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channel.c
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/*
* IRC - Internet Relay Chat, src/channel.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Co Center
*
* 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.
*/
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "numeric.h"
#include "channel.h"
#include "h.h"
#include "userban.h"
#include "memcount.h"
#include "hooks.h"
#include "spamfilter.h"
int server_was_split = YES;
aChannel *channel = NullChn;
#ifdef USER_HOSTMASKING
#define GET_USER_HOST(cptr) IsUmodeH(cptr)?cptr->user->mhost:cptr->user->host
#else
#define GET_USER_HOST(cptr) cptr->user->host
#endif
#ifdef INVITE_LISTS
/* +I list functions */
int add_invite_id(aClient*, aChannel*, char*);
int del_invite_id(aChannel*, char*);
anInvite* is_invited(aClient*, aChannel*);
#endif
#ifdef EXEMPT_LISTS
/* +e list functions */
int add_exempt_id(aClient*, aChannel*, char*);
int del_exempt_id(aChannel*, char*);
#endif
static int add_banid(aClient *, aChannel *, char *);
static int can_join(aClient *, aChannel *, char *);
static void channel_modes(aClient *, char *, char *, aChannel *);
static int del_banid(aChannel *, char *);
static int is_banned(aClient *, aChannel *, chanMember *);
static int set_mode(aClient *, aClient *, aChannel *, int,
int, char **, char *, char *);
static void sub1_from_channel(aChannel *);
int check_channelname(aClient *, unsigned char *);
void clean_channelname(unsigned char *);
static void add_invite(aClient *, aChannel *);
void del_invite(aClient *, aChannel *);
#ifdef ORATIMING
struct timeval tsdnow, tsdthen;
unsigned long tsdms;
#endif
/* number of seconds to add to all readings of time() when making TS's */
static char *PartFmt = ":%s PART %s";
static char *PartFmt2 = ":%s PART %s :%s";
/* server <-> server SJOIN format */
static char *SJOINFmt = ":%s SJOIN %ld %s %s %s :%s";
/* NP means no paramaters, don't send the extra space there */
static char *SJOINFmtNP = ":%s SJOIN %ld %s %s :%s";
/* client SJOIN format, for no channel creation */
static char *CliSJOINFmt = ":%s SJOIN %ld %s";
/* some buffers for rebuilding channel/nick lists with ,'s */
static char nickbuf[BUFSIZE], buf[BUFSIZE];
static char modebuf[REALMODEBUFLEN], parabuf[REALMODEBUFLEN];
/* externally defined function */
extern Link *find_channel_link(Link *, aChannel *); /* defined in list.c */
extern int is_silenced(aClient *sptr, aClient *acptr); /* defined in s_user.c */
extern struct FlagList xflags_list[]; /* for send_topic_burst() */
extern int services_jr; /* for m_join() */
#ifdef ANTI_SPAMBOT
extern int spam_num; /* defined in s_serv.c */
extern int spam_time; /* defined in s_serv.c */
#endif
/* return the length (>=0) of a chain of links. */
static int list_length(Link *lp)
{
int count = 0;
for (; lp; lp = lp->next)
count++;
return count;
}
/* check to see if the message has any control chars in it. */
static int
msg_has_ctrls(char *msg)
{
unsigned char *c;
if (msg == NULL)
return 0;
for (c = (unsigned char *)msg; *c; c++)
{
/* not a control code */
if (*c > 31)
continue;
/* ctcp */
if (*c == 1)
continue;
/* escape */
if (*c == 27)
{
/* ISO 2022 charset shift sequence */
if (c[1] == '$' || c[1] == '(')
{
c++;
continue;
}
}
/* control code */
break;
}
if(*c)
return 1;
return 0;
}
/*
* find_chasing
* Find the client structure for a nick name (user) using history
* mechanism if necessary. If the client is not found, an error message
* (NO SUCH NICK) is generated. If the client was found through the
* history, chasing will be 1 and otherwise 0.
