source3/lib/util_sock.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Tim Potter      2000-2001
   6    Copyright (C) Jeremy Allison  1992-2007
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 /****************************************************************************
  25  Return true if a string could be an IPv4 address.
  26 ****************************************************************************/
  27
  28 bool is_ipaddress_v4(const char *str)
  29 {
  30         int ret = -1;
  31         struct in_addr dest;
  32
  33         ret = inet_pton(AF_INET, str, &dest);
  34         if (ret > 0) {
  35                 return true;
  36         }
  37         return false;
  38 }
  39
  40 /****************************************************************************
  41  Return true if a string could be an IPv4 or IPv6 address.
  42 ****************************************************************************/
  43
  44 bool is_ipaddress(const char *str)
  45 {
  46         int ret = -1;
  47
  48 #if defined(HAVE_IPV6)
  49         if (strchr_m(str, ':')) {
  50                 char addr[INET6_ADDRSTRLEN];
  51                 struct in6_addr dest6;
  52                 const char *sp = str;
  53                 char *p = strchr_m(str, '%');
  54
  55                 /*
  56                  * Cope with link-local.
  57                  * This is IP:v6:addr%ifname.
  58                  */
  59
  60                 if (p && (p > str) && (if_nametoindex(p+1) != 0)) {
  61                         strlcpy(addr, str,
  62                                 MIN(PTR_DIFF(p,str)+1,
  63                                         sizeof(addr)));
  64                         sp = addr;
  65                 }
  66                 ret = inet_pton(AF_INET6, addr, &dest6);
  67                 if (ret > 0) {
  68                         return true;
  69                 }
  70         }
  71 #endif
  72         return is_ipaddress_v4(str);
  73 }
  74
  75 /****************************************************************************
  76  Is a sockaddr_storage a broadcast address ?
  77 ****************************************************************************/
  78
  79 bool is_broadcast_addr(const struct sockaddr_storage *pss)
  80 {
  81 #if defined(HAVE_IPV6)
  82         if (pss->ss_family == AF_INET6) {
  83                 const struct in6_addr *sin6 =
  84                         &((const struct sockaddr_in6 *)pss)->sin6_addr;
  85                 return IN6_IS_ADDR_MULTICAST(sin6);
  86         }
  87 #endif
  88         if (pss->ss_family == AF_INET) {
  89                 uint32_t addr =
  90                 ntohl(((const struct sockaddr_in *)pss)->sin_addr.s_addr);
  91                 return addr == INADDR_BROADCAST;
  92         }
  93         return false;
  94 }
  95
  96 /*******************************************************************
  97  Wrap getaddrinfo...
  98 ******************************************************************/
  99
 100 static bool interpret_string_addr_internal(struct addrinfo **ppres,
 101                                         const char *str, int flags)
 102 {
 103         int ret;
 104         struct addrinfo hints;
 105
 106         memset(&hints, '\0', sizeof(hints));
 107         /* By default make sure it supports TCP. */
 108         hints.ai_socktype = SOCK_STREAM;
 109         hints.ai_flags = flags;
 110
 111         ret = getaddrinfo(str, NULL,
 112                         &hints,
 113                         ppres);
 114         if (ret) {
 115                 DEBUG(3,("interpret_string_addr_interal: getaddrinfo failed "
 116                         "for name %s [%s]\n",
 117                         str,
 118                         gai_strerror(ret) ));
 119                 return false;
 120         }
 121         return true;
 122 }
 123
 124 /****************************************************************************
 125  Interpret an internet address or name into an IP address in 4 byte form.
 126  RETURNS IN NETWORK BYTE ORDER (big endian).
 127 ****************************************************************************/
 128
 129 uint32 interpret_addr(const char *str)
 130 {
 131         uint32 ret;
 132
 133         /* If it's in the form of an IP address then
 134          * get the lib to interpret it */
 135         if (is_ipaddress_v4(str)) {
 136                 struct in_addr dest;
 137
 138                 if (inet_pton(AF_INET, str, &dest) <= 0) {
 139                         /* Error - this shouldn't happen ! */
 140                         DEBUG(0,("interpret_addr: inet_pton failed "
 141                                 "host %s\n",
 142                                 str));
 143                         return 0;
 144                 }
 145                 ret = dest.s_addr; /* NETWORK BYTE ORDER ! */
 146         } else {
 147                 /* Otherwise assume it's a network name of some sort and use
 148                         getadddrinfo. */
 149                 struct addrinfo *res = NULL;
 150                 struct addrinfo *res_list = NULL;
 151                 if (!interpret_string_addr_internal(&res_list,
 152                                         str,
 153                                         AI_ADDRCONFIG)) {
 154                         DEBUG(3,("interpret_addr: Unknown host. %s\n",str));
 155                         return 0;
 156                 }
 157
 158                 /* Find the first IPv4 address. */
 159                 for (res = res_list; res; res = res->ai_next) {
 160                         if (res->ai_family != AF_INET) {
 161                                 continue;
 162                         }
 163                         if (res->ai_addr == NULL) {
 164                                 continue;
 165                         }
 166                         break;
 167                 }
 168                 if(res == NULL) {
 169                         DEBUG(3,("interpret_addr: host address is "
 170                                 "invalid for host %s\n",str));
 171                         if (res_list) {
 172                                 freeaddrinfo(res_list);
 173                         }
 174                         return 0;
 175                 }
 176                 putip((char *)&ret,
 177                         &((struct sockaddr_in *)res->ai_addr)->sin_addr.s_addr);
 178                 if (res_list) {
 179                         freeaddrinfo(res_list);
 180                 }
 181         }
 182
 183         /* This is so bogus - all callers need fixing... JRA. */
 184         if (ret == (uint32)-1) {
 185                 return 0;
 186         }
 187
 188         return ret;
 189 }
 190
 191 /*******************************************************************
 192  A convenient addition to interpret_addr().
 193 ******************************************************************/
 194
 195 struct in_addr *interpret_addr2(struct in_addr *ip, const char *str)
 196 {
 197         uint32 a = interpret_addr(str);
 198         ip->s_addr = a;
 199         return ip;
 200 }
 201
 202 /*******************************************************************
 203  Map a text hostname or IP address (IPv4 or IPv6) into a
 204  struct sockaddr_storage.
 205 ******************************************************************/
 206
 207 bool interpret_string_addr(struct sockaddr_storage *pss,
 208                 const char *str,
 209                 int flags)
 210 {
 211         char addr[INET6_ADDRSTRLEN];
 212         struct addrinfo *res = NULL;
 213 #if defined(HAVE_IPV6)
 214         unsigned int scope_id = 0;
 215
 216         if (strchr_m(str, ':')) {
 217                 char *p = strchr_m(str, '%');
 218
 219                 /*
 220                  * Cope with link-local.
 221                  * This is IP:v6:addr%ifname.
 222                  */
 223
 224                 if (p && (p > str) && ((scope_id = if_nametoindex(p+1)) != 0)) {
 225                         strlcpy(addr, str,
 226                                 MIN(PTR_DIFF(p,str)+1,
 227                                         sizeof(addr)));
 228                         str = addr;
 229                 }
 230         }
 231 #endif
 232
 233         zero_addr(pss);
 234
 235         if (!interpret_string_addr_internal(&res, str, flags|AI_ADDRCONFIG)) {
 236                 return false;
 237         }
 238         if (!res) {
 239                 return false;
 240         }
 241         /* Copy the first sockaddr. */
 242         memcpy(pss, res->ai_addr, res->ai_addrlen);
 243
 244 #if defined(HAVE_IPV6)
 245         if (pss->ss_family == AF_INET6 && scope_id) {
 246                 struct sockaddr_in6 *ps6 = (struct sockaddr_in6 *)pss;
 247                 if (IN6_IS_ADDR_LINKLOCAL(&ps6->sin6_addr) &&
 248                                 ps6->sin6_scope_id == 0) {
 249                         ps6->sin6_scope_id = scope_id;
 250                 }
 251         }
 252 #endif
 253
 254         freeaddrinfo(res);
 255         return true;
 256 }
 257
 258 /*******************************************************************
 259  Check if an IPv7 is 127.0.0.1
 260 ******************************************************************/
 261
 262 bool is_loopback_ip_v4(struct in_addr ip)
 263 {
 264         struct in_addr a;
 265         a.s_addr = htonl(INADDR_LOOPBACK);
 266         return(ip.s_addr == a.s_addr);
 267 }
 268
 269 /*******************************************************************
 270  Check if a struct sockaddr_storage is the loopback address.
 271 ******************************************************************/
 272
 273 bool is_loopback_addr(const struct sockaddr_storage *pss)
 274 {
 275 #if defined(HAVE_IPV6)
 276         if (pss->ss_family == AF_INET6) {
 277                 struct in6_addr *pin6 =
 278                         &((struct sockaddr_in6 *)pss)->sin6_addr;
 279                 return IN6_IS_ADDR_LOOPBACK(pin6);
 280         }
 281 #endif
 282         if (pss->ss_family == AF_INET) {
 283                 struct in_addr *pin = &((struct sockaddr_in *)pss)->sin_addr;
 284                 return is_loopback_ip_v4(*pin);
 285         }
 286         return false;
