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Contents of /ircd-hybrid/branches/8.2.x/modules/m_dline.c

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Revision 7434 - (show annotations)
Wed Mar 9 17:49:48 2016 UTC (6 years, 10 months ago) by michael
File MIME type: text/x-chdr
File size: 9872 byte(s)
- m_dline.c, m_kline.c, m_xline.c: use const keyword where appropriate

1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2016 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.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_node *node = NULL, *node_next = NULL;
50
51 DLINK_FOREACH_SAFE(node, node_next, local_client_list.head)
52 {
53 struct Client *client_p = node->data;
54
55 if (IsDead(client_p))
56 continue;
57
58 switch (arec->masktype)
59 {
60 case HM_IPV4:
61 if (client_p->connection->aftype == AF_INET)
62 if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
63 conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
64 break;
65 case HM_IPV6:
66 if (client_p->connection->aftype == AF_INET6)
67 if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
68 conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
69 break;
70 default: break;
71 }
72 }
73
74 DLINK_FOREACH_SAFE(node, node_next, unknown_list.head)
75 {
76 struct Client *client_p = node->data;
77
78 if (IsDead(client_p))
79 continue;
80
81 switch (arec->masktype)
82 {
83 case HM_IPV4:
84 if (client_p->connection->aftype == AF_INET)
85 if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
86 conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
87 break;
88 case HM_IPV6:
89 if (client_p->connection->aftype == AF_INET6)
90 if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
91 conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
92 break;
93 default: break;
94 }
95 }
96 }
97
98 /* dline_add()
99 *
100 * inputs -
101 * output - NONE
102 * side effects - dline as given is placed
103 */
104 static void
105 dline_handle(struct Client *source_p, const char *addr, const char *reason,
106 uintmax_t duration)
107 {
108 char buf[IRCD_BUFSIZE];
109 struct irc_ssaddr daddr;
110 int bits = 0, aftype = 0;
111 struct MaskItem *conf = NULL;
112
113 if (!HasFlag(source_p, FLAGS_SERVICE) && !valid_wild_card(1, addr))
114 {
115 sendto_one_notice(source_p, &me,
116 ":Please include at least %u non-wildcard characters with the mask",
117 ConfigGeneral.min_nonwildcard);
118 return;
119 }
120
121 switch (parse_netmask(addr, &daddr, &bits))
122 {
123 case HM_IPV4:
124 if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_min_cidr)
125 {
126 if (IsClient(source_p))
127 sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
128 ConfigGeneral.dline_min_cidr);
129 return;
130 }
131
132 aftype = AF_INET;
133 break;
134 case HM_IPV6:
135 if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.dline_min_cidr6)
136 {
137 if (IsClient(source_p))
138 sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
139 ConfigGeneral.dline_min_cidr6);
140 return;
141 }
142
143 aftype = AF_INET6;
144 break;
145 default: /* HM_HOST */
146 return;
147 }
148
149 if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1)))
150 {
151 if (IsClient(source_p))
152 sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s",
153 addr, conf->host, conf->reason);
154 return;
155 }
156
157 if (duration)
158 snprintf(buf, sizeof(buf), "Temporary D-line %ju min. - %.*s (%s)",
159 duration / 60, REASONLEN, reason, date_iso8601(0));
160 else
161 snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, reason, date_iso8601(0));
162
163 conf = conf_make(CONF_DLINE);
164 conf->host = xstrdup(addr);
165 conf->reason = xstrdup(buf);
166 conf->setat = CurrentTime;
167 SetConfDatabase(conf);
168
169 if (duration)
170 {
171 conf->until = CurrentTime + duration;
172
173 if (IsClient(source_p))
174 sendto_one_notice(source_p, &me, ":Added temporary %ju min. D-Line [%s]",
175 duration / 60, conf->host);
176
177 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
178 "%s added temporary %ju min. D-Line for [%s] [%s]",
179 get_oper_name(source_p), duration / 60,
180 conf->host, conf->reason);
181 ilog(LOG_TYPE_DLINE, "%s added temporary %ju min. D-Line for [%s] [%s]",
182 get_oper_name(source_p), duration / 60, conf->host, conf->reason);
183 }
184 else
185 {
186 if (IsClient(source_p))
