/*
* IRC - Internet Relay Chat, ircd/m_join.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: m_join.c 1336 2005-10-03 07:40:02Z sirvulcan $
*/
/*
* m_functions execute protocol messages on this server:
*
* cptr is always NON-NULL, pointing to a *LOCAL* client
* structure (with an open socket connected!). This
* identifies the physical socket where the message
* originated (or which caused the m_function to be
* executed--some m_functions may call others...).
*
* sptr is the source of the message, defined by the
* prefix part of the message if present. If not
* or prefix not found, then sptr==cptr.
*
* (!IsServer(cptr)) => (cptr == sptr), because
* prefixes are taken *only* from servers...
*
* (IsServer(cptr))
* (sptr == cptr) => the message didn't
* have the prefix.
*
* (sptr != cptr && IsServer(sptr) means
* the prefix specified servername. (?)
*
* (sptr != cptr && !IsServer(sptr) means
* that message originated from a remote
* user (not local).
*
* combining
*
* (!IsServer(sptr)) means that, sptr can safely
* taken as defining the target structure of the
* message in this server.
*
* *Always* true (if 'parse' and others are working correct):
*
* 1) sptr->from == cptr (note: cptr->from == cptr)
*
* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
* *cannot* be a local connection, unless it's
* actually cptr!). [MyConnect(x) should probably
* be defined as (x == x->from) --msa ]
*
* parc number of variable parameter strings (if zero,
* parv is allowed to be NULL)
*
* parv a NULL terminated list of parameter pointers,
*
* parv[0], sender (prefix string), if not present
* this points to an empty string.
* parv[1]...parv[parc-1]
* pointers to additional parameters
* parv[parc] == NULL, *always*
*
* note: it is guaranteed that parv[0]..parv[parc-1] are all
* non-NULL pointers.
*/
#include "config.h"
#include "channel.h"
#include "class.h"
#include "client.h"
#include "gline.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_chattr.h"
#include "ircd_features.h"
#include "ircd_reply.h"
#include "ircd_snprintf.h"
#include "ircd_string.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "s_debug.h"
#include "s_user.h"
#include "send.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
/*
* Helper function to find last 0 in a comma-separated list of
* channel names.
*/
static char *
last0(char *chanlist)
{
char *p;
for (p = chanlist; p[0]; p++) /* find last "JOIN 0" */
if (p[0] == '0' && (p[1] == ',' || p[1] == '\0' || !IsChannelChar(p[1]))) {
chanlist = p; /* we'll start parsing here */
if (!p[1]) /* hit the end */
break;
p++;
} else {
while (p[0] != ',' && p[0] != '\0') /* skip past channel name */
p++;
if (!p[0]) /* hit the end */
break;
}
return chanlist;
}
/*
* Helper function to perform a JOIN 0 if needed; returns 0 if channel
* name is not 0, else removes user from all channels and returns 1.
