lib/util/util_net.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
   5    Copyright (C) Andrew Tridgell 1992-1998
   6    Copyright (C) Jeremy Allison  1992-2007
   7    Copyright (C) Simo Sorce 2001
   8    Copyright (C) Jim McDonough (jmcd@us.ibm.com)  2003.
   9    Copyright (C) James J Myers 2003
  10    Copyright (C) Tim Potter      2000-2001
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "system/network.h"
  28 #include "system/locale.h"
  29 #include "system/filesys.h"
  30 #include "lib/util/util_net.h"
  31 #undef strcasecmp
  32
  33 /*******************************************************************
  34  Set an address to INADDR_ANY.
  35 ******************************************************************/
  36
  37 void zero_sockaddr(struct sockaddr_storage *pss)
  38 {
  39         ZERO_STRUCTP(pss);
  40         /* Ensure we're at least a valid sockaddr-storage. */
  41         pss->ss_family = AF_INET;
  42 }
  43
  44 /**
  45  * Wrap getaddrinfo...
  46  */
  47 bool interpret_string_addr_internal(struct addrinfo **ppres,
  48                                         const char *str, int flags)
  49 {
  50         int ret;
  51         struct addrinfo hints;
  52
  53         ZERO_STRUCT(hints);
  54
  55         /* By default make sure it supports TCP. */
  56         hints.ai_socktype = SOCK_STREAM;
  57
  58         /* always try as a numeric host first. This prevents unnecessary name
  59          * lookups, and also ensures we accept IPv6 addresses */
  60         hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
  61         ret = getaddrinfo(str, NULL, &hints, ppres);
  62         if (ret == 0) {
  63                 return true;
  64         }
  65
  66         hints.ai_flags = flags;
  67
  68         /* Linux man page on getaddrinfo() says port will be
  69            uninitialized when service string is NULL */
  70
  71         ret = getaddrinfo(str, NULL,
  72                         &hints,
  73                         ppres);
  74
  75         if (ret) {
  76                 DEBUG(3, ("interpret_string_addr_internal: "
  77                           "getaddrinfo failed for name %s (flags %d) [%s]\n",
  78                           str, flags, gai_strerror(ret)));
  79                 return false;
  80         }
  81         return true;
  82 }
  83
  84 /*******************************************************************
  85  Map a text hostname or IP address (IPv4 or IPv6) into a
  86  struct sockaddr_storage. Takes a flag which allows it to
  87  prefer an IPv4 address (needed for DC's).
  88 ******************************************************************/
  89
  90 static bool interpret_string_addr_pref(struct sockaddr_storage *pss,
  91                 const char *str,
  92                 int flags,
  93                 bool prefer_ipv4)
  94 {
  95         struct addrinfo *res = NULL;
  96 #if defined(HAVE_IPV6)
  97         char addr[INET6_ADDRSTRLEN];
  98         unsigned int scope_id = 0;
  99         int int_flags;
 100
 101         if (strchr_m(str, ':')) {
 102                 char *p = strchr_m(str, '%');
 103
 104                 /*
 105                  * Cope with link-local.
 106                  * This is IP:v6:addr%ifname.
 107                  */
 108
 109                 if (p && (p > str) && ((scope_id = if_nametoindex(p+1)) != 0)) {
 110                         strlcpy(addr, str,
 111                                 MIN(PTR_DIFF(p,str)+1,
 112                                         sizeof(addr)));
 113                         str = addr;
 114                 }
 115         }
 116 #endif
 117
 118         zero_sockaddr(pss);
 119
 120         if (flags & AI_NUMERICHOST) {
 121                 int_flags = flags;
 122         } else {
 123                 int_flags = flags|AI_ADDRCONFIG;
 124         }
 125
 126         if (!interpret_string_addr_internal(&res, str, int_flags)) {
 127                 return false;
 128         }
 129         if (!res) {
 130                 return false;
 131         }
 132
 133         if (prefer_ipv4) {
 134                 struct addrinfo *p;
 135
 136                 for (p = res; p; p = p->ai_next) {
 137                         if (p->ai_family == AF_INET) {
 138                                 memcpy(pss, p->ai_addr, p->ai_addrlen);
 139                                 break;
 140                         }
 141                 }
 142                 if (p == NULL) {
 143                         /* Copy the first sockaddr. */
 144                         memcpy(pss, res->ai_addr, res->ai_addrlen);
 145                 }
 146         } else {
 147                 /* Copy the first sockaddr. */
 148                 memcpy(pss, res->ai_addr, res->ai_addrlen);
 149         }
 150
 151 #if defined(HAVE_IPV6)
 152         if (pss->ss_family == AF_INET6 && scope_id) {
 153                 struct sockaddr_in6 *ps6 = (struct sockaddr_in6 *)pss;
 154                 if (IN6_IS_ADDR_LINKLOCAL(&ps6->sin6_addr) &&
 155                                 ps6->sin6_scope_id == 0) {
 156                         ps6->sin6_scope_id = scope_id;
 157                 }
 158         }
 159 #endif
 160
 161         freeaddrinfo(res);
 162         return true;
 163 }
 164
 165 /*******************************************************************
 166  Map a text hostname or IP address (IPv4 or IPv6) into a
 167  struct sockaddr_storage. Address agnostic version.