187 sendto_one_notice(source_p, &me, ":Added D-Line [%s]", conf->host);
188
189 sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
190 "%s added D-Line for [%s] [%s]",
191 get_oper_name(source_p), conf->host, conf->reason);
192 ilog(LOG_TYPE_DLINE, "%s added D-Line for [%s] [%s]",
193 get_oper_name(source_p), conf->host, conf->reason);
194 }
195
196 dline_check(add_conf_by_address(CONF_DLINE, conf));
197 }
198
199 /* mo_dline()
200 *
201 * inputs - pointer to server
202 * - pointer to client
203 * - parameter count
204 * - parameter list
205 * output -
206 * side effects - D line is added
207 *
208 */
209 static int
210 mo_dline(struct Client *source_p, int parc, char *parv[])
211 {
212 char *dlhost = NULL, *reason = NULL;
213 char *target_server = NULL;
214 const struct Client *target_p = NULL;
215 uintmax_t duration = 0;
216 int t = 0;
217 char hostip[HOSTIPLEN + 1];
218
219 if (!HasOFlag(source_p, OPER_FLAG_DLINE))
220 {
221 sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "dline");
222 return 0;
223 }
224
225 if (!parse_aline("DLINE", source_p, parc, parv, &dlhost,
226 NULL, &duration, &target_server, &reason))
227 return 0;
228
229 if (target_server)
230 {
231 sendto_match_servs(source_p, target_server, CAPAB_DLN, "DLINE %s %ju %s :%s",
232 target_server, duration,
233 dlhost, reason);
234
235 /* Allow ON to apply local dline as well if it matches */
236 if (match(target_server, me.name))
237 return 0;
238 }
239 else
240 cluster_distribute(source_p, "DLINE", CAPAB_DLN, CLUSTER_DLINE,
241 "%ju %s :%s", duration, dlhost, reason);
242
243 if ((t = parse_netmask(dlhost, NULL, NULL)) == HM_HOST)
244 {
245 if ((target_p = find_chasing(source_p, dlhost)) == NULL)
246 return 0; /* find_chasing sends ERR_NOSUCHNICK */
247
248 if (!MyConnect(target_p))
249 {
250 sendto_one_notice(source_p, &me, ":Cannot DLINE nick on another server");
251 return 0;
252 }
253
254 if (HasFlag(target_p, FLAGS_EXEMPTKLINE))
255 {
256 sendto_one_notice(source_p, &me, ":%s is E-lined", target_p->name);
257 return 0;
258 }
259
260 getnameinfo((const struct sockaddr *)&target_p->connection->ip,
261 target_p->connection->ip.ss_len, hostip,
262 sizeof(hostip), NULL, 0, NI_NUMERICHOST);
263 dlhost = hostip;
264 }
265
266 dline_handle(source_p, dlhost, reason, duration);
267 return 0;
268 }
269
270 /*! \brief DLINE command handler
271 *
272 * \param source_p Pointer to allocated Client struct from which the message
273 * originally comes from. This can be a local or remote client.
274 * \param parc Integer holding the number of supplied arguments.
275 * \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
276 * pointers.
277 * \note Valid arguments for this command are:
278 * - parv[0] = command
279 * - parv[1] = target server mask
280 * - parv[2] = duration in seconds
281 * - parv[3] = IP address
282 * - parv[4] = reason
283 */
284 static int
285 ms_dline(struct Client *source_p, int parc, char *parv[])
286 {
287 const char *dlhost, *reason;
288
289 if (parc != 5 || EmptyString(parv[4]))
290 return 0;
291
292 sendto_match_servs(source_p, parv[1], CAPAB_DLN, "DLINE %s %s %s :%s",
293 parv[1], parv[2], parv[3], parv[4]);
294
295 if (match(parv[1], me.name))
296 return 0;
297
298 dlhost = parv[3];
299 reason = parv[4];
300
301 if (HasFlag(source_p, FLAGS_SERVICE) ||
302 shared_find(SHARED_DLINE, source_p->servptr->name,
303 source_p->username, source_p->host))
304 dline_handle(source_p, dlhost, reason, strtoumax(parv[2], NULL, 10));
305
306 return 0;
307 }
308
309 static struct Message dline_msgtab =
310 {
311 .cmd = "DLINE",
312 .args_min = 2,
313 .args_max = MAXPARA,
314 .handlers[UNREGISTERED_HANDLER] = m_unregistered,
315 .handlers[CLIENT_HANDLER] = m_not_oper,
316 .handlers[SERVER_HANDLER] = ms_dline,
317 .handlers[ENCAP_HANDLER] = m_ignore,
318 .handlers[OPER_HANDLER] = mo_dline
319 };
320
321 static void
322 module_init(void)
323 {
324 mod_add_cmd(&dline_msgtab);
325 add_capability("DLN", CAPAB_DLN);
326 }
327
328 static void
329 module_exit(void)
330 {
331 mod_del_cmd(&dline_msgtab);
332 delete_capability("DLN");
333 }
334
335 struct module module_entry =
336 {
337 .version = "$Revision$",
338 .modinit = module_init,
339 .modexit = module_exit,
340 };

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