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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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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 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 "sprintf_irc.h" |
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#include "ircd.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 "conf.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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|
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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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/*! \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 AccessItem *aconf = map_to_conf(make_conf_item(GLINE_TYPE)); |
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|
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snprintf(buffer, sizeof(buffer), "%s (%s)", reason, smalldate(CurrentTime)); |
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DupString(aconf->reason, buffer); |
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DupString(aconf->user, user); |
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DupString(aconf->host, host); |
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|
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aconf->setat = CurrentTime; |
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aconf->hold = CurrentTime + ConfigFileEntry.gline_time; |
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SetConfTemporary(aconf); |
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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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aconf->user, aconf->host, aconf->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), aconf->user, aconf->host, aconf->reason); |
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|
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add_conf_by_address(CONF_GLINE, aconf); |
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rehashed_klines = 1; |
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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 AccessItem *aconf; |
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int t; |
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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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t = AF_INET6; |
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else |
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#endif |
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t = AF_INET; |
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piphost = &iphost; |
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} |
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else |
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{ |
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t = 0; |
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piphost = NULL; |
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} |
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|
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if ((aconf = find_conf_by_address(host, piphost, CONF_GLINE, t, user, NULL, 0))) |
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{ |
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delete_one_address_conf(host, aconf); |
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return 1; |
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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 |
243 |
* so add it. |
244 |
*/ |
245 |
add_new_majority(source_p, user, host, reason, type); |
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return GLINE_NOT_PLACED; |
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} |
248 |
|
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static void |
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do_sgline(struct Client *source_p, int parc, char *parv[], int prop) |
251 |
{ |
252 |
const char *reason = NULL; /* reason for "victims" demise */ |
253 |
const char *user = NULL; |
254 |
const char *host = NULL; /* user and host of GLINE "victim" */ |
255 |
|
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if (!IsClient(source_p)) |
257 |
return; |
258 |
|
259 |
if (parc != 4 || EmptyString(parv[3])) |
260 |
return; |
261 |
|
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assert(source_p->servptr != NULL); |
263 |
|
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user = parv[1]; |
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host = parv[2]; |
266 |
reason = parv[3]; |
267 |
|
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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); |
271 |
sendto_server(source_p->from, CAP_GLN, CAP_TS6, |
272 |
":%s GLINE %s %s :%s", |
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source_p->name, user, host, reason); |
274 |
|
275 |
if (ConfigFileEntry.glines) |
276 |
{ |
277 |
