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
  55 static int mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  56 static int ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  57 static int me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  58 static int mo_unxline(struct Client *client_p, struct Client *source_p, int parc,
  59                       const char *parv[]);
  60 static int ms_unxline(struct Client *client_p, struct Client *source_p, int parc,
  61                       const char *parv[]);
  62 static int me_unxline(struct Client *client_p, struct Client *source_p, int parc,
  63                       const char *parv[]);
  64
  65 struct Message xline_msgtab = {
  66         "XLINE", 0, 0, 0, MFLG_SLOW,
  67         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  68 };
  69
  70 struct Message unxline_msgtab = {
  71         "UNXLINE", 0, 0, 0, MFLG_SLOW,
  72         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  73 };
  74
  75 mapi_clist_av1 xline_clist[] = { &xline_msgtab, &unxline_msgtab, NULL };
  76
  77 DECLARE_MODULE_AV1(xline, NULL, NULL, xline_clist, NULL, NULL, "$Revision$");
  78
  79 static int valid_xline(struct Client *, const char *, const char *);
  80 static void apply_xline(struct Client *client_p, const char *name,
  81                         const char *reason, int temp_time);
  82 static void propagate_xline(struct Client *source_p, const char *target,
  83                             int temp_time, const char *name, const char *type, const char *reason);
  84 static void cluster_xline(struct Client *source_p, int temp_time,
  85                           const char *name, const char *reason);
  86
  87 static void handle_remote_xline(struct Client *source_p, int temp_time,
  88                                 const char *name, const char *reason);
  89 static void handle_remote_unxline(struct Client *source_p, const char *name);
  90
  91 static void remove_xline(struct Client *source_p, const char *name);
  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 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
 110         if(!IsOperXline(source_p))
 111         {
 112                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 113                 return 0;
 114         }
 115
 116         if((temp_time = valid_temp_time(parv[loc])) >= 0)
 117                 loc++;
 118         /* we just set temp_time to -1! */
 119         else
 120                 temp_time = 0;
 121
 122         name = parv[loc];
 123         loc++;
 124
 125         /* XLINE <gecos> ON <server> :<reason> */
 126         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 127         {
 128                 if(!IsOperRemoteBan(source_p))
 129                 {
 130                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 131                                    me.name, source_p->name, "remoteban");
 132                         return 0;
 133                 }
 134
 135                 target_server = parv[loc + 1];
 136                 loc += 2;
 137         }
 138
 139         if(parc <= loc || EmptyString(parv[loc]))
 140         {
 141                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 142                            me.name, source_p->name, "XLINE");
 143                 return 0;
 144         }
 145
 146         reason = parv[loc];
 147
 148         if(target_server != NULL)
 149         {
 150                 propagate_xline(source_p, target_server, temp_time, name, "2", reason);
 151
 152                 if(!match(target_server, me.name))
 153                         return 0;
 154         }
 155         else if(rb_dlink_list_length(&cluster_conf_list) > 0)
 156                 cluster_xline(source_p, temp_time, name, reason);
 157
 158         if((aconf = find_xline_mask(name)) != NULL)
 159         {
 160                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 161                            me.name, source_p->name, name, aconf->name, aconf->passwd);
 162                 return 0;
 163         }
 164
 165         if(!valid_xline(source_p, name, reason))
 166                 return 0;
 167
 168         apply_xline(source_p, name, reason, temp_time);
 169
 170         return 0;
 171 }
 172
 173 /* ms_xline()
 174  *
 175  * handles a remote xline
 176  */
 177 static int
 178 ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 179 {
 180         /* parv[0]  parv[1]      parv[2]  parv[3]  parv[4]
 181          * oper     target serv  xline    type     reason
 182          */
 183         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 184
 185         if(!IsPerson(source_p))
 186                 return 0;
 187
 188         /* destined for me? */
 189         if(!match(parv[1], me.name))
 190                 return 0;
 191
 192         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 193         return 0;
 194 }
 195
 196 static int
 197 me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 198 {
 199         /* time name type :reason */
 200         if(!IsPerson(source_p))
 201                 return 0;
 202
 203         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 204         return 0;
 205 }
 206
 207 static void
 208 handle_remote_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 209 {
 210         struct ConfItem *aconf;
 211
 212         if(!find_shared_conf(source_p->username, source_p->host,
 213                              source_p->servptr->name,
