lhnet.c

   1
   2 // Written by Forest Hale 2003-06-15 and placed into public domain.
   3
   4 #ifdef WIN32
   5 // Windows XP or higher is required for getaddrinfo, but the inclusion of wspiapi provides fallbacks for older versions
   6 # define _WIN32_WINNT 0x0501
   7 # include <winsock2.h>
   8 # include <ws2tcpip.h>
   9 # ifdef USE_WSPIAPI_H
  10 #  include <wspiapi.h>
  11 # endif
  12 #endif
  13
  14 #ifndef STANDALONETEST
  15 #include "quakedef.h"
  16 #endif
  17
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <time.h>
  21 #include <string.h>
  22 #ifndef WIN32
  23 #include <unistd.h>
  24 #include <sys/types.h>
  25 #include <sys/socket.h>
  26 #include <sys/ioctl.h>
  27 #include <errno.h>
  28 #include <netdb.h>
  29 #include <netinet/in.h>
  30 #include <arpa/inet.h>
  31 #include <net/if.h>
  32 #endif
  33
  34 #ifdef __MORPHOS__
  35 #include <proto/socket.h>
  36 #endif
  37
  38 // for Z_Malloc/Z_Free in quake
  39 #ifndef STANDALONETEST
  40 #include "zone.h"
  41 #include "sys.h"
  42 #include "netconn.h"
  43 #else
  44 #define Con_Print printf
  45 #define Con_Printf printf
  46 #define Z_Malloc malloc
  47 #define Z_Free free
  48 #endif
  49
  50 #include "lhnet.h"
  51
  52 #if defined(WIN32)
  53 #define EWOULDBLOCK WSAEWOULDBLOCK
  54 #define ECONNREFUSED WSAECONNREFUSED
  55
  56 #define SOCKETERRNO WSAGetLastError()
  57
  58 #define IOC_VENDOR 0x18000000
  59 #define _WSAIOW(x,y) (IOC_IN|(x)|(y))
  60 #define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12)
  61
  62 #define SOCKLEN_T int
  63 #elif defined(__MORPHOS__)
  64 #define ioctlsocket IoctlSocket
  65 #define closesocket CloseSocket
  66 #define SOCKETERRNO Errno()
  67
  68 #define SOCKLEN_T int
  69 #else
  70 #define ioctlsocket ioctl
  71 #define closesocket close
  72 #define SOCKETERRNO errno
  73
  74 #define SOCKLEN_T socklen_t
  75 #endif
  76
  77 typedef struct lhnetaddressnative_s
  78 {
  79         lhnetaddresstype_t addresstype;
  80         int port;
  81         union
  82         {
  83                 struct sockaddr sock;
  84                 struct sockaddr_in in;
  85                 struct sockaddr_in6 in6;
  86         }
  87         addr;
  88 }
  89 lhnetaddressnative_t;
  90
  91 // to make LHNETADDRESS_FromString resolve repeated hostnames faster, cache them
  92 #define MAX_NAMECACHE 64
  93 static struct namecache_s
  94 {
  95         lhnetaddressnative_t address;
  96         double expirationtime;
  97         char name[64];
  98 }
  99 namecache[MAX_NAMECACHE];
 100 static int namecacheposition = 0;
 101
 102 int LHNETADDRESS_FromPort(lhnetaddress_t *vaddress, lhnetaddresstype_t addresstype, int port)
 103 {
 104         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 105         if (!address)
 106                 return 0;
 107         switch(addresstype)
 108         {
 109         default:
 110                 return 0;
 111         case LHNETADDRESSTYPE_LOOP:
 112                 // local:port  (loopback)
 113                 memset(address, 0, sizeof(*address));
 114                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 115                 address->port = port;
 116                 return 1;
 117         case LHNETADDRESSTYPE_INET4:
 118                 // 0.0.0.0:port  (INADDR_ANY, binds to all interfaces)
 119                 memset(address, 0, sizeof(*address));
 120                 address->addresstype = LHNETADDRESSTYPE_INET4;
 121                 address->port = port;
 122                 address->addr.in.sin_family = AF_INET;
 123                 address->addr.in.sin_port = htons((unsigned short)port);
 124                 return 1;
 125         case LHNETADDRESSTYPE_INET6:
 126                 // [0:0:0:0:0:0:0:0]:port  (IN6ADDR_ANY, binds to all interfaces)
 127                 memset(address, 0, sizeof(*address));
 128                 address->addresstype = LHNETADDRESSTYPE_INET6;
 129                 address->port = port;
 130                 address->addr.in6.sin6_family = AF_INET6;
 131                 address->addr.in6.sin6_port = htons((unsigned short)port);
 132                 return 1;
 133         }
 134         return 0;
 135 }
 136
 137 int LHNETADDRESS_Resolve(lhnetaddressnative_t *address, const char *name, int port)
 138 {
 139         char port_buff [16];
 140         struct addrinfo hints;
 141         struct addrinfo* addrinf;
 142         int err;
 143
 144         dpsnprintf (port_buff, sizeof (port_buff), "%d", port);
 145         port_buff[sizeof (port_buff) - 1] = '\0';
 146
 147         memset(&hints, 0, sizeof (hints));
 148         hints.ai_family = AF_UNSPEC;
 149         hints.ai_socktype = SOCK_DGRAM;
 150         //hints.ai_flags = AI_PASSIVE;
 151
 152         err = getaddrinfo(name, port_buff, &hints, &addrinf);
 153         if (err != 0 || addrinf == NULL)
 154                 return 0;
 155         if (addrinf->ai_addr->sa_family != AF_INET6 && addrinf->ai_addr->sa_family != AF_INET)
 156         {
 157                 freeaddrinfo (addrinf);
 158                 return 0;
 159         }
 160
 161         // great it worked
 162         if (addrinf->ai_addr->sa_family == AF_INET6)
 163         {
 164                 address->addresstype = LHNETADDRESSTYPE_INET6;
 165                 memcpy(&address->addr.in6, addrinf->ai_addr, sizeof(address->addr.in6));
 166         }
 167         else
 168         {
 169                 address->addresstype = LHNETADDRESSTYPE_INET4;
 170                 memcpy(&address->addr.in, addrinf->ai_addr, sizeof(address->addr.in));
 171         }
 172         address->port = port;
 173
 174         freeaddrinfo (addrinf);
 175         return 1;
 176 }
 177
 178 int LHNETADDRESS_FromString(lhnetaddress_t *vaddress, const char *string, int defaultport)
 179 {
 180         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 181         int i, port, d1, d2, d3, d4, resolved;
 182         size_t namelen;
 183         unsigned char *a;
