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
  47 static void do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  48 static void single_whois(struct Client *source_p, struct Client *target_p, int operspy);
  49
  50 static int m_whois(struct Client *, struct Client *, int, const char **);
  51 static int ms_whois(struct Client *, struct Client *, int, const char **);
  52
  53 struct Message whois_msgtab = {
  54         "WHOIS", 0, 0, 0, MFLG_SLOW,
  55         {mg_unreg, {m_whois, 2}, {ms_whois, 2}, mg_ignore, mg_ignore, {m_whois, 2}}
  56 };
  57
  58 int doing_whois_hook;
  59 int doing_whois_global_hook;
  60
  61 mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL };
  62 mapi_hlist_av1 whois_hlist[] = {
  63         { "doing_whois",        &doing_whois_hook },
  64         { "doing_whois_global", &doing_whois_global_hook },
  65         { NULL, NULL }
  66 };
  67
  68 DECLARE_MODULE_AV1(whois, NULL, NULL, whois_clist, whois_hlist, NULL, "$Revision: 3536 $");
  69
  70 /*
  71  * m_whois
  72  *      parv[0] = sender prefix
  73  *      parv[1] = nickname masklist
  74  */
  75 static int
  76 m_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  77 {
  78         static time_t last_used = 0;
  79
  80         if(parc > 2)
  81         {
  82                 if(EmptyString(parv[2]))
  83                 {
  84                         sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
  85                                         me.name, source_p->name);
  86                         return 0;
  87                 }
  88
  89                 if(!IsOper(source_p))
  90                 {
  91                         /* seeing as this is going across servers, we should limit it */
  92                         if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time())
  93                         {
  94                                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  95                                            me.name, source_p->name, "WHOIS");
  96                                 sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
  97                                                    form_str(RPL_ENDOFWHOIS), parv[2]);
  98                                 return 0;
  99                         }
 100                         else
 101                                 last_used = rb_current_time();
 102                 }
 103
 104                 if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) !=
 105                    HUNTED_ISME)
 106                         return 0;
 107
 108                 parv[1] = parv[2];
 109
 110         }
 111         do_whois(client_p, source_p, parc, parv);
 112
 113         return 0;
 114 }
 115
 116 /*
 117  * ms_whois
 118  *      parv[0] = sender prefix
 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         if(MyClient(source_p))
 193                 target_p = find_named_person(nick);
 194         else
 195                 target_p = find_person(nick);
 196
 197         if(target_p != NULL)
 198         {
 199                 if(operspy)
 200                 {
 201                         char buffer[BUFSIZE];
 202
 203                         snprintf(buffer, sizeof(buffer), "%s!%s@%s %s",
 204                                 target_p->name, target_p->username,
 205                                 target_p->host, target_p->servptr->name);
 206                         report_operspy(source_p, "WHOIS", buffer);
 207                 }
 208
 209                 single_whois(source_p, target_p, operspy);
 210         }
 211         else
 212                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 213                                    form_str(ERR_NOSUCHNICK),
 214                                    nick);
 215
 216         sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 217                            form_str(RPL_ENDOFWHOIS), parv[1]);
 218         return;
 219 }
 220
 221 /*
 222  * single_whois()
 223  *
 224  * Inputs       - source_p client to report to
 225  *              - target_p client to report on
 226  * Output       - if found return 1
 227  * Side Effects - do a single whois on given client
 228  *                writing results to source_p
 229  */
 230 static void
 231 single_whois(struct Client *source_p, struct Client *target_p, int operspy)
 232 {
 233         char buf[BUFSIZE];
 234         rb_dlink_node *ptr;
 235         struct membership *msptr;
 236         struct Channel *chptr;
 237         int cur_len = 0;
 238         int mlen;
 239         char *t;
 240         int tlen;
 241         hook_data_client hdata;
 242         int visible;
 243         int extra_space = 0;
 244
 245         if(target_p->user == NULL)
 246         {
 247                 s_assert(0);
 248                 return;
 249         }
 250
 251         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 252                            target_p->name, target_p->username,
 253                            target_p->host, target_p->info);
 254
 255         cur_len = mlen = rb_sprintf(buf, form_str(RPL_WHOISCHANNELS),
 256                                     get_id(&me, source_p), get_id(source_p, source_p),
 257                                     target_p->name);
 258
 259         /* Make sure it won't overflow when sending it to the client
 260          * in full names; note that serverhiding may require more space
 261          * for a different server name (not done here) -- jilles
 262          */
 263         if (!MyConnect(source_p))
 264         {
 265                 extra_space = strlen(source_p->name) - 9;
 266                 if (extra_space < 0)
