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 "common.h"
  36 #include "config.h"
  37 #include "class.h"
  38 #include "ircd.h"
  39 #include "numeric.h"
  40 #include "logger.h"
  41 #include "s_serv.h"
  42 #include "whowas.h"
  43 #include "match.h"
  44 #include "hash.h"
  45 #include "msg.h"
  46 #include "parse.h"
  47 #include "modules.h"
  48 #include "s_conf.h"
  49 #include "s_newconf.h"
  50 #include "reject.h"
  51 #include "bandbi.h"
  52 #include "operhash.h"
  53
  54 static const char xline_desc[] =
  55         "Provides management of GECOS bans via (UN)XLINE command";
  56
  57 static void mo_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  58 static void ms_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  59 static void me_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  60 static void mo_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  61                       const char *parv[]);
  62 static void ms_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  63                       const char *parv[]);
  64 static void me_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  65                       const char *parv[]);
  66
  67 static bool valid_xline(struct Client *, const char *, const char *);
  68 static void apply_xline(struct Client *client_p, const char *name,
  69                         const char *reason, int temp_time, int propagated);
  70 static void propagate_xline(struct Client *source_p, const char *target,
  71                             int temp_time, const char *name, const char *type, const char *reason);
  72 static void cluster_xline(struct Client *source_p, int temp_time,
  73                           const char *name, const char *reason);
  74
  75 static void handle_remote_xline(struct Client *source_p, int temp_time,
  76                                 const char *name, const char *reason);
  77 static void handle_remote_unxline(struct Client *source_p, const char *name);
  78 static void remove_xline(struct Client *source_p, const char *name,
  79                          int propagated);
  80
  81 struct Message xline_msgtab = {
  82         "XLINE", 0, 0, 0, 0,
  83         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  84 };
  85
  86 struct Message unxline_msgtab = {
  87         "UNXLINE", 0, 0, 0, 0,
  88         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  89 };
  90
  91 mapi_clist_av1 xline_clist[] = { &xline_msgtab, &unxline_msgtab, NULL };
  92
  93 DECLARE_MODULE_AV2(xline, NULL, NULL, xline_clist, NULL, NULL, NULL, NULL, xline_desc);
  94
  95 /* m_xline()
  96  *
  97  * parv[1] - thing to xline
  98  * parv[2] - optional type/reason
  99  * parv[3] - reason
 100  */
 101 static void
 102 mo_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 103 {
 104         struct ConfItem *aconf;
 105         const char *name;
 106         const char *reason;
 107         const char *target_server = NULL;
 108         int temp_time;
 109         int loc = 1;
 110         int propagated = ConfigFileEntry.use_propagated_bans;
 111
 112         if(!IsOperXline(source_p))
 113         {
 114                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 115                 return;
 116         }
 117
 118         if((temp_time = valid_temp_time(parv[loc])) >= 0)
 119                 loc++;
 120         /* we just set temp_time to -1! */
 121         else
 122                 temp_time = 0;
 123
 124         name = parv[loc];
 125         loc++;
 126
 127         /* XLINE <gecos> ON <server> :<reason> */
 128         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 129         {
 130                 if(!IsOperRemoteBan(source_p))
 131                 {
 132                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 133                                    me.name, source_p->name, "remoteban");
 134                         return;
 135                 }
 136
 137                 target_server = parv[loc + 1];
 138                 loc += 2;
 139         }
 140
 141         if(parc <= loc || EmptyString(parv[loc]))
 142         {
 143                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 144                            me.name, source_p->name, "XLINE");
 145                 return;
 146         }
 147
 148         reason = parv[loc];
 149
 150         if(target_server != NULL)
 151         {
 152                 propagate_xline(source_p, target_server, temp_time, name, "2", reason);
 153
 154                 if(!match(target_server, me.name))
 155                         return;
 156
 157                 /* Set as local-only. */
 158                 propagated = 0;
 159         }
 160         else if(!propagated && rb_dlink_list_length(&cluster_conf_list) > 0)
 161                 cluster_xline(source_p, temp_time, name, reason);
 162
 163         if((aconf = find_xline_mask(name)) != NULL)
 164         {
 165                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 166                            me.name, source_p->name, name, aconf->host, aconf->passwd);
 167                 return;
 168         }
 169
 170         if(!valid_xline(source_p, name, reason))
 171                 return;
 172
 173         if(propagated && temp_time == 0)
 174         {
 175                 sendto_one_notice(source_p, ":Cannot set a permanent global ban");
 176                 return;
 177         }
 178
 179         apply_xline(source_p, name, reason, temp_time, propagated);
 180 }
 181
 182 /* ms_xline()
 183  *
 184  * handles a remote xline
 185  */
 186 static void
 187 ms_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 188 {
 189         /* parv[0]  parv[1]      parv[2]  parv[3]  parv[4]
 190          * oper     target serv  xline    type     reason
 191          */
 192         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 193
 194         if(!IsPerson(source_p))
 195                 return;
 196
 197         /* destined for me? */
 198         if(!match(parv[1], me.name))
 199                 return;
 200
 201         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 202 }
 203
 204 static void
 205 me_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 206 {
 207         /* time name type :reason */
 208         if(!IsPerson(source_p))
 209                 return;
 210
 211         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 212 }
 213
 214 static void
 215 handle_remote_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 216 {
 217         struct ConfItem *aconf;
 218
 219         if(!find_shared_conf(source_p->username, source_p->host,
 220                              source_p->servptr->name,
 221                              (temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
 222                 return;
 223
 224         if(!valid_xline(source_p, name, reason))
 225                 return;
