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 # ifdef USE_WSPIAPI_H
   9 #  include <wspiapi.h>
  10 # else
  11 #  include <ws2tcpip.h>
  12 # endif
  13 #endif
  14
  15 #ifndef STANDALONETEST
  16 #include "quakedef.h"
  17 #endif
  18
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <time.h>
  22 #include <string.h>
  23 #ifndef WIN32
  24 #include <unistd.h>
  25 #include <sys/types.h>
  26 #include <sys/socket.h>
  27 #include <sys/ioctl.h>
  28 #include <errno.h>
  29 #include <netdb.h>
  30 #include <netinet/in.h>
  31 #include <arpa/inet.h>
  32 #include <net/if.h>
  33 #endif
  34
  35 #ifdef __MORPHOS__
  36 #include <proto/socket.h>
  37 #endif
  38
  39 // for Z_Malloc/Z_Free in quake
  40 #ifndef STANDALONETEST
  41 #include "zone.h"
  42 #include "sys.h"
  43 #include "netconn.h"
  44 #else
  45 #define Con_Print printf
  46 #define Con_Printf printf
  47 #define Z_Malloc malloc
  48 #define Z_Free free
  49 #endif
  50
  51 #include "lhnet.h"
  52
  53 #if defined(WIN32)
  54 #define EWOULDBLOCK WSAEWOULDBLOCK
  55 #define ECONNREFUSED WSAECONNREFUSED
  56
  57 #define SOCKETERRNO WSAGetLastError()
  58
  59 #define IOC_VENDOR 0x18000000
  60 #define _WSAIOW(x,y) (IOC_IN|(x)|(y))
  61 #define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12)
  62
  63 #define SOCKLEN_T int
  64 #elif defined(__MORPHOS__)
  65 #define ioctlsocket IoctlSocket
  66 #define closesocket CloseSocket
  67 #define SOCKETERRNO Errno()
  68
  69 #define SOCKLEN_T int
  70 #else
  71 #define ioctlsocket ioctl
  72 #define closesocket close
  73 #define SOCKETERRNO errno
  74
  75 #define SOCKLEN_T socklen_t
  76 #endif
  77
  78 typedef struct lhnetaddressnative_s
  79 {
  80         lhnetaddresstype_t addresstype;
  81         int port;
  82         union
  83         {
  84                 struct sockaddr sock;
  85                 struct sockaddr_in in;
  86                 struct sockaddr_in6 in6;
  87         }
  88         addr;
  89 }
  90 lhnetaddressnative_t;
  91
  92 // to make LHNETADDRESS_FromString resolve repeated hostnames faster, cache them
  93 #define MAX_NAMECACHE 64
  94 static struct namecache_s
  95 {
  96         lhnetaddressnative_t address;
  97         double expirationtime;
  98         char name[64];
  99 }
 100 namecache[MAX_NAMECACHE];
 101 static int namecacheposition = 0;
 102
 103 int LHNETADDRESS_FromPort(lhnetaddress_t *vaddress, lhnetaddresstype_t addresstype, int port)
 104 {
 105         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 106         if (!address)
 107                 return 0;
 108         switch(addresstype)
 109         {
 110         default:
 111                 return 0;
 112         case LHNETADDRESSTYPE_LOOP:
 113                 // local:port  (loopback)
 114                 memset(address, 0, sizeof(*address));
 115                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 116                 address->port = port;
 117                 return 1;
 118         case LHNETADDRESSTYPE_INET4:
 119                 // 0.0.0.0:port  (INADDR_ANY, binds to all interfaces)
 120                 memset(address, 0, sizeof(*address));
 121                 address->addresstype = LHNETADDRESSTYPE_INET4;
 122                 address->port = port;
 123                 address->addr.in.sin_family = AF_INET;
 124                 address->addr.in.sin_port = htons((unsigned short)port);
 125                 return 1;
 126         case LHNETADDRESSTYPE_INET6:
 127                 // [0:0:0:0:0:0:0:0]:port  (IN6ADDR_ANY, binds to all interfaces)
 128                 memset(address, 0, sizeof(*address));
 129                 address->addresstype = LHNETADDRESSTYPE_INET6;
 130                 address->port = port;
 131                 address->addr.in6.sin6_family = AF_INET6;
 132                 address->addr.in6.sin6_port = htons((unsigned short)port);
 133                 return 1;
 134         }
 135         return 0;
 136 }
 137
 138 int LHNETADDRESS_Resolve(lhnetaddressnative_t *address, const char *name, int port)
 139 {
 140         char port_buff [16];
 141         struct addrinfo hints;
 142         struct addrinfo* addrinf;
 143         int err;
 144
 145         dpsnprintf (port_buff, sizeof (port_buff), "%d", port);
 146         port_buff[sizeof (port_buff) - 1] = '\0';
 147
 148         memset(&hints, 0, sizeof (hints));
 149         hints.ai_family = AF_UNSPEC;
 150         hints.ai_socktype = SOCK_DGRAM;
 151         //hints.ai_flags = AI_PASSIVE;
 152
 153         err = getaddrinfo(name, port_buff, &hints, &addrinf);
 154         if (err != 0 || addrinf == NULL)
 155                 return 0;
 156         if (addrinf->ai_addr->sa_family != AF_INET6 && addrinf->ai_addr->sa_family != AF_INET)
 157         {
 158                 freeaddrinfo (addrinf);
 159                 return 0;
 160         }
 161
 162         // great it worked
 163         if (addrinf->ai_addr->sa_family == AF_INET6)
 164         {
 165                 address->addresstype = LHNETADDRESSTYPE_INET6;
 166                 memcpy(&address->addr.in6, addrinf->ai_addr, sizeof(address->addr.in6));
 167         }
 168         else
 169         {
 170                 address->addresstype = LHNETADDRESSTYPE_INET4;
 171                 memcpy(&address->addr.in, addrinf->ai_addr, sizeof(address->addr.in));
 172         }
 173         address->port = port;
 174
 175         freeaddrinfo (addrinf);
 176         return 1;
 177 }
 178
 179 int LHNETADDRESS_FromString(lhnetaddress_t *vaddress, const char *string, int defaultport)
 180 {
 181         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 182         int i, port, d1, d2, d3, d4, resolved;
 183         size_t namelen;
 184         unsigned char *a;
 185         char name[128];
 186 #ifdef STANDALONETEST
 187         char string2[128];
 188 #endif
