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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 | { | |
a9227555 | 88 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
9c2f9ec9 | 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 | { | |
a9227555 | 102 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "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 | { | |
a9227555 | 125 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 AC |
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: | |
a9227555 | 141 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
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: | |
a9227555 | 156 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 AC |
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: | |
a9227555 | 172 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 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: |
a9227555 | 183 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
8bd5767b JT |
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; |
84e3e445 | 191 | case -6: |
df0c70dd KB |
192 | if (client_p->certfp) |
193 | { | |
a9227555 | 194 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
df0c70dd KB |
195 | "Connection from servername %s has invalid certificate fingerprint %s", |
196 | name, client_p->certfp); | |
197 | ilog(L_SERVER, "Access denied, invalid certificate fingerprint %s from %s", | |
198 | client_p->certfp, log_client_name(client_p, SHOW_IP)); | |
199 | exit_client(client_p, client_p, client_p, "Invalid fingerprint."); | |
200 | } | |
201 | else | |
202 | { | |
a9227555 | 203 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
df0c70dd KB |
204 | "Connection from servername %s failed certificate validation", |
205 | name); | |
206 | ilog(L_SERVER, "Access denied; certificate validation failed for certificate from %s", | |
207 | log_client_name(client_p, SHOW_IP)); | |
208 | exit_client(client_p, client_p, client_p, "Invalid certificate."); | |
209 | } | |
84e3e445 | 210 | |
d2b3a2a4 SA |
211 | return; |
212 | case -7: | |
a9227555 | 213 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
d2b3a2a4 SA |
214 | "Connection from servername %s rejected, no more connections allowed in class", |
215 | name); | |
216 | ilog(L_SERVER, "Access denied, no more connections allowed in class for %s", | |
217 | log_client_name(client_p, SHOW_IP)); | |
218 | ||
219 | exit_client(client_p, client_p, client_p, "Access denied, no more connections allowed in class"); | |
84e3e445 | 220 | return; |
b49efe57 | 221 | default: |
a9227555 | 222 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
b49efe57 SA |
223 | "Connection from servername %s rejected, unknown error %d", |
224 | name, ret); | |
225 | ilog(L_SERVER, "Access denied, unknown error %d for server %s%s", ret, | |
226 | EmptyString(client_p->name) ? name : "", | |
227 | log_client_name(client_p, SHOW_IP)); | |
228 | ||
229 | exit_client(client_p, client_p, client_p, "Unknown error."); | |
230 | return; | |
212380e3 AC |
231 | } |
232 | ||
316cbf11 JT |
233 | /* require TS6 for direct links */ |
234 | if(!IsCapable(client_p, CAP_TS6)) | |
235 | { | |
a9227555 | 236 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
316cbf11 JT |
237 | "Link %s dropped, TS6 protocol is required", name); |
238 | exit_client(client_p, client_p, client_p, "Incompatible TS version"); | |
3c7d6fcc | 239 | return; |
316cbf11 JT |
240 | } |
241 | ||
