modules/m_whois.c

   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  *  $Id: m_whois.c 3536 2007-07-14 21:50:21Z jilles $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "common.h"
  29 #include "client.h"
  30 #include "hash.h"
  31 #include "channel.h"
  32 #include "hash.h"
  33 #include "ircd.h"
  34 #include "numeric.h"
  35 #include "s_conf.h"
  36 #include "s_serv.h"
  37 #include "send.h"
  38 #include "match.h"
  39 #include "s_conf.h"
  40 #include "logger.h"
  41 #include "msg.h"
  42 #include "parse.h"
  43 #include "modules.h"
  44 #include "hook.h"
  45 #include "s_newconf.h"
  46 #include "ipv4_from_ipv6.h"
  47 #include "ratelimit.h"
  48 #include "s_assert.h"
  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 int m_whois(struct Client *, struct Client *, int, const char **);
  54 static int ms_whois(struct Client *, struct Client *, int, const char **);
  55
  56 struct Message whois_msgtab = {
  57         "WHOIS", 0, 0, 0, MFLG_SLOW,
  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_AV1(whois, NULL, NULL, whois_clist, whois_hlist, NULL, "$Revision: 3536 $");
  74
  75 /*
  76  * m_whois
  77  *      parv[1] = nickname masklist
  78  */
  79 static int
  80 m_whois(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 0;
  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 0;
 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 0;
 111
 112                 parv[1] = parv[2];
 113
 114         }
 115         do_whois(client_p, source_p, parc, parv);
 116
 117         return 0;
 118 }
 119
 120 /*
 121  * ms_whois
 122  *      parv[1] = server to reply
 123  *      parv[2] = nickname to whois
 124  */
 125 static int
 126 ms_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 127 {
 128         struct Client *target_p;
 129
 130         /* note: early versions of ratbox allowed users to issue a remote
 131          * whois with a blank parv[2], so we cannot treat it as a protocol
 132          * violation. --anfl
 133          */
 134         if(parc < 3 || EmptyString(parv[2]))
 135         {
 136                 sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
 137                                 me.name, source_p->name);
 138                 return 0;
 139         }
 140
 141         /* check if parv[1] exists */
 142         if((target_p = find_client(parv[1])) == NULL)
 143         {
 144                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
 145                                    form_str(ERR_NOSUCHSERVER),
 146                                    IsDigit(parv[1][0]) ? "*" : parv[1]);
 147                 return 0;
 148         }
 149
 150         /* if parv[1] isnt my client, or me, someone else is supposed
 151          * to be handling the request.. so send it to them
 152          */
 153         if(!MyClient(target_p) && !IsMe(target_p))
 154         {
 155                 sendto_one(target_p, ":%s WHOIS %s :%s",
 156                            get_id(source_p, target_p),
 157                            get_id(target_p, target_p), parv[2]);
 158                 return 0;
 159         }
 160
 161         /* ok, the target is either us, or a client on our server, so perform the whois
 162          * but first, parv[1] == server to perform the whois on, parv[2] == person
 163          * to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_
 164          */
 165         parv[1] = parv[2];
 166         do_whois(client_p, source_p, parc, parv);
 167
 168         return 0;
 169 }
 170
 171 /* do_whois
 172  *
 173  * inputs       - pointer to
 174  * output       -
 175  * side effects -
 176  */
 177 static void
 178 do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 179 {
 180         struct Client *target_p;
 181         char *nick;
 182         char *p = NULL;
 183         int operspy = 0;
 184
 185         nick = LOCAL_COPY(parv[1]);
 186         if((p = strchr(nick, ',')))
 187                 *p = '\0';
 188
 189         if(IsOperSpy(source_p) && *nick == '!')