 184         char name[128];
 185 #ifdef STANDALONETEST
 186         char string2[128];
 187 #endif
 188         const char* addr_start;
 189         const char* addr_end = NULL;
 190         const char* port_name = NULL;
 191         int addr_family = AF_UNSPEC;
 192
 193         if (!address || !string || !*string)
 194                 return 0;
 195         memset(address, 0, sizeof(*address));
 196         address->addresstype = LHNETADDRESSTYPE_NONE;
 197         port = 0;
 198
 199         // If it's a bracketed IPv6 address
 200         if (string[0] == '[')
 201         {
 202                 const char* end_bracket = strchr(string, ']');
 203
 204                 if (end_bracket == NULL)
 205                         return 0;
 206
 207                 if (end_bracket[1] == ':')
 208                         port_name = end_bracket + 2;
 209                 else if (end_bracket[1] != '\0')
 210                         return 0;
 211
 212                 addr_family = AF_INET6;
 213                 addr_start = &string[1];
 214                 addr_end = end_bracket;
 215         }
 216         else
 217         {
 218                 const char* first_colon;
 219
 220                 addr_start = string;
 221
 222                 // If it's a numeric non-bracket IPv6 address (-> no port),
 223                 // or it's a numeric IPv4 address, or a name, with a port
 224                 first_colon = strchr(string, ':');
 225                 if (first_colon != NULL)
 226                 {
 227                         const char* last_colon = strrchr(first_colon + 1, ':');
 228
 229                         // If it's an numeric IPv4 address, or a name, with a port
 230                         if (last_colon == NULL)
 231                         {
 232                                 addr_end = first_colon;
 233                                 port_name = first_colon + 1;
 234                         }
 235                         else
 236                                 addr_family = AF_INET6;
 237                 }
 238         }
 239
 240         if (addr_end != NULL)
 241                 namelen = addr_end - addr_start;
 242         else
 243                 namelen = strlen (addr_start);
 244
 245         if (namelen >= sizeof(name))
 246                 namelen = sizeof(name) - 1;
 247         memcpy (name, addr_start, namelen);
 248         name[namelen] = 0;
 249
 250         if (port_name)
 251                 port = atoi(port_name);
 252
 253         if (port == 0)
 254                 port = defaultport;
 255
 256         // handle loopback
 257         if (!strcmp(name, "local"))
 258         {
 259                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 260                 address->port = port;
 261                 return 1;
 262         }
 263         // try to parse as dotted decimal ipv4 address first
 264         // note this supports partial ip addresses
 265         d1 = d2 = d3 = d4 = 0;
 266 #if _MSC_VER >= 1400
 267 #define sscanf sscanf_s
 268 #endif
 269         if (addr_family != AF_INET6 &&
 270                 sscanf(name, "%d.%d.%d.%d", &d1, &d2, &d3, &d4) >= 1 && (unsigned int)d1 < 256 && (unsigned int)d2 < 256 && (unsigned int)d3 < 256 && (unsigned int)d4 < 256)
 271         {
 272                 // parsed a valid ipv4 address
 273                 address->addresstype = LHNETADDRESSTYPE_INET4;
 274                 address->port = port;
 275                 address->addr.in.sin_family = AF_INET;
 276                 address->addr.in.sin_port = htons((unsigned short)port);
 277                 a = (unsigned char *)&address->addr.in.sin_addr;
 278                 a[0] = d1;
 279                 a[1] = d2;
 280                 a[2] = d3;
 281                 a[3] = d4;
 282 #ifdef STANDALONETEST
 283                 LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
 284                 printf("manual parsing of ipv4 dotted decimal address \"%s\" successful: %s\n", string, string2);
 285 #endif
 286                 return 1;
 287         }
 288         for (i = 0;i < MAX_NAMECACHE;i++)
 289                 if (!strcmp(namecache[i].name, name))
 290                         break;
 291 #ifdef STANDALONETEST
 292         if (i < MAX_NAMECACHE)
 293 #else
 294         if (i < MAX_NAMECACHE && realtime < namecache[i].expirationtime)
 295 #endif
 296         {
 297                 *address = namecache[i].address;
 298                 address->port = port;
 299                 if (address->addresstype == LHNETADDRESSTYPE_INET6)
 300                 {
 301                         address->addr.in6.sin6_port = htons((unsigned short)port);
 302                         return 1;
 303                 }
 304                 else if (address->addresstype == LHNETADDRESSTYPE_INET4)
 305                 {
 306                         address->addr.in.sin_port = htons((unsigned short)port);
 307                         return 1;
 308                 }
 309                 return 0;
 310         }
 311
 312         for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
 313                 namecache[namecacheposition].name[i] = name[i];
 314         namecache[namecacheposition].name[i] = 0;
 315 #ifndef STANDALONETEST
 316         namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
 317 #endif
 318
 319         // try resolving the address (handles dns and other ip formats)
 320         resolved = LHNETADDRESS_Resolve(address, name, port);
 321         if (resolved)
 322         {
 323 #ifdef STANDALONETEST
 324                 const char *protoname;
 325
 326                 switch (address->addresstype)
 327                 {
 328                         case LHNETADDRESSTYPE_INET6:
 329                                 protoname = "ipv6";
 330                                 break;
 331                         case LHNETADDRESSTYPE_INET4:
 332                                 protoname = "ipv4";
 333                                 break;
