trusts/trusts_policy.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <stdarg.h>
   4 #include <unistd.h>
   5 #include <sys/types.h>
   6 #include <sys/socket.h>
   7 #include <netinet/in.h>
   8
   9 #ifndef __USE_MISC
  10 #define __USE_MISC /* inet_aton */
  11 #endif
  12
  13 #include <arpa/inet.h>
  14 #include <sys/un.h>
  15 #include <sys/poll.h>
  16 #include <errno.h>
  17 #include <fcntl.h>
  18
  19 #include "../lib/version.h"
  20 #include "../lib/hmac.h"
  21 #include "../core/events.h"
  22 #include "../core/schedule.h"
  23 #include "../core/nsmalloc.h"
  24 #include "../core/hooks.h"
  25 #include "../core/config.h"
  26 #include "../control/control.h"
  27 #include "../lib/irc_string.h"
  28 #include "../irc/irc.h"
  29 #include "../glines/glines.h"
  30 #include "../patricianick/patricianick.h"
  31 #include "trusts.h"
  32
  33 MODULE_VERSION("");
  34
  35 static int countext, enforcepolicy_irc, enforcepolicy_auth;
  36
  37 #define TRUSTBUFSIZE 8192
  38 #define TRUSTPASSLEN 128
  39 #define NONCELEN 16
  40
  41 typedef struct trustsocket {
  42   int fd;
  43   int authed;
  44   char authuser[SERVERLEN+1];
  45   char buf[TRUSTBUFSIZE];
  46   unsigned char nonce[NONCELEN];
  47   int size;
  48   time_t connected;
  49   time_t timeout;
  50   int accepted;
  51   int rejected;
  52   int unthrottled;
  53
  54   struct trustsocket *next;
  55 } trustsocket;
  56
  57 static trustsocket *tslist;
  58 static int listenerfd = -1;
  59 static FILE *urandom;
  60
  61 typedef struct trustaccount {
  62   int used;
  63   char server[SERVERLEN+1];
  64   char password[TRUSTPASSLEN+1];
  65 } trustaccount;
  66
  67 trustaccount trustaccounts[MAXSERVERS];
  68
  69 static int checkconnection(const char *username, struct irc_in_addr *ipaddress, int hooknum, int usercountadjustment, char *message, size_t messagelen, int *unthrottle) {
  70   trusthost *th;
  71   trustgroup *tg;
  72   struct irc_in_addr ipaddress_canonical;
  73
  74   ip_canonicalize_tunnel(&ipaddress_canonical, ipaddress);
  75
  76   th = th_getbyhost(&ipaddress_canonical);
  77
  78   if (unthrottle)
  79     *unthrottle = 0;
  80
  81   if(messagelen>0)
  82     message[0] = '\0';
  83
  84   if(!th || !trustsdbloaded || irc_in_addr_is_loopback(ipaddress))
  85     return POLICY_SUCCESS;
  86
  87   tg = th->group;
  88
  89   /*
  90    * the purpose of this logic is to avoid spam like this:
  91    * WARNING: tgX exceeded limit: 11 connected vs 10 max
  92    * (goes back down to 10)
  93    * WARNING: tgX exceeded limit: 11 connected vs 10 max
  94    */
  95
  96   if(hooknum == HOOK_TRUSTS_NEWNICK) {
  97     patricia_node_t *head, *node;
  98     int i, nodecount = 0;
  99     patricianick_t *pnp;
 100     nick *npp;
 101
 102     head = refnode(iptree, &ipaddress_canonical, th->nodebits);
 103     nodecount = head->usercount;
 104
 105     /* Account for borrowed IP addresses. */
 106     PATRICIA_WALK(head, node) {
 107       pnp = node->exts[pnode_ext];
 108
 109       if (pnp)
 110         for (i = 0; i < PATRICIANICK_HASHSIZE; i++)
 111           for (npp = pnp->identhash[i]; npp; npp=npp->exts[pnick_ext])
 112             if (NickOnServiceServer(npp))
 113               usercountadjustment--;
 114     }
 115     PATRICIA_WALK_END;
 116
 117     derefnode(iptree, head);
 118
 119     if(th->maxpernode && nodecount + usercountadjustment > th->maxpernode) {
