modules/m_xline.c

   1 /* modules/m_xline.c
   2  *
   3  *  Copyright (C) 2002-2003 Lee Hardy <lee@leeh.co.uk>
   4  *  Copyright (C) 2002-2005 ircd-ratbox development team
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  * 1.Redistributions of source code must retain the above copyright notice,
  11  *   this list of conditions and the following disclaimer.
  12  * 2.Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in the
  14  *   documentation and/or other materials provided with the distribution.
  15  * 3.The name of the author may not be used to endorse or promote products
  16  *   derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "stdinc.h"
  32 #include "tools.h"
  33 #include "send.h"
  34 #include "channel.h"
  35 #include "client.h"
  36 #include "common.h"
  37 #include "config.h"
  38 #include "class.h"
  39 #include "ircd.h"
  40 #include "numeric.h"
  41 #include "memory.h"
  42 #include "s_log.h"
  43 #include "s_serv.h"
  44 #include "whowas.h"
  45 #include "irc_string.h"
  46 #include "sprintf_irc.h"
  47 #include "hash.h"
  48 #include "msg.h"
  49 #include "parse.h"
  50 #include "modules.h"
  51 #include "s_conf.h"
  52 #include "s_newconf.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: 125 $");
  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 int remove_temp_xline(struct Client *source_p, const char *name);
  88 static void remove_xline(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), me.name, source_p->name,
 129                                         "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(dlink_list_length(&cluster_conf_list) > 0)
 155                 cluster_xline(source_p, temp_time, name, reason);
 156
 157         if((aconf = find_xline(name, 0)) != NULL)
 158         {
 159                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 160                            me.name, source_p->name, parv[1], 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         /* parv[0]  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
 213         if (!find_client_shared_conf(source_p, temp_time > 0 ? SHARED_TXLINE : SHARED_PXLINE))
 214                 return;
 215         if(!valid_xline(source_p, name, reason))
 216                 return;
 217
 218         /* already xlined */
 219         if((aconf = find_xline(name, 0)) != NULL)
 220         {
 221                 sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
 222                                 me.name, source_p->name, name,
 223                                 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         if(strstr(name, "\\s"))
 284         {
 285                 char *tmp = LOCAL_COPY(name);
 286                 char *orig = tmp;
 287                 char *new = tmp;
 288
 289                 while(*orig)
 290                 {
 291                         if(*orig == '\\')
 292                         {
 293                                 if(*(orig + 1) == 's')
 294                                 {
 295                                         *new++ = ' ';
 296                                         orig += 2;
 297                                 }
 298                                 /* otherwise skip that and the escaped
 299                                  * character after it, so we dont mistake
 300                                  * \\s as \s --fl
 301                                  */
 302                                 else
 303                                 {
 304                                         *new++ = *orig++;
 305                                         *new++ = *orig++;
 306                                 }
 307                         }
 308                         else
 309                                 *new++ = *orig++;
 310                 }
 311
 312                 *new = '\0';
 313                 DupString(aconf->name, tmp);
 314         }
 315         else
 316                 DupString(aconf->name, name);
 317
 318         DupString(aconf->passwd, reason);
 319         collapse(aconf->name);
 320
 321         if(temp_time > 0)
 322         {
 323                 aconf->hold = CurrentTime + temp_time;
 324
 325                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 326                              "%s added temporary %d min. X-Line for [%s] [%s]",
 327                              get_oper_name(source_p), temp_time / 60,
 328                              aconf->name, reason);
 329                 ilog(L_KLINE, "X %s %d %s %s",
 330                         get_oper_name(source_p), temp_time / 60,
 331                         name, reason);
 332                 sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
 333                                 temp_time / 60, aconf->name);
 334         }
 335         else
 336         {
 337                 write_xline(source_p, aconf);
 338
 339                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
 340                                 get_oper_name(source_p),
 341                                 aconf->name, aconf->passwd);
 342                 sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
 343                                         aconf->name, aconf->passwd);
 344                 ilog(L_KLINE, "X %s 0 %s %s",
 345                         get_oper_name(source_p), name, reason);
 346         }
 347
 348         dlinkAddAlloc(aconf, &xline_conf_list);
 349         check_xlines();
 350 }
 351
 352 /* write_xline()
