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 int mo_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  55 static int ms_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  56 static int me_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  57 static int mo_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  58                       const char *parv[]);
  59 static int ms_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  60                       const char *parv[]);
  61 static int me_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc,
  62                       const char *parv[]);
  63
  64 struct Message xline_msgtab = {
  65         "XLINE", 0, 0, 0, 0,
  66         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  67 };
  68
  69 struct Message unxline_msgtab = {
  70         "UNXLINE", 0, 0, 0, 0,
  71         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  72 };
  73
  74 mapi_clist_av1 xline_clist[] = { &xline_msgtab, &unxline_msgtab, NULL };
  75
  76 DECLARE_MODULE_AV2(xline, NULL, NULL, xline_clist, NULL, NULL, NULL, NULL, NULL);
  77
  78 static int valid_xline(struct Client *, const char *, const char *);
  79 static void apply_xline(struct Client *client_p, const char *name,
  80                         const char *reason, int temp_time, int propagated);
  81 static void propagate_xline(struct Client *source_p, const char *target,
  82                             int temp_time, const char *name, const char *type, const char *reason);
  83 static void cluster_xline(struct Client *source_p, int temp_time,
  84                           const char *name, const char *reason);
  85
  86 static void handle_remote_xline(struct Client *source_p, int temp_time,
  87                                 const char *name, const char *reason);
  88 static void handle_remote_unxline(struct Client *source_p, const char *name);
  89
  90 static void remove_xline(struct Client *source_p, const char *name,
  91                          int propagated);
  92
  93
  94 /* m_xline()
  95  *
  96  * parv[1] - thing to xline
  97  * parv[2] - optional type/reason
  98  * parv[3] - reason
  99  */
 100 static int
 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         int 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 0;
 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 0;
 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 0;
 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 0;
 155
 156                 /* Set as local-only. */
 157                 propagated = 0;
 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 0;
 167         }
 168
 169         if(!valid_xline(source_p, name, reason))
 170                 return 0;
 171
 172         if(propagated && temp_time == 0)
 173         {
 174                 sendto_one_notice(source_p, ":Cannot set a permanent global ban");
 175                 return 0;
 176         }
 177
 178         apply_xline(source_p, name, reason, temp_time, propagated);
 179
 180         return 0;
 181 }
 182
 183 /* ms_xline()
 184  *
 185  * handles a remote xline
 186  */
 187 static int
 188 ms_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 189 {
 190         /* parv[0]  parv[1]      parv[2]  parv[3]  parv[4]
 191          * oper     target serv  xline    type     reason
 192          */
 193         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 194
 195         if(!IsPerson(source_p))
 196                 return 0;
 197
 198         /* destined for me? */
 199         if(!match(parv[1], me.name))
 200                 return 0;
 201
 202         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 203         return 0;
 204 }
 205
 206 static int
 207 me_xline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 208 {
 209         /* time name type :reason */
 210         if(!IsPerson(source_p))
 211                 return 0;
 212
 213         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 214         return 0;
 215 }
 216
 217 static void
 218 handle_remote_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 219 {
 220         struct ConfItem *aconf;
 221
 222         if(!find_shared_conf(source_p->username, source_p->host,
 223                              source_p->servptr->name,
 224                              (temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
 225                 return;
 226
 227         if(!valid_xline(source_p, name, reason))
 228                 return;
 229
 230         /* already xlined */
 231         if((aconf = find_xline_mask(name)) != NULL)
 232         {
 233                 sendto_one_notice(source_p, ":[%s] already X-Lined by [%s] - %s", name, aconf->host,
 234                                   aconf->passwd);
 235                 return;
 236         }
 237
 238         apply_xline(source_p, name, reason, temp_time, 0);
 239 }
 240
 241 /* valid_xline()
 242  *
 243  * inputs       - client xlining, gecos, reason and whether to warn
 244  * outputs      -
 245  * side effects - checks the xline for validity, erroring if needed
 246  */
 247 static int
 248 valid_xline(struct Client *source_p, const char *gecos, const char *reason)
 249 {
 250         if(EmptyString(reason))
 251         {
 252                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 253                            get_id(&me, source_p), get_id(source_p, source_p), "XLINE");
 254                 return 0;
 255         }
 256
 257         if(!valid_wild_card_simple(gecos))
 258         {
 259                 sendto_one_notice(source_p,
 260                                   ":Please include at least %d non-wildcard "
 261                                   "characters with the xline",
 262                                   ConfigFileEntry.min_nonwildcard_simple);
 263                 return 0;
 264         }
 265
 266         return 1;
 267 }
 268
 269 void
 270 apply_xline(struct Client *source_p, const char *name, const char *reason, int temp_time, int propagated)
 271 {
 272         struct ConfItem *aconf;
 273
 274         aconf = make_conf();
 275         aconf->status = CONF_XLINE;
 276         aconf->created = rb_current_time();
 277         aconf->host = rb_strdup(name);
 278         aconf->passwd = rb_strdup(reason);
 279         collapse(aconf->host);
 280
 281         aconf->info.oper = operhash_add(get_oper_name(source_p));
 282
 283         if(propagated)
 284         {
 285                 aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
 286                 aconf->hold = rb_current_time() + temp_time;
 287                 aconf->lifetime = aconf->hold;
 288
 289                 replace_old_ban(aconf);
 290                 rb_dlinkAddAlloc(aconf, &prop_bans);
 291
 292                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 293                                        "%s added global %d min. X-Line for [%s] [%s]",
 294                                        get_oper_name(source_p), temp_time / 60,
 295                                        aconf->host, reason);
 296                 ilog(L_KLINE, "X %s %d %s %s",
 297                      get_oper_name(source_p), temp_time / 60, name, reason);
 298                 sendto_one_notice(source_p, ":Added global %d min. X-Line [%s]",
 299                                   temp_time / 60, aconf->host);
 300                 sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 301                                 ":%s BAN X * %s %lu %d %d * :%s",
 302                                 source_p->id, aconf->host,
 303                                 (unsigned long)aconf->created,
 304                                 (int)(aconf->hold - aconf->created),
 305                                 (int)(aconf->lifetime - aconf->created),
