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 3161 2007-01-25 07:23:01Z nenolod $
  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
  54 static int mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  55 static int ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  56 static int me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  57 static int mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  58 static int ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  59 static int me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  60
  61 struct Message xline_msgtab = {
  62         "XLINE", 0, 0, 0, MFLG_SLOW,
  63         {mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
  64 };
  65 struct Message unxline_msgtab = {
  66         "UNXLINE", 0, 0, 0, MFLG_SLOW,
  67         {mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
  68 };
  69
  70 mapi_clist_av1 xline_clist[] =  { &xline_msgtab, &unxline_msgtab, NULL };
  71 DECLARE_MODULE_AV1(xline, NULL, NULL, xline_clist, NULL, NULL, "$Revision: 3161 $");
  72
  73 static int valid_xline(struct Client *, const char *, const char *);
  74 static void apply_xline(struct Client *client_p, const char *name,
  75                         const char *reason, int temp_time);
  76 static void write_xline(struct Client *source_p, struct ConfItem *aconf);
  77 static void propagate_xline(struct Client *source_p, const char *target,
  78                         int temp_time, const char *name,
  79                         const char *type, const char *reason);
  80 static void cluster_xline(struct Client *source_p, int temp_time,
  81                         const char *name, const char *reason);
  82
  83 static void handle_remote_xline(struct Client *source_p, int temp_time,
  84                                 const char *name, const char *reason);
  85 static void handle_remote_unxline(struct Client *source_p, const char *name);
  86
  87 static void remove_xline(struct Client *source_p, const char *name);
  88 static int remove_xline_from_file(struct Client *source_p, const char *gecos);
  89
  90
  91 /* m_xline()
  92  *
  93  * parv[1] - thing to xline
  94  * parv[2] - optional type/reason
  95  * parv[3] - reason
  96  */
  97 static int
  98 mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  99 {
 100         struct ConfItem *aconf;
 101         const char *name;
 102         const char *reason;
 103         const char *target_server = NULL;
 104         int temp_time;
 105         int loc = 1;
 106
 107         if(!IsOperXline(source_p))
 108         {
 109                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 110                            me.name, source_p->name, "xline");
 111                 return 0;
 112         }
 113
 114         if((temp_time = valid_temp_time(parv[loc])) >= 0)
 115                 loc++;
 116         /* we just set temp_time to -1! */
 117         else
 118                 temp_time = 0;
 119
 120         name = parv[loc];
 121         loc++;
 122
 123         /* XLINE <gecos> ON <server> :<reason> */
 124         if(parc >= loc+2 && !irccmp(parv[loc], "ON"))
 125         {
 126                 if(!IsOperRemoteBan(source_p))
 127                 {
 128                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 129                                 me.name, source_p->name, "remoteban");
 130                         return 0;
 131                 }
 132
 133                 target_server = parv[loc+1];
 134                 loc += 2;
 135         }
 136
 137         if(parc <= loc || EmptyString(parv[loc]))
 138         {
 139                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 140                                 me.name, source_p->name, "XLINE");
 141                 return 0;
 142         }
 143
 144         reason = parv[loc];
 145
 146         if(target_server != NULL)
 147         {
 148                 propagate_xline(source_p, target_server, temp_time,
 149                                 name, "2", reason);
 150
 151                 if(!match(target_server, me.name))
 152                         return 0;
 153         }
 154         else if(rb_dlink_list_length(&cluster_conf_list) > 0)
 155                 cluster_xline(source_p, temp_time, name, reason);
 156
 157         if((aconf = find_xline_mask(name)) != NULL)
 158         {
 159                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 160                            me.name, source_p->name, name, aconf->name, aconf->passwd);
 161                 return 0;
 162         }
 163
 164         if(!valid_xline(source_p, name, reason))
 165                 return 0;
 166
 167         apply_xline(source_p, name, reason, temp_time);
 168
 169         return 0;
 170 }
 171
 172 /* ms_xline()
 173  *
 174  * handles a remote xline
 175  */
 176 static int
 177 ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 178 {
 179         /* source_p  parv[1]      parv[2]  parv[3]  parv[4]
 180          * oper      target serv  xline    type     reason
 181          */
 182         propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
 183
 184         if(!IsPerson(source_p))
 185                 return 0;
 186
 187         /* destined for me? */
 188         if(!match(parv[1], me.name))
 189                 return 0;
 190
 191         handle_remote_xline(source_p, 0, parv[2], parv[4]);
 192         return 0;
 193 }
