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/* |
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* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
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* |
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* Copyright (c) 1997-2014 ircd-hybrid development 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 2 of the License, or |
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* (at your option) 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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*/ |
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|
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/*! \file m_gline.c |
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* \brief Includes required functions for processing the GLINE/GUNGLINE command. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "list.h" |
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#include "s_gline.h" |
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#include "channel.h" |
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#include "client.h" |
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#include "irc_string.h" |
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#include "ircd.h" |
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#include "conf.h" |
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#include "hostmask.h" |
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#include "numeric.h" |
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#include "s_bsd.h" |
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#include "s_misc.h" |
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#include "send.h" |
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#include "s_serv.h" |
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#include "hash.h" |
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#include "parse.h" |
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#include "modules.h" |
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#include "log.h" |
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#include "conf_db.h" |
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#include "memory.h" |
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|
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#define GLINE_NOT_PLACED 0 |
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#define GLINE_ALREADY_VOTED -1 |
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#define GLINE_PLACED 1 |
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|
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|
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static void |
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check_gline(struct AddressRec *arec) |
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{ |
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dlink_node *ptr = NULL, *ptr_next = NULL; |
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|
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DLINK_FOREACH_SAFE(ptr, ptr_next, local_client_list.head) |
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{ |
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struct Client *client_p = ptr->data; |
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|
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if (IsDead(client_p)) |
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continue; |
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|
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if (match(arec->username, client_p->username)) |
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continue; |
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|
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switch (arec->masktype) |
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{ |
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case HM_IPV4: |
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if (client_p->localClient->aftype == AF_INET) |
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if (match_ipv4(&client_p->localClient->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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conf_try_ban(client_p, arec->conf); |
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break; |
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case HM_IPV6: |
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if (client_p->localClient->aftype == AF_INET6) |
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if (match_ipv6(&client_p->localClient->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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conf_try_ban(client_p, arec->conf); |
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break; |
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default: /* HM_HOST */ |
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if (!match(arec->Mask.hostname, client_p->host)) |
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conf_try_ban(client_p, arec->conf); |
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break; |
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} |
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} |
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} |
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|
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/*! \brief Adds a GLINE to the configuration subsystem. |
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* |
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* \param source_p Operator requesting gline |
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* \param user Username covered by the gline |
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* \param host Hostname covered by the gline |
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* \param reason Reason for the gline |
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*/ |
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static void |
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set_local_gline(const struct Client *source_p, const char *user, |
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const char *host, const char *reason) |
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{ |
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char buffer[IRCD_BUFSIZE]; |
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struct MaskItem *conf = conf_make(CONF_GLINE); |
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|