 168 ******************************************************************/
 169
 170 bool interpret_string_addr(struct sockaddr_storage *pss,
 171                 const char *str,
 172                 int flags)
 173 {
 174         return interpret_string_addr_pref(pss,
 175                                         str,
 176                                         flags,
 177                                         false);
 178 }
 179
 180 /*******************************************************************
 181  Map a text hostname or IP address (IPv4 or IPv6) into a
 182  struct sockaddr_storage. Version that prefers IPv4.
 183 ******************************************************************/
 184
 185 bool interpret_string_addr_prefer_ipv4(struct sockaddr_storage *pss,
 186                 const char *str,
 187                 int flags)
 188 {
 189         return interpret_string_addr_pref(pss,
 190                                         str,
 191                                         flags,
 192                                         true);
 193 }
 194
 195 /**
 196  * Interpret an internet address or name into an IP address in 4 byte form.
 197  * RETURNS IN NETWORK BYTE ORDER (big endian).
 198  */
 199
 200 uint32_t interpret_addr(const char *str)
 201 {
 202         uint32_t ret;
 203
 204         /* If it's in the form of an IP address then
 205          * get the lib to interpret it */
 206         if (is_ipaddress_v4(str)) {
 207                 struct in_addr dest;
 208
 209                 if (inet_pton(AF_INET, str, &dest) <= 0) {
 210                         /* Error - this shouldn't happen ! */
 211                         DEBUG(0,("interpret_addr: inet_pton failed "
 212                                 "host %s\n",
 213                                 str));
 214                         return 0;
 215                 }
 216                 ret = dest.s_addr; /* NETWORK BYTE ORDER ! */
 217         } else {
 218                 /* Otherwise assume it's a network name of some sort and use
 219                         getadddrinfo. */
 220                 struct addrinfo *res = NULL;
 221                 struct addrinfo *res_list = NULL;
 222                 if (!interpret_string_addr_internal(&res_list,
 223                                         str,
 224                                         AI_ADDRCONFIG)) {
 225                         DEBUG(3,("interpret_addr: Unknown host. %s\n",str));
 226                         return 0;
 227                 }
 228
 229                 /* Find the first IPv4 address. */
 230                 for (res = res_list; res; res = res->ai_next) {
 231                         if (res->ai_family != AF_INET) {
 232                                 continue;
 233                         }
 234                         if (res->ai_addr == NULL) {
 235                                 continue;
 236                         }
 237                         break;
 238                 }
 239                 if(res == NULL) {
 240                         DEBUG(3,("interpret_addr: host address is "
 241                                 "invalid for host %s\n",str));
 242                         if (res_list) {
 243                                 freeaddrinfo(res_list);
 244                         }
 245                         return 0;
 246                 }
 247                 memcpy((char *)&ret,
 248                         &((struct sockaddr_in *)res->ai_addr)->sin_addr.s_addr,
 249                         sizeof(ret));
 250                 if (res_list) {
 251                         freeaddrinfo(res_list);
 252                 }
 253         }
 254
 255         /* This is so bogus - all callers need fixing... JRA. */
 256         if (ret == (uint32_t)-1) {
 257                 return 0;
 258         }
 259
 260         return ret;
 261 }
 262
 263 /**
 264  A convenient addition to interpret_addr().
 265 **/
 266 _PUBLIC_ struct in_addr interpret_addr2(const char *str)
 267 {
 268         struct in_addr ret;
 269         uint32_t a = interpret_addr(str);
 270         ret.s_addr = a;
 271         return ret;
