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(!valid_wild_card_simple(gecos))
 260         {
 261                 sendto_one_notice(source_p,
 262                                   ":Please include at least %d non-wildcard "
 263                                   "characters with the xline",
 264                                   ConfigFileEntry.min_nonwildcard_simple);
 265                 return 0;
 266         }
 267
 268         return 1;
 269 }
 270
 271 void
 272 apply_xline(struct Client *source_p, const char *name, const char *reason, int temp_time, int propagated)
 273 {
 274         struct ConfItem *aconf;
 275
 276         aconf = make_conf();
 277         aconf->status = CONF_XLINE;
 278         aconf->created = rb_current_time();
 279         aconf->host = rb_strdup(name);
 280         aconf->passwd = rb_strdup(reason);
 281         collapse(aconf->host);
 282
 283         aconf->info.oper = operhash_add(get_oper_name(source_p));
 284
 285         if(propagated)
 286         {
 287                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 288                 aconf->hold = rb_current_time() + temp_time;
 289                 aconf->lifetime = aconf->hold;
 290
 291                 replace_old_ban(aconf);
 292                 rb_dlinkAddAlloc(aconf, &prop_bans);
 293
 294                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 295                                        "%s added global %d min. X-Line for [%s] [%s]",
 296                                        get_oper_name(source_p), temp_time / 60,
 297                                        aconf->host, reason);
 298                 ilog(L_KLINE, "X %s %d %s %s",
 299                      get_oper_name(source_p), temp_time / 60, name, reason);
 300                 sendto_one_notice(source_p, ":Added global %d min. X-Line [%s]",
 301                                   temp_time / 60, aconf->host);
 302                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 303                                 ":%s BAN X * %s %lu %d %d * :%s",
 304                                 source_p->id, aconf->host,
 305                                 (unsigned long)aconf->created,
 306                                 (int)(aconf->hold - aconf->created),
 307                                 (int)(aconf->lifetime - aconf->created),
 308                                 reason);
 309         }
 310         else if(temp_time > 0)
 311         {
 312                 aconf->hold = rb_current_time() + temp_time;
 313
 314                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 315                                        "%s added temporary %d min. X-Line for [%s] [%s]",
 316                                        get_oper_name(source_p), temp_time / 60,
 317                                        aconf->host, reason);
 318                 ilog(L_KLINE, "X %s %d %s %s",
 319                      get_oper_name(source_p), temp_time / 60, name, reason);
 320                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 321                                   temp_time / 60, aconf->host);
 322         }
 323         else
 324         {
 325                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 326                                        get_oper_name(source_p), aconf->host, aconf->passwd);
 327                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 328                                   aconf->host, aconf->passwd);
 329
 330                 bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, aconf->passwd, NULL, 0);
 331                 ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, aconf->passwd);
 332         }
 333
 334         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 335         check_xlines();
 336 }
 337
 338 static void
 339 propagate_xline(struct Client *source_p, const char *target,
 340                 int temp_time, const char *name, const char *type, const char *reason)
 341 {
 342         if(!temp_time)
 343         {
 344                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 345                                    "XLINE %s %s %s :%s", target, name, type, reason);
 346                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 347                                    "ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
 348         }
 349         else
 350                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 351                                    "ENCAP %s XLINE %d %s %s :%s",
 352                                    target, temp_time, name, type, reason);
 353 }
 354
 355 static void
 356 cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 357 {
 358         struct remote_conf *shared_p;
 359         rb_dlink_node *ptr;
 360
 361         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 362         {
 363                 shared_p = ptr->data;
 364
 365                 /* old protocol cant handle temps, and we dont really want
 366                  * to convert them to perm.. --fl
 367                  */
 368                 if(!temp_time)
 369                 {
 370                         if(!(shared_p->flags & SHARED_PXLINE))
 371                                 continue;
 372
 373                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 374                                            "XLINE %s %s 2 :%s", shared_p->server, name, reason);
 375                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 376                                            "ENCAP %s XLINE 0 %s 2 :%s",
 377                                            shared_p->server, name, reason);
 378                 }
 379                 else if(shared_p->flags & SHARED_TXLINE)
 380                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 381                                            "ENCAP %s XLINE %d %s 2 :%s",
 382                                            shared_p->server, temp_time, name, reason);
 383         }
 384 }
 385
 386 /* mo_unxline()
 387  *
 388  * parv[1] - thing to unxline
 389  */
 390 static int
 391 mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 392 {
 393         int propagated = 1;
 394
 395         if(!IsOperXline(source_p))
 396         {
 397                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 398                 return 0;
 399         }
 400
 401         if(parc == 4 && !(irccmp(parv[2], "ON")))