 334                         default:
 335                                 protoname = "UNKNOWN";
 336                                 break;
 337                 }
 338                 LHNETADDRESS_ToString(vaddress, string2, sizeof(string2), 1);
 339                 Con_Printf("LHNETADDRESS_Resolve(\"%s\") returned %s address %s\n", string, protoname, string2);
 340 #endif
 341                 namecache[namecacheposition].address = *address;
 342         }
 343         else
 344         {
 345 #ifdef STANDALONETEST
 346                 printf("name resolution failed on address \"%s\"\n", name);
 347 #endif
 348                 namecache[namecacheposition].address.addresstype = LHNETADDRESSTYPE_NONE;
 349         }
 350
 351         namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
 352         return resolved;
 353 }
 354
 355 int LHNETADDRESS_ToString(const lhnetaddress_t *vaddress, char *string, int stringbuffersize, int includeport)
 356 {
 357         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 358         const unsigned char *a;
 359         *string = 0;
 360         if (!address || !string || stringbuffersize < 1)
 361                 return 0;
 362         switch(address->addresstype)
 363         {
 364         default:
 365                 break;
 366         case LHNETADDRESSTYPE_LOOP:
 367                 if (includeport)
 368                 {
 369                         if (stringbuffersize >= 12)
 370                         {
 371                                 dpsnprintf(string, stringbuffersize, "local:%d", address->port);
 372                                 return 1;
 373                         }
 374                 }
 375                 else
 376                 {
 377                         if (stringbuffersize >= 6)
 378                         {
 379                                 memcpy(string, "local", 6);
 380                                 return 1;
 381                         }
 382                 }
 383                 break;
 384         case LHNETADDRESSTYPE_INET4:
 385                 a = (const unsigned char *)(&address->addr.in.sin_addr);
 386                 if (includeport)
 387                 {
 388                         if (stringbuffersize >= 22)
 389                         {
 390                                 dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d:%d", a[0], a[1], a[2], a[3], address->port);
 391                                 return 1;
 392                         }
 393                 }
 394                 else
 395                 {
 396                         if (stringbuffersize >= 16)
 397                         {
 398                                 dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
 399                                 return 1;
 400                         }
 401                 }
 402                 break;
 403         case LHNETADDRESSTYPE_INET6:
 404                 a = (const unsigned char *)(&address->addr.in6.sin6_addr);
 405                 if (includeport)
 406                 {
 407                         if (stringbuffersize >= 88)
 408                         {
 409                                 dpsnprintf(string, stringbuffersize, "[%x:%x:%x:%x:%x:%x:%x:%x]:%d", a[0] * 256 + a[1], a[2] * 256 + a[3], a[4] * 256 + a[5], a[6] * 256 + a[7], a[8] * 256 + a[9], a[10] * 256 + a[11], a[12] * 256 + a[13], a[14] * 256 + a[15], address->port);
 410                                 return 1;
 411                         }
 412                 }
 413                 else
 414                 {
 415                         if (stringbuffersize >= 80)
 416                         {
 417                                 dpsnprintf(string, stringbuffersize, "%x:%x:%x:%x:%x:%x:%x:%x", a[0] * 256 + a[1], a[2] * 256 + a[3], a[4] * 256 + a[5], a[6] * 256 + a[7], a[8] * 256 + a[9], a[10] * 256 + a[11], a[12] * 256 + a[13], a[14] * 256 + a[15]);
 418                                 return 1;
 419                         }
 420                 }
 421                 break;
 422         }
 423         return 0;
 424 }
 425
 426 int LHNETADDRESS_GetAddressType(const lhnetaddress_t *address)
 427 {
 428         if (address)
 429                 return address->addresstype;
 430         else
 431                 return LHNETADDRESSTYPE_NONE;
 432 }
 433
 434 const char *LHNETADDRESS_GetInterfaceName(const lhnetaddress_t *vaddress)
 435 {
 436         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 437
 438         if (address && address->addresstype == LHNETADDRESSTYPE_INET6)
 439         {
 440 #ifndef _WIN32
 441
 442                 static char ifname [IF_NAMESIZE];
 443
 444                 if (if_indextoname(address->addr.in6.sin6_scope_id, ifname) == ifname)
 445                         return ifname;
 446
 447 #else
 448
 449                 // The Win32 API doesn't have if_indextoname() until Windows Vista,
 450                 // but luckily it just uses the interface ID as the interface name
 451
 452                 static char ifname [16];
 453
 454                 if (dpsnprintf(ifname, sizeof(ifname), "%lu", address->addr.in6.sin6_scope_id) > 0)
 455                         return ifname;
 456
 457 #endif
 458         }
 459
 460         return NULL;
 461 }
 462
 463 int LHNETADDRESS_GetPort(const lhnetaddress_t *address)
 464 {
 465         if (!address)
 466                 return -1;
 467         return address->port;
 468 }
 469
 470 int LHNETADDRESS_SetPort(lhnetaddress_t *vaddress, int port)
 471 {
 472         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 473         if (!address)
 474                 return 0;
 475         address->port = port;
 476         switch(address->addresstype)
 477         {
 478         case LHNETADDRESSTYPE_LOOP:
 479                 return 1;
 480         case LHNETADDRESSTYPE_INET4:
 481                 address->addr.in.sin_port = htons((unsigned short)port);
 482                 return 1;
