modules/m_trace.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_trace.c: Traces a path to a client/server.
   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_trace.c 147 2006-11-13 12:35:45Z spb $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "class.h"
  29 #include "hook.h"
  30 #include "client.h"
  31 #include "hash.h"
  32 #include "common.h"
  33 #include "hash.h"
  34 #include "irc_string.h"
  35 #include "ircd.h"
  36 #include "numeric.h"
  37 #include "commio.h"
  38 #include "s_serv.h"
  39 #include "s_conf.h"
  40 #include "s_newconf.h"
  41 #include "send.h"
  42 #include "msg.h"
  43 #include "parse.h"
  44 #include "modules.h"
  45
  46 static int m_trace(struct Client *, struct Client *, int, const char **);
  47
  48 struct Message trace_msgtab = {
  49         "TRACE", 0, 0, 0, MFLG_SLOW,
  50         {mg_unreg, {m_trace, 0}, {m_trace, 0}, mg_ignore, mg_ignore, {m_trace, 0}}
  51 };
  52
  53 int doing_trace_hook;
  54
  55 mapi_clist_av1 trace_clist[] = { &trace_msgtab, NULL };
  56 mapi_hlist_av1 trace_hlist[] = {
  57         { "doing_trace",        &doing_trace_hook },
  58         { NULL, NULL }
  59 };
  60 DECLARE_MODULE_AV1(trace, NULL, NULL, trace_clist, trace_hlist, NULL, "$Revision: 147 $");
  61
  62 static void count_downlinks(struct Client *server_p, int *pservcount, int *pusercount);
  63 static int report_this_status(struct Client *source_p, struct Client *target_p, int dow);
  64
  65 /*
  66  * m_trace
  67  *      parv[0] = sender prefix
  68  *      parv[1] = servername
  69  */
  70 static int
  71 m_trace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  72 {
  73         struct Client *target_p = NULL;
  74         struct Class *cltmp;
  75         const char *tname;
  76         int doall = 0;
  77         int cnt = 0, wilds, dow;
  78         dlink_node *ptr;
  79
  80         if(parc > 1)
  81         {
  82                 tname = parv[1];
  83
  84                 if(parc > 2)
  85                 {
  86                         if(hunt_server(client_p, source_p, ":%s TRACE %s :%s", 2, parc, parv) !=
  87                                         HUNTED_ISME)
  88                                 return 0;
  89                 }
  90         }
  91         else
  92                 tname = me.name;
  93
  94         /* if we have 3 parameters, then the command is directed at us.  So
  95          * we shouldnt be forwarding it anywhere.
  96          */
  97         if(parc < 3)
  98         {
  99                 switch (hunt_server(client_p, source_p, ":%s TRACE :%s", 1, parc, parv))
 100                 {
 101                 case HUNTED_PASS:       /* note: gets here only if parv[1] exists */
 102                 {
 103                         struct Client *ac2ptr;
 104
 105                         if(MyClient(source_p))
 106                                 ac2ptr = find_named_client(tname);
 107                         else
 108                                 ac2ptr = find_client(tname);
 109
 110                         if(ac2ptr == NULL)
 111                         {
 112                                 DLINK_FOREACH(ptr, global_client_list.head)
 113                                 {
 114                                         ac2ptr = ptr->data;
 115
 116                                         if(match(tname, ac2ptr->name) || match(ac2ptr->name, tname))
 117                                                 break;
 118                                         else
 119                                                 ac2ptr = NULL;
 120                                 }
 121                         }
 122
 123                         /* giving this out with flattened links defeats the
 124                          * object --fl
 125                          */
 126                         if(IsOperRouting(source_p) || IsExemptShide(source_p) ||
 127                            !ConfigServerHide.flatten_links)
 128                                 sendto_one_numeric(source_p, RPL_TRACELINK,
 129                                                    form_str(RPL_TRACELINK),
 130                                                    ircd_version,
 131                                                    ac2ptr ? ac2ptr->name : tname,
 132                                                    ac2ptr ? ac2ptr->from->name : "EEK!");
 133
 134                         return 0;
 135                 }
 136
 137                 case HUNTED_ISME:
 138                         break;
 139
 140                 default:
 141                         return 0;
 142                 }
 143         }
 144
 145         if(match(tname, me.name))
 146         {
 147                 doall = 1;
 148         }
 149         /* if theyre tracing our SID, we need to move tname to our name so
 150          * we dont give the sid in ENDOFTRACE
 151          */
 152         else if(!MyClient(source_p) && !strcmp(tname, me.id))
 153         {
 154                 doall = 1;
 155                 tname = me.name;
 156         }
 157
 158         wilds = strchr(tname, '*') || strchr(tname, '?');
 159         dow = wilds || doall;
 160
 161         /* specific trace */
 162         if(dow == 0)
 163         {
