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solanum-vs-hackint-and-char.../ircd/chmode.c
Doug Freed 4a47689a35 chmode: convert bants to a proper serial 
This way it increments for every change. It need not be a timestamp, as
its actual value is not important.

This fixes an issue where a ban could be set, hit, and cleared all in
the same second, and the affected client would still be cached as banned
because the bants hadn't actually changed.
2023-01-23 04:27:25 -06:00

1594 lines
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/*
* Solanum: a slightly advanced ircd
* chmode.c: channel mode management
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
* Copyright (C) 2005-2006 charybdis development team
*
* 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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "stdinc.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "hook.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h" /* captab */
#include "s_user.h"
#include "send.h"
#include "whowas.h"
#include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
#include "s_newconf.h"
#include "logger.h"
#include "chmode.h"
#include "s_assert.h"
#include "parse.h"
#include "msgbuf.h"
#include "packet.h"
/* bitmasks for error returns, so we send once per call */
#define SM_ERR_NOTS 0x00000001 /* No TS on channel */
#define SM_ERR_NOOPS 0x00000002 /* No chan ops */
#define SM_ERR_UNKNOWN 0x00000004
#define SM_ERR_RPL_C 0x00000008
#define SM_ERR_RPL_B 0x00000010
#define SM_ERR_RPL_E 0x00000020
#define SM_ERR_NOTONCHANNEL 0x00000040 /* Not on channel */
#define SM_ERR_RPL_I 0x00000100
#define SM_ERR_RPL_D 0x00000200
#define SM_ERR_NOPRIVS 0x00000400
#define SM_ERR_RPL_Q 0x00000800
#define SM_ERR_RPL_F 0x00001000
#define SM_ERR_MLOCK 0x00002000
#define MAXMODES_SIMPLE 46 /* a-zA-Z except bqeIov */
static struct ChModeChange mode_changes[BUFSIZE];
static int mode_count;
static int mask_pos;
static int removed_mask_pos;
char cflagsbuf[256];
char cflagsmyinfo[256];
int chmode_flags[256];
extern int h_get_channel_access;
/* OPTIMIZE ME! -- dwr */
void
construct_cflags_strings(void)
{
int i;
char *ptr = cflagsbuf;
char *ptr2 = cflagsmyinfo;
*ptr = '\0';
*ptr2 = '\0';
for(i = 0; i < 256; i++)
{
if (chmode_table[i].set_func != chm_ban &&
chmode_table[i].set_func != chm_forward &&
chmode_table[i].set_func != chm_throttle &&
chmode_table[i].set_func != chm_key &&
chmode_table[i].set_func != chm_limit &&
chmode_table[i].set_func != chm_op &&
chmode_table[i].set_func != chm_voice)
{
chmode_flags[i] = chmode_table[i].mode_type;
}
else
{
chmode_flags[i] = 0;
}
switch (chmode_flags[i])
{
case MODE_FREETARGET:
case MODE_DISFORWARD:
if(ConfigChannel.use_forward)
*ptr++ = (char) i;
break;
default:
if(chmode_flags[i] != 0)
{
*ptr++ = (char) i;
}
}
/* Should we leave orphaned check here? -- dwr */
if (chmode_table[i].set_func != NULL &&
chmode_table[i].set_func != chm_orphaned)
{
*ptr2++ = (char) i;
}
}
*ptr++ = '\0';
*ptr2++ = '\0';
}
/*
* find_umode_slot
*
* inputs - NONE
* outputs - an available cflag bitmask or
* 0 if no cflags are available
* side effects - NONE
*/
static unsigned int
find_cflag_slot(void)
{
unsigned int all_cflags = 0, my_cflag = 0, i;
for (i = 0; i < 256; i++)
all_cflags |= chmode_flags[i];
for (my_cflag = 1; my_cflag && (all_cflags & my_cflag);
my_cflag <<= 1);
return my_cflag;
}
unsigned int
cflag_add(char c_, ChannelModeFunc function)
{
int c = (unsigned char)c_;
if (chmode_table[c].set_func != NULL &&
chmode_table[c].set_func != chm_orphaned)
return 0;
if (chmode_table[c].set_func == NULL)
chmode_table[c].mode_type = find_cflag_slot();
if (chmode_table[c].mode_type == 0)
return 0;
chmode_table[c].set_func = function;
construct_cflags_strings();
return chmode_table[c].mode_type;
}
void
cflag_orphan(char c_)
{
int c = (unsigned char)c_;
s_assert(chmode_flags[c] != 0);
chmode_table[c].set_func = chm_orphaned;
construct_cflags_strings();
}
int
get_channel_access(struct Client *source_p, struct Channel *chptr, struct membership *msptr, int dir, const char *modestr)
{
hook_data_channel_approval moduledata;
if(!MyClient(source_p))
return CHFL_CHANOP;
moduledata.client = source_p;
moduledata.chptr = chptr;
moduledata.msptr = msptr;
moduledata.target = NULL;
moduledata.approved = (msptr != NULL && is_chanop(msptr)) ? CHFL_CHANOP : CHFL_PEON;
moduledata.dir = dir;
moduledata.modestr = modestr;
call_hook(h_get_channel_access, &moduledata);
return moduledata.approved;
}
/* allow_mode_change()
*
* Checks if mlock and chanops permit a mode change.
