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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_whois.c: Shows who a user is. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | */ | |
24 | ||
25 | #include "stdinc.h" | |
26 | #include "client.h" | |
27 | #include "hash.h" | |
28 | #include "channel.h" | |
29 | #include "hash.h" | |
30 | #include "ircd.h" | |
31 | #include "numeric.h" | |
32 | #include "s_conf.h" | |
33 | #include "s_serv.h" | |
34 | #include "send.h" | |
35 | #include "match.h" | |
36 | #include "s_conf.h" | |
37 | #include "logger.h" | |
38 | #include "msg.h" | |
39 | #include "parse.h" | |
40 | #include "modules.h" | |
41 | #include "hook.h" | |
42 | #include "s_newconf.h" | |
43 | #include "ipv4_from_ipv6.h" | |
44 | #include "ratelimit.h" | |
45 | #include "s_assert.h" | |
46 | ||
47 | static const char whois_desc[] = | |
48 | "Provides the WHOIS command to display information about a user"; | |
49 | ||
50 | static void do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]); | |
51 | static void single_whois(struct Client *source_p, struct Client *target_p, int operspy); | |
52 | ||
53 | static void m_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
54 | static void ms_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
55 | ||
56 | struct Message whois_msgtab = { | |
57 | "WHOIS", 0, 0, 0, 0, | |
58 | {mg_unreg, {m_whois, 2}, {ms_whois, 2}, mg_ignore, mg_ignore, {m_whois, 2}} | |
59 | }; | |
60 | ||
61 | int doing_whois_hook; | |
62 | int doing_whois_global_hook; | |
63 | int doing_whois_channel_visibility_hook; | |
64 | ||
65 | mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL }; | |
66 | mapi_hlist_av1 whois_hlist[] = { | |
67 | { "doing_whois", &doing_whois_hook }, | |
68 | { "doing_whois_global", &doing_whois_global_hook }, | |
69 | { "doing_whois_channel_visibility", &doing_whois_channel_visibility_hook }, | |
70 | { NULL, NULL } | |
71 | }; | |
72 | ||
73 | DECLARE_MODULE_AV2(whois, NULL, NULL, whois_clist, whois_hlist, NULL, NULL, NULL, whois_desc); | |
74 | ||
75 | /* | |
76 | * m_whois | |
77 | * parv[1] = nickname masklist | |
78 | */ | |
79 | static void | |
80 | m_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
81 | { | |
82 | static time_t last_used = 0; | |
83 | ||
84 | if(parc > 2) | |
85 | { | |
86 | if(EmptyString(parv[2])) | |
87 | { | |
88 | sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), | |
89 | me.name, source_p->name); | |
90 | return; | |
91 | } | |
92 | ||
93 | if(!IsOper(source_p)) | |
94 | { | |
95 | /* seeing as this is going across servers, we should limit it */ | |
96 | if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time() || !ratelimit_client(source_p, 2)) | |
97 | { | |
98 | sendto_one(source_p, form_str(RPL_LOAD2HI), | |
99 | me.name, source_p->name, "WHOIS"); | |
100 | sendto_one_numeric(source_p, RPL_ENDOFWHOIS, | |
101 | form_str(RPL_ENDOFWHOIS), parv[2]); | |
102 | return; | |
103 | } | |
104 | else | |
105 | last_used = rb_current_time(); | |
106 | } | |
107 | ||
108 | if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) != | |
109 | HUNTED_ISME) | |
110 | return; | |
111 | ||
112 | parv[1] = parv[2]; | |
113 | ||
114 | } | |
115 | do_whois(client_p, source_p, parc, parv); | |
116 | } | |
117 | ||
118 | /* | |
119 | * ms_whois | |
120 | * parv[1] = server to reply | |
121 | * parv[2] = nickname to whois | |
122 | */ | |
