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 "client.h"
  27 #include "hash.h"
  28 #include "channel.h"
  29 #include "hash.h"
  30 #include "ircd.h"
  31 #include "numeric.h"
  32 #include "s_conf.h"
  33 #include "s_serv.h"
  34 #include "send.h"
  35 #include "match.h"
  36 #include "s_conf.h"
  37 #include "logger.h"
  38 #include "msg.h"
  39 #include "parse.h"
  40 #include "modules.h"
  41 #include "hook.h"
  42 #include "s_newconf.h"
  43 #include "ratelimit.h"
  44 #include "s_assert.h"
  45
  46 static const char whois_desc[] =
  47         "Provides the WHOIS command to display information about a user";
  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 void m_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  53 static void ms_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  54
  55 struct Message whois_msgtab = {
  56         "WHOIS", 0, 0, 0, 0,
  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 int doing_whois_channel_visibility_hook;
  63
  64 mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL };
  65 mapi_hlist_av1 whois_hlist[] = {
  66         { "doing_whois",                        &doing_whois_hook },
  67         { "doing_whois_global",                 &doing_whois_global_hook },
  68         { "doing_whois_channel_visibility",     &doing_whois_channel_visibility_hook },
  69         { NULL, NULL }
  70 };
  71
  72 DECLARE_MODULE_AV2(whois, NULL, NULL, whois_clist, whois_hlist, NULL, NULL, NULL, whois_desc);
  73
  74 /*
  75  * m_whois
  76  *      parv[1] = nickname masklist
  77  */
  78 static void
  79 m_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  80 {
  81         static time_t last_used = 0;
  82
  83         if(parc > 2)
  84         {
  85                 if(EmptyString(parv[2]))
  86                 {
  87                         sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
  88                                         me.name, source_p->name);
  89                         return;
  90                 }
  91
  92                 if(!IsOper(source_p))
  93                 {
  94                         /* seeing as this is going across servers, we should limit it */
  95                         if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time() || !ratelimit_client(source_p, 2))
  96                         {
  97                                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  98                                            me.name, source_p->name, "WHOIS");
  99                                 sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 100                                                    form_str(RPL_ENDOFWHOIS), parv[2]);
 101                                 return;
 102                         }
 103                         else
 104                                 last_used = rb_current_time();
 105                 }
 106
 107                 if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) !=
 108                    HUNTED_ISME)
 109                         return;
 110
 111                 parv[1] = parv[2];
 112
 113         }
 114         do_whois(client_p, source_p, parc, parv);
 115 }
 116
 117 /*
 118  * ms_whois
 119  *      parv[1] = server to reply
 120  *      parv[2] = nickname to whois
 121  */
 122 static void
 123 ms_whois(struct MsgBuf *msgbuf_p, 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;
 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;
 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;
 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
 166 /* do_whois
 167  *
 168  * inputs       - pointer to
 169  * output       -
 170  * side effects -
 171  */
 172 static void
 173 do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 174 {
 175         struct Client *target_p;
 176         char *nick;
 177         char *p = NULL;
 178         int operspy = 0;
 179
 180         nick = LOCAL_COPY(parv[1]);
 181         if((p = strchr(nick, ',')))
 182                 *p = '\0';
 183
 184         if(IsOperSpy(source_p) && *nick == '!')
 185         {
 186                 operspy = 1;
 187                 nick++;
 188         }
 189
 190         target_p = find_named_person(nick);
 191         if(target_p != NULL)
 192         {
 193                 if(operspy)
 194                 {
 195                         char buffer[BUFSIZE];
 196
 197                         snprintf(buffer, sizeof(buffer), "%s!%s@%s %s",
 198                                 target_p->name, target_p->username,
 199                                 target_p->host, target_p->servptr->name);
 200                         report_operspy(source_p, "WHOIS", buffer);
 201                 }
 202
 203                 single_whois(source_p, target_p, operspy);
 204         }
 205         else
 206                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 207                                    form_str(ERR_NOSUCHNICK),
 208                                    nick);
 209
 210         sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
 211                            form_str(RPL_ENDOFWHOIS), parv[1]);
 212 }
 213
 214 /*
 215  * single_whois()
 216  *
 217  * Inputs       - source_p client to report to
 218  *              - target_p client to report on
 219  * Output       - if found return 1
 220  * Side Effects - do a single whois on given client
 221  *                writing results to source_p
 222  */
 223 static void
 224 single_whois(struct Client *source_p, struct Client *target_p, int operspy)
 225 {
 226         char buf[BUFSIZE];
 227         rb_dlink_node *ptr;
 228         struct membership *msptr;
 229         struct Channel *chptr;
 230         int cur_len = 0;
 231         int mlen;
 232         char *t;
 233         int tlen;
 234         hook_data_client hdata;
 235         int extra_space = 0;
 236         struct sockaddr_in ip4;
 237
 238         if(target_p->user == NULL)
 239         {
 240                 s_assert(0);
 241                 return;
 242         }
 243
 244         sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
 245                            target_p->name, target_p->username,
 246                            target_p->host, target_p->info);
 247
 248         cur_len = mlen = sprintf(buf, form_str(RPL_WHOISCHANNELS),
 249                                     get_id(&me, source_p), get_id(source_p, source_p),
 250                                     target_p->name);
 251
 252         /* Make sure it won't overflow when sending it to the client
 253          * in full names; note that serverhiding may require more space
