lhnet.c

   1
   2 // Written by Forest Hale 2003-06-15 and placed into public domain.
   3
   4 #ifdef SUPPORTIPV6
   5 #ifdef WIN32
   6 // Windows XP or higher is required for getaddrinfo, but the inclusion of wspiapi provides fallbacks for older versions
   7 # define _WIN32_WINNT 0x0501
   8 # include <winsock2.h>
   9 # include <ws2tcpip.h>
  10 # ifdef USE_WSPIAPI_H
  11 #  include <wspiapi.h>
  12 # endif
  13 #endif
  14 #endif
  15
  16 #ifndef STANDALONETEST
  17 #include "quakedef.h"
  18 #endif
  19
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <time.h>
  23 #include <string.h>
  24 #ifdef WIN32
  25 #include <winsock2.h>
  26 #include <ws2tcpip.h>
  27 #else
  28 #include <unistd.h>
  29 #include <sys/types.h>
  30 #include <sys/socket.h>
  31 #include <sys/ioctl.h>
  32 #include <errno.h>
  33 #include <netdb.h>
  34 #include <netinet/in.h>
  35 #include <arpa/inet.h>
  36 #ifdef SUPPORTIPV6
  37 #include <net/if.h>
  38 #endif
  39 #endif
  40
  41 #ifdef __MORPHOS__
  42 #include <proto/socket.h>
  43 #endif
  44
  45 // for Z_Malloc/Z_Free in quake
  46 #ifndef STANDALONETEST
  47 #include "zone.h"
  48 #include "sys.h"
  49 #include "netconn.h"
  50 #else
  51 #define Con_Print printf
  52 #define Con_Printf printf
  53 #define Z_Malloc malloc
  54 #define Z_Free free
  55 #endif
  56
  57 #include "lhnet.h"
  58
  59 #if defined(WIN32)
  60 #define EWOULDBLOCK WSAEWOULDBLOCK
  61 #define ECONNREFUSED WSAECONNREFUSED
  62
  63 #define SOCKETERRNO WSAGetLastError()
  64
  65 #define IOC_VENDOR 0x18000000
  66 #define _WSAIOW(x,y) (IOC_IN|(x)|(y))
  67 #define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12)
  68
  69 #define SOCKLEN_T int
  70 #elif defined(__MORPHOS__)
  71 #define ioctlsocket IoctlSocket
  72 #define closesocket CloseSocket
  73 #define SOCKETERRNO Errno()
  74
  75 #define SOCKLEN_T int
  76 #else
  77 #define ioctlsocket ioctl
  78 #define closesocket close
  79 #define SOCKETERRNO errno
  80
  81 #define SOCKLEN_T socklen_t
  82 #endif
  83
  84 typedef struct lhnetaddressnative_s
  85 {
  86         lhnetaddresstype_t addresstype;
  87         int port;
  88         union
  89         {
  90                 struct sockaddr sock;
  91                 struct sockaddr_in in;
  92                 struct sockaddr_in6 in6;
  93         }
  94         addr;
  95 }
  96 lhnetaddressnative_t;
  97
  98 // to make LHNETADDRESS_FromString resolve repeated hostnames faster, cache them
  99 #define MAX_NAMECACHE 64
 100 static struct namecache_s
 101 {
 102         lhnetaddressnative_t address;
 103         double expirationtime;
 104         char name[64];
 105 }
 106 namecache[MAX_NAMECACHE];
 107 static int namecacheposition = 0;
 108
 109 int LHNETADDRESS_FromPort(lhnetaddress_t *vaddress, lhnetaddresstype_t addresstype, int port)
 110 {
 111         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 112         if (!address)
 113                 return 0;
 114         switch(addresstype)
 115         {
 116         default:
 117                 return 0;
 118         case LHNETADDRESSTYPE_LOOP:
 119                 // local:port  (loopback)
 120                 memset(address, 0, sizeof(*address));
 121                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 122                 address->port = port;
 123                 return 1;
 124         case LHNETADDRESSTYPE_INET4:
 125                 // 0.0.0.0:port  (INADDR_ANY, binds to all interfaces)
 126                 memset(address, 0, sizeof(*address));
 127                 address->addresstype = LHNETADDRESSTYPE_INET4;
 128                 address->port = port;
 129                 address->addr.in.sin_family = AF_INET;
 130                 address->addr.in.sin_port = htons((unsigned short)port);
 131                 return 1;
 132         case LHNETADDRESSTYPE_INET6:
 133                 // [0:0:0:0:0:0:0:0]:port  (IN6ADDR_ANY, binds to all interfaces)
 134                 memset(address, 0, sizeof(*address));
 135                 address->addresstype = LHNETADDRESSTYPE_INET6;
 136                 address->port = port;
 137                 address->addr.in6.sin6_family = AF_INET6;
 138                 address->addr.in6.sin6_port = htons((unsigned short)port);
 139                 return 1;
 140         }
 141         return 0;
 142 }
 143
 144 #ifdef SUPPORTIPV6
 145 int LHNETADDRESS_Resolve(lhnetaddressnative_t *address, const char *name, int port)
 146 {
 147         char port_buff [16];
 148         struct addrinfo hints;
 149         struct addrinfo* addrinf;
 150         int err;
 151