123 | static void | |
124 | ms_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
125 | { | |
126 | struct Client *target_p; | |
127 | ||
128 | /* note: early versions of ratbox allowed users to issue a remote | |
129 | * whois with a blank parv[2], so we cannot treat it as a protocol | |
130 | * violation. --anfl | |
131 | */ | |
132 | if(parc < 3 || EmptyString(parv[2])) | |
133 | { | |
134 | sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), | |
135 | me.name, source_p->name); | |
136 | return; | |
137 | } | |
138 | ||
139 | /* check if parv[1] exists */ | |
140 | if((target_p = find_client(parv[1])) == NULL) | |
141 | { | |
142 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, | |
143 | form_str(ERR_NOSUCHSERVER), | |
144 | IsDigit(parv[1][0]) ? "*" : parv[1]); | |
145 | return; | |
146 | } | |
147 | ||
148 | /* if parv[1] isnt my client, or me, someone else is supposed | |
149 | * to be handling the request.. so send it to them | |
150 | */ | |
151 | if(!MyClient(target_p) && !IsMe(target_p)) | |
152 | { | |
153 | sendto_one(target_p, ":%s WHOIS %s :%s", | |
154 | get_id(source_p, target_p), | |
155 | get_id(target_p, target_p), parv[2]); | |
156 | return; | |
157 | } | |
158 | ||
159 | /* ok, the target is either us, or a client on our server, so perform the whois | |
160 | * but first, parv[1] == server to perform the whois on, parv[2] == person | |
161 | * to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_ | |
162 | */ | |
163 | parv[1] = parv[2]; | |
164 | do_whois(client_p, source_p, parc, parv); | |
165 | } | |
166 | ||
167 | /* do_whois | |
168 | * | |
169 | * inputs - pointer to | |
170 | * output - | |
171 | * side effects - | |
172 | */ | |
173 | static void | |
174 | do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
175 | { | |
176 | struct Client *target_p; | |
177 | char *nick; | |
178 | char *p = NULL; | |
179 | int operspy = 0; | |
180 | ||
181 | nick = LOCAL_COPY(parv[1]); | |
182 | if((p = strchr(nick, ','))) | |
183 | *p = '\0'; | |
184 | ||
185 | if(IsOperSpy(source_p) && *nick == '!') | |
186 | { | |
187 | operspy = 1; | |
188 | nick++; | |
189 | } | |
190 | ||
191 | target_p = find_named_person(nick); | |
192 | if(target_p != NULL) | |
193 | { | |
194 | if(operspy) | |
195 | { | |
196 | char buffer[BUFSIZE]; | |
197 | ||
198 | snprintf(buffer, sizeof(buffer), "%s!%s@%s %s", | |
199 | target_p->name, target_p->username, | |
200 | target_p->host, target_p->servptr->name); | |
201 | report_operspy(source_p, "WHOIS", buffer); | |
202 | } | |
203 | ||
204 | single_whois(source_p, target_p, operspy); | |
205 | } | |
206 | else | |
207 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
208 | form_str(ERR_NOSUCHNICK), | |
209 | nick); | |
210 | ||
211 | sendto_one_numeric(source_p, RPL_ENDOFWHOIS, | |
212 | form_str(RPL_ENDOFWHOIS), parv[1]); | |
213 | } | |
214 | ||
215 | /* | |
216 | * single_whois() | |
217 | * | |
218 | * Inputs - source_p client to report to | |
219 | * - target_p client to report on | |
220 | * Output - if found return 1 | |
221 | * Side Effects - do a single whois on given client | |
222 | * writing results to source_p | |
223 | */ | |
224 | static void | |
225 | single_whois(struct Client *source_p, struct Client *target_p, int operspy) | |
226 | { | |
227 | char buf[BUFSIZE]; | |
228 | rb_dlink_node *ptr; | |
229 | struct membership *msptr; | |
230 | struct Channel *chptr; | |