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snprintf(buffer, sizeof(buffer), "%s (%s)", reason, smalldate(CurrentTime)); |
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conf->reason = xstrdup(buffer); |
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conf->user = xstrdup(user); |
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conf->host = xstrdup(host); |
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|
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conf->setat = CurrentTime; |
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conf->until = CurrentTime + ConfigFileEntry.gline_time; |
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SetConfDatabase(conf); |
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|
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sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
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"%s added G-Line for [%s@%s] [%s]", |
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get_oper_name(source_p), |
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conf->user, conf->host, conf->reason); |
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ilog(LOG_TYPE_GLINE, "%s added G-Line for [%s@%s] [%s]", |
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get_oper_name(source_p), conf->user, conf->host, conf->reason); |
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|
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check_gline(add_conf_by_address(CONF_GLINE, conf)); |
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} |
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|
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/*! \brief Removes a GLINE from the configuration subsystem. |
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* |
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* \param user Username covered by the gline |
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* \param host Hostname covered by the gline |
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*/ |
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static int |
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remove_gline_match(const char *user, const char *host) |
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{ |
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struct irc_ssaddr iphost, *piphost; |
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struct MaskItem *conf; |
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int t = 0; |
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int aftype = 0; |
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|
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if ((t = parse_netmask(host, &iphost, NULL)) != HM_HOST) |
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{ |
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#ifdef IPV6 |
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if (t == HM_IPV6) |
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aftype = AF_INET6; |
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else |
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#endif |
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aftype = AF_INET; |
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piphost = &iphost; |
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} |
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else |
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piphost = NULL; |
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|
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if ((conf = find_conf_by_address(host, piphost, CONF_GLINE, aftype, user, NULL, 0))) |
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{ |
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if (IsConfDatabase(conf)) |
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{ |
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delete_one_address_conf(host, conf); |
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return 1; |
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} |
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} |
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|
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return 0; |
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} |
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|
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/*! \brief This function is called once a majority of opers have agreed on a |
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* GLINE/GUNGLINE, and it can be placed. The information about an |
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* operator being passed to us happens to be the operator who pushed us |
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* over the "majority" level needed. See check_majority() for more |
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* information. |
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* |
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* \param source_p Operator requesting gline |
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* \param user Username covered by the gline |
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* \param host Hostname covered by the gline |
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* \param reason Reason for the gline |
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* \param type Valid values are either GLINE_PENDING_ADD_TYPE, or |
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* GLINE_PENDING_DEL_TYPE |
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*/ |
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static void |
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add_new_majority(const struct Client *source_p, const char *user, |
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const char *host, const char *reason, const unsigned int type) |
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{ |
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struct gline_pending *pending = MyMalloc(sizeof(struct gline_pending)); |
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|
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strlcpy(pending->vote_1.oper_nick, source_p->name, sizeof(pending->vote_1.oper_nick)); |
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strlcpy(pending->vote_1.oper_user, source_p->username, sizeof(pending->vote_1.oper_user)); |
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strlcpy(pending->vote_1.oper_host, source_p->host, sizeof(pending->vote_1.oper_host)); |