 120       controlwall(NO_OPER, NL_CLONING, "Hard connection limit exceeded on subnet: %s (group: %s): %d connected, %d max.", CIDRtostr(*ipaddress, th->nodebits), tg->name->content, nodecount + usercountadjustment, th->maxpernode);
 121       snprintf(message, messagelen, "Too many connections from your host (%s) - see https://www.quakenet.org/help/trusts/connection-limit for details.", IPtostr(*ipaddress));
 122       return POLICY_FAILURE_NODECOUNT;
 123     }
 124
 125     if(tg->trustedfor && tg->count + usercountadjustment > tg->trustedfor) {
 126       if(tg->count > (long)tg->exts[countext]) {
 127         tg->exts[countext] = (void *)(long)tg->count;
 128
 129         controlwall(NO_OPER, NL_CLONING, "Hard connection limit exceeded (group %s): %d connected, %d max.", tg->name->content, tg->count + usercountadjustment, tg->trustedfor);
 130         snprintf(message, messagelen, "Too many connections from your trust (%s) - see https://www.quakenet.org/help/trusts/connection-limit for details.", IPtostr(*ipaddress));
 131       }
 132
 133       snprintf(message, messagelen, "Too many connections from your trust (%s) - see https://www.quakenet.org/help/trusts/connection-limit for details.", IPtostr(*ipaddress));
 134       return POLICY_FAILURE_GROUPCOUNT;
 135     }
 136
 137     if((tg->flags & TRUST_ENFORCE_IDENT) && (username[0] == '~')) {
 138       controlwall(NO_OPER, NL_CLONING, "Ident required: %s@%s (group: %s).", username, IPtostr(*ipaddress), tg->name->content);
 139       snprintf(message, messagelen, "IDENTD required from your host (%s) - see https://www.quakenet.org/help/trusts/connection-limit for details.", IPtostr(*ipaddress));
 140       return POLICY_FAILURE_IDENTD;
 141     }
 142
 143     if(tg->maxperident > 0) {
 144       int identcount = 0;
 145       trusthost *th2;
 146       nick *tnp;
 147
 148       for(th2=tg->hosts;th2;th2=th2->next) {
 149         for(tnp=th2->users;tnp;tnp=nextbytrust(tnp)) {
 150           if(!ircd_strcmp(tnp->ident, username))
 151             identcount++;
 152         }
 153       }
 154
 155       if(identcount + usercountadjustment > tg->maxperident) {
 156         controlwall(NO_OPER, NL_CLONING, "Hard ident limit exceeded: %s@%s (group: %s): %d connected, %d max.", username, IPtostr(*ipaddress), tg->name->content, identcount + usercountadjustment, tg->maxperident);
 157         snprintf(message, messagelen, "Too many connections from your username (%s@%s) - see https://www.quakenet.org/help/trusts/connection-limit for details.", username, IPtostr(*ipaddress));
 158         return POLICY_FAILURE_IDENTCOUNT;
 159       }
 160     }
 161   } else {
 162     if(tg->count < tg->maxusage)
 163       tg->exts[countext] = (void *)(long)tg->count;
 164   }
 165
 166   if(tg->trustedfor > 0)
 167     snprintf(message, messagelen, "Trust has %d out of %d allowed connections.", tg->count + usercountadjustment, tg->trustedfor);
 168
 169   if(unthrottle && (tg->flags & TRUST_UNTHROTTLE))
 170     *unthrottle = 1;
 171
 172   return POLICY_SUCCESS;
 173 }
 174
 175 static int trustdowrite(trustsocket *sock, char *format, ...) {
 176   char buf[1024];
 177   va_list va;
 178   int r;
 179
 180   va_start(va, format);
 181   r = vsnprintf(buf, sizeof(buf), format, va);
 182   va_end(va);
 183
 184   if(r >= sizeof(buf))
 185     r = sizeof(buf) - 1;
 186
