1 |
michael |
1058 |
/* |
2 |
michael |
2810 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
michael |
1058 |
* |
4 |
michael |
8279 |
* Copyright (c) 1997-2018 ircd-hybrid development team |
5 |
michael |
1058 |
* |
6 |
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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 |
17 |
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* along with this program; if not, write to the Free Software |
18 |
michael |
4565 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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michael |
1058 |
* USA |
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*/ |
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|
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michael |
2810 |
/*! \file m_dline.c |
23 |
michael |
3348 |
* \brief Includes required functions for processing the DLINE command. |
24 |
michael |
2810 |
* \version $Id$ |
25 |
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*/ |
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|
27 |
michael |
1058 |
#include "stdinc.h" |
28 |
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#include "list.h" |
29 |
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#include "client.h" |
30 |
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#include "irc_string.h" |
31 |
michael |
1632 |
#include "conf.h" |
32 |
michael |
7209 |
#include "conf_cluster.h" |
33 |
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#include "conf_shared.h" |
34 |
michael |
1058 |
#include "ircd.h" |
35 |
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#include "hostmask.h" |
36 |
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#include "numeric.h" |
37 |
michael |
1309 |
#include "log.h" |
38 |
michael |
3347 |
#include "misc.h" |
39 |
michael |
1058 |
#include "send.h" |
40 |
michael |
8166 |
#include "server_capab.h" |
41 |
michael |
1058 |
#include "parse.h" |
42 |
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#include "modules.h" |
43 |
michael |
1666 |
#include "memory.h" |
44 |
michael |
1058 |
|
45 |
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|
46 |
michael |
3929 |
static void |
47 |
michael |
7435 |
dline_check(const struct AddressRec *arec) |
48 |
michael |
3929 |
{ |
49 |
michael |
8059 |
dlink_node *node, *node_next; |
50 |
michael |
3929 |
|
51 |
michael |
4815 |
DLINK_FOREACH_SAFE(node, node_next, local_client_list.head) |
52 |
michael |
3929 |
{ |
53 |
michael |
4815 |
struct Client *client_p = node->data; |
54 |
michael |
3929 |
|
55 |
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if (IsDead(client_p)) |
56 |
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continue; |
57 |
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|
58 |
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switch (arec->masktype) |
59 |
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{ |
60 |
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case HM_IPV4: |
61 |
michael |
4588 |
if (client_p->connection->aftype == AF_INET) |
62 |
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if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
63 |
michael |
7304 |
conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
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michael |
3929 |
break; |
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case HM_IPV6: |
66 |
michael |
4588 |
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)) |
68 |
michael |
7304 |
conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
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michael |
3929 |
break; |
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default: break; |
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} |
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} |
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|
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michael |
4815 |
DLINK_FOREACH_SAFE(node, node_next, unknown_list.head) |
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michael |
3929 |
{ |
76 |
michael |
4815 |
struct Client *client_p = node->data; |
77 |
michael |
3929 |
|
78 |
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if (IsDead(client_p)) |
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continue; |
80 |
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|
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switch (arec->masktype) |
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{ |
83 |
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case HM_IPV4: |
84 |
michael |
4588 |
if (client_p->connection->aftype == AF_INET) |
85 |
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if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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michael |
7304 |
conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
87 |
michael |
3929 |
break; |
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case HM_IPV6: |
