modules/m_resv.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_resv.c: Reserves(jupes) a nickname or channel.
   4  *
   5  *  Copyright (C) 2001-2002 Hybrid Development Team
   6  *  Copyright (C) 2002-2005 ircd-ratbox development team
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  21  *  USA
  22  *
  23  *  $Id: m_resv.c 3045 2006-12-26 23:16:57Z jilles $
  24  */
  25
  26 #include "stdinc.h"
  27 #include "client.h"
  28 #include "channel.h"
  29 #include "ircd.h"
  30 #include "numeric.h"
  31 #include "s_serv.h"
  32 #include "send.h"
  33 #include "msg.h"
  34 #include "parse.h"
  35 #include "modules.h"
  36 #include "s_conf.h"
  37 #include "s_newconf.h"
  38 #include "hash.h"
  39 #include "logger.h"
  40
  41 static int mo_resv(struct Client *, struct Client *, int, const char **);
  42 static int ms_resv(struct Client *, struct Client *, int, const char **);
  43 static int me_resv(struct Client *, struct Client *, int, const char **);
  44 static int mo_unresv(struct Client *, struct Client *, int, const char **);
  45 static int ms_unresv(struct Client *, struct Client *, int, const char **);
  46 static int me_unresv(struct Client *, struct Client *, int, const char **);
  47
  48 struct Message resv_msgtab = {
  49         "RESV", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
  50         {mg_ignore, mg_not_oper, {ms_resv, 4}, {ms_resv, 4}, {me_resv, 5}, {mo_resv, 3}}
  51 };
  52 struct Message unresv_msgtab = {
  53         "UNRESV", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
  54         {mg_ignore, mg_not_oper, {ms_unresv, 3}, {ms_unresv, 3}, {me_unresv, 2}, {mo_unresv, 2}}
  55 };
  56
  57 mapi_clist_av1 resv_clist[] = { &resv_msgtab, &unresv_msgtab, NULL };
  58 DECLARE_MODULE_AV1(resv, NULL, NULL, resv_clist, NULL, NULL, "$Revision: 3045 $");
  59
  60 static void parse_resv(struct Client *source_p, const char *name,
  61                         const char *reason, int temp_time);
  62 static void propagate_resv(struct Client *source_p, const char *target,
  63                         int temp_time, const char *name, const char *reason);
  64 static void cluster_resv(struct Client *source_p, int temp_time,
  65                         const char *name, const char *reason);
  66
  67 static void handle_remote_unresv(struct Client *source_p, const char *name);
  68 static void remove_resv(struct Client *source_p, const char *name);
  69 static int remove_resv_from_file(struct Client *source_p, const char *name);
  70 static void resv_chan_forcepart(const char *name, const char *reason, int temp_time);
  71
  72 /*
  73  * mo_resv()
  74  *      parv[1] = channel/nick to forbid
  75  *      parv[2] = reason
  76  */
  77 static int
  78 mo_resv(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  79 {
  80         const char *name;
  81         const char *reason;
  82         const char *target_server = NULL;
  83         int temp_time;
  84         int loc = 1;
  85
  86         if(!IsOperResv(source_p))
  87         {
  88                 sendto_one(source_p, form_str(ERR_NOPRIVS),
  89                            me.name, source_p->name, "resv");
  90                 return 0;
  91         }
  92
  93         /* RESV [time] <name> [ON <server>] :<reason> */
  94
  95         if((temp_time = valid_temp_time(parv[loc])) >= 0)
  96                 loc++;
  97         /* we just set temp_time to -1! */
  98         else
  99                 temp_time = 0;
 100
 101         name = parv[loc];
 102         loc++;
 103
 104         if((parc >= loc+2) && (irccmp(parv[loc], "ON") == 0))
 105         {
 106                 if(!IsOperRemoteBan(source_p))
 107                 {
 108                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 109                                 me.name, source_p->name, "remoteban");
 110                         return 0;
 111                 }
 112
 113                 target_server = parv[loc+1];
 114                 loc += 2;
 115         }
 116
 117         if(parc <= loc || EmptyString(parv[loc]))
 118         {
 119                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 120                            me.name, source_p->name, "RESV");
 121                 return 0;
 122         }
 123
 124         reason = parv[loc];
 125
 126         /* remote resv.. */
 127         if(target_server)
 128         {
 129                 propagate_resv(source_p, target_server, temp_time, name, reason);
 130
 131                 if(match(target_server, me.name) == 0)
 132                         return 0;
 133         }
 134         else if(rb_dlink_list_length(&cluster_conf_list) > 0)
 135                 cluster_resv(source_p, temp_time, name, reason);
 136
 137         parse_resv(source_p, name, reason, temp_time);
 138
 139         return 0;
 140 }
 141
 142 /* ms_resv()
 143  *     parv[1] = target server
 144  *     parv[2] = channel/nick to forbid
 145  *     parv[3] = reason
 146  */
 147 static int
 148 ms_resv(struct Client *client_p, struct Client *source_p,
 149         int parc, const char *parv[])
 150 {
 151         /* source_p  parv[1]        parv[2]  parv[3]
 152          * oper      target server  resv     reason
 153          */
