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: m_xline.c 23291 2006-11-27 11:44:20Z jilles $
  31  */
  32
  33 #include "stdinc.h"
  34 #include "tools.h"
  35 #include "send.h"
  36 #include "channel.h"
  37 #include "client.h"
  38 #include "common.h"
  39 #include "config.h"
  40 #include "class.h"
  41 #include "ircd.h"
  42 #include "numeric.h"
  43 #include "memory.h"
  44 #include "s_log.h"
  45 #include "s_serv.h"
  46 #include "whowas.h"
  47 #include "irc_string.h"
  48 #include "sprintf_irc.h"
  49 #include "hash.h"
  50 #include "msg.h"
  51 #include "parse.h"
  52 #include "modules.h"
  53 #include "s_conf.h"
  54 #include "s_newconf.h"
  55
  56 static int mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  57 static int ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  58 static int me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  59 static int mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  60 static int ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  61 static int me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  62
  63 struct Message xline_msgtab = {
  64         "XLINE", 0, 0, 0, MFLG_SLOW,
  65         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  66 };
  67 struct Message unxline_msgtab = {
  68         "UNXLINE", 0, 0, 0, MFLG_SLOW,
  69         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  70 };
  71
  72 mapi_clist_av1 xline_clist[] =  { &xline_msgtab, &unxline_msgtab, NULL };
  73 DECLARE_MODULE_AV1(xline, NULL, NULL, xline_clist, NULL, NULL, "$Revision: 23291 $");
  74
  75 static int valid_xline(struct Client *, const char *, const char *, int temp);
  76 static void apply_xline(struct Client *client_p, const char *name,
  77                         const char *reason, int temp_time);
  78 static void write_xline(struct Client *source_p, struct ConfItem *aconf);
  79 static void propagate_xline(struct Client *source_p, const char *target,
  80                         int temp_time, const char *name,
  81                         const char *type, const char *reason);
  82 static void cluster_xline(struct Client *source_p, int temp_time,
  83                         const char *name, const char *reason);
  84
  85 static void handle_remote_xline(struct Client *source_p, int temp_time,
  86                                 const char *name, const char *reason);
  87 static void handle_remote_unxline(struct Client *source_p, const char *name);
  88
  89 static int remove_temp_xline(struct Client *source_p, const char *name);
  90 static void remove_xline(struct Client *source_p, const char *gecos);
  91
  92
  93 /* m_xline()
  94  *
  95  * parv[1] - thing to xline
  96  * parv[2] - optional type/reason
  97  * parv[3] - reason
  98  */
  99 static int
 100 mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 101 {
 102         struct ConfItem *aconf;
 103         const char *name;
 104         const char *reason;
 105         const char *target_server = NULL;
 106         int temp_time;
 107         int loc = 1;
 108
 109         if(!IsOperXline(source_p))
 110         {
 111                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 112                            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,
 151                                 name, "2", reason);
 152
 153                 if(!match(target_server, me.name))
 154                         return 0;
 155         }
 156         else if(dlink_list_length(&cluster_conf_list) > 0)
 157                 cluster_xline(source_p, temp_time, name, reason);
 158
 159         if((aconf = find_xline(name, 0)) != NULL)
 160         {
 161                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 162                            me.name, source_p->name, parv[1], aconf->name, aconf->passwd);
 163                 return 0;
 164         }
 165
 166         if(!valid_xline(source_p, name, reason, temp_time))
 167                 return 0;
 168
 169         apply_xline(source_p, name, reason, temp_time);
 170
 171         return 0;
 172 }
 173
 174 /* ms_xline()
 175  *
 176  * handles a remote xline
 177  */
 178 static int
 179 ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 180 {
 181         /* parv[0]  parv[1]      parv[2]  parv[3]  parv[4]
 182          * oper     target serv  xline    type     reason
 183          */
 184         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 185
 186         if(!IsPerson(source_p))
 187                 return 0;
 188
 189         /* destined for me? */
 190         if(!match(parv[1], me.name))
 191                 return 0;
 192
 193         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 194         return 0;
 195 }
 196
 197 static int
 198 me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 199 {
 200         /* time name type :reason */
 201         if(!IsPerson(source_p))
 202                 return 0;
 203
 204         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 205         return 0;
 206 }
 207
 208 static void
 209 handle_remote_xline(struct Client *source_p, int temp_time,
 210                         const char *name, const char *reason)
 211 {
 212         struct ConfItem *aconf;
 213
 214         if(!find_shared_conf(source_p->username, source_p->host,
 215                                 source_p->servptr->name,
 216                                 (temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
 217                 return;
 218
 219         if(!valid_xline(source_p, name, reason, temp_time))
 220                 return;