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michael |
4588 |
if (client_p->connection->aftype == AF_INET6) |
90 |
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if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits)) |
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michael |
7304 |
conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason); |
92 |
michael |
3929 |
break; |
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default: break; |
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} |
95 |
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} |
96 |
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} |
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98 |
michael |
5829 |
/* dline_add() |
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michael |
1058 |
* |
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* inputs - |
101 |
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* output - NONE |
102 |
michael |
5829 |
* side effects - dline as given is placed |
103 |
michael |
1058 |
*/ |
104 |
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static void |
105 |
michael |
7673 |
dline_handle(struct Client *source_p, const char *addr, const char *reason, uintmax_t duration) |
106 |
michael |
1058 |
{ |
107 |
michael |
5829 |
char buf[IRCD_BUFSIZE]; |
108 |
michael |
7419 |
struct irc_ssaddr daddr; |
109 |
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int bits = 0, aftype = 0; |
110 |
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struct MaskItem *conf = NULL; |
111 |
michael |
5829 |
|
112 |
michael |
7429 |
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); |
117 |
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return; |
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} |
119 |
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|
120 |
michael |
7419 |
switch (parse_netmask(addr, &daddr, &bits)) |
121 |
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{ |
122 |
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case HM_IPV4: |
123 |
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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.", |
127 |
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ConfigGeneral.dline_min_cidr); |
128 |
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return; |
129 |
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} |
130 |
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131 |
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aftype = AF_INET; |
132 |
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break; |
133 |
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case HM_IPV6: |
134 |
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if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_min_cidr6) |
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{ |
136 |
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if (IsClient(source_p)) |
137 |
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sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.", |
138 |
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ConfigGeneral.dline_min_cidr6); |
139 |
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return; |
140 |
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} |
141 |
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142 |
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aftype = AF_INET6; |
143 |
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break; |
144 |
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default: /* HM_HOST */ |
145 |
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return; |
146 |
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} |
147 |
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148 |
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if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1))) |
149 |
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{ |
150 |
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if (IsClient(source_p)) |
151 |
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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); |
153 |
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return; |
154 |
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} |
155 |
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|
156 |
michael |
6458 |
if (duration) |
157 |
michael |
6782 |
snprintf(buf, sizeof(buf), "Temporary D-line %ju min. - %.*s (%s)", |
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duration / 60, REASONLEN, reason, date_iso8601(0)); |
159 |
michael |
5829 |
else |
160 |
michael |
6422 |
snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, reason, date_iso8601(0)); |
161 |
michael |
5829 |
|
162 |
michael |
7419 |
conf = conf_make(CONF_DLINE); |
163 |
michael |
5829 |
conf->host = xstrdup(addr); |
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conf->reason = xstrdup(buf); |
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conf->setat = CurrentTime; |
166 |
