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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 "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_misc.h" |
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#include "send.h" |
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#include "s_serv.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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|
| 45 |
#define GLINE_NOT_PLACED 0 |
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#define GLINE_ALREADY_VOTED -1 |
| 47 |
#define GLINE_PLACED 1 |
| 48 |
|
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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(0)); |
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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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} |
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|
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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)); |
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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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/* |
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* Didn't find this user@host gline in pending gline list |
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* so add it. |
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*/ |
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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() |
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* |
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* inputs - The usual for a m_ function |
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* output - |
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* 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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* |
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*/ |
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static int |
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ms_gline(struct Client *source_p, int parc, char *parv[]) |
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{ |
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const char *reason = NULL; /* reason for "victims" demise */ |
| 297 |
const char *user = NULL; |
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const char *host = NULL; /* user and host of GLINE "victim" */ |
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const char *p = NULL; |
| 300 |
|
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if (!IsClient(source_p)) |
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return 0; |
| 303 |
|
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if (parc != 4 || EmptyString(parv[3])) |
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return 0; |
| 306 |
|
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assert(source_p->servptr != NULL); |
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|
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user = parv[1]; |
| 310 |
host = parv[2]; |
| 311 |
reason = parv[3]; |
| 312 |
|
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sendto_server(source_p, CAP_GLN, NOCAPS, ":%s GLINE %s %s :%s", |
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source_p->id, user, host, reason); |
| 315 |
|
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if (!ConfigFileEntry.glines) |
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return 0; |
| 318 |
|
| 319 |
if (!valid_wild_card(source_p, 1, 2, user, host)) |
| 320 |
return 0; |
| 321 |
|
| 322 |
if ((p = strchr(host, '/'))) |
| 323 |
{ |
| 324 |
int bitlen = strtol(++p, NULL, 10); |
| 325 |
int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 : |
| 326 |
ConfigFileEntry.gline_min_cidr; |
| 327 |
|
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if (bitlen < min_bitlen) |
| 329 |
{ |
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sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
