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  *  $Id: m_etrace.c 3161 2007-01-25 07:23:01Z nenolod $
  33  */
  34
  35 #include "stdinc.h"
  36 #include "class.h"
  37 #include "hook.h"
  38 #include "client.h"
  39 #include "hash.h"
  40 #include "common.h"
  41 #include "hash.h"
  42 #include "match.h"
  43 #include "ircd.h"
  44 #include "numeric.h"
  45 #include "s_serv.h"
  46 #include "s_conf.h"
  47 #include "s_newconf.h"
  48 #include "send.h"
  49 #include "msg.h"
  50 #include "parse.h"
  51 #include "modules.h"
  52 #include "logger.h"
  53 #include "supported.h"
  54
  55 static int mo_etrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  56 static int me_etrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  57 static int m_chantrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  58 static int 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 DECLARE_MODULE_AV1(etrace, _modinit, _moddeinit, etrace_clist, NULL, NULL, "$Revision: 3161 $");
  89
  90 static void do_etrace(struct Client *source_p, int ipv4, int ipv6);
  91 static void do_etrace_full(struct Client *source_p);
  92 static void do_single_etrace(struct Client *source_p, struct Client *target_p);
  93
  94 static const char *empty_sockhost = "255.255.255.255";
  95 static const char *spoofed_sockhost = "0";
  96
  97 /*
  98  * m_etrace
  99  *      parv[1] = options [or target]
 100  *      parv[2] = [target]
 101  */
 102 static int
 103 mo_etrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 104 {
 105         if(parc > 1 && !EmptyString(parv[1]))
 106         {
 107                 if(!irccmp(parv[1], "-full"))
 108                         do_etrace_full(source_p);
 109 #ifdef RB_IPV6
 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 #endif
 115                 else
 116                 {
 117                         struct Client *target_p = find_named_person(parv[1]);
 118
 119                         if(target_p)
 120                         {
 121                                 if(!MyClient(target_p))
 122                                         sendto_one(target_p, ":%s ENCAP %s ETRACE %s",
 123                                                 get_id(source_p, target_p),
 124                                                 target_p->servptr->name,
 125                                                 get_id(target_p, target_p));
 126                                 else
 127                                         do_single_etrace(source_p, target_p);
 128                         }
 129                         else
 130                                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 131                                                 form_str(ERR_NOSUCHNICK), parv[1]);
 132                 }
 133         }
 134         else
 135                 do_etrace(source_p, 1, 1);
 136
 137         return 0;
 138 }
 139
 140 static int
 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 0;
 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         return 0;
 156 }
 157
 158 static void
 159 do_etrace(struct Client *source_p, int ipv4, int ipv6)
 160 {
 161         struct Client *target_p;
 162         rb_dlink_node *ptr;
 163
 164         /* report all direct connections */
 165         RB_DLINK_FOREACH(ptr, lclient_list.head)
 166         {
 167                 target_p = ptr->data;
 168
 169 #ifdef RB_IPV6
 170                 if((!ipv4 && target_p->localClient->ip.ss_family == AF_INET) ||
 171                    (!ipv6 && target_p->localClient->ip.ss_family == AF_INET6))
 172                         continue;
 173 #endif
 174
 175                 sendto_one(source_p, form_str(RPL_ETRACE),
 176                            me.name, source_p->name,
 177                            IsOper(target_p) ? "Oper" : "User",
 178                            get_client_class(target_p),
 179                            target_p->name, target_p->username, target_p->host,
 180                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255",
 181                            target_p->info);
 182         }
 183
 184         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 185 }
 186
 187 static void
 188 do_etrace_full(struct Client *source_p)
 189 {
 190         rb_dlink_node *ptr;
 191
 192         RB_DLINK_FOREACH(ptr, lclient_list.head)
 193         {
 194                 do_single_etrace(source_p, ptr->data);
 195         }
 196
 197         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 198 }
 199
 200 /*
 201  * do_single_etrace  - searches local clients and displays those matching
 202  *                     a pattern
 203  * input             - source client, target client
 204  * output            - etrace results
 205  * side effects      - etrace results are displayed
 206  */
 207 static void
 208 do_single_etrace(struct Client *source_p, struct Client *target_p)
 209 {
 210         /* note, we hide fullcaps for spoofed users, as mirc can often
 211          * advertise its internal ip address in the field --fl
 212          */
 213         if(!show_ip(source_p, target_p))
 214                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 215                                 me.name, source_p->name,
 216                                 IsOper(target_p) ? "Oper" : "User",
 217                                 get_client_class(target_p),
 218                                 target_p->name, target_p->username, target_p->host,
 219                                 "255.255.255.255", "<hidden> <hidden>", target_p->info);
 220         else
 221                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 222                                 me.name, source_p->name,
 223                                 IsOper(target_p) ? "Oper" : "User",
 224                                 get_client_class(target_p),
 225                                 target_p->name, target_p->username,
 226                                 target_p->host, target_p->sockhost,
 227                                 target_p->localClient->fullcaps, target_p->info);
 228 }
 229
 230 static int
 231 m_chantrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 232 {
 233         struct Client *target_p;
 234         struct Channel *chptr;
 235         struct membership *msptr;
 236         const char *sockhost;
 237         const char *name;
 238         rb_dlink_node *ptr;
 239         int operspy = 0;
 240
 241         name = parv[1];
 242
 243         if(IsOperSpy(source_p) && parv[1][0] == '!')
