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  * $Id$
  31  */
  32
  33 #include "stdinc.h"
  34 #include "send.h"
  35 #include "channel.h"
  36 #include "client.h"
  37 #include "common.h"
  38 #include "config.h"
  39 #include "class.h"
  40 #include "ircd.h"
  41 #include "numeric.h"
  42 #include "logger.h"
  43 #include "s_serv.h"
  44 #include "whowas.h"
  45 #include "match.h"
  46 #include "hash.h"
  47 #include "msg.h"
  48 #include "parse.h"
  49 #include "modules.h"
  50 #include "s_conf.h"
  51 #include "s_newconf.h"
  52 #include "reject.h"
  53 #include "bandbi.h"
  54 #include "operhash.h"
  55
  56 static int mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  57 static int ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  58 static int me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  59 static int mo_unxline(struct Client *client_p, struct Client *source_p, int parc,
  60                       const char *parv[]);
  61 static int ms_unxline(struct Client *client_p, struct Client *source_p, int parc,
  62                       const char *parv[]);
  63 static int me_unxline(struct Client *client_p, struct Client *source_p, int parc,
  64                       const char *parv[]);
  65
  66 struct Message xline_msgtab = {
  67         "XLINE", 0, 0, 0, MFLG_SLOW,
  68         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  69 };
  70
  71 struct Message unxline_msgtab = {
  72         "UNXLINE", 0, 0, 0, MFLG_SLOW,
  73         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  74 };
  75
  76 mapi_clist_av1 xline_clist[] = { &xline_msgtab, &unxline_msgtab, NULL };
  77
  78 DECLARE_MODULE_AV1(xline, NULL, NULL, xline_clist, NULL, NULL, "$Revision$");
  79
  80 static int valid_xline(struct Client *, const char *, const char *);
  81 static void apply_xline(struct Client *client_p, const char *name,
  82                         const char *reason, int temp_time, int propagated);
  83 static void propagate_xline(struct Client *source_p, const char *target,
  84                             int temp_time, const char *name, const char *type, const char *reason);
  85 static void cluster_xline(struct Client *source_p, int temp_time,
  86                           const char *name, const char *reason);
  87
  88 static void handle_remote_xline(struct Client *source_p, int temp_time,
  89                                 const char *name, const char *reason);
  90 static void handle_remote_unxline(struct Client *source_p, const char *name);
  91
  92 static void remove_xline(struct Client *source_p, const char *name,
  93                          int propagated);
  94
  95
  96 /* m_xline()
  97  *
  98  * parv[1] - thing to xline
  99  * parv[2] - optional type/reason
 100  * parv[3] - reason
 101  */
 102 static int
 103 mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 104 {
 105         struct ConfItem *aconf;
 106         const char *name;
 107         const char *reason;
 108         const char *target_server = NULL;
 109         int temp_time;
 110         int loc = 1;
 111         int propagated = ConfigFileEntry.use_propagated_bans;
 112
 113         if(!IsOperXline(source_p))
 114         {
 115                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 116                 return 0;
 117         }
 118
 119         if((temp_time = valid_temp_time(parv[loc])) >= 0)
 120                 loc++;
 121         /* we just set temp_time to -1! */
 122         else
 123                 temp_time = 0;
 124
 125         name = parv[loc];
 126         loc++;
 127
 128         /* XLINE <gecos> ON <server> :<reason> */
 129         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 130         {
 131                 if(!IsOperRemoteBan(source_p))
 132                 {
 133                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 134                                    me.name, source_p->name, "remoteban");
 135                         return 0;
 136                 }
 137
 138                 target_server = parv[loc + 1];
 139                 loc += 2;
 140         }
 141
 142         if(parc <= loc || EmptyString(parv[loc]))
 143         {
 144                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 145                            me.name, source_p->name, "XLINE");
 146                 return 0;
 147         }
 148
 149         reason = parv[loc];
 150
 151         if(target_server != NULL)
 152         {
 153                 propagate_xline(source_p, target_server, temp_time, name, "2", reason);
 154
 155                 if(!match(target_server, me.name))
 156                         return 0;
 157
 158                 /* Set as local-only. */
 159                 propagated = 0;
 160         }
 161         else if(!propagated && rb_dlink_list_length(&cluster_conf_list) > 0)
 162                 cluster_xline(source_p, temp_time, name, reason);
 163
 164         if((aconf = find_xline_mask(name)) != NULL)
 165         {
 166                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 167                            me.name, source_p->name, name, aconf->host, aconf->passwd);
 168                 return 0;
 169         }
 170
 171         if(!valid_xline(source_p, name, reason))
 172                 return 0;
 173