*
* inputs - client, channel, access level, errors pointer, mode char
* outputs - false on failure, true on success
* side effects - error message sent on failure
*/
static bool
allow_mode_change(struct Client *source_p, struct Channel *chptr, int alevel,
int *errors, char c)
{
/* If this mode char is locked, don't allow local users to change it. */
if (MyClient(source_p) && chptr->mode_lock && strchr(chptr->mode_lock, c))
{
if (!(*errors & SM_ERR_MLOCK))
sendto_one_numeric(source_p,
ERR_MLOCKRESTRICTED,
form_str(ERR_MLOCKRESTRICTED),
chptr->chname,
c,
chptr->mode_lock);
*errors |= SM_ERR_MLOCK;
return false;
}
if(alevel < CHFL_CHANOP)
{
if(!(*errors & SM_ERR_NOOPS))
sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
me.name, source_p->name, chptr->chname);
*errors |= SM_ERR_NOOPS;
return false;
}
return true;
}
/* add_id()
*
* inputs - client, channel, id to add, type, forward
* outputs - NULL on failure, allocated Ban on success
* side effects - given id is added to the appropriate list
*/
struct Ban *
add_id(struct Client *source_p, struct Channel *chptr, const char *banid, const char *forward,
rb_dlink_list * list, long mode_type)
{
struct Ban *actualBan;
static char who[USERHOST_REPLYLEN];
char *realban = LOCAL_COPY(banid);
rb_dlink_node *ptr;
/* dont let local clients overflow the banlist */
if(MyClient(source_p))
{
if((rb_dlink_list_length(&chptr->banlist) + rb_dlink_list_length(&chptr->exceptlist) + rb_dlink_list_length(&chptr->invexlist) + rb_dlink_list_length(&chptr->quietlist)) >= (unsigned long)((chptr->mode.mode & MODE_EXLIMIT) ? ConfigChannel.max_bans_large : ConfigChannel.max_bans))
{
sendto_one(source_p, form_str(ERR_BANLISTFULL),
me.name, source_p->name, chptr->chname, realban);
return NULL;
}
}
/* don't let anyone set duplicate bans */
RB_DLINK_FOREACH(ptr, list->head)
{
actualBan = ptr->data;
if(!irccmp(actualBan->banstr, realban))
return NULL;
}
if(IsPerson(source_p))
sprintf(who, "%s!%s@%s", source_p->name, source_p->username, source_p->host);
else
rb_strlcpy(who, source_p->name, sizeof(who));
actualBan = allocate_ban(realban, who, forward);
actualBan->when = rb_current_time();
rb_dlinkAdd(actualBan, &actualBan->node, list);
/* invalidate the can_send() cache */
if(mode_type == CHFL_BAN || mode_type == CHFL_QUIET || mode_type == CHFL_EXCEPTION)
chptr->bants++;
return actualBan;
}
/* del_id()
*
* inputs - channel, id to remove, type
* outputs - pointer to ban that was removed, if any
* side effects - given id is removed from the appropriate list and returned
*/
struct Ban *
del_id(struct Channel *chptr, const char *banid, rb_dlink_list * list, long mode_type)
{
rb_dlink_node *ptr;
struct Ban *banptr;
if(EmptyString(banid))
return NULL;
RB_DLINK_FOREACH(ptr, list->head)
{
banptr = ptr->data;
if(irccmp(banid, banptr->banstr) == 0)
{
rb_dlinkDelete(&banptr->node, list);
/* invalidate the can_send() cache */
if(mode_type == CHFL_BAN || mode_type == CHFL_QUIET || mode_type == CHFL_EXCEPTION)
chptr->bants++;
return banptr;
}
}
return NULL;
}
/* check_string()
*
* input - string to check
* output - pointer to 'fixed' string, or "*" if empty
* side effects - any white space found becomes \0
*/
static char *
check_string(char *s)
{
char *str = s;
static char splat[] = "*";
if(!(s && *s))
return splat;
for(; *s; ++s)
{
if(IsSpace(*s))
{
*s = '\0';
break;
}
}
return str;
}
/* pretty_mask()
*
* inputs - mask to pretty
* outputs - better version of the mask
* side effects - mask is chopped to limits, and transformed:
* x!y@z => x!y@z
* y@z => *!y@z
* x!y => x!y@*
* x => x!*@*
* z.d => *!*@z.d
*/
static char *
pretty_mask(const char *idmask)
{
static char mask_buf[BUFSIZE];
int old_mask_pos;
const char *nick, *user, *host, *forward = NULL;
char *t, *at, *ex;
int nl, ul, hl, fl;
char *mask;
size_t masklen;
mask = LOCAL_COPY(idmask);
mask = check_string(mask);
collapse(mask);
masklen = strlen(mask);
nick = user = host = "*";
nl = ul = hl = 1;
fl = 0;
if((size_t) BUFSIZE - mask_pos < masklen + 5)
return NULL;
old_mask_pos = mask_pos;
if (*mask == '$')
{
memcpy(mask_buf + mask_pos, mask, masklen + 1);
mask_pos += masklen + 1;
t = mask_buf + old_mask_pos + 1;
if (*t == '!')