 189         const char* addr_start;
 190         const char* addr_end = NULL;
 191         const char* port_name = NULL;
 192         int addr_family = AF_UNSPEC;
 193
 194         if (!address || !string || !*string)
 195                 return 0;
 196         memset(address, 0, sizeof(*address));
 197         address->addresstype = LHNETADDRESSTYPE_NONE;
 198         port = 0;
 199
 200         // If it's a bracketed IPv6 address
 201         if (string[0] == '[')
 202         {
 203                 const char* end_bracket = strchr(string, ']');
 204
 205                 if (end_bracket == NULL)
 206                         return 0;
 207
 208                 if (end_bracket[1] == ':')
 209                         port_name = end_bracket + 2;
 210                 else if (end_bracket[1] != '\0')
 211                         return 0;
 212
 213                 addr_family = AF_INET6;
 214                 addr_start = &string[1];
 215                 addr_end = end_bracket;
 216         }
 217         else
 218         {
 219                 const char* first_colon;
 220
 221                 addr_start = string;
 222
 223                 // If it's a numeric non-bracket IPv6 address (-> no port),
 224                 // or it's a numeric IPv4 address, or a name, with a port
 225                 first_colon = strchr(string, ':');
 226                 if (first_colon != NULL)
 227                 {
 228                         const char* last_colon = strrchr(first_colon + 1, ':');
 229
 230                         // If it's an numeric IPv4 address, or a name, with a port
 231                         if (last_colon == NULL)
 232                         {
 233                                 addr_end = first_colon;
 234                                 port_name = first_colon + 1;
 235                         }
 236                         else
 237                                 addr_family = AF_INET6;
 238                 }
 239         }
 240
 241         if (addr_end != NULL)
 242                 namelen = addr_end - addr_start;
 243         else
 244                 namelen = strlen (addr_start);
 245
 246         if (namelen >= sizeof(name))
 247                 namelen = sizeof(name) - 1;
 248         memcpy (name, addr_start, namelen);
 249         name[namelen] = 0;
 250
 251         if (port_name)
 252                 port = atoi(port_name);
 253
 254         if (port == 0)
 255                 port = defaultport;
 256
 257         // handle loopback
 258         if (!strcmp(name, "local"))
 259         {
 260                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 261                 address->port = port;
 262                 return 1;
 263         }
 264         // try to parse as dotted decimal ipv4 address first
 265         // note this supports partial ip addresses
 266         d1 = d2 = d3 = d4 = 0;
 267 #if _MSC_VER >= 1400
 268 #define sscanf sscanf_s
 269 #endif
 270         if (addr_family != AF_INET6 &&
 271                 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)
 272         {
 273                 // parsed a valid ipv4 address
 274                 address->addresstype = LHNETADDRESSTYPE_INET4;
 275                 address->port = port;
 276                 address->addr.in.sin_family = AF_INET;
 277                 address->addr.in.sin_port = htons((unsigned short)port);
 278                 a = (unsigned char *)&address->addr.in.sin_addr;
 279                 a[0] = d1;
 280                 a[1] = d2;
 281                 a[2] = d3;
 282                 a[3] = d4;
 283 #ifdef STANDALONETEST
 284                 LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
 285                 printf("manual parsing of ipv4 dotted decimal address \"%s\" successful: %s\n", string, string2);
 286 #endif
 287                 return 1;
 288         }
 289         for (i = 0;i < MAX_NAMECACHE;i++)
 290                 if (!strcmp(namecache[i].name, name))
 291                         break;
 292 #ifdef STANDALONETEST
 293         if (i < MAX_NAMECACHE)
 294 #else
 295         if (i < MAX_NAMECACHE && realtime < namecache[i].expirationtime)
 296 #endif
 297         {
 298                 *address = namecache[i].address;
 299                 address->port = port;
 300                 if (address->addresstype == LHNETADDRESSTYPE_INET6)
 301                 {
 302                         address->addr.in6.sin6_port = htons((unsigned short)port);
 303                         return 1;
 304                 }
 305                 else if (address->addresstype == LHNETADDRESSTYPE_INET4)
 306                 {
 307                         address->addr.in.sin_port = htons((unsigned short)port);
 308                         return 1;
 309                 }
 310                 return 0;
 311         }
 312
 313         for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
 314                 namecache[namecacheposition].name[i] = name[i];
 315         namecache[namecacheposition].name[i] = 0;
 316 #ifndef STANDALONETEST
 317         namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
 318 #endif
 319
 320         // try resolving the address (handles dns and other ip formats)
 321         resolved = LHNETADDRESS_Resolve(address, name, port);
 322         if (resolved)
 323         {
 324 #ifdef STANDALONETEST
 325                 const char *protoname;
 326
 327                 switch (address->addresstype)
 328                 {
 329                         case LHNETADDRESSTYPE_INET6:
 330                                 protoname = "ipv6";
 331                                 break;
 332                         case LHNETADDRESSTYPE_INET4:
 333                                 protoname = "ipv4";
 334                                 break;
 335                         default:
 336                                 protoname = "UNKNOWN";