 353  *
 354  * inputs       - gecos, reason, xline type
 355  * outputs      - writes an xline to the config
 356  * side effects -
 357  */
 358 static void
 359 write_xline(struct Client *source_p, struct ConfItem *aconf)
 360 {
 361         char buffer[BUFSIZE * 2];
 362         FILE *out;
 363         const char *filename;
 364
 365         filename = ConfigFileEntry.xlinefile;
 366
 367         if((out = fopen(filename, "a")) == NULL)
 368         {
 369                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "*** Problem opening %s ", filename);
 370                 free_conf(aconf);
 371                 return;
 372         }
 373
 374         ircsprintf(buffer, "\"%s\",\"0\",\"%s\",\"%s\",%ld\n",
 375                    aconf->name, aconf->passwd,
 376                    get_oper_name(source_p), CurrentTime);
 377
 378         if(fputs(buffer, out) == -1)
 379         {
 380                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "*** Problem writing to %s", filename);
 381                 free_conf(aconf);
 382                 fclose(out);
 383                 return;
 384         }
 385
 386         fclose(out);
 387 }
 388
 389 static void
 390 propagate_xline(struct Client *source_p, const char *target,
 391                 int temp_time, const char *name, const char *type,
 392                 const char *reason)
 393 {
 394         if(!temp_time)
 395         {
 396                 sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
 397                                         "XLINE %s %s %s :%s",
 398                                         target, name, type, reason);
 399                 sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
 400                                 "ENCAP %s XLINE %d %s 2 :%s",
 401                                 target, temp_time, name, reason);
 402         }
 403         else
 404                 sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
 405                                 "ENCAP %s XLINE %d %s %s :%s",
 406                                 target, temp_time, name, type, reason);
 407 }
 408
 409 static void
 410 cluster_xline(struct Client *source_p, int temp_time, const char *name,
 411                 const char *reason)
 412 {
 413         struct remote_conf *shared_p;
 414         dlink_node *ptr;
 415
 416         DLINK_FOREACH(ptr, cluster_conf_list.head)
 417         {
 418                 shared_p = ptr->data;
 419
 420                 /* old protocol cant handle temps, and we dont really want
 421                  * to convert them to perm.. --fl
 422                  */
 423                 if(!temp_time)
 424                 {
 425                         if(!(shared_p->flags & SHARED_PXLINE))
 426                                 continue;
 427
 428                         sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
 429                                         "XLINE %s %s 2 :%s",
 430                                         shared_p->server, name, reason);
 431                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
 432                                         "ENCAP %s XLINE 0 %s 2 :%s",
 433                                         shared_p->server, name, reason);
 434                 }
 435                 else if(shared_p->flags & SHARED_TXLINE)
 436                         sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
 437                                         "ENCAP %s XLINE %d %s 2 :%s",
 438                                         shared_p->server, temp_time, name, reason);
 439         }
 440 }
 441
 442 /* mo_unxline()
 443  *
 444  * parv[1] - thing to unxline
 445  */
 446 static int
 447 mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 448 {
 449         if(!IsOperXline(source_p))
 450         {
 451                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 452                            me.name, source_p->name, "xline");
 453                 return 0;
 454         }
 455
 456         if(parc == 4 && !(irccmp(parv[2], "ON")))
 457         {
 458                 if(!IsOperRemoteBan(source_p))
 459                 {
 460                         sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name,
 461                                         "remoteban");
 462                         return 0;
 463                 }
 464
 465                 propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER,
 466                                 "%s", parv[1]);
 467
 468                 if(match(parv[3], me.name) == 0)
 469                         return 0;
 470         }
 471         else if(dlink_list_length(&cluster_conf_list))
 472                 cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER,
 473                                 "%s", parv[1]);
 474
 475         if(remove_temp_xline(source_p, parv[1]))
 476                 return 0;
 477
 478         remove_xline(source_p, parv[1]);
 479
 480         return 0;
 481 }
 482
 483 /* ms_unxline()
 484  *
 485  * handles a remote unxline
 486  */
 487 static int
 488 ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 489 {
 490         /* parv[0]  parv[1]        parv[2]
 491          * oper     target server  gecos
 492          */
 493         propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER,
 494                         "%s", parv[2]);
 495
 496         if(!match(parv[1], me.name))
 497                 return 0;
 498
 499         if(!IsPerson(source_p))
