modules/m_xline.c

   1 /* modules/m_xline.c
   2  *
   3  *  Copyright (C) 2002-2003 Lee Hardy <lee@leeh.co.uk>
   4  *  Copyright (C) 2002-2005 ircd-ratbox development team
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  * 1.Redistributions of source code must retain the above copyright notice,
  11  *   this list of conditions and the following disclaimer.
  12  * 2.Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in the
  14  *   documentation and/or other materials provided with the distribution.
  15  * 3.The name of the author may not be used to endorse or promote products
  16  *   derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "stdinc.h"
  32 #include "send.h"
  33 #include "channel.h"
  34 #include "client.h"
  35 #include "defaults.h"
  36 #include "class.h"
  37 #include "ircd.h"
  38 #include "numeric.h"
  39 #include "logger.h"
  40 #include "s_serv.h"
  41 #include "whowas.h"
  42 #include "match.h"
  43 #include "hash.h"
  44 #include "msg.h"
  45 #include "parse.h"
  46 #include "modules.h"
  47 #include "s_conf.h"
  48 #include "s_newconf.h"
  49 #include "reject.h"
  50 #include "bandbi.h"
  51 #include "operhash.h"
  52
  53 static const char xline_desc[] =
  54         "Provides management of GECOS bans via (UN)XLINE command";
  55
  56 static void mo_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  57 static void ms_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  58 static void me_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  59 static void mo_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  60                       const char *parv[]);
  61 static void ms_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  62                       const char *parv[]);
  63 static void me_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  64                       const char *parv[]);
  65
  66 static bool valid_xline(struct Client *, const char *, const char *);
  67 static void apply_xline(struct Client *client_p, const char *name,
  68                         const char *reason, int temp_time, bool propagated);
  69 static void propagate_xline(struct Client *source_p, const char *target,
  70                             int temp_time, const char *name, const char *type, const char *reason);
  71 static void cluster_xline(struct Client *source_p, int temp_time,
  72                           const char *name, const char *reason);
  73
  74 static void handle_remote_xline(struct Client *source_p, int temp_time,
  75                                 const char *name, const char *reason);
  76 static void handle_remote_unxline(struct Client *source_p, const char *name);
  77 static void remove_xline(struct Client *source_p, const char *name,
  78                          bool propagated);
  79
  80 struct Message xline_msgtab = {
  81         "XLINE", 0, 0, 0, 0,
  82         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  83 };
  84
  85 struct Message unxline_msgtab = {
  86         "UNXLINE", 0, 0, 0, 0,
  87         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  88 };
  89
  90 mapi_clist_av1 xline_clist[] = { &xline_msgtab, &unxline_msgtab, NULL };
  91
  92 DECLARE_MODULE_AV2(xline, NULL, NULL, xline_clist, NULL, NULL, NULL, NULL, xline_desc);
  93
  94 /* m_xline()
  95  *
  96  * parv[1] - thing to xline
  97  * parv[2] - optional type/reason
  98  * parv[3] - reason
  99  */
 100 static void
 101 mo_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 102 {
 103         struct ConfItem *aconf;
 104         const char *name;
 105         const char *reason;
 106         const char *target_server = NULL;
 107         int temp_time;
 108         int loc = 1;
 109         bool propagated = ConfigFileEntry.use_propagated_bans;
 110
 111         if(!IsOperXline(source_p))
 112         {
 113                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 114                 return;
 115         }
 116
 117         if((temp_time = valid_temp_time(parv[loc])) >= 0)
 118                 loc++;
 119         /* we just set temp_time to -1! */
 120         else
 121                 temp_time = 0;
 122
 123         name = parv[loc];
 124         loc++;
 125
 126         /* XLINE <gecos> ON <server> :<reason> */
 127         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 128         {
 129                 if(!IsOperRemoteBan(source_p))
 130                 {
 131                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 132                                    me.name, source_p->name, "remoteban");
 133                         return;
 134                 }
 135
 136                 target_server = parv[loc + 1];
 137                 loc += 2;
 138         }
 139
 140         if(parc <= loc || EmptyString(parv[loc]))
 141         {
 142                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 143                            me.name, source_p->name, "XLINE");
 144                 return;
 145         }
 146
 147         reason = parv[loc];
 148
 149         if(target_server != NULL)
 150         {
 151                 propagate_xline(source_p, target_server, temp_time, name, "2", reason);
 152
 153                 if(!match(target_server, me.name))
 154                         return;
 155
 156                 /* Set as local-only. */