 337                                 break;
 338                 }
 339                 LHNETADDRESS_ToString(vaddress, string2, sizeof(string2), 1);
 340                 Con_Printf("LHNETADDRESS_Resolve(\"%s\") returned %s address %s\n", string, protoname, string2);
 341 #endif
 342                 namecache[namecacheposition].address = *address;
 343         }
 344         else
 345         {
 346 #ifdef STANDALONETEST
 347                 printf("name resolution failed on address \"%s\"\n", name);
 348 #endif
 349                 namecache[namecacheposition].address.addresstype = LHNETADDRESSTYPE_NONE;
 350         }
 351
 352         namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
 353         return resolved;
 354 }
 355
 356 int LHNETADDRESS_ToString(const lhnetaddress_t *vaddress, char *string, int stringbuffersize, int includeport)
 357 {
 358         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 359         const unsigned char *a;
 360         *string = 0;
 361         if (!address || !string || stringbuffersize < 1)
 362                 return 0;
 363         switch(address->addresstype)
 364         {
 365         default:
 366                 break;
 367         case LHNETADDRESSTYPE_LOOP:
 368                 if (includeport)
 369                 {
 370                         if (stringbuffersize >= 12)
 371                         {
 372                                 dpsnprintf(string, stringbuffersize, "local:%d", address->port);
 373                                 return 1;
 374                         }
 375                 }
 376                 else
 377                 {
 378                         if (stringbuffersize >= 6)
 379                         {
 380                                 memcpy(string, "local", 6);
 381                                 return 1;
 382                         }
 383                 }
 384                 break;
 385         case LHNETADDRESSTYPE_INET4:
 386                 a = (const unsigned char *)(&address->addr.in.sin_addr);
 387                 if (includeport)
 388                 {
 389                         if (stringbuffersize >= 22)
 390                         {
 391                                 dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d:%d", a[0], a[1], a[2], a[3], address->port);
 392                                 return 1;
 393                         }
 394                 }
 395                 else
 396                 {
 397                         if (stringbuffersize >= 16)
 398                         {
 399                                 dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
 400                                 return 1;
 401                         }
 402                 }
 403                 break;
 404         case LHNETADDRESSTYPE_INET6:
 405                 a = (const unsigned char *)(&address->addr.in6.sin6_addr);
 406                 if (includeport)
 407                 {
 408                         if (stringbuffersize >= 88)
 409                         {
 410                                 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);
 411                                 return 1;
 412                         }
 413                 }
 414                 else
 415                 {
 416                         if (stringbuffersize >= 80)
 417                         {
 418                                 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]);
 419                                 return 1;
 420                         }
 421                 }
 422                 break;
 423         }
 424         return 0;
 425 }
 426
 427 int LHNETADDRESS_GetAddressType(const lhnetaddress_t *address)
 428 {
 429         if (address)
 430                 return address->addresstype;
 431         else
 432                 return LHNETADDRESSTYPE_NONE;
 433 }
 434
 435 const char *LHNETADDRESS_GetInterfaceName(const lhnetaddress_t *vaddress)
 436 {
 437         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 438
 439         if (address && address->addresstype == LHNETADDRESSTYPE_INET6)
 440         {
 441 #ifndef _WIN32
 442
 443                 static char ifname [IF_NAMESIZE];
 444
 445                 if (if_indextoname(address->addr.in6.sin6_scope_id, ifname) == ifname)
 446                         return ifname;
 447
 448 #else
 449
 450                 // The Win32 API doesn't have if_indextoname() until Windows Vista,
 451                 // but luckily it just uses the interface ID as the interface name
 452
 453                 static char ifname [16];
 454
 455                 if (dpsnprintf(ifname, sizeof(ifname), "%lu", address->addr.in6.sin6_scope_id) > 0)
 456                         return ifname;
 457
 458 #endif
 459         }
 460
 461         return NULL;
 462 }
 463
 464 int LHNETADDRESS_GetPort(const lhnetaddress_t *address)
 465 {
 466         if (!address)
 467                 return -1;
 468         return address->port;
 469 }
 470
 471 int LHNETADDRESS_SetPort(lhnetaddress_t *vaddress, int port)
 472 {
 473         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 474         if (!address)
 475                 return 0;
 476         address->port = port;
 477         switch(address->addresstype)
 478         {
 479         case LHNETADDRESSTYPE_LOOP:
 480                 return 1;
 481         case LHNETADDRESSTYPE_INET4:
 482                 address->addr.in.sin_port = htons((unsigned short)port);
 483                 return 1;
 484         case LHNETADDRESSTYPE_INET6:
 485                 address->addr.in6.sin6_port = htons((unsigned short)port);
 486                 return 1;
 487         default:
 488                 return 0;
 489         }
 490 }
 491
 492 int LHNETADDRESS_Compare(const lhnetaddress_t *vaddress1, const lhnetaddress_t *vaddress2)
