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 "s_user.h"
  47
  48 static void do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  49 static void single_whois(struct Client *source_p, struct Client *target_p, int operspy);
  50
  51 static int m_whois(struct Client *, struct Client *, int, const char **);
  52 static int ms_whois(struct Client *, struct Client *, int, const char **);
  53
  54 struct Message whois_msgtab = {
  55         "WHOIS", 0, 0, 0, MFLG_SLOW,
  56         {mg_unreg, {m_whois, 2}, {ms_whois, 2}, mg_ignore, mg_ignore, {m_whois, 2}}
  57 };
  58
  59 int doing_whois_hook;
  60 int doing_whois_global_hook;
  61
  62 mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL };
  63 mapi_hlist_av1 whois_hlist[] = {
  64         { "doing_whois",        &doing_whois_hook },
  65         { "doing_whois_global", &doing_whois_global_hook },
  66         { NULL, NULL }
  67 };
  68
  69 DECLARE_MODULE_AV1(whois, NULL, NULL, whois_clist, whois_hlist, NULL, "$Revision: 3536 $");
  70
  71 /*
  72  * m_whois
  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[1] = server to reply
 119  *      parv[2] = nickname to whois
 120  */
 121 static int
 122 ms_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 123 {
 124         struct Client *target_p;
 125
 126         /* note: early versions of ratbox allowed users to issue a remote
 127          * whois with a blank parv[2], so we cannot treat it as a protocol
 128          * violation. --anfl
 129          */
 130         if(parc < 3 || EmptyString(parv[2]))
 131         {
 132                 sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
 133                                 me.name, source_p->name);
 134                 return 0;
 135         }
 136
 137         /* check if parv[1] exists */
 138         if((target_p = find_client(parv[1])) == NULL)
 139         {
 140                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
 141                                    form_str(ERR_NOSUCHSERVER),
 142                                    IsDigit(parv[1][0]) ? "*" : parv[1]);
 143                 return 0;
 144         }
 145
 146         /* if parv[1] isnt my client, or me, someone else is supposed
 147          * to be handling the request.. so send it to them
 148          */
 149         if(!MyClient(target_p) && !IsMe(target_p))
 150         {
 151                 sendto_one(target_p, ":%s WHOIS %s :%s",
 152                            get_id(source_p, target_p),
 153                            get_id(target_p, target_p), parv[2]);
 154                 return 0;
 155         }
 156
 157         /* ok, the target is either us, or a client on our server, so perform the whois
 158          * but first, parv[1] == server to perform the whois on, parv[2] == person
 159          * to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_
 160          */
 161         parv[1] = parv[2];
 162         do_whois(client_p, source_p, parc, parv);
 163
 164         return 0;
 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         if(MyClient(source_p))
 192                 target_p = find_named_person(nick);
 193         else
 194                 target_p = find_person(nick);
 195
 196         if(target_p != NULL)
 197         {
 198                 if(operspy)
 199                 {
 200                         char buffer[BUFSIZE];
 201
 202                         rb_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         rb_dlink_node *ptr;
 234         struct membership *msptr;
 235         struct Channel *chptr;
 236         int cur_len = 0;
 237         int mlen;
 238         char *t;
 239         int tlen;
 240         hook_data_client hdata;
 241         int visible;
 242         int extra_space = 0;
 243         int i;
 244         char *m;
 245
 246         if(target_p->user == NULL)
 247         {
 248                 s_assert(0);
 249                 return;
 250         }
 251
 252         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 253                            target_p->name, target_p->username,
 254                            target_p->host, target_p->info);
 255
 256         cur_len = mlen = rb_sprintf(buf, form_str(RPL_WHOISCHANNELS),
 257                                     get_id(&me, source_p), get_id(source_p, source_p),
 258                                     target_p->name);
 259
 260         /* Make sure it won't overflow when sending it to the client
 261          * in full names; note that serverhiding may require more space
 262          * for a different server name (not done here) -- jilles
 263          */
 264         if (!MyConnect(source_p))
 265         {
 266                 extra_space = strlen(source_p->name) - 9;
 267                 if (extra_space < 0)
 268                         extra_space = 0;
 269                 extra_space += strlen(me.name) - 2; /* make sure >= 0 */
 270                 cur_len += extra_space;
 271         }
 272
 273         t = buf + mlen;
 274
 275         if (!IsService(target_p))
 276         {
 277                 RB_DLINK_FOREACH(ptr, target_p->user->channel.head)
 278                 {
 279                         msptr = ptr->data;
 280                         chptr = msptr->chptr;
 281
 282                         visible = ShowChannel(source_p, chptr);
 283
 284                         if(visible || operspy)
 285                         {
 286                                 if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
 287                                 {
 288                                         sendto_one(source_p, "%s", buf);
 289                                         cur_len = mlen + extra_space;
 290                                         t = buf + mlen;
