1 |
/* |
2 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* 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 "tools.h" |
27 |
#include "handlers.h" /* m_server prototype */ |
28 |
#include "client.h" /* client struct */ |
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#include "common.h" /* TRUE bleah */ |
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#include "event.h" |
31 |
#include "hash.h" /* add_to_client_hash_table */ |
32 |
#include "irc_string.h" |
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#include "ircd.h" /* me */ |
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#include "list.h" /* make_server */ |
35 |
#include "numeric.h" /* ERR_xxx */ |
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#include "s_conf.h" /* struct AccessItem */ |
37 |
#include "s_log.h" /* log level defines */ |
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#include "s_serv.h" /* server_estab, check_server, my_name_for_link */ |
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#include "send.h" /* sendto_one */ |
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#include "motd.h" |
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#include "msg.h" |
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#include "parse.h" |
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#include "modules.h" |
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|
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|
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static void mr_server(struct Client *, struct Client *, int, char **); |
47 |
static void ms_server(struct Client *, struct Client *, int, char **); |
48 |
static void ms_sid(struct Client *, struct Client *, int, char **); |
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|
50 |
static int bogus_host(char *host); |
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static void set_server_gecos(struct Client *, char *); |
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static struct Client *server_exists(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} |
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}; |
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|
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#ifndef STATIC_MODULES |
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void |
66 |
_modinit(void) |
67 |
{ |
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mod_add_cmd(&server_msgtab); |
69 |
mod_add_cmd(&sid_msgtab); |
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} |
71 |
|
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void |
73 |
_moddeinit(void) |
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{ |
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mod_del_cmd(&server_msgtab); |
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mod_del_cmd(&sid_msgtab); |
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} |
78 |
|
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const char *_version = "$Revision$"; |
80 |
#endif |
81 |
|
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|
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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 |
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* parv[3] = serverinfo |
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*/ |
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static void |
90 |
mr_server(struct Client *client_p, struct Client *source_p, |
91 |
int parc, char *parv[]) |
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{ |
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char info[REALLEN + 1]; |
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char *name; |
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struct Client *target_p; |
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int hop; |
97 |
|
98 |
if (parc < 4) |
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{ |
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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"); |
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return; |
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} |
104 |
|
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name = parv[1]; |
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hop = atoi(parv[2]); |