 154         propagate_resv(source_p, parv[1], 0, parv[2], parv[3]);
 155
 156         if(!match(parv[1], me.name))
 157                 return 0;
 158
 159         if(!IsPerson(source_p))
 160                 return 0;
 161
 162         parse_resv(source_p, parv[2], parv[3], 0);
 163         return 0;
 164 }
 165
 166 static int
 167 me_resv(struct Client *client_p, struct Client *source_p,
 168         int parc, const char *parv[])
 169 {
 170         /* time name 0 :reason */
 171         if(!IsPerson(source_p))
 172                 return 0;
 173
 174         parse_resv(source_p, parv[2], parv[4], atoi(parv[1]));
 175         return 0;
 176 }
 177
 178 /* parse_resv()
 179  *
 180  * inputs       - source_p if error messages wanted
 181  *              - thing to resv
 182  *              - reason for resv
 183  * outputs      -
 184  * side effects - will parse the resv and create it if valid
 185  */
 186 static void
 187 parse_resv(struct Client *source_p, const char *name,
 188            const char *reason, int temp_time)
 189 {
 190         struct ConfItem *aconf;
 191
 192         if(!MyClient(source_p) &&
 193            !find_shared_conf(source_p->username, source_p->host,
 194                         source_p->servptr->name,
 195                         (temp_time > 0) ? SHARED_TRESV : SHARED_PRESV))
 196                 return;
 197
 198         if(IsChannelName(name))
 199         {
 200                 if(hash_find_resv(name))
 201                 {
 202                         sendto_one_notice(source_p,
 203                                         ":A RESV has already been placed on channel: %s",
 204                                         name);
 205                         return;
 206                 }
 207
 208                 if(strlen(name) > CHANNELLEN)
 209                 {
 210                         sendto_one_notice(source_p, ":Invalid RESV length: %s",
 211                                           name);
 212                         return;
 213                 }
 214
 215                 if(strchr(name, ','))
 216                 {
 217                         sendto_one_notice(source_p,
 218                                         ":Invalid character ',' in channel RESV");
 219                         return;
 220                 }
 221
 222                 if(strchr(reason, '"'))
 223                 {
 224                         sendto_one_notice(source_p,
 225                                         ":Invalid character '\"' in comment");
 226                         return;
 227                 }
 228
 229                 aconf = make_conf();
 230                 aconf->status = CONF_RESV_CHANNEL;
 231                 aconf->port = 0;
 232                 aconf->name = rb_strdup(name);
 233                 aconf->passwd = rb_strdup(reason);
 234                 add_to_resv_hash(aconf->name, aconf);
 235                 resv_chan_forcepart(aconf->name, aconf->passwd, temp_time);
 236
 237                 if(temp_time > 0)
 238                 {
 239                         aconf->hold = rb_current_time() + temp_time;
 240
 241                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 242                                      "%s added temporary %d min. RESV for [%s] [%s]",
 243                                      get_oper_name(source_p), temp_time / 60,
 244                                      name, reason);
 245                         ilog(L_KLINE, "R %s %d %s %s",
 246                                 get_oper_name(source_p), temp_time / 60,
 247                                 name, reason);
 248                         sendto_one_notice(source_p, ":Added temporary %d min. RESV [%s]",
 249                                         temp_time / 60, name);
 250                 }
 251                 else
 252                         write_confitem(RESV_TYPE, source_p, NULL, aconf->name,
 253                                         aconf->passwd, NULL, NULL, 0);
 254         }
 255         else if(clean_resv_nick(name))
 256         {
 257                 if(strlen(name) > NICKLEN*2)
 258                 {
 259                         sendto_one_notice(source_p, ":Invalid RESV length: %s",
 260                                            name);
 261                         return;
 262                 }
 263
 264                 if(strchr(reason, '"'))
 265                 {
 266                         sendto_one_notice(source_p,
 267                                         ":Invalid character '\"' in comment");
 268                         return;
 269                 }
 270
 271                 if(!valid_wild_card_simple(name))
 272                 {
 273                         sendto_one_notice(source_p,
 274                                            ":Please include at least %d non-wildcard "
 275                                            "characters with the resv",
 276                                            ConfigFileEntry.min_nonwildcard_simple);
 277                         return;
 278                 }
 279
 280                 if(find_nick_resv_mask(name))
 281                 {
 282                         sendto_one_notice(source_p,
 283                                            ":A RESV has already been placed on nick: %s",