 483         case LHNETADDRESSTYPE_INET6:
 484                 address->addr.in6.sin6_port = htons((unsigned short)port);
 485                 return 1;
 486         default:
 487                 return 0;
 488         }
 489 }
 490
 491 int LHNETADDRESS_Compare(const lhnetaddress_t *vaddress1, const lhnetaddress_t *vaddress2)
 492 {
 493         lhnetaddressnative_t *address1 = (lhnetaddressnative_t *)vaddress1;
 494         lhnetaddressnative_t *address2 = (lhnetaddressnative_t *)vaddress2;
 495         if (!address1 || !address2)
 496                 return 1;
 497         if (address1->addresstype != address2->addresstype)
 498                 return 1;
 499         switch(address1->addresstype)
 500         {
 501         case LHNETADDRESSTYPE_LOOP:
 502                 if (address1->port != address2->port)
 503                         return -1;
 504                 return 0;
 505         case LHNETADDRESSTYPE_INET4:
 506                 if (address1->addr.in.sin_family != address2->addr.in.sin_family)
 507                         return 1;
 508                 if (memcmp(&address1->addr.in.sin_addr, &address2->addr.in.sin_addr, sizeof(address1->addr.in.sin_addr)))
 509                         return 1;
 510                 if (address1->port != address2->port)
 511                         return -1;
 512                 return 0;
 513         case LHNETADDRESSTYPE_INET6:
 514                 if (address1->addr.in6.sin6_family != address2->addr.in6.sin6_family)
 515                         return 1;
 516                 if (memcmp(&address1->addr.in6.sin6_addr, &address2->addr.in6.sin6_addr, sizeof(address1->addr.in6.sin6_addr)))
 517                         return 1;
 518                 if (address1->port != address2->port)
 519                         return -1;
 520                 return 0;
 521         default:
 522                 return 1;
 523         }
 524 }
 525
 526 typedef struct lhnetpacket_s
 527 {
 528         void *data;
 529         int length;
 530         int sourceport;
 531         int destinationport;
 532         time_t timeout;
 533 #ifndef STANDALONETEST
 534         double sentdoubletime;
 535 #endif
 536         struct lhnetpacket_s *next, *prev;
 537 }
 538 lhnetpacket_t;
 539
 540 static int lhnet_active;
 541 static lhnetsocket_t lhnet_socketlist;
 542 static lhnetpacket_t lhnet_packetlist;
 543 #ifdef WIN32
 544 static int lhnet_didWSAStartup = 0;
 545 static WSADATA lhnet_winsockdata;
 546 #endif
 547
 548 void LHNET_Init(void)
 549 {
 550         if (lhnet_active)
 551                 return;
 552         lhnet_socketlist.next = lhnet_socketlist.prev = &lhnet_socketlist;
 553         lhnet_packetlist.next = lhnet_packetlist.prev = &lhnet_packetlist;
 554         lhnet_active = 1;
 555 #ifdef WIN32
 556         lhnet_didWSAStartup = !WSAStartup(MAKEWORD(1, 1), &lhnet_winsockdata);
 557         if (!lhnet_didWSAStartup)
 558                 Con_Print("LHNET_Init: WSAStartup failed, networking disabled\n");
 559 #endif
 560 }
 561
 562 void LHNET_Shutdown(void)
 563 {
 564         lhnetpacket_t *p;
 565         if (!lhnet_active)
 566                 return;
 567         while (lhnet_socketlist.next != &lhnet_socketlist)
 568                 LHNET_CloseSocket(lhnet_socketlist.next);
 569         while (lhnet_packetlist.next != &lhnet_packetlist)
 570         {
 571                 p = lhnet_packetlist.next;
 572                 p->prev->next = p->next;
 573                 p->next->prev = p->prev;
 574                 Z_Free(p);
 575         }
 576 #ifdef WIN32
 577         if (lhnet_didWSAStartup)
 578         {
 579                 lhnet_didWSAStartup = 0;
 580                 WSACleanup();
 581         }
 582 #endif
 583         lhnet_active = 0;
 584 }
 585
 586 static const char *LHNETPRIVATE_StrError(void)
 587 {
 588 #ifdef WIN32
 589         int i = WSAGetLastError();
 590         switch (i)
 591         {
 592                 case WSAEINTR:           return "WSAEINTR";
 593                 case WSAEBADF:           return "WSAEBADF";
 594                 case WSAEACCES:          return "WSAEACCES";
 595                 case WSAEFAULT:          return "WSAEFAULT";
 596                 case WSAEINVAL:          return "WSAEINVAL";
 597                 case WSAEMFILE:          return "WSAEMFILE";
 598                 case WSAEWOULDBLOCK:     return "WSAEWOULDBLOCK";
 599                 case WSAEINPROGRESS:     return "WSAEINPROGRESS";
 600                 case WSAEALREADY:        return "WSAEALREADY";
 601                 case WSAENOTSOCK:        return "WSAENOTSOCK";
 602                 case WSAEDESTADDRREQ:    return "WSAEDESTADDRREQ";
 603                 case WSAEMSGSIZE:        return "WSAEMSGSIZE";
 604                 case WSAEPROTOTYPE:      return "WSAEPROTOTYPE";
 605                 case WSAENOPROTOOPT:     return "WSAENOPROTOOPT";
 606                 case WSAEPROTONOSUPPORT: return "WSAEPROTONOSUPPORT";
 607                 case WSAESOCKTNOSUPPORT: return "WSAESOCKTNOSUPPORT";
 608                 case WSAEOPNOTSUPP:      return "WSAEOPNOTSUPP";
 609                 case WSAEPFNOSUPPORT:    return "WSAEPFNOSUPPORT";
 610                 case WSAEAFNOSUPPORT:    return "WSAEAFNOSUPPORT";
 611                 case WSAEADDRINUSE:      return "WSAEADDRINUSE";
 612                 case WSAEADDRNOTAVAIL:   return "WSAEADDRNOTAVAIL";
 613                 case WSAENETDOWN:        return "WSAENETDOWN";
 614                 case WSAENETUNREACH:     return "WSAENETUNREACH";
 615                 case WSAENETRESET:       return "WSAENETRESET";
 616                 case WSAECONNABORTED:    return "WSAECONNABORTED";
 617                 case WSAECONNRESET:      return "WSAECONNRESET";
 618                 case WSAENOBUFS:         return "WSAENOBUFS";
 619                 case WSAEISCONN:         return "WSAEISCONN";
 620                 case WSAENOTCONN:        return "WSAENOTCONN";
 621                 case WSAESHUTDOWN:       return "WSAESHUTDOWN";