*t = '~';
if (*t == '~')
t++;
*t = irctolower(*t);
return mask_buf + old_mask_pos;
}
at = ex = NULL;
if((t = memchr(mask, '@', masklen)) != NULL)
{
at = t;
t++;
if(*t != '\0')
host = t, hl = strlen(t);
if((t = memchr(mask, '!', at - mask)) != NULL)
{
ex = t;
t++;
if(at != t)
user = t, ul = at - t;
if(ex != mask)
nick = mask, nl = ex - mask;
}
else
{
if(at != mask)
user = mask, ul = at - mask;
}
if((t = memchr(host, '!', hl)) != NULL ||
(t = memchr(host, '$', hl)) != NULL)
{
t++;
if (host + hl != t)
forward = t, fl = host + hl - t;
hl = t - 1 - host;
}
}
else if((t = memchr(mask, '!', masklen)) != NULL)
{
ex = t;
t++;
if(ex != mask)
nick = mask, nl = ex - mask;
if(*t != '\0')
user = t, ul = strlen(t);
}
else if(memchr(mask, '.', masklen) != NULL ||
memchr(mask, ':', masklen) != NULL)
{
host = mask, hl = masklen;
}
else
{
if(masklen > 0)
nick = mask, nl = masklen;
}
/* truncate values to max lengths */
if(nl > NICKLEN - 1)
nl = NICKLEN - 1;
if(ul > USERLEN)
ul = USERLEN;
if(hl > HOSTLEN)
hl = HOSTLEN;
if(fl > CHANNELLEN)
fl = CHANNELLEN;
memcpy(mask_buf + mask_pos, nick, nl), mask_pos += nl;
mask_buf[mask_pos++] = '!';
memcpy(mask_buf + mask_pos, user, ul), mask_pos += ul;
mask_buf[mask_pos++] = '@';
memcpy(mask_buf + mask_pos, host, hl), mask_pos += hl;
if (forward) {
mask_buf[mask_pos++] = '$';
memcpy(mask_buf + mask_pos, forward, fl), mask_pos += fl;
}
mask_buf[mask_pos++] = '\0';
return mask_buf + old_mask_pos;
}
/* check_forward()
*
* input - client, channel to set mode on, target channel name
* output - true if forwarding should be allowed
* side effects - numeric sent if not allowed
*/
static bool
check_forward(struct Client *source_p, struct Channel *chptr,
const char *forward)
{
struct Channel *targptr = NULL;
struct membership *msptr;
if(!check_channel_name(forward) ||
(MyClient(source_p) && (strlen(forward) > LOC_CHANNELLEN || hash_find_resv(forward))))
{
sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), forward);
return false;
}
/* don't forward to inconsistent target -- jilles */
if(chptr->chname[0] == '#' && forward[0] == '&')
{
sendto_one_numeric(source_p, ERR_BADCHANNAME,
form_str(ERR_BADCHANNAME), forward);
return false;
}
if(MyClient(source_p) && (targptr = find_channel(forward)) == NULL)
{
sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
form_str(ERR_NOSUCHCHANNEL), forward);
return false;
}
if(MyClient(source_p) && !(targptr->mode.mode & MODE_FREETARGET))
{
if((msptr = find_channel_membership(targptr, source_p)) == NULL ||
get_channel_access(source_p, targptr, msptr, MODE_QUERY, NULL) < CHFL_CHANOP)
{
sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
me.name, source_p->name, targptr->chname);
return false;
}
}
return true;
}
/* fix_key()
*
* input - key to fix
* output - the same key, fixed
* side effects - anything below ascii 13 is discarded, ':' discarded,
* high ascii is dropped to lower half of ascii table
*/
static char *
fix_key(char *arg)
{
unsigned char *s, *t, c;
for(s = t = (unsigned char *) arg; (c = *s); s++)
{
c &= 0x7f;
if(c != ':' && c != ',' && c > ' ')
*t++ = c;
}
*t = '\0';
return arg;
}
/* fix_key_remote()
*
* input - key to fix
* ouput - the same key, fixed
* side effects - high ascii dropped to lower half of table,
* CR/LF/':' are dropped
*/
static char *
fix_key_remote(char *arg)
{
unsigned char *s, *t, c;
for(s = t = (unsigned char *) arg; (c = *s); s++)
{
c &= 0x7f;
if((c != 0x0a) && (c != ':') && (c != ',') && (c != 0x0d) && (c != ' '))
*t++ = c;
}
*t = '\0';
return arg;
}
void
chm_simple(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
if(!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
/* setting + */
if((dir == MODE_ADD) && !(chptr->mode.mode & mode_type))
{
/* if +f is disabled, ignore an attempt to set +QF locally */
if(!ConfigChannel.use_forward && MyClient(source_p) &&
(c == 'Q' || c == 'F'))
return;
chptr->mode.mode |= mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count++].arg = NULL;
}
else if((dir == MODE_DEL) && (chptr->mode.mode & mode_type))
{
chptr->mode.mode &= ~mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_orphaned(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
if(MyClient(source_p))
return;
if((dir == MODE_ADD) && !(chptr->mode.mode & mode_type))
{
chptr->mode.mode |= mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count++].arg = NULL;
}
else if((dir == MODE_DEL) && (chptr->mode.mode & mode_type))
{
