(UMODE_WALLOP, &me, |
533 | "Link %s cancelled, SID %s for server %s already in use by %s", | |
534 | client_p->name, parv[3], parv[1], target_p->name); | |
535 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, | |
536 | ":%s WALLOPS :Link %s cancelled, SID %s for server %s already in use by %s", | |
537 | me.id, client_p->name, parv[3], parv[1], target_p->name); | |
538 | ilog(L_SERVER, "Link %s cancelled, SID %s for server %s already in use by %s", | |
539 | client_p->name, parv[3], parv[1], target_p->name); | |
540 | ||
5203cba5 | 541 | snprintf(squitreason, sizeof squitreason, |
8e34ffc6 JT |
542 | "SID %s for %s already in use by %s", |
543 | parv[3], parv[1], target_p->name); | |
544 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 545 | return; |
212380e3 AC |
546 | } |
547 | ||
548 | if(bogus_host(parv[1]) || strlen(parv[1]) > HOSTLEN) | |
549 | { | |
550 | sendto_one(client_p, "ERROR :Invalid servername"); | |
551 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
552 | "Link %s cancelled, servername %s invalid", | |
b3ebc7ab | 553 | client_p->name, parv[1]); |
212380e3 AC |
554 | ilog(L_SERVER, "Link %s cancelled, servername %s invalid", |
555 | client_p->name, parv[1]); | |
556 | ||
557 | exit_client(NULL, client_p, &me, "Bogus server name"); | |
3c7d6fcc | 558 | return; |
212380e3 AC |
559 | } |
560 | ||
561 | if(!IsDigit(parv[3][0]) || !IsIdChar(parv[3][1]) || | |
562 | !IsIdChar(parv[3][2]) || parv[3][3] != '\0') | |
563 | { | |
564 | sendto_one(client_p, "ERROR :Invalid SID"); | |
565 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
566 | "Link %s cancelled, SID %s invalid", | |
b3ebc7ab | 567 | client_p->name, parv[3]); |
212380e3 AC |
568 | ilog(L_SERVER, "Link %s cancelled, SID %s invalid", |
569 | client_p->name, parv[3]); | |
570 | ||
571 | exit_client(NULL, client_p, &me, "Bogus SID"); | |
3c7d6fcc | 572 | return; |
212380e3 AC |
573 | } |
574 | ||
575 | /* for the directly connected server: | |
576 | * H: allows it to introduce a server matching that mask | |
577 | * L: disallows it introducing a server matching that mask | |
578 | */ | |
5b96d9a6 | 579 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 AC |
580 | { |
581 | hub_p = ptr->data; | |
582 | ||
583 | if(match(hub_p->server, client_p->name) && match(hub_p->host, parv[1])) | |
584 | { | |
585 | if(hub_p->flags & CONF_HUB) | |
586 | hlined++; | |
587 | else | |
588 | llined++; | |
589 | } | |
590 | } | |
591 | ||
592 | /* no matching hub_mask */ | |
593 | if(!hlined) | |
594 | { | |
212380e3 AC |
595 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
596 | "Non-Hub link %s introduced %s.", | |
b3ebc7ab | 597 | client_p->name, parv[1]); |
212380e3 AC |
598 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
599 | client_p->name, parv[1]); | |
8f7ca682 | 600 | |
5203cba5 | 601 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
602 | "No matching hub_mask for %s", |
603 | parv[1]); | |
604 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 605 | return; |
212380e3 AC |
606 | } |
607 | ||
608 | /* matching leaf_mask */ | |
609 | if(llined) | |
610 | { | |
212380e3 AC |
611 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
612 | "Link %s introduced leafed server %s.", | |
b3ebc7ab | 613 | client_p->name, parv[1]); |
212380e3 | 614 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
55abcbb2 | 615 | client_p->name, parv[1]); |
8f7ca682 | 616 | |
5203cba5 | 617 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
618 | "Matching leaf_mask for %s", |
619 | parv[1]); | |
620 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 621 | return; |
212380e3 AC |
622 | } |
623 | ||
624 | /* ok, alls good */ | |
625 | target_p = make_client(client_p); | |
626 | make_server(target_p); | |
627 | ||
f427c8b0 | 628 | rb_strlcpy(target_p->name, parv[1], sizeof(target_p->name)); |
212380e3 AC |
629 | target_p->hopcount = atoi(parv[2]); |
630 | strcpy(target_p->id, parv[3]); | |
631 | set_server_gecos(target_p, parv[4]); | |