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SetConfDatabase(conf); |
167 |
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|
168 |
michael |
6458 |
if (duration) |
169 |
michael |
1622 |
{ |
170 |
michael |
6458 |
conf->until = CurrentTime + duration; |
171 |
michael |
4639 |
|
172 |
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if (IsClient(source_p)) |
173 |
michael |
6782 |
sendto_one_notice(source_p, &me, ":Added temporary %ju min. D-Line [%s]", |
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duration / 60, conf->host); |
175 |
michael |
4890 |
|
176 |
michael |
6318 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
177 |
michael |
6782 |
"%s added temporary %ju min. D-Line for [%s] [%s]", |
178 |
michael |
6937 |
get_oper_name(source_p), duration / 60, |
179 |
michael |
1632 |
conf->host, conf->reason); |
180 |
michael |
6782 |
ilog(LOG_TYPE_DLINE, "%s added temporary %ju min. D-Line for [%s] [%s]", |
181 |
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get_oper_name(source_p), duration / 60, conf->host, conf->reason); |
182 |
michael |
1622 |
} |
183 |
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else |
184 |
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{ |
185 |
michael |
4639 |
if (IsClient(source_p)) |
186 |
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sendto_one_notice(source_p, &me, ":Added D-Line [%s]", conf->host); |
187 |
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|
188 |
michael |
6318 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
189 |
michael |
1622 |
"%s added D-Line for [%s] [%s]", |
190 |
michael |
1632 |
get_oper_name(source_p), conf->host, conf->reason); |
191 |
michael |
1622 |
ilog(LOG_TYPE_DLINE, "%s added D-Line for [%s] [%s]", |
192 |
michael |
1632 |
get_oper_name(source_p), conf->host, conf->reason); |
193 |
michael |
1622 |
} |
194 |
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|
195 |
michael |
5832 |
dline_check(add_conf_by_address(CONF_DLINE, conf)); |
196 |
michael |
1058 |
} |
197 |
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|
198 |
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/* mo_dline() |
199 |
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* |
200 |
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* inputs - pointer to server |
201 |
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* - pointer to client |
202 |
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* - parameter count |
203 |
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* - parameter list |
204 |
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* output - |
205 |
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* side effects - D line is added |
206 |
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* |
207 |
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*/ |
208 |
michael |
2820 |
static int |
209 |
michael |
3156 |
mo_dline(struct Client *source_p, int parc, char *parv[]) |
210 |
michael |
1058 |
{ |
211 |
michael |
1622 |
char *dlhost = NULL, *reason = NULL; |
212 |
michael |
1301 |
char *target_server = NULL; |
213 |
michael |
1058 |
const struct Client *target_p = NULL; |
214 |
michael |
7330 |
uintmax_t duration = 0; |
215 |
michael |
7419 |
int t = 0; |
216 |
michael |
1398 |
char hostip[HOSTIPLEN + 1]; |
217 |
michael |
1058 |
|
218 |
michael |
1301 |
if (!HasOFlag(source_p, OPER_FLAG_DLINE)) |
219 |
michael |
1058 |
{ |
220 |
michael |
3109 |
sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "dline"); |
221 |
michael |
2820 |
return 0; |
222 |
michael |
1058 |
} |
223 |
|
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|
224 |
michael |
7429 |
if (!parse_aline("DLINE", source_p, parc, parv, &dlhost, |
225 |
michael |
6458 |
NULL, &duration, &target_server, &reason)) |
226 |
michael |
2820 |
return 0; |
227 |
michael |
1058 |
|
228 |
michael |
3368 |
if (target_server) |
229 |
michael |
1301 |
{ |
230 |
michael |
6782 |
sendto_match_servs(source_p, target_server, CAPAB_DLN, "DLINE %s %ju %s :%s", |
231 |
|
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target_server, duration, |
232 |
michael |
2807 |
dlhost, reason); |
233 |
michael |
1301 |
|
234 |
michael |
6432 |
/* Allow ON to apply local dline as well if it matches */ |
235 |
michael |
1652 |
if (match(target_server, me.name)) |
236 |
michael |
2820 |
return 0; |
237 |
michael |
1301 |
} |
238 |
|
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else |
239 |
michael |
7209 |
cluster_distribute(source_p, "DLINE", CAPAB_DLN, CLUSTER_DLINE, |
240 |
|
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"%ju %s :%s", duration, dlhost, reason); |
241 |
michael |
1301 |
|
242 |
michael |
5822 |
if ((t = parse_netmask(dlhost, NULL, NULL)) == HM_HOST) |
243 |
michael |
1058 |
{ |
244 |
michael |
3192 |
if ((target_p = find_chasing(source_p, dlhost)) == NULL) |
245 |
michael |
3737 |
return 0; /* find_chasing sends ERR_NOSUCHNICK */ |
246 |
michael |
1058 |
|
247 |
|