 622                 case WSAETOOMANYREFS:    return "WSAETOOMANYREFS";
 623                 case WSAETIMEDOUT:       return "WSAETIMEDOUT";
 624                 case WSAECONNREFUSED:    return "WSAECONNREFUSED";
 625                 case WSAELOOP:           return "WSAELOOP";
 626                 case WSAENAMETOOLONG:    return "WSAENAMETOOLONG";
 627                 case WSAEHOSTDOWN:       return "WSAEHOSTDOWN";
 628                 case WSAEHOSTUNREACH:    return "WSAEHOSTUNREACH";
 629                 case WSAENOTEMPTY:       return "WSAENOTEMPTY";
 630                 case WSAEPROCLIM:        return "WSAEPROCLIM";
 631                 case WSAEUSERS:          return "WSAEUSERS";
 632                 case WSAEDQUOT:          return "WSAEDQUOT";
 633                 case WSAESTALE:          return "WSAESTALE";
 634                 case WSAEREMOTE:         return "WSAEREMOTE";
 635                 case WSAEDISCON:         return "WSAEDISCON";
 636                 case 0:                  return "no error";
 637                 default:                 return "unknown WSAE error";
 638         }
 639 #else
 640         return strerror(errno);
 641 #endif
 642 }
 643
 644 void LHNET_SleepUntilPacket_Microseconds(int microseconds)
 645 {
 646         fd_set fdreadset;
 647         struct timeval tv;
 648         int lastfd;
 649         lhnetsocket_t *s;
 650         FD_ZERO(&fdreadset);
 651         lastfd = 0;
 652         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 653         {
 654                 if (s->address.addresstype == LHNETADDRESSTYPE_INET4 || s->address.addresstype == LHNETADDRESSTYPE_INET6)
 655                 {
 656                         if (lastfd < s->inetsocket)
 657                                 lastfd = s->inetsocket;
 658                         FD_SET((unsigned int)s->inetsocket, &fdreadset);
 659                 }
 660         }
 661         tv.tv_sec = microseconds / 1000000;
 662         tv.tv_usec = microseconds % 1000000;
 663         select(lastfd + 1, &fdreadset, NULL, NULL, &tv);
 664 }
 665
 666 lhnetsocket_t *LHNET_OpenSocket_Connectionless(lhnetaddress_t *address)
 667 {
 668         lhnetsocket_t *lhnetsocket, *s;
 669         if (!address)
 670                 return NULL;
 671         lhnetsocket = (lhnetsocket_t *)Z_Malloc(sizeof(*lhnetsocket));
 672         if (lhnetsocket)
 673         {
 674                 memset(lhnetsocket, 0, sizeof(*lhnetsocket));
 675                 lhnetsocket->address = *address;
 676                 switch(lhnetsocket->address.addresstype)
 677                 {
 678                 case LHNETADDRESSTYPE_LOOP:
 679                         if (lhnetsocket->address.port == 0)
 680                         {
 681                                 // allocate a port dynamically
 682                                 // this search will always terminate because there is never
 683                                 // an allocated socket with port 0, so if the number wraps it
 684                                 // will find the port is unused, and then refuse to use port
 685                                 // 0, causing an intentional failure condition
 686                                 lhnetsocket->address.port = 1024;
 687                                 for (;;)
 688                                 {
 689                                         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 690                                                 if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
 691                                                         break;
 692                                         if (s == &lhnet_socketlist)
 693                                                 break;
 694                                         lhnetsocket->address.port++;
 695                                 }
 696                         }
 697                         // check if the port is available
 698                         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 699                                 if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
 700                                         break;
 701                         if (s == &lhnet_socketlist && lhnetsocket->address.port != 0)
 702                         {
 703                                 lhnetsocket->next = &lhnet_socketlist;
 704                                 lhnetsocket->prev = lhnetsocket->next->prev;
 705                                 lhnetsocket->next->prev = lhnetsocket;
 706                                 lhnetsocket->prev->next = lhnetsocket;
 707                                 return lhnetsocket;
 708                         }
 709                         break;
 710                 case LHNETADDRESSTYPE_INET4:
 711                 case LHNETADDRESSTYPE_INET6:
 712 #ifdef WIN32
 713                         if (lhnet_didWSAStartup)
 714                         {
 715 #endif
 716                                 if ((lhnetsocket->inetsocket = socket(address->addresstype == LHNETADDRESSTYPE_INET6 ? PF_INET6 : PF_INET, SOCK_DGRAM, IPPROTO_UDP)) != -1)
 717                                 {
 718 #ifdef WIN32
 719                                         u_long _true = 1;
 720                                         u_long _false = 0;
 721 #else
 722                                         char _true = 1;
 723 #endif
 724                                         if (ioctlsocket(lhnetsocket->inetsocket, FIONBIO, &_true) != -1)
 725                                         {
 726 #ifdef IPV6_V6ONLY
 727                                                 // We need to set this flag to tell the OS that we only listen on IPv6. If we don't
 728                                                 // most OSes will create a dual-protocol socket that also listens on IPv4. In this case
 729                                                 // if an IPv4 socket is already bound to the port we want, our bind() call will fail.
