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1 | /* modules/m_services.c | |
2 | * Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk> | |
3 | * Copyright (C) 2005 ircd-ratbox development team | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions are | |
7 | * met: | |
8 | * | |
9 | * 1.Redistributions of source code must retain the above copyright notice, | |
10 | * this list of conditions and the following disclaimer. | |
11 | * 2.Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * 3.The name of the author may not be used to endorse or promote products | |
15 | * derived from this software without specific prior written permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
20 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
21 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
23 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
25 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
26 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
27 | * POSSIBILITY OF SUCH DAMAGE. | |
28 | * | |
29 | * $Id: m_services.c 1907 2006-08-29 19:18:15Z jilles $ | |
30 | */ | |
31 | ||
32 | #include "stdinc.h" | |
33 | ||
34 | #include "send.h" | |
35 | #include "channel.h" | |
36 | #include "client.h" | |
37 | #include "common.h" | |
38 | #include "config.h" | |
39 | #include "ircd.h" | |
40 | #include "numeric.h" | |
41 | #include "s_conf.h" | |
42 | #include "s_newconf.h" | |
43 | #include "s_serv.h" | |
44 | #include "hash.h" | |
45 | #include "msg.h" | |
46 | #include "parse.h" | |
47 | #include "modules.h" | |
48 | #include "whowas.h" | |
49 | #include "monitor.h" | |
50 | #include "supported.h" | |
51 | ||
52 | static int _modinit(void); | |
53 | static void _moddeinit(void); | |
54 | ||
55 | static void mark_services(void); | |
56 | static void unmark_services(void); | |
57 | ||
58 | static int me_su(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
59 | static int me_login(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
60 | static int me_rsfnc(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
61 | static int me_nickdelay(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
62 | ||
63 | static void h_svc_server_introduced(hook_data_client *); | |
64 | static void h_svc_whois(hook_data_client *); | |
65 | static void h_svc_stats(hook_data_int *); | |
66 | static void h_svc_conf_read_start(void *); | |
67 | static void h_svc_conf_read_end(void *); | |
68 | ||
69 | struct Message su_msgtab = { | |
70 | "SU", 0, 0, 0, 0, | |
71 | {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_su, 2}, mg_ignore} | |
72 | }; | |
73 | struct Message login_msgtab = { | |
74 | "LOGIN", 0, 0, 0, 0, | |
75 | {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_login, 2}, mg_ignore} | |
76 | }; | |
77 | struct Message rsfnc_msgtab = { | |
78 | "RSFNC", 0, 0, 0, 0, | |
79 | {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_rsfnc, 4}, mg_ignore} | |
80 | }; | |
81 | struct Message nickdelay_msgtab = { | |
82 | "NICKDELAY", 0, 0, 0, 0, | |
83 | {mg_unreg, mg_ignore, mg_ignore, mg_ignore, {me_nickdelay, 3}, mg_ignore} | |
84 | }; | |
85 | ||
86 | mapi_clist_av1 services_clist[] = { | |
87 | &su_msgtab, &login_msgtab, &rsfnc_msgtab, &nickdelay_msgtab, NULL | |
88 | }; | |
89 | mapi_hfn_list_av1 services_hfnlist[] = { | |
90 | { "doing_stats", (hookfn) h_svc_stats }, | |
91 | { "doing_whois", (hookfn) h_svc_whois }, | |
92 | { "doing_whois_global", (hookfn) h_svc_whois }, | |
93 | { "server_introduced", (hookfn) h_svc_server_introduced }, | |
94 | { "conf_read_start", (hookfn) h_svc_conf_read_start }, | |
95 | { "conf_read_end", (hookfn) h_svc_conf_read_end }, | |
96 | { NULL, NULL } | |
97 | }; | |
98 | ||
99 | DECLARE_MODULE_AV1(services, _modinit, _moddeinit, services_clist, NULL, services_hfnlist, "$Revision: 1907 $"); | |
100 | ||
101 | static int | |
102 | _modinit(void) | |
103 | { | |
104 | mark_services(); | |
105 | add_isupport("FNC", isupport_string, ""); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static void | |
110 | _moddeinit(void) | |
111 | { | |
112 | delete_isupport("FNC"); | |
113 | unmark_services(); | |
114 | } | |
115 | ||
116 | static int | |
117 | me_su(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, | |
