unrealircd

- supernets unrealircd source & configuration
git clone git://git.acid.vegas/unrealircd.git
inchannel.c (3991B)
      1 /*
      2  * Extended ban: "in channel?" (+b ~c:#chan)
      3  * (C) Copyright 2003-.. Bram Matthys (Syzop) and the UnrealIRCd team
      4  *
      5  * This program is free software; you can redistribute it and/or modify
      6  * it under the terms of the GNU General Public License as published by
      7  * the Free Software Foundation; either version 1, or (at your option)
      8  * any later version.
      9  *
     10  * This program is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13  * GNU General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU General Public License
     16  * along with this program; if not, write to the Free Software
     17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
     18  */
     19 #include "unrealircd.h"
     20 
     21 ModuleHeader MOD_HEADER
     22 = {
     23 	"extbans/inchannel",
     24 	"4.2",
     25 	"ExtBan ~c - banned when in specified channel",
     26 	"UnrealIRCd Team",
     27 	"unrealircd-6",
     28 };
     29 
     30 /* Forward declarations */
     31 int extban_inchannel_is_ok(BanContext *b);
     32 const char *extban_inchannel_conv_param(BanContext *b, Extban *extban);
     33 int extban_inchannel_is_banned(BanContext *b);
     34 
     35 /** Called upon module init */
     36 MOD_INIT()
     37 {
     38 	ExtbanInfo req;
     39 	
     40 	memset(&req, 0, sizeof(req));
     41 	req.letter = 'c';
     42 	req.name = "channel";
     43 	req.is_ok = extban_inchannel_is_ok;
     44 	req.conv_param = extban_inchannel_conv_param;
     45 	req.is_banned = extban_inchannel_is_banned;
     46 	req.is_banned_events = BANCHK_ALL|BANCHK_TKL;
     47 	req.options = EXTBOPT_INVEX; /* for +I too */
     48 	if (!ExtbanAdd(modinfo->handle, req))
     49 	{
     50 		config_error("could not register extended ban type");
     51 		return MOD_FAILED;
     52 	}
     53 
     54 	MARK_AS_OFFICIAL_MODULE(modinfo);
     55 	
     56 	return MOD_SUCCESS;
     57 }
     58 
     59 /** Called upon module load */
     60 MOD_LOAD()
     61 {
     62 	return MOD_SUCCESS;
     63 }
     64 
     65 /** Called upon unload */
     66 MOD_UNLOAD()
     67 {
     68 	return MOD_SUCCESS;
     69 }
     70 
     71 const char *extban_inchannel_conv_param(BanContext *b, Extban *extban)
     72 {
     73 	static char retbuf[CHANNELLEN+6];
     74 	char *chan, *p, symbol='\0';
     75 
     76 	strlcpy(retbuf, b->banstr, sizeof(retbuf));
     77 	chan = retbuf;
     78 
     79 	if ((*chan == '+') || (*chan == '%') || (*chan == '%') ||
     80 	    (*chan == '@') || (*chan == '&') || (*chan == '~'))
     81 	    chan++;
     82 
     83 	if ((*chan != '#') && (*chan != '*') && (*chan != '?'))
     84 		return NULL;
     85 
     86 	if (!valid_channelname(chan))
     87 		return NULL;
     88 
     89 	p = strchr(chan, ':'); /* ~r:#chan:*.blah.net is not allowed (for now) */
     90 	if (p)
     91 		*p = '\0';
     92 
     93 	/* on a sidenote '#' is allowed because it's a valid channel (atm) */
     94 	return retbuf;
     95 }
     96 
     97 /* The only purpose of this function is a temporary workaround to prevent a desync.. pfff */
     98 int extban_inchannel_is_ok(BanContext *b)
     99 {
    100 	const char *p = b->banstr;
    101 
    102 	if ((b->is_ok_check == EXBCHK_PARAM) && MyUser(b->client) && (b->what == MODE_ADD) && (strlen(b->banstr) > 3))
    103 	{
    104 		if ((*p == '+') || (*p == '%') || (*p == '%') ||
    105 		    (*p == '@') || (*p == '&') || (*p == '~'))
    106 		    p++;
    107 
    108 		if (*p != '#')
    109 		{
    110 			sendnotice(b->client, "Please use a # in the channelname (eg: ~c:#*blah*)");
    111 			return 0;
    112 		}
    113 	}
    114 	return 1;
    115 }
    116 
    117 static int extban_inchannel_compareflags(char symbol, const char *member_modes)
    118 {
    119 	const char *required_modes = NULL;
    120 
    121 	if (symbol == '+')
    122 		required_modes = "vhoaq";
    123 	else if (symbol == '%')
    124 		required_modes = "hoaq";
    125 	else if (symbol == '@')
    126 		required_modes = "oaq";
    127 	else if (symbol == '&')
    128 		required_modes = "aq";
    129 	else if (symbol == '~')
    130 		required_modes = "q";
    131 	else
    132 		return 0; /* unknown prefix character */
    133 
    134 	if (check_channel_access_string(member_modes, required_modes))
    135 		return 1;
    136 
    137 	return 0;
    138 }
    139 
    140 int extban_inchannel_is_banned(BanContext *b)
    141 {
    142 	Membership *lp;
    143 	const char *p = b->banstr;
    144 	char symbol = '\0';
    145 
    146 	if (*p != '#')
    147 	{
    148 		symbol = *p;
    149 		p++;
    150 	}
    151 
    152 	for (lp = b->client->user->channel; lp; lp = lp->next)
    153 	{
    154 		if (match_esc(p, lp->channel->name))
    155 		{
    156 			/* Channel matched, check symbol if needed (+/%/@/etc) */
    157 			if (symbol)
    158 			{
    159 				if (extban_inchannel_compareflags(symbol, lp->member_modes))
    160 					return 1;
    161 			} else
    162 				return 1;
    163 		}
    164 	}
    165 
    166 	return 0;
    167 }
    168