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