 493 {
 494         lhnetaddressnative_t *address1 = (lhnetaddressnative_t *)vaddress1;
 495         lhnetaddressnative_t *address2 = (lhnetaddressnative_t *)vaddress2;
 496         if (!address1 || !address2)
 497                 return 1;
 498         if (address1->addresstype != address2->addresstype)
 499                 return 1;
 500         switch(address1->addresstype)
 501         {
 502         case LHNETADDRESSTYPE_LOOP:
 503                 if (address1->port != address2->port)
 504                         return -1;
 505                 return 0;
 506         case LHNETADDRESSTYPE_INET4:
 507                 if (address1->addr.in.sin_family != address2->addr.in.sin_family)
 508                         return 1;
 509                 if (memcmp(&address1->addr.in.sin_addr, &address2->addr.in.sin_addr, sizeof(address1->addr.in.sin_addr)))
 510                         return 1;
 511                 if (address1->port != address2->port)
 512                         return -1;
 513                 return 0;
 514         case LHNETADDRESSTYPE_INET6:
 515                 if (address1->addr.in6.sin6_family != address2->addr.in6.sin6_family)
 516                         return 1;
 517                 if (memcmp(&address1->addr.in6.sin6_addr, &address2->addr.in6.sin6_addr, sizeof(address1->addr.in6.sin6_addr)))
 518                         return 1;
 519                 if (address1->port != address2->port)
 520                         return -1;
 521                 return 0;
 522         default:
 523                 return 1;
 524         }
 525 }
 526
 527 typedef struct lhnetpacket_s
 528 {
 529         void *data;
 530         int length;
 531         int sourceport;
 532         int destinationport;
 533         time_t timeout;
 534 #ifndef STANDALONETEST
 535         double sentdoubletime;
 536 #endif
 537         struct lhnetpacket_s *next, *prev;
 538 }
 539 lhnetpacket_t;
 540
 541 static int lhnet_active;
 542 static lhnetsocket_t lhnet_socketlist;
 543 static lhnetpacket_t lhnet_packetlist;
 544 #ifdef WIN32
 545 static int lhnet_didWSAStartup = 0;
 546 static WSADATA lhnet_winsockdata;
 547 #endif
 548
 549 void LHNET_Init(void)
 550 {
 551         if (lhnet_active)
 552                 return;
 553         lhnet_socketlist.next = lhnet_socketlist.prev = &lhnet_socketlist;
 554         lhnet_packetlist.next = lhnet_packetlist.prev = &lhnet_packetlist;
 555         lhnet_active = 1;
 556 #ifdef WIN32
 557         lhnet_didWSAStartup = !WSAStartup(MAKEWORD(1, 1), &lhnet_winsockdata);
 558         if (!lhnet_didWSAStartup)
 559                 Con_Print("LHNET_Init: WSAStartup failed, networking disabled\n");
 560 #endif
 561 }
 562
 563 void LHNET_Shutdown(void)
 564 {
 565         lhnetpacket_t *p;
 566         if (!lhnet_active)
 567                 return;
 568         while (lhnet_socketlist.next != &lhnet_socketlist)
 569                 LHNET_CloseSocket(lhnet_socketlist.next);
 570         while (lhnet_packetlist.next != &lhnet_packetlist)
 571         {
 572                 p = lhnet_packetlist.next;
 573                 p->prev->next = p->next;
 574                 p->next->prev = p->prev;
 575                 Z_Free(p);
 576         }
 577 #ifdef WIN32
 578         if (lhnet_didWSAStartup)
 579         {
 580                 lhnet_didWSAStartup = 0;
 581                 WSACleanup();
 582         }
 583 #endif
 584         lhnet_active = 0;
 585 }
 586
 587 static const char *LHNETPRIVATE_StrError(void)
 588 {
 589 #ifdef WIN32
 590         int i = WSAGetLastError();
 591         switch (i)
 592         {
 593                 case WSAEINTR:           return "WSAEINTR";
 594                 case WSAEBADF:           return "WSAEBADF";
 595                 case WSAEACCES:          return "WSAEACCES";
 596                 case WSAEFAULT:          return "WSAEFAULT";
 597                 case WSAEINVAL:          return "WSAEINVAL";
 598                 case WSAEMFILE:          return "WSAEMFILE";
 599                 case WSAEWOULDBLOCK:     return "WSAEWOULDBLOCK";
 600                 case WSAEINPROGRESS:     return "WSAEINPROGRESS";
 601                 case WSAEALREADY:        return "WSAEALREADY";
 602                 case WSAENOTSOCK:        return "WSAENOTSOCK";
 603                 case WSAEDESTADDRREQ:    return "WSAEDESTADDRREQ";
 604                 case WSAEMSGSIZE:        return "WSAEMSGSIZE";
 605                 case WSAEPROTOTYPE:      return "WSAEPROTOTYPE";
 606                 case WSAENOPROTOOPT:     return "WSAENOPROTOOPT";
 607                 case WSAEPROTONOSUPPORT: return "WSAEPROTONOSUPPORT";
 608                 case WSAESOCKTNOSUPPORT: return "WSAESOCKTNOSUPPORT";
 609                 case WSAEOPNOTSUPP:      return "WSAEOPNOTSUPP";
 610                 case WSAEPFNOSUPPORT:    return "WSAEPFNOSUPPORT";
 611                 case WSAEAFNOSUPPORT:    return "WSAEAFNOSUPPORT";
 612                 case WSAEADDRINUSE:      return "WSAEADDRINUSE";
 613                 case WSAEADDRNOTAVAIL:   return "WSAEADDRNOTAVAIL";
 614                 case WSAENETDOWN:        return "WSAENETDOWN";
 615                 case WSAENETUNREACH:     return "WSAENETUNREACH";
 616                 case WSAENETRESET:       return "WSAENETRESET";
 617                 case WSAECONNABORTED:    return "WSAECONNABORTED";
 618                 case WSAECONNRESET:      return "WSAECONNRESET";
 619                 case WSAENOBUFS:         return "WSAENOBUFS";
 620                 case WSAEISCONN:         return "WSAEISCONN";
 621                 case WSAENOTCONN:        return "WSAENOTCONN";
 622                 case WSAESHUTDOWN:       return "WSAESHUTDOWN";
 623                 case WSAETOOMANYREFS:    return "WSAETOOMANYREFS";
 624                 case WSAETIMEDOUT:       return "WSAETIMEDOUT";
