1 |
/* |
2 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
3 |
* m_server.c: Introduces a server. |
4 |
* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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* $Id$ |
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*/ |
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|
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#include "stdinc.h" |
26 |
#include "handlers.h" /* m_server prototype */ |
27 |
#include "client.h" /* client struct */ |
28 |
#include "common.h" /* TRUE bleah */ |
29 |
#include "hash.h" /* add_to_client_hash_table */ |
30 |
#include "ircd.h" /* me */ |
31 |
#include "numeric.h" /* ERR_xxx */ |
32 |
#include "s_conf.h" /* struct AccessItem */ |
33 |
#include "s_serv.h" /* server_estab, check_server, my_name_for_link */ |
34 |
#include "s_stats.h" /* ServerStats */ |
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#include "send.h" /* sendto_one */ |
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#include "motd.h" |
37 |
#include "msg.h" |
38 |
#include "parse.h" |
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#include "modules.h" |
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|
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|
42 |
static void mr_server(struct Client *, struct Client *, int, char *[]); |
43 |
static void ms_server(struct Client *, struct Client *, int, char *[]); |
44 |
static void ms_sid(struct Client *, struct Client *, int, char *[]); |
45 |
|
46 |
static void set_server_gecos(struct Client *, char *); |
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static struct Client *server_exists(const char *); |
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|
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struct Message server_msgtab = { |
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"SERVER", 0, 0, 4, 0, MFLG_SLOW | MFLG_UNREG, 0, |
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{ mr_server, m_registered, ms_server, m_ignore, m_registered, m_ignore } |
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}; |
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|
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struct Message sid_msgtab = { |
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"SID", 0, 0, 5, 0, MFLG_SLOW, 0, |
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{ m_error, m_ignore, ms_sid, m_ignore, m_ignore, m_ignore } |
57 |
}; |
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|
59 |
INIT_MODULE(m_server, "$Revision$") |
60 |
{ |
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mod_add_cmd(&server_msgtab); |
62 |
mod_add_cmd(&sid_msgtab); |
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} |
64 |
|
65 |
CLEANUP_MODULE |
66 |
{ |
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mod_del_cmd(&server_msgtab); |
68 |
mod_del_cmd(&sid_msgtab); |
69 |
} |
70 |
|
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/* mr_server() |
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* parv[0] = sender prefix |
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* parv[1] = servername |
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* parv[2] = serverinfo/hopcount |
75 |
* parv[3] = serverinfo |
76 |
*/ |
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static void |
78 |
mr_server(struct Client *client_p, struct Client *source_p, |
79 |
int parc, char *parv[]) |
80 |
{ |
81 |
char info[REALLEN + 1]; |
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char *name; |
83 |
struct Client *target_p; |
84 |
int hop; |
85 |
|
86 |
if (parc < 4) |
87 |
{ |
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sendto_one(client_p, "ERROR :No servername"); |
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exit_client(client_p, client_p, "Wrong number of args"); |
90 |
return; |
91 |
} |
92 |
|
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name = parv[1]; |
94 |
hop = atoi(parv[2]); |
95 |
strlcpy(info, parv[3], sizeof(info)); |