 187   buf[r] = '\n';
 188
 189   if(write(sock->fd, buf, r + 1) != r + 1)
 190     return 0;
 191   return 1;
 192 }
 193
 194 static int policycheck_auth(trustsocket *sock, const char *sequence_id, const char *username, const char *host) {
 195   char message[512];
 196   int verdict, unthrottle;
 197   struct irc_in_addr ipaddress;
 198   unsigned char bits;
 199
 200   if(!ipmask_parse(host, &ipaddress, &bits)) {
 201     sock->accepted++;
 202     return trustdowrite(sock, "PASS %s", sequence_id);
 203   }
 204
 205   verdict = checkconnection(username, &ipaddress, HOOK_TRUSTS_NEWNICK, 1, message, sizeof(message), &unthrottle);
 206
 207   if(!enforcepolicy_auth)
 208     verdict = POLICY_SUCCESS;
 209
 210   if (verdict == POLICY_SUCCESS) {
 211     sock->accepted++;
 212
 213     if (unthrottle) {
 214       sock->unthrottled++;
 215       trustdowrite(sock, "UNTHROTTLE %s", sequence_id);
 216     }
 217
 218     if(message[0])
 219       return trustdowrite(sock, "PASS %s %s", sequence_id, message);
 220     else
 221       return trustdowrite(sock, "PASS %s", sequence_id);
 222   } else {
 223     sock->rejected++;
 224
 225     controlwall(NO_OPER, NL_CLONING, "Rejected connection from %s@%s using IAuth: %s", username, host, message);
 226     return trustdowrite(sock, "KILL %s %s", sequence_id, message);
 227   }
 228 }
 229
 230 static int trustkillconnection(trustsocket *sock, char *reason) {
 231   trustdowrite(sock, "QUIT %s", reason);
 232   return 0;
 233 }
 234
 235 static void trustfreeconnection(trustsocket *sock, int unlink) {
 236   trustsocket **pnext, *ts;
 237
 238   if(!unlink) {
 239     controlwall(NO_OPER, NL_TRUSTS, "Lost connection on policy socket for '%s'.", sock->authed?sock->authuser:"<unauthenticated connection>");
 240
 241     deregisterhandler(sock->fd, 1);
 242     nsfree(POOL_TRUSTS, sock);
 243     return;
 244   }
 245
 246   for(pnext=&tslist;*pnext;pnext=&((*pnext)->next)) {
 247     ts=*pnext;
 248     if(ts == sock) {
 249       *pnext = sock->next;
 250       trustfreeconnection(sock, 0);
 251       break;
 252     }
 253   }
 254 }
 255
 256 static int handletrustauth(trustsocket *sock, char *server_name, char *mac) {
 257   int i;
 258   char *password = NULL;
 259   unsigned char digest[16];
 260   char noncehexbuf[NONCELEN * 2 + 1];
 261   char hexbuf[sizeof(digest) * 2 + 1];
 262   trustsocket *ts, **pnext;
 263
 264   for(i=0;i<MAXSERVERS;i++) {
 265     if(trustaccounts[i].used && strcmp(trustaccounts[i].server, server_name) == 0) {
 266       password = trustaccounts[i].password;
 267       break;
 268     }
 269   }
 270
 271   if (!password) {
 272     controlwall(NO_OPER, NL_TRUSTS, "Invalid servername for policy socket: '%s'", server_name);
 273     return trustkillconnection(sock, "Invalid servername.");
 274   }
 275
 276   hmacmd5 h;
 277   hmacmd5_init(&h, (unsigned char *)password, strlen(password));
 278   hmacmd5_update(&h, (unsigned char *)hmac_printhex(sock->nonce, noncehexbuf, NONCELEN), NONCELEN * 2);
 279   hmacmd5_final(&h, digest);
 280   if(hmac_strcmp(mac, hmac_printhex(digest, hexbuf, sizeof(digest)))) {
 281     controlwall(NO_OPER, NL_TRUSTS, "Invalid password for policy socket with servername '%s'.", server_name);
 282     return trustkillconnection(sock, "Bad MAC.");
 283   }
 284
 285   for(pnext=&tslist;*pnext;pnext=&((*pnext)->next)) {
 286     ts = *pnext;