231 | int cur_len = 0; | |
232 | int mlen; | |
233 | char *t; | |
234 | int tlen; | |
235 | hook_data_client hdata; | |
236 | int extra_space = 0; | |
237 | #ifdef RB_IPV6 | |
238 | struct sockaddr_in ip4; | |
239 | #endif | |
240 | ||
241 | if(target_p->user == NULL) | |
242 | { | |
243 | s_assert(0); | |
244 | return; | |
245 | } | |
246 | ||
247 | sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER), | |
248 | target_p->name, target_p->username, | |
249 | target_p->host, target_p->info); | |
250 | ||
251 | cur_len = mlen = sprintf(buf, form_str(RPL_WHOISCHANNELS), | |
252 | get_id(&me, source_p), get_id(source_p, source_p), | |
253 | target_p->name); | |
254 | ||
255 | /* Make sure it won't overflow when sending it to the client | |
256 | * in full names; note that serverhiding may require more space | |
257 | * for a different server name (not done here) -- jilles | |
258 | */ | |
259 | if (!MyConnect(source_p)) | |
260 | { | |
261 | extra_space = strlen(source_p->name) - 9; | |
262 | if (extra_space < 0) | |
263 | extra_space = 0; | |
264 | extra_space += strlen(me.name) - 2; /* make sure >= 0 */ | |
265 | cur_len += extra_space; | |
266 | } | |
267 | ||
268 | t = buf + mlen; | |
269 | ||
270 | hdata.client = source_p; | |
271 | hdata.target = target_p; | |
272 | ||
273 | if (!IsService(target_p)) | |
274 | { | |
275 | RB_DLINK_FOREACH(ptr, target_p->user->channel.head) | |
276 | { | |
277 | msptr = ptr->data; | |
278 | chptr = msptr->chptr; | |
279 | ||
280 | hdata.chptr = chptr; | |
281 | ||
282 | hdata.approved = ShowChannel(source_p, chptr); | |
283 | call_hook(doing_whois_channel_visibility_hook, &hdata); | |
284 | ||
285 | if(hdata.approved || operspy) | |
286 | { | |
287 | if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5)) | |
288 | { | |
289 | sendto_one(source_p, "%s", buf); | |
290 | cur_len = mlen + extra_space; | |
291 | t = buf + mlen; | |
292 | } | |
293 | ||
294 | tlen = sprintf(t, "%s%s%s ", | |
295 | hdata.approved ? "" : "!", | |
296 | find_channel_status(msptr, 1), | |
297 | chptr->chname); | |
298 | t += tlen; | |
299 | cur_len += tlen; | |
300 | } | |
301 | } | |
302 | } | |
303 | ||
304 | if(cur_len > mlen + extra_space) | |
305 | sendto_one(source_p, "%s", buf); | |
306 | ||
307 | sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER), | |
308 | target_p->name, target_p->servptr->name, | |
309 | target_p->servptr->info); | |
310 | ||
311 | if(target_p->user->away) | |
312 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), | |
313 | target_p->name, target_p->user->away); | |
314 | ||
315 | if(IsOper(target_p) && (!ConfigFileEntry.hide_opers_in_whois || IsOper(source_p))) | |
316 | { | |
317 | sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR), | |
318 | target_p->name, | |
319 | IsService(target_p) ? ConfigFileEntry.servicestring : | |
320 | (IsAdmin(target_p) ? GlobalSetOptions.adminstring : | |
321 | GlobalSetOptions.operstring)); | |
322 | } | |
323 | ||
324 | if(MyClient(target_p) && !EmptyString(target_p->localClient->opername) && IsOper(source_p)) | |
325 | { | |
326 | char buf[512]; | |
327 | snprintf(buf, sizeof(buf), "is opered as %s, privset %s", | |
328 | target_p->localClient->opername, target_p->localClient->privset->name); | |
329 | sendto_one_numeric(source_p, RPL_WHOISSPECIAL, form_str(RPL_WHOISSPECIAL), | |
330 | target_p->name, buf); | |
331 | } | |
332 | ||