 221
 222         /* already xlined */
 223         if((aconf = find_xline(name, 0)) != NULL)
 224         {
 225                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 226                                 me.name, source_p->name, name,
 227                                 aconf->name, aconf->passwd);
 228                 return;
 229         }
 230
 231         apply_xline(source_p, name, reason, temp_time);
 232 }
 233
 234 /* valid_xline()
 235  *
 236  * inputs       - client xlining, gecos, reason and whether to warn
 237  * outputs      -
 238  * side effects - checks the xline for validity, erroring if needed
 239  */
 240 static int
 241 valid_xline(struct Client *source_p, const char *gecos,
 242             const char *reason,  int temp_time)
 243 {
 244         if(EmptyString(reason))
 245         {
 246                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 247                            get_id(&me, source_p),
 248                            get_id(source_p, source_p), "XLINE");
 249                 return 0;
 250         }
 251
 252         if(strchr(reason, ':') != NULL)
 253         {
 254                 sendto_one_notice(source_p,
 255                                   ":Invalid character ':' in comment");
 256                 return 0;
 257         }
 258
 259         if(strchr(reason, '"'))
 260         {
 261                 sendto_one_notice(source_p,
 262                                 ":Invalid character '\"' in comment");
 263                 return 0;
 264         }
 265
 266         if(!valid_wild_card_simple(gecos))
 267         {
 268                 sendto_one_notice(source_p,
 269                                   ":Please include at least %d non-wildcard "
 270                                   "characters with the xline",
 271                                   ConfigFileEntry.min_nonwildcard_simple);
 272                 return 0;
 273         }
 274
 275         /* The following test checks for an xline which would break the
 276          * parser (which doesnt understand quoting).
 277          *
 278          * We dont lose much here, permanent versions of these would break
 279          * the parser on a reload anyway. --anfl
 280          */
 281         if(!temp_time && strstr(gecos, "\","))
 282         {
 283                 sendto_one_notice(source_p,
 284                                 ":Xlines containing \", must be temporary.");
 285                 return 0;
 286         }
 287
 288         return 1;
 289 }
 290
 291 void
 292 apply_xline(struct Client *source_p, const char *name, const char *reason,
 293                 int temp_time)
 294 {
 295         struct ConfItem *aconf;
 296
 297         aconf = make_conf();
 298         aconf->status = CONF_XLINE;
 299
 300         if(strstr(name, "\\s"))
 301         {
 302                 char *tmp = LOCAL_COPY(name);
 303                 char *orig = tmp;
 304                 char *new = tmp;
 305
 306                 while(*orig)
 307                 {
 308                         if(*orig == '\\' && *(orig + 1) != '\0')
 309                         {
 310                                 if(*(orig + 1) == 's')
 311                                 {
 312                                         *new++ = ' ';
 313                                         orig += 2;
 314                                 }
 315                                 /* otherwise skip that and the escaped
 316                                  * character after it, so we dont mistake
 317                                  * \\s as \s --fl
 318                                  */
 319                                 else
 320                                 {
 321                                         *new++ = *orig++;
 322                                         *new++ = *orig++;
 323                                 }
 324                         }
 325                         else
 326                                 *new++ = *orig++;
 327                 }
 328
 329                 *new = '\0';
 330                 DupString(aconf->name, tmp);
 331         }
 332         else
 333                 DupString(aconf->name, name);
 334
 335         DupString(aconf->passwd, reason);
 336         collapse(aconf->name);
 337
 338         if(temp_time > 0)
 339         {
 340                 aconf->hold = CurrentTime + temp_time;
 341
 342                 sendto_realops_flags(UMODE_ALL, L_ALL,
 343                              "%s added temporary %d min. X-Line for [%s] [%s]",
 344                              get_oper_name(source_p), temp_time / 60,
 345                              aconf->name, reason);
 346                 ilog(L_KLINE, "X %s %d %s %s",
 347                         get_oper_name(source_p), temp_time / 60,
 348                         name, reason);
 349                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 350                                 temp_time / 60, aconf->name);
 351         }
 352         else
 353         {
 354                 write_xline(source_p, aconf);
 355
 356                 sendto_realops_flags(UMODE_ALL, L_ALL, "%s added X-Line for [%s] [%s]",
 357                                 get_oper_name(source_p),
 358                                 aconf->name, aconf->passwd);
 359                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 360                                         aconf->name, aconf->passwd);
 361                 ilog(L_KLINE, "X %s 0 %s %s",
 362                         get_oper_name(source_p), name, reason);