96 |
|
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/* Reject a direct nonTS server connection if we're TS_ONLY -orabidoo |
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*/ |
99 |
if (!DoesTS(client_p)) |
100 |
{ |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, "Link %s dropped, non-TS server", |
102 |
get_client_name(client_p, HIDE_IP)); |
103 |
sendto_realops_flags(UMODE_ALL, L_OPER, "Link %s dropped, non-TS server", |
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get_client_name(client_p, MASK_IP)); |
105 |
exit_client(client_p, client_p, "Non-TS server"); |
106 |
return; |
107 |
} |
108 |
|
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if (bogus_host(name)) |
110 |
{ |
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exit_client(client_p, client_p, "Bogus server name"); |
112 |
return; |
113 |
} |
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|
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/* Now we just have to call check_server and everything should |
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* be checked for us... -A1kmm. |
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*/ |
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switch (check_server(name, client_p, CHECK_SERVER_NOCRYPTLINK)) |
119 |
{ |
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case -1: |
121 |
if (ConfigFileEntry.warn_no_nline) |
122 |
{ |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, |
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"Unauthorized server connection attempt from %s: No entry for " |
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"servername %s", get_client_name(client_p, HIDE_IP), name); |
126 |
|
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sendto_realops_flags(UMODE_ALL, L_OPER, |
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"Unauthorized server connection attempt from %s: No entry for " |
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"servername %s", get_client_name(client_p, MASK_IP), name); |
130 |
} |
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|
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exit_client(client_p, client_p, "Invalid servername."); |
133 |
return; |
134 |
/* NOT REACHED */ |
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break; |
136 |
|
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case -2: |
138 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
139 |
"Unauthorized server connection attempt from %s: Bad password " |
140 |
"for server %s", get_client_name(client_p, HIDE_IP), name); |
141 |
|
142 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
143 |
"Unauthorized server connection attempt from %s: Bad password " |
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"for server %s", get_client_name(client_p, MASK_IP), name); |
145 |
|
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exit_client(client_p, client_p, "Invalid password."); |
147 |
return; |
148 |
/* NOT REACHED */ |
149 |
break; |
150 |
|
151 |
case -3: |
152 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
153 |
"Unauthorized server connection attempt from %s: Invalid host " |
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"for server %s", get_client_name(client_p, HIDE_IP), name); |
155 |
|
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sendto_realops_flags(UMODE_ALL, L_OPER, |
157 |
"Unauthorized server connection attempt from %s: Invalid host " |
158 |
"for server %s", get_client_name(client_p, MASK_IP), name); |
159 |
|
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exit_client(client_p, client_p, "Invalid host."); |
161 |
return; |
162 |
/* NOT REACHED */ |
163 |
break; |
164 |
|
165 |
/* servername is > HOSTLEN */ |
166 |
case -4: |
167 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
168 |
"Invalid servername %s from %s", |
169 |
name, get_client_name(client_p, HIDE_IP)); |
170 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
