1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2021 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_whois.c
23 * \brief Includes required functions for processing the WHOIS command.
24 * \version $Id: m_whois.c 9858 2021-01-01 04:43:42Z michael $
25 */
26
27 #include "stdinc.h"
28 #include "list.h"
29 #include "client.h"
30 #include "client_svstag.h"
31 #include "hash.h"
32 #include "channel.h"
33 #include "channel_mode.h"
34 #include "ircd.h"
35 #include "numeric.h"
36 #include "conf.h"
37 #include "misc.h"
38 #include "server.h"
39 #include "user.h"
40 #include "send.h"
41 #include "irc_string.h"
42 #include "parse.h"
43 #include "modules.h"
44
45
46 enum
47 {
48 WHOIS_SHOW_NORMAL,
49 WHOIS_SHOW_PREFIXED,
50 WHOIS_SHOW_NO
51 };
52
53 static int
whois_channel_show_type(struct Channel * channel,struct Client * source_p,struct Client * target_p)54 whois_channel_show_type(struct Channel *channel,
55 struct Client *source_p,
56 struct Client *target_p)
57 {
58 if (PubChannel(channel) && !HasUMode(target_p, UMODE_HIDECHANS))
59 return WHOIS_SHOW_NORMAL;
60
61 if (source_p == target_p || member_find_link(source_p, channel))
62 return WHOIS_SHOW_NORMAL;
63
64 if (HasUMode(source_p, UMODE_OPER))
65 return WHOIS_SHOW_PREFIXED;
66 return WHOIS_SHOW_NO;
67 }
68
69 /* whois_person()
70 *
71 * inputs - source_p client to report to
72 * - target_p client to report on
73 * output - NONE
74 * side effects -
75 */
76 static void
whois_person(struct Client * source_p,struct Client * target_p)77 whois_person(struct Client *source_p, struct Client *target_p)
78 {
79 dlink_node *node;
80 const struct ServicesTag *svstag = NULL;
81
82 sendto_one_numeric(source_p, &me, RPL_WHOISUSER, target_p->name,
83 target_p->username, target_p->host,
84 target_p->info);
85
86 if (dlink_list_length(&target_p->channel))
87 {
88 char buf[IRCD_BUFSIZE];
89 char *bufptr = buf;
90
91 /* :me.name 319 source_p->name target_p->name :~@#chan1 +#chan2 #chan3 ...\r\n */
92 /* 1 23456 7 89 0 1 */
93 size_t len = strlen(target_p->name) + 11;
94
95 if (MyConnect(source_p))
96 len += strlen(me.name) + strlen(source_p->name);
97 else
98 len += IRCD_MAX(strlen(me.name), strlen(me.id)) + IRCD_MAX(strlen(source_p->name), strlen(source_p->id));
99
100 DLINK_FOREACH(node, target_p->channel.head)
101 {
102 const struct ChannelMember *member = node->data;
103 int show = whois_channel_show_type(member->channel, source_p, target_p);
104
105 if (show != WHOIS_SHOW_NO)
106 {
107 if ((bufptr - buf) + member->channel->name_len + 1 + (show == WHOIS_SHOW_PREFIXED) + member_get_prefix_len(member, true) + len > sizeof(buf))
108 {
109 *(bufptr - 1) = '\0';
110 sendto_one_numeric(source_p, &me, RPL_WHOISCHANNELS, target_p->name, buf);
111 bufptr = buf;
112 }
113
114 bufptr += snprintf(bufptr, sizeof(buf) - (bufptr - buf), "%s%s%s ",
115 show == WHOIS_SHOW_PREFIXED ? "~" : "", member_get_prefix(member, true), member->channel->name);
116 }
117 }
118
119 if (bufptr != buf)
120 {
121 *(bufptr - 1) = '\0';
122 sendto_one_numeric(source_p, &me, RPL_WHOISCHANNELS, target_p->name, buf);
123 }
124 }
125
126 if ((ConfigServerHide.hide_servers || IsHidden(target_p->servptr)) &&
127 !(HasUMode(source_p, UMODE_OPER) || source_p == target_p))
128 sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, target_p->name,
129 ConfigServerHide.hidden_name,
130 ConfigServerInfo.network_description);
131 else
132 sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, target_p->name,
133 target_p->servptr->name, target_p->servptr->info);
134
135 if (HasUMode(target_p, UMODE_REGISTERED))
136 sendto_one_numeric(source_p, &me, RPL_WHOISREGNICK, target_p->name);
137
138 if (strcmp(target_p->account, "*"))
139 sendto_one_numeric(source_p, &me, RPL_WHOISACCOUNT, target_p->name,
140 target_p->account, "is");
141
142 if (target_p->away[0])
143 sendto_one_numeric(source_p, &me, RPL_AWAY, target_p->name,
144 target_p->away);
145