118 | int parc, const char *parv[]) | |
119 | { | |
120 | struct Client *target_p; | |
121 | ||
122 | if(!(source_p->flags & FLAGS_SERVICE)) | |
123 | { | |
124 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
125 | "Non-service server %s attempting to execute services-only command SU", source_p->name); | |
126 | return 0; | |
127 | } | |
128 | ||
129 | if((target_p = find_client(parv[1])) == NULL) | |
130 | return 0; | |
131 | ||
132 | if(!target_p->user) | |
133 | return 0; | |
134 | ||
135 | if(EmptyString(parv[2])) | |
136 | target_p->user->suser[0] = '\0'; | |
137 | else | |
138 | rb_strlcpy(target_p->user->suser, parv[2], sizeof(target_p->user->suser)); | |
139 | ||
140 | sendto_common_channels_local_butone(target_p, CLICAP_ACCOUNT_NOTIFY, NOCAPS, ":%s!%s@%s ACCOUNT %s", | |
141 | target_p->name, target_p->username, target_p->host, | |
142 | EmptyString(target_p->user->suser) ? "*" : target_p->user->suser); | |
143 | ||
144 | invalidate_bancache_user(target_p); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static int | |
150 | me_login(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, | |
151 | int parc, const char *parv[]) | |
152 | { | |
153 | if(!IsPerson(source_p)) | |
154 | return 0; | |
155 | ||
156 | rb_strlcpy(source_p->user->suser, parv[1], sizeof(source_p->user->suser)); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static int | |
161 | me_rsfnc(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, | |
162 | int parc, const char *parv[]) | |
163 | { | |
164 | struct Client *target_p; | |
165 | struct Client *exist_p; | |
166 | time_t newts, curts; | |
167 | char note[NICKLEN + 10]; | |
168 | ||
169 | if(!(source_p->flags & FLAGS_SERVICE)) | |
170 | { | |
171 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
172 | "Non-service server %s attempting to execute services-only command RSFNC", source_p->name); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | if((target_p = find_person(parv[1])) == NULL) | |
177 | return 0; | |
178 | ||
179 | if(!MyClient(target_p)) | |
180 | return 0; | |
181 | ||
182 | if(!clean_nick(parv[2], 0) || IsDigit(parv[2][0])) | |
183 | return 0; | |
184 | ||
185 | curts = atol(parv[4]); | |
186 | ||
187 | /* if tsinfo is different from what it was when services issued the | |
188 | * RSFNC, then we ignore it. This can happen when a client changes | |
189 | * nicknames before the RSFNC arrives.. --anfl | |
190 | */ | |
191 | if(target_p->tsinfo != curts) | |
192 | return 0; | |
193 | ||
194 | if((exist_p = find_named_client(parv[2]))) | |
195 | { | |
196 | char buf[BUFSIZE]; | |
197 | ||
198 | /* this would be one hell of a race condition to trigger | |
199 | * this one given the tsinfo check above, but its here for | |
200 | * safety --anfl | |
201 | */ | |
202 | if(target_p == exist_p) | |
203 | goto doit; | |
204 | ||
205 | if(MyClient(exist_p)) | |
206 | sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)", | |
207 | me.name, exist_p->name); | |
208 | ||
209 | exist_p->flags |= FLAGS_KILLED; | |
210 | /* Do not send kills to servers for unknowns -- jilles */ | |
211 | if(IsClient(exist_p)) | |
212 | { | |
213 | kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)", | |
214 | me.name); | |
215 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
216 | "Nick collision due to services forced nick change on %s", | |
217 | parv[2]); | |
218 | } | |
219 | ||
220 | snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))", | |
221 | me.name); | |
222 | exit_client(NULL, exist_p, &me, buf); | |
223 | } | |
224 | ||
225 | doit: | |
226 | newts = atol(parv[3]); | |
227 | ||
228 | /* timestamp is older than 15mins, ignore it */ | |
229 | if(newts < (rb_current_time() - 900)) | |
230 | newts = rb_current_time() - 900; | |
231 | ||
232 | target_p->tsinfo = newts; | |
233 | ||
234 | monitor_signoff(target_p); | |
235 | ||
236 | invalidate_bancache_user(target_p); | |
237 | ||
238 | sendto_realops_snomask(SNO_NCHANGE, L_ALL, | |
239 | "Nick change: From %s to %s [%s@%s]", | |
240 | target_p->name, parv[2], target_p->username, | |
241 | target_p->host); | |
242 | ||
243 | sendto_common_channels_local(target_p, NOCAPS, NOCAPS, ":%s!%s@%s NICK :%s", | |
244 | target_p->name, target_p->username, | |