 190         {
 191                 operspy = 1;
 192                 nick++;
 193         }
 194
 195         target_p = find_named_person(nick);
 196         if(target_p != NULL)
 197         {
 198                 if(operspy)
 199                 {
 200                         char buffer[BUFSIZE];
 201
 202                         rb_snprintf(buffer, sizeof(buffer), "%s!%s@%s %s",
 203                                 target_p->name, target_p->username,
 204                                 target_p->host, target_p->servptr->name);
 205                         report_operspy(source_p, "WHOIS", buffer);
 206                 }
 207
 208                 single_whois(source_p, target_p, operspy);
 209         }
 210         else
 211                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 212                                    form_str(ERR_NOSUCHNICK),
 213                                    nick);
 214
 215         sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 216                            form_str(RPL_ENDOFWHOIS), parv[1]);
 217         return;
 218 }
 219
 220 /*
 221  * single_whois()
 222  *
 223  * Inputs       - source_p client to report to
 224  *              - target_p client to report on
 225  * Output       - if found return 1
 226  * Side Effects - do a single whois on given client
 227  *                writing results to source_p
 228  */
 229 static void
 230 single_whois(struct Client *source_p, struct Client *target_p, int operspy)
 231 {
 232         char buf[BUFSIZE];
 233         rb_dlink_node *ptr;
 234         struct membership *msptr;
 235         struct Channel *chptr;
 236         int cur_len = 0;
 237         int mlen;
 238         char *t;
 239         int tlen;
 240         hook_data_client hdata;
 241         int extra_space = 0;
 242 #ifdef RB_IPV6
 243         struct sockaddr_in ip4;
 244 #endif
 245
 246         if(target_p->user == NULL)
 247         {
 248                 s_assert(0);
 249                 return;
 250         }
 251
 252         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 253                            target_p->name, target_p->username,
 254                            target_p->host, target_p->info);
 255
 256         cur_len = mlen = rb_sprintf(buf, form_str(RPL_WHOISCHANNELS),
 257                                     get_id(&me, source_p), get_id(source_p, source_p),
 258                                     target_p->name);
 259
 260         /* Make sure it won't overflow when sending it to the client
 261          * in full names; note that serverhiding may require more space
 262          * for a different server name (not done here) -- jilles
 263          */
 264         if (!MyConnect(source_p))
 265         {
 266                 extra_space = strlen(source_p->name) - 9;
 267                 if (extra_space < 0)
 268                         extra_space = 0;
 269                 extra_space += strlen(me.name) - 2; /* make sure >= 0 */
 270                 cur_len += extra_space;
 271         }
 272
 273         t = buf + mlen;
 274
 275         hdata.client = source_p;
 276         hdata.target = target_p;
 277
 278         if (!IsService(target_p))
 279         {
 280                 RB_DLINK_FOREACH(ptr, target_p->user->channel.head)
 281                 {
 282                         msptr = ptr->data;
 283                         chptr = msptr->chptr;
 284
 285                         hdata.chptr = chptr;
 286
 287                         hdata.approved = ShowChannel(source_p, chptr);
 288                         call_hook(doing_whois_channel_visibility_hook, &hdata);
 289
 290                         if(hdata.approved || operspy)
 291                         {
 292                                 if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
 293                                 {
 294                                         sendto_one(source_p, "%s", buf);
 295                                         cur_len = mlen + extra_space;
 296                                         t = buf + mlen;
 297                                 }
 298
 299                                 tlen = rb_sprintf(t, "%s%s%s ",
 300                                                 hdata.approved ? "" : "!",
 301                                                 find_channel_status(msptr, 1),
 302                                                 chptr->chname);
 303                                 t += tlen;
 304                                 cur_len += tlen;
 305                         }
 306                 }
 307         }
 308
 309         if(cur_len > mlen + extra_space)
 310                 sendto_one(source_p, "%s", buf);
 311
 312         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 313                            target_p->name, target_p->servptr->name,
 314                            target_p->servptr->info);
 315
 316         if(target_p->user->away)
 317                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 318                                    target_p->name, target_p->user->away);
 319
 320         if(IsOper(target_p) && (!ConfigFileEntry.hide_opers_in_whois || source_p == target_p))
 321         {
 322                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 323                                    target_p->name,
