2 * IRC - Internet Relay Chat, ircd/m_connect.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
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 1, or (at your option)
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
27 * m_functions execute protocol messages on this server:
29 * cptr is always NON-NULL, pointing to a *LOCAL* client
30 * structure (with an open socket connected!). This
31 * identifies the physical socket where the message
32 * originated (or which caused the m_function to be
33 * executed--some m_functions may call others...).
35 * sptr is the source of the message, defined by the
36 * prefix part of the message if present. If not
37 * or prefix not found, then sptr==cptr.
39 * (!IsServer(cptr)) => (cptr == sptr), because
40 * prefixes are taken *only* from servers...
43 * (sptr == cptr) => the message didn't
46 * (sptr != cptr && IsServer(sptr) means
47 * the prefix specified servername. (?)
49 * (sptr != cptr && !IsServer(sptr) means
50 * that message originated from a remote
55 * (!IsServer(sptr)) means that, sptr can safely
56 * taken as defining the target structure of the
57 * message in this server.
59 * *Always* true (if 'parse' and others are working correct):
61 * 1) sptr->from == cptr (note: cptr->from == cptr)
63 * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
64 * *cannot* be a local connection, unless it's
65 * actually cptr!). [MyConnect(x) should probably
66 * be defined as (x == x->from) --msa ]
68 * parc number of variable parameter strings (if zero,
69 * parv is allowed to be NULL)
71 * parv a NULL terminated list of parameter pointers,
73 * parv[0], sender (prefix string), if not present
74 * this points to an empty string.
75 * parv[1]...parv[parc-1]
76 * pointers to additional parameters
77 * parv[parc] == NULL, *always*
79 * note: it is guaranteed that parv[0]..parv[parc-1] are all
88 #include "ircd_features.h"
90 #include "ircd_reply.h"
91 #include "ircd_string.h"
106 * ms_connect - server message handler
107 * - Added by Jto 11 Feb 1989
109 * parv[0] = sender prefix
110 * parv[1] = servername
111 * parv[2] = port number
112 * parv[3] = remote server
114 int ms_connect(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
117 unsigned short tmpport;
119 struct ConfItem* aconf;
120 struct Client* acptr;
126 if (!IsPrivileged(sptr))
127 return send_reply(sptr, ERR_NOPRIVILEGES);
131 * this is coming from a server which should have already
132 * checked it's args, if we don't have parc == 4, something
135 protocol_violation(sptr, "Too few parameters to connect");
136 return need_more_params(sptr, "CONNECT");
139 if (hunt_server_cmd(sptr, CMD_CONNECT, cptr, 1, "%s %s :%C", 3, parc, parv)
144 * need to find the conf entry first so we can use the server name from
145 * the conf entry instead of parv[1] to find out if the server is already
146 * present below. --Bleep
148 if (0 == (aconf = conf_find_server(parv[1]))) {
149 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Host %s not listed "
150 "in ircd.conf", sptr, parv[1]);
154 * use aconf->name to look up the server
156 if ((acptr = FindServer(aconf->name))) {
157 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s already "
158 "exists from %s", sptr, parv[1], cli_name(cli_from(acptr)));
162 * Evaluate connection rules... If no rules found, allow the
163 * connect. Otherwise stop with the first true rule (ie: rules
164 * are ored together. Oper connects are effected only by D
165 * lines (CRULEALL) not d lines (CRULEAUTO).
167 if ((rule = conf_eval_crule(aconf->name, CRULE_ALL))) {
168 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Disallowed by rule: %s", sptr, rule);
172 * Check to see if the server is juped; if it is, disallow the connect
174 if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)) {
175 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s is juped: %s",
176 sptr, JupeServer(ajupe), JupeReason(ajupe));
181 * Allow opers to /connect foo.* 0 bah.* to connect foo and bah
182 * using the conf's configured port
184 port = atoi(parv[2]);
188 tmpport = aconf->port;
196 * Notify all operators about remote connect requests
198 sendwallto_group_butone(&me, WALL_WALLOPS, 0,
199 "Remote CONNECT %s %s from %s", parv[1],
200 parv[2] ? parv[2] : "",
201 get_client_name(sptr, HIDE_IP));
202 log_write(LS_NETWORK, L_INFO, 0, "CONNECT From %C : %s %s", sptr, parv[1],
203 parv[2] ? parv[2] : "");
205 if (connect_server(aconf, sptr, 0)) {
206 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connecting to %s.", sptr,
210 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connection to %s failed",
213 aconf->port = tmpport;
218 * mo_connect - oper message handler
219 * - Added by Jto 11 Feb 1989
221 * parv[0] = sender prefix
222 * parv[1] = servername
223 * parv[2] = port number
224 * parv[3] = remote server
226 int mo_connect(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
229 unsigned short tmpport;
231 struct ConfItem* aconf;
232 struct Client* acptr;
236 assert(cptr == sptr);
237 assert(IsAnOper(sptr));
240 return need_more_params(sptr, "CONNECT");
244 * if parc > 3, we are trying to connect two remote
245 * servers to each other
249 * Only allow LocOps to make local CONNECTS --SRB
254 struct Client* acptr2;
255 struct Client* acptr3;
257 if (!(acptr3 = find_match_server(parv[3]))) {
258 send_reply(sptr, ERR_NOSUCHSERVER, parv[3]);
263 * Look for closest matching server
264 * needed for "/connect blah 4400 *"?
266 for (acptr2 = acptr3; acptr2 != &me; acptr2 = cli_serv(acptr2)->up) {
267 if (!match(parv[3], cli_name(acptr2)))
270 parv[3] = cli_name(acptr3);
271 if (hunt_server_cmd(sptr, CMD_CONNECT, cptr, 1, "%s %s :%C", 3, parc,
272 parv) != HUNTED_ISME)
277 * need to find the conf entry first so we can use the server name from
278 * the conf entry instead of parv[1] to find out if the server is already
279 * present below. --Bleep
281 if (0 == (aconf = conf_find_server(parv[1]))) {
282 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Host %s not listed "
283 "in ircd.conf", sptr, parv[1]);
287 * use aconf->name to look up the server, see above
289 if ((acptr = FindServer(aconf->name))) {
290 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s already "
291 "exists from %s", sptr, parv[1], cli_name(cli_from(acptr)));
295 * Evaluate connection rules... If no rules found, allow the
296 * connect. Otherwise stop with the first true rule (ie: rules
297 * are ored together. Oper connects are effected only by D
298 * lines (CRULEALL) not d lines (CRULEAUTO).
300 if ((rule = conf_eval_crule(aconf->name, CRULE_ALL))) {
301 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Disallowed by rule: %s", sptr, rule);
305 * Check to see if the server is juped; if it is, disallow the connect
307 if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)) {
308 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s is juped: %s",
309 sptr, JupeServer(ajupe), JupeReason(ajupe));
313 * Get port number from user, if given. If not specified,
314 * use the default from configuration structure. If missing
315 * from there, then use the precompiled default.
319 assert(0 != parv[2]);
320 if (0 == (port = atoi(parv[2]))) {
321 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Invalid port number",
326 if (0 == port && 0 == (port = feature_int(FEAT_SERVER_PORT))) {
327 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: missing port number",
332 tmpport = aconf->port;
335 if (connect_server(aconf, sptr, 0)) {
336 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connecting to %s.", sptr,
340 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connection to %s failed",
343 aconf->port = tmpport;