245 | target_p->host, parv[2]); | |
246 | ||
247 | whowas_add_history(target_p, 1); | |
248 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld", | |
249 | use_id(target_p), parv[2], (long) target_p->tsinfo); | |
250 | ||
251 | del_from_client_hash(target_p->name, target_p); | |
252 | rb_strlcpy(target_p->name, parv[2], NICKLEN); | |
253 | add_to_client_hash(target_p->name, target_p); | |
254 | ||
255 | monitor_signon(target_p); | |
256 | ||
257 | del_all_accepts(target_p); | |
258 | ||
259 | snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name); | |
260 | rb_note(target_p->localClient->F, note); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | /* | |
265 | ** me_nickdelay | |
266 | ** parv[1] = duration in seconds (0 to remove) | |
267 | ** parv[2] = nick | |
268 | */ | |
269 | static int | |
270 | me_nickdelay(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
271 | { | |
272 | int duration; | |
273 | struct nd_entry *nd; | |
274 | ||
275 | if(!(source_p->flags & FLAGS_SERVICE)) | |
276 | { | |
277 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
278 | "Non-service server %s attempting to execute services-only command NICKDELAY", source_p->name); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | duration = atoi(parv[1]); | |
283 | if (duration <= 0) | |
284 | { | |
285 | nd = irc_dictionary_retrieve(nd_dict, parv[2]); | |
286 | if (nd != NULL) | |
287 | free_nd_entry(nd); | |
288 | } | |
289 | else | |
290 | { | |
291 | if (duration > 86400) | |
292 | duration = 86400; | |
293 | add_nd_entry(parv[2]); | |
294 | nd = irc_dictionary_retrieve(nd_dict, parv[2]); | |
295 | if (nd != NULL) | |
296 | nd->expire = rb_current_time() + duration; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static void | |
303 | h_svc_server_introduced(hook_data_client *hdata) | |
304 | { | |
305 | rb_dlink_node *ptr; | |
306 | ||
307 | RB_DLINK_FOREACH(ptr, service_list.head) | |
308 | { | |
309 | if(!irccmp((const char *) ptr->data, hdata->target->name)) | |
310 | { | |
311 | hdata->target->flags |= FLAGS_SERVICE; | |
312 | return; | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
317 | static void | |
318 | h_svc_whois(hook_data_client *data) | |
319 | { | |
320 | char *p = data->target->user->suser; | |
321 | if(!EmptyString(p)) | |
322 | { | |
323 | /* Try to strip off any leading digits as this may be used to | |
324 | * store both an ID number and an account name in one field. | |
325 | * If only digits are present, leave as is. | |
326 | */ | |
327 | while(IsDigit(*p)) | |
328 | p++; | |
329 | if(*p == '\0') | |
330 | p = data->target->user->suser; | |
331 | ||
332 | sendto_one_numeric(data->client, RPL_WHOISLOGGEDIN, | |
333 | form_str(RPL_WHOISLOGGEDIN), | |
334 | data->target->name, p); | |
335 | } | |
336 | } | |
337 | ||
338 | static void | |
339 | h_svc_stats(hook_data_int *data) | |
340 | { | |
341 | char statchar = (char) data->arg2; | |
342 | rb_dlink_node *ptr; | |
343 | ||
344 | if (statchar == 'U' && IsOper(data->client)) | |
345 | { | |
346 | RB_DLINK_FOREACH(ptr, service_list.head) | |
347 | { | |
348 | sendto_one_numeric(data->client, RPL_STATSULINE, | |
349 | form_str(RPL_STATSULINE), | |
350 | (const char *)ptr->data, "*", "*", "s"); | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | static void | |
356 | h_svc_conf_read_start(void *dummy) | |
357 | { | |
358 | unmark_services(); | |
359 | } | |
360 | ||
361 | static void | |
362 | unmark_services(void) | |
363 | { | |
364 | struct Client *target_p; | |
365 | rb_dlink_node *ptr; | |
366 | ||
367 | RB_DLINK_FOREACH(ptr, global_serv_list.head) | |
368 | { | |
369 | target_p = ptr->data; | |
370 | ||
371 | target_p->flags &= ~FLAGS_SERVICE; | |
372 | } | |
373 | } | |
374 | ||
375 | static void | |
376 | h_svc_conf_read_end(void *dummy) | |
377 | { | |
378 | mark_services(); | |
379 | } | |
380 | ||
381 | static void | |
382 | mark_services(void) | |
383 | { | |
384 | struct Client *target_p; | |
385 | rb_dlink_node *ptr; | |
386 | ||
387 | RB_DLINK_FOREACH(ptr, service_list.head) | |
388 | { | |
389 | target_p = find_server(NULL, (const char *)ptr->data); | |
390 | ||
391 | if (target_p) | |
392 | target_p->flags |= FLAGS_SERVICE; | |
393 | } | |
394 | } |