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