 363         }
 364
 365         dlinkAddAlloc(aconf, &xline_conf_list);
 366         check_xlines();
 367 }
 368
 369 /* write_xline()
 370  *
 371  * inputs       - gecos, reason, xline type
 372  * outputs      - writes an xline to the config
 373  * side effects -
 374  */
 375 static void
 376 write_xline(struct Client *source_p, struct ConfItem *aconf)
 377 {
 378         char buffer[BUFSIZE * 2];
 379         FILE *out;
 380         const char *filename;
 381
 382         filename = ConfigFileEntry.xlinefile;
 383
 384         if((out = fopen(filename, "a")) == NULL)
 385         {
 386                 sendto_realops_flags(UMODE_ALL, L_ALL, "*** Problem opening %s ", filename);
 387                 free_conf(aconf);
 388                 return;
 389         }
 390
 391         ircsprintf(buffer, "\"%s\",\"0\",\"%s\",\"%s\",%ld\n",
 392                    aconf->name, aconf->passwd,
 393                    get_oper_name(source_p), CurrentTime);
 394
 395         if(fputs(buffer, out) == -1)
 396         {
 397                 sendto_realops_flags(UMODE_ALL, L_ALL, "*** Problem writing to %s", filename);
 398                 free_conf(aconf);
 399                 fclose(out);
 400                 return;
 401         }
 402
 403         fclose(out);
 404 }
 405
 406 static void
 407 propagate_xline(struct Client *source_p, const char *target,
 408                 int temp_time, const char *name, const char *type,
 409                 const char *reason)
 410 {
 411         if(!temp_time)
 412         {
 413                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 414                                         "XLINE %s %s %s :%s",
 415                                         target, name, type, reason);
 416                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 417                                 "ENCAP %s XLINE %d %s 2 :%s",
 418                                 target, temp_time, name, reason);
 419         }
 420         else
 421                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 422                                 "ENCAP %s XLINE %d %s %s :%s",
 423                                 target, temp_time, name, type, reason);
 424 }
 425
 426 static void
 427 cluster_xline(struct Client *source_p, int temp_time, const char *name,
 428                 const char *reason)
 429 {
 430         struct remote_conf *shared_p;
 431         dlink_node *ptr;
 432
 433         DLINK_FOREACH(ptr, cluster_conf_list.head)
 434         {
 435                 shared_p = ptr->data;
 436
 437                 /* old protocol cant handle temps, and we dont really want
 438                  * to convert them to perm.. --fl
 439                  */
 440                 if(!temp_time)
 441                 {
 442                         if(!(shared_p->flags & SHARED_PXLINE))
 443                                 continue;
 444
 445                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 446                                         "XLINE %s %s 2 :%s",
 447                                         shared_p->server, name, reason);
 448                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 449                                         "ENCAP %s XLINE 0 %s 2 :%s",
 450                                         shared_p->server, name, reason);
 451                 }
 452                 else if(shared_p->flags & SHARED_TXLINE)
 453                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 454                                         "ENCAP %s XLINE %d %s 2 :%s",
 455                                         shared_p->server, temp_time, name, reason);
 456         }
 457 }
 458
 459 /* mo_unxline()
 460  *
 461  * parv[1] - thing to unxline
 462  */
 463 static int
 464 mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 465 {
 466         if(!IsOperXline(source_p))
 467         {
 468                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 469                            me.name, source_p->name, "xline");
 470                 return 0;
 471         }
 472
 473         if(parc == 4 && !(irccmp(parv[2], "ON")))
 474         {
 475                 if(!IsOperRemoteBan(source_p))
 476                 {
 477                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 478                                 me.name, source_p->name, "remoteban");
 479                         return 0;
 480                 }
 481
 482                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER,
 483                                 "%s", parv[1]);
 484
 485                 if(match(parv[3], me.name) == 0)
 486                         return 0;
 487         }
 488         else if(dlink_list_length(&cluster_conf_list))
 489                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER,
 490                                 "%s", parv[1]);
 491
 492         if(remove_temp_xline(source_p, parv[1]))
 493                 return 0;
 494
 495         remove_xline(source_p, parv[1]);
 496
 497         return 0;
 498 }
 499
 500 /* ms_unxline()
 501  *
 502  * handles a remote unxline
 503  */
 504 static int
 505 ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 506 {
 507         /* parv[0]  parv[1]        parv[2]
 508          * oper     target server  gecos
 509          */
 510         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER,
 511                         "%s", parv[2]);
 512
 513         if(!match(parv[1], me.name))
 514                 return 0;
 515
 516         if(!IsPerson(source_p))