22b24f63 | 242 | /* check to ensure any "required" caps are set. --nenolod */ |
22b24f63 JT |
243 | required_mask = capability_index_get_required(serv_capindex); |
244 | if (!IsCapable(client_p, required_mask)) | |
245 | { | |
fce4df54 JT |
246 | missing = capability_index_list(serv_capindex, required_mask & |
247 | ~client_p->localClient->caps); | |
a9227555 | 248 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
fce4df54 JT |
249 | "Link %s dropped, required CAPABs [%s] are missing", |
250 | name, missing); | |
251 | ilog(L_SERVER, "Link %s%s dropped, required CAPABs [%s] are missing", | |
22b24f63 | 252 | EmptyString(client_p->name) ? name : "", |
fce4df54 JT |
253 | log_client_name(client_p, SHOW_IP), missing); |
254 | /* Do not use '[' in the below message because it would cause | |
255 | * it to be considered potentially unsafe (might disclose IP | |
256 | * addresses) | |
257 | */ | |
258 | sendto_one(client_p, "ERROR :Missing required CAPABs (%s)", missing); | |
22b24f63 JT |
259 | exit_client(client_p, client_p, client_p, "Missing required CAPABs"); |
260 | ||
3c7d6fcc | 261 | return; |
22b24f63 JT |
262 | } |
263 | ||
b0b7de54 | 264 | if((target_p = find_server(NULL, name))) |
212380e3 AC |
265 | { |
266 | /* | |
267 | * This link is trying feed me a server that I already have | |
268 | * access through another path -- multiple paths not accepted | |
269 | * currently, kill this link immediately!! | |
270 | * | |
271 | * Rather than KILL the link which introduced it, KILL the | |
272 | * youngest of the two links. -avalon | |
273 | * | |
274 | * Definitely don't do that here. This is from an unregistered | |
275 | * connect - A1kmm. | |
276 | */ | |
7b054ca3 JT |
277 | if (target_p->servptr->flags & FLAGS_SERVICE) |
278 | { | |
279 | /* Assume any servers introduced by services | |
280 | * are jupes. | |
281 | * -- jilles | |
282 | */ | |
283 | sendto_one(client_p, "ERROR :Server juped."); | |
284 | } | |
285 | else | |
286 | { | |
a9227555 | 287 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
7b054ca3 JT |
288 | "Attempt to re-introduce server %s from %s", |
289 | name, "[@255.255.255.255]"); | |
290 | ilog(L_SERVER, "Attempt to re-introduce server %s from %s", | |
291 | name, log_client_name(client_p, SHOW_IP)); | |
212380e3 | 292 | |
7b054ca3 JT |
293 | sendto_one(client_p, "ERROR :Server already exists."); |
294 | } | |
212380e3 | 295 | exit_client(client_p, client_p, client_p, "Server Exists"); |
3c7d6fcc | 296 | return; |
212380e3 AC |
297 | } |
298 | ||
d4b2529a SA |
299 | if (client_p->preClient && !EmptyString(client_p->preClient->id)) { |
300 | if ((target_p = find_id(client_p->preClient->id)) != NULL) { | |
a9227555 | 301 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
d4b2529a SA |
302 | "Attempt to re-introduce SID %s from %s%s (already in use by %s)", |
303 | client_p->preClient->id, | |
304 | EmptyString(client_p->name) ? name : "", | |
305 | client_p->name, target_p->name); | |
306 | ilog(L_SERVER, "Attempt to re-introduce SID %s from %s%s (already in use by %s)", | |
307 | client_p->preClient->id, | |
308 | EmptyString(client_p->name) ? name : "", | |
309 | log_client_name(client_p, SHOW_IP), | |
310 | target_p->name); | |
311 | ||
312 | sendto_one(client_p, "ERROR :SID already exists."); | |
313 | exit_client(client_p, client_p, client_p, "SID Exists"); | |
314 | return; | |
315 | } else { | |
316 | rb_strlcpy(client_p->id, client_p->preClient->id, sizeof(client_p->id)); | |
317 | } | |
212380e3 AC |