 174         if(propagated && temp_time == 0)
 175         {
 176                 sendto_one_notice(source_p, ":Cannot set a permanent global ban");
 177                 return 0;
 178         }
 179
 180         apply_xline(source_p, name, reason, temp_time, propagated);
 181
 182         return 0;
 183 }
 184
 185 /* ms_xline()
 186  *
 187  * handles a remote xline
 188  */
 189 static int
 190 ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 191 {
 192         /* parv[0]  parv[1]      parv[2]  parv[3]  parv[4]
 193          * oper     target serv  xline    type     reason
 194          */
 195         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 196
 197         if(!IsPerson(source_p))
 198                 return 0;
 199
 200         /* destined for me? */
 201         if(!match(parv[1], me.name))
 202                 return 0;
 203
 204         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 205         return 0;
 206 }
 207
 208 static int
 209 me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 210 {
 211         /* time name type :reason */
 212         if(!IsPerson(source_p))
 213                 return 0;
 214
 215         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 216         return 0;
 217 }
 218
 219 static void
 220 handle_remote_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 221 {
 222         struct ConfItem *aconf;
 223
 224         if(!find_shared_conf(source_p->username, source_p->host,
 225                              source_p->servptr->name,
 226                              (temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
 227                 return;
 228
 229         if(!valid_xline(source_p, name, reason))
 230                 return;
 231
 232         /* already xlined */
 233         if((aconf = find_xline_mask(name)) != NULL)
 234         {
 235                 sendto_one_notice(source_p, ":[%s] already X-Lined by [%s] - %s", name, aconf->host,
 236                                   aconf->passwd);
 237                 return;
 238         }
 239
 240         apply_xline(source_p, name, reason, temp_time, 0);
 241 }
 242
 243 /* valid_xline()
 244  *
 245  * inputs       - client xlining, gecos, reason and whether to warn
 246  * outputs      -
 247  * side effects - checks the xline for validity, erroring if needed
 248  */
 249 static int
 250 valid_xline(struct Client *source_p, const char *gecos, const char *reason)
 251 {
 252         if(EmptyString(reason))
 253         {
 254                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 255                            get_id(&me, source_p), get_id(source_p, source_p), "XLINE");
 256                 return 0;
 257         }
 258
 259         if(strchr(reason, ':') != NULL)
 260         {
 261                 sendto_one_notice(source_p, ":Invalid character ':' in comment");
 262                 return 0;
 263         }
 264
 265         if(strchr(reason, '"'))
 266         {
 267                 sendto_one_notice(source_p, ":Invalid character '\"' in comment");
 268                 return 0;
 269         }
 270
 271         if(!valid_wild_card_simple(gecos))
 272         {
 273                 sendto_one_notice(source_p,
 274                                   ":Please include at least %d non-wildcard "
 275                                   "characters with the xline",
 276                                   ConfigFileEntry.min_nonwildcard_simple);
 277                 return 0;
 278         }
 279
 280         return 1;
 281 }
 282
 283 void
 284 apply_xline(struct Client *source_p, const char *name, const char *reason, int temp_time, int propagated)
 285 {
 286         struct ConfItem *aconf;
 287
 288         aconf = make_conf();
 289         aconf->status = CONF_XLINE;
 290         aconf->created = rb_current_time();
 291         aconf->host = rb_strdup(name);
 292         aconf->passwd = rb_strdup(reason);
 293         collapse(aconf->host);
 294
 295         aconf->info.oper = operhash_add(get_oper_name(source_p));
 296
 297         if(propagated)
 298         {
 299                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 300                 aconf->hold = rb_current_time() + temp_time;
 301                 aconf->lifetime = aconf->hold;
 302
 303                 replace_old_ban(aconf);
 304                 rb_dlinkAddAlloc(aconf, &prop_bans);
 305
 306                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 307                                        "%s added global %d min. X-Line for [%s] [%s]",
 308                                        get_oper_name(source_p), temp_time / 60,
 309                                        aconf->host, reason);
 310                 ilog(L_KLINE, "X %s %d %s %s",
 311                      get_oper_name(source_p), temp_time / 60, name, reason);
 312                 sendto_one_notice(source_p, ":Added global %d min. X-Line [%s]",
 313                                   temp_time / 60, aconf->host);
 314                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 315                                 ":%s BAN X * %s %lu %d %d * :%s",
 316                                 source_p->id, aconf->host,
 317                                 (unsigned long)aconf->created,
 318                                 (int)(aconf->hold - aconf->created),
