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
  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 "ratelimit.h"
  44 #include "s_assert.h"
  45
  46 static const char whois_desc[] =
  47         "Provides the WHOIS command to display information about a user";
  48
  49 static void do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  50 static void single_whois(struct Client *source_p, struct Client *target_p, int operspy);
  51
  52 static void m_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  53 static void ms_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  54
  55 struct Message whois_msgtab = {
  56         "WHOIS", 0, 0, 0, 0,
  57         {mg_unreg, {m_whois, 2}, {ms_whois, 2}, mg_ignore, mg_ignore, {m_whois, 2}}
  58 };
  59
  60 int doing_whois_hook;
  61 int doing_whois_global_hook;
  62 int doing_whois_channel_visibility_hook;
  63
  64 mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL };
  65 mapi_hlist_av1 whois_hlist[] = {
  66         { "doing_whois",                        &doing_whois_hook },
  67         { "doing_whois_global",                 &doing_whois_global_hook },
  68         { "doing_whois_channel_visibility",     &doing_whois_channel_visibility_hook },
  69         { NULL, NULL }
  70 };
  71
  72 DECLARE_MODULE_AV2(whois, NULL, NULL, whois_clist, whois_hlist, NULL, NULL, NULL, whois_desc);
  73
  74 /*
  75  * m_whois
  76  *      parv[1] = nickname masklist
  77  */
  78 static void
  79 m_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  80 {
  81         static time_t last_used = 0;
  82
  83         if(parc > 2)
  84         {
  85                 if(EmptyString(parv[2]))
  86                 {
  87                         sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
  88                                         me.name, source_p->name);
  89                         return;
  90                 }
  91
  92                 if(!IsOperGeneral(source_p))
  93                 {
  94                         /* seeing as this is going across servers, we should limit it */
  95                         if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time() || !ratelimit_client(source_p, 2))
  96                         {
  97                                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  98                                            me.name, source_p->name, "WHOIS");
  99                                 sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 100                                                    form_str(RPL_ENDOFWHOIS), parv[2]);
 101                                 return;
 102                         }
 103                         else
 104                                 last_used = rb_current_time();
 105                 }
 106
 107                 if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) !=
 108                    HUNTED_ISME)
 109                         return;
 110
 111                 parv[1] = parv[2];
 112
 113         }
 114         do_whois(client_p, source_p, parc, parv);
 115 }
 116
 117 /*
 118  * ms_whois
 119  *      parv[1] = server to reply
 120  *      parv[2] = nickname to whois
 121  */
 122 static void
 123 ms_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 124 {
 125         struct Client *target_p;
 126
 127         /* note: early versions of ratbox allowed users to issue a remote
 128          * whois with a blank parv[2], so we cannot treat it as a protocol
 129          * violation. --anfl
 130          */
 131         if(parc < 3 || EmptyString(parv[2]))
 132         {
 133                 sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
 134                                 me.name, source_p->name);
 135                 return;
 136         }
 137
 138         /* check if parv[1] exists */
 139         if((target_p = find_client(parv[1])) == NULL)
 140         {
 141                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
 142                                    form_str(ERR_NOSUCHSERVER),
 143                                    IsDigit(parv[1][0]) ? "*" : parv[1]);
 144                 return;
 145         }
 146
 147         /* if parv[1] isnt my client, or me, someone else is supposed
 148          * to be handling the request.. so send it to them
 149          */
 150         if(!MyClient(target_p) && !IsMe(target_p))
 151         {
 152                 sendto_one(target_p, ":%s WHOIS %s :%s",
 153                            get_id(source_p, target_p),
 154                            get_id(target_p, target_p), parv[2]);
 155                 return;
 156         }
 157
 158         /* ok, the target is either us, or a client on our server, so perform the whois
 159          * but first, parv[1] == server to perform the whois on, parv[2] == person
 160          * to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_
 161          */
 162         parv[1] = parv[2];
 163         do_whois(client_p, source_p, parc, parv);
 164 }
 165
 166 /* do_whois
 167  *
 168  * inputs       - pointer to
 169  * output       -
 170  * side effects -
 171  */
 172 static void
 173 do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 174 {
 175         struct Client *target_p;
 176         char *nick;
 177         char *p = NULL;
 178         int operspy = 0;
 179
 180         nick = LOCAL_COPY(parv[1]);
 181         if((p = strchr(nick, ',')))
 182                 *p = '\0';
 183
 184         if(IsOperSpy(source_p) && *nick == '!')