 157                 propagated = false;
 158         }
 159         else if(!propagated && rb_dlink_list_length(&cluster_conf_list) > 0)
 160                 cluster_xline(source_p, temp_time, name, reason);
 161
 162         if((aconf = find_xline_mask(name)) != NULL)
 163         {
 164                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 165                            me.name, source_p->name, name, aconf->host, aconf->passwd);
 166                 return;
 167         }
 168
 169         if(!valid_xline(source_p, name, reason))
 170                 return;
 171
 172         if(propagated && temp_time == 0)
 173         {
 174                 sendto_one_notice(source_p, ":Cannot set a permanent global ban");
 175                 return;
 176         }
 177
 178         apply_xline(source_p, name, reason, temp_time, propagated);
 179 }
 180
 181 /* ms_xline()
 182  *
 183  * handles a remote xline
 184  */
 185 static void
 186 ms_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 187 {
 188         /* parv[0]  parv[1]      parv[2]  parv[3]  parv[4]
 189          * oper     target serv  xline    type     reason
 190          */
 191         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 192
 193         if(!IsPerson(source_p))
 194                 return;
 195
 196         /* destined for me? */
 197         if(!match(parv[1], me.name))
 198                 return;
 199
 200         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 201 }
 202
 203 static void
 204 me_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 205 {
 206         /* time name type :reason */
 207         if(!IsPerson(source_p))
 208                 return;
 209
 210         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 211 }
 212
 213 static void
 214 handle_remote_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 215 {
 216         struct ConfItem *aconf;
 217
 218         if(!find_shared_conf(source_p->username, source_p->host,
 219                              source_p->servptr->name,
 220                              (temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
 221                 return;
 222
 223         if(!valid_xline(source_p, name, reason))
 224                 return;
 225
 226         /* already xlined */
 227         if((aconf = find_xline_mask(name)) != NULL)
 228         {
 229                 sendto_one_notice(source_p, ":[%s] already X-Lined by [%s] - %s", name, aconf->host,
 230                                   aconf->passwd);
 231                 return;
 232         }
 233
 234         apply_xline(source_p, name, reason, temp_time, false);
 235 }
 236
 237 /* valid_xline()
 238  *
 239  * inputs       - client xlining, gecos, reason and whether to warn
 240  * outputs      -
 241  * side effects - checks the xline for validity, erroring if needed
 242  */
 243 static bool
 244 valid_xline(struct Client *source_p, const char *gecos, const char *reason)
 245 {
 246         if(EmptyString(reason))
 247         {
 248                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 249                            get_id(&me, source_p), get_id(source_p, source_p), "XLINE");
 250                 return false;
 251         }
 252
 253         if(!valid_wild_card_simple(gecos))
 254         {
 255                 sendto_one_notice(source_p,
 256                                   ":Please include at least %d non-wildcard "
 257                                   "characters with the xline",
 258                                   ConfigFileEntry.min_nonwildcard_simple);
 259                 return false;
 260         }
 261
 262         return true;
 263 }
 264
 265 void
 266 apply_xline(struct Client *source_p, const char *name, const char *reason, int temp_time, bool propagated)
 267 {
 268         struct ConfItem *aconf;
 269
 270         aconf = make_conf();
 271         aconf->status = CONF_XLINE;
 272         aconf->created = rb_current_time();
 273         aconf->host = rb_strdup(name);
 274         aconf->passwd = rb_strdup(reason);
 275         collapse(aconf->host);
 276
 277         aconf->info.oper = operhash_add(get_oper_name(source_p));
 278
 279         if(propagated)
 280         {
 281                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 282                 aconf->hold = rb_current_time() + temp_time;
 283                 aconf->lifetime = aconf->hold;
 284
 285                 replace_old_ban(aconf);
 286                 rb_dlinkAddAlloc(aconf, &prop_bans);
 287
 288                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 289                                        "%s added global %d min. X-Line for [%s] [%s]",
 290                                        get_oper_name(source_p), temp_time / 60,
 291                                        aconf->host, reason);
 292                 ilog(L_KLINE, "X %s %d %s %s",
 293                      get_oper_name(source_p), temp_time / 60, name, reason);
 294                 sendto_one_notice(source_p, ":Added global %d min. X-Line [%s]",
 295                                   temp_time / 60, aconf->host);
 296                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 297                                 ":%s BAN X * %s %lu %d %d * :%s",
 298                                 source_p->id, aconf->host,
