lhnet.c

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