 194
 195 static int
 196 me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 197 {
 198         /* time name type :reason */
 199         if(!IsPerson(source_p))
 200                 return 0;
 201
 202         handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
 203         return 0;
 204 }
 205
 206 static void
 207 handle_remote_xline(struct Client *source_p, int temp_time,
 208                         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, aconf->passwd);
 224                 return;
 225         }
 226
 227         apply_xline(source_p, name, reason, temp_time);
 228 }
 229
 230 /* valid_xline()
 231  *
 232  * inputs       - client xlining, gecos, reason and whether to warn
 233  * outputs      -
 234  * side effects - checks the xline for validity, erroring if needed
 235  */
 236 static int
 237 valid_xline(struct Client *source_p, const char *gecos,
 238             const char *reason)
 239 {
 240         if(EmptyString(reason))
 241         {
 242                 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
 243                            get_id(&me, source_p),
 244                            get_id(source_p, source_p), "XLINE");
 245                 return 0;
 246         }
 247
 248         if(strchr(reason, ':') != NULL)
 249         {
 250                 sendto_one_notice(source_p,
 251                                   ":Invalid character ':' in comment");
 252                 return 0;
 253         }
 254
 255         if(strchr(reason, '"'))
 256         {
 257                 sendto_one_notice(source_p,
 258                                 ":Invalid character '\"' in comment");
 259                 return 0;
 260         }
 261
 262         if(!valid_wild_card_simple(gecos))
 263         {
 264                 sendto_one_notice(source_p,
 265                                   ":Please include at least %d non-wildcard "
 266                                   "characters with the xline",
 267                                   ConfigFileEntry.min_nonwildcard_simple);
 268                 return 0;
 269         }
 270
 271         return 1;
 272 }
 273
 274 void
 275 apply_xline(struct Client *source_p, const char *name, const char *reason,
 276                 int temp_time)
 277 {
 278         struct ConfItem *aconf;
 279
 280         aconf = make_conf();
 281         aconf->status = CONF_XLINE;
 282
 283         aconf->name = rb_strdup(name);
 284         aconf->passwd = rb_strdup(reason);
 285         collapse(aconf->name);
 286
 287         if(temp_time > 0)
 288         {
 289                 aconf->hold = rb_current_time() + temp_time;
 290
 291                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 292                              "%s added temporary %d min. X-Line for [%s] [%s]",
 293                              get_oper_name(source_p), temp_time / 60,
 294                              aconf->name, reason);
 295                 ilog(L_KLINE, "X %s %d %s %s",
 296                         get_oper_name(source_p), temp_time / 60,
 297                         name, reason);
 298                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 299                                 temp_time / 60, aconf->name);
 300         }
 301         else
 302         {
 303                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 304                                 get_oper_name(source_p),
 305                                 aconf->name, aconf->passwd);
 306                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 307                                         aconf->name, aconf->passwd);
 308                 write_xline(source_p, aconf);
 309                 ilog(L_KLINE, "X %s 0 %s %s",
 310                         get_oper_name(source_p), name, reason);
 311         }
 312
 313         rb_dlinkAddAlloc(aconf, &xline_conf_list);
 314         check_xlines();
 315 }
 316
 317 /* write_xline()
 318  *
 319  * inputs       - gecos, reason, xline type
 320  * outputs      - writes an xline to the config
 321  * side effects -
 322  */
 323 static void
 324 write_xline(struct Client *source_p, struct ConfItem *aconf)
 325 {
 326         char buffer[BUFSIZE * 2];
 327         FILE *out;
 328         const char *filename;
 329
 330         filename = ConfigFileEntry.xlinefile;
 331
 332         if((out = fopen(filename, "a")) == NULL)
 333         {
 334                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "*** Problem opening %s ", filename);
 335                 sendto_one_notice(source_p, ":*** Problem opening file, xline added temporarily only");
 336                 return;
 337         }
 338
 339         rb_sprintf(buffer, "\"%s\",\"0\",\"%s\",\"%s\",%ld\n",
 340                    aconf->name, aconf->passwd,
 341                    get_oper_name(source_p), (long) rb_current_time());
 342
 343         if(fputs(buffer, out) == -1)
 344         {
 345                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "*** Problem writing to %s", filename);
 346                 sendto_one_notice(source_p, ":*** Problem writing to file, xline added temporarily only");
 347                 fclose(out);
 348                 return;
 349         }
 350
 351         if(fclose(out))
 352         {
 353                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "*** Problem writing to %s", filename);