171 |
"Invalid servername %s from %s", |
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name, get_client_name(client_p, MASK_IP)); |
173 |
|
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exit_client(client_p, client_p, "Invalid servername."); |
175 |
return; |
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/* NOT REACHED */ |
177 |
break; |
178 |
} |
179 |
|
180 |
if ((me.id[0] && client_p->id[0] && (target_p = hash_find_id(client_p->id))) |
181 |
|| (target_p = server_exists(name))) |
182 |
{ |
183 |
/* This link is trying feed me a server that I already have |
184 |
* access through another path -- multiple paths not accepted |
185 |
* currently, kill this link immediately!! |
186 |
* |
187 |
* Rather than KILL the link which introduced it, KILL the |
188 |
* youngest of the two links. -avalon |
189 |
* |
190 |
* Definitely don't do that here. This is from an unregistered |
191 |
* connect - A1kmm. |
192 |
*/ |
193 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
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"Attempt to re-introduce server %s SID %s from %s", |
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name, client_p->id, |
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get_client_name(client_p, HIDE_IP)); |
197 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
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"Attempt to re-introduce server %s SID %s from %s", |
199 |
name, client_p->id, |
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get_client_name(client_p, MASK_IP)); |
201 |
sendto_one(client_p, "ERROR :Server ID already exists."); |
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exit_client(client_p, client_p, "Server ID Exists"); |
203 |
return; |
204 |
} |
205 |
|
206 |
/* XXX If somehow there is a connect in progress and |
207 |
* a connect comes in with same name toss the pending one, |
208 |
* but only if it's not the same client! - Dianora |
209 |
*/ |
210 |
if ((target_p = find_servconn_in_progress(name))) |
211 |
if (target_p != client_p) |
212 |
exit_client(target_p, &me, "Overridden"); |
213 |
|
214 |
/* if we are connecting (Handshake), we already have the name from the |
215 |
* connect{} block in client_p->name |
216 |
*/ |
217 |
strlcpy(client_p->name, name, sizeof(client_p->name)); |
218 |
set_server_gecos(client_p, info); |
219 |
client_p->hopcount = hop; |
220 |
server_estab(client_p); |
221 |
} |
222 |
|
223 |
/* ms_server() |
224 |
* parv[0] = sender prefix |
225 |
* parv[1] = servername |
226 |
* parv[2] = serverinfo/hopcount |
227 |
* parv[3] = serverinfo |
228 |
*/ |
229 |
static void |
230 |
ms_server(struct Client *client_p, struct Client *source_p, |
231 |
int parc, char *parv[]) |
232 |
{ |
233 |
char info[REALLEN + 1]; |
234 |
char *name; |
235 |
struct Client *target_p; |
236 |
struct Client *bclient_p; |
237 |
struct ConfItem *conf; |
238 |
struct MatchItem *match_item; |
239 |
int hop; |
240 |
int hlined = 0; |
241 |
int llined = 0; |
242 |
dlink_node *ptr, *ptr_next; |
243 |
|
244 |
/* Just to be sure -A1kmm. */ |
245 |
if (!IsServer(source_p)) |
246 |
return; |
247 |
|
248 |
if (parc < 4) |
249 |
{ |
250 |
sendto_one(client_p, "ERROR :No servername"); |
251 |
return; |
252 |
} |
253 |
|
254 |
name = parv[1]; |
255 |
hop = atoi(parv[2]); |
256 |
strlcpy(info, parv[3], sizeof(info)); |
257 |
|
258 |
if ((target_p = server_exists(name))) |
259 |
{ |
260 |
/* This link is trying feed me a server that I already have |
261 |
* access through another path -- multiple paths not accepted |
262 |
* currently, kill this link immediately!! |
263 |
* |
264 |
* Rather than KILL the link which introduced it, KILL the |
265 |
* youngest of the two links. -avalon |
266 |
* |
267 |
* I think that we should exit the link itself, not the introducer, |
268 |
* and we should always exit the most recently received(i.e. the |
269 |
* one we are receiving this SERVER for. -A1kmm |
270 |
* |
271 |
* You *cant* do this, if you link somewhere, it bursts you a server |