 287     if(ts->authed && strcmp(ts->authuser, server_name) == 0) {
 288       trustkillconnection(ts, "New connection with same server name.");
 289       *pnext = ts->next;
 290       trustfreeconnection(ts, 0);
 291       break;
 292     }
 293   }
 294
 295   sock->authed = 1;
 296   strncpy(sock->authuser, server_name, SERVERLEN);
 297
 298   controlwall(NO_OPER, NL_TRUSTS, "Successful authentication for policy socket with servername '%s'.", server_name);
 299   return trustdowrite(sock, "AUTHOK");
 300 }
 301
 302 #define MAXTOKENS 10
 303 static int handletrustline(trustsocket *sock, char *line) {
 304   char *command, *p, *lastpos;
 305   char *tokens[MAXTOKENS];
 306   int tokensfound = -1;
 307
 308   for(command=lastpos=p=line;*p;p++) {
 309     if(*p == ' ') {
 310       *p = '\0';
 311       if(tokensfound == MAXTOKENS)
 312         return trustkillconnection(sock, "too many tokens");
 313
 314       if(tokensfound >= 0) {
 315         tokens[tokensfound++] = lastpos;
 316       } else {
 317         tokensfound++;
 318       }
 319       lastpos = p + 1;
 320     }
 321   }
 322   if(lastpos != p) {
 323     if(tokensfound == MAXTOKENS)
 324       return trustkillconnection(sock, "too many tokens");
 325     tokens[tokensfound++] = lastpos;
 326   }
 327
 328   if(!sock->authed && !strcmp("AUTH", command)) {
 329     if(tokensfound != 2)
 330       return trustkillconnection(sock, "incorrect arg count for command.");
 331
 332     return handletrustauth(sock, tokens[0], tokens[1]);
 333   } else if(sock->authed && !strcmp("CHECK", command)) {
 334     if(tokensfound != 3)
 335       return trustkillconnection(sock, "incorrect arg count for command.");
 336
 337     policycheck_auth(sock, tokens[0], tokens[1], tokens[2]);
 338     return 1;
 339   } else if(!strcmp("VERSION", command)) {
 340     /* Ignore this command for now. */
 341     return 1;
 342   } else {
 343     Error("trusts_policy", ERR_WARNING, "Bad command: %s", command);
 344     return 0;
 345   }
 346 }
 347
 348 static trustsocket *findtrustsocketbyfd(int fd) {
 349   for(trustsocket *ts=tslist;ts;ts=ts->next)
 350     if(ts->fd==fd)
 351       return ts;
 352
 353   return NULL;
 354 }
 355
 356 static int handletrustclient(trustsocket *sock) {
 357   int r, remaining = TRUSTBUFSIZE - sock->size, i;
 358   char *lastpos, *c;
 359
 360   if(!remaining) {
 361     trustkillconnection(sock, "Buffer overflow.");
 362     return 0;
 363   }
 364
 365   r = read(sock->fd, sock->buf + sock->size, remaining);
 366   if(r <= 0)
 367     return 0;
 368
 369   sock->size+=r;
 370   lastpos = sock->buf;
 371
 372   for(c=sock->buf,i=0;i<sock->size;i++,c++) {
 373     if(*c != '\n')
 374       continue;
 375     *c = '\0';
 376     if(!handletrustline(sock, lastpos))
 377       return 0;
 378
 379     lastpos = c + 1; /* is this ok? */
 380   }
 381   sock->size-=lastpos - sock->buf;
 382   memmove(sock->buf, lastpos, sock->size);
 383
 384   return 1;
 385 }
 386
 387 static void processtrustclient(int fd, short events) {
 388   trustsocket *sock = findtrustsocketbyfd(fd);
 389
 390   if(!sock)
 391     return;
 392
 393   if (events & (POLLPRI | POLLERR | POLLHUP | POLLNVAL)) {
 394     trustfreeconnection(sock, 1);
 395     return;
 396   }
 397
 398   if(events & POLLIN)
 399     if(!handletrustclient(sock))
 400       trustfreeconnection(sock, 1);