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if (!MyConnect(target_p)) |
248 |
|
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{ |
249 |
michael |
3118 |
sendto_one_notice(source_p, &me, ":Cannot DLINE nick on another server"); |
250 |
michael |
2820 |
return 0; |
251 |
michael |
1058 |
} |
252 |
|
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|
253 |
michael |
6313 |
if (HasFlag(target_p, FLAGS_EXEMPTKLINE)) |
254 |
michael |
1058 |
{ |
255 |
michael |
4934 |
sendto_one_notice(source_p, &me, ":%s is E-lined", target_p->name); |
256 |
michael |
2820 |
return 0; |
257 |
michael |
1058 |
} |
258 |
|
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|
259 |
michael |
5051 |
getnameinfo((const struct sockaddr *)&target_p->connection->ip, |
260 |
michael |
4588 |
target_p->connection->ip.ss_len, hostip, |
261 |
michael |
1123 |
sizeof(hostip), NULL, 0, NI_NUMERICHOST); |
262 |
michael |
1058 |
dlhost = hostip; |
263 |
|
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} |
264 |
|
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|
265 |
michael |
7419 |
dline_handle(source_p, dlhost, reason, duration); |
266 |
michael |
2820 |
return 0; |
267 |
michael |
1058 |
} |
268 |
|
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|
269 |
michael |
7094 |
/*! \brief DLINE command handler |
270 |
|
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* |
271 |
|
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* \param source_p Pointer to allocated Client struct from which the message |
272 |
|
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* originally comes from. This can be a local or remote client. |
273 |
|
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* \param parc Integer holding the number of supplied arguments. |
274 |
|
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* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
275 |
|
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* pointers. |
276 |
|
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* \note Valid arguments for this command are: |
277 |
|
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* - parv[0] = command |
278 |
|
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* - parv[1] = target server mask |
279 |
|
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* - parv[2] = duration in seconds |
280 |
|
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* - parv[3] = IP address |
281 |
|
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* - parv[4] = reason |
282 |
|
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*/ |
283 |
michael |
2820 |
static int |
284 |
michael |
3156 |
ms_dline(struct Client *source_p, int parc, char *parv[]) |
285 |
michael |
1301 |
{ |
286 |
michael |
5829 |
const char *dlhost, *reason; |
287 |
michael |
1301 |
|
288 |
|
|
if (parc != 5 || EmptyString(parv[4])) |
289 |
michael |
2820 |
return 0; |
290 |
michael |
1301 |
|
291 |
michael |
6354 |
sendto_match_servs(source_p, parv[1], CAPAB_DLN, "DLINE %s %s %s :%s", |
292 |
michael |
1301 |
parv[1], parv[2], parv[3], parv[4]); |
293 |
|
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|
294 |
michael |
1652 |
if (match(parv[1], me.name)) |
295 |
michael |
2820 |
return 0; |
296 |
michael |
1301 |
|
297 |
|
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dlhost = parv[3]; |
298 |
|
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reason = parv[4]; |
299 |
|
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|
300 |
michael |
2810 |
if (HasFlag(source_p, FLAGS_SERVICE) || |
301 |
michael |
7209 |
shared_find(SHARED_DLINE, source_p->servptr->name, |
302 |
|
|
source_p->username, source_p->host)) |
303 |
michael |
7423 |
dline_handle(source_p, dlhost, reason, strtoumax(parv[2], NULL, 10)); |
304 |
michael |
5805 |
|
305 |
michael |
2820 |
return 0; |
306 |
michael |
1301 |
} |
307 |
|
|
|
308 |
michael |
2810 |
static struct Message dline_msgtab = |
309 |
|
|
{ |
310 |
michael |
5881 |
.cmd = "DLINE", |
311 |
|
|
.args_min = 2, |
312 |
|
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.args_max = MAXPARA, |
313 |
|
|
.handlers[UNREGISTERED_HANDLER] = m_unregistered, |
314 |
|
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.handlers[CLIENT_HANDLER] = m_not_oper, |
315 |
|
|
.handlers[SERVER_HANDLER] = ms_dline, |
316 |
|
|
.handlers[ENCAP_HANDLER] = m_ignore, |
317 |
|
|
.handlers[OPER_HANDLER] = mo_dline |
318 |
michael |
1230 |
}; |
319 |
|
|
|
320 |
|
|
static void |
321 |
|
|
module_init(void) |
322 |
|
|
{ |
323 |
|
|
mod_add_cmd(&dline_msgtab); |
324 |
michael |
8166 |
capab_add("DLN", CAPAB_DLN); |
325 |
michael |
1230 |
} |
326 |
|
|
|
327 |
|
|
static void |
328 |
|
|
module_exit(void) |
329 |
|
|
{ |
330 |
|
|
mod_del_cmd(&dline_msgtab); |
331 |
michael |
8166 |
capab_del("DLN"); |
332 |
michael |
1230 |
} |
333 |
|
|
|
334 |
michael |
2810 |
struct module module_entry = |
335 |
|
|
{ |
336 |
michael |
1230 |
.version = "$Revision$", |
337 |
|
|
.modinit = module_init, |
338 |
|
|
.modexit = module_exit, |
339 |
|
|
}; |