272 |
* that already exists, then sends you a client burst, you squit the |
273 |
* server, but you keep getting the burst of clients on a server that |
274 |
* doesnt exist, although ircd can handle it, its not a realistic |
275 |
* solution.. --fl_ |
276 |
*/ |
277 |
/* It is behind a host-masked server. Completely ignore the |
278 |
* server message(don't propagate or we will delink from whoever |
279 |
* we propagate to). -A1kmm |
280 |
*/ |
281 |
if (irccmp(target_p->name, name) && target_p->from == client_p) |
282 |
return; |
283 |
|
284 |
sendto_one(client_p, "ERROR :Server %s already exists", name); |
285 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
286 |
"Link %s cancelled, server %s already exists", |
287 |
get_client_name(client_p, SHOW_IP), name); |
288 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
289 |
"Link %s cancelled, server %s already exists", |
290 |
client_p->name, name); |
291 |
exit_client(client_p, &me, "Server Exists"); |
292 |
return; |
293 |
} |
294 |
|
295 |
/* XXX If somehow there is a connect in progress and |
296 |
* a connect comes in with same name toss the pending one, |
297 |
* but only if it's not the same client! - Dianora |
298 |
*/ |
299 |
if ((target_p = find_servconn_in_progress(name))) |
300 |
if (target_p != client_p) |
301 |
exit_client(target_p, &me, "Overridden"); |
302 |
|
303 |
/* User nicks never have '.' in them and server names |
304 |
* must always have '.' in them. |
305 |
*/ |
306 |
if (strchr(name, '.') == NULL) |
307 |
{ |
308 |
/* Server trying to use the same name as a person. Would |
309 |
* cause a fair bit of confusion. Enough to make it hellish |
310 |
* for a while and servers to send stuff to the wrong place. |
311 |
*/ |
312 |
sendto_one(client_p,"ERROR :Nickname %s already exists!", name); |
313 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
314 |
"Link %s cancelled: Server/nick collision on %s", |
315 |
/* inpath */ get_client_name(client_p, HIDE_IP), name); |
316 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
317 |
"Link %s cancelled: Server/nick collision on %s", |
318 |
get_client_name(client_p, MASK_IP), name); |
319 |
exit_client(client_p, client_p, "Nick as Server"); |
320 |
return; |
321 |
} |
322 |
|
323 |
if (strlen(name) > HOSTLEN) |
324 |
{ |
325 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
326 |
"Link %s introduced server with invalid servername %s", |
327 |
get_client_name(client_p, HIDE_IP), name); |
328 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
329 |
"Link %s introduced server with invalid servername %s", |
330 |
client_p->name, name); |
331 |
exit_client(client_p, &me, "Invalid servername introduced."); |
332 |
return; |
333 |
} |
334 |
|
335 |
/* Server is informing about a new server behind |
336 |
* this link. Create REMOTE server structure, |
337 |
* add it to list and propagate word to my other |
338 |
* server links... |
339 |
*/ |
340 |
if (parc == 1 || info[0] == '\0') |
341 |
{ |
342 |
sendto_one(client_p, "ERROR :No server info specified for %s", name); |
343 |
return; |
344 |
} |
345 |
|
346 |
/* See if the newly found server is behind a guaranteed |
347 |
* leaf. If so, close the link. |
348 |
*/ |
349 |
DLINK_FOREACH(ptr, leaf_items.head) |
350 |
{ |
351 |
conf = ptr->data; |
352 |
|
353 |
if (match(conf->name, client_p->name)) |
354 |
{ |
355 |
match_item = &conf->conf.MatchItem; |
356 |
if (match(match_item->host, name)) |
357 |
llined++; |
358 |
} |
359 |
} |
360 |
|
361 |
DLINK_FOREACH(ptr, hub_items.head) |
362 |
{ |
363 |
conf = ptr->data; |
364 |
|
365 |
if (match(conf->name, client_p->name)) |
366 |
{ |
367 |
match_item = &conf->conf.MatchItem; |
368 |
|
369 |
if (match(match_item->host, name)) |
370 |
hlined++; |
371 |
} |
372 |
} |
373 |
|
374 |
/* Ok, this way this works is |
375 |
* |
376 |
* A server can have a CONF_HUB allowing it to introduce servers |
377 |
* behind it. |
378 |
* |
379 |
* connect { |
380 |
* name = "irc.bighub.net"; |