 401 }
 402
 403 static void trustdotimeout(void *arg) {
 404   time_t t = time(NULL);
 405   trustsocket **pnext, *sock;
 406
 407   for(pnext=&tslist;*pnext;pnext=&((*pnext)->next)) {
 408     sock = *pnext;
 409     if(!sock->authed && t >= sock->timeout) {
 410       trustkillconnection(sock, "Auth timeout.");
 411       *pnext = sock->next;
 412       trustfreeconnection(sock, 0);
 413     }
 414   }
 415 }
 416
 417 static void processtrustlistener(int fd, short events) {
 418   if(events & POLLIN) {
 419     trustsocket *sock;
 420     char buf[NONCELEN * 2 + 1];
 421
 422     int newfd = accept(fd, NULL, NULL), flags;
 423     if(newfd == -1)
 424       return;
 425
 426     flags = fcntl(newfd, F_GETFL, 0);
 427     if(flags < 0) {
 428       Error("trusts_policy", ERR_WARNING, "Unable to set socket non-blocking.");
 429       close(newfd);
 430       return;
 431     }
 432
 433     if(fcntl(fd, F_SETFL, flags|O_NONBLOCK) < 0) {
 434       Error("trusts_policy", ERR_WARNING, "Unable to set socket non-blocking.");
 435       close(newfd);
 436       return;
 437     }
 438
 439     registerhandler(newfd, POLLIN|POLLERR|POLLHUP, processtrustclient);
 440
 441     sock = nsmalloc(POOL_TRUSTS, sizeof(trustsocket));
 442     if(!sock) {
 443       deregisterhandler(newfd, 1);
 444       return;
 445     }
 446
 447     sock->fd = newfd;
 448     sock->next = tslist;
 449     tslist = sock;
 450
 451     if(fread((char *)sock->nonce, 1, NONCELEN, urandom) != NONCELEN) {
 452       Error("trusts_policy", ERR_WARNING, "Error getting random bytes.");
 453       deregisterhandler(newfd, 1);
 454       tslist = sock->next;
 455       nsfree(POOL_TRUSTS, sock);
 456     } else {
 457       sock->authed = 0;
 458       sock->size = 0;
 459       sock->connected = time(NULL);
 460       sock->timeout = time(NULL) + 30;
 461       sock->accepted = 0;
 462       sock->rejected = 0;
 463       sock->unthrottled = 0;
 464       if(!trustdowrite(sock, "AUTH %s", hmac_printhex(sock->nonce, buf, NONCELEN))) {
 465         Error("trusts_policy", ERR_WARNING, "Error writing auth to fd %d.", newfd);
 466         deregisterhandler(newfd, 1);
 467         tslist = sock->next;
 468         nsfree(POOL_TRUSTS, sock);
 469         return;
 470       }
 471     }
 472   }
 473 }
 474
 475 static int createlistenersock(int port) {
 476   struct sockaddr_in s;
 477   int fd;
 478   int optval;
 479
 480   memset(&s, 0, sizeof(struct sockaddr_in));
 481   s.sin_family = AF_INET;
 482   s.sin_addr.s_addr = INADDR_ANY;
 483   s.sin_port = htons(port);
 484
 485   fd = socket(PF_INET, SOCK_STREAM, 0);
 486   if(fd < 0) {
 487     Error("trusts_policy", ERR_WARNING, "Unable to get socket for trustfd.");
 488     return -1;
 489   }
 490
 491   optval = 1;
 492   setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
 493
 494   if(bind(fd, (struct sockaddr *)&s, sizeof(struct sockaddr_in)) < 0) {
 495     Error("trusts_policy", ERR_WARNING, "Unable to bind trustfd.");
 496     close(fd);
 497     return -1;
 498   }
 499
 500   if(listen(fd, 5) < 0) {
 501     Error("trusts_policy", ERR_WARNING, "Unable to listen on trustfd.");
 502     close(fd);
 503     return -1;
 504   }
 505
 506   registerhandler(fd, POLLIN, processtrustlistener);
 507
 508   return fd;
 509 }
 510
 511 static void policycheck_irc(int hooknum, void *arg) {
 512   void **args = arg;
