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 "hash.h"
  39 #include "match.h"
  40 #include "ircd.h"
  41 #include "numeric.h"
  42 #include "s_serv.h"
  43 #include "s_conf.h"
  44 #include "s_newconf.h"
  45 #include "send.h"
  46 #include "msg.h"
  47 #include "parse.h"
  48 #include "modules.h"
  49 #include "logger.h"
  50 #include "supported.h"
  51
  52 static const char etrace_desc[] =
  53     "Provides enhanced tracing facilities to opers (ETRACE, CHANTRACE, and MASKTRACE)";
  54
  55 static void mo_etrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  56 static void me_etrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  57 static void m_chantrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  58 static void mo_masktrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  59
  60 struct Message etrace_msgtab = {
  61         "ETRACE", 0, 0, 0, 0,
  62         {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, {me_etrace, 0}, {mo_etrace, 0}}
  63 };
  64 struct Message chantrace_msgtab = {
  65         "CHANTRACE", 0, 0, 0, 0,
  66         {mg_ignore, {m_chantrace, 2}, mg_ignore, mg_ignore, mg_ignore, {m_chantrace, 2}}
  67 };
  68 struct Message masktrace_msgtab = {
  69         "MASKTRACE", 0, 0, 0, 0,
  70         {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_masktrace, 2}}
  71 };
  72
  73 static int
  74 _modinit(void)
  75 {
  76     add_isupport("ETRACE", isupport_string, "");
  77
  78     return 0;
  79 }
  80
  81 static void
  82 _moddeinit(void)
  83 {
  84     delete_isupport("ETRACE");
  85 }
  86
  87 mapi_clist_av1 etrace_clist[] = { &etrace_msgtab, &chantrace_msgtab, &masktrace_msgtab, NULL };
  88
  89 DECLARE_MODULE_AV2(etrace, _modinit, _moddeinit, etrace_clist, NULL, NULL, NULL, NULL, etrace_desc);
  90
  91 static void do_etrace(struct Client *source_p, int ipv4, int ipv6);
  92 static void do_etrace_full(struct Client *source_p);
  93 static void do_single_etrace(struct Client *source_p, struct Client *target_p);
  94
  95 static const char *empty_sockhost = "255.255.255.255";
  96 static const char *spoofed_sockhost = "0";
  97
  98 /*
  99  * m_etrace
 100  *      parv[1] = options [or target]
 101  *      parv[2] = [target]
 102  */
 103 static void
 104 mo_etrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 105 {
 106         if(parc > 1 && !EmptyString(parv[1]))
 107         {
 108                 if(!irccmp(parv[1], "-full"))
 109                         do_etrace_full(source_p);
 110                 else if(!irccmp(parv[1], "-v6"))
 111                         do_etrace(source_p, 0, 1);
 112                 else if(!irccmp(parv[1], "-v4"))
 113                         do_etrace(source_p, 1, 0);
 114                 else
 115                 {
 116                         struct Client *target_p = find_named_person(parv[1]);
 117
 118                         if(target_p)
 119                         {
 120                                 if(!MyClient(target_p))
 121                                         sendto_one(target_p, ":%s ENCAP %s ETRACE %s",
 122                                                 get_id(source_p, target_p),
 123                                                 target_p->servptr->name,
 124                                                 get_id(target_p, target_p));
 125                                 else
 126                                 {
 127                                         do_single_etrace(source_p, target_p);
 128                                         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), target_p->name);
 129                                 }
 130                         }
 131                         else
 132                                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 133                                                 form_str(ERR_NOSUCHNICK), parv[1]);
 134                 }
 135         }
 136         else
 137                 do_etrace(source_p, 1, 1);
 138 }
 139
 140 static void
 141 me_etrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 142 {
 143         struct Client *target_p;
 144
 145         if(!IsOper(source_p) || parc < 2 || EmptyString(parv[1]))
 146                 return;
 147
 148         /* we cant etrace remote clients.. we shouldnt even get sent them */
 149         if((target_p = find_person(parv[1])) && MyClient(target_p))
 150                 do_single_etrace(source_p, target_p);
 151
 152         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE),
 153                                 target_p ? target_p->name : parv[1]);
 154 }
 155
 156 static void
 157 do_etrace(struct Client *source_p, int ipv4, int ipv6)
 158 {
 159         struct Client *target_p;
 160         rb_dlink_node *ptr;
 161
 162         /* report all direct connections */
