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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) 1997-2015 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file m_kline.c |
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* \brief Includes required functions for processing the KLINE 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 "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 "log.h" |
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#include "misc.h" |
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#include "send.h" |
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#include "server.h" |
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#include "parse.h" |
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#include "modules.h" |
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#include "memory.h" |
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|
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|
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static void |
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kline_check(struct AddressRec *arec) |
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{ |
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dlink_node *node = NULL, *node_next = NULL; |
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|
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DLINK_FOREACH_SAFE(node, node_next, local_client_list.head) |
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{ |
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struct Client *client_p = node->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->connection->aftype == AF_INET) |
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if (match_ipv4(&client_p->connection->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->connection->aftype == AF_INET6) |
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if (match_ipv6(&client_p->connection->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) || !match(arec->Mask.hostname, client_p->sockhost)) |
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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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/* apply_tkline() |
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* |
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* inputs - |
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* output - NONE |
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* side effects - tkline as given is placed |
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*/ |
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static void |
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kline_add(struct Client *source_p, const char *user, const char *host, |
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const char *reason, time_t duration) |
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{ |
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char buf[IRCD_BUFSIZE]; |
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struct MaskItem *conf; |
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|
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if (duration) |
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snprintf(buf, sizeof(buf), "Temporary K-line %ju min. - %.*s (%s)", |
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duration / 60, REASONLEN, reason, date_iso8601(0)); |
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else |
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snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, reason, date_iso8601(0)); |
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|
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conf = conf_make(CONF_KLINE); |
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conf->host = xstrdup(host); |
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conf->user = xstrdup(user); |
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conf->setat = CurrentTime; |
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conf->reason = xstrdup(buf); |
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SetConfDatabase(conf); |
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|
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if (duration) |
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{ |
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conf->until = CurrentTime + duration; |
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|
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if (IsClient(source_p)) |
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sendto_one_notice(source_p, &me, ":Added temporary %ju min. K-Line [%s@%s]", |
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duration / 60, conf->user, conf->host); |
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|
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sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
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"%s added temporary %ju min. K-Line for [%s@%s] [%s]", |
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get_oper_name(source_p), duration / 60, |
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conf->user, conf->host, |
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conf->reason); |
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ilog(LOG_TYPE_KLINE, "%s added temporary %ju min. K-Line for [%s@%s] [%s]", |
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get_oper_name(source_p), duration / 60, |
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conf->user, conf->host, conf->reason); |
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} |
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else |
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{ |
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if (IsClient(source_p)) |
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sendto_one_notice(source_p, &me, ":Added K-Line [%s@%s]", |
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conf->user, conf->host); |
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|
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sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
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"%s added K-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_KLINE, "%s added K-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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|
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kline_check(add_conf_by_address(CONF_KLINE, conf)); |
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} |
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|
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/* already_placed_kline() |
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* inputs - user to complain to, username & host to check for |
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* outputs - returns 1 on existing K-line, 0 if doesn't exist |
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* side effects - notifies source_p if the K-line already exists |
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*/ |
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/* |
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* Note: This currently works if the new K-line is a special case of an |
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* existing K-line, but not the other way round. To do that we would |
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* have to walk the hash and check every existing K-line. -A1kmm. |
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*/ |
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static int |
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already_placed_kline(struct Client *source_p, 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 = NULL; |
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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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if (t == HM_IPV6) |
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aftype = AF_INET6; |
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else |
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aftype = AF_INET; |
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|
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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_KLINE, aftype, user, NULL, 0))) |
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{ |
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if (IsClient(source_p)) |
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sendto_one_notice(source_p, &me, ":[%s@%s] already K-Lined by [%s@%s] - %s", |
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user, host, conf->user, conf->host, conf->reason); |
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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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/* mo_kline() |
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* |
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* inputs - pointer to server |
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* - pointer to client |
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* - parameter count |
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* - parameter list |
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* output - |
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* side effects - k line is added |
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*/ |
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static int |
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mo_kline(struct Client *source_p, int parc, char *parv[]) |
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{ |
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char *reason = NULL; |
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char *user = NULL; |
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char *host = NULL; |
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char *target_server = NULL; |
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time_t duration = 0; |
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int bits = 0; |
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|
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if (!HasOFlag(source_p, OPER_FLAG_KLINE)) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "kline"); |
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return 0; |
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} |
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|
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if (!parse_aline("KLINE", source_p, parc, parv, AWILD, &user, &host, |