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strlcpy(pending->vote_1.oper_server, source_p->servptr->name, sizeof(pending->vote_1.oper_server)); |
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|
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strlcpy(pending->user, user, sizeof(pending->user)); |
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strlcpy(pending->host, host, sizeof(pending->host)); |
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strlcpy(pending->vote_1.reason, reason, sizeof(pending->vote_1.reason)); |
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|
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pending->last_gline_time = CurrentTime; |
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pending->vote_1.time_request = CurrentTime; |
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|
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dlinkAdd(pending, &pending->node, &pending_glines[type]); |
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} |
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|
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/*! \brief See if there is a majority agreement on a GLINE on the given user. |
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* There must be at least 3 different opers agreeing on this |
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* GLINE/GUNGLINE |
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* |
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* \param source_p Operator requesting gline |
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* \param user Username covered by the gline |
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* \param host Hostname covered by the gline |
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* \param reason Reason for the gline |
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* \param type Valid values are either GLINE_PENDING_ADD_TYPE, or |
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* GLINE_PENDING_DEL_TYPE |
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* |
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* \return |
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* - GLINE_ALREADY_VOTED returned if oper/server has already voted |
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* - GLINE_PLACED returned if this triggers a gline |
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* - GLINE_NOT_PLACED returned if not triggered |
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*/ |
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static int |
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check_majority(const struct Client *source_p, const char *user, |
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const char *host, const char *reason, const int type) |
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{ |
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dlink_node *dn_ptr = NULL; |
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|
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cleanup_glines(NULL); |
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|
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/* if its already glined, why bother? :) -- fl_ */ |
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if ((type == GLINE_PENDING_ADD_TYPE) && find_is_glined(host, user)) |
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return GLINE_NOT_PLACED; |
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|
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DLINK_FOREACH(dn_ptr, pending_glines[type].head) |
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{ |
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struct gline_pending *gp_ptr = dn_ptr->data; |
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|
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if (irccmp(gp_ptr->user, user) || |
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irccmp(gp_ptr->host, host)) |
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continue; |
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|
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if ((!irccmp(gp_ptr->vote_1.oper_user, source_p->username) && |
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!irccmp(gp_ptr->vote_1.oper_host, source_p->host)) || |
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!irccmp(gp_ptr->vote_1.oper_server, source_p->servptr->name)) |
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return GLINE_ALREADY_VOTED; |
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|
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if (gp_ptr->vote_2.oper_user[0] != '\0') |
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{ |
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/* if two other opers on two different servers have voted yes */ |
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if ((!irccmp(gp_ptr->vote_2.oper_user, source_p->username) && |
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!irccmp(gp_ptr->vote_2.oper_host, source_p->host)) || |
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!irccmp(gp_ptr->vote_2.oper_server, source_p->servptr->name)) |
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return GLINE_ALREADY_VOTED; |
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|
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if (type == GLINE_PENDING_DEL_TYPE) |
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{ |
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if (remove_gline_match(user, host)) |
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{ |
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sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
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"%s has removed the G-Line for: [%s@%s]", |
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get_oper_name(source_p), user, host); |
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ilog(LOG_TYPE_GLINE, "%s removed G-Line for [%s@%s]", |
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get_oper_name(source_p), user, host); |
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} |
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} |
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else |
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/* trigger the gline using the original reason --fl */ |
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set_local_gline(source_p, user, host, gp_ptr->vote_1.reason); |
