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 "tools.h"
  29 #include "common.h"
  30 #include "client.h"
  31 #include "hash.h"
  32 #include "channel.h"
  33 #include "hash.h"
  34 #include "ircd.h"
  35 #include "numeric.h"
  36 #include "s_conf.h"
  37 #include "s_serv.h"
  38 #include "send.h"
  39 #include "irc_string.h"
  40 #include "sprintf_irc.h"
  41 #include "s_conf.h"
  42 #include "s_log.h"
  43 #include "msg.h"
  44 #include "parse.h"
  45 #include "modules.h"
  46 #include "hook.h"
  47 #include "s_newconf.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[0] = sender prefix
  75  *      parv[1] = nickname masklist
  76  */
  77 static int
  78 m_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  79 {
  80         static time_t last_used = 0;
  81
  82         if(parc > 2)
  83         {
  84                 if(EmptyString(parv[2]))
  85                 {
  86                         sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
  87                                         me.name, source_p->name);
  88                         return 0;
  89                 }
  90
  91                 if(!IsOper(source_p))
  92                 {
  93                         /* seeing as this is going across servers, we should limit it */
  94                         if((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
  95                         {
  96                                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  97                                            me.name, source_p->name, "WHOIS");
  98                                 sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
  99                                                    form_str(RPL_ENDOFWHOIS), parv[2]);
 100                                 return 0;
 101                         }
 102                         else
 103                                 last_used = CurrentTime;
 104                 }
 105
 106                 if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) !=
 107                    HUNTED_ISME)
 108                         return 0;
 109
 110                 parv[1] = parv[2];
 111
 112         }
 113         do_whois(client_p, source_p, parc, parv);
 114
 115         return 0;
 116 }
 117
 118 /*
 119  * ms_whois
 120  *      parv[0] = sender prefix
 121  *      parv[1] = server to reply
 122  *      parv[2] = nickname to whois
 123  */
 124 static int
 125 ms_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 126 {
 127         struct Client *target_p;
 128
 129         /* note: early versions of ratbox allowed users to issue a remote
 130          * whois with a blank parv[2], so we cannot treat it as a protocol
 131          * violation. --anfl
 132          */
 133         if(parc < 3 || EmptyString(parv[2]))
 134         {
 135                 sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
 136                                 me.name, source_p->name);
 137                 return 0;
 138         }
 139
 140         /* check if parv[1] exists */
 141         if((target_p = find_client(parv[1])) == NULL)
 142         {
 143                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
 144                                    form_str(ERR_NOSUCHSERVER),
 145                                    IsDigit(parv[1][0]) ? "*" : parv[1]);
 146                 return 0;
 147         }
 148
 149         /* if parv[1] isnt my client, or me, someone else is supposed
 150          * to be handling the request.. so send it to them
 151          */
 152         if(!MyClient(target_p) && !IsMe(target_p))
 153         {
 154                 sendto_one(target_p, ":%s WHOIS %s :%s",
 155                            get_id(source_p, target_p),
 156                            get_id(target_p, target_p), parv[2]);
 157                 return 0;
 158         }
 159
 160         /* ok, the target is either us, or a client on our server, so perform the whois
 161          * but first, parv[1] == server to perform the whois on, parv[2] == person
 162          * to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_
 163          */
 164         parv[1] = parv[2];
 165         do_whois(client_p, source_p, parc, parv);
 166
 167         return 0;
 168 }
 169
 170 /* do_whois
 171  *
 172  * inputs       - pointer to
 173  * output       -
 174  * side effects -
 175  */
 176 static void
 177 do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 178 {
 179         struct Client *target_p;
 180         char *nick;
 181         char *p = NULL;
 182         int operspy = 0;
 183
 184         nick = LOCAL_COPY(parv[1]);
 185         if((p = strchr(nick, ',')))
 186                 *p = '\0';
 187
 188         if(IsOperSpy(source_p) && *nick == '!')