 163         RB_DLINK_FOREACH(ptr, lclient_list.head)
 164         {
 165                 target_p = ptr->data;
 166
 167                 if((!ipv4 && GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET) ||
 168                    (!ipv6 && GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET6))
 169                         continue;
 170
 171                 sendto_one(source_p, form_str(RPL_ETRACE),
 172                            me.name, source_p->name,
 173                            SeesOper(target_p, source_p) ? "Oper" : "User",
 174                            get_client_class(target_p),
 175                            target_p->name, target_p->username, target_p->host,
 176                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255",
 177                            target_p->info);
 178         }
 179
 180         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 181 }
 182
 183 static void
 184 do_etrace_full(struct Client *source_p)
 185 {
 186         rb_dlink_node *ptr;
 187
 188         RB_DLINK_FOREACH(ptr, lclient_list.head)
 189         {
 190                 do_single_etrace(source_p, ptr->data);
 191         }
 192
 193         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 194 }
 195
 196 /*
 197  * do_single_etrace  - searches local clients and displays those matching
 198  *                     a pattern
 199  * input             - source client, target client
 200  * output            - etrace results
 201  * side effects      - etrace results are displayed
 202  */
 203 static void
 204 do_single_etrace(struct Client *source_p, struct Client *target_p)
 205 {
 206         /* note, we hide fullcaps for spoofed users, as mirc can often
 207          * advertise its internal ip address in the field --fl
 208          */
 209         if(!show_ip(source_p, target_p))
 210                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 211                                 me.name, source_p->name,
 212                                 SeesOper(target_p, source_p) ? "Oper" : "User",
 213                                 get_client_class(target_p),
 214                                 target_p->name, target_p->username, target_p->host,
 215                                 "255.255.255.255", "<hidden> <hidden>", target_p->info);
 216         else
 217                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 218                                 me.name, source_p->name,
 219                                 SeesOper(target_p, source_p) ? "Oper" : "User",
 220                                 get_client_class(target_p),
 221                                 target_p->name, target_p->username,
 222                                 target_p->host, target_p->sockhost,
 223                                 target_p->localClient->fullcaps, target_p->info);
 224 }
 225
 226 static void
 227 m_chantrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 228 {
 229         struct Client *target_p;
 230         struct Channel *chptr;
 231         struct membership *msptr;
 232         const char *sockhost;
 233         const char *name;
 234         rb_dlink_node *ptr;
 235         int operspy = 0;
 236
 237         name = parv[1];
 238
 239         if(IsOperSpy(source_p) && parv[1][0] == '!')
 240         {
 241                 name++;
 242                 operspy = 1;
 243
 244                 if(EmptyString(name))
 245                 {
 246                         sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 247                                         me.name, source_p->name, "CHANTRACE");
 248                         return;
 249                 }
 250         }
 251
 252         if((chptr = find_channel(name)) == NULL)
 253         {
 254                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL),
 255                                 name);
 256                 return;
 257         }
 258
 259         /* dont report operspys for nonexistant channels. */
 260         if(operspy)
 261                 report_operspy(source_p, "CHANTRACE", chptr->chname);
 262
 263         if(!operspy && !IsMember(client_p, chptr))
 264         {
 265                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL, form_str(ERR_NOTONCHANNEL),
 266                                 chptr->chname);
 267                 return;
 268         }
 269
 270         RB_DLINK_FOREACH(ptr, chptr->members.head)
 271         {
 272                 msptr = ptr->data;
 273                 target_p = msptr->client_p;
 274
 275                 if(EmptyString(target_p->sockhost))
 276                         sockhost = empty_sockhost;
 277                 else if(!show_ip(source_p, target_p))
 278                         sockhost = spoofed_sockhost;
 279                 else
 280                         sockhost = target_p->sockhost;