146 if (HasUMode(target_p, UMODE_CALLERID | UMODE_SOFTCALLERID))
147 {
148 bool callerid = HasUMode(target_p, UMODE_CALLERID) != 0;
149
150 sendto_one_numeric(source_p, &me, RPL_TARGUMODEG, target_p->name,
151 callerid ? "+g" : "+G",
152 callerid ? "server side ignore" :
153 "server side ignore with the exception of common channels");
154 }
155
156 if (HasUMode(target_p, UMODE_OPER) || HasFlag(target_p, FLAGS_SERVICE))
157 {
158 if (!HasUMode(target_p, UMODE_HIDDEN) || HasUMode(source_p, UMODE_OPER))
159 {
160 if (target_p->svstags.head)
161 svstag = target_p->svstags.head->data;
162
163 if (svstag == NULL || svstag->numeric != RPL_WHOISOPERATOR)
164 {
165 const char *text;
166 if (HasFlag(target_p, FLAGS_SERVICE))
167 text = "is a Network Service";
168 else if (HasUMode(target_p, UMODE_ADMIN))
169 text = "is a Server Administrator";
170 else /* HasUMode(target_p, UMODE_OPER) == true */
171 text = "is an IRC Operator";
172 sendto_one_numeric(source_p, &me, RPL_WHOISOPERATOR, target_p->name, text);
173 }
174 }
175 }
176
177 DLINK_FOREACH(node, target_p->svstags.head)
178 {
179 svstag = node->data;
180
181 if (svstag->numeric == RPL_WHOISOPERATOR)
182 if (HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER))
183 continue;
184
185 if (svstag->umodes == 0 || HasUMode(source_p, svstag->umodes))
186 sendto_one_numeric(source_p, &me, svstag->numeric | SND_EXPLICIT, "%s :%s",
187 target_p->name, svstag->tag);
188 }
189
190 if (HasUMode(target_p, UMODE_BOT))
191 sendto_one_numeric(source_p, &me, RPL_WHOISBOT, target_p->name);
192
193 if (HasUMode(target_p, UMODE_WEBIRC))
194 sendto_one_numeric(source_p, &me, RPL_WHOISTEXT, target_p->name,
195 "User connected using a webirc gateway");
196
197 if (HasUMode(source_p, UMODE_OPER) || source_p == target_p)
198 {
199 char buf[UMODE_MAX_STR];
200 char *m = buf;
201
202 *m++ = '+';
203 for (const struct user_modes *tab = umode_tab; tab->c; ++tab)
204 if (HasUMode(target_p, tab->flag))
205 *m++ = tab->c;
206 *m = '\0';
207
208 sendto_one_numeric(source_p, &me, RPL_WHOISMODES, target_p->name, buf);
209 }
210
211 if (HasUMode(source_p, UMODE_OPER) || source_p == target_p)
212 sendto_one_numeric(source_p, &me, RPL_WHOISACTUALLY, target_p->name,
213 target_p->username, target_p->realhost,
214 target_p->sockhost);
215
216 if (HasUMode(target_p, UMODE_SECURE))
217 sendto_one_numeric(source_p, &me, RPL_WHOISSECURE, target_p->name);
218
219 if (!EmptyString(target_p->tls_certfp))
220 if (HasUMode(source_p, UMODE_OPER) || source_p == target_p)
221 sendto_one_numeric(source_p, &me, RPL_WHOISCERTFP, target_p->name, target_p->tls_certfp);
222
223 if (MyConnect(target_p))
224 if (!HasUMode(target_p, UMODE_HIDEIDLE) || HasUMode(source_p, UMODE_OPER) ||
225 source_p == target_p)
226 sendto_one_numeric(source_p, &me, RPL_WHOISIDLE, target_p->name,
227 client_get_idle_time(source_p, target_p),
228 target_p->connection->created_real);
229
230 if (HasUMode(target_p, UMODE_SPY) && source_p != target_p)
231 sendto_one_notice(target_p, &me, ":*** Notice -- %s (%s@%s) [%s] is doing a /whois on you",
232 source_p->name, source_p->username, source_p->host, source_p->servptr->name);
233 }
234
235 /* do_whois()
236 *
237 * inputs - pointer to /whois source
238 * - number of parameters
239 * - pointer to parameters array
240 * output - pointer to void
241 * side effects - Does whois
242 */
243 static void
do_whois(struct Client * source_p,const char * name)244 do_whois(struct Client *source_p, const char *name)
245 {
246 struct Client *target_p;
247
248 if ((target_p = hash_find_client(name)) && IsClient(target_p))
249 whois_person(source_p, target_p);
250 else
251 sendto_one_numeric(source_p, &me, ERR_NOSUCHNICK, name);
252
253 sendto_one_numeric(source_p, &me, RPL_ENDOFWHOIS, name);
254 }
255
256 /*! \brief WHOIS command handler
257 *
258 * \param source_p Pointer to allocated Client struct from which the message
259 * originally comes from. This can be a local or remote client.