 625                 case WSAECONNREFUSED:    return "WSAECONNREFUSED";
 626                 case WSAELOOP:           return "WSAELOOP";
 627                 case WSAENAMETOOLONG:    return "WSAENAMETOOLONG";
 628                 case WSAEHOSTDOWN:       return "WSAEHOSTDOWN";
 629                 case WSAEHOSTUNREACH:    return "WSAEHOSTUNREACH";
 630                 case WSAENOTEMPTY:       return "WSAENOTEMPTY";
 631                 case WSAEPROCLIM:        return "WSAEPROCLIM";
 632                 case WSAEUSERS:          return "WSAEUSERS";
 633                 case WSAEDQUOT:          return "WSAEDQUOT";
 634                 case WSAESTALE:          return "WSAESTALE";
 635                 case WSAEREMOTE:         return "WSAEREMOTE";
 636                 case WSAEDISCON:         return "WSAEDISCON";
 637                 case 0:                  return "no error";
 638                 default:                 return "unknown WSAE error";
 639         }
 640 #else
 641         return strerror(errno);
 642 #endif
 643 }
 644
 645 void LHNET_SleepUntilPacket_Microseconds(int microseconds)
 646 {
 647         fd_set fdreadset;
 648         struct timeval tv;
 649         int lastfd;
 650         lhnetsocket_t *s;
 651         FD_ZERO(&fdreadset);
 652         lastfd = 0;
 653         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 654         {
 655                 if (s->address.addresstype == LHNETADDRESSTYPE_INET4 || s->address.addresstype == LHNETADDRESSTYPE_INET6)
 656                 {
 657                         if (lastfd < s->inetsocket)
 658                                 lastfd = s->inetsocket;
 659                         FD_SET((unsigned int)s->inetsocket, &fdreadset);
 660                 }
 661         }
 662         tv.tv_sec = microseconds / 1000000;
 663         tv.tv_usec = microseconds % 1000000;
 664         select(lastfd + 1, &fdreadset, NULL, NULL, &tv);
 665 }
 666
 667 lhnetsocket_t *LHNET_OpenSocket_Connectionless(lhnetaddress_t *address)
 668 {
 669         lhnetsocket_t *lhnetsocket, *s;
 670         if (!address)
 671                 return NULL;
 672         lhnetsocket = (lhnetsocket_t *)Z_Malloc(sizeof(*lhnetsocket));
 673         if (lhnetsocket)
 674         {
 675                 memset(lhnetsocket, 0, sizeof(*lhnetsocket));
 676                 lhnetsocket->address = *address;
 677                 switch(lhnetsocket->address.addresstype)
 678                 {
 679                 case LHNETADDRESSTYPE_LOOP:
 680                         if (lhnetsocket->address.port == 0)
 681                         {
 682                                 // allocate a port dynamically
 683                                 // this search will always terminate because there is never
 684                                 // an allocated socket with port 0, so if the number wraps it
 685                                 // will find the port is unused, and then refuse to use port
 686                                 // 0, causing an intentional failure condition
 687                                 lhnetsocket->address.port = 1024;
 688                                 for (;;)
 689                                 {
 690                                         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 691                                                 if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
 692                                                         break;
 693                                         if (s == &lhnet_socketlist)
 694                                                 break;
 695                                         lhnetsocket->address.port++;
 696                                 }
 697                         }
 698                         // check if the port is available
 699                         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 700                                 if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
 701                                         break;
 702                         if (s == &lhnet_socketlist && lhnetsocket->address.port != 0)
 703                         {
 704                                 lhnetsocket->next = &lhnet_socketlist;
 705                                 lhnetsocket->prev = lhnetsocket->next->prev;
 706                                 lhnetsocket->next->prev = lhnetsocket;
 707                                 lhnetsocket->prev->next = lhnetsocket;
 708                                 return lhnetsocket;
 709                         }
 710                         break;
 711                 case LHNETADDRESSTYPE_INET4:
 712                 case LHNETADDRESSTYPE_INET6:
 713 #ifdef WIN32
 714                         if (lhnet_didWSAStartup)
 715                         {
 716 #endif
 717                                 if ((lhnetsocket->inetsocket = socket(address->addresstype == LHNETADDRESSTYPE_INET6 ? PF_INET6 : PF_INET, SOCK_DGRAM, IPPROTO_UDP)) != -1)
 718                                 {
 719 #ifdef WIN32
 720                                         u_long _true = 1;
 721                                         u_long _false = 0;
 722 #else
 723                                         char _true = 1;
 724 #endif
 725                                         if (ioctlsocket(lhnetsocket->inetsocket, FIONBIO, &_true) != -1)
 726                                         {
 727 #ifdef IPV6_V6ONLY
 728                                                 // We need to set this flag to tell the OS that we only listen on IPv6. If we don't
 729                                                 // most OSes will create a dual-protocol socket that also listens on IPv4. In this case
 730                                                 // if an IPv4 socket is already bound to the port we want, our bind() call will fail.