333 | if(IsSSLClient(target_p)) | |
334 | { | |
335 | char cbuf[256] = "is using a secure connection"; | |
336 | ||
337 | if (MyClient(target_p) && target_p->localClient->cipher_string != NULL) | |
338 | rb_snprintf_append(cbuf, sizeof(cbuf), " [%s]", target_p->localClient->cipher_string); | |
339 | ||
340 | sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE), | |
341 | target_p->name, cbuf); | |
342 | if((source_p == target_p || IsOper(source_p)) && | |
343 | target_p->certfp != NULL) | |
344 | sendto_one_numeric(source_p, RPL_WHOISCERTFP, | |
345 | form_str(RPL_WHOISCERTFP), | |
346 | target_p->name, target_p->certfp); | |
347 | } | |
348 | ||
349 | if(MyClient(target_p)) | |
350 | { | |
351 | if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p)) | |
352 | { | |
353 | /* trick here: show a nonoper their own IP if | |
354 | * dynamic spoofed but not if auth{} spoofed | |
355 | * -- jilles */ | |
356 | ClearDynSpoof(target_p); | |
357 | sendto_one_numeric(source_p, RPL_WHOISHOST, | |
358 | form_str(RPL_WHOISHOST), | |
359 | target_p->name, target_p->orighost, | |
360 | show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255"); | |
361 | SetDynSpoof(target_p); | |
362 | } | |
363 | else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p)) | |
364 | sendto_one_numeric(source_p, RPL_WHOISACTUALLY, | |
365 | form_str(RPL_WHOISACTUALLY), | |
366 | target_p->name, target_p->sockhost); | |
367 | ||
368 | #ifdef RB_IPV6 | |
369 | if (GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET6 && | |
370 | (show_ip(source_p, target_p) || | |
371 | (source_p == target_p && !IsIPSpoof(target_p))) && | |
372 | ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4)) | |
373 | { | |
374 | rb_inet_ntop_sock((struct sockaddr *)&ip4, | |
375 | buf, sizeof buf); | |
376 | sendto_one_numeric(source_p, RPL_WHOISTEXT, | |
377 | "%s :Underlying IPv4 is %s", | |
378 | target_p->name, buf); | |
379 | } | |
380 | #endif /* RB_IPV6 */ | |
381 | ||
382 | sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE), | |
383 | target_p->name, | |
384 | (long)(rb_current_time() - target_p->localClient->last), | |
385 | (unsigned long)target_p->localClient->firsttime); | |
386 | } | |
387 | else | |
388 | { | |
389 | if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p)) | |
390 | { | |
391 | ClearDynSpoof(target_p); | |
392 | sendto_one_numeric(source_p, RPL_WHOISHOST, | |
393 | form_str(RPL_WHOISHOST), | |
394 | target_p->name, target_p->orighost, | |
395 | show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255"); | |
396 | SetDynSpoof(target_p); | |
397 | } | |
398 | else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) && | |
399 | !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")) | |
400 | { | |
401 | sendto_one_numeric(source_p, RPL_WHOISACTUALLY, | |
402 | form_str(RPL_WHOISACTUALLY), | |
403 | target_p->name, target_p->sockhost); | |
404 | ||
405 | } | |
406 | } | |
407 | ||
408 | /* doing_whois_hook must only be called for local clients, | |
409 | * doing_whois_global_hook must only be called for local targets | |
410 | */ | |
411 | /* it is important that these are called *before* RPL_ENDOFWHOIS is | |
412 | * sent, services compatibility code depends on it. --anfl | |
413 | */ | |
414 | if(MyClient(source_p)) | |
415 | call_hook(doing_whois_hook, &hdata); | |
416 | else | |
417 | call_hook(doing_whois_global_hook, &hdata); | |
418 | } |