2 * IRC - Internet Relay Chat, ircd/m_burst.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
86 * No need to include handlers.h here the signatures must match
87 * and we don't need to force a rebuild of all the handlers everytime
88 * we add a new one to the list. --Bleep
96 #include "ircd_alloc.h"
97 #include "ircd_reply.h"
98 #include "ircd_string.h"
103 #include "numnicks.h"
115 * ms_burst - server message handler
117 * -- by Run carlo@runaway.xs4all.nl december 1995 till march 1997
119 * parv[0] = sender prefix
120 * parv[1] = channel name
121 * parv[2] = channel timestamp
122 * The meaning of the following parv[]'s depend on their first character:
123 * If parv[n] starts with a '+':
124 * Net burst, additive modes
126 * parv[n+1] = <param> (optional)
127 * parv[n+2] = <param> (optional)
128 * If parv[n] starts with a '%', then n will be parc-1:
129 * parv[n] = %<ban> <ban> <ban> ...
130 * If parv[n] starts with another character:
131 * parv[n] = <nick>[:<mode>],<nick>[:<mode>],...
132 * where <mode> is the channel mode (ov) of nick and all following nicks.
135 * "S BURST #channel 87654321 +ntkl key 123 AAA,AAB:o,BAA,BAB:ov :%ban1 ban2"
137 * Anti net.ride code.
139 * When the channel already exist, and its TS is larger then
140 * the TS in the BURST message, then we cancel all existing modes.
141 * If its is smaller then the received BURST message is ignored.
142 * If it's equal, then the received modes are just added.
144 int ms_burst(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
146 struct ModeBuf modebuf, *mbuf = 0;
147 struct Channel *chptr;
149 struct Membership *member;
150 struct SLink *lp, **lp_p;
151 unsigned int parse_flags = (MODE_PARSE_FORCE | MODE_PARSE_BURST);
152 int param, nickpos = 0, banpos = 0;
153 char modestr[BUFSIZE], nickstr[BUFSIZE], banstr[BUFSIZE];
156 return protocol_violation(sptr,"Too few parameters for BURST");
158 if (!IsBurst(sptr)) /* don't allow BURST outside of burst */
159 return exit_client_msg(cptr, cptr, &me, "HACK: BURST message outside "
160 "net.burst from %s", cli_name(sptr));
162 if (!(chptr = get_channel(sptr, parv[1], CGT_CREATE)))
163 return 0; /* can't create the channel? */
165 timestamp = atoi(parv[2]);
167 /* turn off burst joined flag */
168 for (member = chptr->members; member; member = member->next_member)
169 member->status &= ~CHFL_BURST_JOINED;
171 if (!chptr->creationtime) /* mark channel as created during BURST */
172 chptr->mode.mode |= MODE_BURSTADDED;
174 /* new channel or an older one */
175 if (!chptr->creationtime || chptr->creationtime > timestamp) {
176 chptr->creationtime = timestamp;
178 modebuf_init(mbuf = &modebuf, sptr, cptr, chptr, MODEBUF_DEST_CHANNEL);
179 modebuf_mode(mbuf, MODE_DEL | chptr->mode.mode); /* wipeout modes */
180 chptr->mode.mode &= ~(MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET |
181 MODE_MODERATED | MODE_TOPICLIMIT | MODE_INVITEONLY |
184 parse_flags |= (MODE_PARSE_SET | MODE_PARSE_WIPEOUT); /* wipeout keys */
186 /* mark bans for wipeout */
187 for (lp = chptr->banlist; lp; lp = lp->next)
188 lp->flags |= CHFL_BURST_BAN_WIPEOUT;
189 } else if (chptr->creationtime == timestamp) {
190 modebuf_init(mbuf = &modebuf, sptr, cptr, chptr, MODEBUF_DEST_CHANNEL);
192 parse_flags |= MODE_PARSE_SET; /* set new modes */
195 param = 3; /* parse parameters */
196 while (param < parc) {
197 switch (*parv[param]) {
198 case '+': /* parameter introduces a mode string */
199 param += mode_parse(mbuf, cptr, sptr, chptr, parc - param,
200 parv + param, parse_flags);
203 case '%': /* parameter contains bans */
204 if (parse_flags & MODE_PARSE_SET) {
205 char *banlist = parv[param] + 1, *p = 0, *ban, *ptr;
206 struct SLink *newban;
208 for (ban = ircd_strtok(&p, banlist, " "); ban;
209 ban = ircd_strtok(&p, 0, " ")) {
210 ban = collapse(pretty_mask(ban));
213 * Yeah, we should probably do this elsewhere, and make it better
214 * and more general; this will hold until we get there, though.