381 |
* hub_mask="*"; |
382 |
* ... |
383 |
* |
384 |
* That would allow "irc.bighub.net" to introduce anything it wanted.. |
385 |
* |
386 |
* However |
387 |
* |
388 |
* connect { |
389 |
* name = "irc.somehub.fi"; |
390 |
* hub_mask="*"; |
391 |
* leaf_mask="*.edu"; |
392 |
*... |
393 |
* Would allow this server in finland to hub anything but |
394 |
* .edu's |
395 |
*/ |
396 |
|
397 |
/* Ok, check client_p can hub the new server. */ |
398 |
if (!hlined) |
399 |
{ |
400 |
/* OOOPs nope can't HUB */ |
401 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, "Non-Hub link %s introduced %s.", |
402 |
get_client_name(client_p, HIDE_IP), name); |
403 |
sendto_realops_flags(UMODE_ALL, L_OPER, "Non-Hub link %s introduced %s.", |
404 |
get_client_name(client_p, MASK_IP), name); |
405 |
exit_client(source_p, &me, "No matching hub_mask."); |
406 |
return; |
407 |
} |
408 |
|
409 |
/* Check for the new server being leafed behind this HUB */ |
410 |
if (llined) |
411 |
{ |
412 |
/* OOOPs nope can't HUB this leaf */ |
413 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
414 |
"Link %s introduced leafed server %s.", |
415 |
get_client_name(client_p, HIDE_IP), name); |
416 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
417 |
"Link %s introduced leafed server %s.", |
418 |
client_p->name, name); |
419 |
/* If it is new, we are probably misconfigured, so split the |
420 |
* non-hub server introducing this. Otherwise, split the new |
421 |
* server. -A1kmm. |
422 |
*/ |
423 |
/* wastes too much bandwidth, generates too many errors on |
424 |
* larger networks, dont bother. --fl_ |
425 |
*/ |
426 |
exit_client(client_p, &me, "Leafed Server."); |
427 |
return; |
428 |
} |
429 |
|
430 |
target_p = make_client(client_p); |
431 |
make_server(target_p); |
432 |
target_p->hopcount = hop; |
433 |
|
434 |
strlcpy(target_p->name, name, sizeof(target_p->name)); |
435 |
|
436 |
set_server_gecos(target_p, info); |
437 |
|
438 |
target_p->servptr = source_p; |
439 |
|
440 |
SetServer(target_p); |
441 |
|
442 |
if ((target_p->node.prev != NULL) || (target_p->node.next != NULL)) |
443 |
{ |
444 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
445 |
"already linked %s at %s:%d", target_p->name, |
446 |
__FILE__, __LINE__); |
447 |
ilog(L_ERROR, "already linked client %s at %s:%d", target_p->name, |
448 |
__FILE__, __LINE__); |
449 |
assert(0==1); |
450 |
} |
451 |
else |
452 |
{ |
453 |
dlinkAdd(target_p, &target_p->node, &global_client_list); |
454 |
dlinkAdd(target_p, make_dlink_node(), &global_serv_list); |
455 |
} |
456 |
|
457 |
hash_add_client(target_p); |
458 |
/* XXX test that target_p->lnode.prev and .next are NULL as well? */ |
459 |
if ((target_p->lnode.prev != NULL) || (target_p->lnode.next != NULL)) |
460 |
{ |
461 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
462 |
"already lnode linked %s at %s:%d", target_p->name, |
463 |
__FILE__, __LINE__); |
464 |
ilog(L_ERROR, "already lnode linked %s at %s:%d", target_p->name, |
465 |
__FILE__, __LINE__); |
466 |
assert(0==2); |
467 |
} |
468 |
else |
469 |
dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
470 |
|
471 |
client_p->serv->dep_servers++; |
472 |
|
473 |
/* Old sendto_serv_but_one() call removed because we now |
474 |
* need to send different names to different servers |
475 |
* (domain name matching) |
476 |
*/ |
477 |
DLINK_FOREACH_SAFE(ptr, ptr_next, serv_list.head) |
478 |
{ |
479 |
bclient_p = ptr->data; |
480 |
|
481 |
if (bclient_p == client_p) |
482 |
continue; |
483 |
|
484 |
if ((conf = bclient_p->serv->sconf) == NULL) |
485 |
{ |
486 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
487 |
"Lost connect{} block for %s on %s. Closing", |
488 |
get_client_name(client_p, HIDE_IP), name); |
489 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
490 |
"Lost connect{} block for %s on %s. Closing", |
491 |
get_client_name(client_p, MASK_IP), name); |
492 |
exit_client(client_p, client_p, "Lost connect{} block"); |
493 |
continue; |
494 |
} |
