/[svn]/ircd-hybrid-7.2/modules/m_connect.c
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Contents of /ircd-hybrid-7.2/modules/m_connect.c

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Revision 885 - (show annotations)
Wed Oct 31 18:09:24 2007 UTC (11 years, 11 months ago) by michael
File MIME type: text/x-chdr
File size: 8881 byte(s)
- Removed LazyLinks in 7.2 to stop people from asking why we keep
  broken code for half a decade. LL will be implemented in a smarter
  fashion in due time

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * m_connect.c: Connects to a remote IRC server.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include "handlers.h"
27 #include "client.h"
28 #include "ircd.h"
29 #include "irc_string.h"
30 #include "numeric.h"
31 #include "fdlist.h"
32 #include "s_bsd.h"
33 #include "s_conf.h"
34 #include "s_log.h"
35 #include "s_serv.h"
36 #include "send.h"
37 #include "msg.h"
38 #include "parse.h"
39 #include "hash.h"
40 #include "modules.h"
41
42 static void mo_connect(struct Client *, struct Client *, int, char **);
43 static void ms_connect(struct Client *, struct Client *, int, char **);
44
45 struct Message connect_msgtab = {
46 "CONNECT", 0, 0, 2, 0, MFLG_SLOW, 0,
47 {m_unregistered, m_not_oper, ms_connect, m_ignore, mo_connect, m_ignore}
48 };
49
50 #ifndef STATIC_MODULES
51 void
52 _modinit(void)
53 {
54 mod_add_cmd(&connect_msgtab);
55 }
56
57 void
58 _moddeinit(void)
59 {
60 mod_del_cmd(&connect_msgtab);
61 }
62
63 const char *_version = "$Revision$";
64 #endif
65
66 /*
67 * mo_connect - CONNECT command handler
68 *
69 * Added by Jto 11 Feb 1989
70 *
71 * m_connect
72 * parv[0] = sender prefix
73 * parv[1] = servername
74 * parv[2] = port number
75 * parv[3] = remote server
76 */
77 static void
78 mo_connect(struct Client* client_p, struct Client* source_p,
79 int parc, char* parv[])
80 {
81 int port;
82 int tmpport;
83 struct ConfItem *conf = NULL;
84 struct AccessItem *aconf = NULL;
85 struct Client *target_p;
86
87 /* always privileged with handlers */
88 if (MyConnect(source_p) && !IsOperRemote(source_p) && parc > 3)
89 {
90 sendto_one(source_p, form_str(ERR_NOPRIVS),
91 me.name, source_p->name, "connect");
92 return;
93 }
94
95 if (hunt_server(client_p, source_p,
96 ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
97 return;
98
99 if (*parv[1] == '\0')
100 {
101 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
102 me.name, source_p->name, "CONNECT");
103 return;
104 }
105
106 if ((target_p = find_server(parv[1])))
107 {
108 sendto_one(source_p,
109 ":%s NOTICE %s :Connect: Server %s already exists from %s.",
110 me.name, source_p->name, parv[1], target_p->from->name);
111 return;
112 }
113
114 /*
115 * try to find the name, then host, if both fail notify ops and bail
116 */
117 if ((conf = find_matching_name_conf(SERVER_TYPE,
118 parv[1], NULL, NULL, 0)) != NULL)
119 aconf = (struct AccessItem *)map_to_conf(conf);
120 else if ((conf = find_matching_name_conf(SERVER_TYPE,
121 NULL, NULL, parv[1], 0)) != NULL)
122 aconf = (struct AccessItem *)map_to_conf(conf);
123
124 if (conf == NULL)
125 {
126 sendto_one(source_p,
127 ":%s NOTICE %s :Connect: Host %s not listed in ircd.conf",
128 me.name, source_p->name, parv[1]);
129 return;
130 }
131
132 /* Get port number from user, if given. If not specified,
133 * use the default form configuration structure. If missing
134 * from there, then use the precompiled default.
135 */
136 tmpport = port = aconf->port;
137
138 if (parc > 2 && !EmptyString(parv[2]))
139 {
140 if ((port = atoi(parv[2])) <= 0)
141 {
142 sendto_one(source_p, ":%s NOTICE %s :Connect: Illegal port number",
143 me.name, source_p->name);
144 return;
145 }
146 }
147 else if (port <= 0 && (port = PORTNUM) <= 0)
148 {
149 sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
150 me.name, source_p->name);
151 return;
152 }
153
154 if (find_servconn_in_progress(conf->name))
155 {
156 sendto_one(source_p, ":%s NOTICE %s :Connect: a connection to %s "
157 "is already in progress.", me.name, source_p->name, conf->name);
158 return;
159 }
160
161 /*
162 * Notify all operators about remote connect requests
163 */
164 ilog(L_TRACE, "CONNECT From %s : %s %s",
165 source_p->name, parv[1], parv[2] ? parv[2] : "");
166
167 aconf->port = port;
168