260 * \param parc Integer holding the number of supplied arguments.
261 * \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
262 * pointers.
263 * \note Valid arguments for this command are:
264 * - parv[0] = command
265 * - parv[1] = nickname/servername
266 * - parv[2] = nickname
267 */
268 static void
m_whois(struct Client * source_p,int parc,char * parv[])269 m_whois(struct Client *source_p, int parc, char *parv[])
270 {
271 static uintmax_t last_used = 0;
272
273 if (EmptyString(parv[1]))
274 {
275 sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
276 return;
277 }
278
279 if (!EmptyString(parv[2]))
280 {
281 /* seeing as this is going across servers, we should limit it */
282 if ((last_used + ConfigGeneral.pace_wait_simple) > event_base->time.sec_monotonic)
283 {
284 sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHOIS");
285 return;
286 }
287
288 last_used = event_base->time.sec_monotonic;
289
290 /*
291 * if we have serverhide enabled, they can either ask the clients
292 * server, or our server.. I don't see why they would need to ask
293 * anything else for info about the client.. --fl_
294 */
295 if (ConfigServerHide.disable_remote_commands)
296 parv[1] = parv[2];
297
298 if (server_hunt(source_p, ":%s WHOIS %s :%s", 1, parv)->ret != HUNTED_ISME)
299 return;
300
301 parv[1] = parv[2];
302 }
303
304 do_whois(source_p, parv[1]);
305 }
306
307 /*! \brief WHOIS command handler
308 *
309 * \param source_p Pointer to allocated Client struct from which the message
310 * originally comes from. This can be a local or remote client.
311 * \param parc Integer holding the number of supplied arguments.
312 * \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
313 * pointers.
314 * \note Valid arguments for this command are:
315 * - parv[0] = command
316 * - parv[1] = nickname/servername
317 * - parv[2] = nickname
318 */
319 static void
mo_whois(struct Client * source_p,int parc,char * parv[])320 mo_whois(struct Client *source_p, int parc, char *parv[])
321 {
322 if (EmptyString(parv[1]))
323 {
324 sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
325 return;
326 }
327
328 if (!EmptyString(parv[2]))
329 {
330 if (server_hunt(source_p, ":%s WHOIS %s :%s", 1, parv)->ret != HUNTED_ISME)
331 return;
332
333 parv[1] = parv[2];
334 }
335
336 do_whois(source_p, parv[1]);
337 }
338
339 static struct Message whois_msgtab =
340 {
341 .cmd = "WHOIS",
342 .handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
343 .handlers[CLIENT_HANDLER] = { .handler = m_whois },
344 .handlers[SERVER_HANDLER] = { .handler = mo_whois },
345 .handlers[ENCAP_HANDLER] = { .handler = m_ignore },
346 .handlers[OPER_HANDLER] = { .handler = mo_whois }
347 };
348
349 static void
module_init(void)350 module_init(void)
351 {
352 mod_add_cmd(&whois_msgtab);
353 }
354
355 static void
module_exit(void)356 module_exit(void)
357 {
358 mod_del_cmd(&whois_msgtab);
359 }
360
361 struct module module_entry =
362 {
363 .version = "$Revision: 9858 $",
364 .modinit = module_init,
365 .modexit = module_exit,
366 };
367