 287 }
 288
 289 /*******************************************************************
 290  Check if an IPv4 is 0.0.0.0.
 291 ******************************************************************/
 292
 293 bool is_zero_ip_v4(struct in_addr ip)
 294 {
 295         uint32 a;
 296         putip((char *)&a,(char *)&ip);
 297         return(a == 0);
 298 }
 299
 300 /*******************************************************************
 301  Check if a struct sockaddr_storage has an unspecified address.
 302 ******************************************************************/
 303
 304 bool is_zero_addr(const struct sockaddr_storage *pss)
 305 {
 306 #if defined(HAVE_IPV6)
 307         if (pss->ss_family == AF_INET6) {
 308                 struct in6_addr *pin6 =
 309                         &((struct sockaddr_in6 *)pss)->sin6_addr;
 310                 return IN6_IS_ADDR_UNSPECIFIED(pin6);
 311         }
 312 #endif
 313         if (pss->ss_family == AF_INET) {
 314                 struct in_addr *pin = &((struct sockaddr_in *)pss)->sin_addr;
 315                 return is_zero_ip_v4(*pin);
 316         }
 317         return false;
 318 }
 319
 320 /*******************************************************************
 321  Set an IP to 0.0.0.0.
 322 ******************************************************************/
 323
 324 void zero_ip_v4(struct in_addr *ip)
 325 {
 326         memset(ip, '\0', sizeof(struct in_addr));
 327 }
 328
 329 /*******************************************************************
 330  Set an address to INADDR_ANY.
 331 ******************************************************************/
 332
 333 void zero_addr(struct sockaddr_storage *pss)
 334 {
 335         memset(pss, '\0', sizeof(*pss));
 336         /* Ensure we're at least a valid sockaddr-storage. */
 337         pss->ss_family = AF_INET;
 338 }
 339
 340 /*******************************************************************
 341  Are two IPs on the same subnet - IPv4 version ?
 342 ********************************************************************/
 343
 344 bool same_net_v4(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
 345 {
 346         uint32 net1,net2,nmask;
 347
 348         nmask = ntohl(mask.s_addr);
 349         net1  = ntohl(ip1.s_addr);
 350         net2  = ntohl(ip2.s_addr);
 351
 352         return((net1 & nmask) == (net2 & nmask));
 353 }
 354
 355 /*******************************************************************
 356  Convert an IPv4 struct in_addr to a struct sockaddr_storage.
 357 ********************************************************************/
 358
 359 void in_addr_to_sockaddr_storage(struct sockaddr_storage *ss,
 360                 struct in_addr ip)
 361 {
 362         struct sockaddr_in *sa = (struct sockaddr_in *)ss;
 363         memset(ss, '\0', sizeof(*ss));
 364         ss->ss_family = AF_INET;
 365         sa->sin_addr = ip;
 366 }
 367
 368 #if defined(HAVE_IPV6)
 369 /*******************************************************************
 370  Convert an IPv6 struct in_addr to a struct sockaddr_storage.
 371 ********************************************************************/
 372
 373 void in6_addr_to_sockaddr_storage(struct sockaddr_storage *ss,
 374                 struct in6_addr ip)
 375 {
 376         struct sockaddr_in6 *sa = (struct sockaddr_in6 *)ss;
 377         memset(ss, '\0', sizeof(*ss));
 378         ss->ss_family = AF_INET6;
 379         sa->sin6_addr = ip;
 380 }
 381 #endif
 382
 383 /*******************************************************************
 384  Are two IPs on the same subnet?
 385 ********************************************************************/
 386
 387 bool same_net(const struct sockaddr_storage *ip1,
 388                 const struct sockaddr_storage *ip2,
 389                 const struct sockaddr_storage *mask)
 390 {
 391         if (ip1->ss_family != ip2->ss_family) {
 392                 /* Never on the same net. */
 393                 return false;
 394         }
 395
 396 #if defined(HAVE_IPV6)
 397         if (ip1->ss_family == AF_INET6) {
 398                 struct sockaddr_in6 ip1_6 = *(struct sockaddr_in6 *)ip1;
 399                 struct sockaddr_in6 ip2_6 = *(struct sockaddr_in6 *)ip2;
 400                 struct sockaddr_in6 mask_6 = *(struct sockaddr_in6 *)mask;
 401                 char *p1 = (char *)&ip1_6.sin6_addr;
 402                 char *p2 = (char *)&ip2_6.sin6_addr;
 403                 char *m = (char *)&mask_6.sin6_addr;
 404                 int i;
 405
 406                 for (i = 0; i < sizeof(struct in6_addr); i++) {
 407                         *p1++ &= *m;
 408                         *p2++ &= *m;
 409                         m++;
 410                 }
 411                 return (memcmp(&ip1_6.sin6_addr,
 412                                 &ip2_6.sin6_addr,
 413                                 sizeof(struct in6_addr)) == 0);
 414         }
 415 #endif
 416         if (ip1->ss_family == AF_INET) {
 417                 return same_net_v4(((const struct sockaddr_in *)ip1)->sin_addr,
 418                                 ((const struct sockaddr_in *)ip2)->sin_addr,
 419                                 ((const struct sockaddr_in *)mask)->sin_addr);
 420         }
 421         return false;
 422 }
 423
 424 /*******************************************************************
 425  Are two sockaddr_storage's the same family and address ? Ignore port etc.
 426 ********************************************************************/
 427
 428 bool addr_equal(const struct sockaddr_storage *ip1,
 429                 const struct sockaddr_storage *ip2)
 430 {
 431         if (ip1->ss_family != ip2->ss_family) {
 432                 /* Never the same. */
 433                 return false;
 434         }
 435
 436 #if defined(HAVE_IPV6)
 437         if (ip1->ss_family == AF_INET6) {
 438                 return (memcmp(&((const struct sockaddr_in6 *)ip1)->sin6_addr,
 439                                 &((const struct sockaddr_in6 *)ip2)->sin6_addr,
 440                                 sizeof(struct in6_addr)) == 0);
 441         }
 442 #endif
 443         if (ip1->ss_family == AF_INET) {
 444                 return (memcmp(&((const struct sockaddr_in *)ip1)->sin_addr,
 445                                 &((const struct sockaddr_in *)ip2)->sin_addr,
 446                                 sizeof(struct in_addr)) == 0);
 447         }
 448         return false;
 449 }
 450
 451 /****************************************************************************
 452  Is an IP address the INADDR_ANY or in6addr_any value ?
 453 ****************************************************************************/
 454
 455 bool is_address_any(const struct sockaddr_storage *psa)
 456 {
 457 #if defined(HAVE_IPV6)
 458         if (psa->ss_family == AF_INET6) {
 459                 struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)psa;
 460                 if (memcmp(&in6addr_any,
 461                                 &si6->sin6_addr,
 462                                 sizeof(in6addr_any)) == 0) {
 463                         return true;
 464                 }
 465                 return false;
 466         }
 467 #endif
 468         if (psa->ss_family == AF_INET) {
 469                 struct sockaddr_in *si = (struct sockaddr_in *)psa;
 470                 if (si->sin_addr.s_addr == INADDR_ANY) {
 471                         return true;
 472                 }
 473                 return false;
 474         }
 475         return false;
 476 }
 477
 478 /****************************************************************************
 479  Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
 480 ****************************************************************************/
 481
 482 static char *print_sockaddr_len(char *dest,
 483                         size_t destlen,
 484                         const struct sockaddr_storage *psa,
 485                         socklen_t psalen)
 486 {
 487         if (destlen > 0) {
 488                 dest[0] = '\0';
 489         }
 490         (void)sys_getnameinfo((const struct sockaddr *)psa,
 491                         psalen,
 492                         dest, destlen,
 493                         NULL, 0,
 494                         NI_NUMERICHOST);
 495         return dest;
 496 }
 497
 498 /****************************************************************************
 499  Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
 500 ****************************************************************************/
 501
 502 char *print_sockaddr(char *dest,
 503                         size_t destlen,
 504                         const struct sockaddr_storage *psa)
 505 {
 506         return print_sockaddr_len(dest, destlen, psa,
 507                         sizeof(struct sockaddr_storage));
 508 }
 509
 510 /****************************************************************************
