src/hostmask.c

   1 /*
   2  *  charybdis: an advanced internet relay chat daemon (ircd).
   3  *  hostmask.c: Code to efficiently find IP & hostmask based configs.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *  Copyright (C) 2005-2008 charybdis development team
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  23  *  USA
  24  *
  25  *  $Id: hostmask.c 2757 2006-11-10 22:58:15Z jilles $
  26  */
  27
  28 #include "stdinc.h"
  29 #include "memory.h"
  30 #include "ircd_defs.h"
  31 #include "s_conf.h"
  32 #include "hostmask.h"
  33 #include "numeric.h"
  34 #include "send.h"
  35 #include "irc_string.h"
  36
  37 #ifdef IPV6
  38 static unsigned long hash_ipv6(struct sockaddr *, int);
  39 #endif
  40 static unsigned long hash_ipv4(struct sockaddr *, int);
  41
  42
  43 /* int parse_netmask(const char *, struct irc_sockaddr_storage *, int *);
  44  * Input: A hostmask, or an IPV4/6 address.
  45  * Output: An integer describing whether it is an IPV4, IPV6 address or a
  46  *         hostmask, an address(if it is an IP mask),
  47  *         a bitlength(if it is IP mask).
  48  * Side effects: None
  49  */
  50 int
  51 parse_netmask(const char *text, struct sockaddr  *naddr, int *nb)
  52 {
  53         char *ip = LOCAL_COPY(text);
  54         char *ptr;
  55         struct irc_sockaddr_storage *addr, xaddr;
  56         int *b, xb;
  57         if(nb == NULL)
  58                 b = &xb;
  59         else
  60                 b = nb;
  61
  62         if(naddr == NULL)
  63                 addr = (struct irc_sockaddr_storage *)&xaddr;
  64         else
  65                 addr = (struct irc_sockaddr_storage *)naddr;
  66
  67 #ifdef IPV6
  68         if(strchr(ip, ':'))
  69         {
  70                 if((ptr = strchr(ip, '/')))
  71                 {
  72                         *ptr = '\0';
  73                         ptr++;
  74                         *b = atoi(ptr);
  75                         if(*b > 128)
  76                                 *b = 128;
  77                 } else
  78                         *b = 128;
  79                 if(inetpton_sock(ip, (struct sockaddr *)addr) > 0)
  80                         return HM_IPV6;
  81                 else
  82                         return HM_HOST;
  83         } else
  84 #endif
  85         if(strchr(text, '.'))
  86         {
  87                 if((ptr = strchr(ip, '/')))
  88                 {
  89                         *ptr = '\0';
  90                         ptr++;
  91                         *b = atoi(ptr);
  92                         if(*b > 32)
  93                                 *b = 32;
  94                 } else
  95                         *b = 32;
  96                 if(inetpton_sock(ip, (struct sockaddr *)addr) > 0)
  97                         return HM_IPV4;
  98                 else
  99                         return HM_HOST;
 100         }
 101         return HM_HOST;
 102 }
 103
 104 /* Hashtable stuff...now external as its used in m_stats.c */
 105 struct AddressRec *atable[ATABLE_SIZE];
 106
 107 void
 108 init_host_hash(void)
 109 {
 110         memset(&atable, 0, sizeof(atable));
 111 }
 112
 113 /* unsigned long hash_ipv4(struct irc_sockaddr_storage*)
 114  * Input: An IP address.
 115  * Output: A hash value of the IP address.
 116  * Side effects: None
 117  */
 118 static unsigned long
 119 hash_ipv4(struct sockaddr *saddr, int bits)
 120 {
 121         struct sockaddr_in *addr = (struct sockaddr_in *) saddr;
 122
 123         if(bits != 0)
 124         {
 125                 unsigned long av = ntohl(addr->sin_addr.s_addr) & ~((1 << (32 - bits)) - 1);
 126                 return (av ^ (av >> 12) ^ (av >> 24)) & (ATABLE_SIZE - 1);
 127         }
 128
 129         return 0;
 130 }
 131
 132 /* unsigned long hash_ipv6(struct irc_sockaddr_storage*)
 133  * Input: An IP address.