 254          * for a different server name (not done here) -- jilles
 255          */
 256         if (!MyConnect(source_p))
 257         {
 258                 extra_space = strlen(source_p->name) - 9;
 259                 if (extra_space < 0)
 260                         extra_space = 0;
 261                 extra_space += strlen(me.name) - 2; /* make sure >= 0 */
 262                 cur_len += extra_space;
 263         }
 264
 265         t = buf + mlen;
 266
 267         hdata.client = source_p;
 268         hdata.target = target_p;
 269
 270         if (!IsService(target_p))
 271         {
 272                 RB_DLINK_FOREACH(ptr, target_p->user->channel.head)
 273                 {
 274                         msptr = ptr->data;
 275                         chptr = msptr->chptr;
 276
 277                         hdata.chptr = chptr;
 278
 279                         hdata.approved = ShowChannel(source_p, chptr);
 280                         call_hook(doing_whois_channel_visibility_hook, &hdata);
 281
 282                         if(hdata.approved || 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 = sprintf(t, "%s%s%s ",
 292                                                 hdata.approved ? "" : "!",
 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((!ConfigFileEntry.hide_opers_in_whois || IsOper(source_p)) && SeesOper(target_p, source_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(MyClient(target_p) && !EmptyString(target_p->localClient->opername) && IsOper(target_p) && IsOper(source_p))
 322         {
 323                 char buf[512];
 324                 snprintf(buf, sizeof(buf), "is opered as %s, privset %s",
 325                             target_p->localClient->opername, target_p->localClient->privset->name);
 326                 sendto_one_numeric(source_p, RPL_WHOISSPECIAL, form_str(RPL_WHOISSPECIAL),
 327                                    target_p->name, buf);
 328         }
 329
 330         if(IsSSLClient(target_p))
 331         {
 332                 char cbuf[256] = "is using a secure connection";
 333
 334                 if (MyClient(target_p) && target_p->localClient->cipher_string != NULL)
 335                         rb_snprintf_append(cbuf, sizeof(cbuf), " [%s]", target_p->localClient->cipher_string);
 336
 337                 sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
 338                                    target_p->name, cbuf);
 339                 if((source_p == target_p || IsOper(source_p)) &&
 340                                 target_p->certfp != NULL)
 341                         sendto_one_numeric(source_p, RPL_WHOISCERTFP,
 342                                         form_str(RPL_WHOISCERTFP),
 343                                         target_p->name, target_p->certfp);
 344         }
 345
 346         if(MyClient(target_p))
 347         {
 348                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 349                 {
 350                         /* trick here: show a nonoper their own IP if
 351                          * dynamic spoofed but not if auth{} spoofed
 352                          * -- jilles */
 353                         ClearDynSpoof(target_p);
 354                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 355                                            form_str(RPL_WHOISHOST),
 356                                            target_p->name, target_p->orighost,
 357                                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
 358                         SetDynSpoof(target_p);
 359                 }
 360                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
 361                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 362                                            form_str(RPL_WHOISACTUALLY),
 363                                            target_p->name, target_p->sockhost);
 364
 365                 if (GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET6 &&
 366                                 (show_ip(source_p, target_p) ||
 367                                  (source_p == target_p && !IsIPSpoof(target_p))) &&
 368                                 rb_ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4))
 369                 {
 370                         rb_inet_ntop_sock((struct sockaddr *)&ip4,
 371                                         buf, sizeof buf);
 372                         sendto_one_numeric(source_p, RPL_WHOISTEXT,
 373                                         "%s :Underlying IPv4 is %s",
 374                                         target_p->name, buf);
 375                 }
 376
 377                 sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
 378                                    target_p->name,
 379                                    (long)(rb_current_time() - target_p->localClient->last),
 380                                    (unsigned long)target_p->localClient->firsttime);
 381         }
 382         else
 383         {
 384                 if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
 385                 {
 386                         ClearDynSpoof(target_p);
 387                         sendto_one_numeric(source_p, RPL_WHOISHOST,
 388                                            form_str(RPL_WHOISHOST),
 389                                            target_p->name, target_p->orighost,
 390                                            show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
 391                         SetDynSpoof(target_p);
 392                 }
 393                 else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
 394                    !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
 395                 {
 396                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 397                                            form_str(RPL_WHOISACTUALLY),
 398                                            target_p->name, target_p->sockhost);
 399
 400                 }
 401         }
 402
 403         /* doing_whois_hook must only be called for local clients,
 404          * doing_whois_global_hook must only be called for local targets
 405          */
 406         /* it is important that these are called *before* RPL_ENDOFWHOIS is
 407          * sent, services compatibility code depends on it. --anfl
 408          */
 409         if(MyClient(source_p))
 410                 call_hook(doing_whois_hook, &hdata);
 411         else
 412                 call_hook(doing_whois_global_hook, &hdata);
 413 }