 152         dpsnprintf (port_buff, sizeof (port_buff), "%d", port);
 153         port_buff[sizeof (port_buff) - 1] = '\0';
 154
 155         memset(&hints, 0, sizeof (hints));
 156         hints.ai_family = AF_UNSPEC;
 157         hints.ai_socktype = SOCK_DGRAM;
 158         //hints.ai_flags = AI_PASSIVE;
 159
 160         err = getaddrinfo(name, port_buff, &hints, &addrinf);
 161         if (err != 0 || addrinf == NULL)
 162                 return 0;
 163         if (addrinf->ai_addr->sa_family != AF_INET6 && addrinf->ai_addr->sa_family != AF_INET)
 164         {
 165                 freeaddrinfo (addrinf);
 166                 return 0;
 167         }
 168
 169         // great it worked
 170         if (addrinf->ai_addr->sa_family == AF_INET6)
 171         {
 172                 address->addresstype = LHNETADDRESSTYPE_INET6;
 173                 memcpy(&address->addr.in6, addrinf->ai_addr, sizeof(address->addr.in6));
 174         }
 175         else
 176         {
 177                 address->addresstype = LHNETADDRESSTYPE_INET4;
 178                 memcpy(&address->addr.in, addrinf->ai_addr, sizeof(address->addr.in));
 179         }
 180         address->port = port;
 181
 182         freeaddrinfo (addrinf);
 183         return 1;
 184 }
 185
 186 int LHNETADDRESS_FromString(lhnetaddress_t *vaddress, const char *string, int defaultport)
 187 {
 188         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 189         int i, port, d1, d2, d3, d4, resolved;
 190         size_t namelen;
 191         unsigned char *a;
 192         char name[128];
 193 #ifdef STANDALONETEST
 194         char string2[128];
 195 #endif
 196         const char* addr_start;
 197         const char* addr_end = NULL;
 198         const char* port_name = NULL;
 199         int addr_family = AF_UNSPEC;
 200
 201         if (!address || !string || !*string)
 202                 return 0;
 203         memset(address, 0, sizeof(*address));
 204         address->addresstype = LHNETADDRESSTYPE_NONE;
 205         port = 0;
 206
 207         // If it's a bracketed IPv6 address
 208         if (string[0] == '[')
 209         {
 210                 const char* end_bracket = strchr(string, ']');
 211
 212                 if (end_bracket == NULL)
 213                         return 0;
 214
 215                 if (end_bracket[1] == ':')
 216                         port_name = end_bracket + 2;
 217                 else if (end_bracket[1] != '\0')
 218                         return 0;
 219
 220                 addr_family = AF_INET6;
 221                 addr_start = &string[1];
 222                 addr_end = end_bracket;
 223         }
 224         else
 225         {
 226                 const char* first_colon;
 227
 228                 addr_start = string;
 229
 230                 // If it's a numeric non-bracket IPv6 address (-> no port),
 231                 // or it's a numeric IPv4 address, or a name, with a port
 232                 first_colon = strchr(string, ':');
 233                 if (first_colon != NULL)
 234                 {
 235                         const char* last_colon = strrchr(first_colon + 1, ':');
 236
 237                         // If it's an numeric IPv4 address, or a name, with a port
 238                         if (last_colon == NULL)
 239                         {
 240                                 addr_end = first_colon;
 241                                 port_name = first_colon + 1;
 242                         }
 243                         else
 244                                 addr_family = AF_INET6;
 245                 }
 246         }
 247
 248         if (addr_end != NULL)
 249                 namelen = addr_end - addr_start;
 250         else
 251                 namelen = strlen (addr_start);
 252
 253         if (namelen >= sizeof(name))
 254                 namelen = sizeof(name) - 1;
 255         memcpy (name, addr_start, namelen);
 256         name[namelen] = 0;
 257
 258         if (port_name)
 259                 port = atoi(port_name);
 260
 261         if (port == 0)
 262                 port = defaultport;
 263
 264         // handle loopback
 265         if (!strcmp(name, "local"))
 266         {
 267                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 268                 address->port = port;
 269                 return 1;
 270         }
 271         // try to parse as dotted decimal ipv4 address first
 272         // note this supports partial ip addresses
 273         d1 = d2 = d3 = d4 = 0;
 274 #if _MSC_VER >= 1400
 275 #define sscanf sscanf_s
 276 #endif
 277         if (addr_family != AF_INET6 &&