 214                              (temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
 215                 return;
 216
 217         if(!valid_xline(source_p, name, reason))
 218                 return;
 219
 220         /* already xlined */
 221         if((aconf = find_xline_mask(name)) != NULL)
 222         {
 223                 sendto_one_notice(source_p, ":[%s] already X-Lined by [%s] - %s", name, aconf->name,
 224                                   aconf->passwd);
 225                 return;
 226         }
 227
 228         apply_xline(source_p, name, reason, temp_time);
 229 }
 230
 231 /* valid_xline()
 232  *
 233  * inputs       - client xlining, gecos, reason and whether to warn
 234  * outputs      -
 235  * side effects - checks the xline for validity, erroring if needed
 236  */
 237 static int
 238 valid_xline(struct Client *source_p, const char *gecos, const char *reason)
 239 {
 240         if(EmptyString(reason))
 241         {
 242                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 243                            get_id(&me, source_p), get_id(source_p, source_p), "XLINE");
 244                 return 0;
 245         }
 246
 247         if(strchr(reason, ':') != NULL)
 248         {
 249                 sendto_one_notice(source_p, ":Invalid character ':' in comment");
 250                 return 0;
 251         }
 252
 253         if(strchr(reason, '"'))
 254         {
 255                 sendto_one_notice(source_p, ":Invalid character '\"' in comment");
 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)
 273 {
 274         struct ConfItem *aconf;
 275
 276         aconf = make_conf();
 277         aconf->status = CONF_XLINE;
 278
 279         if(strstr(name, "\\s"))
 280         {
 281                 char *tmp = LOCAL_COPY(name);
 282                 char *orig = tmp;
 283                 char *new = tmp;
 284
 285                 while(*orig)
 286                 {
 287                         if(*orig == '\\' && *(orig + 1) != '\0')
 288                         {
 289                                 if(*(orig + 1) == 's')
 290                                 {
 291                                         *new++ = ' ';
 292                                         orig += 2;
 293                                 }
 294                                 /* otherwise skip that and the escaped
 295                                  * character after it, so we dont mistake
 296                                  * \\s as \s --fl
 297                                  */
 298                                 else
 299                                 {
 300                                         *new++ = *orig++;
 301                                         *new++ = *orig++;
 302                                 }
 303                         }
 304                         else
 305                                 *new++ = *orig++;
 306                 }
 307
 308                 *new = '\0';
 309                 aconf->name = rb_strdup(tmp);
 310         }
 311         else
 312                 aconf->name = rb_strdup(name);
 313
 314         aconf->passwd = rb_strdup(reason);
 315         collapse(aconf->name);
 316
 317         if(temp_time > 0)
 318         {
 319                 aconf->hold = rb_current_time() + temp_time;
 320
 321                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 322                                        "%s added temporary %d min. X-Line for [%s] [%s]",
 323                                        get_oper_name(source_p), temp_time / 60,
 324                                        aconf->name, reason);
 325                 ilog(L_KLINE, "X %s %d %s %s",
 326                      get_oper_name(source_p), temp_time / 60, name, reason);
 327                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 328                                   temp_time / 60, aconf->name);
 329         }
 330         else
 331         {
 332                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 333                                        get_oper_name(source_p), aconf->name, aconf->passwd);
 334                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 335                                   aconf->name, aconf->passwd);
 336
 337                 bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, reason, NULL, 0);
 338                 ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, reason);
 339         }
 340
 341         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 342         check_xlines();
 343 }
 344
 345 static void
 346 propagate_xline(struct Client *source_p, const char *target,
 347                 int temp_time, const char *name, const char *type, const char *reason)
 348 {
 349         if(!temp_time)
 350         {
 351                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 352                                    "XLINE %s %s %s :%s", target, name, type, reason);
 353                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 354                                    "ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
 355         }
 356         else
 357                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 358                                    "ENCAP %s XLINE %d %s %s :%s",
 359                                    target, temp_time, name, type, reason);
 360 }
 361
 362 static void
 363 cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
 364 {
 365         struct remote_conf *shared_p;