 319                                 (int)(aconf->lifetime - aconf->created),
 320                                 reason);
 321         }
 322         else if(temp_time > 0)
 323         {
 324                 aconf->hold = rb_current_time() + temp_time;
 325
 326                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 327                                        "%s added temporary %d min. X-Line for [%s] [%s]",
 328                                        get_oper_name(source_p), temp_time / 60,
 329                                        aconf->host, reason);
 330                 ilog(L_KLINE, "X %s %d %s %s",
 331                      get_oper_name(source_p), temp_time / 60, name, reason);
 332                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 333                                   temp_time / 60, aconf->host);
 334         }
 335         else
 336         {
 337                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 338                                        get_oper_name(source_p), aconf->host, aconf->passwd);
 339                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 340                                   aconf->host, aconf->passwd);
 341
 342                 bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, aconf->passwd, NULL, 0);
 343                 ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, aconf->passwd);
 344         }
 345
 346         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 347         check_xlines();
 348 }
 349
 350 static void
 351 propagate_xline(struct Client *source_p, const char *target,
 352                 int temp_time, const char *name, const char *type, const char *reason)
 353 {
 354         if(!temp_time)
 355         {
 356                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 357                                    "XLINE %s %s %s :%s", target, name, type, reason);
 358                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 359                                    "ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
 360         }
 361         else
 362                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 363                                    "ENCAP %s XLINE %d %s %s :%s",
 364                                    target, temp_time, name, type, reason);
 365 }
 366
 367 static void
 368 cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 369 {
 370         struct remote_conf *shared_p;
 371         rb_dlink_node *ptr;
 372
 373         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 374         {
 375                 shared_p = ptr->data;
 376
 377                 /* old protocol cant handle temps, and we dont really want
 378                  * to convert them to perm.. --fl
 379                  */
 380                 if(!temp_time)
 381                 {
 382                         if(!(shared_p->flags & SHARED_PXLINE))
 383                                 continue;
 384
 385                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 386                                            "XLINE %s %s 2 :%s", shared_p->server, name, reason);
 387                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 388                                            "ENCAP %s XLINE 0 %s 2 :%s",
 389                                            shared_p->server, name, reason);
 390                 }
 391                 else if(shared_p->flags & SHARED_TXLINE)
 392                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 393                                            "ENCAP %s XLINE %d %s 2 :%s",
 394                                            shared_p->server, temp_time, name, reason);
 395         }
 396 }
 397
 398 /* mo_unxline()
 399  *
 400  * parv[1] - thing to unxline
 401  */
 402 static int
 403 mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 404 {
 405         int propagated = 1;
 406
 407         if(!IsOperXline(source_p))
 408         {
 409                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 410                 return 0;
 411         }
 412
 413         if(parc == 4 && !(irccmp(parv[2], "ON")))
 414         {
 415                 if(!IsOperRemoteBan(source_p))
 416                 {
 417                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 418                                    me.name, source_p->name, "remoteban");
 419                         return 0;
 420                 }
 421
 422                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
 423
 424                 if(match(parv[3], me.name) == 0)
 425                         return 0;
 426
 427                 propagated = 0;
 428         }
 429         /* cluster{} moved to remove_xline */
 430
 431         remove_xline(source_p, parv[1], propagated);
 432
 433         return 0;
 434 }
 435
 436 /* ms_unxline()
 437  *
 438  * handles a remote unxline
 439  */
 440 static int
 441 ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 442 {
 443         /* parv[0]  parv[1]        parv[2]
 444          * oper     target server  gecos
 445          */
 446         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
 447
 448         if(!match(parv[1], me.name))
 449                 return 0;
 450
