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212380e3 AC |
1 | /* modules/m_signon.c |
2 | * Copyright (C) 2006 Michael Tharp <gxti@partiallystapled.com> | |
3 | * Copyright (C) 2006 charybdis 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_signon.c 1192 2006-04-21 16:21:02Z jilles $ | |
30 | */ | |
31 | ||
32 | #include "stdinc.h" | |
33 | ||
212380e3 AC |
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" | |
212380e3 AC |
41 | #include "s_conf.h" |
42 | #include "s_serv.h" | |
43 | #include "hash.h" | |
44 | #include "msg.h" | |
45 | #include "parse.h" | |
46 | #include "modules.h" | |
212380e3 AC |
47 | #include "whowas.h" |
48 | #include "monitor.h" | |
49 | #include "s_stats.h" | |
50 | #include "snomask.h" | |
4562c604 | 51 | #include "match.h" |
212380e3 AC |
52 | #include "s_user.h" |
53 | ||
54 | static int me_svslogin(struct Client *, struct Client *, int, const char **); | |
55 | static int ms_signon(struct Client *, struct Client *, int, const char **); | |
56 | ||
57 | static void send_signon(struct Client *, struct Client *, const char *, const char *, const char *, unsigned int, const char *); | |
58 | ||
59 | struct Message svslogin_msgtab = { | |
60 | "SVSLOGIN", 0, 0, 0, MFLG_SLOW, | |
61 | {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_svslogin, 6}, mg_ignore} | |
62 | }; | |
63 | struct Message signon_msgtab = { | |
64 | "SIGNON", 0, 0, 0, MFLG_SLOW, | |
65 | {mg_ignore, mg_ignore, {ms_signon, 6}, mg_ignore, mg_ignore, mg_ignore} | |
66 | }; | |
67 | ||
68 | mapi_clist_av1 signon_clist[] = { | |
69 | &svslogin_msgtab, &signon_msgtab, NULL | |
70 | }; | |
71 | ||
72 | DECLARE_MODULE_AV1(signon, NULL, NULL, signon_clist, NULL, NULL, "$Revision: 1192 $"); | |
73 | ||
74 | #define NICK_VALID 1 | |
75 | #define USER_VALID 2 | |
76 | #define HOST_VALID 4 | |
77 | ||
78 | static int | |
79 | clean_nick(const char *nick) | |
80 | { | |
81 | int len = 0; | |
82 | ||
83 | if(*nick == '-') | |
84 | return 0; | |
85 | ||
86 | /* This is used to check logins, which are often | |
87 | * numeric. Don't check for leading digits, if | |
88 | * services wants to set someone's nick to something | |
89 | * starting with a number, let it try. | |
90 | * --gxti | |
91 | */ | |
92 | ||
93 | for (; *nick; nick++) | |
94 | { | |
95 | len++; | |
96 | if(!IsNickChar(*nick)) | |
97 | return 0; | |
98 | } | |
99 | ||
100 | /* nicklen is +1 */ | |
101 | if(len >= NICKLEN) | |
102 | return 0; | |
103 | ||
104 | return 1; | |
105 | } | |
106 | ||
107 | static int | |
108 | clean_username(const char *username) | |
109 | { | |
110 | int len = 0; | |
111 | ||
112 | for (; *username; username++) | |
113 | { | |
114 | len++; | |
115 | ||
116 | if(!IsUserChar(*username)) | |
117 | return 0; | |
118 | } | |
119 | ||
120 | if(len > USERLEN) | |
121 | return 0; | |
122 | ||
123 | return 1; | |
124 | } | |
125 | ||
126 | static int | |
127 | clean_host(const char *host) | |
128 | { | |
129 | int len = 0; | |
130 | ||
131 | for (; *host; host++) | |
132 | { | |
133 | len++; | |
134 | ||
135 | if(!IsHostChar(*host)) | |
136 | return 0; | |
137 | } | |
138 | ||
139 | if(len > HOSTLEN) | |
140 | return 0; | |
141 | ||
142 | return 1; | |
143 | } | |
144 | ||
145 | static int | |
146 | me_svslogin(struct Client *client_p, struct Client *source_p, | |
147 | int parc, const char *parv[]) | |
148 | { | |
149 | struct Client *target_p, *exist_p; | |
150 | char nick[NICKLEN+1], login[NICKLEN+1]; | |
151 | char user[USERLEN+1], host[HOSTLEN+1]; | |
152 | int valid = 0; | |
153 | ||
154 | if(!(source_p->flags & FLAGS_SERVICE)) | |
ec57fe67 KB |
155 | { |
