modules/m_etrace.c

   1 /*
   2  *  ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
   3  *  m_etrace.c: Gives local opers a trace output with added info.
   4  *
   5  *  Copyright (C) 2002-2003 Lee Hardy <lee@leeh.co.uk>
   6  *  Copyright (C) 2002-2005 ircd-ratbox development team
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *  1.Redistributions of source code must retain the above copyright notice,
  13  *    this list of conditions and the following disclaimer.
  14  *  2.Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *  3.The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  *  DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24  *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  *  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  *  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  *  POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include "stdinc.h"
  34 #include "class.h"
  35 #include "hook.h"
  36 #include "client.h"
  37 #include "hash.h"
  38 #include "common.h"
  39 #include "hash.h"
  40 #include "irc_string.h"
  41 #include "ircd.h"
  42 #include "numeric.h"
  43 #include "commio.h"
  44 #include "s_serv.h"
  45 #include "s_conf.h"
  46 #include "s_newconf.h"
  47 #include "send.h"
  48 #include "msg.h"
  49 #include "parse.h"
  50 #include "modules.h"
  51
  52 static int mo_etrace(struct Client *, struct Client *, int, const char **);
  53 static int me_etrace(struct Client *, struct Client *, int, const char **);
  54 static int mo_chantrace(struct Client *, struct Client *, int, const char **);
  55 static int mo_masktrace(struct Client *, struct Client *, int, const char **);
  56
  57 struct Message etrace_msgtab = {
  58         "ETRACE", 0, 0, 0, MFLG_SLOW,
  59         {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, {me_etrace, 0}, {mo_etrace, 0}}
  60 };
  61 struct Message chantrace_msgtab = {
  62         "CHANTRACE", 0, 0, 0, MFLG_SLOW,
  63         {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_chantrace, 2}}
  64 };
  65 struct Message masktrace_msgtab = {
  66         "MASKTRACE", 0, 0, 0, MFLG_SLOW,
  67         {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_masktrace, 2}}
  68 };
  69
  70 mapi_clist_av1 etrace_clist[] = { &etrace_msgtab, &chantrace_msgtab, &masktrace_msgtab, NULL };
  71 DECLARE_MODULE_AV1(etrace, NULL, NULL, etrace_clist, NULL, NULL, "$Revision: 147 $");
  72
  73 static void do_etrace(struct Client *source_p, int ipv4, int ipv6);
  74 static void do_etrace_full(struct Client *source_p);
  75 static void do_single_etrace(struct Client *source_p, struct Client *target_p);
  76
  77 static const char *empty_sockhost = "255.255.255.255";
  78 static const char *spoofed_sockhost = "0";
  79
  80 /*
  81  * m_etrace
  82  *      parv[0] = sender prefix
  83  *      parv[1] = options [or target]
  84  *      parv[2] = [target]
  85  */
  86 static int
  87 mo_etrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  88 {
  89         if(!IsOperRouting(source_p))
  90         {
  91                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name,
  92                                 "routing");
  93                 return 0;
  94         }
  95
  96         if(parc > 1 && !EmptyString(parv[1]))
  97         {
  98                 if(!irccmp(parv[1], "-full"))
  99                         do_etrace_full(source_p);
 100 #ifdef IPV6
 101                 else if(!irccmp(parv[1], "-v6"))
 102                         do_etrace(source_p, 0, 1);
 103                 else if(!irccmp(parv[1], "-v4"))
 104                         do_etrace(source_p, 1, 0);
 105 #endif
 106                 else
 107                 {
 108                         struct Client *target_p = find_named_person(parv[1]);
 109
 110                         if(target_p)
 111                         {
 112                                 if(!MyClient(target_p))
 113                                         sendto_one(target_p, ":%s ENCAP %s ETRACE %s",
 114                                                 get_id(source_p, target_p),
 115                                                 target_p->user->server,
 116                                                 get_id(target_p, target_p));
 117                                 else
 118                                         do_single_etrace(source_p, target_p);
 119                         }
 120                         else
 121                                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 122                                                 form_str(ERR_NOSUCHNICK), parv[1]);
 123                 }
 124         }
 125         else
 126                 do_etrace(source_p, 1, 1);
 127
 128         return 0;
 129 }
 130
 131 static int
 132 me_etrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 133 {
 134         struct Client *target_p;
 135
 136         if(!IsOperRouting(source_p) || parc < 2 || EmptyString(parv[1]))
 137                 return 0;
 138
 139         /* we cant etrace remote clients.. we shouldnt even get sent them */
 140         if((target_p = find_person(parv[1])) && MyClient(target_p))
 141                 do_single_etrace(source_p, target_p);
 142
 143         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE),
 144                                 target_p ? target_p->name : parv[1]);
 145
 146         return 0;
 147 }
 148