495 |
|
496 |
if (match(my_name_for_link(&conf->conf.AccessItem), target_p->name)) |
497 |
continue; |
498 |
|
499 |
sendto_one(bclient_p, ":%s SERVER %s %d :%s%s", |
500 |
ID_or_name(source_p, bclient_p), target_p->name, hop + 1, |
501 |
IsHidden(target_p) ? "(H) " : "", |
502 |
target_p->info); |
503 |
} |
504 |
|
505 |
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, |
506 |
"Server %s being introduced by %s", |
507 |
target_p->name, source_p->name); |
508 |
} |
509 |
|
510 |
/* ms_sid() |
511 |
* parv[0] = sender prefix |
512 |
* parv[1] = servername |
513 |
* parv[2] = serverinfo/hopcount |
514 |
* parv[3] = sid of new server |
515 |
* parv[4] = serverinfo |
516 |
*/ |
517 |
static void |
518 |
ms_sid(struct Client *client_p, struct Client *source_p, |
519 |
int parc, char *parv[]) |
520 |
{ |
521 |
char info[REALLEN + 1]; |
522 |
struct Client *target_p; |
523 |
struct Client *bclient_p; |
524 |
struct ConfItem *conf; |
525 |
struct MatchItem *match_item; |
526 |
int hlined = 0; |
527 |
int llined = 0; |
528 |
dlink_node *ptr, *ptr_next; |
529 |
int hop; |
530 |
#define SID_NAME parv[1] |
531 |
#define SID_HOP parv[2] |
532 |
#define SID_SID parv[3] |
533 |
#define SID_GECOS parv[4] |
534 |
|
535 |
hop = atoi(SID_HOP); |
536 |
|
537 |
/* Just to be sure -A1kmm. */ |
538 |
if (!IsServer(source_p)) |
539 |
return; |
540 |
|
541 |
strlcpy(info, SID_GECOS, sizeof(info)); |
542 |
|
543 |
/* collision on SID? */ |
544 |
if ((target_p = hash_find_id(SID_SID)) != NULL) |
545 |
{ |
546 |
sendto_one(client_p, "ERROR :SID %s already exists", SID_SID); |
547 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
548 |
"Link %s cancelled, SID %s already exists", |
549 |
get_client_name(client_p, SHOW_IP), SID_SID); |
550 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
551 |
"Link %s cancelled, SID %s already exists", |
552 |
client_p->name, SID_SID); |
553 |
exit_client(client_p, &me, "Server Exists"); |
554 |
return; |
555 |
} |
556 |
|
557 |
/* collision on name? */ |
558 |
if ((target_p = server_exists(SID_NAME)) != NULL) |
559 |
{ |
560 |
sendto_one(client_p, "ERROR :Server %s already exists", SID_NAME); |
561 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
562 |
"Link %s cancelled, server %s already exists", |
563 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
564 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
565 |
"Link %s cancelled, server %s already exists", |
566 |
client_p->name, SID_NAME); |
567 |
exit_client(client_p, &me, "Server Exists"); |
568 |
return; |
569 |
} |
570 |
|
571 |
/* XXX If somehow there is a connect in progress and |
572 |
* a connect comes in with same name toss the pending one, |
573 |
* but only if it's not the same client! - Dianora |
574 |
*/ |
575 |
if ((target_p = find_servconn_in_progress(SID_NAME))) |
576 |
if (target_p != client_p) |
577 |
exit_client(target_p, &me, "Overridden"); |
578 |
|
579 |
/* User nicks never have '.' in them and server names |
580 |
* must always have '.' in them. |
581 |
*/ |
582 |
if (strchr(SID_NAME, '.') == NULL || /* servernames must have a '.' and nicks must not */ |
583 |
strlen(SID_NAME) > HOSTLEN) /* ensure the name of the server is not too long */ |
584 |
{ |
585 |
/* Server trying to use the same name as a person. Would |
586 |
* cause a fair bit of confusion. Enough to make it hellish |
587 |
* for a while and servers to send stuff to the wrong place. |
588 |
*/ |
589 |
sendto_one(client_p, "ERROR :Invalid servername"); |
590 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
591 |
"Link %s cancelled: servername name %s invalid", |
592 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
593 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
594 |
"Link %s cancelled: servername name %s invalid", |
595 |
get_client_name(client_p, MASK_IP), SID_NAME); |
596 |
exit_client(client_p, client_p, "Nick as Server"); |
597 |
return; |
598 |
} |
599 |
|
600 |
/* Server is informing about a new server behind |
601 |