 517                 return 0;
 518
 519         handle_remote_unxline(source_p, parv[2]);
 520         return 0;
 521 }
 522
 523 static int
 524 me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 525 {
 526         /* name */
 527         if(!IsPerson(source_p))
 528                 return 0;
 529
 530         handle_remote_unxline(source_p, parv[1]);
 531         return 0;
 532 }
 533
 534 static void
 535 handle_remote_unxline(struct Client *source_p, const char *name)
 536 {
 537         if(!find_shared_conf(source_p->username, source_p->host,
 538                                 source_p->servptr->name, SHARED_UNXLINE))
 539                 return;
 540
 541         if(remove_temp_xline(source_p, name))
 542                 return;
 543
 544         remove_xline(source_p, name);
 545
 546         return;
 547 }
 548
 549 static int
 550 remove_temp_xline(struct Client *source_p, const char *name)
 551 {
 552         struct ConfItem *aconf;
 553         dlink_node *ptr;
 554
 555         DLINK_FOREACH(ptr, xline_conf_list.head)
 556         {
 557                 aconf = ptr->data;
 558
 559                 /* only want to check temp ones! */
 560                 if(!aconf->hold)
 561                         continue;
 562
 563                 if(!irccmp(aconf->name, name))
 564                 {
 565                         sendto_one_notice(source_p,
 566                                         ":X-Line for [%s] is removed",
 567                                         name);
 568                         sendto_realops_flags(UMODE_ALL, L_ALL,
 569                                          "%s has removed the temporary X-Line for: [%s]",
 570                                          get_oper_name(source_p), name);
 571                         ilog(L_KLINE, "UX %s %s",
 572                                 get_oper_name(source_p), name);
 573
 574                         free_conf(aconf);
 575                         dlinkDestroy(ptr, &xline_conf_list);
 576                         return 1;
 577                 }
 578         }
 579
 580         return 0;
 581 }
 582
 583 /* remove_xline()
 584  *
 585  * inputs       - gecos to remove
 586  * outputs      -
 587  * side effects - removes xline from conf, if exists
 588  */
 589 static void
 590 remove_xline(struct Client *source_p, const char *huntgecos)
 591 {
 592         FILE *in, *out;
 593         char buf[BUFSIZE];
 594         char buff[BUFSIZE];
 595         char temppath[BUFSIZE];
 596         const char *filename;
 597         const char *gecos;
 598         mode_t oldumask;
 599         char *p;
 600         int error_on_write = 0;
 601         int found_xline = 0;
 602
 603         filename = ConfigFileEntry.xlinefile;
 604         ircsnprintf(temppath, sizeof(temppath),
 605                  "%s.tmp", ConfigFileEntry.xlinefile);
 606
 607         if((in = fopen(filename, "r")) == NULL)
 608         {
 609                 sendto_one_notice(source_p, ":Cannot open %s", filename);
 610                 return;
 611         }
 612
 613         oldumask = umask(0);
 614
 615         if((out = fopen(temppath, "w")) == NULL)
 616         {
 617                 sendto_one_notice(source_p, ":Cannot open %s", temppath);
 618                 fclose(in);
 619                 umask(oldumask);
 620                 return;
 621         }
 622
 623         umask(oldumask);
 624
 625         while (fgets(buf, sizeof(buf), in))
 626         {
 627                 if(error_on_write)
 628                 {
 629                         if(temppath != NULL)
 630                                 (void) unlink(temppath);
 631
 632                         break;
 633                 }
 634
 635                 strlcpy(buff, buf, sizeof(buff));
 636
 637                 if((p = strchr(buff, '\n')) != NULL)
 638                         *p = '\0';
 639
 640                 if((*buff == '\0') || (*buff == '#'))
 641                 {
 642                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 643                         continue;
 644                 }
 645
 646                 if((gecos = getfield(buff)) == NULL)
 647                 {
 648                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 649                         continue;
 650                 }
 651
 652                 /* matching.. */
 653                 if(irccmp(gecos, huntgecos) == 0)
 654                         found_xline++;
 655                 else
 656                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 657         }
 658
 659         fclose(in);
 660         fclose(out);
 661
 662         if(error_on_write)
 663         {
 664                 sendto_one_notice(source_p,
 665                                   ":Couldn't write temp xline file, aborted");
 666                 return;
 667         }
 668         else if(found_xline == 0)
 669         {
 670                 sendto_one_notice(source_p, ":No X-Line for %s", huntgecos);
 671
 672                 if(temppath != NULL)
 673                         (void) unlink(temppath);
 674                 return;
 675         }
 676
 677         (void) rename(temppath, filename);
 678         rehash_bans(0);
 679
 680         sendto_one_notice(source_p, ":X-Line for [%s] is removed", huntgecos);
 681         sendto_realops_flags(UMODE_ALL, L_ALL,
 682                              "%s has removed the X-Line for: [%s]",
 683                              get_oper_name(source_p), huntgecos);
 684         ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), huntgecos);
 685 }