 134  * Output: A hash value of the IP address.
 135  * Side effects: None
 136  */
 137 #ifdef IPV6
 138 static unsigned long
 139 hash_ipv6(struct sockaddr *saddr, int bits)
 140 {
 141         struct sockaddr_in6 *addr = (struct sockaddr_in6 *) saddr;
 142         unsigned long v = 0, n;
 143         for (n = 0; n < 16; n++)
 144         {
 145                 if(bits >= 8)
 146                 {
 147                         v ^= addr->sin6_addr.s6_addr[n];
 148                         bits -= 8;
 149                 }
 150                 else if(bits)
 151                 {
 152                         v ^= addr->sin6_addr.s6_addr[n] & ~((1 << (8 - bits)) - 1);
 153                         return v & (ATABLE_SIZE - 1);
 154                 }
 155                 else
 156                         return v & (ATABLE_SIZE - 1);
 157         }
 158         return v & (ATABLE_SIZE - 1);
 159 }
 160 #endif
 161
 162 /* int hash_text(const char *start)
 163  * Input: The start of the text to hash.
 164  * Output: The hash of the string between 1 and (TH_MAX-1)
 165  * Side-effects: None.
 166  */
 167 static int
 168 hash_text(const char *start)
 169 {
 170         const char *p = start;
 171         unsigned long h = 0;
 172
 173         while(*p)
 174         {
 175                 h = (h << 4) - (h + (unsigned char) ToLower(*p++));
 176         }
 177
 178         return (h & (ATABLE_SIZE - 1));
 179 }
 180
 181 /* unsigned long get_hash_mask(const char *)
 182  * Input: The text to hash.
 183  * Output: The hash of the string right of the first '.' past the last
 184  *         wildcard in the string.
 185  * Side-effects: None.
 186  */
 187 static unsigned long
 188 get_mask_hash(const char *text)
 189 {
 190         const char *hp = "", *p;
 191
 192         for (p = text + strlen(text) - 1; p >= text; p--)
 193                 if(*p == '*' || *p == '?')
 194                         return hash_text(hp);
 195                 else if(*p == '.')
 196                         hp = p + 1;
 197         return hash_text(text);
 198 }
 199
 200 /* struct ConfItem* find_conf_by_address(const char*, struct irc_sockaddr_storage*,
 201  *         int type, int fam, const char *username)
 202  * Input: The hostname, the address, the type of mask to find, the address
 203  *        family, the username.
 204  * Output: The matching value with the highest precedence.
 205  * Side-effects: None
 206  * Note: Setting bit 0 of the type means that the username is ignored.
 207  */
 208 struct ConfItem *
 209 find_conf_by_address(const char *name, const char *sockhost,
 210                         const char *orighost,
 211                         struct sockaddr *addr, int type, int fam,
 212                         const char *username)
 213 {
 214         unsigned long hprecv = 0;
 215         struct ConfItem *hprec = NULL;
 216         struct AddressRec *arec;
 217         int b;
 218
 219         if(username == NULL)
 220                 username = "";
 221
 222         if(addr)
 223         {
 224                 /* Check for IPV6 matches... */
 225 #ifdef IPV6
 226                 if(fam == AF_INET6)
 227                 {
 228
 229                         for (b = 128; b >= 0; b -= 16)
 230                         {
 231                                 for (arec = atable[hash_ipv6(addr, b)]; arec; arec = arec->next)
 232                                         if(arec->type == (type & ~0x1) &&
 233                                            arec->masktype == HM_IPV6 &&
 234                                            comp_with_mask_sock(addr, (struct sockaddr *)&arec->Mask.ipa.addr,
 235                                                                arec->Mask.ipa.bits) && (type & 0x1
 236                                                                                         ||
 237                                                                                         match(arec->
 238                                                                                               username,
 239                                                                                               username))
 240                                            && arec->precedence > hprecv)
 241                                         {
 242                                                 hprecv = arec->precedence;
 243                                                 hprec = arec->aconf;
 244                                         }
 245                         }
 246                 }
 247                 else
 248 #endif
 249                 if(fam == AF_INET)
 250                 {
 251                         for (b = 32; b >= 0; b -= 8)
 252                         {
 253                                 for (arec = atable[hash_ipv4(addr, b)]; arec; arec = arec->next)
 254                                         if(arec->type == (type & ~0x1) &&
