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
  34 #include "stdinc.h"
  35 #include "class.h"
  36 #include "hook.h"
  37 #include "client.h"
  38 #include "hash.h"
  39 #include "common.h"
  40 #include "hash.h"
  41 #include "match.h"
  42 #include "ircd.h"
  43 #include "numeric.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 m_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, {m_chantrace, 2}, mg_ignore, mg_ignore, mg_ignore, {m_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: 3161 $");
  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[1] = options [or target]
  83  *      parv[2] = [target]
  84  */
  85 static int
  86 mo_etrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  87 {
  88         if(parc > 1 && !EmptyString(parv[1]))
  89         {
  90                 if(!irccmp(parv[1], "-full"))
  91                         do_etrace_full(source_p);
  92 #ifdef RB_IPV6
  93                 else if(!irccmp(parv[1], "-v6"))
  94                         do_etrace(source_p, 0, 1);
  95                 else if(!irccmp(parv[1], "-v4"))
  96                         do_etrace(source_p, 1, 0);
  97 #endif
  98                 else
  99                 {
 100                         struct Client *target_p = find_named_person(parv[1]);
 101
 102                         if(target_p)
 103                         {
 104                                 if(!MyClient(target_p))
 105                                         sendto_one(target_p, ":%s ENCAP %s ETRACE %s",
 106                                                 get_id(source_p, target_p),
 107                                                 target_p->servptr->name,
 108                                                 get_id(target_p, target_p));
 109                                 else
 110                                         do_single_etrace(source_p, target_p);
 111                         }
 112                         else
 113                                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 114                                                 form_str(ERR_NOSUCHNICK), parv[1]);
 115                 }
 116         }
 117         else
 118                 do_etrace(source_p, 1, 1);
 119
 120         return 0;
 121 }
 122
 123 static int
 124 me_etrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 125 {
 126         struct Client *target_p;
 127
 128         if(!IsOper(source_p) || parc < 2 || EmptyString(parv[1]))
 129                 return 0;
 130
 131         /* we cant etrace remote clients.. we shouldnt even get sent them */
 132         if((target_p = find_person(parv[1])) && MyClient(target_p))
 133                 do_single_etrace(source_p, target_p);
 134
 135         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE),
 136                                 target_p ? target_p->name : parv[1]);
 137
 138         return 0;
 139 }
 140
 141 static void
 142 do_etrace(struct Client *source_p, int ipv4, int ipv6)
 143 {
 144         struct Client *target_p;
 145         rb_dlink_node *ptr;
 146
 147         /* report all direct connections */
 148         RB_DLINK_FOREACH(ptr, lclient_list.head)
 149         {
 150                 target_p = ptr->data;
 151
 152 #ifdef RB_IPV6
 153                 if((!ipv4 && target_p->localClient->ip.ss_family == AF_INET) ||
 154                    (!ipv6 && target_p->localClient->ip.ss_family == AF_INET6))
 155                         continue;
 156 #endif
 157
 158                 sendto_one(source_p, form_str(RPL_ETRACE),
 159                            me.name, source_p->name,
 160                            IsOper(target_p) ? "Oper" : "User",
 161                            get_client_class(target_p),
 162                            target_p->name, target_p->username, target_p->host,
 163                            show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255",
 164                            target_p->info);
 165         }
 166
 167         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 168 }
 169
 170 static void
 171 do_etrace_full(struct Client *source_p)
 172 {
 173         rb_dlink_node *ptr;
 174
 175         RB_DLINK_FOREACH(ptr, lclient_list.head)
 176         {
 177                 do_single_etrace(source_p, ptr->data);
 178         }
 179
 180         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 181 }
 182
 183 /*
 184  * do_single_etrace  - searches local clients and displays those matching
 185  *                     a pattern
 186  * input             - source client, target client
 187  * output            - etrace results
 188  * side effects      - etrace results are displayed
 189  */
 190 static void
 191 do_single_etrace(struct Client *source_p, struct Client *target_p)
 192 {
 193         /* note, we hide fullcaps for spoofed users, as mirc can often
 194          * advertise its internal ip address in the field --fl
 195          */
 196         if(!show_ip(source_p, target_p))
 197                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 198                                 me.name, source_p->name,
 199                                 IsOper(target_p) ? "Oper" : "User",
 200                                 get_client_class(target_p),
 201                                 target_p->name, target_p->username, target_p->host,
 202                                 "255.255.255.255", "<hidden> <hidden>", target_p->info);
 203         else
 204                 sendto_one(source_p, form_str(RPL_ETRACEFULL),
 205                                 me.name, source_p->name,
 206                                 IsOper(target_p) ? "Oper" : "User",
 207                                 get_client_class(target_p),
 208                                 target_p->name, target_p->username,
 209                                 target_p->host, target_p->sockhost,
 210                                 target_p->localClient->fullcaps, target_p->info);
 211 }
 212
 213 static int
 214 m_chantrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 215 {
 216         struct Client *target_p;
 217         struct Channel *chptr;
 218         struct membership *msptr;
 219         const char *sockhost;
 220         const char *name;
 221         rb_dlink_node *ptr;
 222         int operspy = 0;
 223
 224         name = parv[1];
 225
 226         if(IsOperSpy(source_p) && parv[1][0] == '!')