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strlcpy(info, parv[3], sizeof(info)); |
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|
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/* Reject a direct nonTS server connection if we're TS_ONLY -orabidoo |
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*/ |
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if (!DoesTS(client_p)) |
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{ |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, "Link %s dropped, non-TS server", |
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get_client_name(client_p, HIDE_IP)); |
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sendto_realops_flags(UMODE_ALL, L_OPER, "Link %s dropped, non-TS server", |
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get_client_name(client_p, MASK_IP)); |
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exit_client(client_p, client_p, "Non-TS server"); |
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return; |
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} |
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|
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if (bogus_host(name)) |
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{ |
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exit_client(client_p, client_p, "Bogus server name"); |
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return; |
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} |
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|
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/* Now we just have to call check_server and everything should |
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* be check for us... -A1kmm. |
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*/ |
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switch (check_server(name, client_p, CHECK_SERVER_NOCRYPTLINK)) |
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{ |
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case -1: |
133 |
if (ConfigFileEntry.warn_no_nline) |
134 |
{ |
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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); |
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|
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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); |
142 |
} |
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|
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exit_client(client_p, client_p, "Invalid servername."); |
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return; |
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/* NOT REACHED */ |
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break; |
148 |
|
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case -2: |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, |
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"Unauthorized server connection attempt from %s: Bad password " |
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"for server %s", get_client_name(client_p, HIDE_IP), name); |
153 |
|
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sendto_realops_flags(UMODE_ALL, L_OPER, |
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"Unauthorized server connection attempt from %s: Bad password " |
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"for server %s", get_client_name(client_p, MASK_IP), name); |
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|
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exit_client(client_p, client_p, "Invalid password."); |
159 |
return; |
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/* NOT REACHED */ |
161 |
break; |
162 |
|
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case -3: |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, |
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"Unauthorized server connection attempt from %s: Invalid host " |
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"for server %s", get_client_name(client_p, HIDE_IP), name); |
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|
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sendto_realops_flags(UMODE_ALL, L_OPER, |