318 | } |
319 | ||
320 | /* | |
321 | * if we are connecting (Handshake), we already have the name from the | |
322 | * C:line in client_p->name | |
323 | */ | |
324 | ||
f427c8b0 | 325 | rb_strlcpy(client_p->name, name, sizeof(client_p->name)); |
212380e3 AC |
326 | set_server_gecos(client_p, info); |
327 | client_p->hopcount = hop; | |
328 | server_estab(client_p); | |
212380e3 AC |
329 | } |
330 | ||
331 | /* | |
332 | * ms_server - SERVER message handler | |
212380e3 AC |
333 | * parv[1] = servername |
334 | * parv[2] = serverinfo/hopcount | |
335 | * parv[3] = serverinfo | |
336 | */ | |
3c7d6fcc | 337 | static void |
428ca87b | 338 | ms_server(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
339 | { |
340 | char info[REALLEN + 1]; | |
341 | /* same size as in s_misc.c */ | |
342 | const char *name; | |
343 | struct Client *target_p; | |
344 | struct remote_conf *hub_p; | |
345 | hook_data_client hdata; | |
346 | int hop; | |
347 | int hlined = 0; | |
348 | int llined = 0; | |
5b96d9a6 | 349 | rb_dlink_node *ptr; |
7d428759 | 350 | char squitreason[160]; |
212380e3 AC |
351 | |
352 | name = parv[1]; | |
353 | hop = atoi(parv[2]); | |
f427c8b0 | 354 | rb_strlcpy(info, parv[3], sizeof(info)); |
212380e3 | 355 | |
dc336d1a | 356 | if(find_server(NULL, name)) |
212380e3 AC |
357 | { |
358 | /* | |
359 | * This link is trying feed me a server that I already have | |
360 | * access through another path -- multiple paths not accepted | |
361 | * currently, kill this link immediately!! | |
362 | * | |
363 | * Rather than KILL the link which introduced it, KILL the | |
364 | * youngest of the two links. -avalon | |
365 | * | |
366 | * I think that we should exit the link itself, not the introducer, | |
367 | * and we should always exit the most recently received(i.e. the | |
368 | * one we are receiving this SERVER for. -A1kmm | |
369 | * | |
370 | * You *cant* do this, if you link somewhere, it bursts you a server | |
371 | * that already exists, then sends you a client burst, you squit the | |
372 | * server, but you keep getting the burst of clients on a server that | |
373 | * doesnt exist, although ircd can handle it, its not a realistic | |
55abcbb2 | 374 | * solution.. --fl_ |
212380e3 | 375 | */ |
212380e3 AC |
376 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
377 | client_p->name, name); | |
378 | ||
5203cba5 | 379 | snprintf(squitreason, sizeof squitreason, |
7d428759 JT |
380 | "Server %s already exists", |
381 | name); | |
382 | exit_client(client_p, client_p, &me, squitreason); | |
3c7d6fcc | 383 | return; |
212380e3 AC |
384 | } |
385 | ||
55abcbb2 | 386 | /* |
212380e3 AC |
387 | * User nicks never have '.' in them and server names |
388 | * must always have '.' in them. | |
389 | */ | |
390 | if(strchr(name, '.') == NULL) | |
391 | { | |
392 | /* | |
393 | * Server trying to use the same name as a person. Would | |
394 | * cause a fair bit of confusion. Enough to make it hellish | |
395 | * for a while and servers to send stuff to the wrong place. | |
396 | */ | |
397 | sendto_one(client_p, "ERROR :Nickname %s already exists!", name); | |
a9227555 | 398 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 399 | "Link %s cancelled: Server/nick collision on %s", |
b3ebc7ab | 400 | client_p->name, name); |
212380e3 AC |
401 | ilog(L_SERVER, "Link %s cancelled: Server/nick collision on %s", |
402 | client_p->name, name); | |
403 | ||
404 | exit_client(client_p, client_p, client_p, "Nick as Server"); | |