 511  Print out a canonical IPv4 or IPv6 address from a struct sockaddr_storage.
 512 ****************************************************************************/
 513
 514 char *print_canonical_sockaddr(TALLOC_CTX *ctx,
 515                         const struct sockaddr_storage *pss)
 516 {
 517         char addr[INET6_ADDRSTRLEN];
 518         char *dest = NULL;
 519         int ret;
 520
 521         ret = getnameinfo((const struct sockaddr *)pss,
 522                         sizeof(struct sockaddr_storage),
 523                         addr, sizeof(addr),
 524                         NULL, 0,
 525                         NI_NUMERICHOST);
 526         if (ret) {
 527                 return NULL;
 528         }
 529         if (pss->ss_family != AF_INET) {
 530 #if defined(HAVE_IPV6)
 531                 /* IPv6 */
 532                 const struct sockaddr_in6 *sa6 =
 533                         (const struct sockaddr_in6 *)pss;
 534                 uint16_t port = ntohs(sa6->sin6_port);
 535
 536                 if (port) {
 537                         dest = talloc_asprintf(ctx,
 538                                         "[%s]:%d",
 539                                         addr,
 540                                         (unsigned int)port);
 541                 } else {
 542                         dest = talloc_asprintf(ctx,
 543                                         "[%s]",
 544                                         addr);
 545                 }
 546 #else
 547                 return NULL;
 548 #endif
 549         } else {
 550                 const struct sockaddr_in *sa =
 551                         (const struct sockaddr_in *)pss;
 552                 uint16_t port = ntohs(sa->sin_port);
 553
 554                 if (port) {
 555                         dest = talloc_asprintf(ctx,
 556                                         "%s:%d",
 557                                         addr,
 558                                         (unsigned int)port);
 559                 } else {
 560                         dest = talloc_asprintf(ctx,
 561                                         "%s",
 562                                         addr);
 563                 }
 564         }
 565         return dest;
 566 }
 567
 568 /****************************************************************************
 569  Return the string of an IP address (IPv4 or IPv6).
 570 ****************************************************************************/
 571
 572 static const char *get_socket_addr(int fd, char *addr_buf, size_t addr_len)
 573 {
 574         struct sockaddr_storage sa;
 575         socklen_t length = sizeof(sa);
 576
 577         /* Ok, returning a hard coded IPv4 address
 578          * is bogus, but it's just as bogus as a
 579          * zero IPv6 address. No good choice here.
 580          */
 581
 582         strlcpy(addr_buf, "0.0.0.0", addr_len);
 583
 584         if (fd == -1) {
 585                 return addr_buf;
 586         }
 587
 588         if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
 589                 DEBUG(0,("getsockname failed. Error was %s\n",
 590                         strerror(errno) ));
 591                 return addr_buf;
 592         }
 593
 594         return print_sockaddr_len(addr_buf, addr_len, &sa, length);
 595 }
 596
 597 #if 0
 598 /* Not currently used. JRA. */
 599 /****************************************************************************
 600  Return the port number we've bound to on a socket.
 601 ****************************************************************************/
 602
 603 static int get_socket_port(int fd)
 604 {
 605         struct sockaddr_storage sa;
 606         socklen_t length = sizeof(sa);
 607
 608         if (fd == -1) {
 609                 return -1;
 610         }
 611
 612         if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
 613                 DEBUG(0,("getpeername failed. Error was %s\n",
 614                         strerror(errno) ));
 615                 return -1;
 616         }
 617
 618 #if defined(HAVE_IPV6)
 619         if (sa.ss_family == AF_INET6) {
 620                 return ntohs(((struct sockaddr_in6 *)&sa)->sin6_port);
 621         }
 622 #endif
 623         if (sa.ss_family == AF_INET) {
 624                 return ntohs(((struct sockaddr_in *)&sa)->sin_port);
 625         }
 626         return -1;
 627 }
 628 #endif
 629
 630 void set_sockaddr_port(struct sockaddr_storage *psa, uint16 port)
 631 {
 632 #if defined(HAVE_IPV6)
 633         if (psa->ss_family == AF_INET6) {
 634                 ((struct sockaddr_in6 *)psa)->sin6_port = htons(port);
 635         }
 636 #endif
 637         if (psa->ss_family == AF_INET) {
 638                 ((struct sockaddr_in *)psa)->sin_port = htons(port);
 639         }
 640 }
 641
 642 const char *client_name(int fd)
 643 {
 644         return get_peer_name(fd,false);
 645 }
 646
 647 const char *client_addr(int fd, char *addr, size_t addrlen)
 648 {
 649         return get_peer_addr(fd,addr,addrlen);
 650 }
 651
 652 const char *client_socket_addr(int fd, char *addr, size_t addr_len)
 653 {
 654         return get_socket_addr(fd, addr, addr_len);
 655 }
 656
 657 #if 0
 658 /* Not currently used. JRA. */
 659 int client_socket_port(int fd)
 660 {
 661         return get_socket_port(fd);
 662 }
 663 #endif
 664
 665 /****************************************************************************
 666  Accessor functions to make thread-safe code easier later...
 667 ****************************************************************************/
 668
 669 void set_smb_read_error(enum smb_read_errors *pre,
 670                         enum smb_read_errors newerr)
 671 {
 672         if (pre) {
 673                 *pre = newerr;
 674         }
 675 }
 676
 677 void cond_set_smb_read_error(enum smb_read_errors *pre,
 678                         enum smb_read_errors newerr)
 679 {
 680         if (pre && *pre == SMB_READ_OK) {
 681                 *pre = newerr;
 682         }
 683 }
 684
 685 /****************************************************************************
 686  Determine if a file descriptor is in fact a socket.
 687 ****************************************************************************/
 688
 689 bool is_a_socket(int fd)
 690 {
 691         int v;
 692         socklen_t l;
 693         l = sizeof(int);
 694         return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0);
 695 }
 696
 697 enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON};
 698
 699 typedef struct smb_socket_option {
 700         const char *name;
 701         int level;
 702         int option;
 703         int value;
 704         int opttype;
 705 } smb_socket_option;
 706
 707 static const smb_socket_option socket_options[] = {
 708   {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},
 709   {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL},
 710   {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL},
 711 #ifdef TCP_NODELAY
 712   {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL},
 713 #endif
 714 #ifdef TCP_KEEPCNT
 715   {"TCP_KEEPCNT", IPPROTO_TCP, TCP_KEEPCNT, 0, OPT_INT},
 716 #endif
 717 #ifdef TCP_KEEPIDLE
 718   {"TCP_KEEPIDLE", IPPROTO_TCP, TCP_KEEPIDLE, 0, OPT_INT},
 719 #endif
 720 #ifdef TCP_KEEPINTVL
 721   {"TCP_KEEPINTVL", IPPROTO_TCP, TCP_KEEPINTVL, 0, OPT_INT},
 722 #endif
 723 #ifdef IPTOS_LOWDELAY
 724   {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
 725 #endif
 726 #ifdef IPTOS_THROUGHPUT
 727   {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
 728 #endif
 729 #ifdef SO_REUSEPORT
 730   {"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
 731 #endif
 732 #ifdef SO_SNDBUF
 733   {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
 734 #endif
 735 #ifdef SO_RCVBUF
 736   {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
 737 #endif
 738 #ifdef SO_SNDLOWAT
 739   {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
 740 #endif
 741 #ifdef SO_RCVLOWAT
 742   {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
 743 #endif
 744 #ifdef SO_SNDTIMEO
 745   {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
 746 #endif
 747 #ifdef SO_RCVTIMEO
 748   {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
 749 #endif
 750 #ifdef TCP_FASTACK
 751   {"TCP_FASTACK", IPPROTO_TCP, TCP_FASTACK, 0, OPT_INT},
 752 #endif
 753   {NULL,0,0,0,0}};
 754
 755 /****************************************************************************
 756  Print socket options.
 757 ****************************************************************************/
 758
 759 static void print_socket_options(int s)
 760 {
 761         int value;
 762         socklen_t vlen = 4;
 763         const smb_socket_option *p = &socket_options[0];
 764
 765         /* wrapped in if statement to prevent streams
 766          * leak in SCO Openserver 5.0 */
 767         /* reported on samba-technical  --jerry */
 768         if ( DEBUGLEVEL >= 5 ) {
 769                 for (; p->name != NULL; p++) {
 770                         if (getsockopt(s, p->level, p->option,
 771                                                 (void *)&value, &vlen) == -1) {
 772                                 DEBUG(5,("Could not test socket option %s.\n",
 773                                                         p->name));
 774                         } else {
 775                                 DEBUG(5,("socket option %s = %d\n",
 776                                                         p->name,value));
 777                         }
 778                 }
 779         }
 780  }
 781
 782 /****************************************************************************