 731                                                 int ipv6_only = 1;
 732                                                 if (address->addresstype != LHNETADDRESSTYPE_INET6
 733                                                         || setsockopt (lhnetsocket->inetsocket, IPPROTO_IPV6, IPV6_V6ONLY,
 734                                                                                    (const char *)&ipv6_only, sizeof(ipv6_only)) == 0
 735 #ifdef WIN32
 736                                                         // The Win32 API only supports IPV6_V6ONLY since Windows Vista, but fortunately
 737                                                         // the default value is what we want on Win32 anyway (IPV6_V6ONLY = true)
 738                                                         || SOCKETERRNO == WSAENOPROTOOPT
 739 #endif
 740                                                         )
 741 #endif
 742                                                 {
 743                                                         lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
 744                                                         SOCKLEN_T namelen;
 745                                                         int bindresult;
 746                                                         if (address->addresstype == LHNETADDRESSTYPE_INET6)
 747                                                         {
 748                                                                 namelen = sizeof(localaddress->addr.in6);
 749                                                                 bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
 750                                                                 if (bindresult != -1)
 751                                                                         getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
 752                                                         }
 753                                                         else
 754                                                         {
 755                                                                 namelen = sizeof(localaddress->addr.in);
 756                                                                 bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
 757                                                                 if (bindresult != -1)
 758                                                                         getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
 759                                                         }
 760                                                         if (bindresult != -1)
 761                                                         {
 762                                                                 int i = 1;
 763                                                                 // enable broadcast on this socket
 764                                                                 setsockopt(lhnetsocket->inetsocket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i));
 765                                                                 lhnetsocket->next = &lhnet_socketlist;
 766                                                                 lhnetsocket->prev = lhnetsocket->next->prev;
 767                                                                 lhnetsocket->next->prev = lhnetsocket;
 768                                                                 lhnetsocket->prev->next = lhnetsocket;
 769 #ifdef WIN32
 770                                                                 if (ioctlsocket(lhnetsocket->inetsocket, SIO_UDP_CONNRESET, &_false) == -1)
 771                                                                         Con_DPrintf("LHNET_OpenSocket_Connectionless: ioctlsocket SIO_UDP_CONNRESET returned error: %s\n", LHNETPRIVATE_StrError());
 772 #endif
 773                                                                 return lhnetsocket;
 774                                                         }
 775                                                         else
 776                                                                 Con_Printf("LHNET_OpenSocket_Connectionless: bind returned error: %s\n", LHNETPRIVATE_StrError());
 777                                                 }
 778 #ifdef IPV6_V6ONLY
 779                                                 else
 780                                                         Con_Printf("LHNET_OpenSocket_Connectionless: setsockopt(IPV6_V6ONLY) returned error: %s\n", LHNETPRIVATE_StrError());
 781 #endif
 782                                         }
 783                                         else
 784                                                 Con_Printf("LHNET_OpenSocket_Connectionless: ioctlsocket returned error: %s\n", LHNETPRIVATE_StrError());
 785                                         closesocket(lhnetsocket->inetsocket);
 786                                 }
 787                                 else
 788                                         Con_Printf("LHNET_OpenSocket_Connectionless: socket returned error: %s\n", LHNETPRIVATE_StrError());
 789 #ifdef WIN32
 790                         }
 791                         else
 792                                 Con_Print("LHNET_OpenSocket_Connectionless: can't open a socket (WSAStartup failed during LHNET_Init)\n");
 793 #endif
 794                         break;
 795                 default:
 796                         break;
 797                 }
 798                 Z_Free(lhnetsocket);
 799         }
 800         return NULL;
 801 }
 802
 803 void LHNET_CloseSocket(lhnetsocket_t *lhnetsocket)
 804 {
 805         if (lhnetsocket)
 806         {
 807                 // unlink from socket list
 808                 if (lhnetsocket->next == NULL)
 809                         return; // invalid!
 810                 lhnetsocket->next->prev = lhnetsocket->prev;
 811                 lhnetsocket->prev->next = lhnetsocket->next;
 812                 lhnetsocket->next = NULL;
 813                 lhnetsocket->prev = NULL;
 814
 815                 // no special close code for loopback, just inet
 816                 if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4 || lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 817                 {
 818                         closesocket(lhnetsocket->inetsocket);
 819                 }
 820                 Z_Free(lhnetsocket);
 821         }
 822 }
 823
 824 lhnetaddress_t *LHNET_AddressFromSocket(lhnetsocket_t *sock)
 825 {
 826         if (sock)
 827                 return &sock->address;
 828         else
 829                 return NULL;
 830 }
 831
 832 int LHNET_Read(lhnetsocket_t *lhnetsocket, void *content, int maxcontentlength, lhnetaddress_t *vaddress)
 833 {
 834         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 835         int value = 0;
 836         if (!lhnetsocket || !address || !content || maxcontentlength < 1)
 837                 return -1;
 838         if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
 839         {
 840                 time_t currenttime;
 841                 lhnetpacket_t *p, *pnext;
 842                 // scan for any old packets to timeout while searching for a packet
 843                 // that is waiting to be delivered to this socket
 844                 currenttime = time(NULL);
 845                 for (p = lhnet_packetlist.next;p != &lhnet_packetlist;p = pnext)
 846                 {
 847                         pnext = p->next;
 848                         if (p->timeout < currenttime)
 849                         {
 850                                 // unlink and free
 851                                 p->next->prev = p->prev;
 852                                 p->prev->next = p->next;
 853                                 Z_Free(p);
 854                                 continue;
 855                         }
 856 #ifndef STANDALONETEST
