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root/svn/ircd-hybrid/trunk/modules/m_dline.c
Revision: 8752
Committed: Tue Jan 1 11:07:01 2019 UTC (5 years, 2 months ago) by michael
Content type: text/x-csrc
File size: 8355 byte(s)
Log Message:
- Update copyright years

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2019 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 /*! \file m_dline.c
23 * \brief Includes required functions for processing the DLINE command.
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "list.h"
29 #include "client.h"
30 #include "irc_string.h"
31 #include "conf.h"
32 #include "conf_cluster.h"
33 #include "conf_shared.h"
34 #include "ircd.h"
35 #include "hostmask.h"
36 #include "numeric.h"
37 #include "log.h"
38 #include "misc.h"
39 #include "send.h"
40 #include "server_capab.h"
41 #include "parse.h"
42 #include "modules.h"
43 #include "memory.h"
44
45
46 static void
47 dline_check(const struct AddressRec *arec)
48 {
49 dlink_list *tab[] = { &local_client_list, &unknown_list, NULL };
50
51 for (dlink_list **list = tab; *list; ++list)
52 {
53 dlink_node *node, *node_next;
54
55 DLINK_FOREACH_SAFE(node, node_next, (*list)->head)
56 {
57 struct Client *client_p = node->data;
58
59 if (IsDead(client_p))
60 continue;
61
62 switch (arec->masktype)
63 {
64 case HM_IPV4:
65 if (client_p->ip.ss.ss_family == AF_INET)
66 if (match_ipv4(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
67 conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
68 break;
69 case HM_IPV6:
70 if (client_p->ip.ss.ss_family == AF_INET6)
71 if (match_ipv6(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
72 conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
73 break;
74 default: break;
75 }
76 }
77 }
78 }
79
80 /* dline_add()
81 *
82 * inputs -
83 * output - NONE
84 * side effects - dline as given is placed
85 */
86 static void
87 dline_handle(struct Client *source_p, struct aline_ctx *aline)
88 {
89 char buf[IRCD_BUFSIZE];
90 struct irc_ssaddr addr;
91 int bits = 0, aftype = 0;
92
93 switch (parse_netmask(aline->host, &addr, &bits))
94 {
95 case HM_IPV4:
96 if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_min_cidr)
97 {
98 if (IsClient(source_p))
99 sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
100 ConfigGeneral.dline_min_cidr);
101 return;
102 }
103
104 aftype = AF_INET;
105 break;
106 case HM_IPV6:
107 if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_min_cidr6)
108 {
109 if (IsClient(source_p))
110 sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
111 ConfigGeneral.dline_min_cidr6);
112 return;
113 }
114
115 aftype = AF_INET6;
116 break;
117 default: /* HM_HOST */
118 if (IsClient(source_p))
119 sendto_one_notice(source_p, &me, ":Invalid D-Line");
120
121 return;
122 }
123
124 struct MaskItem *conf;
125 if ((conf = find_conf_by_address(NULL, &addr, CONF_DLINE, aftype, NULL, NULL, 1)))
126 {
127 if (IsClient(source_p))
128 sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s",
129 aline->host, conf->host, conf->reason);
130 return;
131 }
132
133 if (aline->duration)
134 snprintf(buf, sizeof(buf), "Temporary D-line %ju min. - %.*s (%s)",
135 aline->duration / 60, REASONLEN, aline->reason, date_iso8601(0));
136 else
137 snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, aline->reason, date_iso8601(0));
138
139 conf = conf_make(CONF_DLINE);
140 conf->host = xstrdup(aline->host);
141 conf->reason = xstrdup(buf);
142 conf->setat = CurrentTime;
143 SetConfDatabase(conf);
144
145 if (aline->duration)
146 {
147 conf->until = CurrentTime + aline->duration;
148
149 if (IsClient(source_p))
150 sendto_one_notice(source_p, &me, ":Added temporary %ju min. D-Line [%s]",
151 aline->duration / 60, conf->host);
152
153 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
154 "%s added temporary %ju min. D-Line for [%s] [%s]",