 164                 if(MyClient(source_p) || parc > 2)
 165                         target_p = find_named_person(tname);
 166                 else
 167                         target_p = find_person(tname);
 168
 169                 /* tname could be pointing to an ID at this point, so reset
 170                  * it to target_p->name if we have a target --fl
 171                  */
 172                 if(target_p != NULL)
 173                 {
 174                         report_this_status(source_p, target_p, 0);
 175                         tname = target_p->name;
 176                 }
 177
 178                 sendto_one_numeric(source_p, RPL_ENDOFTRACE,
 179                                    form_str(RPL_ENDOFTRACE), tname);
 180                 return 0;
 181         }
 182
 183         /* give non-opers a limited trace output of themselves (if local),
 184          * opers and servers (if no shide) --fl
 185          */
 186         if(!IsOperRouting(source_p))
 187         {
 188                 if(MyClient(source_p))
 189                 {
 190                         if(doall || (wilds && match(tname, source_p->name)))
 191                                 report_this_status(source_p, source_p, 0);
 192                 }
 193
 194                 DLINK_FOREACH(ptr, local_oper_list.head)
 195                 {
 196                         target_p = ptr->data;
 197
 198                         if(!doall && wilds && (match(tname, target_p->name) == 0))
 199                                 continue;
 200
 201                         report_this_status(source_p, target_p, 0);
 202                 }
 203
 204                 if (IsExemptShide(source_p) || !ConfigServerHide.flatten_links)
 205                 {
 206                         DLINK_FOREACH(ptr, serv_list.head)
 207                         {
 208                                 target_p = ptr->data;
 209
 210                                 if(!doall && wilds && !match(tname, target_p->name))
 211                                         continue;
 212
 213                                 report_this_status(source_p, target_p, 0);
 214                         }
 215                 }
 216
 217                 sendto_one_numeric(source_p, RPL_ENDOFTRACE,
 218                                    form_str(RPL_ENDOFTRACE), tname);
 219                 return 0;
 220         }
 221
 222         /* source_p is opered */
 223
 224         /* report all direct connections */
 225         DLINK_FOREACH(ptr, lclient_list.head)
 226         {
 227                 target_p = ptr->data;
 228
 229                 /* dont show invisible users to remote opers */
 230                 if(IsInvisible(target_p) && dow && !MyConnect(source_p) && !IsOper(target_p))
 231                         continue;
 232
 233                 if(!doall && wilds && !match(tname, target_p->name))
 234                         continue;
 235
 236                 cnt = report_this_status(source_p, target_p, dow);
 237         }
 238
 239         DLINK_FOREACH(ptr, serv_list.head)
 240         {
 241                 target_p = ptr->data;
 242
 243                 if(!doall && wilds && !match(tname, target_p->name))
 244                         continue;
 245
 246                 cnt = report_this_status(source_p, target_p, dow);
 247         }
 248
 249         if(MyConnect(source_p))
 250         {
 251                 DLINK_FOREACH(ptr, unknown_list.head)
 252                 {
 253                         target_p = ptr->data;
 254
 255                         if(!doall && wilds && !match(tname, target_p->name))
 256                                 continue;
 257
 258                         cnt = report_this_status(source_p, target_p, dow);
 259                 }
 260         }
 261
 262         if(!cnt)
 263         {
 264                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER),
 265                                         tname);
 266
 267                 /* let the user have some idea that its at the end of the
 268                  * trace
 269                  */
 270                 sendto_one_numeric(source_p, RPL_ENDOFTRACE,
 271                                    form_str(RPL_ENDOFTRACE), tname);
 272                 return 0;
 273         }
 274
 275         if(doall)
 276         {
 277                 DLINK_FOREACH(ptr, class_list.head)
 278                 {
 279                         cltmp = ptr->data;
 280
 281                         if(CurrUsers(cltmp) > 0)
 282                                 sendto_one_numeric(source_p, RPL_TRACECLASS,
 283                                                    form_str(RPL_TRACECLASS),
 284                                                    ClassName(cltmp), CurrUsers(cltmp));
 285                 }
 286         }
 287
 288         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), tname);
 289
 290         return 0;
 291 }
 292
 293 /*
 294  * count_downlinks
 295  *
 296  * inputs       - pointer to server to count
 297  *              - pointers to server and user count
 298  * output       - NONE
 299  * side effects - server and user counts are added to given values
 300  */
 301 static void
 302 count_downlinks(struct Client *server_p, int *pservcount, int *pusercount)