*/
aClient *find_chasing(aClient *sptr, char *user, int *chasing)
{
aClient *who = find_client(user, (aClient *) NULL);
if (chasing)
*chasing = 0;
if (who)
return who;
if (!(who = get_history(user, (long) KILLCHASETIMELIMIT)))
{
sendto_one(sptr, err_str(ERR_NOSUCHNICK),
me.name, sptr->name, user);
return ((aClient *) NULL);
}
if (chasing)
*chasing = 1;
return who;
}
/*
* Fixes a string so that the first white space found becomes an end of
* string marker (`\-`). returns the 'fixed' string or "*" if the
* string was NULL length or a NULL pointer.
*/
static char * check_string(char *s)
{
static char star[2] = "*";
char *str = s;
if (BadPtr(s))
return star;
for (; *s; s++)
if (IsSpace(*s))
{
*s = '\0';
break;
}
return (BadPtr(str)) ? star : str;
}
/*
* create a string of form "foo!bar@fubar" given foo, bar and fubar as
* the parameters. If NULL, they become "*".
*/
static char *make_nick_user_host(char *nick, char *name, char *host)
{
static char namebuf[NICKLEN + USERLEN + HOSTLEN + 6];
int n;
char *ptr1, *ptr2;
ptr1 = namebuf;
for (ptr2 = check_string(nick), n = NICKLEN; *ptr2 && n--;)
*ptr1++ = *ptr2++;
*ptr1++ = '!';
for (ptr2 = check_string(name), n = USERLEN; *ptr2 && n--;)
*ptr1++ = *ptr2++;
*ptr1++ = '@';
for (ptr2 = check_string(host), n = HOSTLEN; *ptr2 && n--;)
*ptr1++ = *ptr2++;
*ptr1 = '\0';
return (namebuf);
}
/* Determine whether a client matches a CIDR banstr. */
static int client_matches_cidrstr(aClient *cptr, char *banstr)
{
char cidrbuf[NICKLEN + USERLEN + HOSTLEN + 6];
char ipbuf[16];
char *s;
int bits;
if (!strchr(banstr, '/'))
return 0;
s = strchr(banstr, '@');
if (s)
s++;
else
return 0;
bits = inet_parse_cidr(cptr->ip_family, s, ipbuf, sizeof(ipbuf));
if (bits > 0 && bitncmp(&cptr->ip, ipbuf, bits) == 0)
{
/* Check the wildcards in the rest of the string. */
snprintf(cidrbuf, sizeof(cidrbuf), "%s!%s@%s",
check_string(cptr->name),
check_string(cptr->user->username),
s);
if (match(banstr, cidrbuf) == 0)
return 1;
}
return 0;
}
#ifdef EXEMPT_LISTS
/* Exempt list functions (+e) */
int add_exempt_id(aClient* cptr, aChannel* chptr, char* exempt_id)
{
aBanExempt* exempt = NULL;
int cnt = 0;
for (exempt = chptr->banexempt_list; exempt; exempt = exempt->next)
{
if (MyClient(cptr))
{
if (++cnt >= MAXEXEMPTLIST)
{
sendto_one(cptr, getreply(ERR_BANLISTFULL), me.name, cptr->name,
chptr->chname, exempt_id, "exempt");
return -1;
}
if (!match(exempt->banstr, exempt_id))
return -1;
}
else if (!mycmp(exempt->banstr, exempt_id))
return -1;
}
exempt = (aBanExempt*)MyMalloc(sizeof(aBanExempt));
exempt->banstr = (char*)MyMalloc(strlen(exempt_id)+1);
strcpy(exempt->banstr, exempt_id);
exempt->when = timeofday;
exempt->next = chptr->banexempt_list;
chptr->banexempt_list = exempt;
chptr->banserial++;
if (IsPerson(cptr))
{
exempt->who = (char *) MyMalloc(strlen(cptr->name) +
strlen(cptr->user->username) +
strlen(GET_USER_HOST(cptr)) + 3);
(void) ircsprintf(exempt->who, "%s!%s@%s",
cptr->name, cptr->user->username, GET_USER_HOST(cptr));
}
else
{
exempt->who = (char *) MyMalloc(strlen(cptr->name) + 1);
(void) strcpy(exempt->who, cptr->name);
}
/* determine type for less matching later */
if(exempt_id[0] == '*' && exempt_id[1] == '!')