 299                                 (unsigned long)aconf->created,
 300                                 (int)(aconf->hold - aconf->created),
 301                                 (int)(aconf->lifetime - aconf->created),
 302                                 reason);
 303         }
 304         else if(temp_time > 0)
 305         {
 306                 aconf->hold = rb_current_time() + temp_time;
 307
 308                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 309                                        "%s added temporary %d min. X-Line for [%s] [%s]",
 310                                        get_oper_name(source_p), temp_time / 60,
 311                                        aconf->host, reason);
 312                 ilog(L_KLINE, "X %s %d %s %s",
 313                      get_oper_name(source_p), temp_time / 60, name, reason);
 314                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 315                                   temp_time / 60, aconf->host);
 316         }
 317         else
 318         {
 319                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 320                                        get_oper_name(source_p), aconf->host, aconf->passwd);
 321                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 322                                   aconf->host, aconf->passwd);
 323
 324                 bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, aconf->passwd, NULL, 0);
 325                 ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, aconf->passwd);
 326         }
 327
 328         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 329         check_xlines();
 330 }
 331
 332 static void
 333 propagate_xline(struct Client *source_p, const char *target,
 334                 int temp_time, const char *name, const char *type, const char *reason)
 335 {
 336         if(!temp_time)
 337         {
 338                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 339                                    "XLINE %s %s %s :%s", target, name, type, reason);
 340                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 341                                    "ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
 342         }
 343         else
 344                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 345                                    "ENCAP %s XLINE %d %s %s :%s",
 346                                    target, temp_time, name, type, reason);
 347 }
 348
 349 static void
 350 cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 351 {
 352         struct remote_conf *shared_p;
 353         rb_dlink_node *ptr;
 354
 355         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 356         {
 357                 shared_p = ptr->data;
 358
 359                 /* old protocol cant handle temps, and we dont really want
 360                  * to convert them to perm.. --fl
 361                  */
 362                 if(!temp_time)
 363                 {
 364                         if(!(shared_p->flags & SHARED_PXLINE))
 365                                 continue;
 366
 367                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 368                                            "XLINE %s %s 2 :%s", shared_p->server, name, reason);
 369                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 370                                            "ENCAP %s XLINE 0 %s 2 :%s",
 371                                            shared_p->server, name, reason);
 372                 }
 373                 else if(shared_p->flags & SHARED_TXLINE)
 374                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 375                                            "ENCAP %s XLINE %d %s 2 :%s",
 376                                            shared_p->server, temp_time, name, reason);
 377         }
 378 }
 379
 380 /* mo_unxline()
 381  *
 382  * parv[1] - thing to unxline
 383  */
 384 static void
 385 mo_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 386 {
 387         bool propagated = true;
 388
 389         if(!IsOperXline(source_p))
 390         {
 391                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 392                 return;
 393         }
 394
 395         if(parc == 4 && !(irccmp(parv[2], "ON")))
 396         {
 397                 if(!IsOperRemoteBan(source_p))
 398                 {
 399                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 400                                    me.name, source_p->name, "remoteban");
 401                         return;
 402                 }
 403
 404                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
 405
 406                 if(match(parv[3], me.name) == 0)
 407                         return;
 408
 409                 propagated = false;
 410         }
 411         /* cluster{} moved to remove_xline */
 412
 413         remove_xline(source_p, parv[1], propagated);
 414 }
 415
 416 /* ms_unxline()
 417  *
 418  * handles a remote unxline
 419  */
 420 static void
 421 ms_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 422 {
 423         /* parv[0]  parv[1]        parv[2]
 424          * oper     target server  gecos
 425          */
 426         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
 427
 428         if(!match(parv[1], me.name))