 272 }
 273
 274 /**
 275  Check if an IP is the 0.0.0.0.
 276 **/
 277
 278 _PUBLIC_ bool is_zero_ip_v4(struct in_addr ip)
 279 {
 280         return ip.s_addr == 0;
 281 }
 282
 283 /**
 284  Are two IPs on the same subnet?
 285 **/
 286
 287 _PUBLIC_ bool same_net_v4(struct in_addr ip1, struct in_addr ip2, struct in_addr mask)
 288 {
 289         uint32_t net1,net2,nmask;
 290
 291         nmask = ntohl(mask.s_addr);
 292         net1  = ntohl(ip1.s_addr);
 293         net2  = ntohl(ip2.s_addr);
 294
 295         return((net1 & nmask) == (net2 & nmask));
 296 }
 297
 298 /**
 299  * Return true if a string could be an IPv4 address.
 300  */
 301
 302 bool is_ipaddress_v4(const char *str)
 303 {
 304         int ret = -1;
 305         struct in_addr dest;
 306
 307         ret = inet_pton(AF_INET, str, &dest);
 308         if (ret > 0) {
 309                 return true;
 310         }
 311         return false;
 312 }
 313
 314 /**
 315  * Return true if a string could be a IPv6 address.
 316  */
 317
 318 bool is_ipaddress_v6(const char *str)
 319 {
 320 #if defined(HAVE_IPV6)
 321         int ret = -1;
 322
 323         if (strchr_m(str, ':')) {
 324                 char addr[INET6_ADDRSTRLEN];
 325                 struct in6_addr dest6;
 326                 const char *sp = str;
 327                 char *p = strchr_m(str, '%');
 328
 329                 /*
 330                  * Cope with link-local.
 331                  * This is IP:v6:addr%ifname.
 332                  */
 333
 334                 if (p && (p > str) && (if_nametoindex(p+1) != 0)) {
 335                         strlcpy(addr, str,
 336                                 MIN(PTR_DIFF(p,str)+1,
 337                                         sizeof(addr)));
 338                         sp = addr;
 339                 }
 340                 ret = inet_pton(AF_INET6, sp, &dest6);
 341                 if (ret > 0) {
 342                         return true;
 343                 }
 344         }
 345 #endif
 346         return false;
 347 }
 348
 349 /**
 350  * Return true if a string could be an IPv4 or IPv6 address.
 351  */
 352
 353 bool is_ipaddress(const char *str)
 354 {
 355         return is_ipaddress_v4(str) || is_ipaddress_v6(str);
 356 }
 357
 358 /**
 359  * Is a sockaddr a broadcast address ?
 360  */
 361
 362 bool is_broadcast_addr(const struct sockaddr *pss)
 363 {
 364 #if defined(HAVE_IPV6)
 365         if (pss->sa_family == AF_INET6) {
 366                 const struct in6_addr *sin6 =
 367                         &((const struct sockaddr_in6 *)pss)->sin6_addr;
 368                 return IN6_IS_ADDR_MULTICAST(sin6);
 369         }
 370 #endif
 371         if (pss->sa_family == AF_INET) {
 372                 uint32_t addr =
 373                 ntohl(((const struct sockaddr_in *)pss)->sin_addr.s_addr);
 374                 return addr == INADDR_BROADCAST;
 375         }
 376         return false;
 377 }
 378
 379 /**
 380  * Check if an IPv7 is 127.0.0.1
 381  */
 382 bool is_loopback_ip_v4(struct in_addr ip)
 383 {
 384         struct in_addr a;
 385         a.s_addr = htonl(INADDR_LOOPBACK);
 386         return(ip.s_addr == a.s_addr);
 387 }
 388
 389 /**
 390  * Check if a struct sockaddr is the loopback address.
 391  */
 392 bool is_loopback_addr(const struct sockaddr *pss)
 393 {
 394 #if defined(HAVE_IPV6)
 395         if (pss->sa_family == AF_INET6) {
 396                 const struct in6_addr *pin6 =
 397                         &((const struct sockaddr_in6 *)pss)->sin6_addr;
 398                 return IN6_IS_ADDR_LOOPBACK(pin6);
 399         }
 400 #endif
 401         if (pss->sa_family == AF_INET) {
 402                 const struct in_addr *pin = &((const struct sockaddr_in *)pss)->sin_addr;
 403                 return is_loopback_ip_v4(*pin);
 404         }
 405         return false;
 406 }
 407
 408 /**
 409  * Check if a struct sockaddr has an unspecified address.