 226
 227         /* already xlined */
 228         if((aconf = find_xline_mask(name)) != NULL)
 229         {
 230                 sendto_one_notice(source_p, ":[%s] already X-Lined by [%s] - %s", name, aconf->host,
 231                                   aconf->passwd);
 232                 return;
 233         }
 234
 235         apply_xline(source_p, name, reason, temp_time, 0);
 236 }
 237
 238 /* valid_xline()
 239  *
 240  * inputs       - client xlining, gecos, reason and whether to warn
 241  * outputs      -
 242  * side effects - checks the xline for validity, erroring if needed
 243  */
 244 static bool
 245 valid_xline(struct Client *source_p, const char *gecos, const char *reason)
 246 {
 247         if(EmptyString(reason))
 248         {
 249                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 250                            get_id(&me, source_p), get_id(source_p, source_p), "XLINE");
 251                 return false;
 252         }
 253
 254         if(!valid_wild_card_simple(gecos))
 255         {
 256                 sendto_one_notice(source_p,
 257                                   ":Please include at least %d non-wildcard "
 258                                   "characters with the xline",
 259                                   ConfigFileEntry.min_nonwildcard_simple);
 260                 return false;
 261         }
 262
 263         return true;
 264 }
 265
 266 void
 267 apply_xline(struct Client *source_p, const char *name, const char *reason, int temp_time, int propagated)
 268 {
 269         struct ConfItem *aconf;
 270
 271         aconf = make_conf();
 272         aconf->status = CONF_XLINE;
 273         aconf->created = rb_current_time();
 274         aconf->host = rb_strdup(name);
 275         aconf->passwd = rb_strdup(reason);
 276         collapse(aconf->host);
 277
 278         aconf->info.oper = operhash_add(get_oper_name(source_p));
 279
 280         if(propagated)
 281         {
 282                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 283                 aconf->hold = rb_current_time() + temp_time;
 284                 aconf->lifetime = aconf->hold;
 285
 286                 replace_old_ban(aconf);
 287                 rb_dlinkAddAlloc(aconf, &prop_bans);
 288
 289                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 290                                        "%s added global %d min. X-Line for [%s] [%s]",
 291                                        get_oper_name(source_p), temp_time / 60,
 292                                        aconf->host, reason);
 293                 ilog(L_KLINE, "X %s %d %s %s",
 294                      get_oper_name(source_p), temp_time / 60, name, reason);
 295                 sendto_one_notice(source_p, ":Added global %d min. X-Line [%s]",
 296                                   temp_time / 60, aconf->host);
 297                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 298                                 ":%s BAN X * %s %lu %d %d * :%s",
 299                                 source_p->id, aconf->host,
 300                                 (unsigned long)aconf->created,
 301                                 (int)(aconf->hold - aconf->created),
 302                                 (int)(aconf->lifetime - aconf->created),
 303                                 reason);
 304         }
 305         else if(temp_time > 0)
 306         {
 307                 aconf->hold = rb_current_time() + temp_time;
 308
 309                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 310                                        "%s added temporary %d min. X-Line for [%s] [%s]",
 311                                        get_oper_name(source_p), temp_time / 60,
 312                                        aconf->host, reason);
 313                 ilog(L_KLINE, "X %s %d %s %s",
 314                      get_oper_name(source_p), temp_time / 60, name, reason);
 315                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 316                                   temp_time / 60, aconf->host);
 317         }
 318         else
 319         {
 320                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 321                                        get_oper_name(source_p), aconf->host, aconf->passwd);
 322                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 323                                   aconf->host, aconf->passwd);
 324
 325                 bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, aconf->passwd, NULL, 0);
 326                 ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, aconf->passwd);
 327         }
 328
 329         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 330         check_xlines();
 331 }
 332
 333 static void
 334 propagate_xline(struct Client *source_p, const char *target,
 335                 int temp_time, const char *name, const char *type, const char *reason)
 336 {
 337         if(!temp_time)
 338         {
 339                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 340                                    "XLINE %s %s %s :%s", target, name, type, reason);
 341                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 342                                    "ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
 343         }
 344         else
 345                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 346                                    "ENCAP %s XLINE %d %s %s :%s",
 347                                    target, temp_time, name, type, reason);
 348 }
 349
 350 static void
 351 cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 352 {
 353         struct remote_conf *shared_p;
 354         rb_dlink_node *ptr;
 355
 356         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 357         {
 358                 shared_p = ptr->data;
 359
 360                 /* old protocol cant handle temps, and we dont really want
 361                  * to convert them to perm.. --fl
 362                  */
 363                 if(!temp_time)
 364                 {
 365                         if(!(shared_p->flags & SHARED_PXLINE))
 366                                 continue;
 367
 368                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 369                                            "XLINE %s %s 2 :%s", shared_p->server, name, reason);
 370                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 371                                            "ENCAP %s XLINE 0 %s 2 :%s",
 372                                            shared_p->server, name, reason);
 373                 }
 374                 else if(shared_p->flags & SHARED_TXLINE)
 375                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 376                                            "ENCAP %s XLINE %d %s 2 :%s",