632 | ||
212380e3 AC |
633 | target_p->servptr = source_p; |
634 | SetServer(target_p); | |
635 | ||
0e7cb7e6 JT |
636 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
637 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 AC |
638 | add_to_client_hash(target_p->name, target_p); |
639 | add_to_id_hash(target_p->id, target_p); | |
0e7cb7e6 | 640 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 641 | |
994544c2 JT |
642 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
643 | ||
212380e3 AC |
644 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, |
645 | ":%s SID %s %d %s :%s%s", | |
646 | source_p->id, target_p->name, target_p->hopcount + 1, | |
647 | target_p->id, IsHidden(target_p) ? "(H) " : "", target_p->info); | |
212380e3 AC |
648 | |
649 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
650 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
651 | ||
652 | /* quick, dirty EOB. you know you love it. */ | |
653 | sendto_one(target_p, ":%s PING %s %s", | |
654 | get_id(&me, target_p), me.name, get_id(target_p, target_p)); | |
655 | ||
656 | hdata.client = source_p; | |
657 | hdata.target = target_p; | |
658 | call_hook(h_server_introduced, &hdata); | |
212380e3 AC |
659 | } |
660 | ||
661 | /* set_server_gecos() | |
662 | * | |
663 | * input - pointer to client | |
664 | * output - none | |
665 | * side effects - servers gecos field is set | |
666 | */ | |
3c7d6fcc | 667 | static void |
212380e3 AC |
668 | set_server_gecos(struct Client *client_p, const char *info) |
669 | { | |
670 | /* check the info for [IP] */ | |
671 | if(info[0]) | |
672 | { | |
673 | char *p; | |
674 | char *s; | |
212380e3 AC |
675 | |
676 | s = LOCAL_COPY(info); | |
677 | ||
678 | /* we should only check the first word for an ip */ | |
679 | if((p = strchr(s, ' '))) | |
680 | *p = '\0'; | |
681 | ||
682 | /* check for a ] which would symbolise an [IP] */ | |
f93bc397 | 683 | if(strchr(s, ']')) |
212380e3 AC |
684 | { |
685 | /* set s to after the first space */ | |
686 | if(p) | |
687 | s = ++p; | |
688 | else | |
689 | s = NULL; | |
690 | } | |
691 | /* no ], put the space back */ | |
692 | else if(p) | |
693 | *p = ' '; | |
694 | ||
695 | /* p may have been set to a trailing space, so check s exists and that | |
696 | * it isnt \0 */ | |
697 | if(s && (*s != '\0')) | |
698 | { | |
699 | /* a space? if not (H) could be the last part of info.. */ | |
700 | if((p = strchr(s, ' '))) | |
701 | *p = '\0'; | |
702 | ||
703 | /* check for (H) which is a hidden server */ | |
704 | if(!strcmp(s, "(H)")) | |
705 | { | |
706 | SetHidden(client_p); | |
707 | ||
708 | /* if there was no space.. theres nothing to set info to */ | |
709 | if(p) | |
710 | s = ++p; | |
711 | else | |
712 | s = NULL; | |
713 | } | |
714 | else if(p) | |
715 | *p = ' '; | |
716 | ||
717 | /* if there was a trailing space, s could point to \0, so check */ | |
718 | if(s && (*s != '\0')) | |
719 | { | |
f427c8b0 | 720 | rb_strlcpy(client_p->info, s, sizeof(client_p->info)); |
3c7d6fcc | 721 | return; |
212380e3 AC |
722 | } |
723 | } | |
724 | } | |
725 | ||
f427c8b0 | 726 | rb_strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
212380e3 AC |
727 | } |
728 | ||
729 | /* | |
730 | * bogus_host | |
731 | * | |
732 | * inputs - hostname | |
3c7d6fcc | 733 | * output - true if a bogus hostname input, false if its valid |
212380e3 AC |
734 | * side effects - none |
735 | */ | |
3c7d6fcc | 736 | static bool |
212380e3 AC |
737 | bogus_host(const char *host) |
738 | { | |
3c7d6fcc | 739 | bool bogus_server = false; |
212380e3 AC |
740 | const char *s; |
741 | int dots = 0; | |
742 | ||
743 | for(s = host; *s; s++) | |
744 | { | |
745 | if(!IsServChar(*s)) | |
746 | { | |
3c7d6fcc | 747 | bogus_server = true; |
212380e3 AC |
748 | break; |
749 | } | |
750 | if('.' == *s) | |
751 | ++dots; | |
752 | } | |
753 | ||
754 | if(!dots || bogus_server) | |
3c7d6fcc | 755 | return true; |
212380e3 | 756 | |
3c7d6fcc | 757 | return false; |
212380e3 | 758 | } |