 284                                            name);
 285                         return;
 286                 }
 287
 288                 aconf = make_conf();
 289                 aconf->status = CONF_RESV_NICK;
 290                 aconf->port = 0;
 291                 aconf->name = rb_strdup(name);
 292                 aconf->passwd = rb_strdup(reason);
 293                 rb_dlinkAddAlloc(aconf, &resv_conf_list);
 294
 295                 if(temp_time > 0)
 296                 {
 297                         aconf->hold = rb_current_time() + temp_time;
 298
 299                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 300                                      "%s added temporary %d min. RESV for [%s] [%s]",
 301                                      get_oper_name(source_p), temp_time / 60,
 302                                      name, reason);
 303                         ilog(L_KLINE, "R %s %d %s %s",
 304                                 get_oper_name(source_p), temp_time / 60,
 305                                 name, reason);
 306                         sendto_one_notice(source_p, ":Added temporary %d min. RESV [%s]",
 307                                         temp_time / 60, name);
 308                 }
 309                 else
 310                         write_confitem(RESV_TYPE, source_p, NULL, aconf->name,
 311                                         aconf->passwd, NULL, NULL, 0);
 312         }
 313         else
 314                 sendto_one_notice(source_p,
 315                                   ":You have specified an invalid resv: [%s]",
 316                                   name);
 317 }
 318
 319 static void
 320 propagate_resv(struct Client *source_p, const char *target,
 321                 int temp_time, const char *name, const char *reason)
 322 {
 323         if(!temp_time)
 324         {
 325                 sendto_match_servs(source_p, target,
 326                                 CAP_CLUSTER, NOCAPS,
 327                                 "RESV %s %s :%s",
 328                                 target, name, reason);
 329                 sendto_match_servs(source_p, target,
 330                                 CAP_ENCAP, CAP_CLUSTER,
 331                                 "ENCAP %s RESV %d %s 0 :%s",
 332                                 target, temp_time, name, reason);
 333         }
 334         else
 335                 sendto_match_servs(source_p, target,
 336                                 CAP_ENCAP, NOCAPS,
 337                                 "ENCAP %s RESV %d %s 0 :%s",
 338                                 target, temp_time, name, reason);
 339 }
 340
 341 static void
 342 cluster_resv(struct Client *source_p, int temp_time, const char *name,
 343                 const char *reason)
 344 {
 345         struct remote_conf *shared_p;
 346         rb_dlink_node *ptr;
 347
 348         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 349         {
 350                 shared_p = ptr->data;
 351
 352                 /* old protocol cant handle temps, and we dont really want
 353                  * to convert them to perm.. --fl
 354                  */
 355                 if(!temp_time)
 356                 {
 357                         if(!(shared_p->flags & SHARED_PRESV))
 358                                 continue;
 359
 360                         sendto_match_servs(source_p, shared_p->server,
 361                                         CAP_CLUSTER, NOCAPS,
 362                                         "RESV %s %s :%s",
 363                                         shared_p->server, name, reason);
 364                         sendto_match_servs(source_p, shared_p->server,
 365                                         CAP_ENCAP, CAP_CLUSTER,
 366                                         "ENCAP %s RESV 0 %s 0 :%s",
 367                                         shared_p->server, name, reason);
 368                 }
 369                 else if(shared_p->flags & SHARED_TRESV)
 370                         sendto_match_servs(source_p, shared_p->server,
 371                                         CAP_ENCAP, NOCAPS,
 372                                         "ENCAP %s RESV %d %s 0 :%s",
 373                                         shared_p->server, temp_time, name, reason);
 374         }
 375 }
 376
 377
 378 /*
 379  * mo_unresv()
 380  *     parv[1] = channel/nick to unforbid
 381  */
 382 static int
 383 mo_unresv(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 384 {
 385         if(!IsOperResv(source_p))
 386         {
 387                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 388                            me.name, source_p->name, "resv");
 389                 return 0;
 390         }
 391
 392         if((parc == 4) && (irccmp(parv[2], "ON") == 0))
 393         {
 394                 if(!IsOperRemoteBan(source_p))
 395                 {
 396                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 397                                 me.name, source_p->name, "remoteban");
 398                         return 0;
 399                 }
 400
 401                 propagate_generic(source_p, "UNRESV", parv[3], CAP_CLUSTER,
 402                                 "%s", parv[1]);
 403
