mirror of
https://github.com/unrealircd/unrealircd.git
synced 2026-07-06 11:13:12 +02:00
Bram Matthys
53d23038e5
* There are two security groups by default: known-users and unknown-users. See https://www.unrealircd.org/docs/Security-group_block * New extended ban ~G:securitygroupname, with the typical usage being MODE #chan +b ~G:unknown-users, which will ban all users from the channel that are not identified to services and have a reputation score below 25.
142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
/*
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* Extended ban to ban based on security groups such as "unknown-users"
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* (C) Copyright 2020 Bram Matthys (Syzop) and the UnrealIRCd team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "unrealircd.h"
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ModuleHeader MOD_HEADER
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= {
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"extbans/securitygroup",
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"4.2",
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"ExtBan ~G - Ban based on security-group",
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"UnrealIRCd Team",
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"unrealircd-5",
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};
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/* Forward declarations */
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char *extban_securitygroup_conv_param(char *para);
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int extban_securitygroup_is_ok(Client *client, Channel *channel, char *para, int checkt, int what, int what2);
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int extban_securitygroup_is_banned(Client *client, Channel *channel, char *banin, int type, char **msg, char **errmsg);
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/** Called upon module init */
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MOD_INIT()
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{
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ExtbanInfo req;
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req.flag = 'G';
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req.conv_param = extban_securitygroup_conv_param;
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req.is_ok = extban_securitygroup_is_ok;
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req.is_banned = extban_securitygroup_is_banned;
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req.options = EXTBOPT_INVEX|EXTBOPT_TKL;
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if (!ExtbanAdd(modinfo->handle, req))
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{
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config_error("could not register extended ban type ~G");
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return MOD_FAILED;
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}
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MARK_AS_OFFICIAL_MODULE(modinfo);
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return MOD_SUCCESS;
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}
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/** Called upon module load */
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MOD_LOAD()
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{
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return MOD_SUCCESS;
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}
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/** Called upon unload */
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MOD_UNLOAD()
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{
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return MOD_SUCCESS;
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}
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/* Helper function for extban_securitygroup_is_ok() and extban_securitygroup_conv_param()
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* to do ban validation.
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*/
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int extban_securitygroup_generic(char *para, int strict)
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{
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char *mask;
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mask = para+3;
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/* ! at the start means negative match */
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if (*mask == '!')
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mask++;
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/* Check if the rest of the security group name is valid */
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if (strict)
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{
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if (!security_group_exists(mask))
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return 0; /* security group does not exist */
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} else {
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if (!security_group_valid_name(mask))
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return 0; /* invalid characters or too long */
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}
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if (!*mask)
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return 0; /* don't allow "~G:" nor "~G:!" */
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if (strlen(mask) > SECURITYGROUPLEN + 3)
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mask[SECURITYGROUPLEN + 3] = '\0';
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return 1;
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}
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int extban_securitygroup_is_ok(Client *client, Channel *channel, char *para, int checkt, int what, int what2)
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{
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if (MyUser(client) && (what == MODE_ADD) && (checkt == EXBCHK_PARAM))
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{
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char banbuf[SECURITYGROUPLEN+8];
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strlcpy(banbuf, para, sizeof(banbuf));
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if (!extban_securitygroup_generic(banbuf, 1))
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{
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SecurityGroup *s;
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sendnotice(client, "ERROR: Unknown security-group '%s'. Syntax: +b ~G:securitygroup or +b ~G:!securitygroup", para+3);
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sendnotice(client, "Available security groups:");
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for (s = securitygroups; s; s = s->next)
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sendnotice(client, "%s", s->name);
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sendnotice(client, "unknown-users");
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sendnotice(client, "End of security group list.");
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return 0;
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}
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}
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return 1;
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}
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/** Security group extban - conv_param */
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char *extban_securitygroup_conv_param(char *para)
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{
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static char retbuf[SECURITYGROUPLEN + 8];
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strlcpy(retbuf, para, sizeof(retbuf));
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if (!extban_securitygroup_generic(retbuf, 0))
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return NULL;
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return retbuf;
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}
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/** Is the user banned by ~G:something ? */
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int extban_securitygroup_is_banned(Client *client, Channel *channel, char *banin, int type, char **msg, char **errmsg)
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{
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char *ban = banin+3;
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if (*ban == '!')
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return !user_allowed_by_security_group_name(client, ban+1);
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return user_allowed_by_security_group_name(client, ban);
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}
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