chptr->mode.mode &= ~mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_hidden(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
if(MyClient(source_p) && !IsOperGeneral(source_p))
{
if(!(*errors & SM_ERR_NOPRIVS))
sendto_one_numeric(source_p, ERR_NOPRIVILEGES, form_str(ERR_NOPRIVILEGES));
*errors |= SM_ERR_NOPRIVS;
return;
}
if(MyClient(source_p) && !IsOperAdmin(source_p))
{
if(!(*errors & SM_ERR_NOPRIVS))
sendto_one(source_p, form_str(ERR_NOPRIVS), me.name,
source_p->name, "admin");
*errors |= SM_ERR_NOPRIVS;
return;
}
/* setting + */
if((dir == MODE_ADD) && !(chptr->mode.mode & mode_type))
{
chptr->mode.mode |= mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count].mems = ONLY_OPERS;
mode_changes[mode_count++].arg = NULL;
}
else if((dir == MODE_DEL) && (chptr->mode.mode & mode_type))
{
chptr->mode.mode &= ~mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ONLY_OPERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_staff(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
if(MyClient(source_p) && !IsOper(source_p))
{
if(!(*errors & SM_ERR_NOPRIVS))
sendto_one_numeric(source_p, ERR_NOPRIVILEGES, form_str(ERR_NOPRIVILEGES));
*errors |= SM_ERR_NOPRIVS;
return;
}
if(MyClient(source_p) && !HasPrivilege(source_p, "oper:cmodes"))
{
if(!(*errors & SM_ERR_NOPRIVS))
sendto_one(source_p, form_str(ERR_NOPRIVS), me.name,
source_p->name, "cmodes");
*errors |= SM_ERR_NOPRIVS;
return;
}
/* setting + */
if((dir == MODE_ADD) && !(chptr->mode.mode & mode_type))
{
chptr->mode.mode |= mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count++].arg = NULL;
}
else if((dir == MODE_DEL) && (chptr->mode.mode & mode_type))
{
chptr->mode.mode &= ~mode_type;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_ban(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
const char *mask;
char *forward;
rb_dlink_list *list;
rb_dlink_node *ptr;
struct Ban *banptr;
int errorval;
const char *rpl_list_p;
const char *rpl_endlist_p;
int mems;
switch (mode_type)
{
case CHFL_BAN:
list = &chptr->banlist;
errorval = SM_ERR_RPL_B;
rpl_list_p = form_str(RPL_BANLIST);
rpl_endlist_p = form_str(RPL_ENDOFBANLIST);
mems = ALL_MEMBERS;
break;
case CHFL_EXCEPTION:
/* if +e is disabled, allow all but +e locally */
if (!ConfigChannel.use_except && MyClient(source_p) && dir == MODE_ADD)
return;
list = &chptr->exceptlist;
errorval = SM_ERR_RPL_E;
rpl_list_p = form_str(RPL_EXCEPTLIST);
rpl_endlist_p = form_str(RPL_ENDOFEXCEPTLIST);
if(ConfigChannel.use_except || (dir == MODE_DEL))
mems = ONLY_CHANOPS;
else
mems = ONLY_SERVERS;
break;
case CHFL_INVEX:
/* if +I is disabled, allow all but +I locally */
if (!ConfigChannel.use_invex && MyClient(source_p) && dir == MODE_ADD)
return;
list = &chptr->invexlist;
errorval = SM_ERR_RPL_I;
rpl_list_p = form_str(RPL_INVITELIST);
rpl_endlist_p = form_str(RPL_ENDOFINVITELIST);
if(ConfigChannel.use_invex || (dir == MODE_DEL))
mems = ONLY_CHANOPS;
else
mems = ONLY_SERVERS;
break;
case CHFL_QUIET:
list = &chptr->quietlist;
errorval = SM_ERR_RPL_Q;
rpl_list_p = form_str(RPL_QUIETLIST);
rpl_endlist_p = form_str(RPL_ENDOFQUIETLIST);
mems = ALL_MEMBERS;
break;
default:
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "chm_ban() called with unknown type!");
return;
}
if (dir == MODE_QUERY)
{
if((*errors & errorval) != 0)
return;
*errors |= errorval;
/* non-ops cant see +eI lists.. */
/* note that this is still permitted if +e/+I are mlocked. */
if(alevel < CHFL_CHANOP && mode_type != CHFL_BAN &&
mode_type != CHFL_QUIET)
{
if(!(*errors & SM_ERR_NOOPS))
sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
me.name, source_p->name, chptr->chname);
*errors |= SM_ERR_NOOPS;
return;
}
RB_DLINK_FOREACH(ptr, list->head)
{
char buf[BANLEN];
banptr = ptr->data;
if(banptr->forward)
snprintf(buf, sizeof(buf), "%s$%s", banptr->banstr, banptr->forward);
else
rb_strlcpy(buf, banptr->banstr, sizeof(buf));
sendto_one(source_p, rpl_list_p,
me.name, source_p->name, chptr->chname,
buf, banptr->who, banptr->when);
}
sendto_one(source_p, rpl_endlist_p, me.name, source_p->name, chptr->chname);
return;
}
if (!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
/* empty ban, or starts with ':' which messes up s2s, ignore it */
if (EmptyString(arg) || *arg == ':')
return;
if (!MyClient(source_p))
{
if (strchr(arg, ' '))
return;
mask = arg;
}
else
mask = pretty_mask(arg);
/* we'd have problems parsing this, hyb6 does it too
* also make sure it will always fit on a line with channel
* name etc.