{
if(exempt_id[2] == '*' && exempt_id[3] == '@')
exempt->type = MTYP_HOST;
else
exempt->type = MTYP_USERHOST;
}
else
exempt->type = MTYP_FULL;
return 0;
}
int del_exempt_id(aChannel* chptr, char* exempt_id)
{
aBanExempt** exempt;
aBanExempt* tmp;
if (!exempt_id)
return -1;
for (exempt = &chptr->banexempt_list; *exempt; exempt = &((*exempt)->next))
{
if (mycmp(exempt_id, (*exempt)->banstr) == 0)
{
tmp = *exempt;
*exempt = tmp->next;
chptr->banserial++;
MyFree(tmp->banstr);
MyFree(tmp->who);
MyFree(tmp);
break;
}
}
return 0;
}
#endif
#ifdef INVITE_LISTS
/* Invite list functions (+I) */
int add_invite_id(aClient* cptr, aChannel* chptr, char* invite_id)
{
anInvite* invite;
int cnt = 0;
for (invite = chptr->invite_list; invite; invite = invite->next)
{
if (MyClient(cptr))
{
if (++cnt >= chptr->max_invites)
{
sendto_one(cptr, getreply(ERR_BANLISTFULL), me.name, cptr->name,
chptr->chname, invite_id, "invite");
return -1;
}
if (!match(invite->invstr, invite_id))
return -1;
}
else if (!mycmp(invite->invstr, invite_id))
return -1;
}
invite = (anInvite*)MyMalloc(sizeof(anInvite));
invite->invstr = (char*)MyMalloc(strlen(invite_id)+1);
strcpy(invite->invstr, invite_id);
invite->when = timeofday;
invite->next = chptr->invite_list;
chptr->invite_list = invite;
if (IsPerson(cptr))
{
invite->who = (char *) MyMalloc(strlen(cptr->name) +
strlen(cptr->user->username) +
strlen(GET_USER_HOST(cptr)) + 3);
(void) ircsprintf(invite->who, "%s!%s@%s",
cptr->name, cptr->user->username, GET_USER_HOST(cptr));
}
else
{
invite->who = (char *) MyMalloc(strlen(cptr->name) + 1);
(void) strcpy(invite->who, cptr->name);
}
return 0;
}
int del_invite_id(aChannel* chptr, char* invite_id)
{
anInvite** invite;
anInvite* tmp;
if (!invite_id)
return -1;
for (invite = &chptr->invite_list; *invite; invite = &((*invite)->next))
{
if (mycmp(invite_id, (*invite)->invstr) == 0)
{
tmp = *invite;
*invite = tmp->next;
MyFree(tmp->invstr);
MyFree(tmp->who);
MyFree(tmp);
break;
}
}
return 0;
}
anInvite* is_invited(aClient* cptr, aChannel* chptr)
{
char s[NICKLEN + USERLEN + HOSTLEN + 6];
#ifdef USER_HOSTMASKING
char s3[NICKLEN + USERLEN + HOSTLEN + 6];
#endif
char *s2;
anInvite* invite;
strcpy(s, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->host));
#ifdef USER_HOSTMASKING
strcpy(s3, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->mhost));
#endif
s2 = make_nick_user_host(cptr->name, cptr->user->username,
cptr->hostip);
for (invite = chptr->invite_list; invite; invite = invite->next)
{
if (!match(invite->invstr, s) || !match(invite->invstr, s2) ||
#ifdef USER_HOSTMASKING
!match(invite->invstr, s3) ||
#endif
client_matches_cidrstr(cptr, invite->invstr))
break;
}
return invite;
}
#endif
/* Ban functions to work with mode +b */
/* add_banid - add an id to be banned to the channel (belongs to cptr) */
static int add_banid(aClient *cptr, aChannel *chptr, char *banid)
{
aBan *ban;
int cnt = 0;
for (ban = chptr->banlist; ban; ban = ban->next)
{
/* Begin unbreaking redundant ban checking. First step is to allow
* ALL non-duplicates from remote servers. Local clients are still