 857                         if (cl_netlocalping.value && (realtime - cl_netlocalping.value * (1.0 / 2000.0)) < p->sentdoubletime)
 858                                 continue;
 859 #endif
 860                         if (value == 0 && p->destinationport == lhnetsocket->address.port)
 861                         {
 862                                 if (p->length <= maxcontentlength)
 863                                 {
 864                                         lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
 865                                         *address = *localaddress;
 866                                         address->port = p->sourceport;
 867                                         memcpy(content, p->data, p->length);
 868                                         value = p->length;
 869                                 }
 870                                 else
 871                                         value = -1;
 872                                 // unlink and free
 873                                 p->next->prev = p->prev;
 874                                 p->prev->next = p->next;
 875                                 Z_Free(p);
 876                         }
 877                 }
 878         }
 879         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
 880         {
 881                 SOCKLEN_T inetaddresslength;
 882                 address->addresstype = LHNETADDRESSTYPE_NONE;
 883                 inetaddresslength = sizeof(address->addr.in);
 884                 value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, 0, &address->addr.sock, &inetaddresslength);
 885                 if (value > 0)
 886                 {
 887                         address->addresstype = LHNETADDRESSTYPE_INET4;
 888                         address->port = ntohs(address->addr.in.sin_port);
 889                         return value;
 890                 }
 891                 else if (value == -1)
 892                 {
 893                         int e = SOCKETERRNO;
 894                         if (e == EWOULDBLOCK)
 895                                 return 0;
 896                         switch (e)
 897                         {
 898                                 case ECONNREFUSED:
 899                                         Con_Print("Connection refused\n");
 900                                         return 0;
 901                         }
 902                         Con_Printf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
 903                 }
 904         }
 905         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 906         {
 907                 SOCKLEN_T inetaddresslength;
 908                 address->addresstype = LHNETADDRESSTYPE_NONE;
 909                 inetaddresslength = sizeof(address->addr.in6);
 910                 value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, 0, &address->addr.sock, &inetaddresslength);
 911                 if (value > 0)
 912                 {
 913                         address->addresstype = LHNETADDRESSTYPE_INET6;
 914                         address->port = ntohs(address->addr.in6.sin6_port);
 915                         return value;
 916                 }
 917                 else if (value == -1)
 918                 {
 919                         int e = SOCKETERRNO;
 920                         if (e == EWOULDBLOCK)
 921                                 return 0;
 922                         switch (e)
 923                         {
 924                                 case ECONNREFUSED:
 925                                         Con_Print("Connection refused\n");
 926                                         return 0;
 927                         }
 928                         Con_Printf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
 929                 }
 930         }
 931         return value;
 932 }
 933
 934 int LHNET_Write(lhnetsocket_t *lhnetsocket, const void *content, int contentlength, const lhnetaddress_t *vaddress)
 935 {
 936         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 937         int value = -1;
 938         if (!lhnetsocket || !address || !content || contentlength < 1)
 939                 return -1;
 940         if (lhnetsocket->address.addresstype != address->addresstype)
 941                 return -1;
 942         if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
 943         {
 944                 lhnetpacket_t *p;
 945                 p = (lhnetpacket_t *)Z_Malloc(sizeof(*p) + contentlength);
 946                 p->data = (void *)(p + 1);
 947                 memcpy(p->data, content, contentlength);
 948                 p->length = contentlength;
 949                 p->sourceport = lhnetsocket->address.port;
 950                 p->destinationport = address->port;
 951                 p->timeout = time(NULL) + 10;
 952                 p->next = &lhnet_packetlist;
 953                 p->prev = p->next->prev;
 954                 p->next->prev = p;
 955                 p->prev->next = p;
 956 #ifndef STANDALONETEST
 957                 p->sentdoubletime = realtime;
 958 #endif
 959                 value = contentlength;
 960         }
 961         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
 962         {
 963                 value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in, sizeof(struct sockaddr_in));
 964                 if (value == -1)
 965                 {
 966                         if (SOCKETERRNO == EWOULDBLOCK)
 967                                 return 0;
 968                         Con_Printf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
 969                 }
 970         }
 971         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 972         {
 973                 value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in6, sizeof(struct sockaddr_in6));
 974                 if (value == -1)
 975                 {
 976                         if (SOCKETERRNO == EWOULDBLOCK)
 977                                 return 0;
 978                         Con_Printf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
 979                 }
 980         }
 981         return value;
 982 }
 983
 984 #ifdef STANDALONETEST
 985 int main(int argc, char **argv)
 986 {
 987 #if 1
 988         char *buffer = "test", buffer2[1024];
 989         int blen = strlen(buffer);
 990         int b2len = 1024;
 991         lhnetsocket_t *sock1;
 992         lhnetsocket_t *sock2;
 993         lhnetaddress_t myaddy1;
 994         lhnetaddress_t myaddy2;
 995         lhnetaddress_t myaddy3;
 996         lhnetaddress_t localhostaddy1;
 997         lhnetaddress_t localhostaddy2;
 998         int test1;
 999         int test2;
1000
1001         printf("calling LHNET_Init\n");
1002         LHNET_Init();
1003
1004         printf("calling LHNET_FromPort twice to create two local addresses\n");
1005         LHNETADDRESS_FromPort(&myaddy1, LHNETADDRESSTYPE_INET4, 4000);
1006         LHNETADDRESS_FromPort(&myaddy2, LHNETADDRESSTYPE_INET4, 4001);
1007         LHNETADDRESS_FromString(&localhostaddy1, "127.0.0.1", 4000);
1008         LHNETADDRESS_FromString(&localhostaddy2, "127.0.0.1", 4001);
1009
1010         printf("calling LHNET_OpenSocket_Connectionless twice to create two local sockets\n");
1011         sock1 = LHNET_OpenSocket_Connectionless(&myaddy1);
1012         sock2 = LHNET_OpenSocket_Connectionless(&myaddy2);
1013
1014         printf("calling LHNET_Write to send a packet from the first socket to the second socket\n");
1015         test1 = LHNET_Write(sock1, buffer, blen, &localhostaddy2);
1016         printf("sleeping briefly\n");
1017 #ifdef WIN32
1018         Sleep (100);
1019 #else
1020         usleep (100000);
1021 #endif
1022         printf("calling LHNET_Read on the second socket to read the packet sent from the first socket\n");
1023         test2 = LHNET_Read(sock2, buffer2, b2len - 1, &myaddy3);
1024         if (test2 > 0)
1025                 Con_Printf("socket to socket test succeeded\n");
1026         else
