2 * IRC - Internet Relay Chat, ircd/m_create.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
84 * No need to include handlers.h here the signatures must match
85 * and we don't need to force a rebuild of all the handlers everytime
86 * we add a new one to the list. --Bleep
94 #include "ircd_reply.h"
95 #include "ircd_string.h"
107 * ms_create - server message handler
109 int ms_create(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
111 time_t chanTS; /* channel creation time */
112 char *p; /* strtok state */
113 char *name; /* channel name */
114 struct Channel *chptr; /* channel */
115 struct JoinBuf join; /* join and create buffers */
116 struct JoinBuf create;
117 struct ModeBuf mbuf; /* a mode buffer */
118 int badop; /* a flag */
120 if (IsServer(sptr)) {
121 Debug((DEBUG_ERROR, "%s tried to CREATE a channel", sptr->name));
125 /* sanity checks: Only accept CREATE messages from servers */
126 if (parc < 3 || *parv[2] == '\0')
129 chanTS = atoi(parv[2]);
131 joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
132 joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, chanTS);
134 /* A create that didn't appear during a burst has that servers idea of
135 * the current time. Use it for lag calculations.
137 if (!IsBurstOrBurstAck(sptr) && 0 != chanTS &&
138 MAGIC_REMOTE_JOIN_TS != chanTS)
139 sptr->user->server->serv->lag = TStime() - chanTS;
142 /* If this server is >5 minutes fast, squit it */
143 if (TStime() - chanTS<-5*60*60)
144 return exit_client(sptr,sptr,"Timestamp Drift/Bogus TS");
146 /* If we recieve a CREATE for a channel from a server before that server
147 * was linked, then it's a HACK
149 if (MyConnect(sptr) && chanTS<sptr->timestamp+5*60*60)
150 return exit_client(sptr,sptr,"HACK: Bogus TS on CREATE before server link");
153 /* For each channel in the comma seperated list: */
154 for (name = ircd_strtok(&p, parv[1], ","); name;
155 name = ircd_strtok(&p, 0, ",")) {
158 if (IsLocalChannel(name))
161 if ((chptr = FindChannel(name))) {
162 name = chptr->chname;
164 /* Check if we need to bounce a mode */
165 if (TStime() - chanTS > TS_LAG_TIME ||
166 (chptr->creationtime && chanTS > chptr->creationtime &&
167 chptr->creationtime != MAGIC_REMOTE_JOIN_TS)) {
168 modebuf_init(&mbuf, sptr, cptr, chptr,
169 (MODEBUF_DEST_SERVER | /* Send mode to server */
170 MODEBUF_DEST_HACK2 | /* Send a HACK(2) message */
171 MODEBUF_DEST_BOUNCE)); /* And bounce the mode */
173 modebuf_mode_client(&mbuf, MODE_ADD | MODE_CHANOP, sptr);
175 modebuf_flush(&mbuf);
179 } else /* Channel doesn't exist: create it */
180 chptr = get_channel(sptr, name, CGT_CREATE);
182 if (!badop) /* Set/correct TS */
183 chptr->creationtime = chanTS;
185 joinbuf_join(badop ? &join : &create, chptr,
186 (badop || IsModelessChannel(name)) ?
187 CHFL_DEOPPED : CHFL_CHANOP);
190 joinbuf_flush(&join); /* flush out the joins and creates */
191 joinbuf_flush(&create);