*/
if(strlen(mask) > MIN(BANLEN, MODEBUFLEN - 5))
{
sendto_one_numeric(source_p, ERR_INVALIDBAN,
form_str(ERR_INVALIDBAN),
chptr->chname, c, arg);
return;
}
/* Look for a $ after the first character.
* As the first character, it marks an extban; afterwards
* it delimits a forward channel.
*/
if ((forward = strchr(mask+1, '$')) != NULL)
{
*forward++ = '\0';
if (*forward == '\0')
forward = NULL;
}
/* if we're adding a NEW id */
if (dir == MODE_ADD)
{
if (*mask == '$' && MyClient(source_p))
{
if (!valid_extban(mask, source_p, chptr, mode_type))
{
sendto_one_numeric(source_p, ERR_INVALIDBAN,
form_str(ERR_INVALIDBAN),
chptr->chname, c, arg);
return;
}
}
/* For compatibility, only check the forward channel from
* local clients. Accept any forward channel from servers.
*/
if (forward != NULL && MyClient(source_p))
{
/* For simplicity and future flexibility, do not
* allow '$' in forwarding targets.
*/
if (!ConfigChannel.use_forward ||
strchr(forward, '$') != NULL)
{
sendto_one_numeric(source_p, ERR_INVALIDBAN,
form_str(ERR_INVALIDBAN),
chptr->chname, c, arg);
return;
}
/* check_forward() sends its own error message */
if (!check_forward(source_p, chptr, forward))
return;
/* Forwards only make sense for bans. */
if (mode_type != CHFL_BAN)
{
sendto_one_numeric(source_p, ERR_INVALIDBAN,
form_str(ERR_INVALIDBAN),
chptr->chname, c, arg);
return;
}
}
/* dont allow local clients to overflow the banlist, dont
* let remote servers set duplicate bans
*/
if (!add_id(source_p, chptr, mask, forward, list, mode_type))
return;
if (forward)
forward[-1]= '$';
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems = mems;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = mask;
}
else if (dir == MODE_DEL)
{
struct Ban *removed;
static char buf[BANLEN * MAXMODEPARAMS];
int old_removed_mask_pos = removed_mask_pos;
if ((removed = del_id(chptr, mask, list, mode_type)) == NULL)
{
/* mask isn't a valid ban, check arg */
if ((removed = del_id(chptr, arg, list, mode_type)) != NULL)
mask = arg;
}
if (removed && removed->forward)
removed_mask_pos += snprintf(buf + old_removed_mask_pos, sizeof(buf) - old_removed_mask_pos, "%s$%s", removed->banstr, removed->forward) + 1;
else
removed_mask_pos += rb_strlcpy(buf + old_removed_mask_pos, removed ? removed->banstr : mask, sizeof(buf)) + 1;
if (removed)
{
free_ban(removed);
removed = NULL;
}
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = mems;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = buf + old_removed_mask_pos;
}
}
void
chm_op(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
struct membership *mstptr;
struct Client *targ_p;
if(!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
/* empty nick */
if(EmptyString(arg))
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK, form_str(ERR_NOSUCHNICK), "*");
return;
}
if((targ_p = find_chasing(source_p, arg, NULL)) == NULL)
{
return;
}
mstptr = find_channel_membership(chptr, targ_p);
if(mstptr == NULL)
{
if(!(*errors & SM_ERR_NOTONCHANNEL) && MyClient(source_p))
sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
form_str(ERR_USERNOTINCHANNEL), arg, chptr->chname);
*errors |= SM_ERR_NOTONCHANNEL;
return;
}
if(dir == MODE_ADD)
{
if(targ_p == source_p && mstptr->flags & CHFL_CHANOP)
return;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = targ_p->id;
mode_changes[mode_count++].arg = targ_p->name;
mstptr->flags |= CHFL_CHANOP;
}
else
{
if(MyClient(source_p) && IsService(targ_p))
{
sendto_one(source_p, form_str(ERR_ISCHANSERVICE),
me.name, source_p->name, targ_p->name, chptr->chname);
return;
}
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = targ_p->id;
mode_changes[mode_count++].arg = targ_p->name;
mstptr->flags &= ~CHFL_CHANOP;
}
}
void
chm_voice(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
struct membership *mstptr;
struct Client *targ_p;
if(!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
/* empty nick */
if(EmptyString(arg))
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK, form_str(ERR_NOSUCHNICK), "*");
return;
}
if((targ_p = find_chasing(source_p, arg, NULL)) == NULL)
{
return;
}
mstptr = find_channel_membership(chptr, targ_p);
if(mstptr == NULL)
