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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 "common.h" | |
27 | #include "client.h" | |
28 | #include "hash.h" | |
29 | #include "channel.h" | |
30 | #include "hash.h" | |
31 | #include "ircd.h" | |
32 | #include "numeric.h" | |
33 | #include "s_conf.h" | |
34 | #include "s_serv.h" | |
35 | #include "send.h" | |
36 | #include "match.h" | |
37 | #include "s_conf.h" | |
38 | #include "logger.h" | |
39 | #include "msg.h" | |
40 | #include "parse.h" | |
41 | #include "modules.h" | |
42 | #include "hook.h" | |
43 | #include "s_newconf.h" | |
44 | #include "ipv4_from_ipv6.h" | |
45 | #include "ratelimit.h" | |
46 | #include "s_assert.h" | |
47 | ||
48 | static const char whois_desc[] = | |
49 | "Provides the WHOIS command to display information about a user"; | |
50 | ||
51 | static void do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]); | |
52 | static void single_whois(struct Client *source_p, struct Client *target_p, int operspy); | |
53 | ||
54 | static void m_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
55 | static void ms_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
56 | ||
57 | struct Message whois_msgtab = { | |
58 | "WHOIS", 0, 0, 0, 0, | |
59 | {mg_unreg, {m_whois, 2}, {ms_whois, 2}, mg_ignore, mg_ignore, {m_whois, 2}} | |
60 | }; | |
61 | ||
62 | int doing_whois_hook; | |
63 | int doing_whois_global_hook; | |
64 | int doing_whois_channel_visibility_hook; | |
65 | ||
66 | mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL }; | |
67 | mapi_hlist_av1 whois_hlist[] = { | |
68 | { "doing_whois", &doing_whois_hook }, | |
69 | { "doing_whois_global", &doing_whois_global_hook }, | |
70 | { "doing_whois_channel_visibility", &doing_whois_channel_visibility_hook }, | |
71 | { NULL, NULL } | |
72 | }; | |
73 | ||
74 | DECLARE_MODULE_AV2(whois, NULL, NULL, whois_clist, whois_hlist, NULL, NULL, NULL, whois_desc); | |
75 | ||
76 | /* | |
77 | * m_whois | |
78 | * parv[1] = nickname masklist | |
79 | */ | |
80 | static void | |
81 | m_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
82 | { | |
83 | static time_t last_used = 0; | |
84 | ||
85 | if(parc > 2) | |
86 | { | |
87 | if(EmptyString(parv[2])) | |
88 | { | |
89 | sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), | |
90 | me.name, source_p->name); | |
91 | return; | |
92 | } | |
93 | ||
94 | if(!IsOper(source_p)) | |
95 | { | |
96 | /* seeing as this is going across servers, we should limit it */ | |
97 | if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time() || !ratelimit_client(source_p, 2)) | |
98 | { | |
99 | sendto_one(source_p, form_str(RPL_LOAD2HI), | |
100 | me.name, source_p->name, "WHOIS"); | |
101 | sendto_one_numeric(source_p, RPL_ENDOFWHOIS, | |
102 | form_str(RPL_ENDOFWHOIS), parv[2]); | |
103 | return; | |
104 | } | |
105 | else | |
106 | last_used = rb_current_time(); | |
107 | } | |
108 | ||
109 | if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) != | |
110 | HUNTED_ISME) | |
111 | return; | |
112 | ||
113 | parv[1] = parv[2]; | |
114 | ||
115 | } | |
116 | do_whois(client_p, source_p, parc, parv); | |
117 | } | |
118 | ||
119 | /* | |
120 | * ms_whois | |
121 | * parv[1] = server to reply | |
122 | * parv[2] = nickname to whois | |
123 | */ | |
124 | static void | |
125 | ms_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
126 | { | |
127 | struct Client *target_p; | |
128 | ||
129 | /* note: early versions of ratbox allowed users to issue a remote | |
130 | * whois with a blank parv[2], so we cannot treat it as a protocol | |
131 | * violation. --anfl | |
132 | */ | |
133 | if(parc < 3 || EmptyString(parv[2])) | |
134 | { | |
135 | sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), | |
136 | me.name, source_p->name); | |
137 | return; | |
138 | } | |
139 | ||
140 | /* check if parv[1] exists */ | |
141 | if((target_p = find_client(parv[1])) == NULL) | |
142 | { | |
143 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, | |
144 | form_str(ERR_NOSUCHSERVER), | |
145 | IsDigit(parv[1][0]) ? "*" : parv[1]); | |
146 | return; | |
147 | } | |
148 | ||
149 | /* if parv[1] isnt my client, or me, someone else is supposed | |
150 | * to be handling the request.. so send it to them | |
151 | */ | |
152 | if(!MyClient(target_p) && !IsMe(target_p)) | |
153 | { | |
154 | sendto_one(target_p, ":%s WHOIS %s :%s", | |
155 | get_id(source_p, target_p), | |
156 | get_id(target_p, target_p), parv[2]); | |
157 | return; | |
158 | } | |
