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