 303 {
 304         dlink_node *ptr;
 305
 306         (*pservcount)++;
 307         *pusercount += dlink_list_length(&server_p->serv->users);
 308         DLINK_FOREACH(ptr, server_p->serv->servers.head)
 309         {
 310                 count_downlinks(ptr->data, pservcount, pusercount);
 311         }
 312 }
 313
 314 /*
 315  * report_this_status
 316  *
 317  * inputs       - pointer to client to report to
 318  *              - pointer to client to report about
 319  * output       - counter of number of hits
 320  * side effects - NONE
 321  */
 322 static int
 323 report_this_status(struct Client *source_p, struct Client *target_p,
 324                    int dow)
 325 {
 326         const char *name;
 327         const char *class_name;
 328         char ip[HOSTIPLEN];
 329         int cnt = 0;
 330
 331         /* sanity check - should never happen */
 332         if(!MyConnect(target_p))
 333                 return 0;
 334
 335         inetntop_sock((struct sockaddr *)&target_p->localClient->ip, ip, sizeof(ip));
 336         class_name = get_client_class(target_p);
 337
 338         if(IsAnyServer(target_p))
 339                 name = get_server_name(target_p, HIDE_IP);
 340         else
 341                 name = get_client_name(target_p, HIDE_IP);
 342
 343         switch (target_p->status)
 344         {
 345         case STAT_CONNECTING:
 346                 sendto_one_numeric(source_p, RPL_TRACECONNECTING,
 347                                 form_str(RPL_TRACECONNECTING),
 348                                 class_name, name);
 349                 cnt++;
 350                 break;
 351
 352         case STAT_HANDSHAKE:
 353                 sendto_one_numeric(source_p, RPL_TRACEHANDSHAKE,
 354                                 form_str(RPL_TRACEHANDSHAKE),
 355                                 class_name, name);
 356                 cnt++;
 357                 break;
 358
 359         case STAT_ME:
 360                 break;
 361
 362         case STAT_UNKNOWN:
 363                 /* added time -Taner */
 364                 sendto_one_numeric(source_p, RPL_TRACEUNKNOWN,
 365                                    form_str(RPL_TRACEUNKNOWN),
 366                                    class_name, name, ip,
 367                                    CurrentTime - target_p->localClient->firsttime);
 368                 cnt++;
 369                 break;
 370
 371         case STAT_CLIENT:
 372                 /* Only opers see users if there is a wildcard
 373                  * but anyone can see all the opers.
 374                  */
 375                 if((IsOper(source_p) &&
 376                     (MyClient(source_p) || !(dow && IsInvisible(target_p))))
 377                    || !dow || IsOper(target_p) || (source_p == target_p))
 378                 {
 379                         if(IsOper(target_p))
 380                                 sendto_one_numeric(source_p, RPL_TRACEOPERATOR,
 381                                                    form_str(RPL_TRACEOPERATOR),
 382                                                    class_name, name,
 383                                                    show_ip(source_p, target_p) ? ip : "255.255.255.255",
 384                                                    CurrentTime - target_p->localClient->lasttime,
 385                                                    CurrentTime - target_p->localClient->last);
 386
 387                         else
 388                                 sendto_one_numeric(source_p, RPL_TRACEUSER,
 389                                                    form_str(RPL_TRACEUSER),
 390                                                    class_name, name,
 391                                                    show_ip(source_p, target_p) ? ip : "255.255.255.255",
 392                                                    CurrentTime - target_p->localClient->lasttime,
 393                                                    CurrentTime - target_p->localClient->last);
 394                         cnt++;
 395                 }
 396                 break;
 397
 398         case STAT_SERVER:
 399                 {
 400                         int usercount = 0;
 401                         int servcount = 0;
 402
 403                         count_downlinks(target_p, &servcount, &usercount);
 404
 405                         sendto_one_numeric(source_p, RPL_TRACESERVER, form_str(RPL_TRACESERVER),
 406                                    class_name, servcount, usercount, name,
 407                                    *(target_p->serv->by) ? target_p->serv->by : "*", "*",
 408                                    me.name, CurrentTime - target_p->localClient->lasttime);
 409                         cnt++;
 410
 411                 }
 412                 break;
 413
 414         default:                /* ...we actually shouldn't come here... --msa */
 415                 sendto_one_numeric(source_p, RPL_TRACENEWTYPE,
 416                                    form_str(RPL_TRACENEWTYPE),
 417                                    me.name, source_p->name, name);
 418                 cnt++;
 419                 break;
 420         }
 421
 422         return (cnt);
 423 }