* subject to the flawed redundancy check for compatibility with
* older servers. This check can be corrected later. -Quension */
if (MyClient(cptr))
{
if (++cnt >= chptr->max_bans)
{
sendto_one(cptr, getreply(ERR_BANLISTFULL), me.name, cptr->name,
chptr->chname, banid, "ban");
return -1;
}
if (!match(ban->banstr, banid))
return -1;
}
else if (!mycmp(ban->banstr, banid))
return -1;
}
ban = (aBan *) MyMalloc(sizeof(aBan));
ban->banstr = (char *) MyMalloc(strlen(banid) + 1);
(void) strcpy(ban->banstr, banid);
ban->next = chptr->banlist;
if (IsPerson(cptr))
{
ban->who = (char *) MyMalloc(strlen(cptr->name) +
strlen(cptr->user->username) +
strlen(GET_USER_HOST(cptr)) + 3);
(void) ircsprintf(ban->who, "%s!%s@%s",
cptr->name, cptr->user->username, GET_USER_HOST(cptr));
}
else
{
ban->who = (char *) MyMalloc(strlen(cptr->name) + 1);
(void) strcpy(ban->who, cptr->name);
}
/* determine what 'type' of mask this is, for less matching later */
if(banid[0] == '*' && banid[1] == '!')
{
if(banid[2] == '*' && banid[3] == '@')
ban->type = MTYP_HOST;
else
ban->type = MTYP_USERHOST;
}
else
ban->type = MTYP_FULL;
ban->when = timeofday;
chptr->banlist = ban;
chptr->banserial++;
return 0;
}
/*
* del_banid - delete an id belonging to cptr if banid is null,
* deleteall banids belonging to cptr.
*/
static int del_banid(aChannel *chptr, char *banid)
{
aBan **ban;
aBan *tmp;
if (!banid)
return -1;
for (ban = &(chptr->banlist); *ban; ban = &((*ban)->next))
if (mycmp(banid, (*ban)->banstr) == 0)
{
tmp = *ban;
*ban = tmp->next;
chptr->banserial++;
MyFree(tmp->banstr);
MyFree(tmp->who);
MyFree(tmp);
break;
}
return 0;
}
/*
* is_banned - returns CHFL_BANNED if banned else 0
*
* caches banned status in chanMember for can_send()
* -Quension [Jun 2004]
*/
static int is_banned(aClient *cptr, aChannel *chptr, chanMember *cm)
{
aBan *ban;
#ifdef EXEMPT_LISTS
aBanExempt *exempt;
#endif
char s[NICKLEN + USERLEN + HOSTLEN + 6];
#ifdef USER_HOSTMASKING
char s3[NICKLEN + USERLEN + HOSTLEN + 6];
#endif
char *s2;
if (!IsPerson(cptr))
return 0;
/* if cache is valid, use it */
if (cm)
{
if (cm->banserial == chptr->banserial)
return (cm->flags & CHFL_BANNED);
cm->banserial = chptr->banserial;
cm->flags &= ~CHFL_BANNED;
}
strcpy(s, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->host));
#ifdef USER_HOSTMASKING
strcpy(s3, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->mhost));
#endif
s2 = make_nick_user_host(cptr->name, cptr->user->username,
cptr->hostip);
#ifdef EXEMPT_LISTS
for (exempt = chptr->banexempt_list; exempt; exempt = exempt->next)
if (!match(exempt->banstr, s) || !match(exempt->banstr, s2) ||
#ifdef USER_HOSTMASKING
!match(exempt->banstr, s3) ||
#endif
client_matches_cidrstr(cptr, exempt->banstr))
return 0;
#endif
for (ban = chptr->banlist; ban; ban = ban->next)
if ((match(ban->banstr, s) == 0) ||
(match(ban->banstr, s2) == 0) ||
#ifdef USER_HOSTMASKING
(match(ban->banstr, s3) == 0) ||
#endif
client_matches_cidrstr(cptr, ban->banstr))
break;
if (ban)
{
if (cm)
cm->flags |= CHFL_BANNED;
return CHFL_BANNED;
}
return 0;
}
/*
* Forces the cached banned status for a user to be flushed in all the channels
* they are in.
