lhnet.c

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