| 331 |
"%s is requesting a GLINE with a CIDR mask < %d for [%s@%s] [%s]", |
| 332 |
get_oper_name(source_p), min_bitlen, |
| 333 |
user, host, reason); |
| 334 |
return 0; |
| 335 |
} |
| 336 |
} |
| 337 |
|
| 338 |
/* If at least 3 opers agree this user should be G lined then do it */ |
| 339 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) == |
| 340 |
GLINE_ALREADY_VOTED) |
| 341 |
{ |
| 342 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
| 343 |
"oper or server has already voted"); |
| 344 |
return 0; |
| 345 |
} |
| 346 |
|
| 347 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
| 348 |
"%s requesting G-Line for [%s@%s] [%s]", |
| 349 |
get_oper_name(source_p), |
| 350 |
user, host, reason); |
| 351 |
ilog(LOG_TYPE_GLINE, "G-Line for [%s@%s] [%s] requested by %s", |
| 352 |
user, host, reason, get_oper_name(source_p)); |
| 353 |
return 0; |
| 354 |
} |
| 355 |
|
| 356 |
/*! \brief GLINE command handler (called by operators) |
| 357 |
* |
| 358 |
* \param source_p Pointer to allocated Client struct from which the message |
| 359 |
* originally comes from. This can be a local or remote client. |
| 360 |
* \param parc Integer holding the number of supplied arguments. |
| 361 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
| 362 |
* pointers. |
| 363 |
* \note Valid arguments for this command are: |
| 364 |
* - parv[0] = command |
| 365 |
* - parv[1] = user\@host mask |
| 366 |
* - parv[2] = reason |
| 367 |
*/ |
| 368 |
static int |
| 369 |
mo_gline(struct Client *source_p, int parc, char *parv[]) |
| 370 |
{ |
| 371 |
char *user = NULL; |
| 372 |
char *host = NULL; |
| 373 |
char *reason = NULL; |
| 374 |
char *p; |
| 375 |
|
| 376 |
if (!HasOFlag(source_p, OPER_FLAG_GLINE)) |
| 377 |
{ |
| 378 |
sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "gline"); |
| 379 |
return 0; |
| 380 |
} |
| 381 |
|
| 382 |
if (!ConfigFileEntry.glines) |
| 383 |
{ |
| 384 |
sendto_one_notice(source_p, &me, ":GLINE disabled"); |
| 385 |
return 0; |
| 386 |
} |
| 387 |
|
| 388 |
if (parse_aline("GLINE", source_p, parc, parv, AWILD, |
| 389 |
&user, &host, NULL, NULL, &reason) < 0) |
| 390 |
return 0; |
| 391 |
|
| 392 |
if ((p = strchr(host, '/')) != NULL) |
| 393 |
{ |
| 394 |
int bitlen = strtol(++p, NULL, 10); |
| 395 |
int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 : |
| 396 |
ConfigFileEntry.gline_min_cidr; |
| 397 |
if (bitlen < min_bitlen) |
| 398 |
{ |
| 399 |
sendto_one_notice(source_p, &me, ":Cannot set G-Lines with CIDR length < %d", |
| 400 |
min_bitlen); |
| 401 |
return 0; |
| 402 |
} |
| 403 |
} |
| 404 |
|
| 405 |
/* If at least 3 opers agree this user should be G lined then do it */ |
| 406 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) == |
| 407 |
GLINE_ALREADY_VOTED) |
| 408 |
{ |
| 409 |
sendto_one_notice(source_p, &me, ":This server or oper has already voted"); |
| 410 |
return 0; |
| 411 |
} |
| 412 |
|
| 413 |
/* |
| 414 |
* call these two functions first so the 'requesting' notice always comes |
| 415 |
* before the 'has triggered' notice. -bill |
| 416 |
*/ |
| 417 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
| 418 |
"%s requesting G-Line for [%s@%s] [%s]", |
| 419 |
get_oper_name(source_p), |
| 420 |
user, host, reason); |
| 421 |
ilog(LOG_TYPE_GLINE, "G-Line for [%s@%s] [%s] requested by %s", |
| 422 |
user, host, reason, get_oper_name(source_p)); |
| 423 |
|
| 424 |
sendto_server(NULL, CAP_GLN, NOCAPS, ":%s GLINE %s %s :%s", |
| 425 |
source_p->id, user, host, reason); |
| 426 |
return 0; |
| 427 |
} |
| 428 |
|
| 429 |
static void |
| 430 |
do_sungline(struct Client *source_p, const char *user, |
| 431 |
const char *host, const char *reason, int prop) |
| 432 |
{ |
| 433 |
assert(source_p->servptr != NULL); |
| 434 |
|
| 435 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
| 436 |
"%s requesting UNG-Line for [%s@%s] [%s]", |
| 437 |
get_oper_name(source_p), user, host, reason); |
| 438 |
ilog(LOG_TYPE_GLINE, "UNG-Line for [%s@%s] [%s] requested by %s", |
| 439 |
user, host, reason, get_oper_name(source_p)); |
| 440 |
|
| 441 |
