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 "tools.h"
  27 #include "common.h"
  28 #include "client.h"
  29 #include "hash.h"
  30 #include "channel.h"
  31 #include "hash.h"
  32 #include "ircd.h"
  33 #include "numeric.h"
  34 #include "s_conf.h"
  35 #include "s_serv.h"
  36 #include "send.h"
  37 #include "irc_string.h"
  38 #include "sprintf_irc.h"
  39 #include "s_conf.h"
  40 #include "s_log.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 auspex);
  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: 148 $");
  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) > CurrentTime)
  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[1]);
  98                                 return 0;
  99                         }
 100                         else
 101                                 last_used = CurrentTime;
 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 auspex = 0;
 181
 182         nick = LOCAL_COPY(parv[1]);
 183         if((p = strchr(nick, ',')))
 184                 *p = '\0';
 185
 186         if(IsAuspex(source_p))
 187         {
 188                 auspex = 1;
 189         }
 190
 191         target_p = find_named_person(nick);
 192
 193         if(target_p != NULL)
 194         {
 195                 single_whois(source_p, target_p, auspex);
 196         }
 197         else
 198                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 199                                    form_str(ERR_NOSUCHNICK),
 200                                    IsDigit(*nick) ? "*" : nick);
 201
 202         sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 203                            form_str(RPL_ENDOFWHOIS), parv[1]);
 204         return;
 205 }
 206
 207 /*
 208  * single_whois()
 209  *
 210  * Inputs       - source_p client to report to
 211  *              - target_p client to report on
 212  * Output       - if found return 1
 213  * Side Effects - do a single whois on given client
 214  *                writing results to source_p
 215  */
 216 static void
 217 single_whois(struct Client *source_p, struct Client *target_p, int auspex)
 218 {
 219         char buf[BUFSIZE];
 220         dlink_node *ptr;
 221         struct Client *a2client_p;
 222         struct membership *msptr;
 223         struct Channel *chptr;
 224         int cur_len = 0;
 225         int mlen;
 226         char *t;
 227         int tlen;
 228         hook_data_client hdata;
 229         char *name;
 230         char quest[] = "?";
 231         int visible;
 232         int extra_space = 0;
 233
 234         if(target_p->name[0] == '\0')
 235                 name = quest;
 236         else
 237                 name = target_p->name;
 238
 239         if(target_p->user == NULL)
 240         {
 241                 s_assert(0);
 242                 return;
 243         }
 244
 245         a2client_p = target_p->servptr;
 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 = ircsprintf(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         DLINK_FOREACH(ptr, target_p->user->channel.head)
 271         {
 272                 msptr = ptr->data;
 273                 chptr = msptr->chptr;
 274
 275                 visible = IsService(target_p) ? IsMember(source_p, chptr) : ShowChannel(source_p, chptr);
 276
 277                 if(visible || auspex)
 278                 {
 279                         if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
 280                         {
 281                                 sendto_one(source_p, "%s", buf);
 282                                 cur_len = mlen + extra_space;
 283                                 t = buf + mlen;
 284                         }
 285
 286                         tlen = ircsprintf(t, "%s%s%s ",
 287                                         visible ? "" : "!",
 288                                         find_channel_status(msptr, 1),
 289                                         chptr->chname);
 290                         t += tlen;
 291                         cur_len += tlen;
 292                 }
 293         }
 294
 295         if(cur_len > mlen + extra_space)
 296                 sendto_one(source_p, "%s", buf);
 297
 298         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 299                            target_p->name, target_p->user->server,
 300                            a2client_p ? a2client_p->info : "*Not On This Net*");
 301
 302         if(target_p->user->away)
 303                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 304                                    target_p->name, target_p->user->away);
 305
 306         if(SeesOper(target_p, source_p))
 307         {
 308                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 309                                    target_p->name,
 310                                    IsService(target_p) ? ConfigFileEntry.servicestring :
 311                                    (IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 312                                     GlobalSetOptions.operstring));
 313
 314                 if (target_p->operflags &&
 315                         (IsOperStaffer(source_p) || source_p == target_p))
 316                 {
 317                         sendto_one_numeric(source_p, RPL_WHOISOPER_PRIVS,
 318                                             form_str(RPL_WHOISOPER_PRIVS),
 319                                             target_p->name, get_oper_privs(target_p->operflags));
 320                 }
 321         }
 322
 323         if(MyClient(target_p))
 324         {
 325                 if (IsDynSpoof(target_p) && (IsAuspex(source_p) || source_p == target_p))
 326                 {
 327                         /* trick here: show a nonoper their own IP if
 328                          * dynamic spoofed but not if auth{} spoofed
 329                          * -- jilles */
 330                         ClearDynSpoof(target_p);
 331                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 332                                            form_str(RPL_WHOISHOST),
 333                                            target_p->name, target_p->orighost,
 334                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 335                         SetDynSpoof(target_p);
 336                 }
 337                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 338                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 339                                            form_str(RPL_WHOISACTUALLY),
 340                                            target_p->name, target_p->sockhost);
 341
 342                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 343                                    target_p->name,
 344                                    CurrentTime - target_p->localClient->last,
 345                                    target_p->localClient->firsttime);
 346         }
 347         else
 348         {
 349                 if (IsDynSpoof(target_p) && (IsAuspex(source_p) || source_p == target_p))
 350                 {
 351                         ClearDynSpoof(target_p);
 352                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 353                                            form_str(RPL_WHOISHOST),
 354                                            target_p->name, target_p->orighost,
 355                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 356                         SetDynSpoof(target_p);
 357                 }
 358                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 359                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 360                 {
 361                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 362                                            form_str(RPL_WHOISACTUALLY),
 363                                            target_p->name, target_p->sockhost);
 364
 365                 }
 366
 367         }
 368
 369         hdata.client = source_p;
 370         hdata.target = target_p;
 371
 372         /* doing_whois_hook must only be called for local clients,
 373          * doing_whois_global_hook must only be called for local targets
 374          */
 375         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 376          * sent, services compatibility code depends on it. --anfl
 377          */
 378         if(MyClient(source_p))
 379                 call_hook(doing_whois_hook, &hdata);
 380         else
 381                 call_hook(doing_whois_global_hook, &hdata);
 382
 383         return;
 384 }
 385