 227         {
 228                 name++;
 229                 operspy = 1;
 230
 231                 if(EmptyString(name))
 232                 {
 233                         sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 234                                         me.name, source_p->name, "CHANTRACE");
 235                         return 0;
 236                 }
 237         }
 238
 239         if((chptr = find_channel(name)) == NULL)
 240         {
 241                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL),
 242                                 name);
 243                 return 0;
 244         }
 245
 246         /* dont report operspys for nonexistant channels. */
 247         if(operspy)
 248                 report_operspy(source_p, "CHANTRACE", chptr->chname);
 249
 250         if(!operspy && !IsMember(client_p, chptr))
 251         {
 252                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL, form_str(ERR_NOTONCHANNEL),
 253                                 chptr->chname);
 254                 return 0;
 255         }
 256
 257         RB_DLINK_FOREACH(ptr, chptr->members.head)
 258         {
 259                 msptr = ptr->data;
 260                 target_p = msptr->client_p;
 261
 262                 if(EmptyString(target_p->sockhost))
 263                         sockhost = empty_sockhost;
 264                 else if(!show_ip(source_p, target_p))
 265                         sockhost = spoofed_sockhost;
 266                 else
 267                         sockhost = target_p->sockhost;
 268
 269                 sendto_one(source_p, form_str(RPL_ETRACE),
 270                                 me.name, source_p->name,
 271                                 IsOper(target_p) ? "Oper" : "User",
 272                                 /* class field -- pretend its server.. */
 273                                 target_p->servptr->name,
 274                                 target_p->name, target_p->username, target_p->host,
 275                                 sockhost, target_p->info);
 276         }
 277
 278         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 279         return 0;
 280 }
 281
 282 static void
 283 match_masktrace(struct Client *source_p, rb_dlink_list *list,
 284         const char *username, const char *hostname, const char *name,
 285         const char *gecos)
 286 {
 287         struct Client *target_p;
 288         rb_dlink_node *ptr;
 289         const char *sockhost;
 290
 291         RB_DLINK_FOREACH(ptr, list->head)
 292         {
 293                 target_p = ptr->data;
 294                 if(!IsPerson(target_p))
 295                         continue;
 296
 297                 if(EmptyString(target_p->sockhost))
 298                         sockhost = empty_sockhost;
 299                 else if(!show_ip(source_p, target_p))
 300                         sockhost = spoofed_sockhost;
 301                 else
 302                         sockhost = target_p->sockhost;
 303
 304                 if(match(username, target_p->username) &&
 305                    (match(hostname, target_p->host) ||
 306                     match(hostname, target_p->orighost) ||
 307                     match(hostname, sockhost) || match_ips(hostname, sockhost)))
 308                 {
 309                         if(name != NULL && !match(name, target_p->name))
 310                                 continue;
 311
 312                         if(gecos != NULL && !match_esc(gecos, target_p->info))
 313                                 continue;
 314
 315                         sendto_one(source_p, form_str(RPL_ETRACE),
 316                                 me.name, source_p->name,
 317                                 IsOper(target_p) ? "Oper" : "User",
 318                                 /* class field -- pretend its server.. */
 319                                 target_p->servptr->name,
 320                                 target_p->name, target_p->username, target_p->host,
 321                                 sockhost, target_p->info);
 322                 }
 323         }
 324 }
 325
 326 static int
 327 mo_masktrace(struct Client *client_p, struct Client *source_p, int parc,
 328         const char *parv[])
 329 {
 330         char *name, *username, *hostname, *gecos;
 331         const char *mask;
 332         int operspy = 0;
 333
 334         mask = parv[1];
 335         name = LOCAL_COPY(parv[1]);
 336         collapse(name);
 337
 338         if(IsOperSpy(source_p) && parv[1][0] == '!')
 339         {
 340                 name++;
 341                 mask++;
 342                 operspy = 1;
 343         }
 344
 345         if(parc > 2 && !EmptyString(parv[2]))
 346         {
 347                 gecos = LOCAL_COPY(parv[2]);
 348                 collapse_esc(gecos);
 349         } else
 350                 gecos = NULL;
 351
 352
 353         if((hostname = strchr(name, '@')) == NULL)
 354         {
 355                 sendto_one_notice(source_p, ":Invalid parameters");
 356                 return 0;
 357         }
 358
 359         *hostname++ = '\0';
 360
 361         if((username = strchr(name, '!')) == NULL)
 362         {
 363                 username = name;
 364                 name = NULL;
 365         } else
 366                 *username++ = '\0';
 367
 368         if(EmptyString(username) || EmptyString(hostname))
 369         {
 370                 sendto_one_notice(source_p, ":Invalid parameters");
 371                 return 0;
 372         }
 373
 374         if(operspy) {
 375                 if (!ConfigFileEntry.operspy_dont_care_user_info)
 376                 {
 377                         char buf[512];
 378                         rb_strlcpy(buf, mask, sizeof(buf));
 379                         if(!EmptyString(gecos)) {
 380                                 rb_strlcat(buf, " ", sizeof(buf));
 381                                 rb_strlcat(buf, gecos, sizeof(buf));
 382                         }
 383
 384                         report_operspy(source_p, "MASKTRACE", buf);
 385                 }
 386                 match_masktrace(source_p, &global_client_list, username, hostname, name, gecos);
 387         } else
 388                 match_masktrace(source_p, &lclient_list, username, hostname, name, gecos);
 389
 390         sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name);
 391         return 0;
 392 }