3c7d6fcc | 405 | return; |
212380e3 AC |
406 | } |
407 | ||
408 | /* | |
409 | * Server is informing about a new server behind | |
410 | * this link. Create REMOTE server structure, | |
411 | * add it to list and propagate word to my other | |
412 | * server links... | |
413 | */ | |
212380e3 AC |
414 | |
415 | /* | |
416 | * See if the newly found server is behind a guaranteed | |
417 | * leaf. If so, close the link. | |
418 | * | |
419 | */ | |
5b96d9a6 | 420 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 AC |
421 | { |
422 | hub_p = ptr->data; | |
423 | ||
424 | if(match(hub_p->server, client_p->name) && match(hub_p->host, name)) | |
425 | { | |
426 | if(hub_p->flags & CONF_HUB) | |
427 | hlined++; | |
428 | else | |
429 | llined++; | |
430 | } | |
431 | } | |
432 | ||
433 | /* Ok, this way this works is | |
434 | * | |
435 | * A server can have a CONF_HUB allowing it to introduce servers | |
436 | * behind it. | |
437 | * | |
438 | * connect { | |
439 | * name = "irc.bighub.net"; | |
440 | * hub_mask="*"; | |
441 | * ... | |
55abcbb2 | 442 | * |
212380e3 AC |
443 | * That would allow "irc.bighub.net" to introduce anything it wanted.. |
444 | * | |
445 | * However | |
446 | * | |
447 | * connect { | |
448 | * name = "irc.somehub.fi"; | |
449 | * hub_mask="*"; | |
450 | * leaf_mask="*.edu"; | |
451 | *... | |
452 | * Would allow this server in finland to hub anything but | |
453 | * .edu's | |
454 | */ | |
455 | ||
847ce0e9 | 456 | /* Ok, check client_p can hub the new server */ |
212380e3 AC |
457 | if(!hlined) |
458 | { | |
459 | /* OOOPs nope can't HUB */ | |
a9227555 | 460 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Non-Hub link %s introduced %s.", |
b3ebc7ab | 461 | client_p->name, name); |
212380e3 AC |
462 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
463 | client_p->name, name); | |
464 | ||
5203cba5 | 465 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
466 | "No matching hub_mask for %s", |
467 | name); | |
468 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 469 | return; |
212380e3 AC |
470 | } |
471 | ||
472 | /* Check for the new server being leafed behind this HUB */ | |
473 | if(llined) | |
474 | { | |
475 | /* OOOPs nope can't HUB this leaf */ | |
a9227555 | 476 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 477 | "Link %s introduced leafed server %s.", |
b3ebc7ab | 478 | client_p->name, name); |
212380e3 | 479 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
55abcbb2 | 480 | client_p->name, name); |
212380e3 | 481 | |
5203cba5 | 482 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
483 | "Matching leaf_mask for %s", |
484 | name); | |
485 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 486 | return; |
212380e3 AC |
487 | } |
488 | ||
489 | ||
490 | ||
491 | if(strlen(name) > HOSTLEN) | |
492 | { | |
a9227555 | 493 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 494 | "Link %s introduced server with invalid servername %s", |
b3ebc7ab | 495 | client_p->name, name); |
212380e3 AC |
496 | ilog(L_SERVER, "Link %s introduced server with invalid servername %s", |
497 | client_p->name, name); | |
498 | ||
499 | exit_client(NULL, client_p, &me, "Invalid servername introduced."); | |
3c7d6fcc | 500 | return; |
212380e3 AC |
501 | } |
502 | ||
503 | target_p = make_client(client_p); | |
504 | make_server(target_p); | |
505 | target_p->hopcount = hop; | |
506 | ||
f427c8b0 | 507 | rb_strlcpy(target_p->name, name, sizeof(target_p->name)); |