 281
 282                 sendto_one(source_p, form_str(RPL_ETRACE),
 283                                 me.name, source_p->name,
 284                                 SeesOper(target_p, source_p) ? "Oper" : "User",
 285                                 /* class field -- pretend its server.. */
 286                                 target_p->servptr->name,
 287                                 target_p->name, target_p->username, target_p->host,
 288                                 sockhost, target_p->info);
 289         }
 290
 291         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 292 }
 293
 294 static void
 295 match_masktrace(struct Client *source_p, rb_dlink_list *list,
 296         const char *username, const char *hostname, const char *name,
 297         const char *gecos)
 298 {
 299         struct Client *target_p;
 300         rb_dlink_node *ptr;
 301         const char *sockhost;
 302
 303         RB_DLINK_FOREACH(ptr, list->head)
 304         {
 305                 target_p = ptr->data;
 306                 if(!IsPerson(target_p))
 307                         continue;
 308
 309                 if(EmptyString(target_p->sockhost))
 310                         sockhost = empty_sockhost;
 311                 else if(!show_ip(source_p, target_p))
 312                         sockhost = spoofed_sockhost;
 313                 else
 314                         sockhost = target_p->sockhost;
 315
 316                 if(match(username, target_p->username) &&
 317                    (match(hostname, target_p->host) ||
 318                     match(hostname, target_p->orighost) ||
 319                     match(hostname, sockhost) || match_ips(hostname, sockhost)))
 320                 {
 321                         if(name != NULL && !match(name, target_p->name))
 322                                 continue;
 323
 324                         if(gecos != NULL && !match_esc(gecos, target_p->info))
 325                                 continue;
 326
 327                         sendto_one(source_p, form_str(RPL_ETRACE),
 328                                 me.name, source_p->name,
 329                                 SeesOper(target_p, source_p) ? "Oper" : "User",
 330                                 /* class field -- pretend its server.. */
 331                                 target_p->servptr->name,
 332                                 target_p->name, target_p->username, target_p->host,
 333                                 sockhost, target_p->info);
 334                 }
 335         }
 336 }
 337
 338 static void
 339 mo_masktrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
 340         const char *parv[])
 341 {
 342         char *name, *username, *hostname, *gecos;
 343         const char *mask;
 344         int operspy = 0;
 345
 346         mask = parv[1];
 347         name = LOCAL_COPY(parv[1]);
 348         collapse(name);
 349
 350         if(IsOperSpy(source_p) && parv[1][0] == '!')
 351         {
 352                 name++;
 353                 mask++;
 354                 operspy = 1;
 355         }
 356
 357         if(parc > 2 && !EmptyString(parv[2]))
 358         {
 359                 gecos = LOCAL_COPY(parv[2]);
 360                 collapse_esc(gecos);
 361         } else
 362                 gecos = NULL;
 363
 364
 365         if((hostname = strchr(name, '@')) == NULL)
 366         {
 367                 sendto_one_notice(source_p, ":Invalid parameters");
 368                 return;
 369         }
 370
 371         *hostname++ = '\0';
 372
 373         if((username = strchr(name, '!')) == NULL)
 374         {
 375                 username = name;
 376                 name = NULL;
 377         } else
 378                 *username++ = '\0';
 379
 380         if(EmptyString(username) || EmptyString(hostname))
 381         {
 382                 sendto_one_notice(source_p, ":Invalid parameters");
 383                 return;
 384         }
 385
 386         if(operspy) {
 387                 if (!ConfigFileEntry.operspy_dont_care_user_info)
 388                 {
 389                         char buf[512];
 390                         rb_strlcpy(buf, mask, sizeof(buf));
 391                         if(!EmptyString(gecos)) {
 392                                 rb_strlcat(buf, " ", sizeof(buf));
 393                                 rb_strlcat(buf, gecos, sizeof(buf));
 394                         }
 395
 396                         report_operspy(source_p, "MASKTRACE", buf);
 397                 }
 398                 match_masktrace(source_p, &global_client_list, username, hostname, name, gecos);
 399         } else
 400                 match_masktrace(source_p, &lclient_list, username, hostname, name, gecos);
 401
 402         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 403 }