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|
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cleanup_glines(gp_ptr); |
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return GLINE_PLACED; |
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} |
260 |
|
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strlcpy(gp_ptr->vote_2.oper_nick, source_p->name, |
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sizeof(gp_ptr->vote_2.oper_nick)); |
263 |
strlcpy(gp_ptr->vote_2.oper_user, source_p->username, |
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sizeof(gp_ptr->vote_2.oper_user)); |
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strlcpy(gp_ptr->vote_2.oper_host, source_p->host, |
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sizeof(gp_ptr->vote_2.oper_host)); |
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strlcpy(gp_ptr->vote_2.reason, reason, |
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sizeof(gp_ptr->vote_2.reason)); |
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strlcpy(gp_ptr->vote_2.oper_server, source_p->servptr->name, |
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sizeof(gp_ptr->vote_2.oper_server)); |
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gp_ptr->last_gline_time = CurrentTime; |
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gp_ptr->vote_2.time_request = CurrentTime; |
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return GLINE_NOT_PLACED; |
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} |
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|
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/* |
277 |
* Didn't find this user@host gline in pending gline list |
278 |
* so add it. |
279 |
*/ |
280 |
add_new_majority(source_p, user, host, reason, type); |
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return GLINE_NOT_PLACED; |
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} |
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|
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/* ms_gline() |
285 |
* |
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* inputs - The usual for a m_ function |
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* output - |
288 |
* side effects - |
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* |
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* Place a G line if 3 opers agree on the identical user@host |
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* |
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* Allow this server to pass along GLINE if received and |
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* GLINES is not defined. |
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* |
295 |
*/ |
296 |
static int |
297 |
ms_gline(struct Client *client_p, struct Client *source_p, |
298 |
int parc, char *parv[]) |
299 |
{ |
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const char *reason = NULL; /* reason for "victims" demise */ |
301 |
const char *user = NULL; |
302 |
const char *host = NULL; /* user and host of GLINE "victim" */ |
303 |
const char *p = NULL; |
304 |
|
305 |
if (!IsClient(source_p)) |
306 |
return 0; |
307 |
|
308 |
if (parc != 4 || EmptyString(parv[3])) |
309 |
return 0; |
310 |
|
311 |
assert(source_p->servptr != NULL); |
312 |
|
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user = parv[1]; |
314 |
host = parv[2]; |
315 |
reason = parv[3]; |
316 |
|
317 |
sendto_server(source_p->from, CAP_GLN|CAP_TS6, NOCAPS, |
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":%s GLINE %s %s :%s", |
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ID(source_p), user, host, reason); |
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sendto_server(source_p->from, CAP_GLN, CAP_TS6, |
321 |
":%s GLINE %s %s :%s", |
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source_p->name, user, host, reason); |
323 |
|
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if (!ConfigFileEntry.glines) |
325 |
return 0; |
326 |
|
327 |
if (!valid_wild_card(source_p, 1, 2, user, host)) |
328 |
return 0; |
329 |
|
330 |
if ((p = strchr(host, '/'))) |
331 |
{ |
332 |
int bitlen = strtol(++p, NULL, 10); |
333 |
int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 : |
334 |
ConfigFileEntry.gline_min_cidr; |
335 |
|
336 |
if (bitlen < min_bitlen) |
337 |
{ |
338 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
339 |
"%s is requesting a GLINE with a CIDR mask < %d for [%s@%s] [%s]", |
340 |
get_oper_name(source_p), min_bitlen, |
341 |
user, host, reason); |
342 |
return 0; |
343 |
} |
344 |
} |
345 |
|
346 |
/* If at least 3 opers agree this user should be G lined then do it */ |
347 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) == |
348 |
GLINE_ALREADY_VOTED) |
349 |
{ |
350 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
351 |
"oper or server has already voted"); |
352 |
return 0; |
353 |
} |
354 |
|
355 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
356 |
"%s requesting G-Line for [%s@%s] [%s]", |
357 |
get_oper_name(source_p), |
358 |
user, host, reason); |
359 |
ilog(LOG_TYPE_GLINE, "G-Line for [%s@%s] [%s] requested by %s", |
360 |
user, host, reason, get_oper_name(source_p)); |
361 |
return 0; |
362 |
} |
363 |
|
364 |
/*! \brief GLINE command handler (called by operators) |
365 |
* |
366 |
* \param client_p Pointer to allocated Client struct with physical connection |
367 |
* to this server, i.e. with an open socket connected. |
368 |
* \param source_p Pointer to allocated Client struct from which the message |
369 |
* originally comes from. This can be a local or remote client. |
370 |
* \param parc Integer holding the number of supplied arguments. |
371 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
372 |
* pointers. |
373 |
* \note Valid arguments for this command are: |
374 |
* - parv[0] = sender prefix |
375 |
* - parv[1] = user\@host mask |
376 |
* - parv[2] = reason |
377 |
*/ |
378 |
static int |
379 |
mo_gline(struct Client *client_p, struct Client *source_p, |
380 |
int parc, char *parv[]) |
381 |
{ |
382 |
char *user = NULL; |
383 |
char *host = NULL; |
384 |
char *reason = NULL; |
385 |
char *p; |
386 |
|
387 |
if (!HasOFlag(source_p, OPER_FLAG_GLINE)) |
388 |
{ |
389 |
sendto_one(source_p, form_str(ERR_NOPRIVS), |
390 |
me.name, source_p->name, "gline"); |
391 |
return 0; |
392 |
} |
393 |
|
394 |
if (!ConfigFileEntry.glines) |
395 |
{ |
396 |
sendto_one(source_p, ":%s NOTICE %s :GLINE disabled", |
397 |
me.name, source_p->name); |
398 |
return 0; |
399 |
} |
400 |
|
401 |