212380e3 AC |
508 | |
509 | set_server_gecos(target_p, info); | |
510 | ||
212380e3 AC |
511 | target_p->servptr = source_p; |
512 | ||
513 | SetServer(target_p); | |
514 | ||
0e7cb7e6 JT |
515 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
516 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 | 517 | add_to_client_hash(target_p->name, target_p); |
0e7cb7e6 | 518 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 519 | |
994544c2 JT |
520 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
521 | ||
212380e3 AC |
522 | sendto_server(client_p, NULL, NOCAPS, NOCAPS, |
523 | ":%s SERVER %s %d :%s%s", | |
524 | source_p->name, target_p->name, target_p->hopcount + 1, | |
525 | IsHidden(target_p) ? "(H) " : "", target_p->info); | |
526 | ||
527 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
528 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
529 | ||
530 | /* quick, dirty EOB. you know you love it. */ | |
531 | sendto_one(target_p, ":%s PING %s %s", get_id(&me, target_p), me.name, target_p->name); | |
532 | ||
533 | hdata.client = source_p; | |
534 | hdata.target = target_p; | |
535 | call_hook(h_server_introduced, &hdata); | |
212380e3 AC |
536 | } |
537 | ||
3c7d6fcc | 538 | static void |
428ca87b | 539 | ms_sid(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
212380e3 AC |
540 | { |
541 | struct Client *target_p; | |
542 | struct remote_conf *hub_p; | |
543 | hook_data_client hdata; | |
5b96d9a6 | 544 | rb_dlink_node *ptr; |
212380e3 AC |
545 | int hlined = 0; |
546 | int llined = 0; | |
8e34ffc6 | 547 | char squitreason[160]; |
212380e3 | 548 | |
212380e3 | 549 | /* collision on the name? */ |
dc336d1a | 550 | if(find_server(NULL, parv[1]) != NULL) |
212380e3 | 551 | { |
212380e3 AC |
552 | ilog(L_SERVER, "Link %s cancelled, server %s already exists", |
553 | client_p->name, parv[1]); | |
554 | ||
5203cba5 | 555 | snprintf(squitreason, sizeof squitreason, |
7d428759 JT |
556 | "Server %s already exists", |
557 | parv[1]); | |
558 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 559 | return; |
212380e3 AC |
560 | } |
561 | ||
562 | /* collision on the SID? */ | |
563 | if((target_p = find_id(parv[3])) != NULL) | |
564 | { | |
8e34ffc6 JT |
565 | sendto_wallops_flags(UMODE_WALLOP, &me, |
566 | "Link %s cancelled, SID %s for server %s already in use by %s", | |
567 | client_p->name, parv[3], parv[1], target_p->name); | |
568 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, | |
569 | ":%s WALLOPS :Link %s cancelled, SID %s for server %s already in use by %s", | |
570 | me.id, client_p->name, parv[3], parv[1], target_p->name); | |
571 | ilog(L_SERVER, "Link %s cancelled, SID %s for server %s already in use by %s", | |
572 | client_p->name, parv[3], parv[1], target_p->name); | |
573 | ||
5203cba5 | 574 | snprintf(squitreason, sizeof squitreason, |
8e34ffc6 JT |
575 | "SID %s for %s already in use by %s", |
576 | parv[3], parv[1], target_p->name); | |
577 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 578 | return; |
212380e3 AC |
579 | } |
580 | ||
581 | if(bogus_host(parv[1]) || strlen(parv[1]) > HOSTLEN) | |
582 | { | |
583 | sendto_one(client_p, "ERROR :Invalid servername"); | |
a9227555 | 584 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 585 | "Link %s cancelled, servername %s invalid", |
b3ebc7ab | 586 | client_p->name, parv[1]); |
212380e3 AC |
587 | ilog(L_SERVER, "Link %s cancelled, servername %s invalid", |
588 | client_p->name, parv[1]); | |