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&duration, &target_server, &reason)) |
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return 0; |
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|
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if (target_server) |
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{ |
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sendto_match_servs(source_p, target_server, CAPAB_KLN, "KLINE %s %ju %s %s :%s", |
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target_server, duration, |
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user, host, reason); |
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|
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/* Allow ON to apply local kline as well if it matches */ |
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if (match(target_server, me.name)) |
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return 0; |
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} |
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else |
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cluster_a_line(source_p, "KLINE", CAPAB_KLN, SHARED_KLINE, |
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"%ju %s %s :%s", duration, user, host, reason); |
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|
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if (already_placed_kline(source_p, user, host)) |
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return 0; |
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|
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switch (parse_netmask(host, NULL, &bits)) |
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{ |
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case HM_IPV4: |
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if ((unsigned int)bits < ConfigGeneral.kline_min_cidr) |
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{ |
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sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.", |
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ConfigGeneral.kline_min_cidr); |
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return 0; |
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} |
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|
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break; |
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case HM_IPV6: |
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if ((unsigned int)bits < ConfigGeneral.kline_min_cidr6) |
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{ |
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sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.", |
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ConfigGeneral.kline_min_cidr6); |
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return 0; |
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} |
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|
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break; |
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default: /* HM_HOST */ |
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break; |
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} |
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|
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kline_add(source_p, user, host, reason, duration); |
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return 0; |
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} |
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|
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/* me_kline - handle remote kline. no propagation */ |
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static int |
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ms_kline(struct Client *source_p, int parc, char *parv[]) |
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{ |
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time_t duration = 0; |
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const char *user, *host, *reason; |
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int bits = 0; |
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|
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if (parc != 6 || EmptyString(parv[5])) |
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return 0; |
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|
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/* parv[0] parv[1] parv[2] parv[3] parv[4] parv[5] */ |
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/* command target_server duration user host reason */ |
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sendto_match_servs(source_p, parv[1], CAPAB_KLN, "KLINE %s %s %s %s :%s", |
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parv[1], parv[2], parv[3], parv[4], parv[5]); |
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|
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if (match(parv[1], me.name)) |
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return 0; |
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|
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duration = valid_tkline(parv[2], TK_SECONDS); |
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user = parv[3]; |
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host = parv[4]; |
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reason = parv[5]; |
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|
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if (HasFlag(source_p, FLAGS_SERVICE) || |
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find_matching_name_conf(CONF_SHARED, source_p->servptr->name, |
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source_p->username, source_p->host, |
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SHARED_KLINE)) |
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{ |
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if (!valid_wild_card(source_p, 2, user, host)) |
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return 0; |
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|
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if (already_placed_kline(source_p, user, host)) |
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return 0; |
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|
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switch (parse_netmask(host, NULL, &bits)) |
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{ |
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case HM_IPV4: |
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if ((unsigned int)bits < ConfigGeneral.kline_min_cidr) |
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{ |
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if (IsClient(source_p)) |
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sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.", |
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ConfigGeneral.kline_min_cidr); |
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return 0; |
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} |
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|
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break; |
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case HM_IPV6: |
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if ((unsigned int)bits < ConfigGeneral.kline_min_cidr6) |
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{ |
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if (IsClient(source_p)) |
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sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.", |
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ConfigGeneral.kline_min_cidr6); |
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return 0; |
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} |
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|
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break; |
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default: /* HM_HOST */ |
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break; |
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} |
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|
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kline_add(source_p, user, host, reason, duration); |
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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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static struct Message kline_msgtab = |
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{ |
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.cmd = "KLINE", |
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.args_min = 2, |
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.args_max = MAXPARA, |
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.handlers[UNREGISTERED_HANDLER] = m_unregistered, |
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.handlers[CLIENT_HANDLER] = m_not_oper, |
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.handlers[SERVER_HANDLER] = ms_kline, |
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.handlers[ENCAP_HANDLER] = m_ignore, |
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.handlers[OPER_HANDLER] = mo_kline |
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}; |
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|
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static void |
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module_init(void) |
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{ |
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mod_add_cmd(&kline_msgtab); |
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add_capability("KLN", CAPAB_KLN); |
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} |
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|
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static void |
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module_exit(void) |
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{ |
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mod_del_cmd(&kline_msgtab); |
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delete_capability("KLN"); |
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} |
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|
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struct module module_entry = |
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{ |
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.version = "$Revision$", |
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.modinit = module_init, |
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.modexit = module_exit, |
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}; |