 244         {
 245                 name++;
 246                 operspy = 1;
 247
 248                 if(EmptyString(name))
 249                 {
 250                         sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 251                                         me.name, source_p->name, "CHANTRACE");
 252                         return 0;
 253                 }
 254         }
 255
 256         if((chptr = find_channel(name)) == NULL)
 257         {
 258                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL),
 259                                 name);
 260                 return 0;
 261         }
 262
 263         /* dont report operspys for nonexistant channels. */
 264         if(operspy)
 265                 report_operspy(source_p, "CHANTRACE", chptr->chname);
 266
 267         if(!operspy && !IsMember(client_p, chptr))
 268         {
 269                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL, form_str(ERR_NOTONCHANNEL),
 270                                 chptr->chname);
 271                 return 0;
 272         }
 273
 274         RB_DLINK_FOREACH(ptr, chptr->members.head)
 275         {
 276                 msptr = ptr->data;
 277                 target_p = msptr->client_p;
 278
 279                 if(EmptyString(target_p->sockhost))
 280                         sockhost = empty_sockhost;
 281                 else if(!show_ip(source_p, target_p))
 282                         sockhost = spoofed_sockhost;
 283                 else
 284                         sockhost = target_p->sockhost;
 285
 286                 sendto_one(source_p, form_str(RPL_ETRACE),
 287                                 me.name, source_p->name,
 288                                 IsOper(target_p) ? "Oper" : "User",
 289                                 /* class field -- pretend its server.. */
 290                                 target_p->servptr->name,
 291                                 target_p->name, target_p->username, target_p->host,
 292                                 sockhost, target_p->info);
 293         }
 294
 295         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 296         return 0;
 297 }
 298
 299 static void
 300 match_masktrace(struct Client *source_p, rb_dlink_list *list,
 301         const char *username, const char *hostname, const char *name,
 302         const char *gecos)
 303 {
 304         struct Client *target_p;
 305         rb_dlink_node *ptr;
 306         const char *sockhost;
 307
 308         RB_DLINK_FOREACH(ptr, list->head)
 309         {
 310                 target_p = ptr->data;
 311                 if(!IsPerson(target_p))
 312                         continue;
 313
 314                 if(EmptyString(target_p->sockhost))
 315                         sockhost = empty_sockhost;
 316                 else if(!show_ip(source_p, target_p))
 317                         sockhost = spoofed_sockhost;
 318                 else
 319                         sockhost = target_p->sockhost;
 320
 321                 if(match(username, target_p->username) &&
 322                    (match(hostname, target_p->host) ||
 323                     match(hostname, target_p->orighost) ||
 324                     match(hostname, sockhost) || match_ips(hostname, sockhost)))
 325                 {
 326                         if(name != NULL && !match(name, target_p->name))
 327                                 continue;
 328
 329                         if(gecos != NULL && !match_esc(gecos, target_p->info))
 330                                 continue;
 331
 332                         sendto_one(source_p, form_str(RPL_ETRACE),
 333                                 me.name, source_p->name,
 334                                 IsOper(target_p) ? "Oper" : "User",
 335                                 /* class field -- pretend its server.. */
 336                                 target_p->servptr->name,
 337                                 target_p->name, target_p->username, target_p->host,
 338                                 sockhost, target_p->info);
 339                 }
 340         }
 341 }
 342
 343 static int
 344 mo_masktrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
 345         const char *parv[])
 346 {
 347         char *name, *username, *hostname, *gecos;
 348         const char *mask;
 349         int operspy = 0;
 350
 351         mask = parv[1];
 352         name = LOCAL_COPY(parv[1]);
 353         collapse(name);
 354
 355         if(IsOperSpy(source_p) && parv[1][0] == '!')
 356         {
 357                 name++;
 358                 mask++;
 359                 operspy = 1;
 360         }
 361
 362         if(parc > 2 && !EmptyString(parv[2]))
 363         {
 364                 gecos = LOCAL_COPY(parv[2]);
 365                 collapse_esc(gecos);
 366         } else
 367                 gecos = NULL;
 368
 369
 370         if((hostname = strchr(name, '@')) == NULL)
 371         {
 372                 sendto_one_notice(source_p, ":Invalid parameters");
 373                 return 0;
 374         }
 375
 376         *hostname++ = '\0';
 377
 378         if((username = strchr(name, '!')) == NULL)
 379         {
 380                 username = name;
 381                 name = NULL;
 382         } else
 383                 *username++ = '\0';
 384
 385         if(EmptyString(username) || EmptyString(hostname))
 386         {
 387                 sendto_one_notice(source_p, ":Invalid parameters");
 388                 return 0;
 389         }
 390
 391         if(operspy) {
 392                 if (!ConfigFileEntry.operspy_dont_care_user_info)
 393                 {
 394                         char buf[512];
 395                         rb_strlcpy(buf, mask, sizeof(buf));
 396                         if(!EmptyString(gecos)) {
 397                                 rb_strlcat(buf, " ", sizeof(buf));
 398                                 rb_strlcat(buf, gecos, sizeof(buf));
 399                         }
 400
 401                         report_operspy(source_p, "MASKTRACE", buf);
 402                 }
 403                 match_masktrace(source_p, &global_client_list, username, hostname, name, gecos);
 404         } else
 405                 match_masktrace(source_p, &lclient_list, username, hostname, name, gecos);
 406
 407         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 408         return 0;
 409 }