1027                 Con_Printf("socket to socket test failed\n");
1028
1029 #ifdef WIN32
1030         printf("press any key to exit\n");
1031         getchar();
1032 #endif
1033
1034         printf("calling LHNET_Shutdown\n");
1035         LHNET_Shutdown();
1036         printf("exiting\n");
1037         return 0;
1038 #else
1039         lhnetsocket_t *sock[16], *sendsock;
1040         int i;
1041         int numsockets;
1042         int count;
1043         int length;
1044         int port;
1045         time_t oldtime;
1046         time_t newtime;
1047         char *sendmessage;
1048         int sendmessagelength;
1049         lhnetaddress_t destaddress;
1050         lhnetaddress_t receiveaddress;
1051         lhnetaddress_t sockaddress[16];
1052         char buffer[1536], addressstring[128], addressstring2[128];
1053         if ((argc == 2 || argc == 5) && (port = atoi(argv[1])) >= 1 && port < 65535)
1054         {
1055                 printf("calling LHNET_Init()\n");
1056                 LHNET_Init();
1057
1058                 numsockets = 0;
1059                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_LOOP, port);
1060                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET4, port);
1061                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET6, port+1);
1062
1063                 sendsock = NULL;
1064                 sendmessage = NULL;
1065                 sendmessagelength = 0;
1066
1067                 for (i = 0;i < numsockets;i++)
1068                 {
1069                         LHNETADDRESS_ToString(&sockaddress[i], addressstring, sizeof(addressstring), 1);
1070                         printf("calling LHNET_OpenSocket_Connectionless(<%s>)\n", addressstring);
1071                         if ((sock[i] = LHNET_OpenSocket_Connectionless(&sockaddress[i])))
1072                         {
1073                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1074                                 printf("opened socket successfully (address \"%s\")\n", addressstring2);
1075                         }
1076                         else
1077                         {
1078                                 printf("failed to open socket\n");
1079                                 if (i == 0)
1080                                 {
1081                                         LHNET_Shutdown();
1082                                         return -1;
1083                                 }
1084                         }
1085                 }
1086                 count = 0;
1087                 if (argc == 5)
1088                 {
1089                         count = atoi(argv[2]);
1090                         if (LHNETADDRESS_FromString(&destaddress, argv[3], -1))
1091                         {
1092                                 sendmessage = argv[4];
1093                                 sendmessagelength = strlen(sendmessage);
1094                                 sendsock = NULL;
1095                                 for (i = 0;i < numsockets;i++)
1096                                         if (sock[i] && LHNETADDRESS_GetAddressType(&destaddress) == LHNETADDRESS_GetAddressType(&sockaddress[i]))
1097                                                 sendsock = sock[i];
1098                                 if (sendsock == NULL)
1099                                 {
1100                                         printf("Could not find an open socket matching the addresstype (%i) of destination address, switching to listen only mode\n", LHNETADDRESS_GetAddressType(&destaddress));
1101                                         argc = 2;
1102                                 }
1103                         }
1104                         else
1105                         {
1106                                 printf("LHNETADDRESS_FromString did not like the address \"%s\", switching to listen only mode\n", argv[3]);
1107                                 argc = 2;
1108                         }
1109                 }
1110                 printf("started, now listening for \"exit\" on the opened sockets\n");
1111                 oldtime = time(NULL);
1112                 for(;;)
1113                 {
1114 #ifdef WIN32
1115                         Sleep(1);
1116 #else
1117                         usleep(1);
1118 #endif
1119                         for (i = 0;i < numsockets;i++)
1120                         {
1121                                 if (sock[i])
1122                                 {
1123                                         length = LHNET_Read(sock[i], buffer, sizeof(buffer), &receiveaddress);
1124                                         if (length < 0)
1125                                                 printf("localsock read error: length < 0");
1126                                         else if (length > 0 && length < (int)sizeof(buffer))
1127                                         {
1128                                                 buffer[length] = 0;
1129                                                 LHNETADDRESS_ToString(&receiveaddress, addressstring, sizeof(addressstring), 1);
1130                                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1131                                                 printf("received message \"%s\" from \"%s\" on socket \"%s\"\n", buffer, addressstring, addressstring2);
1132                                                 if (!strcmp(buffer, "exit"))
1133                                                         break;
1134                                         }
1135                                 }
1136                         }
1137                         if (i < numsockets)
1138                                 break;
1139                         if (argc == 5 && count > 0)
1140                         {
1141                                 newtime = time(NULL);
1142                                 if (newtime != oldtime)
1143                                 {
1144                                         LHNETADDRESS_ToString(&destaddress, addressstring, sizeof(addressstring), 1);
1145                                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(sendsock), addressstring2, sizeof(addressstring2), 1);
1146                                         printf("calling LHNET_Write(<%s>, \"%s\", %i, <%s>)\n", addressstring2, sendmessage, sendmessagelength, addressstring);
1147                                         length = LHNET_Write(sendsock, sendmessage, sendmessagelength, &destaddress);
1148                                         if (length == sendmessagelength)
1149                                                 printf("sent successfully\n");
1150                                         else
1151                                                 printf("LH_Write failed, returned %i (length of message was %i)\n", length, strlen(argv[4]));
1152                                         oldtime = newtime;
1153                                         count--;
1154                                         if (count <= 0)
1155                                                 printf("Done sending, still listening for \"exit\"\n");
1156                                 }
1157                         }
1158                 }
1159                 for (i = 0;i < numsockets;i++)
1160                 {
1161                         if (sock[i])
1162                         {
1163                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1164                                 printf("calling LHNET_CloseSocket(<%s>)\n", addressstring2);
1165                                 LHNET_CloseSocket(sock[i]);
1166                         }
1167                 }
1168                 printf("calling LHNET_Shutdown()\n");
1169                 LHNET_Shutdown();
1170                 return 0;
1171         }
1172         printf("Testing code for lhnet.c\nusage: lhnettest <localportnumber> [<sendnumberoftimes> <sendaddress:port> <sendmessage>]\n");
1173         return -1;
1174 #endif
1175 }
1176 #endif
1177