*/
void flush_user_banserial(aClient *cptr)
{
Link *ptr;
if (!IsPerson(cptr))
return;
for (ptr = cptr->user->channel; ptr; ptr = ptr->next)
{
aChannel *chptr = ptr->value.chptr;
chanMember *cm = find_user_member(chptr->members, cptr);
if (cm)
cm->banserial = chptr->banserial - 1;
}
}
aBan *nick_is_banned(aChannel *chptr, char *nick, aClient *cptr)
{
aBan *ban;
#ifdef EXEMPT_LISTS
aBanExempt *exempt;
#endif
char *s, s2[NICKLEN+USERLEN+HOSTLEN+6];
#ifdef USER_HOSTMASKING
char s3[NICKLEN+USERLEN+HOSTLEN+6];
#endif
if (!IsPerson(cptr)) return NULL;
strcpy(s2, make_nick_user_host(nick, cptr->user->username,
cptr->user->host));
#ifdef USER_HOSTMASKING
strcpy(s3, make_nick_user_host(nick, cptr->user->username,
cptr->user->mhost));
#endif
s = make_nick_user_host(nick, cptr->user->username, cptr->hostip);
#ifdef EXEMPT_LISTS
for (exempt = chptr->banexempt_list; exempt; exempt = exempt->next)
if (exempt->type == MTYP_FULL &&
((match(exempt->banstr, s2) == 0) ||
#ifdef USER_HOSTMASKING
(match(exempt->banstr, s3) == 0) ||
#endif
(match(exempt->banstr, s) == 0) ||
client_matches_cidrstr(cptr, exempt->banstr)))
return NULL;
#endif
for (ban = chptr->banlist; ban; ban = ban->next)
if (ban->type == MTYP_FULL && /* only check applicable bans */
((match(ban->banstr, s2) == 0) || /* check host before IP */
#ifdef USER_HOSTMASKING
(match(ban->banstr, s3) == 0) ||
#endif
(match(ban->banstr, s) == 0) ||
client_matches_cidrstr(cptr, ban->banstr)))
break;
return (ban);
}
void remove_matching_bans(aChannel *chptr, aClient *cptr, aClient *from)
{
aBan *ban, *bnext;
char targhost[NICKLEN+USERLEN+HOSTLEN+6];
#ifdef USER_HOSTMASKING
char targmhost[NICKLEN+USERLEN+HOSTLEN+6];
#endif
char targip[NICKLEN+USERLEN+HOSTLEN+6];
char *m;
int count = 0, send = 0;
if (!IsPerson(cptr)) return;
strcpy(targhost, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->host));
#ifdef USER_HOSTMASKING
strcpy(targmhost, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->mhost));
#endif
strcpy(targip, make_nick_user_host(cptr->name, cptr->user->username,
cptr->hostip));
m = modebuf;
*m++ = '-';
*m = '\0';
*parabuf = '\0';
ban = chptr->banlist;
while(ban)
{
bnext = ban->next;
if((match(ban->banstr, targhost) == 0) ||
#ifdef USER_HOSTMASKING
(match(ban->banstr, targmhost) == 0) ||
#endif
(match(ban->banstr, targip) == 0) ||
client_matches_cidrstr(cptr, ban->banstr))
{
if (strlen(parabuf) + strlen(ban->banstr) + 10 < (size_t) MODEBUFLEN)
{
if(*parabuf)
strcat(parabuf, " ");
strcat(parabuf, ban->banstr);
count++;
*m++ = 'b';
*m = '\0';
}
else
if(*parabuf)
send = 1;
if(count == MAXTSMODEPARAMS)
send = 1;
if(send)
{
sendto_channel_butserv_me(chptr, from, ":%s MODE %s %s %s",