 783  Set user socket options.
 784 ****************************************************************************/
 785
 786 void set_socket_options(int fd, const char *options)
 787 {
 788         fstring tok;
 789
 790         while (next_token(&options,tok," \t,", sizeof(tok))) {
 791                 int ret=0,i;
 792                 int value = 1;
 793                 char *p;
 794                 bool got_value = false;
 795
 796                 if ((p = strchr_m(tok,'='))) {
 797                         *p = 0;
 798                         value = atoi(p+1);
 799                         got_value = true;
 800                 }
 801
 802                 for (i=0;socket_options[i].name;i++)
 803                         if (strequal(socket_options[i].name,tok))
 804                                 break;
 805
 806                 if (!socket_options[i].name) {
 807                         DEBUG(0,("Unknown socket option %s\n",tok));
 808                         continue;
 809                 }
 810
 811                 switch (socket_options[i].opttype) {
 812                 case OPT_BOOL:
 813                 case OPT_INT:
 814                         ret = setsockopt(fd,socket_options[i].level,
 815                                         socket_options[i].option,
 816                                         (char *)&value,sizeof(int));
 817                         break;
 818
 819                 case OPT_ON:
 820                         if (got_value)
 821                                 DEBUG(0,("syntax error - %s "
 822                                         "does not take a value\n",tok));
 823
 824                         {
 825                                 int on = socket_options[i].value;
 826                                 ret = setsockopt(fd,socket_options[i].level,
 827                                         socket_options[i].option,
 828                                         (char *)&on,sizeof(int));
 829                         }
 830                         break;
 831                 }
 832
 833                 if (ret != 0) {
 834                         DEBUG(0,("Failed to set socket option %s (Error %s)\n",
 835                                 tok, strerror(errno) ));
 836                 }
 837         }
 838
 839         print_socket_options(fd);
 840 }
 841
 842 /****************************************************************************
 843  Read from a socket.
 844 ****************************************************************************/
 845
 846 ssize_t read_udp_v4_socket(int fd,
 847                         char *buf,
 848                         size_t len,
 849                         struct sockaddr_storage *psa)
 850 {
 851         ssize_t ret;
 852         socklen_t socklen = sizeof(*psa);
 853         struct sockaddr_in *si = (struct sockaddr_in *)psa;
 854
 855         memset((char *)psa,'\0',socklen);
 856
 857         ret = (ssize_t)sys_recvfrom(fd,buf,len,0,
 858                         (struct sockaddr *)psa,&socklen);
 859         if (ret <= 0) {
 860                 /* Don't print a low debug error for a non-blocking socket. */
 861                 if (errno == EAGAIN) {
 862                         DEBUG(10,("read_udp_v4_socket: returned EAGAIN\n"));
 863                 } else {
 864                         DEBUG(2,("read_udp_v4_socket: failed. errno=%s\n",
 865                                 strerror(errno)));
 866                 }
 867                 return 0;
 868         }
 869
 870         if (psa->ss_family != AF_INET) {
 871                 DEBUG(2,("read_udp_v4_socket: invalid address family %d "
 872                         "(not IPv4)\n", (int)psa->ss_family));
 873                 return 0;
 874         }
 875
 876         DEBUG(10,("read_udp_v4_socket: ip %s port %d read: %lu\n",
 877                         inet_ntoa(si->sin_addr),
 878                         si->sin_port,
 879                         (unsigned long)ret));
 880
 881         return ret;
 882 }
 883
 884 /****************************************************************************
 885  Read data from a socket with a timout in msec.
 886  mincount = if timeout, minimum to read before returning
 887  maxcount = number to be read.
 888  time_out = timeout in milliseconds
 889 ****************************************************************************/
 890
 891 ssize_t read_socket_with_timeout(int fd,
 892                                 char *buf,
 893                                 size_t mincnt,
 894                                 size_t maxcnt,
 895                                 unsigned int time_out,
 896                                 enum smb_read_errors *pre)
 897 {
 898         fd_set fds;
 899         int selrtn;
 900         ssize_t readret;
 901         size_t nread = 0;
 902         struct timeval timeout;
 903         char addr[INET6_ADDRSTRLEN];
 904
 905         /* just checking .... */
 906         if (maxcnt <= 0)
 907                 return(0);
 908
 909         set_smb_read_error(pre,SMB_READ_OK);
 910
 911         /* Blocking read */
 912         if (time_out == 0) {
 913                 if (mincnt == 0) {
 914                         mincnt = maxcnt;
 915                 }
 916
 917                 while (nread < mincnt) {
 918                         readret = sys_read(fd, buf + nread, maxcnt - nread);
 919
 920                         if (readret == 0) {
 921                                 DEBUG(5,("read_socket_with_timeout: "
 922                                         "blocking read. EOF from client.\n"));
 923                                 set_smb_read_error(pre,SMB_READ_EOF);
 924                                 return -1;
 925                         }
 926
 927                         if (readret == -1) {
 928                                 if (fd == get_client_fd()) {
 929                                         /* Try and give an error message
 930                                          * saying what client failed. */
 931                                         DEBUG(0,("read_socket_with_timeout: "
 932                                                 "client %s read error = %s.\n",
 933                                                 get_peer_addr(fd,addr,sizeof(addr)),
 934                                                 strerror(errno) ));
 935                                 } else {
 936                                         DEBUG(0,("read_socket_with_timeout: "
 937                                                 "read error = %s.\n",
 938                                                 strerror(errno) ));
 939                                 }
 940                                 set_smb_read_error(pre,SMB_READ_ERROR);
 941                                 return -1;
 942                         }
 943                         nread += readret;
 944                 }
 945                 return((ssize_t)nread);
 946         }
 947
 948         /* Most difficult - timeout read */
 949         /* If this is ever called on a disk file and
 950            mincnt is greater then the filesize then
 951            system performance will suffer severely as
 952            select always returns true on disk files */
 953
 954         /* Set initial timeout */
 955         timeout.tv_sec = (time_t)(time_out / 1000);
 956         timeout.tv_usec = (long)(1000 * (time_out % 1000));
 957
 958         for (nread=0; nread < mincnt; ) {
 959                 FD_ZERO(&fds);
 960                 FD_SET(fd,&fds);
 961
 962                 selrtn = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout);
 963
 964                 /* Check if error */
 965                 if (selrtn == -1) {
 966                         /* something is wrong. Maybe the socket is dead? */
 967                         if (fd == get_client_fd()) {
 968                                 /* Try and give an error message saying
 969                                  * what client failed. */
 970                                 DEBUG(0,("read_socket_with_timeout: timeout "
 971                                 "read for client %s. select error = %s.\n",
 972                                 get_peer_addr(fd,addr,sizeof(addr)),
 973                                 strerror(errno) ));
 974                         } else {
 975                                 DEBUG(0,("read_socket_with_timeout: timeout "
 976                                 "read. select error = %s.\n",
 977                                 strerror(errno) ));
 978                         }
 979                         set_smb_read_error(pre,SMB_READ_ERROR);
 980                         return -1;
 981                 }
 982
 983                 /* Did we timeout ? */
 984                 if (selrtn == 0) {
 985                         DEBUG(10,("read_socket_with_timeout: timeout read. "
 986                                 "select timed out.\n"));
 987                         set_smb_read_error(pre,SMB_READ_TIMEOUT);
 988                         return -1;
 989                 }
 990
 991                 readret = sys_read(fd, buf+nread, maxcnt-nread);
 992
 993                 if (readret == 0) {
 994                         /* we got EOF on the file descriptor */
 995                         DEBUG(5,("read_socket_with_timeout: timeout read. "
 996                                 "EOF from client.\n"));
 997                         set_smb_read_error(pre,SMB_READ_EOF);
 998                         return -1;
 999                 }
1000
1001                 if (readret == -1) {
1002                         /* the descriptor is probably dead */
1003                         if (fd == get_client_fd()) {
1004                                 /* Try and give an error message
1005                                  * saying what client failed. */
1006                                 DEBUG(0,("read_socket_with_timeout: timeout "
1007                                         "read to client %s. read error = %s.\n",
1008                                         get_peer_addr(fd,addr,sizeof(addr)),
1009                                         strerror(errno) ));
1010                         } else {
1011                                 DEBUG(0,("read_socket_with_timeout: timeout "
1012                                         "read. read error = %s.\n",
1013                                         strerror(errno) ));
1014                         }
1015                         set_smb_read_error(pre,SMB_READ_ERROR);
1016                         return -1;
1017                 }
1018
1019                 nread += readret;
1020         }
1021
1022         /* Return the number we got */
1023         return (ssize_t)nread;
1024 }
1025
1026 /****************************************************************************
1027  Read data from the client, reading exactly N bytes.
1028 ****************************************************************************/
1029
1030 ssize_t read_data(int fd,char *buffer,size_t N, enum smb_read_errors *pre)
1031 {
1032         ssize_t ret;
1033         size_t total=0;
1034         char addr[INET6_ADDRSTRLEN];
1035
1036         set_smb_read_error(pre,SMB_READ_OK);
1037
1038         while (total < N) {
1039                 ret = sys_read(fd,buffer + total,N - total);
1040
1041                 if (ret == 0) {
1042                         DEBUG(10,("read_data: read of %d returned 0. "
1043                                 "Error = %s\n",
1044                                 (int)(N - total), strerror(errno) ));
1045                         set_smb_read_error(pre,SMB_READ_EOF);
1046                         return 0;
1047                 }
1048
1049                 if (ret == -1) {
1050                         if (fd == get_client_fd()) {
1051                                 /* Try and give an error message saying
1052                                  * what client failed. */
1053                                 DEBUG(0,("read_data: read failure for %d "
1054                                         "bytes to client %s. Error = %s\n",
1055                                         (int)(N - total),
1056                                         get_peer_addr(fd,addr,sizeof(addr)),
1057                                         strerror(errno) ));
1058                         } else {
1059                                 DEBUG(0,("read_data: read failure for %d. "
1060                                         "Error = %s\n",
1061                                         (int)(N - total),
1062                                         strerror(errno) ));
1063                         }
1064                         set_smb_read_error(pre,SMB_READ_ERROR);
1065                         return -1;
1066                 }
1067                 total += ret;
1068         }
1069         return (ssize_t)total;
1070 }
1071
1072 /****************************************************************************