 404                 if(match(parv[3], me.name) == 0)
 405                         return 0;
 406         }
 407         else if(rb_dlink_list_length(&cluster_conf_list) > 0)
 408                 cluster_generic(source_p, "UNRESV", SHARED_UNRESV, CAP_CLUSTER,
 409                                 "%s", parv[1]);
 410
 411         remove_resv(source_p, parv[1]);
 412         return 0;
 413 }
 414
 415 /* ms_unresv()
 416  *     parv[1] = target server
 417  *     parv[2] = resv to remove
 418  */
 419 static int
 420 ms_unresv(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 421 {
 422         /* source_p  parv[1]        parv[2]
 423          * oper      target server  resv to remove
 424          */
 425         propagate_generic(source_p, "UNRESV", parv[1], CAP_CLUSTER,
 426                         "%s", parv[2]);
 427
 428         if(!match(parv[1], me.name))
 429                 return 0;
 430
 431         if(!IsPerson(source_p))
 432                 return 0;
 433
 434         handle_remote_unresv(source_p, parv[2]);
 435         return 0;
 436 }
 437
 438 static int
 439 me_unresv(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 440 {
 441         /* name */
 442         if(!IsPerson(source_p))
 443                 return 0;
 444
 445         handle_remote_unresv(source_p, parv[1]);
 446         return 0;
 447 }
 448
 449 static void
 450 handle_remote_unresv(struct Client *source_p, const char *name)
 451 {
 452         if(!find_shared_conf(source_p->username, source_p->host,
 453                                 source_p->servptr->name, SHARED_UNRESV))
 454                 return;
 455
 456         remove_resv(source_p, name);
 457
 458         return;
 459 }
 460
 461 static void
 462 remove_resv(struct Client *source_p, const char *name)
 463 {
 464         struct ConfItem *aconf = NULL;
 465
 466         if(IsChannelName(name))
 467         {
 468                 if((aconf = hash_find_resv(name)) == NULL)
 469                 {
 470                         sendto_one_notice(source_p, ":No RESV for %s", name);
 471                         return;
 472                 }
 473
 474                 if(!aconf->hold)
 475                 {
 476                         if (!remove_resv_from_file(source_p, name))
 477                                 return;
 478                 }
 479                 else
 480                 {
 481                         sendto_one_notice(source_p, ":RESV for [%s] is removed", name);
 482                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 483                                         "%s has removed the RESV for: [%s]",
 484                                         get_oper_name(source_p), name);
 485                         ilog(L_KLINE, "UR %s %s", get_oper_name(source_p), name);
 486                 }
 487                 del_from_resv_hash(name, aconf);
 488         }
 489         else
 490         {
 491                 rb_dlink_node *ptr;
 492
 493                 RB_DLINK_FOREACH(ptr, resv_conf_list.head)
 494                 {
 495                         aconf = ptr->data;
 496
 497                         if(irccmp(aconf->name, name))
 498                                 aconf = NULL;
 499                         else
 500                                 break;
 501                 }
 502
 503                 if(aconf == NULL)
 504                 {
 505                         sendto_one_notice(source_p, ":No RESV for %s", name);
 506                         return;
 507                 }
 508
 509                 if(!aconf->hold)
 510                 {
 511                         if (!remove_resv_from_file(source_p, name))
 512                                 return;
 513                 }
 514                 else
 515                 {
 516                         sendto_one_notice(source_p, ":RESV for [%s] is removed", name);
 517                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 518                                         "%s has removed the RESV for: [%s]",
 519                                         get_oper_name(source_p), name);
 520                         ilog(L_KLINE, "UR %s %s", get_oper_name(source_p), name);
 521                 }
 522                 /* already have ptr from the loop above.. */
 523                 rb_dlinkDestroy(ptr, &resv_conf_list);
 524         }
 525         free_conf(aconf);
 526
 527         return;
 528 }
 529
 530 /* remove_resv_from_file()
 531  *
 532  * inputs       - client removing the resv
 533  *              - resv to remove
 534  * outputs      -
 535  * side effects - resv if found, is removed from conf
 536  *              - does not touch resv hash or resv_conf_list
 537  */
 538 static int
 539 remove_resv_from_file(struct Client *source_p, const char *name)
 540 {
 541         FILE *in, *out;
 542         char buf[BUFSIZE];
 543         char buff[BUFSIZE];
 544         char temppath[BUFSIZE];
 545         const char *filename;
 546         mode_t oldumask;
 547         char *p;
 548         int error_on_write = 0;
 549         int found_resv = 0;
 550
 551         rb_sprintf(temppath, "%s.tmp", ConfigFileEntry.resvfile);
 552         filename = get_conf_name(RESV_TYPE);
 553
 554         if((in = fopen(filename, "r")) == NULL)