 354                 sendto_one_notice(source_p, ":*** Problem writing to file, xline added temporarily only");
 355                 return;
 356         }
 357 }
 358
 359 static void
 360 propagate_xline(struct Client *source_p, const char *target,
 361                 int temp_time, const char *name, const char *type,
 362                 const char *reason)
 363 {
 364         if(!temp_time)
 365         {
 366                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 367                                         "XLINE %s %s %s :%s",
 368                                         target, name, type, reason);
 369                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 370                                 "ENCAP %s XLINE %d %s 2 :%s",
 371                                 target, temp_time, name, reason);
 372         }
 373         else
 374                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 375                                 "ENCAP %s XLINE %d %s %s :%s",
 376                                 target, temp_time, name, type, reason);
 377 }
 378
 379 static void
 380 cluster_xline(struct Client *source_p, int temp_time, const char *name,
 381                 const char *reason)
 382 {
 383         struct remote_conf *shared_p;
 384         rb_dlink_node *ptr;
 385
 386         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 387         {
 388                 shared_p = ptr->data;
 389
 390                 /* old protocol cant handle temps, and we dont really want
 391                  * to convert them to perm.. --fl
 392                  */
 393                 if(!temp_time)
 394                 {
 395                         if(!(shared_p->flags & SHARED_PXLINE))
 396                                 continue;
 397
 398                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 399                                         "XLINE %s %s 2 :%s",
 400                                         shared_p->server, name, reason);
 401                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 402                                         "ENCAP %s XLINE 0 %s 2 :%s",
 403                                         shared_p->server, name, reason);
 404                 }
 405                 else if(shared_p->flags & SHARED_TXLINE)
 406                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 407                                         "ENCAP %s XLINE %d %s 2 :%s",
 408                                         shared_p->server, temp_time, name, reason);
 409         }
 410 }
 411
 412 /* mo_unxline()
 413  *
 414  * parv[1] - thing to unxline
 415  */
 416 static int
 417 mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 418 {
 419         if(!IsOperXline(source_p))
 420         {
 421                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 422                            me.name, source_p->name, "xline");
 423                 return 0;
 424         }
 425
 426         if(parc == 4 && !(irccmp(parv[2], "ON")))
 427         {
 428                 if(!IsOperRemoteBan(source_p))
 429                 {
 430                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 431                                 me.name, source_p->name, "remoteban");
 432                         return 0;
 433                 }
 434
 435                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER,
 436                                 "%s", parv[1]);
 437
 438                 if(match(parv[3], me.name) == 0)
 439                         return 0;
 440         }
 441         else if(rb_dlink_list_length(&cluster_conf_list))
 442                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER,
 443                                 "%s", parv[1]);
 444
 445         remove_xline(source_p, parv[1]);
 446
 447         return 0;
 448 }
 449
 450 /* ms_unxline()
 451  *
 452  * handles a remote unxline
 453  */
 454 static int
 455 ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 456 {
 457         /* source_p  parv[1]        parv[2]
 458          * oper      target server  gecos
 459          */
 460         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER,
 461                         "%s", parv[2]);
 462
 463         if(!match(parv[1], me.name))
 464                 return 0;
 465
 466         if(!IsPerson(source_p))
 467                 return 0;
 468
 469         handle_remote_unxline(source_p, parv[2]);
 470         return 0;
 471 }
 472
 473 static int
 474 me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 475 {
 476         /* name */
 477         if(!IsPerson(source_p))
 478                 return 0;
 479
 480         handle_remote_unxline(source_p, parv[1]);
 481         return 0;
 482 }
 483
 484 static void
 485 handle_remote_unxline(struct Client *source_p, const char *name)
 486 {
 487         if(!find_shared_conf(source_p->username, source_p->host,
 488                                 source_p->servptr->name, SHARED_UNXLINE))
 489                 return;
 490
 491         remove_xline(source_p, name);
 492
 493         return;
 494 }
 495
 496 static void
 497 remove_xline(struct Client *source_p, const char *name)
 498 {
 499         struct ConfItem *aconf;
 500         rb_dlink_node *ptr;
 501         char *encoded;
 502
 503         encoded = xline_encode_spaces(name);
 504
 505         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 506         {