159 | ||
160 | /* ok, the target is either us, or a client on our server, so perform the whois | |
161 | * but first, parv[1] == server to perform the whois on, parv[2] == person | |
162 | * to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_ | |
163 | */ | |
164 | parv[1] = parv[2]; | |
165 | do_whois(client_p, source_p, parc, parv); | |
166 | } | |
167 | ||
168 | /* do_whois | |
169 | * | |
170 | * inputs - pointer to | |
171 | * output - | |
172 | * side effects - | |
173 | */ | |
174 | static void | |
175 | do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
176 | { | |
177 | struct Client *target_p; | |
178 | char *nick; | |
179 | char *p = NULL; | |
180 | int operspy = 0; | |
181 | ||
182 | nick = LOCAL_COPY(parv[1]); | |
183 | if((p = strchr(nick, ','))) | |
184 | *p = '\0'; | |
185 | ||
186 | if(IsOperSpy(source_p) && *nick == '!') | |
187 | { | |
188 | operspy = 1; | |
189 | nick++; | |
190 | } | |
191 | ||
192 | target_p = find_named_person(nick); | |
193 | if(target_p != NULL) | |
194 | { | |
195 | if(operspy) | |
196 | { | |
197 | char buffer[BUFSIZE]; | |
198 | ||
199 | snprintf(buffer, sizeof(buffer), "%s!%s@%s %s", | |
200 | target_p->name, target_p->username, | |
201 | target_p->host, target_p->servptr->name); | |
202 | report_operspy(source_p, "WHOIS", buffer); | |
203 | } | |
204 | ||
205 | single_whois(source_p, target_p, operspy); | |
206 | } | |
207 | else | |
208 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
209 | form_str(ERR_NOSUCHNICK), | |
210 | nick); | |
211 | ||
212 | sendto_one_numeric(source_p, RPL_ENDOFWHOIS, | |
213 | form_str(RPL_ENDOFWHOIS), parv[1]); | |
214 | } | |
215 | ||
216 | /* | |
217 | * single_whois() | |
218 | * | |
219 | * Inputs - source_p client to report to | |
220 | * - target_p client to report on | |
221 | * Output - if found return 1 | |
222 | * Side Effects - do a single whois on given client | |
223 | * writing results to source_p | |
224 | */ | |
225 | static void | |
226 | single_whois(struct Client *source_p, struct Client *target_p, int operspy) | |
227 | { | |
228 | char buf[BUFSIZE]; | |
229 | rb_dlink_node *ptr; | |
230 | struct membership *msptr; | |
231 | struct Channel *chptr; | |
232 | int cur_len = 0; | |
233 | int mlen; | |
234 | char *t; | |
235 | int tlen; | |
236 | hook_data_client hdata; | |
237 | int extra_space = 0; | |
238 | #ifdef RB_IPV6 | |
239 | struct sockaddr_in ip4; | |
240 | #endif | |
241 | ||
242 | if(target_p->user == NULL) | |
243 | { | |
244 | s_assert(0); | |
245 | return; | |
246 | } | |
247 | ||
248 | sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER), | |
249 | target_p->name, target_p->username, | |
250 | target_p->host, target_p->info); | |
251 | ||
252 | cur_len = mlen = sprintf(buf, form_str(RPL_WHOISCHANNELS), | |
253 | get_id(&me, source_p), get_id(source_p, source_p), | |
254 | target_p->name); | |
255 | ||
256 | /* Make sure it won't overflow when sending it to the client | |
257 | * in full names; note that serverhiding may require more space | |
258 | * for a different server name (not done here) -- jilles | |
259 | */ | |
260 | if (!MyConnect(source_p)) | |
261 | { | |
262 | extra_space = strlen(source_p->name) - 9; | |
263 | if (extra_space < 0) | |
264 | extra_space = 0; | |
265 | extra_space += strlen(me.name) - 2; /* make sure >= 0 */ | |
266 | cur_len += extra_space; | |
267 | } | |
268 | ||
269 | t = buf + mlen; | |
270 | ||
271 | hdata.client = source_p; | |
272 | hdata.target = target_p; | |
273 | ||
274 | if (!IsService(target_p)) | |
275 | { | |
276 | RB_DLINK_FOREACH(ptr, target_p->user->channel.head) | |
277 | { | |
278 | msptr = ptr->data; | |
279 | chptr = msptr->chptr; | |
280 | ||
281 | hdata.chptr = chptr; | |
282 | ||
283 | hdata.approved = ShowChannel(source_p, chptr); | |
284 | call_hook(doing_whois_channel_visibility_hook, &hdata); | |
285 | ||
286 | if(hdata.approved || operspy) | |
287 | { | |
288 | if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5)) | |
289 | { | |
290 | sendto_one(source_p, "%s", buf); | |
291 | cur_len = mlen + extra_space; | |
292 | t = buf + mlen; | |
293 | } | |
294 | ||
295 | tlen = sprintf(t, "%s%s%s ", | |
296 | hdata.approved ? "" : "!", | |
297 | find_channel_status(msptr, 1), | |
298 | chptr->chname); | |
299 | t += tlen; | |
300 | cur_len += tlen; | |
301 | } | |
302 | } | |
303 | } | |
304 | ||
305 | if(cur_len > mlen + extra_space) | |
306 | sendto_one(source_p, "%s", buf); | |
307 | ||
308 | sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER), | |