 267                         extra_space = 0;
 268                 extra_space += strlen(me.name) - 2; /* make sure >= 0 */
 269                 cur_len += extra_space;
 270         }
 271
 272         t = buf + mlen;
 273
 274         if (!IsService(target_p))
 275         {
 276                 RB_DLINK_FOREACH(ptr, target_p->user->channel.head)
 277                 {
 278                         msptr = ptr->data;
 279                         chptr = msptr->chptr;
 280
 281                         visible = ShowChannel(source_p, chptr);
 282
 283                         if(visible || operspy)
 284                         {
 285                                 if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
 286                                 {
 287                                         sendto_one(source_p, "%s", buf);
 288                                         cur_len = mlen + extra_space;
 289                                         t = buf + mlen;
 290                                 }
 291
 292                                 tlen = rb_sprintf(t, "%s%s%s ",
 293                                                 visible ? "" : "!",
 294                                                 find_channel_status(msptr, 1),
 295                                                 chptr->chname);
 296                                 t += tlen;
 297                                 cur_len += tlen;
 298                         }
 299                 }
 300         }
 301
 302         if(cur_len > mlen + extra_space)
 303                 sendto_one(source_p, "%s", buf);
 304
 305         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 306                            target_p->name, target_p->servptr->name,
 307                            target_p->servptr->info);
 308
 309         if(target_p->user->away)
 310                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 311                                    target_p->name, target_p->user->away);
 312
 313         if(IsOper(target_p))
 314         {
 315                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 316                                    target_p->name,
 317                                    IsService(target_p) ? ConfigFileEntry.servicestring :
 318                                    (IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 319                                     GlobalSetOptions.operstring));
 320         }
 321
 322         if(IsSSLClient(target_p))
 323                 sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
 324                                    target_p->name);
 325
 326         if(MyClient(target_p))
 327         {
 328                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 329                 {
 330                         /* trick here: show a nonoper their own IP if
 331                          * dynamic spoofed but not if auth{} spoofed
 332                          * -- jilles */
 333                         ClearDynSpoof(target_p);
 334                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 335                                            form_str(RPL_WHOISHOST),
 336                                            target_p->name, target_p->orighost,
 337                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 338                         SetDynSpoof(target_p);
 339                 }
 340                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 341                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 342                                            form_str(RPL_WHOISACTUALLY),
 343                                            target_p->name, target_p->sockhost);
 344
 345                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 346                                    target_p->name,
 347                                    rb_current_time() - target_p->localClient->last,
 348                                    target_p->localClient->firsttime);
 349         }
 350         else
 351         {
 352                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 353                 {
 354                         ClearDynSpoof(target_p);
 355                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 356                                            form_str(RPL_WHOISHOST),
 357                                            target_p->name, target_p->orighost,
 358                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 359                         SetDynSpoof(target_p);
 360                 }
 361                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 362                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 363                 {
 364                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 365                                            form_str(RPL_WHOISACTUALLY),
 366                                            target_p->name, target_p->sockhost);
 367
 368                 }
 369         }
 370
 371         hdata.client = source_p;
 372         hdata.target = target_p;
 373
 374         /* doing_whois_hook must only be called for local clients,
 375          * doing_whois_global_hook must only be called for local targets
 376          */
 377         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 378          * sent, services compatibility code depends on it. --anfl
 379          */
 380         if(MyClient(source_p))
 381                 call_hook(doing_whois_hook, &hdata);
 382         else
 383                 call_hook(doing_whois_global_hook, &hdata);
 384
 385         return;
 386 }
 387