from->name, chptr->chname, modebuf,
parabuf);
sendto_serv_butone(from, ":%s MODE %s %ld %s %s", from->name,
chptr->chname, chptr->channelts, modebuf,
parabuf);
send = 0;
*parabuf = '\0';
m = modebuf;
*m++ = '-';
if(count != MAXTSMODEPARAMS)
{
strcpy(parabuf, ban->banstr);
*m++ = 'b';
count = 1;
}
else
count = 0;
*m = '\0';
}
del_banid(chptr, ban->banstr);
}
ban = bnext;
}
if(*parabuf)
{
sendto_channel_butserv_me(chptr, from, ":%s MODE %s %s %s", from->name,
chptr->chname, modebuf, parabuf);
sendto_serv_butone(from, ":%s MODE %s %ld %s %s", from->name,
chptr->chname, chptr->channelts, modebuf, parabuf);
}
return;
}
#ifdef EXEMPT_LISTS
void remove_matching_exempts(aChannel *chptr, aClient *cptr, aClient *from)
{
aBanExempt *ex, *enext;
char targhost[NICKLEN+USERLEN+HOSTLEN+6];
#ifdef USER_HOSTMASKING
char targmhost[NICKLEN+USERLEN+HOSTLEN+6];
#endif
char targip[NICKLEN+USERLEN+HOSTLEN+6];
char *m;
int count = 0, send = 0;
if (!IsPerson(cptr)) return;
strcpy(targhost, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->host));
#ifdef USER_HOSTMASKING
strcpy(targmhost, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->mhost));
#endif
strcpy(targip, make_nick_user_host(cptr->name, cptr->user->username,
cptr->hostip));
m = modebuf;
*m++ = '-';
*m = '\0';
*parabuf = '\0';
ex = chptr->banexempt_list;
while(ex)
{
enext = ex->next;
if((match(ex->banstr, targhost) == 0) ||
#ifdef USER_HOSTMASKING
(match(ex->banstr, targmhost) == 0) ||
#endif
(match(ex->banstr, targip) == 0) ||
client_matches_cidrstr(cptr, ex->banstr))
{
if (strlen(parabuf) + strlen(ex->banstr) + 10 < (size_t) MODEBUFLEN)
{
if(*parabuf)
strcat(parabuf, " ");
strcat(parabuf, ex->banstr);
count++;
*m++ = 'e';
*m = '\0';
}
else
if(*parabuf)
send = 1;
if(count == MAXTSMODEPARAMS)
send = 1;
if(send)
{
sendto_channel_butserv_me(chptr, from, ":%s MODE %s %s %s",
from->name, chptr->chname, modebuf,
parabuf);
sendto_serv_butone(from, ":%s MODE %s %ld %s %s", from->name,
chptr->chname, chptr->channelts, modebuf,
parabuf);
send = 0;
*parabuf = '\0';
m = modebuf;
*m++ = '-';
if(count != MAXTSMODEPARAMS)
{
strcpy(parabuf, ex->banstr);
*m++ = 'e';
count = 1;
}
else
count = 0;
*m = '\0';
}
del_exempt_id(chptr, ex->banstr);
}
ex = enext;
}
if(*parabuf)
{
sendto_channel_butserv_me(chptr, from, ":%s MODE %s %s %s", from->name,
chptr->chname, modebuf, parabuf);
sendto_serv_butone(from, ":%s MODE %s %ld %s %s", from->name,
chptr->chname, chptr->channelts, modebuf, parabuf);
}
return;
}
#endif
#ifdef INVITE_LISTS
void remove_matching_invites(aChannel *chptr, aClient *cptr, aClient *from)
{
anInvite *inv, *inext;
char targhost[NICKLEN+USERLEN+HOSTLEN+6];
#ifdef USER_HOSTMASKING