 500                 return 0;
 501
 502         handle_remote_unxline(source_p, parv[2]);
 503         return 0;
 504 }
 505
 506 static int
 507 me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 508 {
 509         /* name */
 510         if(!IsPerson(source_p))
 511                 return 0;
 512
 513         handle_remote_unxline(source_p, parv[1]);
 514         return 0;
 515 }
 516
 517 static void
 518 handle_remote_unxline(struct Client *source_p, const char *name)
 519 {
 520         if (!find_client_shared_conf(source_p, SHARED_UNXLINE))
 521                 return;
 522         if(remove_temp_xline(source_p, name))
 523                 return;
 524
 525         remove_xline(source_p, name);
 526
 527         return;
 528 }
 529
 530 static int
 531 remove_temp_xline(struct Client *source_p, const char *name)
 532 {
 533         struct ConfItem *aconf;
 534         dlink_node *ptr;
 535
 536         DLINK_FOREACH(ptr, xline_conf_list.head)
 537         {
 538                 aconf = ptr->data;
 539
 540                 /* only want to check temp ones! */
 541                 if(!aconf->hold)
 542                         continue;
 543
 544                 if(!irccmp(aconf->name, name))
 545                 {
 546                         sendto_one_notice(source_p,
 547                                         ":X-Line for [%s] is removed",
 548                                         name);
 549                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 550                                          "%s has removed the temporary X-Line for: [%s]",
 551                                          get_oper_name(source_p), name);
 552                         ilog(L_KLINE, "UX %s %s",
 553                                 get_oper_name(source_p), name);
 554
 555                         free_conf(aconf);
 556                         dlinkDestroy(ptr, &xline_conf_list);
 557                         return 1;
 558                 }
 559         }
 560
 561         return 0;
 562 }
 563
 564 /* remove_xline()
 565  *
 566  * inputs       - gecos to remove
 567  * outputs      -
 568  * side effects - removes xline from conf, if exists
 569  */
 570 static void
 571 remove_xline(struct Client *source_p, const char *huntgecos)
 572 {
 573         FILE *in, *out;
 574         char buf[BUFSIZE];
 575         char buff[BUFSIZE];
 576         char temppath[BUFSIZE];
 577         const char *filename;
 578         const char *gecos;
 579         mode_t oldumask;
 580         char *p;
 581         int error_on_write = 0;
 582         int found_xline = 0;
 583
 584         filename = ConfigFileEntry.xlinefile;
 585         ircsnprintf(temppath, sizeof(temppath),
 586                  "%s.tmp", ConfigFileEntry.xlinefile);
 587
 588         if((in = fopen(filename, "r")) == NULL)
 589         {
 590                 sendto_one_notice(source_p, ":Cannot open %s", filename);
 591                 return;
 592         }
 593
 594         oldumask = umask(0);
 595
 596         if((out = fopen(temppath, "w")) == NULL)
 597         {
 598                 sendto_one_notice(source_p, ":Cannot open %s", temppath);
 599                 fclose(in);
 600                 umask(oldumask);
 601                 return;
 602         }
 603
 604         umask(oldumask);
 605
 606         while (fgets(buf, sizeof(buf), in))
 607         {
 608                 if(error_on_write)
 609                 {
 610                         if(temppath != NULL)
 611                                 (void) unlink(temppath);
 612
 613                         break;
 614                 }
 615
 616                 strlcpy(buff, buf, sizeof(buff));
 617
 618                 if((p = strchr(buff, '\n')) != NULL)
 619                         *p = '\0';
 620
 621                 if((*buff == '\0') || (*buff == '#'))
 622                 {
 623                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 624                         continue;
 625                 }
 626
 627                 if((gecos = getfield(buff)) == NULL)
 628                 {
 629                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 630                         continue;
 631                 }
 632
 633                 /* matching.. */
 634                 if(irccmp(gecos, huntgecos) == 0)
 635                         found_xline++;
 636                 else
 637                         error_on_write = (fputs(buf, out) < 0) ? YES : NO;
 638         }
 639
 640         fclose(in);
 641         fclose(out);
 642
 643         if(error_on_write)
 644         {
 645                 sendto_one_notice(source_p,
 646                                   ":Couldn't write temp xline file, aborted");
 647                 return;
 648         }
 649         else if(found_xline == 0)
 650         {
 651                 sendto_one_notice(source_p, ":No X-Line for %s", huntgecos);
 652
 653                 if(temppath != NULL)
 654                         (void) unlink(temppath);
 655                 return;
 656         }
 657
 658         (void) rename(temppath, filename);
 659         rehash_bans(0);
 660
 661         sendto_one_notice(source_p, ":X-Line for [%s] is removed", huntgecos);
 662         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 663                              "%s has removed the X-Line for: [%s]",
 664                              get_oper_name(source_p), huntgecos);
 665         ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), huntgecos);
 666 }