156 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
157 | "Non-service server %s attempting to execute services-only command SVSLOGIN", source_p->name); | |
212380e3 | 158 | return 0; |
ec57fe67 | 159 | } |
212380e3 AC |
160 | |
161 | if((target_p = find_client(parv[1])) == NULL) | |
162 | return 0; | |
163 | ||
164 | if(!MyClient(target_p) && !IsUnknown(target_p)) | |
165 | return 0; | |
166 | ||
167 | if(clean_nick(parv[2])) | |
168 | { | |
f427c8b0 | 169 | rb_strlcpy(nick, parv[2], NICKLEN + 1); |
212380e3 AC |
170 | valid |= NICK_VALID; |
171 | } | |
172 | else if(*target_p->name) | |
f427c8b0 | 173 | rb_strlcpy(nick, target_p->name, NICKLEN + 1); |
212380e3 AC |
174 | else |
175 | strcpy(nick, "*"); | |
176 | ||
177 | if(clean_username(parv[3])) | |
178 | { | |
f427c8b0 | 179 | rb_strlcpy(user, parv[3], USERLEN + 1); |
212380e3 AC |
180 | valid |= USER_VALID; |
181 | } | |
182 | else | |
f427c8b0 | 183 | rb_strlcpy(user, target_p->username, USERLEN + 1); |
212380e3 AC |
184 | |
185 | if(clean_host(parv[4])) | |
186 | { | |
f427c8b0 | 187 | rb_strlcpy(host, parv[4], HOSTLEN + 1); |
212380e3 AC |
188 | valid |= HOST_VALID; |
189 | } | |
190 | else | |
f427c8b0 | 191 | rb_strlcpy(host, target_p->host, HOSTLEN + 1); |
212380e3 AC |
192 | |
193 | if(*parv[5] == '*') | |
194 | { | |
195 | if(target_p->user) | |
f427c8b0 | 196 | rb_strlcpy(login, target_p->user->suser, NICKLEN + 1); |
212380e3 AC |
197 | else |
198 | login[0] = '\0'; | |
199 | } | |
200 | else if(!strcmp(parv[5], "0")) | |
201 | login[0] = '\0'; | |
202 | else | |
f427c8b0 | 203 | rb_strlcpy(login, parv[5], NICKLEN + 1); |
212380e3 AC |
204 | |
205 | /* Login (mostly) follows nick rules. */ | |
206 | if(*login && !clean_nick(login)) | |
207 | return 0; | |
208 | ||
209 | if((exist_p = find_person(nick)) && target_p != exist_p) | |
210 | { | |
211 | char buf[BUFSIZE]; | |
212 | ||
213 | if(MyClient(exist_p)) | |
214 | sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)", | |
215 | me.name, exist_p->name); | |
216 | ||
217 | exist_p->flags |= FLAGS_KILLED; | |
218 | kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)", | |
219 | me.name); | |
45ed8835 JT |
220 | sendto_realops_snomask(SNO_SKILL, L_ALL, |
221 | "Nick collision due to SVSLOGIN on %s", | |
222 | nick); | |
212380e3 | 223 | |
c2f73e5d | 224 | rb_snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))", |
212380e3 AC |
225 | me.name); |
226 | exit_client(NULL, exist_p, &me, buf); | |
227 | }else if((exist_p = find_client(nick)) && IsUnknown(exist_p) && exist_p != target_p) { | |
228 | exit_client(NULL, exist_p, &me, "Overridden"); | |
229 | } | |
230 | ||
231 | if(*login) | |
232 | { | |
233 | /* Strip leading digits, unless it's purely numeric. */ | |
234 | const char *p = login; | |
235 | while(IsDigit(*p)) | |
236 | p++; | |
237 | if(!*p) | |
238 | p = login; | |
239 | ||
240 | sendto_one(target_p, form_str(RPL_LOGGEDIN), me.name, EmptyString(target_p->name) ? "*" : target_p->name, | |
241 | nick, user, host, p, p); | |
242 | } | |
243 | else | |
244 | sendto_one(target_p, form_str(RPL_LOGGEDOUT), me.name, EmptyString(target_p->name) ? "*" : target_p->name, | |
245 | nick, user, host); | |
246 | ||
247 | if(IsUnknown(target_p)) | |
248 | { | |
249 | struct User *user_p = make_user(target_p); | |
250 | ||
251 | if(valid & NICK_VALID) | |
252 | strcpy(target_p->preClient->spoofnick, nick); | |
253 | ||
254 | if(valid & USER_VALID) | |
255 | strcpy(target_p->preClient->spoofuser, user); | |
256 | ||
257 | if(valid & HOST_VALID) | |
258 | strcpy(target_p->preClient->spoofhost, host); | |
259 | ||
f427c8b0 | 260 | rb_strlcpy(user_p->suser, login, NICKLEN + 1); |