{
if(!(*errors & SM_ERR_NOTONCHANNEL) && MyClient(source_p))
sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
form_str(ERR_USERNOTINCHANNEL), arg, chptr->chname);
*errors |= SM_ERR_NOTONCHANNEL;
return;
}
if(dir == MODE_ADD)
{
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = targ_p->id;
mode_changes[mode_count++].arg = targ_p->name;
mstptr->flags |= CHFL_VOICE;
}
else
{
mode_changes[mode_count].letter = 'v';
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = targ_p->id;
mode_changes[mode_count++].arg = targ_p->name;
mstptr->flags &= ~CHFL_VOICE;
}
}
void
chm_limit(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
static char limitstr[30];
int limit;
if (!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
if (dir == MODE_ADD)
{
if (EmptyString(arg) || (limit = atoi(arg)) <= 0)
return;
sprintf(limitstr, "%d", limit);
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = limitstr;
chptr->mode.limit = limit;
}
else if (dir == MODE_DEL)
{
if(!chptr->mode.limit)
return;
chptr->mode.limit = 0;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_throttle(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
int joins = 0, timeslice = 0;
if (!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
if (dir == MODE_ADD)
{
if (sscanf(arg, "%d:%d", &joins, &timeslice) < 2)
return;
if(joins <= 0 || timeslice <= 0)
return;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = arg;
chptr->mode.join_num = joins;
chptr->mode.join_time = timeslice;
}
else if(dir == MODE_DEL)
{
if(!chptr->mode.join_num)
return;
chptr->mode.join_num = 0;
chptr->mode.join_time = 0;
chptr->join_count = 0;
chptr->join_delta = 0;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_forward(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
/* if +f is disabled, ignore local attempts to set it */
if (!ConfigChannel.use_forward && MyClient(source_p) && dir == MODE_ADD)
return;
if (dir == MODE_QUERY)
{
if (!(*errors & SM_ERR_RPL_F))
{
if (*chptr->mode.forward == '\0')
sendto_one_notice(source_p, ":%s has no forward channel", chptr->chname);
else
sendto_one_notice(source_p, ":%s forward channel is %s", chptr->chname, chptr->mode.forward);
*errors |= SM_ERR_RPL_F;
}
return;
}
#ifndef FORWARD_OPERONLY
if (!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
#else
if (!IsOperGeneral(source_p) && !IsServer(source_p))
{
if(!(*errors & SM_ERR_NOPRIVS))
sendto_one_numeric(source_p, ERR_NOPRIVILEGES, form_str(ERR_NOPRIVILEGES));
*errors |= SM_ERR_NOPRIVS;
return;
}
#endif
if (dir == MODE_ADD)
{
if(EmptyString(arg))
return;
if(!check_forward(source_p, chptr, arg))
return;
rb_strlcpy(chptr->mode.forward, arg, sizeof(chptr->mode.forward));
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems =
ConfigChannel.use_forward ? ALL_MEMBERS : ONLY_SERVERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = arg;
}
else if(dir == MODE_DEL)
{
if(!(*chptr->mode.forward))
return;
*chptr->mode.forward = '\0';
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = NULL;
}
}
void
chm_key(struct Client *source_p, struct Channel *chptr,
int alevel, const char *arg, int *errors, int dir, char c, long mode_type)
{
char *key;
if (!allow_mode_change(source_p, chptr, alevel, errors, c))
return;
if (dir == MODE_ADD)
{
key = LOCAL_COPY(arg);
if(MyClient(source_p))
fix_key(key);
else
fix_key_remote(key);
if(EmptyString(key))
return;
s_assert(key[0] != ' ');
rb_strlcpy(chptr->mode.key, key, sizeof(chptr->mode.key));
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_ADD;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = chptr->mode.key;
}
else if(dir == MODE_DEL)
{
static char splat[] = "*";
int i;
if(!(*chptr->mode.key))
return;
/* hack time. when we get a +k-k mode, the +k arg is
* chptr->mode.key, which the -k sets to \0, so hunt for a
* +k when we get a -k, and set the arg to splat. --anfl
*/
for(i = 0; i < mode_count; i++)
{
if(mode_changes[i].letter == 'k' && mode_changes[i].dir == MODE_ADD)
mode_changes[i].arg = splat;
}
*chptr->mode.key = 0;
mode_changes[mode_count].letter = c;
mode_changes[mode_count].dir = MODE_DEL;
mode_changes[mode_count].mems = ALL_MEMBERS;
mode_changes[mode_count].id = NULL;