* this link. Create REMOTE server structure, |
602 |
* add it to list and propagate word to my other |
603 |
* server links... |
604 |
*/ |
605 |
if (parc == 1 || info[0] == '\0') |
606 |
{ |
607 |
sendto_one(client_p, "ERROR :No server info specified for %s", SID_NAME); |
608 |
return; |
609 |
} |
610 |
|
611 |
/* See if the newly found server is behind a guaranteed |
612 |
* leaf. If so, close the link. |
613 |
*/ |
614 |
DLINK_FOREACH(ptr, leaf_items.head) |
615 |
{ |
616 |
conf = ptr->data; |
617 |
|
618 |
if (match(conf->name, client_p->name)) |
619 |
{ |
620 |
match_item = &conf->conf.MatchItem; |
621 |
if (match(match_item->host, SID_NAME)) |
622 |
llined++; |
623 |
} |
624 |
} |
625 |
|
626 |
DLINK_FOREACH(ptr, hub_items.head) |
627 |
{ |
628 |
conf = ptr->data; |
629 |
|
630 |
if (match(conf->name, client_p->name)) |
631 |
{ |
632 |
match_item = &conf->conf.MatchItem; |
633 |
|
634 |
if (match(match_item->host, SID_NAME)) |
635 |
hlined++; |
636 |
} |
637 |
} |
638 |
|
639 |
/* Ok, this way this works is |
640 |
* |
641 |
* A server can have a CONF_HUB allowing it to introduce servers |
642 |
* behind it. |
643 |
* |
644 |
* connect { |
645 |
* name = "irc.bighub.net"; |
646 |
* hub_mask="*"; |
647 |
* ... |
648 |
* |
649 |
* That would allow "irc.bighub.net" to introduce anything it wanted.. |
650 |
* |
651 |
* However |
652 |
* |
653 |
* connect { |
654 |
* name = "irc.somehub.fi"; |
655 |
* hub_mask="*"; |
656 |
* leaf_mask="*.edu"; |
657 |
*... |
658 |
* Would allow this server in finland to hub anything but |
659 |
* .edu's |
660 |
*/ |
661 |
|
662 |
/* Ok, check client_p can hub the new server. */ |
663 |
if (!hlined) |
664 |
{ |
665 |
/* OOOPs nope can't HUB */ |
666 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, "Non-Hub link %s introduced %s.", |
667 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
668 |
sendto_realops_flags(UMODE_ALL, L_OPER, "Non-Hub link %s introduced %s.", |
669 |
get_client_name(client_p, MASK_IP), SID_NAME); |
670 |
exit_client(source_p, &me, "No matching hub_mask."); |
671 |
return; |
672 |
} |
673 |
|
674 |
/* Check for the new server being leafed behind this HUB */ |
675 |
if (llined) |
676 |
{ |
677 |
/* OOOPs nope can't HUB this leaf */ |
678 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
679 |
"Link %s introduced leafed server %s.", |
680 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
681 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
682 |
"Link %s introduced leafed server %s.", |
683 |
client_p->name, SID_NAME); |
684 |
exit_client(client_p, &me, "Leafed Server."); |
685 |
return; |
686 |
} |
687 |
|
688 |
target_p = make_client(client_p); |
689 |
make_server(target_p); |
690 |
target_p->hopcount = hop; |
691 |
|
692 |
strlcpy(target_p->name, SID_NAME, sizeof(target_p->name)); |
693 |
strlcpy(target_p->id, SID_SID, sizeof(target_p->id)); |
694 |
|
695 |
set_server_gecos(target_p, info); |
696 |
|
697 |
target_p->servptr = source_p; |
698 |
|
699 |
SetServer(target_p); |
700 |
|
701 |
if ((target_p->node.prev != NULL) || (target_p->node.next != NULL)) |
702 |
{ |
703 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
704 |
"already linked %s at %s:%d", target_p->name, |
705 |
__FILE__, __LINE__); |
706 |
ilog(L_ERROR, "already linked %s at %s:%d", target_p->name, |
707 |
__FILE__, __LINE__); |
708 |
assert(0==3); |
709 |
} |
710 |
else |
711 |
{ |
712 |
dlinkAdd(target_p, &target_p->node, &global_client_list); |
713 |
dlinkAdd(target_p, make_dlink_node(), &global_serv_list); |
714 |
} |
715 |
|
716 |
hash_add_client(target_p); |
717 |
/* XXX test that target_p->lnode.prev and next are NULL as well? */ |
718 |
if ((target_p->lnode.prev != NULL) || (target_p->lnode.next != NULL)) |
719 |
{ |
720 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
721 |
"already lnode linked %s at %s:%d", target_p->name, |
722 |
__FILE__, __LINE__); |
723 |
ilog(L_ERROR, "already lnode linked %s at %s:%d", target_p->name, |
724 |
__FILE__, __LINE__); |
725 |
