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 "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 }