 513   nick *np = args[0];
 514   long moving = (long)args[1];
 515   char message[512];
 516   int verdict, unthrottle;
 517
 518   if(moving)
 519     return;
 520
 521   verdict = checkconnection(np->ident, &np->ipaddress, hooknum, 0, message, sizeof(message), &unthrottle);
 522
 523   if(!enforcepolicy_irc)
 524     verdict = POLICY_SUCCESS;
 525
 526   switch (verdict) {
 527     case POLICY_FAILURE_NODECOUNT:
 528       glinebynick(np, POLICY_GLINE_DURATION, message, GLINE_IGNORE_TRUST, "trusts_policy");
 529       break;
 530     case POLICY_FAILURE_IDENTD:
 531       glinebyip("~*", &np->ipaddress, 128, POLICY_GLINE_DURATION, message, GLINE_ALWAYS_USER|GLINE_IGNORE_TRUST, "trusts_policy");
 532       break;
 533     case POLICY_FAILURE_IDENTCOUNT:
 534       glinebynick(np, POLICY_GLINE_DURATION, message, GLINE_ALWAYS_USER|GLINE_IGNORE_TRUST, "trusts_policy");
 535       break;
 536   }
 537
 538 }
 539
 540 static int trusts_cmdtrustpolicyirc(void *source, int cargc, char **cargv) {
 541   nick *sender = source;
 542
 543   if(cargc < 1) {
 544     controlreply(sender, "Use of glines for trust policy enforcement is currently %s.", enforcepolicy_irc?"enabled":"disabled");
 545     return CMD_OK;
 546   }
 547
 548   enforcepolicy_irc = atoi(cargv[0]);
 549   controlwall(NO_OPER, NL_TRUSTS, "%s %s use of glines for trust policy enforcement.", controlid(sender), enforcepolicy_irc?"enabled":"disabled");
 550   controlreply(sender, "Use of glines for trust policy enforcement is now %s.", enforcepolicy_irc?"enabled":"disabled");
 551
 552   return CMD_OK;
 553 }
 554
 555 static int trusts_cmdtrustpolicyauth(void *source, int cargc, char **cargv) {
 556   nick *sender = source;
 557
 558   if(cargc < 1) {
 559     controlreply(sender, "Trust policy enforcement with IAuth is currently %s.", enforcepolicy_auth?"enabled":"disabled");
 560     return CMD_OK;
 561   }
 562
 563   enforcepolicy_auth = atoi(cargv[0]);
 564   controlwall(NO_OPER, NL_TRUSTS, "%s %s trust policy enforcement with IAuth.", controlid(sender), enforcepolicy_auth?"enabled":"disabled");
 565   controlreply(sender, "Trust policy enforcement with IAuth is now %s.", enforcepolicy_auth?"enabled":"disabled");
 566
 567   return CMD_OK;
 568 }
 569
 570
 571 static int trusts_cmdtrustsockets(void *source, int cargc, char **cargv) {
 572   nick *sender = source;
 573   time_t now;
 574   trustsocket *sock;
 575
 576   time(&now);
 577
 578   controlreply(sender, "Server                              Connected for        Accepted        Rejected        Unthrottled");
 579
 580   for(sock=tslist;sock;sock=sock->next)
 581     controlreply(sender, "%-35s %-20s %-15d %-15d %-15d", sock->authed?sock->authuser:"<unauthenticated connection>", longtoduration(now - sock->connected, 0), sock->accepted, sock->rejected, sock->unthrottled);
 582
 583   controlreply(sender, "-- End of list.");
 584   return CMD_OK;
 585 }
 586
 587 void loadtrustaccounts(void) {
 588   array *accts;
 589
 590   memset(trustaccounts, 0, sizeof(trustaccounts));
 591
 592   accts = getconfigitems("trusts_policy", "server");
 593   if(!accts) {
 594     Error("trusts_policy", ERR_INFO, "No servers added.");
 595   } else {
 596     sstring **servers = (sstring **)(accts->content);
 597     int i;
 598     for(i=0;i<accts->cursi;i++) {
 599       char server[512];
 600       char *pos;
 601