 255                                            arec->masktype == HM_IPV4 &&
 256                                            arec->precedence > hprecv &&
 257                                            comp_with_mask_sock(addr, (struct sockaddr *)&arec->Mask.ipa.addr,
 258                                                                arec->Mask.ipa.bits) &&
 259                                            (type & 0x1 || match(arec->username, username)))
 260                                         {
 261                                                 hprecv = arec->precedence;
 262                                                 hprec = arec->aconf;
 263                                         }
 264                         }
 265                 }
 266         }
 267
 268         if(orighost != NULL)
 269         {
 270                 const char *p;
 271
 272                 for (p = orighost; p != NULL;)
 273                 {
 274                         for (arec = atable[hash_text(p)]; arec; arec = arec->next)
 275
 276                                 if((arec->type == (type & ~0x1)) &&
 277                                    (arec->masktype == HM_HOST) &&
 278                                    arec->precedence > hprecv &&
 279                                    match(arec->Mask.hostname, orighost) &&
 280                                    (type & 0x1 || match(arec->username, username)))
 281                                 {
 282                                         hprecv = arec->precedence;
 283                                         hprec = arec->aconf;
 284                                 }
 285                         p = strchr(p, '.');
 286                         if(p != NULL)
 287                                 p++;
 288                         else
 289                                 break;
 290                 }
 291                 for (arec = atable[0]; arec; arec = arec->next)
 292                 {
 293                         if(arec->type == (type & ~0x1) &&
 294                            arec->masktype == HM_HOST &&
 295                            arec->precedence > hprecv &&
 296                            (match(arec->Mask.hostname, orighost) ||
 297                             (sockhost && match(arec->Mask.hostname, sockhost))) &&
 298                            (type & 0x1 || match(arec->username, username)))
 299                         {
 300                                 hprecv = arec->precedence;
 301                                 hprec = arec->aconf;
 302                         }
 303                 }
 304         }
 305
 306         if(name != NULL)
 307         {
 308                 const char *p;
 309                 /* And yes - we have to check p after strchr and p after increment for
 310                  * NULL -kre */
 311                 for (p = name; p != NULL;)
 312                 {
 313                         for (arec = atable[hash_text(p)]; arec; arec = arec->next)
 314                                 if((arec->type == (type & ~0x1)) &&
 315                                    (arec->masktype == HM_HOST) &&
 316                                    arec->precedence > hprecv &&
 317                                    match(arec->Mask.hostname, name) &&
 318                                    (type & 0x1 || match(arec->username, username)))
 319                                 {
 320                                         hprecv = arec->precedence;
 321                                         hprec = arec->aconf;
 322                                 }
 323                         p = strchr(p, '.');
 324                         if(p != NULL)
 325                                 p++;
 326                         else
 327                                 break;
 328                 }
 329                 for (arec = atable[0]; arec; arec = arec->next)
 330                 {
 331                         if(arec->type == (type & ~0x1) &&
 332                            arec->masktype == HM_HOST &&
 333                            arec->precedence > hprecv &&
 334                            (match(arec->Mask.hostname, name) ||
 335                             (sockhost && match(arec->Mask.hostname, sockhost))) &&
 336                            (type & 0x1 || match(arec->username, username)))
 337                         {
 338                                 hprecv = arec->precedence;
 339                                 hprec = arec->aconf;
 340                         }
 341                 }
 342         }
 343         return hprec;
 344 }
 345
 346 /* struct ConfItem* find_address_conf(const char*, const char*,
 347  *                                     struct irc_sockaddr_storage*, int);
 348  * Input: The hostname, username, address, address family.
 349  * Output: The applicable ConfItem.