 507                 aconf = ptr->data;
 508
 509                 if(!irccmp(aconf->name, encoded))
 510                 {
 511                         if (!aconf->hold)
 512                         {
 513                                 if (!remove_xline_from_file(source_p, encoded))
 514                                         return;
 515                         }
 516                         else
 517                         {
 518                                 sendto_one_notice(source_p,
 519                                                 ":X-Line for [%s] is removed",
 520                                                 encoded);
 521                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 522                                                 "%s has removed the temporary X-Line for: [%s]",
 523                                                 get_oper_name(source_p), encoded);
 524                                 ilog(L_KLINE, "UX %s %s",
 525                                                 get_oper_name(source_p), encoded);
 526                         }
 527
 528                         remove_reject_mask(aconf->name, NULL);
 529                         free_conf(aconf);
 530                         rb_dlinkDestroy(ptr, &xline_conf_list);
 531                         rb_free(encoded);
 532                         return;
 533                 }
 534         }
 535
 536         sendto_one_notice(source_p, ":No X-Line for %s", encoded);
 537         rb_free(encoded);
 538
 539         return;
 540 }
 541
 542 /* remove_xline_from_file()
 543  *
 544  * inputs       - gecos to remove
 545  * outputs      -
 546  * side effects - removes xline from conf, if exists
 547  *              - does not touch xline_conf_list
 548  */
 549 static int
 550 remove_xline_from_file(struct Client *source_p, const char *huntgecos)
 551 {
 552         FILE *in, *out;
 553         char buf[BUFSIZE];
 554         char buff[BUFSIZE];
 555         char temppath[BUFSIZE];
 556         const char *filename;
 557         const char *gecos;
 558         mode_t oldumask;
 559         char *p;
 560         char *encoded;
 561         int error_on_write = 0;
 562         int found_xline = 0;
 563
 564         filename = ConfigFileEntry.xlinefile;
 565         rb_snprintf(temppath, sizeof(temppath),
 566                  "%s.tmp", ConfigFileEntry.xlinefile);
 567
 568         if((in = fopen(filename, "r")) == NULL)
 569         {
 570                 sendto_one_notice(source_p, ":Cannot open %s", filename);
 571                 return 0;
 572         }
 573
 574         oldumask = umask(0);
 575
 576         if((out = fopen(temppath, "w")) == NULL)
 577         {
 578                 sendto_one_notice(source_p, ":Cannot open %s", temppath);
 579                 fclose(in);
 580                 umask(oldumask);
 581                 return 0;
 582         }
 583
 584         umask(oldumask);
 585
 586         while (fgets(buf, sizeof(buf), in))
 587         {
 588                 if(error_on_write)
 589                 {
 590                         if(temppath != NULL)
 591                                 (void) unlink(temppath);
 592
 593                         break;
 594                 }
 595
 596                 rb_strlcpy(buff, buf, sizeof(buff));
 597
 598                 if((p = strchr(buff, '\n')) != NULL)
 599                         *p = '\0';
 600
 601                 if((*buff == '\0') || (*buff == '#'))
 602                 {
 603                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 604                         continue;
 605                 }
 606
 607                 if((gecos = getfield(buff)) == NULL)
 608                 {
 609                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 610                         continue;
 611                 }
 612
 613                 /* matching.. */
 614                 encoded = xline_encode_spaces(gecos);
 615                 if(irccmp(encoded, huntgecos) == 0)
 616                         found_xline++;
 617                 else
 618                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 619                 rb_free(encoded);
 620         }
 621
 622         fclose(in);
 623         if (fclose(out))
 624                 error_on_write = YES;
 625
 626         if(error_on_write)
 627         {
 628                 sendto_one_notice(source_p,
 629                                   ":Couldn't write temp xline file, aborted");
 630                 return 0;
 631         }
 632         else if(found_xline == 0)
 633         {
 634                 sendto_one_notice(source_p, ":Cannot find X-Line for %s in file", huntgecos);
 635
 636                 if(temppath != NULL)
 637                         (void) unlink(temppath);
 638                 return 0;
 639         }
 640
 641         if (rename(temppath, filename))
 642         {
 643                 sendto_one_notice(source_p, ":Couldn't rename temp file, aborted");
 644                 return 0;
 645         }
 646
 647         sendto_one_notice(source_p, ":X-Line for [%s] is removed", huntgecos);
 648         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 649                              "%s has removed the X-Line for: [%s]",
 650                              get_oper_name(source_p), huntgecos);
 651         ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), huntgecos);
 652
 653         return 1;
 654 }