1073  Write data to a fd.
1074 ****************************************************************************/
1075
1076 ssize_t write_data(int fd, const char *buffer, size_t N)
1077 {
1078         size_t total=0;
1079         ssize_t ret;
1080         char addr[INET6_ADDRSTRLEN];
1081
1082         while (total < N) {
1083                 ret = sys_write(fd,buffer + total,N - total);
1084
1085                 if (ret == -1) {
1086                         if (fd == get_client_fd()) {
1087                                 /* Try and give an error message saying
1088                                  * what client failed. */
1089                                 DEBUG(0,("write_data: write failure in "
1090                                         "writing to client %s. Error %s\n",
1091                                         get_peer_addr(fd,addr,sizeof(addr)),
1092                                         strerror(errno) ));
1093                         } else {
1094                                 DEBUG(0,("write_data: write failure. "
1095                                         "Error = %s\n", strerror(errno) ));
1096                         }
1097                         return -1;
1098                 }
1099
1100                 if (ret == 0) {
1101                         return total;
1102                 }
1103
1104                 total += ret;
1105         }
1106         return (ssize_t)total;
1107 }
1108
1109 /****************************************************************************
1110  Send a keepalive packet (rfc1002).
1111 ****************************************************************************/
1112
1113 bool send_keepalive(int client)
1114 {
1115         unsigned char buf[4];
1116
1117         buf[0] = SMBkeepalive;
1118         buf[1] = buf[2] = buf[3] = 0;
1119
1120         return(write_data(client,(char *)buf,4) == 4);
1121 }
1122
1123 /****************************************************************************
1124  Read 4 bytes of a smb packet and return the smb length of the packet.
1125  Store the result in the buffer.
1126  This version of the function will return a length of zero on receiving
1127  a keepalive packet.
1128  Timeout is in milliseconds.
1129 ****************************************************************************/
1130
1131 ssize_t read_smb_length_return_keepalive(int fd,
1132                                         char *inbuf,
1133                                         unsigned int timeout,
1134                                         enum smb_read_errors *pre)
1135 {
1136         ssize_t len=0;
1137         int msg_type;
1138         bool ok = false;
1139
1140         while (!ok) {
1141                 if (timeout > 0) {
1142                         ok = (read_socket_with_timeout(fd,inbuf,4,4,
1143                                                 timeout,pre) == 4);
1144                 } else {
1145                         ok = (read_data(fd,inbuf,4,pre) == 4);
1146                 }
1147                 if (!ok) {
1148                         return -1;
1149                 }
1150
1151                 len = smb_len(inbuf);
1152                 msg_type = CVAL(inbuf,0);
1153
1154                 if (msg_type == SMBkeepalive) {
1155                         DEBUG(5,("Got keepalive packet\n"));
1156                 }
1157         }
1158
1159         DEBUG(10,("got smb length of %lu\n",(unsigned long)len));
1160
1161         return len;
1162 }
1163
1164 /****************************************************************************
1165  Read 4 bytes of a smb packet and return the smb length of the packet.
1166  Store the result in the buffer. This version of the function will
1167  never return a session keepalive (length of zero).
1168  Timeout is in milliseconds.
1169 ****************************************************************************/
1170
1171 ssize_t read_smb_length(int fd, char *inbuf, unsigned int timeout, enum smb_read_errors *pre)
1172 {
1173         ssize_t len;
1174
1175         for(;;) {
1176                 len = read_smb_length_return_keepalive(fd, inbuf, timeout, pre);
1177
1178                 if(len < 0)
1179                         return len;
1180
1181                 /* Ignore session keepalives. */
1182                 if(CVAL(inbuf,0) != SMBkeepalive)
1183                         break;
1184         }
1185
1186         DEBUG(10,("read_smb_length: got smb length of %lu\n",
1187                   (unsigned long)len));
1188
1189         return len;
1190 }
1191
1192 /****************************************************************************
1193  Read an smb from a fd. Note that the buffer *MUST* be of size
1194  BUFFER_SIZE+SAFETY_MARGIN.
1195  The timeout is in milliseconds.
1196  This function will return on receipt of a session keepalive packet.
1197  maxlen is the max number of bytes to return, not including the 4 byte
1198  length. If zero it means BUFFER_SIZE+SAFETY_MARGIN limit.
1199  Doesn't check the MAC on signed packets.
1200 ****************************************************************************/
1201
1202 ssize_t receive_smb_raw(int fd,
1203                         char *buffer,
1204                         unsigned int timeout,
1205                         size_t maxlen,
1206                         enum smb_read_errors *pre)
1207 {
1208         ssize_t len,ret;
1209
1210         set_smb_read_error(pre,SMB_READ_OK);
1211
1212         len = read_smb_length_return_keepalive(fd,buffer,timeout,pre);
1213         if (len < 0) {
1214                 DEBUG(10,("receive_smb_raw: length < 0!\n"));
1215
1216                 /*
1217                  * Correct fix. smb_read_error may have already been
1218                  * set. Only set it here if not already set. Global
1219                  * variables still suck :-). JRA.
1220                  */
1221
1222                 cond_set_smb_read_error(pre,SMB_READ_ERROR);
1223                 return -1;
1224         }
1225
1226         /*
1227          * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
1228          * of header. Don't print the error if this fits.... JRA.
1229          */
1230
1231         if (len > (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) {
1232                 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
1233                                         (unsigned long)len));
1234                 if (len > BUFFER_SIZE + (SAFETY_MARGIN/2)) {
1235
1236                         /*
1237                          * Correct fix. smb_read_error may have already been
1238                          * set. Only set it here if not already set. Global
1239                          * variables still suck :-). JRA.
1240                          */
1241
1242                         cond_set_smb_read_error(pre,SMB_READ_ERROR);
1243                         return -1;
1244                 }
1245         }
1246
1247         if(len > 0) {
1248                 if (maxlen) {
1249                         len = MIN(len,maxlen);
1250                 }
1251
1252                 if (timeout > 0) {
1253                         ret = read_socket_with_timeout(fd,
1254                                         buffer+4,
1255                                         len,
1256                                         len,
1257                                         timeout,
1258                                         pre);
1259                 } else {
1260                         ret = read_data(fd,buffer+4,len,pre);
1261                 }
1262
1263                 if (ret != len) {
1264                         cond_set_smb_read_error(pre,SMB_READ_ERROR);
1265                         return -1;
1266                 }
1267
1268                 /* not all of samba3 properly checks for packet-termination
1269                  * of strings. This ensures that we don't run off into
1270                  * empty space. */
1271                 SSVAL(buffer+4,len, 0);
1272         }
1273
1274         return len;
1275 }
1276
1277 /****************************************************************************
1278  Wrapper for receive_smb_raw().
1279  Checks the MAC on signed packets.
1280 ****************************************************************************/
1281
1282 bool receive_smb(int fd, char *buffer, unsigned int timeout, enum smb_read_errors *pre)
1283 {
1284         if (receive_smb_raw(fd, buffer, timeout, 0, pre) < 0) {
1285                 return false;
1286         }
1287
1288         /* Check the incoming SMB signature. */
1289         if (!srv_check_sign_mac(buffer, true)) {
1290                 DEBUG(0, ("receive_smb: SMB Signature verification "
1291                         "failed on incoming packet!\n"));
1292                 cond_set_smb_read_error(pre,SMB_READ_BAD_SIG);
1293                 return false;
1294         }
1295
1296         return true;
1297 }
1298
1299 /****************************************************************************
1300  Send an smb to a fd.
1301 ****************************************************************************/
1302
1303 bool send_smb(int fd, char *buffer)
1304 {
1305         size_t len;
1306         size_t nwritten=0;
1307         ssize_t ret;
1308
1309         /* Sign the outgoing packet if required. */
1310         srv_calculate_sign_mac(buffer);
1311
1312         len = smb_len(buffer) + 4;
1313
1314         while (nwritten < len) {
1315                 ret = write_data(fd,buffer+nwritten,len - nwritten);
1316                 if (ret <= 0) {
1317                         DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
1318                                 (int)len,(int)ret, strerror(errno) ));
1319                         return false;
1320                 }
1321                 nwritten += ret;
1322         }
1323
1324         return true;
1325 }
1326
1327 /****************************************************************************