 555         {
 556                 sendto_one_notice(source_p, ":Cannot open %s", filename);
 557                 return 0;
 558         }
 559
 560         oldumask = umask(0);
 561
 562         if((out = fopen(temppath, "w")) == NULL)
 563         {
 564                 sendto_one_notice(source_p, ":Cannot open %s", temppath);
 565                 fclose(in);
 566                 umask(oldumask);
 567                 return 0;
 568         }
 569
 570         umask(oldumask);
 571
 572         while (fgets(buf, sizeof(buf), in))
 573         {
 574                 const char *resv_name;
 575
 576                 if(error_on_write)
 577                 {
 578                         if(temppath != NULL)
 579                                 (void) unlink(temppath);
 580
 581                         break;
 582                 }
 583
 584                 rb_strlcpy(buff, buf, sizeof(buff));
 585
 586                 if((p = strchr(buff, '\n')) != NULL)
 587                         *p = '\0';
 588
 589                 if((*buff == '\0') || (*buff == '#'))
 590                 {
 591                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 592                         continue;
 593                 }
 594
 595                 if((resv_name = getfield(buff)) == NULL)
 596                 {
 597                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 598                         continue;
 599                 }
 600
 601                 if(irccmp(resv_name, name) == 0)
 602                 {
 603                         found_resv++;
 604                 }
 605                 else
 606                 {
 607                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 608                 }
 609         }
 610
 611         fclose(in);
 612         if (fclose(out))
 613                 error_on_write = YES;
 614
 615         if(error_on_write)
 616         {
 617                 sendto_one_notice(source_p, ":Couldn't write temp resv file, aborted");
 618                 return 0;
 619         }
 620         else if(!found_resv)
 621         {
 622                 sendto_one_notice(source_p, ":Cannot find RESV for %s in file", name);
 623
 624                 if(temppath != NULL)
 625                         (void) unlink(temppath);
 626
 627                 return 0;
 628         }
 629
 630         if (rename(temppath, filename))
 631         {
 632                 sendto_one_notice(source_p, ":Couldn't rename temp file, aborted");
 633                 return 0;
 634         }
 635
 636         sendto_one_notice(source_p, ":RESV for [%s] is removed", name);
 637         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 638                              "%s has removed the RESV for: [%s]", get_oper_name(source_p), name);
 639         ilog(L_KLINE, "UR %s %s", get_oper_name(source_p), name);
 640
 641         return 1;
 642 }
 643
 644 static void
 645 resv_chan_forcepart(const char *name, const char *reason, int temp_time)
 646 {
 647         rb_dlink_node *ptr;
 648         rb_dlink_node *next_ptr;
 649         struct Channel *chptr;
 650         struct membership *msptr;
 651         struct Client *target_p;
 652
 653         if(!ConfigChannel.resv_forcepart)
 654                 return;
 655
 656         /* for each user on our server in the channel list
 657          * send them a PART, and notify opers.
 658          */
 659         chptr = find_channel(name);
 660         if(chptr != NULL)
 661         {
 662                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
 663                 {
 664                         msptr = ptr->data;
 665                         target_p = msptr->client_p;
 666
 667                         if(IsExemptResv(target_p))
 668                                 continue;
 669
 670                         sendto_server(target_p, chptr, CAP_TS6, NOCAPS,
 671                                       ":%s PART %s", target_p->id, chptr->chname);
 672
 673                         sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s PART %s :%s",
 674                                              target_p->name, target_p->username,
 675                                              target_p->host, chptr->chname, target_p->name);
 676
 677                         remove_user_from_channel(msptr);
 678
 679                         /* notify opers & user they were removed from the channel */
 680                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 681                                              "Forced PART for %s!%s@%s from %s (%s)",
 682                                              target_p->name, target_p->username,
 683                                              target_p->host, name, reason);
 684
 685                         if(temp_time > 0)
 686                                 sendto_one_notice(target_p, ":*** Channel %s is temporarily unavailable on this server.",
 687                                            name);
 688                         else
 689                                 sendto_one_notice(target_p, ":*** Channel %s is no longer available on this server.",
 690                                            name);
 691                 }
 692         }
 693 }