 278                 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)
 279         {
 280                 // parsed a valid ipv4 address
 281                 address->addresstype = LHNETADDRESSTYPE_INET4;
 282                 address->port = port;
 283                 address->addr.in.sin_family = AF_INET;
 284                 address->addr.in.sin_port = htons((unsigned short)port);
 285                 a = (unsigned char *)&address->addr.in.sin_addr;
 286                 a[0] = d1;
 287                 a[1] = d2;
 288                 a[2] = d3;
 289                 a[3] = d4;
 290 #ifdef STANDALONETEST
 291                 LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
 292                 printf("manual parsing of ipv4 dotted decimal address \"%s\" successful: %s\n", string, string2);
 293 #endif
 294                 return 1;
 295         }
 296         for (i = 0;i < MAX_NAMECACHE;i++)
 297                 if (!strcmp(namecache[i].name, name))
 298                         break;
 299 #ifdef STANDALONETEST
 300         if (i < MAX_NAMECACHE)
 301 #else
 302         if (i < MAX_NAMECACHE && realtime < namecache[i].expirationtime)
 303 #endif
 304         {
 305                 *address = namecache[i].address;
 306                 address->port = port;
 307                 if (address->addresstype == LHNETADDRESSTYPE_INET6)
 308                 {
 309                         address->addr.in6.sin6_port = htons((unsigned short)port);
 310                         return 1;
 311                 }
 312                 else if (address->addresstype == LHNETADDRESSTYPE_INET4)
 313                 {
 314                         address->addr.in.sin_port = htons((unsigned short)port);
 315                         return 1;
 316                 }
 317                 return 0;
 318         }
 319
 320         for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
 321                 namecache[namecacheposition].name[i] = name[i];
 322         namecache[namecacheposition].name[i] = 0;
 323 #ifndef STANDALONETEST
 324         namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
 325 #endif
 326
 327         // try resolving the address (handles dns and other ip formats)
 328         resolved = LHNETADDRESS_Resolve(address, name, port);
 329         if (resolved)
 330         {
 331 #ifdef STANDALONETEST
 332                 const char *protoname;
 333
 334                 switch (address->addresstype)
 335                 {
 336                         case LHNETADDRESSTYPE_INET6:
 337                                 protoname = "ipv6";
 338                                 break;
 339                         case LHNETADDRESSTYPE_INET4:
 340                                 protoname = "ipv4";
 341                                 break;
 342                         default:
 343                                 protoname = "UNKNOWN";
 344                                 break;
 345                 }
 346                 LHNETADDRESS_ToString(vaddress, string2, sizeof(string2), 1);
 347                 Con_Printf("LHNETADDRESS_Resolve(\"%s\") returned %s address %s\n", string, protoname, string2);
 348 #endif
 349                 namecache[namecacheposition].address = *address;
 350         }
 351         else
 352         {
 353 #ifdef STANDALONETEST
 354                 printf("name resolution failed on address \"%s\"\n", name);
 355 #endif
 356                 namecache[namecacheposition].address.addresstype = LHNETADDRESSTYPE_NONE;
 357         }
 358
 359         namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
 360         return resolved;
 361 }
 362 #else
 363 int LHNETADDRESS_FromString(lhnetaddress_t *vaddress, const char *string, int defaultport)
 364 {
 365         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 366         int i, port, namelen, d1, d2, d3, d4;
 367         struct hostent *hostentry;
 368         unsigned char *a;
 369         const char *colon;
 370         char name[128];
 371 #ifdef STANDALONETEST
 372         char string2[128];
 373 #endif
 374         if (!address || !string || !*string)
 375                 return 0;
 376         memset(address, 0, sizeof(*address));
 377         address->addresstype = LHNETADDRESSTYPE_NONE;
 378         port = 0;
 379         colon = strrchr(string, ':');
 380         if (colon)
 381                 port = atoi(colon + 1);
 382         else
 383                 colon = string + strlen(string);
 384         if (port == 0)
 385                 port = defaultport;
 386         namelen = colon - string;
 387         if (namelen > 127)