char targmhost[NICKLEN+USERLEN+HOSTLEN+6];
#endif
char targip[NICKLEN+USERLEN+HOSTLEN+6];
char *m;
int count = 0, send = 0;
if (!IsPerson(cptr)) return;
strcpy(targhost, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->host));
#ifdef USER_HOSTMASKING
strcpy(targmhost, make_nick_user_host(cptr->name, cptr->user->username,
cptr->user->mhost));
#endif
strcpy(targip, make_nick_user_host(cptr->name, cptr->user->username,
cptr->hostip));
m = modebuf;
*m++ = '-';
*m = '\0';
*parabuf = '\0';
inv = chptr->invite_list;
while(inv)
{
inext = inv->next;
if((match(inv->invstr, targhost) == 0) ||
#ifdef USER_HOSTMASKING
(match(inv->invstr, targmhost) == 0) ||
#endif
(match(inv->invstr, targip) == 0))
{
if (strlen(parabuf) + strlen(inv->invstr) + 10 < (size_t) MODEBUFLEN)
{
if(*parabuf)
strcat(parabuf, " ");
strcat(parabuf, inv->invstr);
count++;
*m++ = 'I';
*m = '\0';
}
else
if(*parabuf)
send = 1;
if(count == MAXTSMODEPARAMS)
send = 1;
if(send)
{
sendto_channel_butserv_me(chptr, from, ":%s MODE %s %s %s",
from->name, chptr->chname, modebuf,
parabuf);
sendto_serv_butone(from, ":%s MODE %s %ld %s %s", from->name,
chptr->chname, chptr->channelts, modebuf,
parabuf);
send = 0;
*parabuf = '\0';
m = modebuf;
*m++ = '-';
if(count != MAXTSMODEPARAMS)
{
strcpy(parabuf, inv->invstr);
*m++ = 'I';
count = 1;
}
else
count = 0;
*m = '\0';
}
del_invite_id(chptr, inv->invstr);
}
inv = inext;
}
if(*parabuf)
{
sendto_channel_butserv_me(chptr, from, ":%s MODE %s %s %s", from->name,
chptr->chname, modebuf, parabuf);
sendto_serv_butone(from, ":%s MODE %s %ld %s %s", from->name,
chptr->chname, chptr->channelts, modebuf, parabuf);
}
return;
}
#endif
/* refill join rate warning token bucket, and count a join attempt */
static void
jrw_update(aChannel *chptr, int local)
{
int adj_delta;
int bkt_delta;
if (chptr->jrw_bucket < DEFAULT_JOIN_SIZE && NOW > chptr->jrw_last)
{
adj_delta = NOW - chptr->jrw_last;
bkt_delta = DEFAULT_JOIN_SIZE - chptr->jrw_bucket;
/* avoid overflow for long timespans */
if (adj_delta < bkt_delta)
adj_delta *= DEFAULT_JOIN_NUM;
if (adj_delta > bkt_delta)
adj_delta = bkt_delta;
chptr->jrw_bucket += adj_delta;
/* bucket has a free fill (not join) slot, reset debt counter */
if (chptr->jrw_bucket >= DEFAULT_JOIN_NUM)
{
chptr->jrw_debt_ctr = 0;
chptr->jrw_debt_ts = 0;
}
}
if (chptr->jrw_bucket >= -(DEFAULT_JOIN_SIZE - DEFAULT_JOIN_TIME))
chptr->jrw_bucket -= DEFAULT_JOIN_TIME;
/* warning bucket is always current, which pins it at the rate limit */
chptr->jrw_last = NOW;
/* for statistical purposes, keep count of local join attempts */
if (local)
chptr->jrw_debt_ctr++;
/* statistical timestamp reflects all joins */
if (chptr->jrw_debt_ts == 0)