 324                                    IsService(target_p) ? ConfigFileEntry.servicestring :
 325                                    (IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 326                                     GlobalSetOptions.operstring));
 327         }
 328
 329         if(MyClient(target_p) && !EmptyString(target_p->localClient->opername) && IsOper(source_p))
 330         {
 331                 char buf[512];
 332                 rb_snprintf(buf, sizeof(buf), "is opered as %s, privset %s",
 333                             target_p->localClient->opername, target_p->localClient->privset->name);
 334                 sendto_one_numeric(source_p, RPL_WHOISSPECIAL, form_str(RPL_WHOISSPECIAL),
 335                                    target_p->name, buf);
 336         }
 337
 338         if(IsSSLClient(target_p))
 339         {
 340                 char cbuf[256] = "is using a secure connection";
 341
 342                 if (MyClient(target_p) && target_p->localClient->cipher_string != NULL)
 343                         rb_snprintf_append(cbuf, sizeof(cbuf), " [%s]", target_p->localClient->cipher_string);
 344
 345                 sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
 346                                    target_p->name, cbuf);
 347                 if((source_p == target_p || IsOper(source_p)) &&
 348                                 target_p->certfp != NULL)
 349                         sendto_one_numeric(source_p, RPL_WHOISCERTFP,
 350                                         form_str(RPL_WHOISCERTFP),
 351                                         target_p->name, target_p->certfp);
 352         }
 353
 354         if(MyClient(target_p))
 355         {
 356                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 357                 {
 358                         /* trick here: show a nonoper their own IP if
 359                          * dynamic spoofed but not if auth{} spoofed
 360                          * -- jilles */
 361                         ClearDynSpoof(target_p);
 362                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 363                                            form_str(RPL_WHOISHOST),
 364                                            target_p->name, target_p->orighost,
 365                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 366                         SetDynSpoof(target_p);
 367                 }
 368                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 369                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 370                                            form_str(RPL_WHOISACTUALLY),
 371                                            target_p->name, target_p->sockhost);
 372
 373 #ifdef RB_IPV6
 374                 if (target_p->localClient->ip.ss_family == AF_INET6 &&
 375                                 (show_ip(source_p, target_p) ||
 376                                  (source_p == target_p && !IsIPSpoof(target_p))) &&
 377                                 ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4))
 378                 {
 379                         rb_inet_ntop_sock((struct sockaddr *)&ip4,
 380                                         buf, sizeof buf);
 381                         sendto_one_numeric(source_p, RPL_WHOISTEXT,
 382                                         "%s :Underlying IPv4 is %s",
 383                                         target_p->name, buf);
 384                 }
 385 #endif /* RB_IPV6 */
 386
 387                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 388                                    target_p->name,
 389                                    (long)(rb_current_time() - target_p->localClient->last),
 390                                    (unsigned long)target_p->localClient->firsttime);
 391         }
 392         else
 393         {
 394                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 395                 {
 396                         ClearDynSpoof(target_p);
 397                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 398                                            form_str(RPL_WHOISHOST),
 399                                            target_p->name, target_p->orighost,
 400                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 401                         SetDynSpoof(target_p);
 402                 }
 403                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 404                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 405                 {
 406                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 407                                            form_str(RPL_WHOISACTUALLY),
 408                                            target_p->name, target_p->sockhost);
 409
 410                 }
 411         }
 412
 413         /* doing_whois_hook must only be called for local clients,
 414          * doing_whois_global_hook must only be called for local targets
 415          */
 416         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 417          * sent, services compatibility code depends on it. --anfl
 418          */
 419         if(MyClient(source_p))
 420                 call_hook(doing_whois_hook, &hdata);
 421         else
 422                 call_hook(doing_whois_global_hook, &hdata);
 423
 424         return;
 425 }
 426