*/
static int
join0(struct JoinBuf *join, struct Client *cptr, struct Client *sptr,
char *chan)
{
struct Membership *member;
struct JoinBuf part;
/* is it a JOIN 0? */
if (chan[0] != '0' || chan[1] != '\0')
return 0;
joinbuf_join(join, 0, 0); /* join special channel 0 */
/* leave all channels */
joinbuf_init(&part, sptr, cptr, JOINBUF_TYPE_PARTALL,
"Left all channels", 0);
while ((member = cli_user(sptr)->channel))
joinbuf_join(&part, member->channel,
IsZombie(member) ? CHFL_ZOMBIE : 0);
joinbuf_flush(&part);
return 1;
}
/*
* m_join - generic message handler
*/
int m_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Channel *chptr;
struct JoinBuf join;
struct JoinBuf create;
struct Gline *gline;
unsigned int flags = 0;
int i, flex = 0;
char *p = 0;
char *chanlist;
char *name;
char *keys;
char format_reply[BUFSIZE + 1];
if (parc < 2 || *parv[1] == '\0')
return need_more_params(sptr, "JOIN");
joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, TStime());
chanlist = last0(parv[1]); /* find last "JOIN 0" */
keys = parv[2]; /* remember where keys are */
for (name = ircd_strtok(&p, chanlist, ","); name;
name = ircd_strtok(&p, 0, ",")) {
clean_channelname(name);
if (join0(&join, cptr, sptr, name)) /* did client do a JOIN 0? */
continue;
/* bad channel name */
if ((!IsChannelName(name)) || (HasCntrl(name))) {
send_reply(sptr, ERR_NOSUCHCHANNEL, name);
continue;
}
/* BADCHANed channel */
if ((gline = gline_find(name, GLINE_BADCHAN)) &&
GlineIsActive(gline) && !IsAnOper(sptr)) {
send_reply(sptr, ERR_BADCHANNAME, name, gline->gl_reason);
continue;
}
if ((chptr = FindChannel(name))) {
if (find_member_link(chptr, sptr))
continue; /* already on channel */
flags = CHFL_DEOPPED;
}
else
flags = CHFL_CHANOP;
/* disallow creating local channels */
if (IsLocalChannel(name) && !chptr &&
!feature_bool(FEAT_LOCAL_CHANNELS) &&
(feature_bool(FEAT_OPER_LOCAL_CHANNELS) && !IsAnOper(sptr))) {
send_reply(sptr, ERR_NOSUCHCHANNEL, name);
continue;
}
if (cli_user(sptr)->joined >= feature_int(FEAT_MAXCHANNELSPERUSER) &&
!HasPriv(sptr, PRIV_CHAN_LIMIT) && !IsBot(sptr)) {
send_reply(sptr, ERR_TOOMANYCHANNELS, chptr ? chptr->chname : name);
break; /* no point processing the other channels */
}
if (!chptr && feature_bool(FEAT_CREATE_CHAN_OPER_ONLY) && !IsAnOper(sptr)) {
send_reply(sptr, ERR_NOSUCHCHANNEL, name);
continue;
}
if (chptr) {
if (check_target_limit(sptr, chptr, chptr->chname, 0))
continue; /* exceeded target limit */
else if ((i = can_join(sptr, chptr, keys))) {
if (i == -1)
flex = 1;
else if (i > MAGIC_OPER_OVERRIDE) { /* oper overrode mode */
switch (i - MAGIC_OPER_OVERRIDE) {
case ERR_CHANNELISFULL: /* figure out which mode */
i = 'l';
break;
case ERR_INVITEONLYCHAN:
i = 'i';
break;
case ERR_BANNEDFROMCHAN:
i = 'b';
break;
case ERR_BADCHANNELKEY:
i = 'k';
break;
case ERR_NEEDREGGEDNICK:
i = 'r';
break;
case ERR_ADMINONLYCHAN:
i = 'a';
break;
case ERR_OPERONLYCHAN:
i = 'O';
break;
case ERR_SSLONLYCHAN:
i = 'Z';
break;
default:
i = '?';
break;
}
/* send accountability notice */
if (IsGlobalChannel(chptr->chname))
sendwallto_group_butone(&me, WALL_DESYNCH, NULL,
"OPER JOIN: %s JOIN %s (overriding +%c)",
sptr->cli_name, chptr->chname, i);
else
sendto_opmask_butone(0, SNO_HACK4, "OPER JOIN: %C JOIN %H "
"(overriding +%c)", sptr, chptr, i);
} else {
if (i == ERR_OPERONLYCHAN) {
ircd_snprintf(0, format_reply, sizeof(format_reply), "%s", format_message(cli_name(sptr),