 350  * Side-effects: None
 351  */
 352 struct ConfItem *
 353 find_address_conf(const char *host, const char *sockhost, const char *user,
 354                 const char *notildeuser, struct sockaddr *ip, int aftype)
 355 {
 356         struct ConfItem *iconf, *kconf;
 357         const char *vuser;
 358
 359         /* Find the best I-line... If none, return NULL -A1kmm */
 360         if(!(iconf = find_conf_by_address(host, sockhost, NULL, ip, CONF_CLIENT, aftype, user)))
 361                 return NULL;
 362         /* Find what their visible username will be.
 363          * Note that the username without tilde may contain one char more.
 364          * -- jilles */
 365         vuser = IsNoTilde(iconf) ? notildeuser : user;
 366
 367         /* If they are exempt from K-lines, return the best I-line. -A1kmm */
 368         if(IsConfExemptKline(iconf))
 369                 return iconf;
 370
 371         /* Find the best K-line... -A1kmm */
 372         kconf = find_conf_by_address(host, sockhost, NULL, ip, CONF_KILL, aftype, user);
 373
 374         /* If they are K-lined, return the K-line */
 375         if(kconf)
 376                 return kconf;
 377
 378         /* if theres a spoof, check it against klines.. */
 379         if(IsConfDoSpoofIp(iconf))
 380         {
 381                 char *p = strchr(iconf->name, '@');
 382
 383                 /* note, we dont need to pass sockhost here, as its
 384                  * guaranteed to not match by whats above.. --anfl
 385                  */
 386                 if(p)
 387                 {
 388                         *p = '\0';
 389                         kconf = find_conf_by_address(p+1, NULL, NULL, ip, CONF_KILL, aftype, iconf->name);
 390                         *p = '@';
 391                 }
 392                 else
 393                         kconf = find_conf_by_address(iconf->name, NULL, NULL, ip, CONF_KILL, aftype, vuser);
 394
 395                 if(kconf)
 396                         return kconf;
 397         }
 398
 399         /* if no_tilde, check the username without tilde against klines too
 400          * -- jilles */
 401         if(user != vuser)
 402         {
 403                 kconf = find_conf_by_address(host, sockhost, NULL, ip, CONF_KILL, aftype, vuser);
 404                 if(kconf)
 405                         return kconf;
 406         }
 407
 408         /* hunt for a gline */
 409         if(ConfigFileEntry.glines)
 410         {
 411                 kconf = find_conf_by_address(host, sockhost, NULL, ip, CONF_GLINE, aftype, user);
 412
 413                 if((kconf != NULL) && !IsConfExemptGline(iconf))
 414                         return kconf;
 415         }
 416
 417         return iconf;
 418 }
 419
 420 /* struct ConfItem* find_dline(struct irc_sockaddr_storage*, int)
 421  * Input: An address, an address family.
 422  * Output: The best matching D-line or exempt line.
 423  * Side effects: None.
 424  */
 425 struct ConfItem *
 426 find_dline(struct sockaddr *addr, int aftype)
 427 {
 428         struct ConfItem *eline;
 429         eline = find_conf_by_address(NULL, NULL, NULL, addr, CONF_EXEMPTDLINE | 1, aftype, NULL);
 430         if(eline)
 431                 return eline;
 432         return find_conf_by_address(NULL, NULL, NULL, addr, CONF_DLINE | 1, aftype, NULL);
 433 }
 434
 435 /* void find_exact_conf_by_address(const char*, int, const char *)
 436  * Input:
 437  * Output: ConfItem if found
 438  * Side-effects: None
 439  */
 440 struct ConfItem *
 441 find_exact_conf_by_address(const char *address, int type, const char *username)
 442 {
 443         int masktype, bits;
 444         unsigned long hv;
 445         struct AddressRec *arec;
 446         struct irc_sockaddr_storage addr;
 447
 448         if(address == NULL)
 449                 address = "/NOMATCH!/";
 450         arec = MyMalloc(sizeof(struct AddressRec));