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"Unauthorized server connection attempt from %s: Invalid host " |
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"for server %s", get_client_name(client_p, MASK_IP), name); |
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|
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exit_client(client_p, client_p, "Invalid host."); |
173 |
return; |
174 |
/* NOT REACHED */ |
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break; |
176 |
|
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/* servername is > HOSTLEN */ |
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case -4: |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, |
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"Invalid servername %s from %s", |
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name, get_client_name(client_p, HIDE_IP)); |
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sendto_realops_flags(UMODE_ALL, L_OPER, |
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"Invalid servername %s from %s", |
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name, get_client_name(client_p, MASK_IP)); |
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|
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exit_client(client_p, client_p, "Invalid servername."); |
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return; |
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/* NOT REACHED */ |
189 |
break; |
190 |
} |
191 |
|
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if ((me.id[0] && client_p->id[0] && (target_p = hash_find_id(client_p->id))) |
193 |
|| (target_p = server_exists(name))) |
194 |
{ |
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/* This link is trying feed me a server that I already have |
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* access through another path -- multiple paths not accepted |
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* currently, kill this link immediately!! |
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* |
199 |
* Rather than KILL the link which introduced it, KILL the |
200 |
* youngest of the two links. -avalon |
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* |
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* Definitely don't do that here. This is from an unregistered |
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* connect - A1kmm. |
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*/ |
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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)); |
209 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
210 |
"Attempt to re-introduce server %s SID %s from %s", |
211 |
name, client_p->id, |
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get_client_name(client_p, MASK_IP)); |
213 |
sendto_one(client_p, "ERROR :Server ID already exists."); |
214 |
exit_client(client_p, client_p, "Server ID Exists"); |
215 |
return; |
216 |
} |
217 |
|
218 |
/* XXX If somehow there is a connect in progress and |
219 |
* a connect comes in with same name toss the pending one, |
220 |
* but only if it's not the same client! - Dianora |
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*/ |
222 |
if ((target_p = find_servconn_in_progress(name))) |
223 |
if (target_p != client_p) |
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exit_client(target_p, &me, "Overridden"); |
225 |
|
226 |
/* if we are connecting (Handshake), we already have the name from the |
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* connect{} block in client_p->name |
228 |
*/ |
229 |
strlcpy(client_p->name, name, sizeof(client_p->name)); |
230 |
set_server_gecos(client_p, info); |
231 |
client_p->hopcount = hop; |
232 |
server_estab(client_p); |
233 |
} |
234 |
|
235 |
/* ms_server() |
236 |
* parv[0] = sender prefix |
237 |
* parv[1] = servername |
238 |
* parv[2] = serverinfo/hopcount |
239 |
* parv[3] = serverinfo |
240 |
*/ |
241 |
static void |
242 |
ms_server(struct Client *client_p, struct Client *source_p, |
243 |
int parc, char *parv[]) |
244 |
{ |
245 |
char info[REALLEN + 1]; |
246 |
char *name; |
247 |
struct Client *target_p; |
248 |
struct Client *bclient_p; |
249 |
struct ConfItem *conf; |
250 |
struct MatchItem *match_item; |
251 |
int hop; |