 410  */
 411 bool is_zero_addr(const struct sockaddr_storage *pss)
 412 {
 413 #if defined(HAVE_IPV6)
 414         if (pss->ss_family == AF_INET6) {
 415                 const struct in6_addr *pin6 =
 416                         &((const struct sockaddr_in6 *)pss)->sin6_addr;
 417                 return IN6_IS_ADDR_UNSPECIFIED(pin6);
 418         }
 419 #endif
 420         if (pss->ss_family == AF_INET) {
 421                 const struct in_addr *pin = &((const struct sockaddr_in *)pss)->sin_addr;
 422                 return is_zero_ip_v4(*pin);
 423         }
 424         return false;
 425 }
 426
 427 /**
 428  * Set an IP to 0.0.0.0.
 429  */
 430 void zero_ip_v4(struct in_addr *ip)
 431 {
 432         ZERO_STRUCTP(ip);
 433 }
 434
 435 /**
 436  * Convert an IPv4 struct in_addr to a struct sockaddr_storage.
 437  */
 438 void in_addr_to_sockaddr_storage(struct sockaddr_storage *ss,
 439                 struct in_addr ip)
 440 {
 441         struct sockaddr_in *sa = (struct sockaddr_in *)ss;
 442         ZERO_STRUCTP(ss);
 443         sa->sin_family = AF_INET;
 444         sa->sin_addr = ip;
 445 }
 446
 447 #if defined(HAVE_IPV6)
 448 /**
 449  * Convert an IPv6 struct in_addr to a struct sockaddr_storage.
 450  */
 451 void in6_addr_to_sockaddr_storage(struct sockaddr_storage *ss,
 452                 struct in6_addr ip)
 453 {
 454         struct sockaddr_in6 *sa = (struct sockaddr_in6 *)ss;
 455         memset(ss, '\0', sizeof(*ss));
 456         sa->sin6_family = AF_INET6;
 457         sa->sin6_addr = ip;
 458 }
 459 #endif
 460
 461 /**
 462  * Are two IPs on the same subnet?
 463  */
 464 bool same_net(const struct sockaddr *ip1,
 465                 const struct sockaddr *ip2,
 466                 const struct sockaddr *mask)
 467 {
 468         if (ip1->sa_family != ip2->sa_family) {
 469                 /* Never on the same net. */
 470                 return false;
 471         }
 472
 473 #if defined(HAVE_IPV6)
 474         if (ip1->sa_family == AF_INET6) {
 475                 struct sockaddr_in6 ip1_6 = *(const struct sockaddr_in6 *)ip1;
 476                 struct sockaddr_in6 ip2_6 = *(const struct sockaddr_in6 *)ip2;
 477                 struct sockaddr_in6 mask_6 = *(const struct sockaddr_in6 *)mask;
 478                 char *p1 = (char *)&ip1_6.sin6_addr;
 479                 char *p2 = (char *)&ip2_6.sin6_addr;
 480                 char *m = (char *)&mask_6.sin6_addr;
 481                 int i;
 482
 483                 for (i = 0; i < sizeof(struct in6_addr); i++) {
 484                         *p1++ &= *m;
 485                         *p2++ &= *m;
 486                         m++;
 487                 }
 488                 return (memcmp(&ip1_6.sin6_addr,
 489                                 &ip2_6.sin6_addr,
 490                                 sizeof(struct in6_addr)) == 0);
 491         }
 492 #endif
 493         if (ip1->sa_family == AF_INET) {
 494                 return same_net_v4(((const struct sockaddr_in *)ip1)->sin_addr,
 495                                 ((const struct sockaddr_in *)ip2)->sin_addr,
 496                                 ((const struct sockaddr_in *)mask)->sin_addr);
 497         }
 498         return false;
 499 }
 500
 501 /**
 502  * Are two sockaddr 's the same family and address ? Ignore port etc.