155 get_oper_name(source_p), aline->duration / 60,
156 conf->host, conf->reason);
157 ilog(LOG_TYPE_DLINE, "%s added temporary %ju min. D-Line for [%s] [%s]",
158 get_oper_name(source_p), aline->duration / 60, conf->host, conf->reason);
159 }
160 else
161 {
162 if (IsClient(source_p))
163 sendto_one_notice(source_p, &me, ":Added D-Line [%s]", conf->host);
164
165 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
166 "%s added D-Line for [%s] [%s]",
167 get_oper_name(source_p), conf->host, conf->reason);
168 ilog(LOG_TYPE_DLINE, "%s added D-Line for [%s] [%s]",
169 get_oper_name(source_p), conf->host, conf->reason);
170 }
171
172 dline_check(add_conf_by_address(CONF_DLINE, conf));
173 }
174
175 /* mo_dline()
176 *
177 * inputs - pointer to server
178 * - pointer to client
179 * - parameter count
180 * - parameter list
181 * output -
182 * side effects - D line is added
183 *
184 */
185 static int
186 mo_dline(struct Client *source_p, int parc, char *parv[])
187 {
188 struct aline_ctx aline = { .add = true, .simple_mask = false };
189
190 if (!HasOFlag(source_p, OPER_FLAG_DLINE))
191 {
192 sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "dline");
193 return 0;
194 }
195
196 if (parse_aline("DLINE", source_p, parc, parv, &aline) == false)
197 return 0;
198
199 if (aline.server)
200 {
201 sendto_match_servs(source_p, aline.server, CAPAB_DLN, "DLINE %s %ju %s :%s",
202 aline.server, aline.duration, aline.host, aline.reason);
203
204 /* Allow ON to apply local dline as well if it matches */
205 if (match(aline.server, me.name))
206 return 0;
207 }
208 else
209 cluster_distribute(source_p, "DLINE", CAPAB_DLN, CLUSTER_DLINE,
210 "%ju %s :%s", aline.duration, aline.host, aline.reason);
211
212 dline_handle(source_p, &aline);
213 return 0;
214 }
215
216 /*! \brief DLINE command handler
217 *
218 * \param source_p Pointer to allocated Client struct from which the message
219 * originally comes from. This can be a local or remote client.
220 * \param parc Integer holding the number of supplied arguments.
221 * \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
222 * pointers.
223 * \note Valid arguments for this command are:
224 * - parv[0] = command
225 * - parv[1] = target server mask
226 * - parv[2] = duration in seconds
227 * - parv[3] = IP address
228 * - parv[4] = reason
229 */
230 static int
231 ms_dline(struct Client *source_p, int parc, char *parv[])
232 {
233 struct aline_ctx aline =
234 {
235 .add = true,
236 .simple_mask = false,
237 .host = parv[3],
238 .reason = parv[4],
239 .server = parv[1],
240 .duration = strtoumax(parv[2], NULL, 10)
241 };
242
243 if (parc != 5 || EmptyString(parv[parc - 1]))
244 return 0;
245
246 sendto_match_servs(source_p, aline.server, CAPAB_DLN, "DLINE %s %ju %s :%s",
247 aline.server, aline.duration, aline.host, aline.reason);
248
249 if (match(aline.server, me.name))
250 return 0;
251
252 if (HasFlag(source_p, FLAGS_SERVICE) ||
253 shared_find(SHARED_DLINE, source_p->servptr->name,
254 source_p->username, source_p->host))
255 dline_handle(source_p, &aline);
256
257 return 0;
258 }
259
260 static struct Message dline_msgtab =
261 {
262 .cmd = "DLINE",
263 .args_min = 2,
264 .args_max = MAXPARA,
265 .handlers[UNREGISTERED_HANDLER] = m_unregistered,
266 .handlers[CLIENT_HANDLER] = m_not_oper,
267 .handlers[SERVER_HANDLER] = ms_dline,
268 .handlers[ENCAP_HANDLER] = m_ignore,
269 .handlers[OPER_HANDLER] = mo_dline
270 };
271
272 static void
273 module_init(void)
274 {
275 mod_add_cmd(&dline_msgtab);
276 capab_add("DLN", CAPAB_DLN);
277 }
278
279 static void
280 module_exit(void)
281 {
282 mod_del_cmd(&dline_msgtab);
283 capab_del("DLN");
284 }
285
286 struct module module_entry =
287 {
288 .version = "$Revision$",
289 .modinit = module_init,
290 .modexit = module_exit,
291 };

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