 602       if(i>=MAXSERVERS) {
 603         Error("trusts_policy", ERR_INFO, "Too many servers specified.");
 604         break;
 605       }
 606
 607       strncpy(server, servers[i]->content, sizeof(server));
 608
 609       pos = strchr(server, ',');
 610
 611       if(!pos) {
 612         Error("trusts_policy", ERR_INFO, "Server line is missing password: %s", server);
 613         continue;
 614       }
 615
 616       *pos = '\0';
 617
 618       trustaccounts[i].used = 1;
 619       strncpy(trustaccounts[i].server, server, SERVERLEN);
 620       strncpy(trustaccounts[i].password, pos+1, TRUSTPASSLEN);
 621     }
 622   }
 623 }
 624
 625 static void trustaccounts_rehash(int hooknum, void *arg) {
 626   loadtrustaccounts();
 627 }
 628
 629 void _init(void) {
 630   sstring *m;
 631   int trustport;
 632
 633   countext = registertgext("count");
 634   if(countext == -1)
 635     return;
 636
 637   m = getconfigitem("trusts_policy", "enforcepolicy_irc");
 638   if(m)
 639     enforcepolicy_irc = atoi(m->content);
 640
 641   m = getconfigitem("trusts_policy", "enforcepolicy_auth");
 642   if(m)
 643     enforcepolicy_auth = atoi(m->content);
 644
 645   m = getconfigitem("trusts_policy", "trustport");
 646   if(m)
 647     trustport = atoi(m->content);
 648   else
 649     trustport = DEFAULT_TRUSTPORT;
 650
 651   if(trustport)
 652     listenerfd = createlistenersock(trustport);
 653
 654   loadtrustaccounts();
 655
 656   registerhook(HOOK_TRUSTS_NEWNICK, policycheck_irc);
 657   registerhook(HOOK_TRUSTS_LOSTNICK, &policycheck_irc);
 658   registerhook(HOOK_CORE_REHASH, trustaccounts_rehash);
 659
 660   registercontrolhelpcmd("trustpolicyirc", NO_DEVELOPER, 1, trusts_cmdtrustpolicyirc, "Usage: trustpolicyirc ?1|0?\nEnables or disables policy enforcement (IRC). Shows current status when no parameter is specified.");
 661   registercontrolhelpcmd("trustpolicyauth", NO_DEVELOPER, 1, trusts_cmdtrustpolicyauth, "Usage: trustpolicyauth ?1|0?\nEnables or disables policy enforcement (IAuth). Shows current status when no parameter is specified.");
 662   registercontrolhelpcmd("trustsockets", NO_DEVELOPER, 0, trusts_cmdtrustsockets, "Usage: trustsockets\nLists all currently active TRUST sockets.");
 663
 664   schedulerecurring(time(NULL)+1, 0, 5, trustdotimeout, NULL);
 665
 666   urandom = fopen("/dev/urandom", "rb");
 667   if(!urandom)
 668     Error("trusts_policy", ERR_ERROR, "Couldn't open /dev/urandom.");
 669 }
 670
 671 void _fini(void) {
 672   trustsocket *sock, *next;
 673
 674   if(countext == -1)
 675     return;
 676
 677   releasetgext(countext);
 678
 679   deregisterhook(HOOK_TRUSTS_NEWNICK, policycheck_irc);
 680   deregisterhook(HOOK_TRUSTS_LOSTNICK, policycheck_irc);
 681   deregisterhook(HOOK_CORE_REHASH, trustaccounts_rehash);
 682
 683   deregistercontrolcmd("trustpolicyirc", trusts_cmdtrustpolicyirc);
 684   deregistercontrolcmd("trustpolicyauth", trusts_cmdtrustpolicyauth);
 685   deregistercontrolcmd("trustsockets", trusts_cmdtrustsockets);
 686
 687   deleteallschedules(trustdotimeout);
 688
 689   if (urandom)
 690     fclose(urandom);
 691
 692   if (listenerfd != -1)
 693     deregisterhandler(listenerfd, 1);
 694
 695   for(sock=tslist;sock;) {
 696     next = sock->next;
 697
 698     trustkillconnection(sock, "Unloading module.");
 699     trustfreeconnection(sock, 0);
 700
 701     sock = next;
 702   }
 703 }