589 | ||
590 | exit_client(NULL, client_p, &me, "Bogus server name"); | |
3c7d6fcc | 591 | return; |
212380e3 AC |
592 | } |
593 | ||
594 | if(!IsDigit(parv[3][0]) || !IsIdChar(parv[3][1]) || | |
595 | !IsIdChar(parv[3][2]) || parv[3][3] != '\0') | |
596 | { | |
597 | sendto_one(client_p, "ERROR :Invalid SID"); | |
a9227555 | 598 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 599 | "Link %s cancelled, SID %s invalid", |
b3ebc7ab | 600 | client_p->name, parv[3]); |
212380e3 AC |
601 | ilog(L_SERVER, "Link %s cancelled, SID %s invalid", |
602 | client_p->name, parv[3]); | |
603 | ||
604 | exit_client(NULL, client_p, &me, "Bogus SID"); | |
3c7d6fcc | 605 | return; |
212380e3 AC |
606 | } |
607 | ||
608 | /* for the directly connected server: | |
609 | * H: allows it to introduce a server matching that mask | |
610 | * L: disallows it introducing a server matching that mask | |
611 | */ | |
5b96d9a6 | 612 | RB_DLINK_FOREACH(ptr, hubleaf_conf_list.head) |
212380e3 AC |
613 | { |
614 | hub_p = ptr->data; | |
615 | ||
616 | if(match(hub_p->server, client_p->name) && match(hub_p->host, parv[1])) | |
617 | { | |
618 | if(hub_p->flags & CONF_HUB) | |
619 | hlined++; | |
620 | else | |
621 | llined++; | |
622 | } | |
623 | } | |
624 | ||
625 | /* no matching hub_mask */ | |
626 | if(!hlined) | |
627 | { | |
a9227555 | 628 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 629 | "Non-Hub link %s introduced %s.", |
b3ebc7ab | 630 | client_p->name, parv[1]); |
212380e3 AC |
631 | ilog(L_SERVER, "Non-Hub link %s introduced %s.", |
632 | client_p->name, parv[1]); | |
8f7ca682 | 633 | |
5203cba5 | 634 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
635 | "No matching hub_mask for %s", |
636 | parv[1]); | |
637 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 638 | return; |
212380e3 AC |
639 | } |
640 | ||
641 | /* matching leaf_mask */ | |
642 | if(llined) | |
643 | { | |
a9227555 | 644 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, |
212380e3 | 645 | "Link %s introduced leafed server %s.", |
b3ebc7ab | 646 | client_p->name, parv[1]); |
212380e3 | 647 | ilog(L_SERVER, "Link %s introduced leafed server %s.", |
55abcbb2 | 648 | client_p->name, parv[1]); |
8f7ca682 | 649 | |
5203cba5 | 650 | snprintf(squitreason, sizeof squitreason, |
8f7ca682 JT |
651 | "Matching leaf_mask for %s", |
652 | parv[1]); | |
653 | exit_client(NULL, client_p, &me, squitreason); | |
3c7d6fcc | 654 | return; |
212380e3 AC |
655 | } |
656 | ||
657 | /* ok, alls good */ | |
658 | target_p = make_client(client_p); | |
659 | make_server(target_p); | |
660 | ||
f427c8b0 | 661 | rb_strlcpy(target_p->name, parv[1], sizeof(target_p->name)); |
212380e3 | 662 | target_p->hopcount = atoi(parv[2]); |
4d5a902f | 663 | rb_strlcpy(target_p->id, parv[3], sizeof(target_p->id)); |
212380e3 AC |
664 | set_server_gecos(target_p, parv[4]); |
665 | ||
212380e3 AC |
666 | target_p->servptr = source_p; |
667 | SetServer(target_p); | |
668 | ||
0e7cb7e6 JT |
669 | rb_dlinkAddTail(target_p, &target_p->node, &global_client_list); |
670 | rb_dlinkAddTailAlloc(target_p, &global_serv_list); | |
212380e3 AC |
671 | add_to_client_hash(target_p->name, target_p); |
672 | add_to_id_hash(target_p->id, target_p); | |
0e7cb7e6 | 673 | rb_dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
212380e3 | 674 | |
994544c2 JT |
675 | target_p->serv->nameinfo = scache_connect(target_p->name, target_p->info, IsHidden(target_p)); |
676 | ||
212380e3 AC |