 451         if(!IsPerson(source_p))
 452                 return 0;
 453
 454         handle_remote_unxline(source_p, parv[2]);
 455         return 0;
 456 }
 457
 458 static int
 459 me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 460 {
 461         /* name */
 462         if(!IsPerson(source_p))
 463                 return 0;
 464
 465         handle_remote_unxline(source_p, parv[1]);
 466         return 0;
 467 }
 468
 469 static void
 470 handle_remote_unxline(struct Client *source_p, const char *name)
 471 {
 472         if(!find_shared_conf(source_p->username, source_p->host,
 473                              source_p->servptr->name, SHARED_UNXLINE))
 474                 return;
 475
 476         remove_xline(source_p, name, 0);
 477
 478         return;
 479 }
 480
 481 static void
 482 remove_xline(struct Client *source_p, const char *name, int propagated)
 483 {
 484         struct ConfItem *aconf;
 485         rb_dlink_node *ptr;
 486
 487         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 488         {
 489                 aconf = ptr->data;
 490
 491                 if(!irccmp(aconf->host, name))
 492                 {
 493                         if(aconf->lifetime)
 494                         {
 495                                 if(!propagated)
 496                                 {
 497                                         sendto_one_notice(source_p, ":Cannot remove global X-Line %s on specific servers", name);
 498                                         return;
 499                                 }
 500                                 ptr = rb_dlinkFind(aconf, &prop_bans);
 501                                 if(ptr == NULL)
 502                                         return;
 503                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 504                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 505                                                        "%s has removed the global X-Line for: [%s]",
 506                                                        get_oper_name(source_p), name);
 507                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 508                                 if(aconf->created < rb_current_time())
 509                                         aconf->created = rb_current_time();
 510                                 else
 511                                         aconf->created++;
 512                                 aconf->hold = aconf->created;
 513                                 operhash_delete(aconf->info.oper);
 514                                 aconf->info.oper = operhash_add(get_oper_name(source_p));
 515                                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 516                                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 517                                                 ":%s BAN X * %s %lu %d %d * :*",
 518                                                 source_p->id, aconf->host,
 519                                                 (unsigned long)aconf->created,
 520                                                 0,
 521                                                 (int)(aconf->lifetime - aconf->created));
 522                                 remove_reject_mask(aconf->host, NULL);
 523                                 deactivate_conf(aconf, ptr);
 524                                 return;
 525                         }
 526                         else if(propagated && rb_dlink_list_length(&cluster_conf_list))
 527                                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 528                         if(!aconf->hold)
 529                         {
 530                                 bandb_del(BANDB_XLINE, aconf->host, NULL);
 531
 532                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", aconf->host);
 533                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 534                                                        "%s has removed the X-Line for: [%s]",
 535                                                        get_oper_name(source_p), aconf->host);
 536                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), aconf->host);
 537                         }
 538                         else
 539                         {
 540                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 541                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 542                                                        "%s has removed the temporary X-Line for: [%s]",
 543                                                        get_oper_name(source_p), name);
 544                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 545                         }
 546
 547                         remove_reject_mask(aconf->host, NULL);
 548                         free_conf(aconf);
 549                         rb_dlinkDestroy(ptr, &xline_conf_list);
 550                         return;
 551                 }
 552         }
 553
 554         if(propagated && rb_dlink_list_length(&cluster_conf_list))
 555                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 556
 557         sendto_one_notice(source_p, ":No X-Line for %s", name);
 558
 559         return;
 560 }