mode_changes[mode_count++].arg = "*";
}
}
/* *INDENT-OFF* */
struct ChannelMode chmode_table[256] =
{
['F'] = {chm_simple, MODE_FREETARGET, 0 },
['I'] = {chm_ban, CHFL_INVEX, CHM_QUERYABLE | CHM_OPS_QUERY },
['L'] = {chm_staff, MODE_EXLIMIT, 0 },
['P'] = {chm_staff, MODE_PERMANENT, 0 },
['Q'] = {chm_simple, MODE_DISFORWARD, 0 },
['b'] = {chm_ban, CHFL_BAN, CHM_QUERYABLE },
['e'] = {chm_ban, CHFL_EXCEPTION, CHM_QUERYABLE | CHM_OPS_QUERY },
['f'] = {chm_forward, 0, CHM_ARG_SET | CHM_CAN_QUERY }, /* weird because it's nonstandard and violates isupport */
['g'] = {chm_simple, MODE_FREEINVITE, 0 },
['i'] = {chm_simple, MODE_INVITEONLY, 0 },
['j'] = {chm_throttle, 0, CHM_ARG_SET },
['k'] = {chm_key, 0, CHM_QUERYABLE },
['l'] = {chm_limit, 0, CHM_ARG_SET },
['m'] = {chm_simple, MODE_MODERATED, 0 },
['n'] = {chm_simple, MODE_NOPRIVMSGS, 0 },
['o'] = {chm_op, 0, CHM_ARGS },
['p'] = {chm_simple, MODE_PRIVATE, 0 },
['q'] = {chm_ban, CHFL_QUIET, CHM_QUERYABLE },
['r'] = {chm_simple, MODE_REGONLY, 0 },
['s'] = {chm_simple, MODE_SECRET, 0 },
['t'] = {chm_simple, MODE_TOPICLIMIT, 0 },
['v'] = {chm_voice, 0, CHM_ARGS },
['z'] = {chm_simple, MODE_OPMODERATE, 0 },
};
/* *INDENT-ON* */
/* set_channel_mode()
*
* inputs - client, source, channel, membership pointer, params
* output -
* side effects - channel modes/memberships are changed, MODE is issued
*
* Extensively modified to be hotpluggable, 03/09/06 -- nenolod
*/
void
set_channel_mode(struct Client *client_p, struct Client *source_p,
struct Channel *chptr, struct membership *msptr, int parc, const char *parv[])
{
static char modebuf[BUFSIZE * 2]; /* paranoid case: 2 canonical chars per input char */
static char parabuf[BUFSIZE];
char *mbuf;
char *pbuf;
int cur_len, mlen, paralen, paracount, arglen, len;
int i, j, flags;
int dir = MODE_ADD;
bool changes = false;
bool privileged_query = false;
int parn = 1;
int errors = 0;
int alevel;
const char *ml = parv[0];
char c;
struct Client *fakesource_p;
int flags_list[3] = { ALL_MEMBERS, ONLY_CHANOPS, ONLY_OPERS };
int mode_limit = 0;
int mode_limit_simple = 0;
mask_pos = 0;
removed_mask_pos = 0;
mode_count = 0;
/* Hide connecting server on netburst -- jilles */
if (ConfigServerHide.flatten_links && IsServer(source_p) && !has_id(source_p) && !HasSentEob(source_p))
fakesource_p = &me;
else
fakesource_p = source_p;
struct modeset {
const struct ChannelMode *cm;
const char *arg;
int dir;
char mode;
};
static struct modeset modesets[MAXMODEPARAMS + MAXMODES_SIMPLE];
struct modeset *ms = modesets, *mend;
char canon_op = '\0';
mbuf = modebuf;
for (ml = parv[0]; *ml != 0 && ms - modesets < ARRAY_SIZE(modesets); ml++)
{
c = *ml;
switch (c)
{
case '+':
dir = MODE_ADD;
break;
case '-':
dir = MODE_DEL;
break;
case '=':
dir = MODE_QUERY;
break;
default:
{
int effective_dir = dir;
const struct ChannelMode *cm = &chmode_table[(unsigned char) c];
bool use_arg = dir == MODE_ADD ? cm->flags & CHM_ARG_SET :
dir == MODE_DEL ? cm->flags & CHM_ARG_DEL :
false;
if (cm->set_func == NULL)
{
sendto_one(source_p, form_str(ERR_UNKNOWNMODE), me.name, source_p->name, c);
return;
}
if (use_arg && parn >= parc)
{
if (!(cm->flags & CHM_CAN_QUERY))
{
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), me.name, source_p->name, "MODE");
return;
}
effective_dir = MODE_QUERY;
use_arg = false;
}
if (effective_dir == MODE_QUERY && !(cm->flags & CHM_CAN_QUERY))
{
/* XXX this currently replicates traditional behaviour and just
* does nothing for a query on a mode with no query. would it be
* good to send an error here?
*/
continue;
}
if (MyClient(source_p))
{
if (use_arg && ++mode_limit > MAXMODEPARAMS)
continue;
if (!use_arg && ++mode_limit_simple > MAXMODES_SIMPLE)
continue;
}
char op = effective_dir == MODE_ADD ? '+' :
effective_dir == MODE_DEL ? '-' :
'=';
if (op != canon_op)
*mbuf++ = canon_op = op;
*mbuf++ = c;
if (effective_dir != MODE_QUERY)
changes = true;
if (effective_dir == MODE_QUERY && cm->flags & CHM_OPS_QUERY)
privileged_query = true;
ms->cm = cm;
ms->dir = effective_dir;
if (use_arg)
ms->arg = parv[parn++];
else
ms->arg = NULL;
ms->mode = c;
ms++;
}
}
}
/* this will happen on something like MODE +-=++-.