309 | target_p->name, target_p->servptr->name, | |
310 | target_p->servptr->info); | |
311 | ||
312 | if(target_p->user->away) | |
313 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), | |
314 | target_p->name, target_p->user->away); | |
315 | ||
316 | if(IsOper(target_p) && (!ConfigFileEntry.hide_opers_in_whois || IsOper(source_p))) | |
317 | { | |
318 | sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR), | |
319 | target_p->name, | |
320 | IsService(target_p) ? ConfigFileEntry.servicestring : | |
321 | (IsAdmin(target_p) ? GlobalSetOptions.adminstring : | |
322 | GlobalSetOptions.operstring)); | |
323 | } | |
324 | ||
325 | if(MyClient(target_p) && !EmptyString(target_p->localClient->opername) && IsOper(source_p)) | |
326 | { | |
327 | char buf[512]; | |
328 | snprintf(buf, sizeof(buf), "is opered as %s, privset %s", | |
329 | target_p->localClient->opername, target_p->localClient->privset->name); | |
330 | sendto_one_numeric(source_p, RPL_WHOISSPECIAL, form_str(RPL_WHOISSPECIAL), | |
331 | target_p->name, buf); | |
332 | } | |
333 | ||
334 | if(IsSSLClient(target_p)) | |
335 | { | |
336 | char cbuf[256] = "is using a secure connection"; | |
337 | ||
338 | if (MyClient(target_p) && target_p->localClient->cipher_string != NULL) | |
339 | rb_snprintf_append(cbuf, sizeof(cbuf), " [%s]", target_p->localClient->cipher_string); | |
340 | ||
341 | sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE), | |
342 | target_p->name, cbuf); | |
343 | if((source_p == target_p || IsOper(source_p)) && | |
344 | target_p->certfp != NULL) | |
345 | sendto_one_numeric(source_p, RPL_WHOISCERTFP, | |
346 | form_str(RPL_WHOISCERTFP), | |
347 | target_p->name, target_p->certfp); | |
348 | } | |
349 | ||
350 | if(MyClient(target_p)) | |
351 | { | |
352 | if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p)) | |
353 | { | |
354 | /* trick here: show a nonoper their own IP if | |
355 | * dynamic spoofed but not if auth{} spoofed | |
356 | * -- jilles */ | |
357 | ClearDynSpoof(target_p); | |
358 | sendto_one_numeric(source_p, RPL_WHOISHOST, | |
359 | form_str(RPL_WHOISHOST), | |
360 | target_p->name, target_p->orighost, | |
361 | show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255"); | |
362 | SetDynSpoof(target_p); | |
363 | } | |
364 | else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p)) | |
365 | sendto_one_numeric(source_p, RPL_WHOISACTUALLY, | |
366 | form_str(RPL_WHOISACTUALLY), | |
367 | target_p->name, target_p->sockhost); | |
368 | ||
369 | #ifdef RB_IPV6 | |
370 | if (target_p->localClient->ip.ss_family == AF_INET6 && | |
371 | (show_ip(source_p, target_p) || | |
372 | (source_p == target_p && !IsIPSpoof(target_p))) && | |
373 | ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4)) | |
374 | { | |
375 | rb_inet_ntop_sock((struct sockaddr *)&ip4, | |
376 | buf, sizeof buf); | |
377 | sendto_one_numeric(source_p, RPL_WHOISTEXT, | |
378 | "%s :Underlying IPv4 is %s", | |
379 | target_p->name, buf); | |
380 | } | |
381 | #endif /* RB_IPV6 */ | |
382 | ||
383 | sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE), | |
384 | target_p->name, | |
385 | (long)(rb_current_time() - target_p->localClient->last), | |
386 | (unsigned long)target_p->localClient->firsttime); | |
387 | } | |
388 | else | |
389 | { | |
390 | if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p)) | |
391 | { | |
392 | ClearDynSpoof(target_p); | |
393 | sendto_one_numeric(source_p, RPL_WHOISHOST, | |
394 | form_str(RPL_WHOISHOST), | |
395 | target_p->name, target_p->orighost, | |
396 | show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255"); | |
397 | SetDynSpoof(target_p); | |
398 | } | |
399 | else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) && | |
400 | !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")) | |
401 | { | |
402 | sendto_one_numeric(source_p, RPL_WHOISACTUALLY, | |
403 | form_str(RPL_WHOISACTUALLY), | |
404 | target_p->name, target_p->sockhost); | |
405 | ||
406 | } | |
407 | } | |
408 | ||
409 | /* doing_whois_hook must only be called for local clients, | |
410 | * doing_whois_global_hook must only be called for local targets | |
411 | */ | |
412 | /* it is important that these are called *before* RPL_ENDOFWHOIS is | |
413 | * sent, services compatibility code depends on it. --anfl | |
414 | */ | |
415 | if(MyClient(source_p)) | |
416 | call_hook(doing_whois_hook, &hdata); | |
417 | else | |
418 | call_hook(doing_whois_global_hook, &hdata); | |
419 | } |