 306                                 reason);
 307         }
 308         else if(temp_time > 0)
 309         {
 310                 aconf->hold = rb_current_time() + temp_time;
 311
 312                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 313                                        "%s added temporary %d min. X-Line for [%s] [%s]",
 314                                        get_oper_name(source_p), temp_time / 60,
 315                                        aconf->host, reason);
 316                 ilog(L_KLINE, "X %s %d %s %s",
 317                      get_oper_name(source_p), temp_time / 60, name, reason);
 318                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 319                                   temp_time / 60, aconf->host);
 320         }
 321         else
 322         {
 323                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 324                                        get_oper_name(source_p), aconf->host, aconf->passwd);
 325                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 326                                   aconf->host, aconf->passwd);
 327
 328                 bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, aconf->passwd, NULL, 0);
 329                 ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, aconf->passwd);
 330         }
 331
 332         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 333         check_xlines();
 334 }
 335
 336 static void
 337 propagate_xline(struct Client *source_p, const char *target,
 338                 int temp_time, const char *name, const char *type, const char *reason)
 339 {
 340         if(!temp_time)
 341         {
 342                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 343                                    "XLINE %s %s %s :%s", target, name, type, reason);
 344                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 345                                    "ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
 346         }
 347         else
 348                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 349                                    "ENCAP %s XLINE %d %s %s :%s",
 350                                    target, temp_time, name, type, reason);
 351 }
 352
 353 static void
 354 cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 355 {
 356         struct remote_conf *shared_p;
 357         rb_dlink_node *ptr;
 358
 359         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 360         {
 361                 shared_p = ptr->data;
 362
 363                 /* old protocol cant handle temps, and we dont really want
 364                  * to convert them to perm.. --fl
 365                  */
 366                 if(!temp_time)
 367                 {
 368                         if(!(shared_p->flags & SHARED_PXLINE))
 369                                 continue;
 370
 371                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 372                                            "XLINE %s %s 2 :%s", shared_p->server, name, reason);
 373                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 374                                            "ENCAP %s XLINE 0 %s 2 :%s",
 375                                            shared_p->server, name, reason);
 376                 }
 377                 else if(shared_p->flags & SHARED_TXLINE)
 378                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 379                                            "ENCAP %s XLINE %d %s 2 :%s",
 380                                            shared_p->server, temp_time, name, reason);
 381         }
 382 }
 383
 384 /* mo_unxline()
 385  *
 386  * parv[1] - thing to unxline
 387  */
 388 static int
 389 mo_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 390 {
 391         int propagated = 1;
 392
 393         if(!IsOperXline(source_p))
 394         {
 395                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 396                 return 0;
 397         }
 398
 399         if(parc == 4 && !(irccmp(parv[2], "ON")))
 400         {
 401                 if(!IsOperRemoteBan(source_p))
 402                 {
 403                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 404                                    me.name, source_p->name, "remoteban");
 405                         return 0;
 406                 }
 407
 408                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
 409
 410                 if(match(parv[3], me.name) == 0)
 411                         return 0;
 412
 413                 propagated = 0;
 414         }
 415         /* cluster{} moved to remove_xline */
 416
 417         remove_xline(source_p, parv[1], propagated);
 418
 419         return 0;
 420 }
 421
 422 /* ms_unxline()
 423  *
 424  * handles a remote unxline
 425  */
 426 static int
 427 ms_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 428 {
 429         /* parv[0]  parv[1]        parv[2]
 430          * oper     target server  gecos
 431          */
 432         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
 433
 434         if(!match(parv[1], me.name))
 435                 return 0;
 436
 437         if(!IsPerson(source_p))
 438                 return 0;
 439
 440         handle_remote_unxline(source_p, parv[2]);
 441         return 0;
 442 }
 443
 444 static int
 445 me_unxline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 446 {
 447         /* name */
 448         if(!IsPerson(source_p))
 449                 return 0;
 450
 451         handle_remote_unxline(source_p, parv[1]);
 452         return 0;
 453 }
 454
 455 static void
 456 handle_remote_unxline(struct Client *source_p, const char *name)
 457 {
 458         if(!find_shared_conf(source_p->username, source_p->host,
 459                              source_p->servptr->name, SHARED_UNXLINE))
 460                 return;
 461
 462         remove_xline(source_p, name, 0);
 463
 464         return;
 465 }
 466
 467 static void
 468 remove_xline(struct Client *source_p, const char *name, int propagated)
 469 {
 470         struct ConfItem *aconf;
 471         rb_dlink_node *ptr;
 472         time_t now;
 473
 474         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 475         {
 476                 aconf = ptr->data;
 477
 478                 if(!irccmp(aconf->host, name))
 479                 {
 480                         if(aconf->lifetime)
 481                         {
 482                                 if(!propagated)
 483                                 {
 484                                         sendto_one_notice(source_p, ":Cannot remove global X-Line %s on specific servers", name);
 485                                         return;
 486                                 }
 487                                 ptr = rb_dlinkFind(aconf, &prop_bans);
 488                                 if(ptr == NULL)
 489                                         return;
 490                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 491                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 492                                                        "%s has removed the global X-Line for: [%s]",
 493                                                        get_oper_name(source_p), name);
 494                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 495                                 now = rb_current_time();
 496                                 if(aconf->created < now)
 497                                         aconf->created = now;
 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, now);
 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 }