 503  */
 504
 505 bool sockaddr_equal(const struct sockaddr *ip1,
 506                 const struct sockaddr *ip2)
 507 {
 508         if (ip1->sa_family != ip2->sa_family) {
 509                 /* Never the same. */
 510                 return false;
 511         }
 512
 513 #if defined(HAVE_IPV6)
 514         if (ip1->sa_family == AF_INET6) {
 515                 return (memcmp(&((const struct sockaddr_in6 *)ip1)->sin6_addr,
 516                                 &((const struct sockaddr_in6 *)ip2)->sin6_addr,
 517                                 sizeof(struct in6_addr)) == 0);
 518         }
 519 #endif
 520         if (ip1->sa_family == AF_INET) {
 521                 return (memcmp(&((const struct sockaddr_in *)ip1)->sin_addr,
 522                                 &((const struct sockaddr_in *)ip2)->sin_addr,
 523                                 sizeof(struct in_addr)) == 0);
 524         }
 525         return false;
 526 }
 527
 528 /**
 529  * Is an IP address the INADDR_ANY or in6addr_any value ?
 530  */
 531 bool is_address_any(const struct sockaddr *psa)
 532 {
 533 #if defined(HAVE_IPV6)
 534         if (psa->sa_family == AF_INET6) {
 535                 const struct sockaddr_in6 *si6 = (const struct sockaddr_in6 *)psa;
 536                 if (memcmp(&in6addr_any,
 537                                 &si6->sin6_addr,
 538                                 sizeof(in6addr_any)) == 0) {
 539                         return true;
 540                 }
 541                 return false;
 542         }
 543 #endif
 544         if (psa->sa_family == AF_INET) {
 545                 const struct sockaddr_in *si = (const struct sockaddr_in *)psa;
 546                 if (si->sin_addr.s_addr == INADDR_ANY) {
 547                         return true;
 548                 }
 549                 return false;
 550         }
 551         return false;
 552 }
 553
 554 void set_sockaddr_port(struct sockaddr *psa, uint16_t port)
 555 {
 556 #if defined(HAVE_IPV6)
 557         if (psa->sa_family == AF_INET6) {
 558                 ((struct sockaddr_in6 *)psa)->sin6_port = htons(port);
 559         }
 560 #endif
 561         if (psa->sa_family == AF_INET) {
 562                 ((struct sockaddr_in *)psa)->sin_port = htons(port);
 563         }
 564 }
 565
 566
 567 /****************************************************************************
 568  Get a port number in host byte order from a sockaddr_storage.
 569 ****************************************************************************/
 570
 571 uint16_t get_sockaddr_port(const struct sockaddr_storage *pss)
 572 {
 573         uint16_t port = 0;
 574
 575         if (pss->ss_family != AF_INET) {
 576 #if defined(HAVE_IPV6)
 577                 /* IPv6 */
 578                 const struct sockaddr_in6 *sa6 =
 579                         (const struct sockaddr_in6 *)pss;
 580                 port = ntohs(sa6->sin6_port);
 581 #endif
 582         } else {
 583                 const struct sockaddr_in *sa =
 584                         (const struct sockaddr_in *)pss;
 585                 port = ntohs(sa->sin_port);
 586         }
 587         return port;
 588 }
 589
 590 /****************************************************************************
 591  Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
 592 ****************************************************************************/
 593
 594 char *print_sockaddr_len(char *dest,
 595                          size_t destlen,
 596                         const struct sockaddr *psa,
 597                         socklen_t psalen)
 598 {
 599         if (destlen > 0) {
 600                 dest[0] = '\0';
 601         }
 602         (void)sys_getnameinfo(psa,
 603                         psalen,
 604                         dest, destlen,
 605                         NULL, 0,
 606                         NI_NUMERICHOST);
 607         return dest;
 608 }
 609
 610 /****************************************************************************
 611  Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
 612 ****************************************************************************/
 613
 614 char *print_sockaddr(char *dest,
 615                         size_t destlen,
 616                         const struct sockaddr_storage *psa)
 617 {
 618         return print_sockaddr_len(dest, destlen, (const struct sockaddr *)psa,
 619                         sizeof(struct sockaddr_storage));
 620 }
 621
 622 /****************************************************************************