215 * I dislike the current add_banid API... -Kev
217 * I wish there were a better algo. for this than the n^2 one
220 for (lp = chptr->banlist; lp; lp = lp->next) {
221 if (!ircd_strcmp(lp->value.ban.banstr, ban)) {
222 ban = 0; /* don't add ban */
223 lp->flags &= ~CHFL_BURST_BAN_WIPEOUT; /* not wiping out */
224 break; /* new ban already existed; don't even repropagate */
225 } else if (!(lp->flags & CHFL_BURST_BAN_WIPEOUT) &&
226 !mmatch(lp->value.ban.banstr, ban)) {
227 ban = 0; /* don't add ban unless wiping out bans */
228 break; /* new ban is encompassed by an existing one; drop */
229 } else if (!mmatch(ban, lp->value.ban.banstr))
230 lp->flags |= CHFL_BAN_OVERLAPPED; /* remove overlapping ban */
236 if (ban) { /* add the new ban to the end of the list */
237 /* Build ban buffer */
239 banstr[banpos++] = ' ';
240 banstr[banpos++] = ':';
241 banstr[banpos++] = '%';
243 banstr[banpos++] = ' ';
244 for (ptr = ban; *ptr; ptr++) /* add ban to buffer */
245 banstr[banpos++] = *ptr;
247 newban = make_link(); /* create new ban */
249 DupString(newban->value.ban.banstr, ban);
250 DupString(newban->value.ban.who, cli_name(sptr));
251 newban->value.ban.when = TStime();
253 newban->flags = CHFL_BAN | CHFL_BURST_BAN; /* set flags */
254 if ((ptr = strrchr(ban, '@')) && check_if_ipmask(ptr + 1))
255 newban->flags |= CHFL_BAN_IPMASK;
259 lp->next = newban; /* link it in */
261 chptr->banlist = newban;
265 param++; /* look at next param */
268 default: /* parameter contains clients */
270 struct Client *acptr;
271 char *nicklist = parv[param], *p = 0, *nick, *ptr;
272 int default_mode = CHFL_DEOPPED | CHFL_BURST_JOINED;
273 int last_mode = CHFL_DEOPPED | CHFL_BURST_JOINED;
275 for (nick = ircd_strtok(&p, nicklist, ","); nick;
276 nick = ircd_strtok(&p, 0, ",")) {
278 if ((ptr = strchr(nick, ':'))) { /* new flags; deal */
281 if (parse_flags & MODE_PARSE_SET) {
282 for (default_mode = CHFL_DEOPPED | CHFL_BURST_JOINED; *ptr;
284 if (*ptr == 'o') /* has oper status */
285 default_mode = (default_mode & ~CHFL_DEOPPED) | CHFL_CHANOP;
286 else if (*ptr == 'v') /* has voice status */
287 default_mode |= CHFL_VOICE;
288 else /* I don't recognize that flag */
289 break; /* so stop processing */
294 if (!(acptr = findNUser(nick)) || cli_from(acptr) != cptr)
295 continue; /* ignore this client */
297 /* Build nick buffer */
298 nickstr[nickpos] = nickpos ? ',' : ' '; /* first char */
301 for (ptr = nick; *ptr; ptr++) /* store nick */
302 nickstr[nickpos++] = *ptr;
304 if (default_mode != last_mode) { /* if mode changed... */
305 last_mode = default_mode;
307 nickstr[nickpos++] = ':'; /* add a specifier */
308 if (default_mode & CHFL_CHANOP)
309 nickstr[nickpos++] = 'o';
310 if (default_mode & CHFL_VOICE)
311 nickstr[nickpos++] = 'v';
314 add_user_to_channel(chptr, acptr, default_mode);
315 sendcmdto_channel_butserv(acptr, CMD_JOIN, chptr, "%H", chptr);
320 } /* switch (*parv[param]) { */
321 } /* while (param < parc) { */
323 nickstr[nickpos] = '\0';
324 banstr[banpos] = '\0';
326 if (parse_flags & MODE_PARSE_SET) {
327 modebuf_extract(mbuf, modestr + 1); /* for sending BURST onward */
328 modestr[0] = modestr[1] ? ' ' : '\0';
332 sendcmdto_serv_butone(sptr, CMD_BURST, cptr, "%H %Tu%s%s%s", chptr,
333 chptr->creationtime, modestr, nickstr, banstr);
335 if (parse_flags & MODE_PARSE_WIPEOUT || banpos)
336 mode_ban_invalidate(chptr);
338 if (parse_flags & MODE_PARSE_SET) { /* any modes changed? */
339 /* first deal with channel members */
340 for (member = chptr->members; member; member = member->next_member) {
341 if (member->status & CHFL_BURST_JOINED) { /* joined during burst */
342 if (member->status & CHFL_CHANOP)
343 modebuf_mode_client(mbuf, MODE_ADD | CHFL_CHANOP, member->user);
344 if (member->status & CHFL_VOICE)
345 modebuf_mode_client(mbuf, MODE_ADD | CHFL_VOICE, member->user);
346 } else if (parse_flags & MODE_PARSE_WIPEOUT) { /* wipeout old ops */
347 if (member->status & CHFL_CHANOP)
348 modebuf_mode_client(mbuf, MODE_DEL | CHFL_CHANOP, member->user);
349 if (member->status & CHFL_VOICE)
350 modebuf_mode_client(mbuf, MODE_DEL | CHFL_VOICE, member->user);
351 member->status = ((member->status & ~(CHFL_CHANOP | CHFL_VOICE)) |
356 /* Now deal with channel bans */
357 lp_p = &chptr->banlist;
361 /* remove ban from channel */
362 if (lp->flags & (CHFL_BAN_OVERLAPPED | CHFL_BURST_BAN_WIPEOUT)) {
363 modebuf_mode_string(mbuf, MODE_DEL | MODE_BAN,
364 lp->value.ban.banstr, 1); /* let it free banstr */
366 *lp_p = lp->next; /* clip out of list */
367 MyFree(lp->value.ban.who); /* free who */
368 free_link(lp); /* free ban */
370 } else if (lp->flags & CHFL_BURST_BAN) /* add ban to channel */
371 modebuf_mode_string(mbuf, MODE_ADD | MODE_BAN,
372 lp->value.ban.banstr, 0); /* don't free banstr */
374 lp->flags &= (CHFL_BAN | CHFL_BAN_IPMASK); /* reset the flag */
375 lp_p = &(*lp_p)->next;
379 return mbuf ? modebuf_flush(mbuf) : 0;