 402         {
 403                 if(!IsOperRemoteBan(source_p))
 404                 {
 405                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 406                                    me.name, source_p->name, "remoteban");
 407                         return 0;
 408                 }
 409
 410                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
 411
 412                 if(match(parv[3], me.name) == 0)
 413                         return 0;
 414
 415                 propagated = 0;
 416         }
 417         /* cluster{} moved to remove_xline */
 418
 419         remove_xline(source_p, parv[1], propagated);
 420
 421         return 0;
 422 }
 423
 424 /* ms_unxline()
 425  *
 426  * handles a remote unxline
 427  */
 428 static int
 429 ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 430 {
 431         /* parv[0]  parv[1]        parv[2]
 432          * oper     target server  gecos
 433          */
 434         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
 435
 436         if(!match(parv[1], me.name))
 437                 return 0;
 438
 439         if(!IsPerson(source_p))
 440                 return 0;
 441
 442         handle_remote_unxline(source_p, parv[2]);
 443         return 0;
 444 }
 445
 446 static int
 447 me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 448 {
 449         /* name */
 450         if(!IsPerson(source_p))
 451                 return 0;
 452
 453         handle_remote_unxline(source_p, parv[1]);
 454         return 0;
 455 }
 456
 457 static void
 458 handle_remote_unxline(struct Client *source_p, const char *name)
 459 {
 460         if(!find_shared_conf(source_p->username, source_p->host,
 461                              source_p->servptr->name, SHARED_UNXLINE))
 462                 return;
 463
 464         remove_xline(source_p, name, 0);
 465
 466         return;
 467 }
 468
 469 static void
 470 remove_xline(struct Client *source_p, const char *name, int propagated)
 471 {
 472         struct ConfItem *aconf;
 473         rb_dlink_node *ptr;
 474
 475         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 476         {
 477                 aconf = ptr->data;
 478
 479                 if(!irccmp(aconf->host, name))
 480                 {
 481                         if(aconf->lifetime)
 482                         {
 483                                 if(!propagated)
 484                                 {
 485                                         sendto_one_notice(source_p, ":Cannot remove global X-Line %s on specific servers", name);
 486                                         return;
 487                                 }
 488                                 ptr = rb_dlinkFind(aconf, &prop_bans);
 489                                 if(ptr == NULL)
 490                                         return;
 491                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 492                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 493                                                        "%s has removed the global X-Line for: [%s]",
 494                                                        get_oper_name(source_p), name);
 495                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 496                                 if(aconf->created < rb_current_time())
 497                                         aconf->created = rb_current_time();
 498                                 else
 499                                         aconf->created++;
 500                                 aconf->hold = aconf->created;
 501                                 operhash_delete(aconf->info.oper);
 502                                 aconf->info.oper = operhash_add(get_oper_name(source_p));
 503                                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 504                                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 505                                                 ":%s BAN X * %s %lu %d %d * :*",
 506                                                 source_p->id, aconf->host,
 507                                                 (unsigned long)aconf->created,
 508                                                 0,
 509                                                 (int)(aconf->lifetime - aconf->created));
 510                                 remove_reject_mask(aconf->host, NULL);
 511                                 deactivate_conf(aconf, ptr);
 512                                 return;
 513                         }
 514                         else if(propagated && rb_dlink_list_length(&cluster_conf_list))
 515                                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 516                         if(!aconf->hold)
 517                         {
 518                                 bandb_del(BANDB_XLINE, aconf->host, NULL);
 519
 520                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", aconf->host);
 521                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 522                                                        "%s has removed the X-Line for: [%s]",
 523                                                        get_oper_name(source_p), aconf->host);
 524                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), aconf->host);
 525                         }
 526                         else
 527                         {
 528                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 529                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 530                                                        "%s has removed the temporary X-Line for: [%s]",
 531                                                        get_oper_name(source_p), name);
 532                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 533                         }
 534
 535                         remove_reject_mask(aconf->host, NULL);
 536                         free_conf(aconf);
 537                         rb_dlinkDestroy(ptr, &xline_conf_list);
 538                         return;
 539                 }
 540         }
 541
 542         if(propagated && rb_dlink_list_length(&cluster_conf_list))
 543                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 544
 545         sendto_one_notice(source_p, ":No X-Line for %s", name);
 546
 547         return;
 548 }