 451         masktype = parse_netmask(address, (struct sockaddr *)&addr, &bits);
 452 #ifdef IPV6
 453         if(masktype == HM_IPV6)
 454         {
 455                 /* We have to do this, since we do not re-hash for every bit -A1kmm. */
 456                 hv = hash_ipv6((struct sockaddr *)&addr, bits - bits % 16);
 457         }
 458         else
 459 #endif
 460         if(masktype == HM_IPV4)
 461         {
 462                 /* We have to do this, since we do not re-hash for every bit -A1kmm. */
 463                 hv = hash_ipv4((struct sockaddr *)&addr, bits - bits % 8);
 464         }
 465         else
 466         {
 467                 hv = get_mask_hash(address);
 468         }
 469         for (arec = atable[hv]; arec; arec = arec->next)
 470         {
 471                 if (arec->type == type &&
 472                                 arec->masktype == masktype &&
 473                                 (arec->username == NULL || username == NULL ? arec->username == username : !irccmp(arec->username, username)))
 474                 {
 475                         if (masktype == HM_HOST)
 476                         {
 477                                 if (!irccmp(arec->Mask.hostname, address))
 478                                         return arec->aconf;
 479                         }
 480                         else
 481                         {
 482                                 if (arec->Mask.ipa.bits == bits &&
 483                                         comp_with_mask_sock((struct sockaddr *)&arec->Mask.ipa.addr, (struct sockaddr *)&addr, bits))
 484                                         return arec->aconf;
 485                         }
 486                 }
 487         }
 488         return NULL;
 489 }
 490
 491 /* void add_conf_by_address(const char*, int, const char *,
 492  *         struct ConfItem *aconf)
 493  * Input:
 494  * Output: None
 495  * Side-effects: Adds this entry to the hash table.
 496  */
 497 void
 498 add_conf_by_address(const char *address, int type, const char *username, struct ConfItem *aconf)
 499 {
 500         static unsigned long prec_value = 0xFFFFFFFF;
 501         int masktype, bits;
 502         unsigned long hv;
 503         struct AddressRec *arec;
 504
 505         if(address == NULL)
 506                 address = "/NOMATCH!/";
 507         arec = MyMalloc(sizeof(struct AddressRec));
 508         masktype = parse_netmask(address, (struct sockaddr *)&arec->Mask.ipa.addr, &bits);
 509         arec->Mask.ipa.bits = bits;
 510         arec->masktype = masktype;
 511 #ifdef IPV6
 512         if(masktype == HM_IPV6)
 513         {
 514                 /* We have to do this, since we do not re-hash for every bit -A1kmm. */
 515                 bits -= bits % 16;
 516                 arec->next = atable[(hv = hash_ipv6((struct sockaddr *)&arec->Mask.ipa.addr, bits))];
 517                 atable[hv] = arec;
 518         }
 519         else
 520 #endif
 521         if(masktype == HM_IPV4)
 522         {
 523                 /* We have to do this, since we do not re-hash for every bit -A1kmm. */
 524                 bits -= bits % 8;
 525                 arec->next = atable[(hv = hash_ipv4((struct sockaddr *)&arec->Mask.ipa.addr, bits))];
 526                 atable[hv] = arec;
 527         }
 528         else
 529         {
 530                 arec->Mask.hostname = address;
 531                 arec->next = atable[(hv = get_mask_hash(address))];
 532                 atable[hv] = arec;
 533         }
 534         arec->username = username;
 535         arec->aconf = aconf;
 536         arec->precedence = prec_value--;
 537         arec->type = type;
 538 }
 539
 540 /* void delete_one_address(const char*, struct ConfItem*)
 541  * Input: An address string, the associated ConfItem.
 542  * Output: None
 543  * Side effects: Deletes an address record. Frees the ConfItem if there
 544  *               is nothing referencing it, sets it as illegal otherwise.