1328  Open a socket of the specified type, port, and address for incoming data.
1329 ****************************************************************************/
1330
1331 int open_socket_in(int type,
1332                 uint16_t port,
1333                 int dlevel,
1334                 const struct sockaddr_storage *psock,
1335                 bool rebind)
1336 {
1337         struct sockaddr_storage sock;
1338         int res;
1339         socklen_t slen = sizeof(struct sockaddr_in);
1340
1341         sock = *psock;
1342
1343 #if defined(HAVE_IPV6)
1344         if (sock.ss_family == AF_INET6) {
1345                 ((struct sockaddr_in6 *)&sock)->sin6_port = htons(port);
1346                 slen = sizeof(struct sockaddr_in6);
1347         }
1348 #endif
1349         if (sock.ss_family == AF_INET) {
1350                 ((struct sockaddr_in *)&sock)->sin_port = htons(port);
1351         }
1352
1353         res = socket(sock.ss_family, type, 0 );
1354         if( res == -1 ) {
1355                 if( DEBUGLVL(0) ) {
1356                         dbgtext( "open_socket_in(): socket() call failed: " );
1357                         dbgtext( "%s\n", strerror( errno ) );
1358                 }
1359                 return -1;
1360         }
1361
1362         /* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
1363         {
1364                 int val = rebind ? 1 : 0;
1365                 if( setsockopt(res,SOL_SOCKET,SO_REUSEADDR,
1366                                         (char *)&val,sizeof(val)) == -1 ) {
1367                         if( DEBUGLVL( dlevel ) ) {
1368                                 dbgtext( "open_socket_in(): setsockopt: " );
1369                                 dbgtext( "SO_REUSEADDR = %s ",
1370                                                 val?"true":"false" );
1371                                 dbgtext( "on port %d failed ", port );
1372                                 dbgtext( "with error = %s\n", strerror(errno) );
1373                         }
1374                 }
1375 #ifdef SO_REUSEPORT
1376                 if( setsockopt(res,SOL_SOCKET,SO_REUSEPORT,
1377                                         (char *)&val,sizeof(val)) == -1 ) {
1378                         if( DEBUGLVL( dlevel ) ) {
1379                                 dbgtext( "open_socket_in(): setsockopt: ");
1380                                 dbgtext( "SO_REUSEPORT = %s ",
1381                                                 val?"true":"false");
1382                                 dbgtext( "on port %d failed ", port);
1383                                 dbgtext( "with error = %s\n", strerror(errno));
1384                         }
1385                 }
1386 #endif /* SO_REUSEPORT */
1387         }
1388
1389         /* now we've got a socket - we need to bind it */
1390         if (bind(res, (struct sockaddr *)&sock, slen) == -1 ) {
1391                 if( DEBUGLVL(dlevel) && (port == SMB_PORT1 ||
1392                                 port == SMB_PORT2 || port == NMB_PORT) ) {
1393                         char addr[INET6_ADDRSTRLEN];
1394                         print_sockaddr(addr, sizeof(addr),
1395                                         &sock);
1396                         dbgtext( "bind failed on port %d ", port);
1397                         dbgtext( "socket_addr = %s.\n", addr);
1398                         dbgtext( "Error = %s\n", strerror(errno));
1399                 }
1400                 close(res);
1401                 return -1;
1402         }
1403
1404         DEBUG( 10, ( "bind succeeded on port %d\n", port ) );
1405         return( res );
1406  }
1407
1408 /****************************************************************************
1409  Create an outgoing socket. timeout is in milliseconds.
1410 **************************************************************************/
1411
1412 int open_socket_out(int type,
1413                 const struct sockaddr_storage *pss,
1414                 uint16_t port,
1415                 int timeout)
1416 {
1417         char addr[INET6_ADDRSTRLEN];
1418         struct sockaddr_storage sock_out = *pss;
1419         int res,ret;
1420         int connect_loop = 10;
1421         int increment = 10;
1422
1423         /* create a socket to write to */
1424         res = socket(pss->ss_family, type, 0);
1425         if (res == -1) {
1426                 DEBUG(0,("socket error (%s)\n", strerror(errno)));
1427                 return -1;
1428         }
1429
1430         if (type != SOCK_STREAM) {
1431                 return res;
1432         }
1433
1434 #if defined(HAVE_IPV6)
1435         if (pss->ss_family == AF_INET6) {
1436                 struct sockaddr_in6 *psa6 = (struct sockaddr_in6 *)&sock_out;
1437                 psa6->sin6_port = htons(port);
1438                 if (psa6->sin6_scope_id == 0 &&
1439                                 IN6_IS_ADDR_LINKLOCAL(&psa6->sin6_addr)) {
1440                         setup_linklocal_scope_id(&sock_out);
1441                 }
1442         }
1443 #endif
1444         if (pss->ss_family == AF_INET) {
1445                 struct sockaddr_in *psa = (struct sockaddr_in *)&sock_out;
1446                 psa->sin_port = htons(port);
1447         }
1448
1449         /* set it non-blocking */
1450         set_blocking(res,false);
1451
1452         print_sockaddr(addr, sizeof(addr), &sock_out);
1453         DEBUG(3,("Connecting to %s at port %u\n",
1454                                 addr,
1455                                 (unsigned int)port));
1456
1457         /* and connect it to the destination */
1458   connect_again:
1459
1460         ret = connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out));
1461
1462         /* Some systems return EAGAIN when they mean EINPROGRESS */
1463         if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
1464                         errno == EAGAIN) && (connect_loop < timeout) ) {
1465                 smb_msleep(connect_loop);
1466                 timeout -= connect_loop;
1467                 connect_loop += increment;
1468                 if (increment < 250) {
1469                         /* After 8 rounds we end up at a max of 255 msec */
1470                         increment *= 1.5;
1471                 }
1472                 goto connect_again;
1473         }
1474
1475         if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
1476                         errno == EAGAIN)) {
1477                 DEBUG(1,("timeout connecting to %s:%u\n",
1478                                         addr,
1479                                         (unsigned int)port));
1480                 close(res);
1481                 return -1;
1482         }
1483
1484 #ifdef EISCONN
1485         if (ret < 0 && errno == EISCONN) {
1486                 errno = 0;
1487                 ret = 0;
1488         }
1489 #endif
1490
1491         if (ret < 0) {
1492                 DEBUG(2,("error connecting to %s:%d (%s)\n",
1493                                 addr,
1494                                 (unsigned int)port,
1495                                 strerror(errno)));
1496                 close(res);
1497                 return -1;
1498         }
1499
1500         /* set it blocking again */
1501         set_blocking(res,true);
1502
1503         return res;
1504 }
1505
1506 /****************************************************************************
1507  Create an outgoing TCP socket to any of the addrs. This is for
1508  simultaneous connects to port 445 and 139 of a host or even a variety
1509  of DC's all of which are equivalent for our purposes.