252 |
int hlined = 0; |
253 |
int llined = 0; |
254 |
dlink_node *ptr, *ptr_next; |
255 |
|
256 |
/* Just to be sure -A1kmm. */ |
257 |
if (!IsServer(source_p)) |
258 |
return; |
259 |
|
260 |
if (parc < 4) |
261 |
{ |
262 |
sendto_one(client_p, "ERROR :No servername"); |
263 |
return; |
264 |
} |
265 |
|
266 |
name = parv[1]; |
267 |
hop = atoi(parv[2]); |
268 |
strlcpy(info, parv[3], sizeof(info)); |
269 |
|
270 |
if ((target_p = server_exists(name))) |
271 |
{ |
272 |
/* This link is trying feed me a server that I already have |
273 |
* access through another path -- multiple paths not accepted |
274 |
* currently, kill this link immediately!! |
275 |
* |
276 |
* Rather than KILL the link which introduced it, KILL the |
277 |
* youngest of the two links. -avalon |
278 |
* |
279 |
* I think that we should exit the link itself, not the introducer, |
280 |
* and we should always exit the most recently received(i.e. the |
281 |
* one we are receiving this SERVER for. -A1kmm |
282 |
* |
283 |
* You *cant* do this, if you link somewhere, it bursts you a server |
284 |
* that already exists, then sends you a client burst, you squit the |
285 |
* server, but you keep getting the burst of clients on a server that |
286 |
* doesnt exist, although ircd can handle it, its not a realistic |
287 |
* solution.. --fl_ |
288 |
*/ |
289 |
/* It is behind a host-masked server. Completely ignore the |
290 |
* server message(don't propagate or we will delink from whoever |
291 |
* we propagate to). -A1kmm |
292 |
*/ |
293 |
if (irccmp(target_p->name, name) && target_p->from == client_p) |
294 |
return; |
295 |
|
296 |
sendto_one(client_p, "ERROR :Server %s already exists", name); |
297 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
298 |
"Link %s cancelled, server %s already exists", |
299 |
get_client_name(client_p, SHOW_IP), name); |
300 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
301 |
"Link %s cancelled, server %s already exists", |
302 |
client_p->name, name); |
303 |
exit_client(client_p, &me, "Server Exists"); |
304 |
return; |
305 |
} |
306 |
|
307 |
/* XXX If somehow there is a connect in progress and |
308 |
* a connect comes in with same name toss the pending one, |
309 |
* but only if it's not the same client! - Dianora |
310 |
*/ |
311 |
if ((target_p = find_servconn_in_progress(name))) |
312 |
if (target_p != client_p) |
313 |
exit_client(target_p, &me, "Overridden"); |
314 |
|
315 |
/* User nicks never have '.' in them and server names |
316 |
* must always have '.' in them. |
317 |
*/ |
318 |
if (strchr(name, '.') == NULL) |
319 |
{ |
320 |
/* Server trying to use the same name as a person. Would |
321 |
* cause a fair bit of confusion. Enough to make it hellish |
322 |
* for a while and servers to send stuff to the wrong place. |
323 |
*/ |
324 |
sendto_one(client_p,"ERROR :Nickname %s already exists!", name); |
325 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
326 |
"Link %s cancelled: Server/nick collision on %s", |
327 |
/* inpath */ get_client_name(client_p, HIDE_IP), name); |
328 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
329 |
"Link %s cancelled: Server/nick collision on %s", |
330 |
get_client_name(client_p, MASK_IP), name); |
331 |
exit_client(client_p, client_p, "Nick as Server"); |
332 |
return; |
333 |
} |
334 |
|
335 |
if (strlen(name) > HOSTLEN) |
336 |
{ |
337 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
338 |
"Link %s introduced server with invalid servername %s", |
339 |
get_client_name(client_p, HIDE_IP), name); |
340 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
341 |
"Link %s introduced server with invalid servername %s", |
342 |
client_p->name, name); |
343 |
exit_client(client_p, &me, "Invalid servername introduced."); |
344 |
return; |
345 |
} |
346 |
|
347 |
/* Server is informing about a new server behind |
348 |
* this link. Create REMOTE server structure, |
349 |
* add it to list and propagate word to my other |
350 |
* server links... |
351 |
*/ |
352 |
if (parc == 1 || info[0] == '\0') |
353 |
{ |
354 |
sendto_one(client_p, "ERROR :No server info specified for %s", name); |
355 |
return; |
356 |
} |
357 |
|
358 |
/* See if the newly found server is behind a guaranteed |
359 |
* leaf. If so, close the link. |
360 |
*/ |
361 |