 545  */
 546 void
 547 delete_one_address_conf(const char *address, struct ConfItem *aconf)
 548 {
 549         int masktype, bits;
 550         unsigned long hv;
 551         struct AddressRec *arec, *arecl = NULL;
 552         struct irc_sockaddr_storage addr;
 553         masktype = parse_netmask(address, (struct sockaddr *)&addr, &bits);
 554 #ifdef IPV6
 555         if(masktype == HM_IPV6)
 556         {
 557                 /* We have to do this, since we do not re-hash for every bit -A1kmm. */
 558                 bits -= bits % 16;
 559                 hv = hash_ipv6((struct sockaddr *)&addr, bits);
 560         }
 561         else
 562 #endif
 563         if(masktype == HM_IPV4)
 564         {
 565                 /* We have to do this, since we do not re-hash for every bit -A1kmm. */
 566                 bits -= bits % 8;
 567                 hv = hash_ipv4((struct sockaddr *)&addr, bits);
 568         }
 569         else
 570                 hv = get_mask_hash(address);
 571         for (arec = atable[hv]; arec; arec = arec->next)
 572         {
 573                 if(arec->aconf == aconf)
 574                 {
 575                         if(arecl)
 576                                 arecl->next = arec->next;
 577                         else
 578                                 atable[hv] = arec->next;
 579                         aconf->status |= CONF_ILLEGAL;
 580                         if(!aconf->clients)
 581                                 free_conf(aconf);
 582                         MyFree(arec);
 583                         return;
 584                 }
 585                 arecl = arec;
 586         }
 587 }
 588
 589 /* void clear_out_address_conf(void)
 590  * Input: None
 591  * Output: None
 592  * Side effects: Clears out all address records in the hash table,
 593  *               frees them, and frees the ConfItems if nothing references
 594  *               them, otherwise sets them as illegal.
 595  */
 596 void
 597 clear_out_address_conf(void)
 598 {
 599         int i;
 600         struct AddressRec **store_next;
 601         struct AddressRec *arec, *arecn;
 602
 603         for (i = 0; i < ATABLE_SIZE; i++)
 604         {
 605                 store_next = &atable[i];
 606                 for (arec = atable[i]; arec; arec = arecn)
 607                 {
 608                         arecn = arec->next;
 609                         /* We keep the temporary K-lines and destroy the
 610                          * permanent ones, just to be confusing :) -A1kmm */
 611                         if(arec->aconf->flags & CONF_FLAGS_TEMPORARY ||
 612                            (arec->type != CONF_CLIENT && arec->type != CONF_EXEMPTDLINE))
 613                         {
 614                                 *store_next = arec;
 615                                 store_next = &arec->next;
 616                         }
 617                         else
 618                         {
 619                                 arec->aconf->status |= CONF_ILLEGAL;
 620                                 if(!arec->aconf->clients)
 621                                         free_conf(arec->aconf);
 622                                 MyFree(arec);
 623                         }
 624                 }
 625                 *store_next = NULL;
 626         }
 627 }
 628
 629 void
 630 clear_out_address_conf_bans(void)
 631 {
 632         int i;
 633         struct AddressRec **store_next;
 634         struct AddressRec *arec, *arecn;
 635
 636         for (i = 0; i < ATABLE_SIZE; i++)
 637         {
 638                 store_next = &atable[i];
 639                 for (arec = atable[i]; arec; arec = arecn)
 640                 {
 641                         arecn = arec->next;
 642                         /* We keep the temporary K-lines and destroy the
 643                          * permanent ones, just to be confusing :) -A1kmm */
 644                         if(arec->aconf->flags & CONF_FLAGS_TEMPORARY ||
 645                            (arec->type == CONF_CLIENT || arec->type == CONF_EXEMPTDLINE))
 646                         {
 647                                 *store_next = arec;
 648                                 store_next = &arec->next;
 649                         }
 650                         else
 651                         {
 652                                 arec->aconf->status |= CONF_ILLEGAL;
 653                                 if(!arec->aconf->clients)
 654                                         free_conf(arec->aconf);
 655                                 MyFree(arec);
 656                         }