 429                 return;
 430
 431         if(!IsPerson(source_p))
 432                 return;
 433
 434         handle_remote_unxline(source_p, parv[2]);
 435 }
 436
 437 static void
 438 me_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 439 {
 440         /* name */
 441         if(!IsPerson(source_p))
 442                 return;
 443
 444         handle_remote_unxline(source_p, parv[1]);
 445 }
 446
 447 static void
 448 handle_remote_unxline(struct Client *source_p, const char *name)
 449 {
 450         if(!find_shared_conf(source_p->username, source_p->host,
 451                              source_p->servptr->name, SHARED_UNXLINE))
 452                 return;
 453
 454         remove_xline(source_p, name, false);
 455 }
 456
 457 static void
 458 remove_xline(struct Client *source_p, const char *name, bool propagated)
 459 {
 460         struct ConfItem *aconf;
 461         rb_dlink_node *ptr;
 462         time_t now;
 463
 464         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 465         {
 466                 aconf = ptr->data;
 467
 468                 if(!irccmp(aconf->host, name))
 469                 {
 470                         if(aconf->lifetime)
 471                         {
 472                                 if(!propagated)
 473                                 {
 474                                         sendto_one_notice(source_p, ":Cannot remove global X-Line %s on specific servers", name);
 475                                         return;
 476                                 }
 477                                 ptr = rb_dlinkFind(aconf, &prop_bans);
 478                                 if(ptr == NULL)
 479                                         return;
 480                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 481                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 482                                                        "%s has removed the global X-Line for: [%s]",
 483                                                        get_oper_name(source_p), name);
 484                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 485                                 now = rb_current_time();
 486                                 if(aconf->created < now)
 487                                         aconf->created = now;
 488                                 else
 489                                         aconf->created++;
 490                                 aconf->hold = aconf->created;
 491                                 operhash_delete(aconf->info.oper);
 492                                 aconf->info.oper = operhash_add(get_oper_name(source_p));
 493                                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 494                                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 495                                                 ":%s BAN X * %s %lu %d %d * :*",
 496                                                 source_p->id, aconf->host,
 497                                                 (unsigned long)aconf->created,
 498                                                 0,
 499                                                 (int)(aconf->lifetime - aconf->created));
 500                                 remove_reject_mask(aconf->host, NULL);
 501                                 deactivate_conf(aconf, ptr, now);
 502                                 return;
 503                         }
 504                         else if(propagated && rb_dlink_list_length(&cluster_conf_list))
 505                                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 506                         if(!aconf->hold)
 507                         {
 508                                 bandb_del(BANDB_XLINE, aconf->host, NULL);
 509
 510                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", aconf->host);
 511                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 512                                                        "%s has removed the X-Line for: [%s]",
 513                                                        get_oper_name(source_p), aconf->host);
 514                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), aconf->host);
 515                         }
 516                         else
 517                         {
 518                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 519                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 520                                                        "%s has removed the temporary X-Line for: [%s]",
 521                                                        get_oper_name(source_p), name);
 522                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 523                         }
 524
 525                         remove_reject_mask(aconf->host, NULL);
 526                         free_conf(aconf);
 527                         rb_dlinkDestroy(ptr, &xline_conf_list);
 528                         return;
 529                 }
 530         }
 531
 532         if(propagated && rb_dlink_list_length(&cluster_conf_list))
 533                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 534
 535         sendto_one_notice(source_p, ":No X-Line for %s", name);
 536 }