DLINK_FOREACH(ptr, leaf_items.head) |
362 |
{ |
363 |
conf = ptr->data; |
364 |
|
365 |
if (match(conf->name, client_p->name)) |
366 |
{ |
367 |
match_item = (struct MatchItem *)map_to_conf(conf); |
368 |
if (match(match_item->host, name)) |
369 |
llined++; |
370 |
} |
371 |
} |
372 |
|
373 |
DLINK_FOREACH(ptr, hub_items.head) |
374 |
{ |
375 |
conf = ptr->data; |
376 |
|
377 |
if (match(conf->name, client_p->name)) |
378 |
{ |
379 |
match_item = (struct MatchItem *)map_to_conf(conf); |
380 |
|
381 |
if (match(match_item->host, name)) |
382 |
hlined++; |
383 |
} |
384 |
} |
385 |
|
386 |
/* Ok, this way this works is |
387 |
* |
388 |
* A server can have a CONF_HUB allowing it to introduce servers |
389 |
* behind it. |
390 |
* |
391 |
* connect { |
392 |
* name = "irc.bighub.net"; |
393 |
* hub_mask="*"; |
394 |
* ... |
395 |
* |
396 |
* That would allow "irc.bighub.net" to introduce anything it wanted.. |
397 |
* |
398 |
* However |
399 |
* |
400 |
* connect { |
401 |
* name = "irc.somehub.fi"; |
402 |
* hub_mask="*"; |
403 |
* leaf_mask="*.edu"; |
404 |
*... |
405 |
* Would allow this server in finland to hub anything but |
406 |
* .edu's |
407 |
*/ |
408 |
|
409 |
/* Ok, check client_p can hub the new server */ |
410 |
if (!hlined) |
411 |
{ |
412 |
/* OOOPs nope can't HUB */ |
413 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, "Non-Hub link %s introduced %s.", |
414 |
get_client_name(client_p, HIDE_IP), name); |
415 |
sendto_realops_flags(UMODE_ALL, L_OPER, "Non-Hub link %s introduced %s.", |
416 |
get_client_name(client_p, MASK_IP), name); |
417 |
exit_client(source_p, &me, "No matching hub_mask."); |
418 |
return; |
419 |
} |
420 |
|
421 |
/* Check for the new server being leafed behind this HUB */ |
422 |
if (llined) |
423 |
{ |
424 |
/* OOOPs nope can't HUB this leaf */ |
425 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
426 |
"Link %s introduced leafed server %s.", |
427 |
get_client_name(client_p, HIDE_IP), name); |
428 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
429 |
"Link %s introduced leafed server %s.", |
430 |
client_p->name, name); |
431 |
/* If it is new, we are probably misconfigured, so split the |
432 |
* non-hub server introducing this. Otherwise, split the new |
433 |
* server. -A1kmm. |
434 |
*/ |
435 |
/* wastes too much bandwidth, generates too many errors on |
436 |
* larger networks, dont bother. --fl_ |
437 |
*/ |
438 |
exit_client(client_p, &me, "Leafed Server."); |
439 |
return; |
440 |
} |
441 |
|
442 |
target_p = make_client(client_p); |
443 |
make_server(target_p); |
444 |
target_p->hopcount = hop; |
445 |
|
446 |
strlcpy(target_p->name, name, sizeof(target_p->name)); |
447 |
|
448 |
set_server_gecos(target_p, info); |
449 |
|
450 |
target_p->servptr = source_p; |
451 |
|
452 |
SetServer(target_p); |
453 |
|
454 |
if ((target_p->node.prev != NULL) || (target_p->node.next != NULL)) |
455 |
{ |
456 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
457 |
"already linked %s at %s:%d", target_p->name, |
458 |
__FILE__, __LINE__); |
459 |
ilog(L_ERROR, "already linked client %s at %s:%d", target_p->name, |
460 |
__FILE__, __LINE__); |
461 |
assert(0==1); |
462 |
} |
463 |
else |
464 |
{ |
465 |
dlinkAdd(target_p, &target_p->node, &global_client_list); |
466 |
dlinkAdd(target_p, make_dlink_node(), &global_serv_list); |
467 |
} |
468 |
|
469 |
hash_add_client(target_p); |
470 |
/* XXX test that target_p->lnode.prev and .next are NULL as well? */ |
471 |
if ((target_p->lnode.prev != NULL) || (target_p->lnode.next != NULL)) |
472 |
{ |
473 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
474 |
"already lnode linked %s at %s:%d", target_p->name, |
475 |
__FILE__, __LINE__); |
476 |
ilog(L_ERROR, "already lnode linked %s at %s:%d", target_p->name, |
477 |
__FILE__, __LINE__); |
478 |
assert(0==2); |
479 |
} |
480 |
else |
481 |
dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->server_list); |
482 |
|
483 |
/* Old sendto_serv_but_one() call removed because we now |
484 |
* need to send different names to different servers |
485 |
* (domain name matching) |
486 |
*/ |
487 |
DLINK_FOREACH_SAFE(ptr, ptr_next, serv_list.head) |
488 |
{ |
489 |
bclient_p = ptr->data; |
490 |
|
491 |
if (bclient_p == client_p) |
492 |
continue; |
493 |
|
494 |
if ((conf = bclient_p->serv->sconf) == NULL) |