169 /* at this point we should be calling connect_server with a valid
170 * C:line and a valid port in the C:line
171 */
172 if (serv_connect(aconf, source_p))
173 {
174 if (!ConfigServerHide.hide_server_ips && IsAdmin(source_p))
175 sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s[%s].%d",
176 me.name, source_p->name, aconf->host,
177 conf->name, aconf->port);
178 else
179 sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
180 me.name, source_p->name, conf->name, aconf->port);
181 }
182 else
183 {
184 sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
185 me.name, source_p->name, conf->name, aconf->port);
186 }
187
188 /* client is either connecting with all the data it needs or has been
189 * destroyed
190 */
191 aconf->port = tmpport;
192 }
193
194 /*
195 * ms_connect - CONNECT command handler
196 *
197 * Added by Jto 11 Feb 1989
198 *
199 * m_connect
200 * parv[0] = sender prefix
201 * parv[1] = servername
202 * parv[2] = port number
203 * parv[3] = remote server
204 */
205 static void
206 ms_connect(struct Client *client_p, struct Client *source_p,
207 int parc, char *parv[])
208 {
209 int port;
210 int tmpport;
211 struct ConfItem *conf = NULL;
212 struct AccessItem *aconf = NULL;
213 struct Client *target_p;
214
215 if (hunt_server(client_p, source_p,
216 ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
217 return;
218
219 if (*parv[1] == '\0')
220 {
221 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
222 me.name, source_p->name, "CONNECT");
223 return;
224 }
225
226 if ((target_p = find_server(parv[1])))
227 {
228 sendto_one(source_p,
229 ":%s NOTICE %s :Connect: Server %s already exists from %s.",
230 me.name, source_p->name, parv[1], target_p->from->name);
231 return;
232 }
233
234 /*
235 * try to find the name, then host, if both fail notify ops and bail
236 */
237 if ((conf = find_matching_name_conf(SERVER_TYPE,
238 parv[1], NULL, NULL, 0)) != NULL)
239 aconf = (struct AccessItem *)map_to_conf(conf);
240 else if ((conf = find_matching_name_conf(SERVER_TYPE,
241 NULL, NULL, parv[1], 0)) != NULL)
242 aconf = (struct AccessItem *)map_to_conf(conf);
243
244 if (aconf == NULL)
245 {
246 sendto_one(source_p,
247 ":%s NOTICE %s :Connect: Host %s not listed in ircd.conf",
248 me.name, source_p->name, parv[1]);
249 return;
250 }
251
252 assert(aconf != NULL);
253
254 /* Get port number from user, if given. If not specified,
255 * use the default form configuration structure. If missing
256 * from there, then use the precompiled default.
257 */
258 tmpport = port = aconf->port;
259
260 if (parc > 2 && !EmptyString(parv[2]))
261 {
262 port = atoi(parv[2]);
263
264 /* if someone sends port 0, and we have a config port.. use it */
265 if (port == 0 && aconf->port)
266 port = aconf->port;
267 else if (port <= 0)
268 {
269 sendto_one(source_p, ":%s NOTICE %s :Connect: Illegal port number",
270 me.name, source_p->name);
271 return;
272 }
273 }
274 else if (port <= 0 && (port = PORTNUM) <= 0)
275 {
276 sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
277 me.name, source_p->name);
278 return;
279 }
280
281 if (find_servconn_in_progress(conf->name))
282 {
283 sendto_one(source_p, ":%s NOTICE %s :Connect: a connection to %s "
284 "is already in progress.", me.name, source_p->name, conf->name);
285 return;
286 }
287
288 /*
289 * Notify all operators about remote connect requests
290 */
291 sendto_wallops_flags(UMODE_WALLOP, &me, "Remote CONNECT %s %d from %s",
292 parv[1], port, source_p->name);
293 sendto_server(NULL, NULL, NOCAPS, NOCAPS,
294 ":%s WALLOPS :Remote CONNECT %s %d from %s",
295 me.name, parv[1], port, source_p->name);
296
297 ilog(L_TRACE, "CONNECT From %s : %s %d",
298 source_p->name, parv[1], port);
299
300 aconf->port = port;
301
302 /*
303 * At this point we should be calling connect_server with a valid
304 * C:line and a valid port in the C:line
305 */
306 if (serv_connect(aconf, source_p))
307 sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
308 me.name, source_p->name, conf->name, aconf->port);
309 else
310 sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
311 me.name, source_p->name, conf->name, aconf->port);
312 /*
313 * Client is either connecting with all the data it needs or has been
314 * destroyed
315 */
316 aconf->port = tmpport;
317 }
318

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