if (!valid_wild_card(source_p, 1, 2, user, host)) |
278 |
return; |
279 |
|
280 |
if (IsClient(source_p)) |
281 |
{ |
282 |
const char *p = NULL; |
283 |
|
284 |
if ((p = strchr(host, '/'))) |
285 |
{ |
286 |
int bitlen = strtol(++p, NULL, 10); |
287 |
int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 : |
288 |
ConfigFileEntry.gline_min_cidr; |
289 |
|
290 |
if (bitlen < min_bitlen) |
291 |
{ |
292 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
293 |
"%s is requesting a GLINE with a CIDR mask < %d for [%s@%s] [%s]", |
294 |
get_oper_name(source_p), min_bitlen, |
295 |
user, host, reason); |
296 |
return; |
297 |
} |
298 |
} |
299 |
} |
300 |
|
301 |
/* If at least 3 opers agree this user should be G lined then do it */ |
302 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) == |
303 |
GLINE_ALREADY_VOTED) |
304 |
{ |
305 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
306 |
"oper or server has already voted"); |
307 |
return; |
308 |
} |
309 |
|
310 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
311 |
"%s requesting G-Line for [%s@%s] [%s]", |
312 |
get_oper_name(source_p), |
313 |
user, host, reason); |
314 |
ilog(LOG_TYPE_GLINE, "#gline for %s@%s [%s] requested by %s", |
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user, host, reason, get_oper_name(source_p)); |
316 |
} |
317 |
} |
318 |
|
319 |
|
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/*! \brief GLINE command handler (called by operators) |
321 |
* |
322 |
* \param client_p Pointer to allocated Client struct with physical connection |
323 |
* to this server, i.e. with an open socket connected. |
324 |
* \param source_p Pointer to allocated Client struct from which the message |
325 |
* originally comes from. This can be a local or remote client. |
326 |
* \param parc Integer holding the number of supplied arguments. |
327 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
328 |
* pointers. |
329 |
* \note Valid arguments for this command are: |
330 |
* - parv[0] = sender prefix |
331 |
* - parv[1] = user\@host mask |
332 |
* - parv[2] = reason |
333 |
*/ |
334 |
static void |
335 |
mo_gline(struct Client *client_p, struct Client *source_p, |
336 |
int parc, char *parv[]) |
337 |
{ |
338 |
char *user = NULL; |
339 |
char *host = NULL; |
340 |
char *reason = NULL; |
341 |
char *p; |
342 |
|
343 |
if (!HasOFlag(source_p, OPER_FLAG_GLINE)) |
344 |
{ |
345 |
sendto_one(source_p, form_str(ERR_NOPRIVS), |
346 |
me.name, source_p->name, "gline"); |
347 |
return; |
348 |
} |
349 |
|
350 |
if (!ConfigFileEntry.glines) |
351 |
{ |
352 |
sendto_one(source_p, ":%s NOTICE %s :GLINE disabled", |
353 |
me.name, source_p->name); |
354 |
return; |
355 |
} |
356 |
|
357 |
if (parse_aline("GLINE", source_p, parc, parv, AWILD, |
358 |
&user, &host, NULL, NULL, &reason) < 0) |
359 |
return; |
360 |
|
361 |
if ((p = strchr(host, '/')) != NULL) |
362 |
{ |
363 |
int bitlen = strtol(++p, NULL, 10); |
364 |
int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 : |
365 |
ConfigFileEntry.gline_min_cidr; |
366 |
if (bitlen < min_bitlen) |
367 |
{ |
368 |
sendto_one(source_p, ":%s NOTICE %s :Cannot set G-Lines with CIDR length < %d", |
369 |
me.name, source_p->name, min_bitlen); |
370 |
return; |
371 |
} |
372 |
} |
373 |
|
374 |
/* If at least 3 opers agree this user should be G lined then do it */ |
375 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) == |
376 |
GLINE_ALREADY_VOTED) |
377 |
{ |
378 |
sendto_one(source_p, |
379 |
":%s NOTICE %s :This server or oper has already voted", |
380 |
me.name, source_p->name); |
381 |
return; |
382 |
} |
383 |
|
384 |
/* |
385 |
* call these two functions first so the 'requesting' notice always comes |
386 |
* before the 'has triggered' notice. -bill |
387 |
*/ |
388 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
389 |
"%s requesting G-Line for [%s@%s] [%s]", |
390 |
get_oper_name(source_p), |
391 |
user, host, reason); |
392 |
ilog(LOG_TYPE_GLINE, "#gline for %s@%s [%s] requested by %s!%s@%s", |
393 |
user, host, reason, source_p->name, source_p->username, |
394 |
source_p->host); |
395 |
|
396 |
/* 4 param version for hyb-7 servers */ |
397 |
sendto_server(NULL, CAP_GLN|CAP_TS6, NOCAPS, |
398 |
":%s GLINE %s %s :%s", |
399 |
ID(source_p), user, host, reason); |
400 |
sendto_server(NULL, CAP_GLN, CAP_TS6, |
401 |
":%s GLINE %s %s :%s", |
402 |
source_p->name, user, host, reason); |
403 |
} |
404 |
|
405 |
/* ms_gline() |
406 |
* me_gline() |
407 |
* do_sgline() |
408 |
* |
409 |
* inputs - The usual for a m_ function |
410 |
* output - |
411 |
* side effects - |
412 |
* |
413 |
* Place a G line if 3 opers agree on the identical user@host |
414 |
* |
415 |
* Allow this server to pass along GLINE if received and |
416 |
* GLINES is not defined. |
417 |
* |
418 |
* ENCAP'd GLINES are propagated by encap code. |
419 |
*/ |
420 |
|
421 |
static void |
422 |
ms_gline(struct Client *client_p, struct Client *source_p, |
423 |
int parc, char *parv[]) |
424 |
{ |
425 |
do_sgline(source_p, parc, parv, 1); |
426 |
} |
427 |
|
428 |
static void |