495 |
{ |
496 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
497 |
"Lost connect{} block for %s on %s. Closing", |
498 |
get_client_name(client_p, HIDE_IP), name); |
499 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
500 |
"Lost connect{} block for %s on %s. Closing", |
501 |
get_client_name(client_p, MASK_IP), name); |
502 |
exit_client(client_p, client_p, "Lost connect{} block"); |
503 |
continue; |
504 |
} |
505 |
|
506 |
if (match(my_name_for_link(conf), target_p->name)) |
507 |
continue; |
508 |
|
509 |
sendto_one(bclient_p, ":%s SERVER %s %d :%s%s", |
510 |
ID_or_name(source_p, bclient_p), target_p->name, hop + 1, |
511 |
IsHidden(target_p) ? "(H) " : "", |
512 |
target_p->info); |
513 |
} |
514 |
|
515 |
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, |
516 |
"Server %s being introduced by %s", |
517 |
target_p->name, source_p->name); |
518 |
} |
519 |
|
520 |
/* ms_sid() |
521 |
* parv[0] = sender prefix |
522 |
* parv[1] = servername |
523 |
* parv[2] = serverinfo/hopcount |
524 |
* parv[3] = sid of new server |
525 |
* parv[4] = serverinfo |
526 |
*/ |
527 |
static void |
528 |
ms_sid(struct Client *client_p, struct Client *source_p, |
529 |
int parc, char *parv[]) |
530 |
{ |
531 |
char info[REALLEN + 1]; |
532 |
struct Client *target_p; |
533 |
struct Client *bclient_p; |
534 |
struct ConfItem *conf; |
535 |
struct MatchItem *match_item; |
536 |
int hlined = 0; |
537 |
int llined = 0; |
538 |
dlink_node *ptr, *ptr_next; |
539 |
int hop; |
540 |
#define SID_NAME parv[1] |
541 |
#define SID_HOP parv[2] |
542 |
#define SID_SID parv[3] |
543 |
#define SID_GECOS parv[4] |
544 |
|
545 |
hop = atoi(SID_HOP); |
546 |
|
547 |
/* Just to be sure -A1kmm. */ |
548 |
if (!IsServer(source_p)) |
549 |
return; |
550 |
|
551 |
strlcpy(info, SID_GECOS, sizeof(info)); |
552 |
|
553 |
/* collision on SID? */ |
554 |
if ((target_p = hash_find_id(SID_SID)) != NULL) |
555 |
{ |
556 |
sendto_one(client_p, "ERROR :SID %s already exists", SID_SID); |
557 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
558 |
"Link %s cancelled, SID %s already exists", |
559 |
get_client_name(client_p, SHOW_IP), SID_SID); |
560 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
561 |
"Link %s cancelled, SID %s already exists", |
562 |
client_p->name, SID_SID); |
563 |
exit_client(client_p, &me, "Server Exists"); |
564 |
return; |
565 |
} |
566 |
|
567 |
/* collision on name? */ |
568 |
if ((target_p = server_exists(SID_NAME)) != NULL) |
569 |
{ |
570 |
sendto_one(client_p, "ERROR :Server %s already exists", SID_NAME); |
571 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
572 |
"Link %s cancelled, server %s already exists", |
573 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
574 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
575 |
"Link %s cancelled, server %s already exists", |
576 |
client_p->name, SID_NAME); |
577 |
exit_client(client_p, &me, "Server Exists"); |
578 |
return; |
579 |
} |
580 |
|
581 |
/* XXX If somehow there is a connect in progress and |
582 |
* a connect comes in with same name toss the pending one, |
583 |
* but only if it's not the same client! - Dianora |
584 |
*/ |
585 |
if ((target_p = find_servconn_in_progress(SID_NAME))) |
586 |
if (target_p != client_p) |
587 |
exit_client(target_p, &me, "Overridden"); |
588 |
|
589 |
/* User nicks never have '.' in them and server names |
590 |
* must always have '.' in them. |
591 |
*/ |
592 |
if (strchr(SID_NAME, '.') == NULL || /* servernames must have a '.' and nicks must not */ |
593 |
strlen(SID_NAME) > HOSTLEN) /* ensure the name of the server is not too long */ |
594 |
{ |
595 |
/* Server trying to use the same name as a person. Would |
596 |
* cause a fair bit of confusion. Enough to make it hellish |
597 |
* for a while and servers to send stuff to the wrong place. |
598 |
*/ |
599 |
sendto_one(client_p, "ERROR :Invalid servername"); |
600 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
601 |
"Link %s cancelled: servername name %s invalid", |
602 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
603 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
604 |
"Link %s cancelled: servername name %s invalid", |
605 |
get_client_name(client_p, MASK_IP), SID_NAME); |
606 |
exit_client(client_p, client_p, "Nick as Server"); |