212380e3 AC |
261 | } |
262 | else | |
263 | { | |
cf9a6b75 AC |
264 | char note[NICKLEN + 10]; |
265 | ||
e3354945 | 266 | send_signon(NULL, target_p, nick, user, host, rb_current_time(), login); |
cf9a6b75 AC |
267 | |
268 | rb_snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name); | |
269 | rb_note(target_p->localClient->F, note); | |
212380e3 AC |
270 | } |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static int | |
276 | ms_signon(struct Client *client_p, struct Client *source_p, | |
277 | int parc, const char *parv[]) | |
278 | { | |
279 | struct Client *target_p; | |
280 | int newts, sameuser; | |
281 | char login[NICKLEN+1]; | |
282 | ||
283 | if(!clean_nick(parv[1])) | |
284 | { | |
47adde3d | 285 | ServerStats.is_kill++; |
212380e3 AC |
286 | sendto_realops_snomask(SNO_DEBUG, L_ALL, |
287 | "Bad Nick from SIGNON: %s From: %s(via %s)", | |
288 | parv[1], source_p->servptr->name, client_p->name); | |
289 | /* if source_p has an id, kill_client_serv_butone() will | |
290 | * send a kill to client_p, otherwise do it here */ | |
291 | if (!has_id(source_p)) | |
292 | sendto_one(client_p, ":%s KILL %s :%s (Bad nickname from SIGNON)", | |
293 | get_id(&me, client_p), parv[1], me.name); | |
294 | kill_client_serv_butone(client_p, source_p, "%s (Bad nickname from SIGNON)", | |
295 | me.name); | |
296 | source_p->flags |= FLAGS_KILLED; | |
297 | exit_client(NULL, source_p, &me, "Bad nickname from SIGNON"); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | if(!clean_username(parv[2]) || !clean_host(parv[3])) | |
302 | { | |
47adde3d | 303 | ServerStats.is_kill++; |
212380e3 AC |
304 | sendto_realops_snomask(SNO_DEBUG, L_ALL, |
305 | "Bad user@host from SIGNON: %s@%s From: %s(via %s)", | |
306 | parv[2], parv[3], source_p->servptr->name, client_p->name); | |
307 | /* if source_p has an id, kill_client_serv_butone() will | |
308 | * send a kill to client_p, otherwise do it here */ | |
309 | if (!has_id(source_p)) | |
310 | sendto_one(client_p, ":%s KILL %s :%s (Bad user@host from SIGNON)", | |
311 | get_id(&me, client_p), parv[1], me.name); | |
312 | kill_client_serv_butone(client_p, source_p, "%s (Bad user@host from SIGNON)", | |
313 | me.name); | |
314 | source_p->flags |= FLAGS_KILLED; | |
315 | exit_client(NULL, source_p, &me, "Bad user@host from SIGNON"); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | newts = atol(parv[4]); | |
320 | ||
321 | if(!strcmp(parv[5], "0")) | |
322 | login[0] = '\0'; | |
323 | else if(*parv[5] != '*') | |
324 | { | |
325 | if (clean_nick(parv[5])) | |
f427c8b0 | 326 | rb_strlcpy(login, parv[5], NICKLEN + 1); |
212380e3 AC |
327 | else |
328 | return 0; | |
329 | } | |
330 | ||
331 | target_p = find_named_client(parv[1]); | |
332 | if(target_p != NULL && target_p != source_p) | |
333 | { | |
334 | /* In case of collision, follow NICK rules. */ | |
335 | /* XXX this is duplicated code and does not do SAVE */ | |
336 | if(IsUnknown(target_p)) | |
337 | exit_client(NULL, target_p, &me, "Overridden"); | |
338 | else | |
339 | { | |
340 | if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo) || !source_p->user) | |
341 | { | |
342 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
343 | "Nick change collision from SIGNON from %s to %s(%s <- %s)(both killed)", | |
344 | source_p->name, target_p->name, target_p->from->name, | |
345 | client_p->name); | |
346 | ||
47adde3d | 347 | ServerStats.is_kill++; |
212380e3 AC |
348 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, |
349 | form_str(ERR_NICKCOLLISION), target_p->name); | |
350 | ||
351 | kill_client_serv_butone(NULL, source_p, "%s (Nick change collision)", me.name); | |