 185         {
 186                 operspy = 1;
 187                 nick++;
 188         }
 189
 190         target_p = find_named_person(nick);
 191         if(target_p != NULL)
 192         {
 193                 if(operspy)
 194                 {
 195                         char buffer[BUFSIZE];
 196
 197                         snprintf(buffer, sizeof(buffer), "%s!%s@%s %s",
 198                                 target_p->name, target_p->username,
 199                                 target_p->host, target_p->servptr->name);
 200                         report_operspy(source_p, "WHOIS", buffer);
 201                 }
 202
 203                 single_whois(source_p, target_p, operspy);
 204         }
 205         else
 206                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 207                                    form_str(ERR_NOSUCHNICK),
 208                                    nick);
 209
 210         sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 211                            form_str(RPL_ENDOFWHOIS), parv[1]);
 212 }
 213
 214 /*
 215  * single_whois()
 216  *
 217  * Inputs       - source_p client to report to
 218  *              - target_p client to report on
 219  * Output       - if found return 1
 220  * Side Effects - do a single whois on given client
 221  *                writing results to source_p
 222  */
 223 static void
 224 single_whois(struct Client *source_p, struct Client *target_p, int operspy)
 225 {
 226         char buf[BUFSIZE];
 227         hook_data_client hdata;
 228         struct sockaddr_in ip4;
 229
 230         if(target_p->user == NULL)
 231         {
 232                 s_assert(0);
 233                 return;
 234         }
 235
 236         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 237                            target_p->name, target_p->username,
 238                            target_p->host, target_p->info);
 239
 240         send_multiline_init(source_p, " ", form_str(RPL_WHOISCHANNELS),
 241                                     get_id(&me, source_p), get_id(source_p, source_p),
 242                                     target_p->name);
 243
 244         /* Make sure it won't overflow when sending it to the client
 245          * in full names; note that serverhiding may require more space
 246          * for a different server name (not done here) -- jilles
 247          */
 248         send_multiline_remote_pad(source_p, &me);
 249         send_multiline_remote_pad(source_p, source_p);
 250
 251         hdata.client = source_p;
 252         hdata.target = target_p;
 253
 254         if (!IsService(target_p))
 255         {
 256                 hook_data_channel_visibility hdata_vis;
 257                 rb_dlink_node *ps, *pt;
 258                 struct Channel *chptr;
 259                 struct membership *ms, *mt;
 260
 261                 hdata_vis.client = source_p;
 262                 hdata_vis.target = target_p;
 263
 264                 ITER_COMM_CHANNELS(ps, pt, source_p->user->channel.head, target_p->user->channel.head, ms, mt, chptr)
 265                 {
 266                         if (mt == NULL)
 267                                 continue;
 268
 269                         hdata_vis.chptr = chptr;
 270                         hdata_vis.clientms = ms;
 271                         hdata_vis.targetms = mt;
 272                         hdata_vis.approved = ms != NULL || PubChannel(chptr);
 273
 274                         call_hook(doing_whois_channel_visibility_hook, &hdata_vis);
 275
 276                         if(hdata_vis.approved || operspy)
 277                         {
 278                                 send_multiline_item(source_p, "%s%s%s",
 279                                                 hdata_vis.approved ? "" : "!",
 280                                                 find_channel_status(mt, 1),
 281                                                 chptr->chname);
 282                         }
 283                 }
 284         }
 285
 286         send_multiline_fini(source_p, NULL);
 287
 288         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 289                            target_p->name, target_p->servptr->name,
 290                            target_p->servptr->info);
 291
 292         if(target_p->user->away)
 293                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 294                                    target_p->name, target_p->user->away);
 295
 296         char *s = NULL;
 297         if (IsService(target_p))
 298         {
 299                 s = ConfigFileEntry.servicestring;
 300         }
 301         if (!EmptyString(target_p->user->opername) && IsOper(target_p))
 302         {
 303                 if (target_p == source_p || HasPrivilege(source_p, "oper:privs"))
 304                 {
 305                         const char *privset = "(missing)";
 306                         if (target_p->user->privset != NULL)
 307                                 privset = target_p->user->privset->name;
 308                         snprintf(buf, sizeof buf, "is opered as %s, privset %s", target_p->user->opername, privset);
 309                         s = buf;
 310                 }
 311                 else if (IsOper(source_p) && SeesOper(target_p, source_p))
 312                 {
