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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) 1997-2018 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_dline.c |
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* \brief Includes required functions for processing the DLINE 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 "conf.h" |
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#include "conf_cluster.h" |
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#include "conf_shared.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 "log.h" |
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#include "misc.h" |
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#include "send.h" |
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#include "server_capab.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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dline_check(const struct AddressRec *arec) |
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{ |
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dlink_node *node, *node_next; |
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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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switch (arec->masktype) |
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{ |
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case HM_IPV4: |
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if (client_p->ip.ss.ss_family == AF_INET) |
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if (match_ipv4(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
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break; |
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case HM_IPV6: |
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if (client_p->ip.ss.ss_family == AF_INET6) |
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if (match_ipv6(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
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break; |
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default: break; |
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} |
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} |
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|
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DLINK_FOREACH_SAFE(node, node_next, unknown_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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switch (arec->masktype) |
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{ |
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case HM_IPV4: |
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if (client_p->ip.ss.ss_family == AF_INET) |
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if (match_ipv4(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
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break; |
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case HM_IPV6: |
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if (client_p->ip.ss.ss_family == AF_INET6) |
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if (match_ipv6(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
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break; |
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default: break; |
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} |
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} |
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} |
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|
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/* dline_add() |
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* |
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* inputs - |
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* output - NONE |
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* side effects - dline as given is placed |
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*/ |
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static void |
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dline_handle(struct Client *source_p, const char *addr, const char *reason, uintmax_t duration) |
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{ |
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char buf[IRCD_BUFSIZE]; |
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struct irc_ssaddr daddr; |
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int bits = 0, aftype = 0; |
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|
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if (!HasFlag(source_p, FLAGS_SERVICE) && !valid_wild_card(1, addr)) |
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{ |
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sendto_one_notice(source_p, &me, |
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":Please include at least %u non-wildcard characters with the mask", |
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ConfigGeneral.min_nonwildcard); |
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return; |
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} |
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|
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switch (parse_netmask(addr, &daddr, &bits)) |
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{ |
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case HM_IPV4: |
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if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_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.dline_min_cidr); |
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return; |
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} |
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|
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aftype = AF_INET; |
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break; |
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case HM_IPV6: |
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if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_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.dline_min_cidr6); |
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return; |
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} |
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|
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aftype = AF_INET6; |
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break; |
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default: /* HM_HOST */ |
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return; |
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} |
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|
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struct MaskItem *conf; |
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if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1))) |
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{ |
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if (IsClient(source_p)) |
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sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s", |
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addr, conf->host, conf->reason); |
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return; |
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} |
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|
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if (duration) |
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snprintf(buf, sizeof(buf), "Temporary D-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_DLINE); |
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conf->host = xstrdup(addr); |
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conf->reason = xstrdup(buf); |
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conf->setat = CurrentTime; |
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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. D-Line [%s]", |
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duration / 60, 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. D-Line for [%s] [%s]", |
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get_oper_name(source_p), duration / 60, |
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conf->host, conf->reason); |
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ilog(LOG_TYPE_DLINE, "%s added temporary %ju min. D-Line for [%s] [%s]", |
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get_oper_name(source_p), duration / 60, 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 D-Line [%s]", 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 D-Line for [%s] [%s]", |
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get_oper_name(source_p), conf->host, conf->reason); |
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ilog(LOG_TYPE_DLINE, "%s added D-Line for [%s] [%s]", |
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get_oper_name(source_p), conf->host, conf->reason); |
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} |
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|
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dline_check(add_conf_by_address(CONF_DLINE, conf)); |
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} |
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|
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/* mo_dline() |
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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 - D line is added |
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* |
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*/ |
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static int |
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mo_dline(struct Client *source_p, int parc, char *parv[]) |
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{ |
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char *dlhost = NULL, *reason = NULL; |
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char *target_server = NULL; |
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const struct Client *target_p = NULL; |
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uintmax_t duration = 0; |
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int t = 0; |
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char hostip[HOSTIPLEN + 1]; |
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|
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if (!HasOFlag(source_p, OPER_FLAG_DLINE)) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "dline"); |
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return 0; |
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} |
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|
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if (!parse_aline("DLINE", source_p, parc, parv, &dlhost, |
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NULL, &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_DLN, "DLINE %s %ju %s :%s", |
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target_server, duration, |
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dlhost, reason); |
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|
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/* Allow ON to apply local dline 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_distribute(source_p, "DLINE", CAPAB_DLN, CLUSTER_DLINE, |
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"%ju %s :%s", duration, dlhost, reason); |
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|
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if ((t = parse_netmask(dlhost, NULL, NULL)) == HM_HOST) |
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{ |
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if ((target_p = find_chasing(source_p, dlhost)) == NULL) |
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return 0; /* find_chasing sends ERR_NOSUCHNICK */ |
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|
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if (!MyConnect(target_p)) |
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{ |
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sendto_one_notice(source_p, &me, ":Cannot DLINE nick on another server"); |
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return 0; |
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} |
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|
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if (HasFlag(target_p, FLAGS_EXEMPTKLINE)) |
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{ |
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sendto_one_notice(source_p, &me, ":%s is E-lined", target_p->name); |
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return 0; |
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} |
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|
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getnameinfo((const struct sockaddr *)&target_p->ip, target_p->ip.ss_len, |
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hostip, sizeof(hostip), NULL, 0, NI_NUMERICHOST); |
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dlhost = hostip; |
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} |
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|
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dline_handle(source_p, dlhost, reason, duration); |
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return 0; |
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} |
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|
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/*! \brief DLINE command handler |
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* |
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* \param source_p Pointer to allocated Client struct from which the message |
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* originally comes from. This can be a local or remote client. |
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* \param parc Integer holding the number of supplied arguments. |
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* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
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* pointers. |
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* \note Valid arguments for this command are: |
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* - parv[0] = command |
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* - parv[1] = target server mask |
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* - parv[2] = duration in seconds |
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* - parv[3] = IP address |
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* - parv[4] = reason |
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*/ |
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static int |
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ms_dline(struct Client *source_p, int parc, char *parv[]) |
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{ |
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const char *dlhost, *reason; |
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|
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if (parc != 5 || EmptyString(parv[4])) |
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return 0; |
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|
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sendto_match_servs(source_p, parv[1], CAPAB_DLN, "DLINE %s %s %s :%s", |
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parv[1], parv[2], parv[3], parv[4]); |
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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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dlhost = parv[3]; |
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reason = parv[4]; |
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|
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if (HasFlag(source_p, FLAGS_SERVICE) || |
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shared_find(SHARED_DLINE, source_p->servptr->name, |
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source_p->username, source_p->host)) |
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dline_handle(source_p, dlhost, reason, strtoumax(parv[2], NULL, 10)); |
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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 dline_msgtab = |
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{ |
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.cmd = "DLINE", |
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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_dline, |
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.handlers[ENCAP_HANDLER] = m_ignore, |
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.handlers[OPER_HANDLER] = mo_dline |
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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(&dline_msgtab); |
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capab_add("DLN", CAPAB_DLN); |
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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(&dline_msgtab); |
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capab_del("DLN"); |
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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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}; |