352 | ||
47adde3d | 353 | ServerStats.is_kill++; |
212380e3 AC |
354 | |
355 | kill_client_serv_butone(NULL, target_p, "%s (Nick change collision)", me.name); | |
356 | ||
357 | target_p->flags |= FLAGS_KILLED; | |
358 | exit_client(NULL, target_p, &me, "Nick collision(new)"); | |
359 | source_p->flags |= FLAGS_KILLED; | |
360 | exit_client(client_p, source_p, &me, "Nick collision(old)"); | |
361 | return 0; | |
362 | } | |
363 | else | |
364 | { | |
365 | sameuser = !irccmp(target_p->username, source_p->username) && | |
366 | !irccmp(target_p->host, source_p->host); | |
367 | ||
368 | if((sameuser && newts < target_p->tsinfo) || | |
369 | (!sameuser && newts > target_p->tsinfo)) | |
370 | { | |
371 | if(sameuser) | |
372 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
373 | "Nick change collision from SIGNON from %s to %s(%s <- %s)(older killed)", | |
374 | source_p->name, target_p->name, | |
375 | target_p->from->name, client_p->name); | |
376 | else | |
377 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
378 | "Nick change collision from SIGNON from %s to %s(%s <- %s)(newer killed)", | |
379 | source_p->name, target_p->name, | |
380 | target_p->from->name, client_p->name); | |
381 | ||
47adde3d | 382 | ServerStats.is_kill++; |
212380e3 AC |
383 | |
384 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, | |
385 | form_str(ERR_NICKCOLLISION), target_p->name); | |
386 | ||
387 | /* kill the client issuing the nickchange */ | |
388 | kill_client_serv_butone(client_p, source_p, | |
389 | "%s (Nick change collision)", me.name); | |
390 | ||
391 | source_p->flags |= FLAGS_KILLED; | |
392 | ||
393 | if(sameuser) | |
394 | exit_client(client_p, source_p, &me, "Nick collision(old)"); | |
395 | else | |
396 | exit_client(client_p, source_p, &me, "Nick collision(new)"); | |
397 | return 0; | |
398 | } | |
399 | else | |
400 | { | |
401 | if(sameuser) | |
402 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
403 | "Nick collision from SIGNON on %s(%s <- %s)(older killed)", | |
404 | target_p->name, target_p->from->name, | |
405 | client_p->name); | |
406 | else | |
407 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
408 | "Nick collision from SIGNON on %s(%s <- %s)(newer killed)", | |
409 | target_p->name, target_p->from->name, | |
410 | client_p->name); | |
411 | ||
412 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, | |
413 | form_str(ERR_NICKCOLLISION), target_p->name); | |
414 | ||
415 | /* kill the client who existed before hand */ | |
416 | kill_client_serv_butone(client_p, target_p, | |
417 | "%s (Nick collision)", me.name); | |
418 | ||
47adde3d | 419 | ServerStats.is_kill++; |
212380e3 AC |
420 | |
421 | target_p->flags |= FLAGS_KILLED; | |
422 | (void) exit_client(client_p, target_p, &me, "Nick collision"); | |
423 | } | |
424 | } | |
425 | ||
426 | } | |
427 | } | |
428 | ||
429 | send_signon(client_p, source_p, parv[1], parv[2], parv[3], newts, login); | |
430 | return 0; | |
431 | } | |
432 | ||
433 | static void | |
434 | send_signon(struct Client *client_p, struct Client *target_p, | |
435 | const char *nick, const char *user, const char *host, | |
436 | unsigned int newts, const char *login) | |
437 | { | |
438 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s SIGNON %s %s %s %ld %s", | |
439 | use_id(target_p), nick, user, host, | |
440 | (long) target_p->tsinfo, *login ? login : "0"); | |
212380e3 AC |
441 | |
442 | strcpy(target_p->user->suser, login); | |
443 | ||
444 | change_nick_user_host(target_p, nick, user, host, newts, "Signing %s (%s)", *login ? "in" : "out", nick); | |
445 | } | |
446 |