cli_username(sptr), (char*)ircd_ntoa((const char*) &(cli_ip(sptr))),
cli_user(sptr)->host, chptr->chname,(char*)feature_str(FEAT_ERR_OPERONLYCHAN)));
send_reply(sptr, i, chptr->chname, format_reply);
} else
send_reply(sptr, i, chptr->chname);
continue;
}
} /* else if ((i = can_join(sptr, chptr, keys))) { */
joinbuf_join(&join, chptr, flags);
} else if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
continue; /* couldn't get channel */
else if (check_target_limit(sptr, chptr, chptr->chname, 1)) {
/* Note: check_target_limit will only ever return 0 here */
sub1_from_channel(chptr); /* created it... */
continue;
} else {
joinbuf_join(&create, chptr, flags);
if (feature_bool(FEAT_AUTOCHANMODES) &&
feature_str(FEAT_AUTOCHANMODES_LIST) &&
strlen(feature_str(FEAT_AUTOCHANMODES_LIST)) > 0)
SetAutoChanModes(chptr);
}
del_invite(sptr, chptr);
if (chptr->topic[0]) {
send_reply(sptr, RPL_TOPIC, chptr->chname, chptr->topic);
send_reply(sptr, RPL_TOPICWHOTIME, chptr->chname, chptr->topic_nick,
chptr->topic_time);
}
do_names(sptr, chptr, NAMES_ALL|NAMES_EON); /* send /names list */
/*
* if (((chptr->mode.mode & MODE_ACCONLY) && !IsAccount(sptr)) ||
* ((chptr->mode.mode & MODE_MODERATED) &&
* (flex == 1) && feature_bool(FEAT_FLEXABLEKEYS))) {
* sendcmdto_one(&me, CMD_MODE, sptr, "%H +v %C", chptr, sptr);
* sendcmdto_serv_butone(&me, CMD_MODE, sptr, "%H +v %C", chptr, sptr);
* sendcmdto_channel_butserv_butone(&me, CMD_MODE, chptr, cptr, 0,
* "%H +v %C", chptr, sptr);
* }
*/
}
joinbuf_flush(&join); /* must be first, if there's a JOIN 0 */
joinbuf_flush(&create);
return 0;
}
/*
* ms_join - server message handler
*/
int ms_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Membership *member;
struct Channel *chptr;
struct JoinBuf join;
unsigned int flags = 0;
time_t creation = 0;
char *p = 0;
char *chanlist;
char *name;
if (IsServer(sptr)) {
return protocol_violation(cptr,
"%s tried to JOIN %s, duh!",
cli_name(sptr),
(parc < 2 || *parv[1] == '\0') ? "a channel":parv[1]
);
}
if (parc < 2 || *parv[1] == '\0')
return need_more_params(sptr, "JOIN");
if (parc > 2 && parv[2])
creation = atoi(parv[2]);
joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
chanlist = last0(parv[1]); /* find last "JOIN 0" */
for (name = ircd_strtok(&p, chanlist, ","); name;
name = ircd_strtok(&p, 0, ",")) {
if (join0(&join, cptr, sptr, name)) /* did client do a JOIN 0? */
continue;
if (IsLocalChannel(name) || !IsChannelName(name)) {
protocol_violation(cptr,"%s tried to join %s",cli_name(sptr),name);
continue;
}
if (!(chptr = FindChannel(name))) {
/* No channel exists, so create one */
if (!(chptr = get_channel(sptr, name, CGT_CREATE))) {
protocol_violation(sptr,"couldn't get channel %s for %s",
name,cli_name(sptr));
continue;
}
flags = CHFL_DEOPPED | (HasFlag(sptr, FLAG_TS8) ? CHFL_SERVOPOK : 0);
/* when the network is 2.10.11+ then remove MAGIC_REMOTE_JOIN_TS */
chptr->creationtime = creation ? creation : MAGIC_REMOTE_JOIN_TS;
}
else { /* We have a valid channel? */
if ((member = find_member_link(chptr, sptr))) {
if (!IsZombie(member)) /* already on channel */
continue;
flags = member->status & (CHFL_DEOPPED | CHFL_SERVOPOK);
remove_user_from_channel(sptr, chptr);
chptr = FindChannel(name);
} else
flags = CHFL_DEOPPED | (HasFlag(sptr, FLAG_TS8) ? CHFL_SERVOPOK : 0);
}
joinbuf_join(&join, chptr, flags);
}
joinbuf_flush(&join); /* flush joins... */
return 0;
}
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