677 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, |
678 | ":%s SID %s %d %s :%s%s", | |
679 | source_p->id, target_p->name, target_p->hopcount + 1, | |
680 | target_p->id, IsHidden(target_p) ? "(H) " : "", target_p->info); | |
212380e3 AC |
681 | |
682 | sendto_realops_snomask(SNO_EXTERNAL, L_ALL, | |
683 | "Server %s being introduced by %s", target_p->name, source_p->name); | |
684 | ||
685 | /* quick, dirty EOB. you know you love it. */ | |
686 | sendto_one(target_p, ":%s PING %s %s", | |
687 | get_id(&me, target_p), me.name, get_id(target_p, target_p)); | |
688 | ||
689 | hdata.client = source_p; | |
690 | hdata.target = target_p; | |
691 | call_hook(h_server_introduced, &hdata); | |
212380e3 AC |
692 | } |
693 | ||
694 | /* set_server_gecos() | |
695 | * | |
696 | * input - pointer to client | |
697 | * output - none | |
698 | * side effects - servers gecos field is set | |
699 | */ | |
3c7d6fcc | 700 | static void |
212380e3 AC |
701 | set_server_gecos(struct Client *client_p, const char *info) |
702 | { | |
703 | /* check the info for [IP] */ | |
704 | if(info[0]) | |
705 | { | |
706 | char *p; | |
707 | char *s; | |
212380e3 AC |
708 | |
709 | s = LOCAL_COPY(info); | |
710 | ||
711 | /* we should only check the first word for an ip */ | |
712 | if((p = strchr(s, ' '))) | |
713 | *p = '\0'; | |
714 | ||
715 | /* check for a ] which would symbolise an [IP] */ | |
f93bc397 | 716 | if(strchr(s, ']')) |
212380e3 AC |
717 | { |
718 | /* set s to after the first space */ | |
719 | if(p) | |
720 | s = ++p; | |
721 | else | |
722 | s = NULL; | |
723 | } | |
724 | /* no ], put the space back */ | |
725 | else if(p) | |
726 | *p = ' '; | |
727 | ||
728 | /* p may have been set to a trailing space, so check s exists and that | |
729 | * it isnt \0 */ | |
730 | if(s && (*s != '\0')) | |
731 | { | |
732 | /* a space? if not (H) could be the last part of info.. */ | |
733 | if((p = strchr(s, ' '))) | |
734 | *p = '\0'; | |
735 | ||
736 | /* check for (H) which is a hidden server */ | |
737 | if(!strcmp(s, "(H)")) | |
738 | { | |
739 | SetHidden(client_p); | |
740 | ||
741 | /* if there was no space.. theres nothing to set info to */ | |
742 | if(p) | |
743 | s = ++p; | |
744 | else | |
745 | s = NULL; | |
746 | } | |
747 | else if(p) | |
748 | *p = ' '; | |
749 | ||
750 | /* if there was a trailing space, s could point to \0, so check */ | |
751 | if(s && (*s != '\0')) | |
752 | { | |
f427c8b0 | 753 | rb_strlcpy(client_p->info, s, sizeof(client_p->info)); |
3c7d6fcc | 754 | return; |
212380e3 AC |
755 | } |
756 | } | |
757 | } | |
758 | ||
f427c8b0 | 759 | rb_strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
212380e3 AC |
760 | } |
761 | ||
762 | /* | |
763 | * bogus_host | |
764 | * | |
765 | * inputs - hostname | |
3c7d6fcc | 766 | * output - true if a bogus hostname input, false if its valid |
212380e3 AC |
767 | * side effects - none |
768 | */ | |
3c7d6fcc | 769 | static bool |
212380e3 AC |
770 | bogus_host(const char *host) |
771 | { | |
3c7d6fcc | 772 | bool bogus_server = false; |
212380e3 AC |
773 | const char *s; |
774 | int dots = 0; | |
775 | ||
776 | for(s = host; *s; s++) | |
777 | { | |
778 | if(!IsServChar(*s)) | |
779 | { | |
3c7d6fcc | 780 | bogus_server = true; |
212380e3 AC |
781 | break; |
782 | } | |
783 | if('.' == *s) | |
784 | ++dots; | |
785 | } | |
786 | ||
787 | if(!dots || bogus_server) | |
3c7d6fcc | 788 | return true; |
212380e3 | 789 | |
3c7d6fcc | 790 | return false; |
212380e3 | 791 | } |