607 |
return; |
608 |
} |
609 |
|
610 |
/* Server is informing about a new server behind |
611 |
* this link. Create REMOTE server structure, |
612 |
* add it to list and propagate word to my other |
613 |
* server links... |
614 |
*/ |
615 |
if (parc == 1 || info[0] == '\0') |
616 |
{ |
617 |
sendto_one(client_p, "ERROR :No server info specified for %s", SID_NAME); |
618 |
return; |
619 |
} |
620 |
|
621 |
/* See if the newly found server is behind a guaranteed |
622 |
* leaf. If so, close the link. |
623 |
*/ |
624 |
DLINK_FOREACH(ptr, leaf_items.head) |
625 |
{ |
626 |
conf = ptr->data; |
627 |
|
628 |
if (match(conf->name, client_p->name)) |
629 |
{ |
630 |
match_item = (struct MatchItem *)map_to_conf(conf); |
631 |
if (match(match_item->host, SID_NAME)) |
632 |
llined++; |
633 |
} |
634 |
} |
635 |
|
636 |
DLINK_FOREACH(ptr, hub_items.head) |
637 |
{ |
638 |
conf = ptr->data; |
639 |
|
640 |
if (match(conf->name, client_p->name)) |
641 |
{ |
642 |
match_item = (struct MatchItem *)map_to_conf(conf); |
643 |
|
644 |
if (match(match_item->host, SID_NAME)) |
645 |
hlined++; |
646 |
} |
647 |
} |
648 |
|
649 |
/* Ok, this way this works is |
650 |
* |
651 |
* A server can have a CONF_HUB allowing it to introduce servers |
652 |
* behind it. |
653 |
* |
654 |
* connect { |
655 |
* name = "irc.bighub.net"; |
656 |
* hub_mask="*"; |
657 |
* ... |
658 |
* |
659 |
* That would allow "irc.bighub.net" to introduce anything it wanted.. |
660 |
* |
661 |
* However |
662 |
* |
663 |
* connect { |
664 |
* name = "irc.somehub.fi"; |
665 |
* hub_mask="*"; |
666 |
* leaf_mask="*.edu"; |
667 |
*... |
668 |
* Would allow this server in finland to hub anything but |
669 |
* .edu's |
670 |
*/ |
671 |
|
672 |
/* Ok, check client_p can hub the new server, and make sure it's not a LL */ |
673 |
if (!hlined) |
674 |
{ |
675 |
/* OOOPs nope can't HUB */ |
676 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, "Non-Hub link %s introduced %s.", |
677 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
678 |
sendto_realops_flags(UMODE_ALL, L_OPER, "Non-Hub link %s introduced %s.", |
679 |
get_client_name(client_p, MASK_IP), SID_NAME); |
680 |
exit_client(source_p, &me, "No matching hub_mask."); |
681 |
return; |
682 |
} |
683 |
|
684 |
/* Check for the new server being leafed behind this HUB */ |
685 |
if (llined) |
686 |
{ |
687 |
/* OOOPs nope can't HUB this leaf */ |
688 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
689 |
"Link %s introduced leafed server %s.", |
690 |
get_client_name(client_p, SHOW_IP), SID_NAME); |
691 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
692 |
"Link %s introduced leafed server %s.", |
693 |
client_p->name, SID_NAME); |
694 |
exit_client(client_p, &me, "Leafed Server."); |
695 |
return; |
696 |
} |
697 |
|
698 |
target_p = make_client(client_p); |
699 |
make_server(target_p); |
700 |
target_p->hopcount = hop; |
701 |
|
702 |
strlcpy(target_p->name, SID_NAME, sizeof(target_p->name)); |
703 |
strlcpy(target_p->id, SID_SID, sizeof(target_p->id)); |
704 |
|
705 |
set_server_gecos(target_p, info); |
706 |
|
707 |
target_p->servptr = source_p; |
708 |
|
709 |
SetServer(target_p); |
710 |
|
711 |
if ((target_p->node.prev != NULL) || (target_p->node.next != NULL)) |
712 |
{ |
713 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
714 |
"already linked %s at %s:%d", target_p->name, |
715 |
__FILE__, __LINE__); |
716 |
ilog(L_ERROR, "already linked %s at %s:%d", target_p->name, |
717 |
__FILE__, __LINE__); |
718 |
assert(0==3); |
719 |
} |
720 |
else |
721 |
{ |
722 |
dlinkAdd(target_p, &target_p->node, &global_client_list); |
723 |
dlinkAdd(target_p, make_dlink_node(), &global_serv_list); |
724 |
} |
725 |
|
726 |
hash_add_client(target_p); |
727 |
/* XXX test that target_p->lnode.prev and next are NULL as well? */ |
728 |
if ((target_p->lnode.prev != NULL) || (target_p->lnode.next != NULL)) |
729 |
{ |
730 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
731 |
"already lnode linked %s at %s:%d", target_p->name, |
732 |
__FILE__, __LINE__); |
733 |
ilog(L_ERROR, "already lnode linked %s at %s:%d", target_p->name, |
734 |
__FILE__, __LINE__); |
735 |
assert(0==4); |
736 |
} |
737 |
else |
738 |
dlinkAdd(target_p, &target_p->lnode, &target_p->servptr->serv->server_list); |
739 |
|
740 |