 366         rb_dlink_node *ptr;
 367
 368         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 369         {
 370                 shared_p = ptr->data;
 371
 372                 /* old protocol cant handle temps, and we dont really want
 373                  * to convert them to perm.. --fl
 374                  */
 375                 if(!temp_time)
 376                 {
 377                         if(!(shared_p->flags & SHARED_PXLINE))
 378                                 continue;
 379
 380                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 381                                            "XLINE %s %s 2 :%s", shared_p->server, name, reason);
 382                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 383                                            "ENCAP %s XLINE 0 %s 2 :%s",
 384                                            shared_p->server, name, reason);
 385                 }
 386                 else if(shared_p->flags & SHARED_TXLINE)
 387                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 388                                            "ENCAP %s XLINE %d %s 2 :%s",
 389                                            shared_p->server, temp_time, name, reason);
 390         }
 391 }
 392
 393 /* mo_unxline()
 394  *
 395  * parv[1] - thing to unxline
 396  */
 397 static int
 398 mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 399 {
 400         if(!IsOperXline(source_p))
 401         {
 402                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
 403                 return 0;
 404         }
 405
 406         if(parc == 4 && !(irccmp(parv[2], "ON")))
 407         {
 408                 if(!IsOperRemoteBan(source_p))
 409                 {
 410                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 411                                    me.name, source_p->name, "remoteban");
 412                         return 0;
 413                 }
 414
 415                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
 416
 417                 if(match(parv[3], me.name) == 0)
 418                         return 0;
 419         }
 420         else if(rb_dlink_list_length(&cluster_conf_list))
 421                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", parv[1]);
 422
 423         remove_xline(source_p, parv[1]);
 424
 425         return 0;
 426 }
 427
 428 /* ms_unxline()
 429  *
 430  * handles a remote unxline
 431  */
 432 static int
 433 ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 434 {
 435         /* parv[0]  parv[1]        parv[2]
 436          * oper     target server  gecos
 437          */
 438         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
 439
 440         if(!match(parv[1], me.name))
 441                 return 0;
 442
 443         if(!IsPerson(source_p))
 444                 return 0;
 445
 446         handle_remote_unxline(source_p, parv[2]);
 447         return 0;
 448 }
 449
 450 static int
 451 me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 452 {
 453         /* name */
 454         if(!IsPerson(source_p))
 455                 return 0;
 456
 457         handle_remote_unxline(source_p, parv[1]);
 458         return 0;
 459 }
 460
 461 static void
 462 handle_remote_unxline(struct Client *source_p, const char *name)
 463 {
 464         if(!find_shared_conf(source_p->username, source_p->host,
 465                              source_p->servptr->name, SHARED_UNXLINE))
 466                 return;
 467
 468         remove_xline(source_p, name);
 469
 470         return;
 471 }
 472
 473 static void
 474 remove_xline(struct Client *source_p, const char *name)
 475 {
 476         struct ConfItem *aconf;
 477         rb_dlink_node *ptr;
 478
 479         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 480         {
 481                 aconf = ptr->data;
 482
 483                 if(!irccmp(aconf->name, name))
 484                 {
 485                         if(!aconf->hold)
 486                         {
 487                                 bandb_del(BANDB_XLINE, aconf->host, NULL);
 488
 489                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", aconf->host);
 490                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 491                                                        "%s has removed the X-Line for: [%s]",
 492                                                        get_oper_name(source_p), aconf->host);
 493                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), aconf->host);
 494                         }
 495                         else
 496                         {
 497                                 sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
 498                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 499                                                        "%s has removed the temporary X-Line for: [%s]",
 500                                                        get_oper_name(source_p), name);
 501                                 ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
 502                         }
 503
 504                         remove_reject_mask(aconf->name, NULL);
 505                         free_conf(aconf);
 506                         rb_dlinkDestroy(ptr, &xline_conf_list);
 507                         return;
 508                 }
 509         }
 510
 511         sendto_one_notice(source_p, ":No X-Line for %s", name);
 512
 513         return;
 514 }