 189         {
 190                 operspy = 1;
 191                 nick++;
 192         }
 193
 194         target_p = find_named_person(nick);
 195
 196         if(target_p != NULL)
 197         {
 198                 if(operspy)
 199                 {
 200                         char buffer[BUFSIZE];
 201
 202                         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         dlink_node *ptr;
 234         struct Client *a2client_p;
 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         char *name;
 243         char quest[] = "?";
 244         int visible;
 245         int extra_space = 0;
 246
 247         if(target_p->name[0] == '\0')
 248                 name = quest;
 249         else
 250                 name = target_p->name;
 251
 252         if(target_p->user == NULL)
 253         {
 254                 s_assert(0);
 255                 return;
 256         }
 257
 258         a2client_p = target_p->servptr;
 259
 260         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 261                            target_p->name, target_p->username,
 262                            target_p->host, target_p->info);
 263
 264         cur_len = mlen = ircsprintf(buf, form_str(RPL_WHOISCHANNELS),
 265                                     get_id(&me, source_p), get_id(source_p, source_p),
 266                                     target_p->name);
 267
 268         /* Make sure it won't overflow when sending it to the client
 269          * in full names; note that serverhiding may require more space
 270          * for a different server name (not done here) -- jilles
 271          */
 272         if (!MyConnect(source_p))
 273         {
 274                 extra_space = strlen(source_p->name) - 9;
 275                 if (extra_space < 0)
 276                         extra_space = 0;
 277                 extra_space += strlen(me.name) - 2; /* make sure >= 0 */
 278                 cur_len += extra_space;
 279         }
 280
 281         t = buf + mlen;
 282
 283         if (!IsService(target_p))
 284         {
 285                 DLINK_FOREACH(ptr, target_p->user->channel.head)
 286                 {
 287                         msptr = ptr->data;
 288                         chptr = msptr->chptr;
 289
 290                         visible = ShowChannel(source_p, chptr);
 291
 292                         if(visible || operspy)
 293                         {
 294                                 if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
 295                                 {
 296                                         sendto_one(source_p, "%s", buf);
 297                                         cur_len = mlen + extra_space;
 298                                         t = buf + mlen;
 299                                 }
 300
 301                                 tlen = ircsprintf(t, "%s%s%s ",
 302                                                 visible ? "" : "!",
 303                                                 find_channel_status(msptr, 1),
 304                                                 chptr->chname);
 305                                 t += tlen;
 306                                 cur_len += tlen;
 307                         }
 308                 }
 309         }
 310
 311         if(cur_len > mlen + extra_space)
 312                 sendto_one(source_p, "%s", buf);
 313
 314         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 315                            target_p->name, target_p->servptr->name,
 316                            a2client_p ? a2client_p->info : "*Not On This Net*");
 317
 318         if(target_p->user->away)
 319                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 320                                    target_p->name, target_p->user->away);
 321
 322         if(IsOper(target_p))
 323         {
 324                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 325                                    target_p->name,
 326                                    IsService(target_p) ? ConfigFileEntry.servicestring :
 327                                    (IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 328                                     GlobalSetOptions.operstring));
 329         }
 330
 331         if(MyClient(target_p))
 332         {
 333                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 334                 {
 335                         /* trick here: show a nonoper their own IP if
 336                          * dynamic spoofed but not if auth{} spoofed
 337                          * -- jilles */
 338                         ClearDynSpoof(target_p);
 339                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 340                                            form_str(RPL_WHOISHOST),
 341                                            target_p->name, target_p->orighost,
 342                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 343                         SetDynSpoof(target_p);
 344                 }
 345                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 346                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 347                                            form_str(RPL_WHOISACTUALLY),
 348                                            target_p->name, target_p->sockhost);
 349
 350                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 351                                    target_p->name,
 352                                    CurrentTime - target_p->localClient->last,
 353                                    target_p->localClient->firsttime);
 354         }
 355         else
 356         {
 357                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 358                 {
 359                         ClearDynSpoof(target_p);
 360                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 361                                            form_str(RPL_WHOISHOST),
 362                                            target_p->name, target_p->orighost,
 363                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 364                         SetDynSpoof(target_p);
 365                 }
 366                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 367                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 368                 {
 369                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 370                                            form_str(RPL_WHOISACTUALLY),
 371                                            target_p->name, target_p->sockhost);
 372
 373                 }
 374
 375         }
 376
 377         hdata.client = source_p;
 378         hdata.target = target_p;
 379
 380         /* doing_whois_hook must only be called for local clients,
 381          * doing_whois_global_hook must only be called for local targets
 382          */
 383         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 384          * sent, services compatibility code depends on it. --anfl
 385          */
 386         if(MyClient(source_p))
 387                 call_hook(doing_whois_hook, &hdata);
 388         else
 389                 call_hook(doing_whois_global_hook, &hdata);
 390
 391         return;
 392 }
 393