 730                                                 int ipv6_only = 1;
 731                                                 if (address->addresstype != LHNETADDRESSTYPE_INET6
 732                                                         || setsockopt (lhnetsocket->inetsocket, IPPROTO_IPV6, IPV6_V6ONLY,
 733                                                                                    (const char *)&ipv6_only, sizeof(ipv6_only)) == 0
 734 #ifdef WIN32
 735                                                         // The Win32 API only supports IPV6_V6ONLY since Windows Vista, but fortunately
 736                                                         // the default value is what we want on Win32 anyway (IPV6_V6ONLY = true)
 737                                                         || SOCKETERRNO == WSAENOPROTOOPT
 738 #endif
 739                                                         )
 740 #endif
 741                                                 {
 742                                                         lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
 743                                                         SOCKLEN_T namelen;
 744                                                         int bindresult;
 745                                                         if (address->addresstype == LHNETADDRESSTYPE_INET6)
 746                                                         {
 747                                                                 namelen = sizeof(localaddress->addr.in6);
 748                                                                 bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
 749                                                                 if (bindresult != -1)
 750                                                                         getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
 751                                                         }
 752                                                         else
 753                                                         {
 754                                                                 namelen = sizeof(localaddress->addr.in);
 755                                                                 bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
 756                                                                 if (bindresult != -1)
 757                                                                         getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
 758                                                         }
 759                                                         if (bindresult != -1)
 760                                                         {
 761                                                                 int i = 1;
 762                                                                 // enable broadcast on this socket
 763                                                                 setsockopt(lhnetsocket->inetsocket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i));
 764                                                                 lhnetsocket->next = &lhnet_socketlist;
 765                                                                 lhnetsocket->prev = lhnetsocket->next->prev;
 766                                                                 lhnetsocket->next->prev = lhnetsocket;
 767                                                                 lhnetsocket->prev->next = lhnetsocket;
 768 #ifdef WIN32
 769                                                                 if (ioctlsocket(lhnetsocket->inetsocket, SIO_UDP_CONNRESET, &_false) == -1)
 770                                                                         Con_DPrintf("LHNET_OpenSocket_Connectionless: ioctlsocket SIO_UDP_CONNRESET returned error: %s\n", LHNETPRIVATE_StrError());
 771 #endif
 772                                                                 return lhnetsocket;
 773                                                         }
 774                                                         else
 775                                                                 Con_Printf("LHNET_OpenSocket_Connectionless: bind returned error: %s\n", LHNETPRIVATE_StrError());
 776                                                 }
 777 #ifdef IPV6_V6ONLY
 778                                                 else
 779                                                         Con_Printf("LHNET_OpenSocket_Connectionless: setsockopt(IPV6_V6ONLY) returned error: %s\n", LHNETPRIVATE_StrError());
 780 #endif
 781                                         }
 782                                         else
 783                                                 Con_Printf("LHNET_OpenSocket_Connectionless: ioctlsocket returned error: %s\n", LHNETPRIVATE_StrError());
 784                                         closesocket(lhnetsocket->inetsocket);
 785                                 }
 786                                 else
 787                                         Con_Printf("LHNET_OpenSocket_Connectionless: socket returned error: %s\n", LHNETPRIVATE_StrError());
 788 #ifdef WIN32
 789                         }
 790                         else
 791                                 Con_Print("LHNET_OpenSocket_Connectionless: can't open a socket (WSAStartup failed during LHNET_Init)\n");
 792 #endif
 793                         break;
 794                 default:
 795                         break;
 796                 }
 797                 Z_Free(lhnetsocket);
 798         }
 799         return NULL;
 800 }
 801
 802 void LHNET_CloseSocket(lhnetsocket_t *lhnetsocket)
 803 {
 804         if (lhnetsocket)
 805         {
 806                 // unlink from socket list
 807                 if (lhnetsocket->next == NULL)
 808                         return; // invalid!
 809                 lhnetsocket->next->prev = lhnetsocket->prev;
 810                 lhnetsocket->prev->next = lhnetsocket->next;
 811                 lhnetsocket->next = NULL;
 812                 lhnetsocket->prev = NULL;
 813
 814                 // no special close code for loopback, just inet
 815                 if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4 || lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 816                 {
 817                         closesocket(lhnetsocket->inetsocket);
 818                 }
 819                 Z_Free(lhnetsocket);
 820         }
 821 }
 822
 823 lhnetaddress_t *LHNET_AddressFromSocket(lhnetsocket_t *sock)
 824 {
 825         if (sock)
 826                 return &sock->address;
 827         else
 828                 return NULL;
 829 }
 830
 831 int LHNET_Read(lhnetsocket_t *lhnetsocket, void *content, int maxcontentlength, lhnetaddress_t *vaddress)
 832 {
 833         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 834         int value = 0;
 835         if (!lhnetsocket || !address || !content || maxcontentlength < 1)
 836                 return -1;
 837         if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
 838         {
 839                 time_t currenttime;
 840                 lhnetpacket_t *p, *pnext;
 841                 // scan for any old packets to timeout while searching for a packet
 842                 // that is waiting to be delivered to this socket
 843                 currenttime = time(NULL);
 844                 for (p = lhnet_packetlist.next;p != &lhnet_packetlist;p = pnext)
 845                 {
 846                         pnext = p->next;
 847                         if (p->timeout < currenttime)
 848                         {
 849                                 // unlink and free
 850                                 p->next->prev = p->prev;
 851                                 p->prev->next = p->next;
 852                                 Z_Free(p);
 853                                 continue;
 854                         }
 855 #ifndef STANDALONETEST