* we'd have caught that with the if !mode_count
* later on, but this saves an override notice
*/
if (ms == modesets)
return;
if (parn < parc)
{
/* XXX we could reject excess params here */
}
/* Finish the flood grace period if we were asked to do anything */
if (changes && MyClient(source_p) && !IsFloodDone(source_p))
{
flood_endgrace(source_p);
}
mend = ms;
if (parn > 1)
{
strcpy(mbuf, " ");
rb_strlcat(modebuf, reconstruct_parv(parn - 1, parv + 1), sizeof modebuf);
}
else
{
*mbuf = '\0';
}
int access_dir = privileged_query ? MODE_OP_QUERY :
changes ? MODE_ADD :
MODE_QUERY;
alevel = get_channel_access(source_p, chptr, msptr, access_dir, modebuf);
for (ms = modesets; ms < mend; ms++)
{
ChannelModeFunc *set_func = ms->cm->set_func;
set_func(fakesource_p, chptr, alevel, ms->arg, &errors, ms->dir, ms->mode, ms->cm->mode_type);
}
/* bail out if we have nothing to do... */
if (!mode_count)
return;
if (IsServer(source_p))
mlen = sprintf(modebuf, ":%s MODE %s ", fakesource_p->name, chptr->chname);
else
mlen = sprintf(modebuf, ":%s!%s@%s MODE %s ",
source_p->name, source_p->username,
source_p->host, chptr->chname);
for(j = 0; j < 3; j++)
{
int send_flags = flags = flags_list[j];
const char *priv = NULL;
if (flags == ONLY_OPERS)
{
send_flags = ALL_MEMBERS;
priv = "auspex:cmodes";
}
cur_len = mlen;
mbuf = modebuf + mlen;
pbuf = parabuf;
parabuf[0] = '\0';
paracount = paralen = 0;
dir = MODE_QUERY;
for(i = 0; i < mode_count; i++)
{
if(mode_changes[i].letter == 0 || mode_changes[i].mems != flags)
continue;
if(mode_changes[i].arg != NULL)
{
arglen = strlen(mode_changes[i].arg);
if(arglen > MODEBUFLEN - 5)
continue;
}
else
arglen = 0;
/* if we're creeping over MAXMODEPARAMSSERV, or over
* bufsize (4 == +/-,modechar,two spaces) send now.
*/
if(mode_changes[i].arg != NULL &&
((paracount == MAXMODEPARAMSSERV) ||
((cur_len + paralen + arglen + 4) > (BUFSIZE - 3))))
{
*mbuf = '\0';
if(cur_len > mlen)
sendto_channel_local_priv(IsServer(source_p) ? fakesource_p : source_p,
send_flags, priv, chptr, "%s %s", modebuf, parabuf);
else
continue;
paracount = paralen = 0;
cur_len = mlen;
mbuf = modebuf + mlen;
pbuf = parabuf;
parabuf[0] = '\0';
dir = MODE_QUERY;
}
if(dir != mode_changes[i].dir)
{
*mbuf++ = (mode_changes[i].dir == MODE_ADD) ? '+' : '-';
cur_len++;
dir = mode_changes[i].dir;
}
*mbuf++ = mode_changes[i].letter;
cur_len++;
if(mode_changes[i].arg != NULL)
{
paracount++;
len = sprintf(pbuf, "%s ", mode_changes[i].arg);
pbuf += len;
paralen += len;
}
}
if(paralen && parabuf[paralen - 1] == ' ')
parabuf[paralen - 1] = '\0';
*mbuf = '\0';
if(cur_len > mlen)
sendto_channel_local_priv(IsServer(source_p) ? fakesource_p : source_p,
send_flags, priv, chptr, "%s %s", modebuf, parabuf);
}
/* only propagate modes originating locally, or if we're hubbing */
if(MyClient(source_p) || rb_dlink_list_length(&serv_list) > 1)
send_cap_mode_changes(client_p, source_p, chptr, mode_changes, mode_count);
}
/* set_channel_mlock()
*
* inputs - client, source, channel, params
* output -
* side effects - channel mlock is changed / MLOCK is propagated
*/
void
set_channel_mlock(struct Client *client_p, struct Client *source_p,
struct Channel *chptr, const char *newmlock, bool propagate)
{
rb_free(chptr->mode_lock);
chptr->mode_lock = newmlock ? rb_strdup(newmlock) : NULL;
if (propagate)
{
sendto_server(client_p, NULL, CAP_TS6 | CAP_MLOCK, NOCAPS, ":%s MLOCK %ld %s :%s",
source_p->id, (long) chptr->channelts, chptr->chname,
chptr->mode_lock ? chptr->mode_lock : "");
}
}
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