/* If at least 3 opers agree this user should be un G lined then do it */ |
| 442 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_DEL_TYPE) == |
| 443 |
GLINE_ALREADY_VOTED) |
| 444 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
| 445 |
"oper or server has already voted"); |
| 446 |
|
| 447 |
if (prop) |
| 448 |
{ |
| 449 |
sendto_server(source_p, CAP_ENCAP, NOCAPS, |
| 450 |
":%s ENCAP * GUNGLINE %s %s :%s", |
| 451 |
source_p->id, user, host, reason); |
| 452 |
} |
| 453 |
} |
| 454 |
|
| 455 |
/*! \brief GUNGLINE command handler (called in response to an encapsulated |
| 456 |
* GUNGLINE command) |
| 457 |
* |
| 458 |
* \param source_p Pointer to allocated Client struct from which the message |
| 459 |
* originally comes from. This can be a local or remote client. |
| 460 |
* \param parc Integer holding the number of supplied arguments. |
| 461 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
| 462 |
* pointers. |
| 463 |
* \note Valid arguments for this command are: |
| 464 |
* - parv[0] = command |
| 465 |
* - parv[1] = username |
| 466 |
* - parv[2] = hostname |
| 467 |
* - parv[3] = reason |
| 468 |
*/ |
| 469 |
static int |
| 470 |
me_gungline(struct Client *source_p, int parc, char *parv[]) |
| 471 |
{ |
| 472 |
if (ConfigFileEntry.glines) |
| 473 |
do_sungline(source_p, parv[1], parv[2], parv[3], 0); |
| 474 |
return 0; |
| 475 |
} |
| 476 |
|
| 477 |
/*! \brief GUNGLINE command handler (called by operators) |
| 478 |
* |
| 479 |
* \param source_p Pointer to allocated Client struct from which the message |
| 480 |
* originally comes from. This can be a local or remote client. |
| 481 |
* \param parc Integer holding the number of supplied arguments. |
| 482 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
| 483 |
* pointers. |
| 484 |
* \note Valid arguments for this command are: |
| 485 |
* - parv[0] = command |
| 486 |
* - parv[1] = user\@host mask |
| 487 |
* - parv[2] = reason |
| 488 |
*/ |
| 489 |
static int |
| 490 |
mo_gungline(struct Client *source_p, int parc, char *parv[]) |
| 491 |
{ |
| 492 |
char *user = NULL; |
| 493 |
char *host = NULL; |
| 494 |
char *reason = NULL; |
| 495 |
|
| 496 |
if (!HasOFlag(source_p, OPER_FLAG_GLINE)) |
| 497 |
{ |
| 498 |
sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "gline"); |
| 499 |
return 0; |
| 500 |
} |
| 501 |
|
| 502 |
if (!ConfigFileEntry.glines) |
| 503 |
{ |
| 504 |
sendto_one_notice(source_p, &me, ":GUNGLINE disabled"); |
| 505 |
return 0; |
| 506 |
} |
| 507 |
|
| 508 |
if (parse_aline("GUNGLINE", source_p, parc, parv, 0, &user, |
| 509 |
&host, NULL, NULL, &reason) < 0) |
| 510 |
return 0; |
| 511 |
|
| 512 |
do_sungline(source_p, user, host, reason, 1); |
| 513 |
return 0; |
| 514 |
} |
| 515 |
|
| 516 |
/* |
| 517 |
* gline enforces 3 parameters to force operator to give a reason |
| 518 |
* a gline is not valid with "No reason" |
| 519 |
* -db |
| 520 |
*/ |
| 521 |
static struct Message gline_msgtab = |
| 522 |
{ |
| 523 |
"GLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0, |
| 524 |
{ m_unregistered, m_not_oper, ms_gline, m_ignore, mo_gline, m_ignore } |
| 525 |
}; |
| 526 |
|
| 527 |
static struct Message ungline_msgtab = |
| 528 |
{ |
| 529 |
"GUNGLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0, |
| 530 |
{ m_unregistered, m_not_oper, m_ignore, me_gungline, mo_gungline, m_ignore } |
| 531 |
}; |
| 532 |
|
| 533 |
static void |
| 534 |
module_init(void) |
| 535 |
{ |
| 536 |
mod_add_cmd(&gline_msgtab); |
| 537 |
mod_add_cmd(&ungline_msgtab); |
| 538 |
add_capability("GLN", CAP_GLN, 1); |
| 539 |
} |
| 540 |
|
| 541 |
static void |
| 542 |
module_exit(void) |
| 543 |
{ |
| 544 |
mod_del_cmd(&gline_msgtab); |
| 545 |
mod_del_cmd(&ungline_msgtab); |
| 546 |
delete_capability("GLN"); |
| 547 |
} |
| 548 |
|
| 549 |
struct module module_entry = |
| 550 |
{ |
| 551 |
.node = { NULL, NULL, NULL }, |
| 552 |
.name = NULL, |
| 553 |
.version = "$Revision$", |
| 554 |
.handle = NULL, |
| 555 |
.modinit = module_init, |
| 556 |
.modexit = module_exit, |
| 557 |
.flags = 0 |
| 558 |
}; |