 856                         if (cl_netlocalping.value && (realtime - cl_netlocalping.value * (1.0 / 2000.0)) < p->sentdoubletime)
 857                                 continue;
 858 #endif
 859                         if (value == 0 && p->destinationport == lhnetsocket->address.port)
 860                         {
 861                                 if (p->length <= maxcontentlength)
 862                                 {
 863                                         lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
 864                                         *address = *localaddress;
 865                                         address->port = p->sourceport;
 866                                         memcpy(content, p->data, p->length);
 867                                         value = p->length;
 868                                 }
 869                                 else
 870                                         value = -1;
 871                                 // unlink and free
 872                                 p->next->prev = p->prev;
 873                                 p->prev->next = p->next;
 874                                 Z_Free(p);
 875                         }
 876                 }
 877         }
 878         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
 879         {
 880                 SOCKLEN_T inetaddresslength;
 881                 address->addresstype = LHNETADDRESSTYPE_NONE;
 882                 inetaddresslength = sizeof(address->addr.in);
 883                 value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, 0, &address->addr.sock, &inetaddresslength);
 884                 if (value > 0)
 885                 {
 886                         address->addresstype = LHNETADDRESSTYPE_INET4;
 887                         address->port = ntohs(address->addr.in.sin_port);
 888                         return value;
 889                 }
 890                 else if (value == -1)
 891                 {
 892                         int e = SOCKETERRNO;
 893                         if (e == EWOULDBLOCK)
 894                                 return 0;
 895                         switch (e)
 896                         {
 897                                 case ECONNREFUSED:
 898                                         Con_Print("Connection refused\n");
 899                                         return 0;
 900                         }
 901                         Con_Printf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
 902                 }
 903         }
 904         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 905         {
 906                 SOCKLEN_T inetaddresslength;
 907                 address->addresstype = LHNETADDRESSTYPE_NONE;
 908                 inetaddresslength = sizeof(address->addr.in6);
 909                 value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, 0, &address->addr.sock, &inetaddresslength);
 910                 if (value > 0)
 911                 {
 912                         address->addresstype = LHNETADDRESSTYPE_INET6;
 913                         address->port = ntohs(address->addr.in6.sin6_port);
 914                         return value;
 915                 }
 916                 else if (value == -1)
 917                 {
 918                         int e = SOCKETERRNO;
 919                         if (e == EWOULDBLOCK)
 920                                 return 0;
 921                         switch (e)
 922                         {
 923                                 case ECONNREFUSED:
 924                                         Con_Print("Connection refused\n");
 925                                         return 0;
 926                         }
 927                         Con_Printf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
 928                 }
 929         }
 930         return value;
 931 }
 932
 933 int LHNET_Write(lhnetsocket_t *lhnetsocket, const void *content, int contentlength, const lhnetaddress_t *vaddress)
 934 {
 935         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 936         int value = -1;
 937         if (!lhnetsocket || !address || !content || contentlength < 1)
 938                 return -1;
 939         if (lhnetsocket->address.addresstype != address->addresstype)
 940                 return -1;
 941         if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
 942         {
 943                 lhnetpacket_t *p;
 944                 p = (lhnetpacket_t *)Z_Malloc(sizeof(*p) + contentlength);
 945                 p->data = (void *)(p + 1);
 946                 memcpy(p->data, content, contentlength);
 947                 p->length = contentlength;
 948                 p->sourceport = lhnetsocket->address.port;
 949                 p->destinationport = address->port;
 950                 p->timeout = time(NULL) + 10;
 951                 p->next = &lhnet_packetlist;
 952                 p->prev = p->next->prev;
 953                 p->next->prev = p;
 954                 p->prev->next = p;
 955 #ifndef STANDALONETEST
 956                 p->sentdoubletime = realtime;
 957 #endif
 958                 value = contentlength;
 959         }
 960         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
 961         {
 962                 value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in, sizeof(struct sockaddr_in));
 963                 if (value == -1)
 964                 {
 965                         if (SOCKETERRNO == EWOULDBLOCK)
 966                                 return 0;
 967                         Con_Printf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
 968                 }
 969         }
 970         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 971         {
 972                 value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in6, sizeof(struct sockaddr_in6));
 973                 if (value == -1)
 974                 {
 975                         if (SOCKETERRNO == EWOULDBLOCK)
 976                                 return 0;
 977                         Con_Printf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
 978                 }
 979         }
 980         return value;
 981 }
 982
 983 #ifdef STANDALONETEST
 984 int main(int argc, char **argv)
 985 {
 986 #if 1
 987         char *buffer = "test", buffer2[1024];
 988         int blen = strlen(buffer);
 989         int b2len = 1024;
 990         lhnetsocket_t *sock1;
 991         lhnetsocket_t *sock2;
 992         lhnetaddress_t myaddy1;
 993         lhnetaddress_t myaddy2;
 994         lhnetaddress_t myaddy3;
 995         lhnetaddress_t localhostaddy1;
 996         lhnetaddress_t localhostaddy2;
 997         int test1;
 998         int test2;
 999
1000         printf("calling LHNET_Init\n");
1001         LHNET_Init();
1002
1003         printf("calling LHNET_FromPort twice to create two local addresses\n");
1004         LHNETADDRESS_FromPort(&myaddy1, LHNETADDRESSTYPE_INET4, 4000);
1005         LHNETADDRESS_FromPort(&myaddy2, LHNETADDRESSTYPE_INET4, 4001);
1006         LHNETADDRESS_FromString(&localhostaddy1, "127.0.0.1", 4000);
1007         LHNETADDRESS_FromString(&localhostaddy2, "127.0.0.1", 4001);
1008
1009         printf("calling LHNET_OpenSocket_Connectionless twice to create two local sockets\n");
1010         sock1 = LHNET_OpenSocket_Connectionless(&myaddy1);
1011         sock2 = LHNET_OpenSocket_Connectionless(&myaddy2);
1012
1013         printf("calling LHNET_Write to send a packet from the first socket to the second socket\n");
1014         test1 = LHNET_Write(sock1, buffer, blen, &localhostaddy2);
1015         printf("sleeping briefly\n");
1016 #ifdef WIN32
1017         Sleep (100);
1018 #else
1019         usleep (100000);
1020 #endif
1021         printf("calling LHNET_Read on the second socket to read the packet sent from the first socket\n");
1022         test2 = LHNET_Read(sock2, buffer2, b2len - 1, &myaddy3);
1023         if (test2 > 0)
1024                 Con_Printf("socket to socket test succeeded\n");
1025         else
