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
  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 int m_whois(struct Client *, struct Client *, int, const char **);
  53 static int ms_whois(struct Client *, struct Client *, int, const char **);
  54
  55 struct Message whois_msgtab = {
  56         "WHOIS", 0, 0, 0, MFLG_SLOW,
  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
  63 mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL };
  64 mapi_hlist_av1 whois_hlist[] = {
  65         { "doing_whois",        &doing_whois_hook },
  66         { "doing_whois_global", &doing_whois_global_hook },
  67         { NULL, NULL }
  68 };
  69
  70 DECLARE_MODULE_AV1(whois, NULL, NULL, whois_clist, whois_hlist, NULL, "$Revision: 3536 $");
  71
  72 /*
  73  * m_whois
  74  *      parv[1] = nickname masklist
  75  */
  76 static int
  77 m_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  78 {
  79         static time_t last_used = 0;
  80
  81         if(parc > 2)
  82         {
  83                 if(EmptyString(parv[2]))
  84                 {
  85                         sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
  86                                         me.name, source_p->name);
  87                         return 0;
  88                 }
  89
  90                 if(!IsOper(source_p))
  91                 {
  92                         /* seeing as this is going across servers, we should limit it */
  93                         if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time() || !ratelimit_client(source_p, 2))
  94                         {
  95                                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  96                                            me.name, source_p->name, "WHOIS");
  97                                 sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
  98                                                    form_str(RPL_ENDOFWHOIS), parv[2]);
  99                                 return 0;
 100                         }
 101                         else
 102                                 last_used = rb_current_time();
 103                 }
 104
 105                 if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) !=
 106                    HUNTED_ISME)
 107                         return 0;
 108
 109                 parv[1] = parv[2];
 110
 111         }
 112         do_whois(client_p, source_p, parc, parv);
 113
 114         return 0;
 115 }
 116
 117 /*
 118  * ms_whois
 119  *      parv[1] = server to reply
 120  *      parv[2] = nickname to whois
 121  */
 122 static int
 123 ms_whois(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 0;
 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 0;
 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 0;
 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         return 0;
 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                         rb_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         return;
 215 }
 216
 217 /*
 218  * single_whois()
 219  *
 220  * Inputs       - source_p client to report to
 221  *              - target_p client to report on
 222  * Output       - if found return 1
 223  * Side Effects - do a single whois on given client
 224  *                writing results to source_p
 225  */
 226 static void
 227 single_whois(struct Client *source_p, struct Client *target_p, int operspy)
 228 {
 229         char buf[BUFSIZE];
 230         rb_dlink_node *ptr;
 231         struct membership *msptr;
 232         struct Channel *chptr;
 233         int cur_len = 0;
 234         int mlen;
 235         char *t;
 236         int tlen;
 237         hook_data_client hdata;
 238         int visible;
 239         int extra_space = 0;
 240 #ifdef RB_IPV6
 241         struct sockaddr_in ip4;
 242 #endif
 243
 244         if(target_p->user == NULL)
 245         {
 246                 s_assert(0);
 247                 return;
 248         }
 249
 250         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 251                            target_p->name, target_p->username,
 252                            target_p->host, target_p->info);
 253
 254         cur_len = mlen = rb_sprintf(buf, form_str(RPL_WHOISCHANNELS),
 255                                     get_id(&me, source_p), get_id(source_p, source_p),
 256                                     target_p->name);
 257
 258         /* Make sure it won't overflow when sending it to the client
 259          * in full names; note that serverhiding may require more space
 260          * for a different server name (not done here) -- jilles
 261          */
 262         if (!MyConnect(source_p))
 263         {
 264                 extra_space = strlen(source_p->name) - 9;
 265                 if (extra_space < 0)
 266                         extra_space = 0;
 267                 extra_space += strlen(me.name) - 2; /* make sure >= 0 */
 268                 cur_len += extra_space;
 269         }
 270
 271         t = buf + mlen;
 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                         visible = ShowChannel(source_p, chptr);
 281
 282                         if(visible || operspy)
 283                         {
 284                                 if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
 285                                 {
 286                                         sendto_one(source_p, "%s", buf);
 287                                         cur_len = mlen + extra_space;
 288                                         t = buf + mlen;
 289                                 }
 290
 291                                 tlen = rb_sprintf(t, "%s%s%s ",