1510 **************************************************************************/
1511
1512 bool open_any_socket_out(struct sockaddr_storage *addrs, int num_addrs,
1513                          int timeout, int *fd_index, int *fd)
1514 {
1515         int i, resulting_index, res;
1516         int *sockets;
1517         bool good_connect;
1518
1519         fd_set r_fds, wr_fds;
1520         struct timeval tv;
1521         int maxfd;
1522
1523         int connect_loop = 10000; /* 10 milliseconds */
1524
1525         timeout *= 1000;        /* convert to microseconds */
1526
1527         sockets = SMB_MALLOC_ARRAY(int, num_addrs);
1528
1529         if (sockets == NULL)
1530                 return false;
1531
1532         resulting_index = -1;
1533
1534         for (i=0; i<num_addrs; i++)
1535                 sockets[i] = -1;
1536
1537         for (i=0; i<num_addrs; i++) {
1538                 sockets[i] = socket(addrs[i].ss_family, SOCK_STREAM, 0);
1539                 if (sockets[i] < 0)
1540                         goto done;
1541                 set_blocking(sockets[i], false);
1542         }
1543
1544  connect_again:
1545         good_connect = false;
1546
1547         for (i=0; i<num_addrs; i++) {
1548
1549                 if (sockets[i] == -1)
1550                         continue;
1551
1552                 if (connect(sockets[i], (struct sockaddr *)&(addrs[i]),
1553                             sizeof(*addrs)) == 0) {
1554                         /* Rather unlikely as we are non-blocking, but it
1555                          * might actually happen. */
1556                         resulting_index = i;
1557                         goto done;
1558                 }
1559
1560                 if (errno == EINPROGRESS || errno == EALREADY ||
1561 #ifdef EISCONN
1562                         errno == EISCONN ||
1563 #endif
1564                     errno == EAGAIN || errno == EINTR) {
1565                         /* These are the error messages that something is
1566                            progressing. */
1567                         good_connect = true;
1568                 } else if (errno != 0) {
1569                         /* There was a direct error */
1570                         close(sockets[i]);
1571                         sockets[i] = -1;
1572                 }
1573         }
1574
1575         if (!good_connect) {
1576                 /* All of the connect's resulted in real error conditions */
1577                 goto done;
1578         }
1579
1580         /* Lets see if any of the connect attempts succeeded */
1581
1582         maxfd = 0;
1583         FD_ZERO(&wr_fds);
1584         FD_ZERO(&r_fds);
1585
1586         for (i=0; i<num_addrs; i++) {
1587                 if (sockets[i] == -1)
1588                         continue;
1589                 FD_SET(sockets[i], &wr_fds);
1590                 FD_SET(sockets[i], &r_fds);
1591                 if (sockets[i]>maxfd)
1592                         maxfd = sockets[i];
1593         }
1594
1595         tv.tv_sec = 0;
1596         tv.tv_usec = connect_loop;
1597
1598         res = sys_select_intr(maxfd+1, &r_fds, &wr_fds, NULL, &tv);
1599
1600         if (res < 0)
1601                 goto done;
1602
1603         if (res == 0)
1604                 goto next_round;
1605
1606         for (i=0; i<num_addrs; i++) {
1607
1608                 if (sockets[i] == -1)
1609                         continue;
1610
1611                 /* Stevens, Network Programming says that if there's a
1612                  * successful connect, the socket is only writable. Upon an
1613                  * error, it's both readable and writable. */
1614
1615                 if (FD_ISSET(sockets[i], &r_fds) &&
1616                     FD_ISSET(sockets[i], &wr_fds)) {
1617                         /* readable and writable, so it's an error */
1618                         close(sockets[i]);
1619                         sockets[i] = -1;
1620                         continue;
1621                 }
1622
1623                 if (!FD_ISSET(sockets[i], &r_fds) &&
1624                     FD_ISSET(sockets[i], &wr_fds)) {
1625                         /* Only writable, so it's connected */
1626                         resulting_index = i;
1627                         goto done;
1628                 }
1629         }
1630
1631  next_round:
1632
1633         timeout -= connect_loop;
1634         if (timeout <= 0)
1635                 goto done;
1636         connect_loop *= 1.5;
1637         if (connect_loop > timeout)
1638                 connect_loop = timeout;
1639         goto connect_again;
1640
1641  done:
1642         for (i=0; i<num_addrs; i++) {
1643                 if (i == resulting_index)
1644                         continue;
1645                 if (sockets[i] >= 0)
1646                         close(sockets[i]);
1647         }
1648
1649         if (resulting_index >= 0) {
1650                 *fd_index = resulting_index;
1651                 *fd = sockets[*fd_index];
1652                 set_blocking(*fd, true);
1653         }
1654
1655         free(sockets);
1656
1657         return (resulting_index >= 0);
1658 }
1659 /****************************************************************************
1660  Open a connected UDP socket to host on port
1661 **************************************************************************/
1662
1663 int open_udp_socket(const char *host, int port)
1664 {
1665         int type = SOCK_DGRAM;
1666         struct sockaddr_in sock_out;
1667         int res;
1668         struct in_addr addr;
1669
1670         (void)interpret_addr2(&addr, host);
1671
1672         res = socket(PF_INET, type, 0);
1673         if (res == -1) {
1674                 return -1;
1675         }
1676
1677         memset((char *)&sock_out,'\0',sizeof(sock_out));
1678         putip((char *)&sock_out.sin_addr,(char *)&addr);
1679         sock_out.sin_port = htons(port);
1680         sock_out.sin_family = PF_INET;
1681
1682         if (connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out))) {
1683                 close(res);
1684                 return -1;
1685         }
1686
1687         return res;
1688 }
1689
1690 /*******************************************************************
1691  Return the IP addr of the remote end of a socket as a string.
1692  Optionally return the struct sockaddr_storage.
1693  ******************************************************************/
1694
1695 static const char *get_peer_addr_internal(int fd,
1696                                 char *addr_buf,
1697                                 size_t addr_buf_len,
1698                                 struct sockaddr_storage *pss,
1699                                 socklen_t *plength)
1700 {
1701         struct sockaddr_storage ss;
1702         socklen_t length = sizeof(ss);
1703
1704         strlcpy(addr_buf,"0.0.0.0",addr_buf_len);
1705
1706         if (fd == -1) {
1707                 return addr_buf;
1708         }
1709
1710         if (pss == NULL) {
1711                 pss = &ss;
1712         }
1713         if (plength == NULL) {
1714                 plength = &length;
1715         }
1716
1717         if (getpeername(fd, (struct sockaddr *)pss, plength) < 0) {
1718                 DEBUG(0,("getpeername failed. Error was %s\n",
1719                                         strerror(errno) ));
1720                 return addr_buf;
1721         }
1722
1723         print_sockaddr_len(addr_buf,
1724                         addr_buf_len,
1725                         pss,
1726                         *plength);
1727         return addr_buf;
1728 }
1729
1730 /*******************************************************************
1731  Matchname - determine if host name matches IP address. Used to
1732  confirm a hostname lookup to prevent spoof attacks.
1733 ******************************************************************/
1734
1735 static bool matchname(const char *remotehost,
1736                 const struct sockaddr_storage *pss,
1737                 socklen_t len)
1738 {
1739         struct addrinfo *res = NULL;
1740         struct addrinfo *ailist = NULL;
1741         char addr_buf[INET6_ADDRSTRLEN];
1742         bool ret = interpret_string_addr_internal(&ailist,
1743                         remotehost,
1744                         AI_ADDRCONFIG|AI_CANONNAME);
1745
1746         if (!ret || ailist == NULL) {
1747                 DEBUG(3,("matchname: getaddrinfo failed for "
1748                         "name %s [%s]\n",
1749                         remotehost,
1750                         gai_strerror(ret) ));
1751                 return false;
1752         }
1753
1754         /*
1755          * Make sure that getaddrinfo() returns the "correct" host name.
1756          */
1757
1758         if (ailist->ai_canonname == NULL ||
1759                 (!strequal(remotehost, ailist->ai_canonname) &&
1760                  !strequal(remotehost, "localhost"))) {
1761                 DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
1762                          remotehost,
1763                          ailist->ai_canonname ?
1764                                  ailist->ai_canonname : "(NULL)"));
1765                 freeaddrinfo(ailist);
1766                 return false;
1767         }
1768
1769         /* Look up the host address in the address list we just got. */
1770         for (res = ailist; res; res = res->ai_next) {
1771                 if (!res->ai_addr) {
1772                         continue;
1773                 }
1774                 if (addr_equal((const struct sockaddr_storage *)res->ai_addr,
1775                                         pss)) {
1776                         freeaddrinfo(ailist);
1777                         return true;
1778                 }
1779         }
1780
1781         /*
1782          * The host name does not map to the original host address. Perhaps
1783          * someone has compromised a name server. More likely someone botched
1784          * it, but that could be dangerous, too.
1785          */
1786
1787         DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
1788                 print_sockaddr_len(addr_buf,
1789                         sizeof(addr_buf),
1790                         pss,
1791                         len),
1792                  ailist->ai_canonname ? ailist->ai_canonname : "(NULL)"));
1793
1794         if (ailist) {
1795                 freeaddrinfo(ailist);
1796         }
1797         return false;
1798 }
1799
1800 static struct {
1801         struct sockaddr_storage ss;
1802         char *name;
1803 } nc;
1804
1805 /*******************************************************************
1806  Return the DNS name of the remote end of a socket.
1807 ******************************************************************/
1808
1809 const char *get_peer_name(int fd,
1810                                 bool force_lookup)
1811 {
1812         char addr_buf[INET6_ADDRSTRLEN];
1813         struct sockaddr_storage ss;
1814         socklen_t length = sizeof(ss);
1815         const char *p;
1816         int ret;
1817         char name_buf[MAX_DNS_NAME_LENGTH];
1818         char tmp_name[MAX_DNS_NAME_LENGTH];
1819
1820         /* reverse lookups can be *very* expensive, and in many
1821            situations won't work because many networks don't link dhcp
1822            with dns. To avoid the delay we avoid the lookup if
1823            possible */
1824         if (!lp_hostname_lookups() && (force_lookup == false)) {
1825                 length = sizeof(nc.ss);
1826                 p = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf),
1827                         &nc.ss, &length);
1828                 SAFE_FREE(nc.name);
1829                 nc.name = SMB_STRDUP(p);
1830                 return nc.name ? nc.name : "UNKNOWN";
1831         }
1832
1833         memset(&ss, '\0', sizeof(ss));
1834         p = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf), &ss, &length);
1835
1836         /* it might be the same as the last one - save some DNS work */
1837         if (addr_equal(&ss, &nc.ss)) {
1838                 return nc.name ? nc.name : "UNKNOWN";
1839         }
1840
1841         /* Not the same. Reset the cache. */
1842         zero_addr(&nc.ss);
1843         SAFE_FREE(nc.name);
1844         if (fd == -1) {
1845                 return "UNKNOWN";
1846         }
1847
1848         /* Look up the remote host name. */
1849         ret = getnameinfo((struct sockaddr *)&ss,
1850                         length,
1851                         name_buf,
1852                         sizeof(name_buf),
1853                         NULL,
1854                         0,
1855                         0);
1856
1857         if (ret) {
1858                 DEBUG(1,("get_peer_name: getnameinfo failed "
1859                         "for %s with error %s\n",
1860                         p,
1861                         gai_strerror(ret)));
1862                 strlcpy(name_buf, p, sizeof(name_buf));
1863         } else {
1864                 if (!matchname(name_buf, &ss, length)) {
1865                         DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
1866                         strlcpy(name_buf,"UNKNOWN",sizeof(name_buf));
1867                 }
1868         }
1869
1870         /* can't pass the same source and dest strings in when you
1871            use --enable-developer or the clobber_region() call will
1872            get you */
1873
1874         strlcpy(tmp_name, name_buf, sizeof(tmp_name));
1875         alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
1876         if (strstr(name_buf,"..")) {
1877                 strlcpy(name_buf, "UNKNOWN", sizeof(name_buf));
1878         }
1879
1880         nc.name = SMB_STRDUP(name_buf);
1881         return nc.name ? nc.name : "UNKNOWN";
1882 }
1883
1884 /*******************************************************************
1885  Return the IP addr of the remote end of a socket as a string.
1886  ******************************************************************/
1887
1888 const char *get_peer_addr(int fd, char *addr, size_t addr_len)
1889 {
1890         return get_peer_addr_internal(fd, addr, addr_len, NULL, NULL);
1891 }
1892
1893 /*******************************************************************
1894  Create protected unix domain socket.
1895
1896  Some unixes cannot set permissions on a ux-dom-sock, so we
1897  have to make sure that the directory contains the protection
1898  permissions instead.