 623  Print out a canonical IPv4 or IPv6 address from a struct sockaddr_storage.
 624 ****************************************************************************/
 625
 626 char *print_canonical_sockaddr(TALLOC_CTX *ctx,
 627                         const struct sockaddr_storage *pss)
 628 {
 629         char addr[INET6_ADDRSTRLEN];
 630         char *dest = NULL;
 631         int ret;
 632
 633         /* Linux getnameinfo() man pages says port is unitialized if
 634            service name is NULL. */
 635
 636         ret = sys_getnameinfo((const struct sockaddr *)pss,
 637                         sizeof(struct sockaddr_storage),
 638                         addr, sizeof(addr),
 639                         NULL, 0,
 640                         NI_NUMERICHOST);
 641         if (ret != 0) {
 642                 return NULL;
 643         }
 644
 645         if (pss->ss_family != AF_INET) {
 646 #if defined(HAVE_IPV6)
 647                 dest = talloc_asprintf(ctx, "[%s]", addr);
 648 #else
 649                 return NULL;
 650 #endif
 651         } else {
 652                 dest = talloc_asprintf(ctx, "%s", addr);
 653         }
 654
 655         return dest;
 656 }
 657
 658 /****************************************************************************
 659  Return the port number we've bound to on a socket.
 660 ****************************************************************************/
 661
 662 int get_socket_port(int fd)
 663 {
 664         struct sockaddr_storage sa;
 665         socklen_t length = sizeof(sa);
 666
 667         if (fd == -1) {
 668                 return -1;
 669         }
 670
 671         if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
 672                 int level = (errno == ENOTCONN) ? 2 : 0;
 673                 DEBUG(level, ("getsockname failed. Error was %s\n",
 674                                strerror(errno)));
 675                 return -1;
 676         }
 677
 678 #if defined(HAVE_IPV6)
 679         if (sa.ss_family == AF_INET6) {
 680                 return ntohs(((struct sockaddr_in6 *)&sa)->sin6_port);
 681         }
 682 #endif
 683         if (sa.ss_family == AF_INET) {
 684                 return ntohs(((struct sockaddr_in *)&sa)->sin_port);
 685         }
 686         return -1;
 687 }
 688
 689 /****************************************************************************
 690  Return the string of an IP address (IPv4 or IPv6).
 691 ****************************************************************************/
 692
 693 static const char *get_socket_addr(int fd, char *addr_buf, size_t addr_len)
 694 {
 695         struct sockaddr_storage sa;
 696         socklen_t length = sizeof(sa);
 697
 698         /* Ok, returning a hard coded IPv4 address
 699          * is bogus, but it's just as bogus as a
 700          * zero IPv6 address. No good choice here.
 701          */
 702
 703         strlcpy(addr_buf, "0.0.0.0", addr_len);
 704
 705         if (fd == -1) {
 706                 return addr_buf;
 707         }
 708
 709         if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
 710                 DEBUG(0,("getsockname failed. Error was %s\n",
 711                         strerror(errno) ));
 712                 return addr_buf;
 713         }
 714
 715         return print_sockaddr_len(addr_buf, addr_len, (struct sockaddr *)&sa, length);
 716 }
 717
 718 const char *client_socket_addr(int fd, char *addr, size_t addr_len)
 719 {
 720         return get_socket_addr(fd, addr, addr_len);
 721 }
 722
 723
 724 enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON};
 725
 726 typedef struct smb_socket_option {
 727         const char *name;
 728         int level;
 729         int option;
 730         int value;
 731         int opttype;
 732 } smb_socket_option;
 733
 734 static const smb_socket_option socket_options[] = {
 735   {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},
 736   {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL},
 737   {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL},
 738 #ifdef TCP_NODELAY
 739   {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL},
 740 #endif
 741 #ifdef TCP_KEEPCNT
 742   {"TCP_KEEPCNT", IPPROTO_TCP, TCP_KEEPCNT, 0, OPT_INT},
 743 #endif
 744 #ifdef TCP_KEEPIDLE
 745   {"TCP_KEEPIDLE", IPPROTO_TCP, TCP_KEEPIDLE, 0, OPT_INT},
 746 #endif
 747 #ifdef TCP_KEEPINTVL
 748   {"TCP_KEEPINTVL", IPPROTO_TCP, TCP_KEEPINTVL, 0, OPT_INT},
 749 #endif
 750 #ifdef IPTOS_LOWDELAY
 751   {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
 752 #endif
 753 #ifdef IPTOS_THROUGHPUT
 754   {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
 755 #endif
 756 #ifdef SO_REUSEPORT
 757   {"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
 758 #endif
 759 #ifdef SO_SNDBUF
 760   {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
 761 #endif
 762 #ifdef SO_RCVBUF
 763   {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
 764 #endif
 765 #ifdef SO_SNDLOWAT
 766   {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
 767 #endif
 768 #ifdef SO_RCVLOWAT
 769   {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
 770 #endif
 771 #ifdef SO_SNDTIMEO
 772   {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
 773 #endif
 774 #ifdef SO_RCVTIMEO
 775   {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
 776 #endif
 777 #ifdef TCP_FASTACK
 778   {"TCP_FASTACK", IPPROTO_TCP, TCP_FASTACK, 0, OPT_INT},
 779 #endif
 780 #ifdef TCP_QUICKACK
 781   {"TCP_QUICKACK", IPPROTO_TCP, TCP_QUICKACK, 0, OPT_BOOL},
 782 #endif
 783 #ifdef TCP_KEEPALIVE_THRESHOLD
 784   {"TCP_KEEPALIVE_THRESHOLD", IPPROTO_TCP, TCP_KEEPALIVE_THRESHOLD, 0, OPT_INT},
 785 #endif
 786 #ifdef TCP_KEEPALIVE_ABORT_THRESHOLD
 787   {"TCP_KEEPALIVE_ABORT_THRESHOLD", IPPROTO_TCP, TCP_KEEPALIVE_ABORT_THRESHOLD, 0, OPT_INT},
 788 #endif
 789   {NULL,0,0,0,0}};
 790
 791 /****************************************************************************