 291                                 }
 292
 293                                 tlen = rb_sprintf(t, "%s%s%s ",
 294                                                 visible ? "" : "!",
 295                                                 find_channel_status(msptr, 1),
 296                                                 chptr->chname);
 297                                 t += tlen;
 298                                 cur_len += tlen;
 299                         }
 300                 }
 301         }
 302
 303         if(cur_len > mlen + extra_space)
 304                 sendto_one(source_p, "%s", buf);
 305
 306         sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
 307                            target_p->name, target_p->servptr->name,
 308                            target_p->servptr->info);
 309
 310         if(target_p->user->away)
 311                 sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 312                                    target_p->name, target_p->user->away);
 313
 314         if(IsOper(target_p))
 315         {
 316                 sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
 317                                    target_p->name,
 318                                    IsService(target_p) ? ConfigFileEntry.servicestring :
 319                                    (IsAdmin(target_p) ? GlobalSetOptions.adminstring :
 320                                     GlobalSetOptions.operstring));
 321         }
 322
 323         if(IsSSLClient(target_p))
 324                 sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
 325                                    target_p->name);
 326         if((source_p == target_p || IsOper(source_p)) &&
 327                         target_p->certfp != NULL)
 328                 sendto_one_numeric(source_p, RPL_WHOISCERTFP,
 329                                 form_str(RPL_WHOISCERTFP),
 330                                 target_p->name, target_p->certfp);
 331
 332         if(IsSetBot(target_p))
 333                 sendto_one_numeric(source_p, RPL_WHOISBOT,
 334                                 form_str(RPL_WHOISBOT),
 335                                 target_p->name);
 336         if(IsOper(source_p))
 337         {
 338                 m = buf;
 339                 *m++ = '+';
 340
 341                 for (i = 0; i < 128; i++) /* >= 127 is extended ascii */
 342                         if (target_p->umodes & user_modes[i])
 343                                 *m++ = (char) i;
 344                                 *m = '\0';
 345
 346                 sendto_one_numeric(source_p, RPL_WHOISMODES,
 347                                 form_str(RPL_WHOISMODES),
 348                                 target_p->name, buf);
 349         }
 350
 351         if(MyClient(target_p))
 352         {
 353                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 354                 {
 355                         /* trick here: show a nonoper their own IP if
 356                          * dynamic spoofed but not if auth{} spoofed
 357                          * -- jilles */
 358                         ClearDynSpoof(target_p);
 359                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 360                                            form_str(RPL_WHOISHOST),
 361                                            target_p->name, target_p->orighost,
 362                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 363                         SetDynSpoof(target_p);
 364                 }
 365                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 366                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 367                                            form_str(RPL_WHOISACTUALLY),
 368                                            target_p->name, target_p->sockhost);
 369
 370                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 371                                    target_p->name,
 372                                    rb_current_time() - target_p->localClient->last,
 373                                    target_p->localClient->firsttime);
 374         }
 375         else
 376         {
 377                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 378                 {
 379                         ClearDynSpoof(target_p);
 380                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 381                                            form_str(RPL_WHOISHOST),
 382                                            target_p->name, target_p->orighost,
 383                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 384                         SetDynSpoof(target_p);
 385                 }
 386                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 387                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 388                 {
 389                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 390                                            form_str(RPL_WHOISACTUALLY),
 391                                            target_p->name, target_p->sockhost);
 392
 393                 }
 394         }
 395
 396         hdata.client = source_p;
 397         hdata.target = target_p;
 398
 399         /* doing_whois_hook must only be called for local clients,
 400          * doing_whois_global_hook must only be called for local targets
 401          */
 402         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 403          * sent, services compatibility code depends on it. --anfl
 404          */
 405         if(MyClient(source_p))
 406                 call_hook(doing_whois_hook, &hdata);
 407         else
 408                 call_hook(doing_whois_global_hook, &hdata);
 409
 410         return;
 411 }
 412