1899  ******************************************************************/
1900
1901 int create_pipe_sock(const char *socket_dir,
1902                      const char *socket_name,
1903                      mode_t dir_perms)
1904 {
1905 #ifdef HAVE_UNIXSOCKET
1906         struct sockaddr_un sunaddr;
1907         struct stat st;
1908         int sock;
1909         mode_t old_umask;
1910         char *path = NULL;
1911
1912         old_umask = umask(0);
1913
1914         /* Create the socket directory or reuse the existing one */
1915
1916         if (lstat(socket_dir, &st) == -1) {
1917                 if (errno == ENOENT) {
1918                         /* Create directory */
1919                         if (mkdir(socket_dir, dir_perms) == -1) {
1920                                 DEBUG(0, ("error creating socket directory "
1921                                         "%s: %s\n", socket_dir,
1922                                         strerror(errno)));
1923                                 goto out_umask;
1924                         }
1925                 } else {
1926                         DEBUG(0, ("lstat failed on socket directory %s: %s\n",
1927                                 socket_dir, strerror(errno)));
1928                         goto out_umask;
1929                 }
1930         } else {
1931                 /* Check ownership and permission on existing directory */
1932                 if (!S_ISDIR(st.st_mode)) {
1933                         DEBUG(0, ("socket directory %s isn't a directory\n",
1934                                 socket_dir));
1935                         goto out_umask;
1936                 }
1937                 if ((st.st_uid != sec_initial_uid()) ||
1938                                 ((st.st_mode & 0777) != dir_perms)) {
1939                         DEBUG(0, ("invalid permissions on socket directory "
1940                                 "%s\n", socket_dir));
1941                         goto out_umask;
1942                 }
1943         }
1944
1945         /* Create the socket file */
1946
1947         sock = socket(AF_UNIX, SOCK_STREAM, 0);
1948
1949         if (sock == -1) {
1950                 DEBUG(0, ("create_pipe_sock: socket error %s\n",
1951                         strerror(errno) ));
1952                 goto out_close;
1953         }
1954
1955         asprintf(&path, "%s/%s", socket_dir, socket_name);
1956         if (!path) {
1957                 goto out_close;
1958         }
1959
1960         unlink(path);
1961         memset(&sunaddr, 0, sizeof(sunaddr));
1962         sunaddr.sun_family = AF_UNIX;
1963         strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path));
1964
1965         if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
1966                 DEBUG(0, ("bind failed on pipe socket %s: %s\n", path,
1967                         strerror(errno)));
1968                 goto out_close;
1969         }
1970
1971         if (listen(sock, 5) == -1) {
1972                 DEBUG(0, ("listen failed on pipe socket %s: %s\n", path,
1973                         strerror(errno)));
1974                 goto out_close;
1975         }
1976
1977         SAFE_FREE(path);
1978
1979         umask(old_umask);
1980         return sock;
1981
1982 out_close:
1983         SAFE_FREE(path);
1984         close(sock);
1985
1986 out_umask:
1987         umask(old_umask);
1988         return -1;
1989
1990 #else
1991         DEBUG(0, ("create_pipe_sock: No Unix sockets on this system\n"));
1992         return -1;
1993 #endif /* HAVE_UNIXSOCKET */
1994 }
1995
1996 /****************************************************************************
1997  Get my own canonical name, including domain.
1998 ****************************************************************************/
1999
2000 const char *get_mydnsfullname(void)
2001 {
2002         static char *dnshostname_cache;
2003
2004         if (dnshostname_cache == NULL || !*dnshostname_cache) {
2005                 struct addrinfo *res = NULL;
2006                 char my_hostname[HOST_NAME_MAX];
2007                 bool ret;
2008
2009                 /* get my host name */
2010                 if (gethostname(my_hostname, sizeof(my_hostname)) == -1) {
2011                         DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
2012                         return NULL;
2013                 }
2014
2015                 /* Ensure null termination. */
2016                 my_hostname[sizeof(my_hostname)-1] = '\0';
2017
2018                 ret = interpret_string_addr_internal(&res,
2019                                         my_hostname,
2020                                         AI_ADDRCONFIG|AI_CANONNAME);
2021
2022                 if (!ret || res == NULL) {
2023                         DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
2024                                 "name %s [%s]\n",
2025                                 my_hostname,
2026                                 gai_strerror(ret) ));
2027                         return NULL;
2028                 }
2029
2030                 /*
2031                  * Make sure that getaddrinfo() returns the "correct" host name.
2032                  */
2033
2034                 if (res->ai_canonname == NULL) {
2035                         DEBUG(3,("get_mydnsfullname: failed to get "
2036                                 "canonical name for %s\n",
2037                                 my_hostname));
2038                         freeaddrinfo(res);
2039                         return NULL;
2040                 }
2041
2042                 dnshostname_cache = SMB_STRDUP(res->ai_canonname);
2043                 freeaddrinfo(res);
2044         }
2045         return dnshostname_cache;
2046 }
2047
2048 /************************************************************
2049  Is this my name ?
2050 ************************************************************/
2051
2052 bool is_myname_or_ipaddr(const char *s)
2053 {
2054         TALLOC_CTX *ctx = talloc_tos();
2055         char *name = NULL;
2056         const char *dnsname;
2057         char *servername = NULL;
2058
2059         if (!s) {
2060                 return false;
2061         }
2062
2063         /* Santize the string from '\\name' */
2064         name = talloc_strdup(ctx, s);
2065         if (!name) {
2066                 return false;
2067         }
2068
2069         servername = strrchr_m(name, '\\' );
2070         if (!servername) {
2071                 servername = name;
2072         } else {
2073                 servername++;
2074         }
2075
2076         /* Optimize for the common case */
2077         if (strequal(servername, global_myname())) {
2078                 return true;
2079         }
2080
2081         /* Check for an alias */
2082         if (is_myname(servername)) {
2083                 return true;
2084         }
2085
2086         /* Check for loopback */
2087         if (strequal(servername, "127.0.0.1") ||
2088                         strequal(servername, "::1")) {
2089                 return true;
2090         }
2091
2092         if (strequal(servername, "localhost")) {
2093                 return true;
2094         }
2095
2096         /* Maybe it's my dns name */
2097         dnsname = get_mydnsfullname();
2098         if (dnsname && strequal(servername, dnsname)) {
2099                 return true;
2100         }
2101
2102         /* Handle possible CNAME records - convert to an IP addr. */
2103         if (!is_ipaddress(servername)) {
2104                 /* Use DNS to resolve the name, but only the first address */
2105                 struct sockaddr_storage ss;
2106                 if (interpret_string_addr(&ss, servername,0)) {
2107                         print_sockaddr(name,
2108                                         sizeof(name),
2109                                         &ss);
2110                         servername = name;
2111                 }
2112         }
2113
2114         /* Maybe its an IP address? */
2115         if (is_ipaddress(servername)) {
2116                 struct sockaddr_storage ss;
2117                 struct iface_struct *nics;
2118                 int i, n;
2119
2120                 if (!interpret_string_addr(&ss, servername, AI_NUMERICHOST)) {
2121                         return false;
2122                 }
2123
2124                 if (is_zero_addr(&ss) || is_loopback_addr(&ss)) {
2125                         return false;
2126                 }
2127
2128                 nics = TALLOC_ARRAY(ctx, struct iface_struct,
2129                                         MAX_INTERFACES);
2130                 if (!nics) {
2131                         return false;
2132                 }
2133                 n = get_interfaces(nics, MAX_INTERFACES);
2134                 for (i=0; i<n; i++) {
2135                         if (addr_equal(&nics[i].ip, &ss)) {
2136                                 TALLOC_FREE(nics);
2137                                 return true;
2138                         }
2139                 }
2140                 TALLOC_FREE(nics);
2141         }
2142
2143         /* No match */
2144         return false;
2145 }