429 |
me_gline(struct Client *client_p, struct Client *source_p, |
430 |
int parc, char *parv[]) |
431 |
{ |
432 |
do_sgline(source_p, parc, parv, 0); |
433 |
} |
434 |
|
435 |
static void |
436 |
do_sungline(struct Client *source_p, const char *user, |
437 |
const char *host, const char *reason, int prop) |
438 |
{ |
439 |
assert(source_p->servptr != NULL); |
440 |
|
441 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
442 |
"%s requesting UNG-Line for [%s@%s] [%s]", |
443 |
get_oper_name(source_p), user, host, reason); |
444 |
ilog(LOG_TYPE_GLINE, "#ungline for %s@%s [%s] requested by %s", |
445 |
user, host, reason, get_oper_name(source_p)); |
446 |
|
447 |
/* If at least 3 opers agree this user should be un G lined then do it */ |
448 |
if (check_majority(source_p, user, host, reason, GLINE_PENDING_DEL_TYPE) == |
449 |
GLINE_ALREADY_VOTED) |
450 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
451 |
"oper or server has already voted"); |
452 |
|
453 |
if (prop) |
454 |
{ |
455 |
sendto_server(source_p->from, CAP_ENCAP|CAP_TS6, NOCAPS, |
456 |
":%s ENCAP * GUNGLINE %s %s :%s", |
457 |
ID(source_p), user, host, reason); |
458 |
sendto_server(source_p->from, CAP_ENCAP, CAP_TS6, |
459 |
":%s ENCAP * GUNGLINE %s %s :%s", |
460 |
source_p->name, user, host, reason); |
461 |
} |
462 |
} |
463 |
|
464 |
/*! \brief GUNGLINE command handler (called in response to an encapsulated |
465 |
* GUNGLINE command) |
466 |
* |
467 |
* \param client_p Pointer to allocated Client struct with physical connection |
468 |
* to this server, i.e. with an open socket connected. |
469 |
* \param source_p Pointer to allocated Client struct from which the message |
470 |
* originally comes from. This can be a local or remote client. |
471 |
* \param parc Integer holding the number of supplied arguments. |
472 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
473 |
* pointers. |
474 |
* \note Valid arguments for this command are: |
475 |
* - parv[0] = sender prefix |
476 |
* - parv[1] = username |
477 |
* - parv[2] = hostname |
478 |
* - parv[3] = reason |
479 |
*/ |
480 |
static void |
481 |
me_gungline(struct Client *client_p, struct Client *source_p, |
482 |
int parc, char *parv[]) |
483 |
{ |
484 |
if (ConfigFileEntry.glines) |
485 |
do_sungline(source_p, parv[1], parv[2], parv[3], 0); |
486 |
} |
487 |
|
488 |
/*! \brief GUNGLINE command handler (called by operators) |
489 |
* |
490 |
* \param client_p Pointer to allocated Client struct with physical connection |
491 |
* to this server, i.e. with an open socket connected. |
492 |
* \param source_p Pointer to allocated Client struct from which the message |
493 |
* originally comes from. This can be a local or remote client. |
494 |
* \param parc Integer holding the number of supplied arguments. |
495 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
496 |
* pointers. |
497 |
* \note Valid arguments for this command are: |
498 |
* - parv[0] = sender prefix |
499 |
* - parv[1] = user\@host mask |
500 |
* - parv[2] = reason |
501 |
*/ |
502 |
static void |
503 |
mo_gungline(struct Client *client_p, struct Client *source_p, |
504 |
int parc, char *parv[]) |
505 |
{ |
506 |
char *user = NULL; |
507 |
char *host = NULL; |
508 |
char *reason = NULL; |
509 |
|
510 |
if (!HasOFlag(source_p, OPER_FLAG_GLINE)) |
511 |
{ |
512 |
sendto_one(source_p, form_str(ERR_NOPRIVS), |
513 |
me.name, source_p->name, "gline"); |
514 |
return; |
515 |
} |
516 |
|
517 |
if (!ConfigFileEntry.glines) |
518 |
{ |
519 |
sendto_one(source_p, ":%s NOTICE %s :GUNGLINE disabled", |
520 |
me.name, source_p->name); |
521 |
return; |
522 |
} |
523 |
|
524 |
if (parse_aline("GUNGLINE", source_p, parc, parv, 0, &user, |
525 |
&host, NULL, NULL, &reason) < 0) |
526 |
return; |
527 |
|
528 |
do_sungline(source_p, user, host, reason, 1); |
529 |
} |
530 |
|
531 |
/* |
532 |
* gline enforces 3 parameters to force operator to give a reason |
533 |
* a gline is not valid with "No reason" |
534 |
* -db |
535 |
*/ |
536 |
static struct Message gline_msgtab = { |
537 |
"GLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0, |
538 |
{ m_unregistered, m_not_oper, ms_gline, me_gline, mo_gline, m_ignore } |
539 |
}; |
540 |
|
541 |
static struct Message ungline_msgtab = { |
542 |
"GUNGLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0, |
543 |
{ m_unregistered, m_not_oper, m_ignore, me_gungline, mo_gungline, m_ignore } |
544 |
}; |
545 |
|
546 |
static void |
547 |
module_init(void) |
548 |
{ |
549 |
mod_add_cmd(&gline_msgtab); |
550 |
mod_add_cmd(&ungline_msgtab); |
551 |
add_capability("GLN", CAP_GLN, 1); |
552 |
} |
553 |
|
554 |
static void |
555 |
module_exit(void) |
556 |
{ |
557 |
mod_del_cmd(&gline_msgtab); |
558 |
mod_del_cmd(&ungline_msgtab); |
559 |
delete_capability("GLN"); |
560 |
} |
561 |
|
562 |
struct module module_entry = { |
563 |
.node = { NULL, NULL, NULL }, |
564 |
.name = NULL, |
565 |
.version = "$Revision$", |
566 |
.handle = NULL, |
567 |
.modinit = module_init, |
568 |
.modexit = module_exit, |
569 |
.flags = 0 |
570 |
}; |