if (parse_aline("GLINE", source_p, parc, parv, AWILD, |
402 |
&user, &host, NULL, NULL, &reason) < 0) |
403 |
return 0; |
404 |
|
405 |
if ((p = strchr(host, '/')) != NULL) |
406 |
{ |
407 |
int bitlen = strtol(++p, NULL, 10); |
408 |
int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 : |
409 |
ConfigFileEntry.gline_min_cidr; |
410 |
if (bitlen < min_bitlen) |
411 |
{ |
412 |
sendto_one(source_p, ":%s NOTICE %s :Cannot set G-Lines with CIDR length < %d", |
413 |
me.name, source_p->name, min_bitlen); |
414 |
return 0; |
415 |
} |
416 |
} |
417 |
|
418 |
/* If at least 3 opers agree this user should be G lined then do it */ |
419 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) == |
420 |
GLINE_ALREADY_VOTED) |
421 |
{ |
422 |
sendto_one(source_p, |
423 |
":%s NOTICE %s :This server or oper has already voted", |
424 |
me.name, source_p->name); |
425 |
return 0; |
426 |
} |
427 |
|
428 |
/* |
429 |
* call these two functions first so the 'requesting' notice always comes |
430 |
* before the 'has triggered' notice. -bill |
431 |
*/ |
432 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
433 |
"%s requesting G-Line for [%s@%s] [%s]", |
434 |
get_oper_name(source_p), |
435 |
user, host, reason); |
436 |
ilog(LOG_TYPE_GLINE, "G-Line for [%s@%s] [%s] requested by %s", |
437 |
user, host, reason, get_oper_name(source_p)); |
438 |
|
439 |
/* 4 param version for hyb-7 servers */ |
440 |
sendto_server(NULL, CAP_GLN|CAP_TS6, NOCAPS, |
441 |
":%s GLINE %s %s :%s", |
442 |
ID(source_p), user, host, reason); |
443 |
sendto_server(NULL, CAP_GLN, CAP_TS6, |
444 |
":%s GLINE %s %s :%s", |
445 |
source_p->name, user, host, reason); |
446 |
return 0; |
447 |
} |
448 |
|
449 |
static void |
450 |
do_sungline(struct Client *source_p, const char *user, |
451 |
const char *host, const char *reason, int prop) |
452 |
{ |
453 |
assert(source_p->servptr != NULL); |
454 |
|
455 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
456 |
"%s requesting UNG-Line for [%s@%s] [%s]", |
457 |
get_oper_name(source_p), user, host, reason); |
458 |
ilog(LOG_TYPE_GLINE, "UNG-Line for [%s@%s] [%s] requested by %s", |
459 |
user, host, reason, get_oper_name(source_p)); |
460 |
|
461 |
/* If at least 3 opers agree this user should be un G lined then do it */ |
462 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_DEL_TYPE) == |
463 |
GLINE_ALREADY_VOTED) |
464 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
465 |
"oper or server has already voted"); |
466 |
|
467 |
if (prop) |
468 |
{ |
469 |
sendto_server(source_p->from, CAP_ENCAP|CAP_TS6, NOCAPS, |
470 |
":%s ENCAP * GUNGLINE %s %s :%s", |
471 |
ID(source_p), user, host, reason); |
472 |
sendto_server(source_p->from, CAP_ENCAP, CAP_TS6, |
473 |
":%s ENCAP * GUNGLINE %s %s :%s", |
474 |
source_p->name, user, host, reason); |
475 |
} |
476 |
} |
477 |
|
478 |
/*! \brief GUNGLINE command handler (called in response to an encapsulated |
479 |
* GUNGLINE command) |
480 |
* |
481 |
* \param client_p Pointer to allocated Client struct with physical connection |
482 |
* to this server, i.e. with an open socket connected. |
483 |
* \param source_p Pointer to allocated Client struct from which the message |
484 |
* originally comes from. This can be a local or remote client. |
485 |
* \param parc Integer holding the number of supplied arguments. |
486 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
487 |
* pointers. |
488 |
* \note Valid arguments for this command are: |
489 |
* - parv[0] = sender prefix |
490 |
* - parv[1] = username |
491 |
* - parv[2] = hostname |
492 |
* - parv[3] = reason |
493 |
*/ |
494 |
static int |
495 |
me_gungline(struct Client *client_p, struct Client *source_p, |
496 |
int parc, char *parv[]) |
497 |
{ |
498 |
if (ConfigFileEntry.glines) |
499 |
do_sungline(source_p, parv[1], parv[2], parv[3], 0); |
500 |
return 0; |
501 |
} |
502 |
|
503 |
/*! \brief GUNGLINE command handler (called by operators) |
504 |
* |
505 |
* \param client_p Pointer to allocated Client struct with physical connection |
506 |
* to this server, i.e. with an open socket connected. |
507 |
* \param source_p Pointer to allocated Client struct from which the message |
508 |
* originally comes from. This can be a local or remote client. |
509 |
* \param parc Integer holding the number of supplied arguments. |
510 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
511 |
* pointers. |
512 |
* \note Valid arguments for this command are: |
513 |
* - parv[0] = sender prefix |
514 |
* - parv[1] = user\@host mask |
515 |
* - parv[2] = reason |
516 |
*/ |
517 |
static int |
518 |
mo_gungline(struct Client *client_p, struct Client *source_p, |
519 |
int parc, char *parv[]) |
520 |
{ |
521 |
char *user = NULL; |
522 |
char *host = NULL; |
523 |
char *reason = NULL; |
524 |
|
525 |
if (!HasOFlag(source_p, OPER_FLAG_GLINE)) |
526 |
{ |
527 |
sendto_one(source_p, form_str(ERR_NOPRIVS), |
528 |
me.name, source_p->name, "gline"); |
529 |
return 0; |
530 |
} |
531 |
|
532 |
if (!ConfigFileEntry.glines) |
533 |
{ |
534 |
sendto_one(source_p, ":%s NOTICE %s :GUNGLINE disabled", |
535 |
me.name, source_p->name); |
536 |
return 0; |
537 |
} |
538 |
|
539 |
if (parse_aline("GUNGLINE", source_p, parc, parv, 0, &user, |
540 |
&host, NULL, NULL, &reason) < 0) |
541 |
return 0; |
542 |
|
543 |
do_sungline(source_p, user, host, reason, 1); |
544 |
return 0; |
545 |
} |
546 |
|
547 |
/* |
548 |
* gline enforces 3 parameters to force operator to give a reason |
549 |
* a gline is not valid with "No reason" |
550 |
* -db |
551 |
*/ |
552 |
static struct Message gline_msgtab = |
553 |
{ |
554 |
"GLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0, |
555 |
{ m_unregistered, m_not_oper, ms_gline, m_ignore, mo_gline, m_ignore } |
556 |
}; |
557 |
|
558 |
static struct Message ungline_msgtab = |
559 |
{ |
560 |
"GUNGLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0, |
561 |
{ m_unregistered, m_not_oper, m_ignore, me_gungline, mo_gungline, m_ignore } |
562 |
}; |
563 |
|
564 |
static void |
565 |
module_init(void) |
566 |
{ |
567 |
mod_add_cmd(&gline_msgtab); |
568 |
mod_add_cmd(&ungline_msgtab); |
569 |
add_capability("GLN", CAP_GLN, 1); |
570 |
} |
571 |
|
572 |
static void |
573 |
module_exit(void) |
574 |
{ |
575 |
mod_del_cmd(&gline_msgtab); |
576 |
mod_del_cmd(&ungline_msgtab); |
577 |
delete_capability("GLN"); |
578 |
} |
579 |
|
580 |
struct module module_entry = |
581 |
{ |
582 |
.node = { NULL, NULL, NULL }, |
583 |
.name = NULL, |
584 |
.version = "$Revision$", |
585 |
.handle = NULL, |
586 |
.modinit = module_init, |
587 |
.modexit = module_exit, |
588 |
.flags = 0 |
589 |
}; |