 149 static void
 150 do_etrace(struct Client *source_p, int ipv4, int ipv6)
 151 {
 152         struct Client *target_p;
 153         dlink_node *ptr;
 154
 155         /* report all direct connections */
 156         DLINK_FOREACH(ptr, lclient_list.head)
 157         {
 158                 target_p = ptr->data;
 159
 160 #ifdef IPV6
 161                 if((!ipv4 && target_p->localClient->ip.ss_family == AF_INET) ||
 162                    (!ipv6 && target_p->localClient->ip.ss_family == AF_INET6))
 163                         continue;
 164 #endif
 165
 166                 sendto_one(source_p, form_str(RPL_ETRACE),
 167                            me.name, source_p->name,
 168                            IsOper(target_p) ? "Oper" : "User",
 169                            get_client_class(target_p),
 170                            target_p->name, target_p->username, target_p->host,
 171                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255",
 172                            target_p->info);
 173         }
 174
 175         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 176 }
 177
 178 static void
 179 do_etrace_full(struct Client *source_p)
 180 {
 181         dlink_node *ptr;
 182
 183         DLINK_FOREACH(ptr, lclient_list.head)
 184         {
 185                 do_single_etrace(source_p, ptr->data);
 186         }
 187
 188         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 189 }
 190
 191 /*
 192  * do_single_etrace  - searches local clients and displays those matching
 193  *                     a pattern
 194  * input             - source client, target client
 195  * output            - etrace results
 196  * side effects      - etrace results are displayed
 197  */
 198 static void
 199 do_single_etrace(struct Client *source_p, struct Client *target_p)
 200 {
 201         /* note, we hide fullcaps for spoofed users, as mirc can often
 202          * advertise its internal ip address in the field --fl
 203          */
 204         if(!show_ip(source_p, target_p))
 205                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 206                                 me.name, source_p->name,
 207                                 IsOper(target_p) ? "Oper" : "User",
 208                                 get_client_class(target_p),
 209                                 target_p->name, target_p->username, target_p->host,
 210                                 "255.255.255.255", "<hidden> <hidden>", target_p->info);
 211         else
 212                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 213                                 me.name, source_p->name,
 214                                 IsOper(target_p) ? "Oper" : "User",
 215                                 get_client_class(target_p),
 216                                 target_p->name, target_p->username,
 217                                 target_p->host, target_p->sockhost,
 218                                 target_p->localClient->fullcaps, target_p->info);
 219 }
 220
 221 static int
 222 mo_chantrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 223 {
 224         struct Client *target_p;
 225         struct Channel *chptr;
 226         struct membership *msptr;
 227         const char *sockhost;
 228         const char *name;
 229         dlink_node *ptr;
 230         int auspex = 0;
 231
 232         name = parv[1];
 233
 234         if(IsAuspex(source_p))
 235         {
 236                 auspex = 1;
 237
 238                 if(EmptyString(name))
 239                 {
 240                         sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 241                                         me.name, source_p->name, "CHANTRACE");
 242                         return 0;
 243                 }
 244         }
 245
 246         if((chptr = find_channel(name)) == NULL)
 247         {
 248                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL),
 249                                 name);
 250                 return 0;
 251         }
 252
 253         if(!auspex && !IsMember(client_p, chptr))
 254         {
 255                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL, form_str(ERR_NOTONCHANNEL),
 256                                 chptr->chname);
 257                 return 0;
 258         }
 259
 260         DLINK_FOREACH(ptr, chptr->members.head)
 261         {
 262                 msptr = ptr->data;
 263                 target_p = msptr->client_p;
 264
 265                 if(EmptyString(target_p->sockhost))
 266                         sockhost = empty_sockhost;
 267                 else if(!show_ip(source_p, target_p))
 268                         sockhost = spoofed_sockhost;
 269                 else
 270                         sockhost = target_p->sockhost;
 271
 272                 sendto_one(source_p, form_str(RPL_ETRACE),
 273                                 me.name, source_p->name,
 274                                 IsOper(target_p) ? "Oper" : "User",
 275                                 /* class field -- pretend its server.. */
 276                                 target_p->servptr->name,
 277                                 target_p->name, target_p->username, target_p->host,
 278                                 sockhost, target_p->info);
 279         }
 280
 281         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 282         return 0;
 283 }
 284