 657                 }
 658                 *store_next = NULL;
 659         }
 660 }
 661
 662
 663 /*
 664  * show_iline_prefix()
 665  *
 666  * inputs       - pointer to struct Client requesting output
 667  *              - pointer to struct ConfItem
 668  *              - name to which iline prefix will be prefixed to
 669  * output       - pointer to static string with prefixes listed in ascii form
 670  * side effects - NONE
 671  */
 672 char *
 673 show_iline_prefix(struct Client *sptr, struct ConfItem *aconf, char *name)
 674 {
 675         static char prefix_of_host[USERLEN + 15];
 676         char *prefix_ptr;
 677
 678         prefix_ptr = prefix_of_host;
 679         if(IsNoTilde(aconf))
 680                 *prefix_ptr++ = '-';
 681         if(IsNeedIdentd(aconf))
 682                 *prefix_ptr++ = '+';
 683         if(IsConfDoSpoofIp(aconf))
 684                 *prefix_ptr++ = '=';
 685         if(IsOper(sptr) && IsConfExemptFlood(aconf))
 686                 *prefix_ptr++ = '|';
 687         if(IsOper(sptr) && IsConfExemptGline(aconf) && !IsConfExemptKline(aconf))
 688                 *prefix_ptr++ = '_';
 689         if(IsOper(sptr) && IsConfExemptDNSBL(aconf) && !IsConfExemptKline(aconf))
 690                 *prefix_ptr++ = '$';
 691         if(IsOper(sptr) && IsConfExemptKline(aconf))
 692                 *prefix_ptr++ = '^';
 693         if(IsOper(sptr) && IsConfExemptLimits(aconf))
 694                 *prefix_ptr++ = '>';
 695         *prefix_ptr = '\0';
 696         strncpy(prefix_ptr, name, USERLEN);
 697         return (prefix_of_host);
 698 }
 699
 700 /* report_auth()
 701  *
 702  * Inputs: pointer to client to report to
 703  * Output: None
 704  * Side effects: Reports configured auth{} blocks to client_p
 705  */
 706 void
 707 report_auth(struct Client *client_p)
 708 {
 709         char *name, *host, *pass, *user, *classname;
 710         struct AddressRec *arec;
 711         struct ConfItem *aconf;
 712         int i, port;
 713
 714         for (i = 0; i < ATABLE_SIZE; i++)
 715                 for (arec = atable[i]; arec; arec = arec->next)
 716                         if(arec->type == CONF_CLIENT)
 717                         {
 718                                 aconf = arec->aconf;
 719
 720                                 if(!IsOper(client_p) && IsConfDoSpoofIp(aconf))
 721                                         continue;
 722
 723                                 get_printable_conf(aconf, &name, &host, &pass, &user, &port,
 724                                                    &classname);
 725
 726                                 sendto_one_numeric(client_p, RPL_STATSILINE,
 727                                                    form_str(RPL_STATSILINE),
 728                                                    name, show_iline_prefix(client_p, aconf, user),
 729                                                    show_ip_conf(aconf, client_p) ? host : "255.255.255.255",
 730                                                    port, classname);
 731                         }
 732 }
 733
 734 /* report_Klines()
 735  *
 736  * inputs       - Client to report to, mask
 737  * outputs      -
 738  * side effects - Reports configured K-lines to client_p.
 739  */
 740 void
 741 report_Klines(struct Client *source_p)
 742 {
 743         char *host, *pass, *user, *oper_reason;
 744         struct AddressRec *arec;
 745         struct ConfItem *aconf = NULL;
 746         int i;
 747
 748         for (i = 0; i < ATABLE_SIZE; i++)
 749         {
 750                 for (arec = atable[i]; arec; arec = arec->next)
 751                 {
 752                         if(arec->type == CONF_KILL)
 753                         {
 754                                 aconf = arec->aconf;
 755
 756                                 /* its a tempkline, theyre reported elsewhere */
 757                                 if(aconf->flags & CONF_FLAGS_TEMPORARY)
 758                                         continue;
 759
 760                                 get_printable_kline(source_p, aconf, &host, &pass, &user, &oper_reason);
 761                                 sendto_one_numeric(source_p, RPL_STATSKLINE,
 762                                                    form_str(RPL_STATSKLINE),
 763                                                    'K', host, user, pass,
 764                                                    oper_reason ? "|" : "",
 765                                                    oper_reason ? oper_reason : "");
 766                         }
 767                 }
 768         }
 769 }