 377                                            shared_p->server, temp_time, name, reason);
 378         }
 379 }
 380
 381 /* mo_unxline()
 382  *
 383  * parv[1] - thing to unxline
 384  */
 385 static void
 386 mo_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 387 {
 388         int propagated = 1;
 389
 390         if(!IsOperXline(source_p))
 391         {
 392                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 393                 return;
 394         }
 395
 396         if(parc == 4 && !(irccmp(parv[2], "ON")))
 397         {
 398                 if(!IsOperRemoteBan(source_p))
 399                 {
 400                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 401                                    me.name, source_p->name, "remoteban");
 402                         return;
 403                 }
 404
 405                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
 406
 407                 if(match(parv[3], me.name) == 0)
 408                         return;
 409
 410                 propagated = 0;
 411         }
 412         /* cluster{} moved to remove_xline */
 413
 414         remove_xline(source_p, parv[1], propagated);
 415 }
 416
 417 /* ms_unxline()
 418  *
 419  * handles a remote unxline
 420  */
 421 static void
 422 ms_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 423 {
 424         /* parv[0]  parv[1]        parv[2]
 425          * oper     target server  gecos
 426          */
 427         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
 428
 429         if(!match(parv[1], me.name))
 430                 return;
 431
 432         if(!IsPerson(source_p))
 433                 return;
 434
 435         handle_remote_unxline(source_p, parv[2]);
 436 }
 437
 438 static void
 439 me_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 440 {
 441         /* name */
 442         if(!IsPerson(source_p))
 443                 return;
 444
 445         handle_remote_unxline(source_p, parv[1]);
 446 }
 447
 448 static void
 449 handle_remote_unxline(struct Client *source_p, const char *name)
 450 {
 451         if(!find_shared_conf(source_p->username, source_p->host,
 452                              source_p->servptr->name, SHARED_UNXLINE))
 453                 return;
 454
 455         remove_xline(source_p, name, 0);
 456 }
 457
 458 static void
 459 remove_xline(struct Client *source_p, const char *name, int propagated)
 460 {
 461         struct ConfItem *aconf;
 462         rb_dlink_node *ptr;
 463         time_t now;
 464
 465         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 466         {
 467                 aconf = ptr->data;
 468
 469                 if(!irccmp(aconf->host, name))
 470                 {
 471                         if(aconf->lifetime)
 472                         {
 473                                 if(!propagated)
 474                                 {
 475                                         sendto_one_notice(source_p, ":Cannot remove global X-Line %s on specific servers", name);
 476                                         return;
 477                                 }
 478                                 ptr = rb_dlinkFind(aconf, &prop_bans);
 479                                 if(ptr == NULL)
 480                                         return;
 481                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 482                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 483                                                        "%s has removed the global X-Line for: [%s]",
 484                                                        get_oper_name(source_p), name);
 485                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 486                                 now = rb_current_time();
 487                                 if(aconf->created < now)
 488                                         aconf->created = now;
 489                                 else
 490                                         aconf->created++;
 491                                 aconf->hold = aconf->created;
 492                                 operhash_delete(aconf->info.oper);
 493                                 aconf->info.oper = operhash_add(get_oper_name(source_p));
 494                                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 495                                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 496                                                 ":%s BAN X * %s %lu %d %d * :*",
 497                                                 source_p->id, aconf->host,
 498                                                 (unsigned long)aconf->created,
 499                                                 0,
 500                                                 (int)(aconf->lifetime - aconf->created));
 501                                 remove_reject_mask(aconf->host, NULL);
 502                                 deactivate_conf(aconf, ptr, now);
 503                                 return;
 504                         }
 505                         else if(propagated && rb_dlink_list_length(&cluster_conf_list))
 506                                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 507                         if(!aconf->hold)
 508                         {
 509                                 bandb_del(BANDB_XLINE, aconf->host, NULL);
 510
 511                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", aconf->host);
 512                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 513                                                        "%s has removed the X-Line for: [%s]",
 514                                                        get_oper_name(source_p), aconf->host);
 515                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), aconf->host);
 516                         }
 517                         else
 518                         {
 519                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 520                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 521                                                        "%s has removed the temporary X-Line for: [%s]",
 522                                                        get_oper_name(source_p), name);
 523                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 524                         }
 525
 526                         remove_reject_mask(aconf->host, NULL);
 527                         free_conf(aconf);
 528                         rb_dlinkDestroy(ptr, &xline_conf_list);
 529                         return;
 530                 }
 531         }
 532
 533         if(propagated && rb_dlink_list_length(&cluster_conf_list))
 534                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
 535
 536         sendto_one_notice(source_p, ":No X-Line for %s", name);
 537 }