 285 static void
 286 match_masktrace(struct Client *source_p, dlink_list *list,
 287         const char *username, const char *hostname, const char *name,
 288         const char *gecos)
 289 {
 290         struct Client *target_p;
 291         dlink_node *ptr;
 292         const char *sockhost;
 293         char *mangle_gecos = NULL;
 294
 295         if(gecos != NULL)
 296         {
 297                 if(strstr(gecos, "\\s"))
 298                 {
 299                         char *tmp = LOCAL_COPY(gecos);
 300                         char *orig = tmp;
 301                         char *new = tmp;
 302                         while(*orig)
 303                         {
 304                                 if(*orig == '\\')
 305                                 {
 306                                         if(*(orig + 1) == 's')
 307                                         {
 308                                                 *new++ = ' ';
 309                                                 orig += 2;
 310                                         }
 311                                         /* otherwise skip that and the escaped
 312                                          * character after it, so we dont mistake
 313                                          * \\s as \s --fl
 314                                          */
 315                                         else
 316                                         {
 317                                                 *new++ = *orig++;
 318                                                 *new++ = *orig++;
 319                                         }
 320                                 }
 321                                 else
 322                                         *new++ = *orig++;
 323                         }
 324
 325                         *new = '\0';
 326                         mangle_gecos = LOCAL_COPY(tmp);
 327                 }
 328                 else
 329                         mangle_gecos = LOCAL_COPY(gecos);
 330         }
 331
 332         DLINK_FOREACH(ptr, list->head)
 333         {
 334                 target_p = ptr->data;
 335                 if(!IsPerson(target_p))
 336                         continue;
 337
 338                 if(EmptyString(target_p->sockhost))
 339                         sockhost = empty_sockhost;
 340                 else if(!show_ip(source_p, target_p))
 341                         sockhost = spoofed_sockhost;
 342                 else
 343                         sockhost = target_p->sockhost;
 344
 345                 if(match(username, target_p->username) &&
 346                    (match(hostname, target_p->host) ||
 347                     match(hostname, target_p->orighost) ||
 348                     match(hostname, sockhost) || match_ips(hostname, sockhost)))
 349                 {
 350                         if(name != NULL && !match(name, target_p->name))
 351                                 continue;
 352
 353                         if(mangle_gecos != NULL && !match_esc(mangle_gecos, target_p->info))
 354                                 continue;
 355
 356                         sendto_one(source_p, form_str(RPL_ETRACE),
 357                                 me.name, source_p->name,
 358                                 IsOper(target_p) ? "Oper" : "User",
 359                                 /* class field -- pretend its server.. */
 360                                 target_p->servptr->name,
 361                                 target_p->name, target_p->username, target_p->host,
 362                                 sockhost, target_p->info);
 363                 }
 364         }
 365 }
 366
 367 static int
 368 mo_masktrace(struct Client *client_p, struct Client *source_p, int parc,
 369         const char *parv[])
 370 {
 371         char *name, *username, *hostname, *gecos;
 372         const char *mask;
 373         int auspex = 0;
 374
 375         mask = parv[1];
 376         name = LOCAL_COPY(parv[1]);
 377         collapse(name);
 378
 379         if(IsAuspex(source_p))
 380         {
 381                 auspex = 1;
 382         }
 383
 384         if(parc > 2 && !EmptyString(parv[2]))
 385         {
 386                 gecos = LOCAL_COPY(parv[2]);
 387                 collapse_esc(gecos);
 388         } else
 389                 gecos = NULL;
 390
 391
 392         if((hostname = strchr(name, '@')) == NULL)
 393         {
 394                 sendto_one(source_p, ":%s NOTICE %s :Invalid parameters", me.name, source_p->name);
 395                 return 0;
 396         }
 397
 398         *hostname++ = '\0';
 399
 400         if((username = strchr(name, '!')) == NULL)
 401         {
 402                 username = name;
 403                 name = NULL;
 404         } else
 405                 *username++ = '\0';
 406
 407         if(EmptyString(username) || EmptyString(hostname))
 408         {
 409                 sendto_one(source_p, ":%s NOTICE %s :Invalid parameters", me.name, source_p->name);
 410                 return 0;
 411         }
 412
 413         if(auspex) {
 414                 match_masktrace(source_p, &global_client_list, username, hostname, name, gecos);
 415         } else
 416                 match_masktrace(source_p, &lclient_list, username, hostname, name, gecos);
 417
 418         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 419         return 0;
 420 }