 313                         snprintf(buf, sizeof buf, "is opered as %s", target_p->user->opername);
 314                         s = buf;
 315                 }
 316                 else if (!ConfigFileEntry.hide_opers_in_whois && SeesOper(target_p, source_p))
 317                 {
 318                         s = IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 319                             GlobalSetOptions.operstring;
 320                 }
 321         }
 322         if (s != NULL)
 323         {
 324                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 325                                 target_p->name, s);
 326         }
 327
 328         if(IsSecureClient(target_p))
 329         {
 330                 char cbuf[256] = "is using a secure connection";
 331
 332                 if (MyClient(target_p) && target_p->localClient->cipher_string != NULL &&
 333                                 (!ConfigFileEntry.tls_ciphers_oper_only || source_p == target_p || IsOper(source_p)))
 334                         rb_snprintf_append(cbuf, sizeof(cbuf), " [%s]", target_p->localClient->cipher_string);
 335
 336                 sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
 337                                    target_p->name, cbuf);
 338                 if((source_p == target_p || IsOperGeneral(source_p)) &&
 339                                 target_p->certfp != NULL)
 340                         sendto_one_numeric(source_p, RPL_WHOISCERTFP,
 341                                         form_str(RPL_WHOISCERTFP),
 342                                         target_p->name, target_p->certfp);
 343         }
 344
 345         if(MyClient(target_p))
 346         {
 347                 if (IsDynSpoof(target_p) && (HasPrivilege(source_p, "auspex:hostname") || source_p == target_p))
 348                 {
 349                         /* trick here: show a nonoper their own IP if
 350                          * dynamic spoofed but not if auth{} spoofed
 351                          * -- jilles */
 352                         ClearDynSpoof(target_p);
 353                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 354                                            form_str(RPL_WHOISHOST),
 355                                            target_p->name, target_p->orighost,
 356                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 357                         SetDynSpoof(target_p);
 358                 }
 359                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 360                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 361                                            form_str(RPL_WHOISACTUALLY),
 362                                            target_p->name, target_p->sockhost);
 363
 364                 if (GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET6 &&
 365                                 (show_ip(source_p, target_p) ||
 366                                  (source_p == target_p && !IsIPSpoof(target_p))) &&
 367                                 rb_ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4))
 368                 {
 369                         rb_inet_ntop_sock((struct sockaddr *)&ip4,
 370                                         buf, sizeof buf);
 371                         sendto_one_numeric(source_p, RPL_WHOISTEXT,
 372                                         "%s :Underlying IPv4 is %s",
 373                                         target_p->name, buf);
 374                 }
 375
 376                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 377                                    target_p->name,
 378                                    (long)(rb_current_time() - target_p->localClient->last),
 379                                    (unsigned long)target_p->localClient->firsttime);
 380         }
 381         else
 382         {
 383                 if (IsDynSpoof(target_p) && (HasPrivilege(source_p, "auspex:hostname") || source_p == target_p))
 384                 {
 385                         ClearDynSpoof(target_p);
 386                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 387                                            form_str(RPL_WHOISHOST),
 388                                            target_p->name, target_p->orighost,
 389                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 390                         SetDynSpoof(target_p);
 391                 }
 392                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 393                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 394                 {
 395                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 396                                            form_str(RPL_WHOISACTUALLY),
 397                                            target_p->name, target_p->sockhost);
 398
 399                 }
 400         }
 401
 402         /* doing_whois_hook must only be called for local clients,
 403          * doing_whois_global_hook must only be called for local targets
 404          */
 405         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 406          * sent, services compatibility code depends on it. --anfl
 407          */
 408         if(MyClient(source_p))
 409                 call_hook(doing_whois_hook, &hdata);
 410         else
 411                 call_hook(doing_whois_global_hook, &hdata);
 412 }