 292                                                 visible ? "" : "!",
 293                                                 find_channel_status(msptr, 1),
 294                                                 chptr->chname);
 295                                 t += tlen;
 296                                 cur_len += tlen;
 297                         }
 298                 }
 299         }
 300
 301         if(cur_len > mlen + extra_space)
 302                 sendto_one(source_p, "%s", buf);
 303
 304         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 305                            target_p->name, target_p->servptr->name,
 306                            target_p->servptr->info);
 307
 308         if(target_p->user->away)
 309                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 310                                    target_p->name, target_p->user->away);
 311
 312         if(IsOper(target_p))
 313         {
 314                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 315                                    target_p->name,
 316                                    IsService(target_p) ? ConfigFileEntry.servicestring :
 317                                    (IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 318                                     GlobalSetOptions.operstring));
 319         }
 320
 321         if(IsSSLClient(target_p))
 322                 sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
 323                                    target_p->name);
 324         if((source_p == target_p || IsOper(source_p)) &&
 325                         target_p->certfp != NULL)
 326                 sendto_one_numeric(source_p, RPL_WHOISCERTFP,
 327                                 form_str(RPL_WHOISCERTFP),
 328                                 target_p->name, target_p->certfp);
 329
 330         if(MyClient(target_p))
 331         {
 332                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 333                 {
 334                         /* trick here: show a nonoper their own IP if
 335                          * dynamic spoofed but not if auth{} spoofed
 336                          * -- jilles */
 337                         ClearDynSpoof(target_p);
 338                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 339                                            form_str(RPL_WHOISHOST),
 340                                            target_p->name, target_p->orighost,
 341                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 342                         SetDynSpoof(target_p);
 343                 }
 344                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 345                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 346                                            form_str(RPL_WHOISACTUALLY),
 347                                            target_p->name, target_p->sockhost);
 348
 349 #ifdef RB_IPV6
 350                 if (target_p->localClient->ip.ss_family == AF_INET6 &&
 351                                 (show_ip(source_p, target_p) ||
 352                                  (source_p == target_p && !IsIPSpoof(target_p))) &&
 353                                 ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4))
 354                 {
 355                         rb_inet_ntop_sock((struct sockaddr *)&ip4,
 356                                         buf, sizeof buf);
 357                         sendto_one_numeric(source_p, RPL_WHOISTEXT,
 358                                         "%s :Underlying IPv4 is %s",
 359                                         target_p->name, buf);
 360                 }
 361 #endif /* RB_IPV6 */
 362
 363                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 364                                    target_p->name,
 365                                    rb_current_time() - target_p->localClient->last,
 366                                    target_p->localClient->firsttime);
 367         }
 368         else
 369         {
 370                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 371                 {
 372                         ClearDynSpoof(target_p);
 373                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 374                                            form_str(RPL_WHOISHOST),
 375                                            target_p->name, target_p->orighost,
 376                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 377                         SetDynSpoof(target_p);
 378                 }
 379                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 380                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 381                 {
 382                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 383                                            form_str(RPL_WHOISACTUALLY),
 384                                            target_p->name, target_p->sockhost);
 385
 386                 }
 387         }
 388
 389         hdata.client = source_p;
 390         hdata.target = target_p;
 391
 392         /* doing_whois_hook must only be called for local clients,
 393          * doing_whois_global_hook must only be called for local targets
 394          */
 395         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 396          * sent, services compatibility code depends on it. --anfl
 397          */
 398         if(MyClient(source_p))
 399                 call_hook(doing_whois_hook, &hdata);
 400         else
 401                 call_hook(doing_whois_global_hook, &hdata);
 402
 403         return;
 404 }
 405