 792  Print socket options.
 793 ****************************************************************************/
 794
 795 static void print_socket_options(int s)
 796 {
 797         int value;
 798         socklen_t vlen = 4;
 799         const smb_socket_option *p = &socket_options[0];
 800
 801         /* wrapped in if statement to prevent streams
 802          * leak in SCO Openserver 5.0 */
 803         /* reported on samba-technical  --jerry */
 804         if ( DEBUGLEVEL >= 5 ) {
 805                 DEBUG(5,("Socket options:\n"));
 806                 for (; p->name != NULL; p++) {
 807                         if (getsockopt(s, p->level, p->option,
 808                                                 (void *)&value, &vlen) == -1) {
 809                                 DEBUGADD(5,("\tCould not test socket option %s.\n",
 810                                                         p->name));
 811                         } else {
 812                                 DEBUGADD(5,("\t%s = %d\n",
 813                                                         p->name,value));
 814                         }
 815                 }
 816         }
 817  }
 818
 819 /****************************************************************************
 820  Set user socket options.
 821 ****************************************************************************/
 822
 823 void set_socket_options(int fd, const char *options)
 824 {
 825         TALLOC_CTX *ctx = talloc_new(NULL);
 826         char *tok;
 827
 828         while (next_token_talloc(ctx, &options, &tok," \t,")) {
 829                 int ret=0,i;
 830                 int value = 1;
 831                 char *p;
 832                 bool got_value = false;
 833
 834                 if ((p = strchr_m(tok,'='))) {
 835                         *p = 0;
 836                         value = atoi(p+1);
 837                         got_value = true;
 838                 }
 839
 840                 for (i=0;socket_options[i].name;i++)
 841                         if (strequal(socket_options[i].name,tok))
 842                                 break;
 843
 844                 if (!socket_options[i].name) {
 845                         DEBUG(0,("Unknown socket option %s\n",tok));
 846                         continue;
 847                 }
 848
 849                 switch (socket_options[i].opttype) {
 850                 case OPT_BOOL:
 851                 case OPT_INT:
 852                         ret = setsockopt(fd,socket_options[i].level,
 853                                         socket_options[i].option,
 854                                         (char *)&value,sizeof(int));
 855                         break;
 856
 857                 case OPT_ON:
 858                         if (got_value)
 859                                 DEBUG(0,("syntax error - %s "
 860                                         "does not take a value\n",tok));
 861
 862                         {
 863                                 int on = socket_options[i].value;
 864                                 ret = setsockopt(fd,socket_options[i].level,
 865                                         socket_options[i].option,
 866                                         (char *)&on,sizeof(int));
 867                         }
 868                         break;
 869                 }
 870
 871                 if (ret != 0) {
 872                         /* be aware that some systems like Solaris return
 873                          * EINVAL to a setsockopt() call when the client
 874                          * sent a RST previously - no need to worry */
 875                         DEBUG(2,("Failed to set socket option %s (Error %s)\n",
 876                                 tok, strerror(errno) ));
 877                 }
 878         }
 879
 880         TALLOC_FREE(ctx);
 881         print_socket_options(fd);
 882 }