hash_add_id(target_p); |
741 |
|
742 |
DLINK_FOREACH_SAFE(ptr, ptr_next, serv_list.head) |
743 |
{ |
744 |
bclient_p = ptr->data; |
745 |
|
746 |
if (bclient_p == client_p) |
747 |
continue; |
748 |
|
749 |
if ((conf = bclient_p->serv->sconf) == NULL) |
750 |
{ |
751 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
752 |
"Lost connect{} block for %s on %s. Closing", |
753 |
get_client_name(client_p, HIDE_IP), SID_NAME); |
754 |
sendto_realops_flags(UMODE_ALL, L_OPER, |
755 |
"Lost connect{} block for %s on %s. Closing", |
756 |
get_client_name(client_p, MASK_IP), SID_NAME); |
757 |
exit_client(client_p, client_p, "Lost connect{} block"); |
758 |
continue; |
759 |
} |
760 |
|
761 |
if (match(my_name_for_link(conf), target_p->name)) |
762 |
continue; |
763 |
|
764 |
if (IsCapable(bclient_p, CAP_TS6)) |
765 |
sendto_one(bclient_p, ":%s SID %s %d %s :%s%s", |
766 |
ID_or_name(source_p, client_p), target_p->name, hop + 1, |
767 |
SID_SID, IsHidden(target_p) ? "(H) " : "", |
768 |
target_p->info); |
769 |
else |
770 |
sendto_one(bclient_p, ":%s SERVER %s %d :%s%s", |
771 |
source_p->name, target_p->name, hop + 1, |
772 |
IsHidden(target_p) ? "(H) " : "", |
773 |
target_p->info); |
774 |
} |
775 |
|
776 |
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, |
777 |
"Server %s being introduced by %s", |
778 |
target_p->name, source_p->name); |
779 |
} |
780 |
|
781 |
/* set_server_gecos() |
782 |
* |
783 |
* input - pointer to client |
784 |
* output - NONE |
785 |
* side effects - servers gecos field is set |
786 |
*/ |
787 |
static void |
788 |
set_server_gecos(struct Client *client_p, char *info) |
789 |
{ |
790 |
/* check the info for [IP] */ |
791 |
if (info[0]) |
792 |
{ |
793 |
char *p; |
794 |
char *s; |
795 |
char *t; |
796 |
|
797 |
s = info; |
798 |
|
799 |
/* we should only check the first word for an ip */ |
800 |
if ((p = strchr(s, ' ')) != NULL) |
801 |
*p = '\0'; |
802 |
|
803 |
/* check for a ] which would symbolise an [IP] */ |
804 |
if ((t = strchr(s, ']')) != NULL) |
805 |
{ |
806 |
/* set s to after the first space */ |
807 |
if (p) |
808 |
s = ++p; |
809 |
else |
810 |
s = NULL; |
811 |
} |
812 |
/* no ], put the space back */ |
813 |
else if (p) |
814 |
*p = ' '; |
815 |
|
816 |
/* p may have been set to a trailing space, so check s exists and that |
817 |
* it isnt \0 */ |
818 |
if (s && (*s != '\0')) |
819 |
{ |
820 |
/* a space? if not (H) could be the last part of info.. */ |
821 |
if ((p = strchr(s, ' '))) |
822 |
*p = '\0'; |
823 |
|
824 |
/* check for (H) which is a hidden server */ |
825 |
if (!strcmp(s, "(H)")) |
826 |
{ |
827 |
SetHidden(client_p); |
828 |
|
829 |
/* if there was no space.. theres nothing to set info to */ |
830 |
if (p) |
831 |
s = ++p; |
832 |
else |
833 |
s = NULL; |
834 |
} |
835 |
else if (p) |
836 |
*p = ' '; |
837 |
|
838 |
/* if there was a trailing space, s could point to \0, so check */ |
839 |
if (s && (*s != '\0')) |
840 |
strlcpy(client_p->info, s, sizeof(client_p->info)); |
841 |
else |
842 |
strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
843 |
} |
844 |
else |
845 |
strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
846 |
} |
847 |
else |
848 |
strlcpy(client_p->info, "(Unknown Location)", sizeof(client_p->info)); |
849 |
} |
850 |
|
851 |
/* bogus_host() |
852 |
* |
853 |
* inputs - hostname |
854 |
* output - 1 if a bogus hostname input, |
855 |
* - 0 if its valid |
856 |
* side effects - none |
857 |
*/ |
858 |
static int |
859 |
bogus_host(char *host) |
860 |
{ |
861 |
unsigned int dots = 0; |
862 |
char *s; |
863 |
|
864 |
for (s = host; *s; s++) |
865 |
{ |
866 |
if (!IsServChar(*s)) |
867 |
return(1); |
868 |
|
869 |
if ('.' == *s) |
870 |
++dots; |
871 |
} |
872 |
|
873 |
return(!dots); |
874 |
} |
875 |
|
876 |
/* server_exists() |
877 |
* |
878 |
* inputs - servername |
879 |
* output - 1 if server exists, 0 if doesnt exist |
880 |
*/ |
881 |
static struct Client * |
882 |
server_exists(char *servername) |
883 |
{ |
884 |
struct Client *target_p; |
885 |
dlink_node *ptr; |
886 |
|
887 |
DLINK_FOREACH(ptr, global_serv_list.head) |
888 |
{ |
889 |
target_p = ptr->data; |
890 |
|
891 |
if (match(target_p->name, servername) || |
892 |
match(servername, target_p->name)) |
893 |
return(target_p); |
894 |
} |
895 |
|
896 |
return(NULL); |
897 |
} |