1026                 Con_Printf("socket to socket test failed\n");
1027
1028 #ifdef WIN32
1029         printf("press any key to exit\n");
1030         getchar();
1031 #endif
1032
1033         printf("calling LHNET_Shutdown\n");
1034         LHNET_Shutdown();
1035         printf("exiting\n");
1036         return 0;
1037 #else
1038         lhnetsocket_t *sock[16], *sendsock;
1039         int i;
1040         int numsockets;
1041         int count;
1042         int length;
1043         int port;
1044         time_t oldtime;
1045         time_t newtime;
1046         char *sendmessage;
1047         int sendmessagelength;
1048         lhnetaddress_t destaddress;
1049         lhnetaddress_t receiveaddress;
1050         lhnetaddress_t sockaddress[16];
1051         char buffer[1536], addressstring[128], addressstring2[128];
1052         if ((argc == 2 || argc == 5) && (port = atoi(argv[1])) >= 1 && port < 65535)
1053         {
1054                 printf("calling LHNET_Init()\n");
1055                 LHNET_Init();
1056
1057                 numsockets = 0;
1058                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_LOOP, port);
1059                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET4, port);
1060                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET6, port+1);
1061
1062                 sendsock = NULL;
1063                 sendmessage = NULL;
1064                 sendmessagelength = 0;
1065
1066                 for (i = 0;i < numsockets;i++)
1067                 {
1068                         LHNETADDRESS_ToString(&sockaddress[i], addressstring, sizeof(addressstring), 1);
1069                         printf("calling LHNET_OpenSocket_Connectionless(<%s>)\n", addressstring);
1070                         if ((sock[i] = LHNET_OpenSocket_Connectionless(&sockaddress[i])))
1071                         {
1072                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1073                                 printf("opened socket successfully (address \"%s\")\n", addressstring2);
1074                         }
1075                         else
1076                         {
1077                                 printf("failed to open socket\n");
1078                                 if (i == 0)
1079                                 {
1080                                         LHNET_Shutdown();
1081                                         return -1;
1082                                 }
1083                         }
1084                 }
1085                 count = 0;
1086                 if (argc == 5)
1087                 {
1088                         count = atoi(argv[2]);
1089                         if (LHNETADDRESS_FromString(&destaddress, argv[3], -1))
1090                         {
1091                                 sendmessage = argv[4];
1092                                 sendmessagelength = strlen(sendmessage);
1093                                 sendsock = NULL;
1094                                 for (i = 0;i < numsockets;i++)
1095                                         if (sock[i] && LHNETADDRESS_GetAddressType(&destaddress) == LHNETADDRESS_GetAddressType(&sockaddress[i]))
1096                                                 sendsock = sock[i];
1097                                 if (sendsock == NULL)
1098                                 {
1099                                         printf("Could not find an open socket matching the addresstype (%i) of destination address, switching to listen only mode\n", LHNETADDRESS_GetAddressType(&destaddress));
1100                                         argc = 2;
1101                                 }
1102                         }
1103                         else
1104                         {
1105                                 printf("LHNETADDRESS_FromString did not like the address \"%s\", switching to listen only mode\n", argv[3]);
1106                                 argc = 2;
1107                         }
1108                 }
1109                 printf("started, now listening for \"exit\" on the opened sockets\n");
1110                 oldtime = time(NULL);
1111                 for(;;)
1112                 {
1113 #ifdef WIN32
1114                         Sleep(1);
1115 #else
1116                         usleep(1);
1117 #endif
1118                         for (i = 0;i < numsockets;i++)
1119                         {
1120                                 if (sock[i])
1121                                 {
1122                                         length = LHNET_Read(sock[i], buffer, sizeof(buffer), &receiveaddress);
1123                                         if (length < 0)
1124                                                 printf("localsock read error: length < 0");
1125                                         else if (length > 0 && length < (int)sizeof(buffer))
1126                                         {
1127                                                 buffer[length] = 0;
1128                                                 LHNETADDRESS_ToString(&receiveaddress, addressstring, sizeof(addressstring), 1);
1129                                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1130                                                 printf("received message \"%s\" from \"%s\" on socket \"%s\"\n", buffer, addressstring, addressstring2);
1131                                                 if (!strcmp(buffer, "exit"))
1132                                                         break;
1133                                         }
1134                                 }
1135                         }
1136                         if (i < numsockets)
1137                                 break;
1138                         if (argc == 5 && count > 0)
1139                         {
1140                                 newtime = time(NULL);
1141                                 if (newtime != oldtime)
1142                                 {
1143                                         LHNETADDRESS_ToString(&destaddress, addressstring, sizeof(addressstring), 1);
1144                                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(sendsock), addressstring2, sizeof(addressstring2), 1);
1145                                         printf("calling LHNET_Write(<%s>, \"%s\", %i, <%s>)\n", addressstring2, sendmessage, sendmessagelength, addressstring);
1146                                         length = LHNET_Write(sendsock, sendmessage, sendmessagelength, &destaddress);
1147                                         if (length == sendmessagelength)
1148                                                 printf("sent successfully\n");
1149                                         else
1150                                                 printf("LH_Write failed, returned %i (length of message was %i)\n", length, strlen(argv[4]));
1151                                         oldtime = newtime;
1152                                         count--;
1153                                         if (count <= 0)
1154                                                 printf("Done sending, still listening for \"exit\"\n");
1155                                 }
1156                         }
1157                 }
1158                 for (i = 0;i < numsockets;i++)
1159                 {
1160                         if (sock[i])
1161                         {
1162                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1163                                 printf("calling LHNET_CloseSocket(<%s>)\n", addressstring2);
1164                                 LHNET_CloseSocket(sock[i]);
1165                         }
1166                 }
1167                 printf("calling LHNET_Shutdown()\n");
1168                 LHNET_Shutdown();
1169                 return 0;
1170         }
1171         printf("Testing code for lhnet.c\nusage: lhnettest <localportnumber> [<sendnumberoftimes> <sendaddress:port> <sendmessage>]\n");
1172         return -1;
1173 #endif
1174 }
1175 #endif
1176