assert(0==4); |
726 |
} |
727 |
else |
728 |
dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->servers); |
729 |
|
730 |
hash_add_id(target_p); |
731 |
|
732 |
client_p->serv->dep_servers++; |
733 |
|
734 |
DLINK_FOREACH_SAFE(ptr, ptr_next, serv_list.head) |
735 |
{ |
736 |
bclient_p = ptr->data; |
737 |
|
738 |
if (bclient_p == client_p) |
739 |
continue; |
740 |
|
741 |
if ((conf = bclient_p->serv->sconf) == NULL) |
742 |
{ |
743 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
744 |
"Lost connect{} block for %s on %s. Closing", |
745 |
get_client_name(client_p, HIDE_IP), SID_NAME); |
746 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
747 |
"Lost connect{} block for %s on %s. Closing", |
748 |
get_client_name(client_p, MASK_IP), SID_NAME); |
749 |
exit_client(client_p, client_p, "Lost connect{} block"); |
750 |
continue; |
751 |
} |
752 |
|
753 |
if (match(my_name_for_link(&conf->conf.AccessItem), target_p->name)) |
754 |
continue; |
755 |
|
756 |
if (IsCapable(bclient_p, CAP_TS6)) |
757 |
sendto_one(bclient_p, ":%s SID %s %d %s :%s%s", |
758 |
ID_or_name(source_p, client_p), target_p->name, hop + 1, |
759 |
SID_SID, IsHidden(target_p) ? "(H) " : "", |
760 |
target_p->info); |
761 |
else |
762 |
sendto_one(bclient_p, ":%s SERVER %s %d :%s%s", |
763 |
source_p->name, target_p->name, hop + 1, |
764 |
IsHidden(target_p) ? "(H) " : "", |
765 |
target_p->info); |
766 |
} |
767 |
|
768 |
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, |
769 |
"Server %s being introduced by %s", |
770 |
target_p->name, source_p->name); |
771 |
} |
772 |
|
773 |
/* set_server_gecos() |
774 |
* |
775 |
* input - pointer to client |
776 |
* output - NONE |
777 |
* side effects - servers gecos field is set |
778 |
*/ |
779 |
static void |
780 |
set_server_gecos(struct Client *client_p, char *info) |
781 |
{ |
782 |
/* check the info for [IP] */ |
783 |
if (info[0]) |
784 |
{ |
785 |
char *p; |
786 |
char *s; |
787 |
char *t; |
788 |
|
789 |
s = info; |
790 |
|
791 |
/* we should only check the first word for an ip */ |
792 |
if ((p = strchr(s, ' ')) != NULL) |
793 |
*p = '\0'; |
794 |
|
795 |
/* check for a ] which would symbolise an [IP] */ |
796 |
if ((t = strchr(s, ']')) != NULL) |
797 |
{ |
798 |
/* set s to after the first space */ |
799 |
if (p) |
800 |
s = ++p; |
801 |
else |
802 |
s = NULL; |
803 |
} |
804 |
/* no ], put the space back */ |
805 |
else if (p) |
806 |
*p = ' '; |
807 |
|
808 |
/* p may have been set to a trailing space, so check s exists and that |
809 |
* it isnt \0 */ |
810 |
if (s && (*s != '\0')) |
811 |
{ |
812 |
/* a space? if not (H) could be the last part of info.. */ |
813 |
if ((p = strchr(s, ' '))) |
814 |
*p = '\0'; |
815 |
|
816 |
/* check for (H) which is a hidden server */ |
817 |
if (!strcmp(s, "(H)")) |
818 |
{ |
819 |
SetHidden(client_p); |
820 |
|
821 |
/* if there was no space.. theres nothing to set info to */ |
822 |
if (p) |
823 |
s = ++p; |
824 |
else |
825 |
s = NULL; |
826 |
} |
827 |
else if (p) |
828 |
*p = ' '; |
829 |
|
830 |
/* if there was a trailing space, s could point to \0, so check */ |
831 |
if (s && (*s != '\0')) |
832 |
strlcpy(client_p->info, s, sizeof(client_p->info)); |
833 |
else |
834 |
strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
835 |
} |
836 |
else |
837 |
strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
838 |
} |
839 |
else |
840 |
strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
841 |
} |
842 |
|
843 |
/* server_exists() |
844 |
* |
845 |
* inputs - servername |
846 |
* output - 1 if server exists, 0 if doesnt exist |
847 |
*/ |
848 |
static struct Client * |
849 |
server_exists(const char *servername) |
850 |
{ |
851 |
dlink_node *ptr = NULL; |
852 |
|
853 |
DLINK_FOREACH(ptr, global_serv_list.head) |
854 |
{ |
855 |
struct Client *target_p = ptr->data; |
856 |
|
857 |
if (match(target_p->name, servername) || |
858 |
match(servername, target_p->name)) |
859 |
return target_p; |
860 |
} |
861 |
|
862 |
return NULL; |
863 |
} |