 388                 namelen = 127;
 389         if (string[0] == '[' && namelen > 0 && string[namelen-1] == ']') // ipv6
 390         {
 391                 string++;
 392                 namelen -= 2;
 393         }
 394         memcpy(name, string, namelen);
 395         name[namelen] = 0;
 396         // handle loopback
 397         if (!strcmp(name, "local"))
 398         {
 399                 address->addresstype = LHNETADDRESSTYPE_LOOP;
 400                 address->port = port;
 401                 return 1;
 402         }
 403         // try to parse as dotted decimal ipv4 address first
 404         // note this supports partial ip addresses
 405         d1 = d2 = d3 = d4 = 0;
 406 #if _MSC_VER >= 1400
 407 #define sscanf sscanf_s
 408 #endif
 409         if (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)
 410         {
 411                 // parsed a valid ipv4 address
 412                 address->addresstype = LHNETADDRESSTYPE_INET4;
 413                 address->port = port;
 414                 address->addr.in.sin_family = AF_INET;
 415                 address->addr.in.sin_port = htons((unsigned short)port);
 416                 a = (unsigned char *)&address->addr.in.sin_addr;
 417                 a[0] = d1;
 418                 a[1] = d2;
 419                 a[2] = d3;
 420                 a[3] = d4;
 421 #ifdef STANDALONETEST
 422                 LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
 423                 printf("manual parsing of ipv4 dotted decimal address \"%s\" successful: %s\n", string, string2);
 424 #endif
 425                 return 1;
 426         }
 427         for (i = 0;i < MAX_NAMECACHE;i++)
 428                 if (!strcmp(namecache[i].name, name))
 429                         break;
 430 #ifdef STANDALONETEST
 431         if (i < MAX_NAMECACHE)
 432 #else
 433         if (i < MAX_NAMECACHE && realtime < namecache[i].expirationtime)
 434 #endif
 435         {
 436                 *address = namecache[i].address;
 437                 address->port = port;
 438                 if (address->addresstype == LHNETADDRESSTYPE_INET6)
 439                 {
 440                         address->addr.in6.sin6_port = htons((unsigned short)port);
 441                         return 1;
 442                 }
 443                 else if (address->addresstype == LHNETADDRESSTYPE_INET4)
 444                 {
 445                         address->addr.in.sin_port = htons((unsigned short)port);
 446                         return 1;
 447                 }
 448                 return 0;
 449         }
 450         // try gethostbyname (handles dns and other ip formats)
 451         hostentry = gethostbyname(name);
 452         if (hostentry)
 453         {
 454                 if (hostentry->h_addrtype == AF_INET6)
 455                 {
 456                         // great it worked
 457                         address->addresstype = LHNETADDRESSTYPE_INET6;
 458                         address->port = port;
 459                         address->addr.in6.sin6_family = hostentry->h_addrtype;
 460                         address->addr.in6.sin6_port = htons((unsigned short)port);
 461                         memcpy(&address->addr.in6.sin6_addr, hostentry->h_addr_list[0], sizeof(address->addr.in6.sin6_addr));
 462                         for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
 463                                 namecache[namecacheposition].name[i] = name[i];
 464                         namecache[namecacheposition].name[i] = 0;
 465 #ifndef STANDALONETEST
 466                         namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
 467 #endif
 468                         namecache[namecacheposition].address = *address;
 469                         namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
 470 #ifdef STANDALONETEST
 471                         LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
 472                         printf("gethostbyname(\"%s\") returned ipv6 address %s\n", string, string2);
 473 #endif
 474                         return 1;
 475                 }
 476                 else if (hostentry->h_addrtype == AF_INET)
 477                 {
 478                         // great it worked
 479                         address->addresstype = LHNETADDRESSTYPE_INET4;
 480                         address->port = port;
 481                         address->addr.in.sin_family = hostentry->h_addrtype;
 482                         address->addr.in.sin_port = htons((unsigned short)port);
 483                         memcpy(&address->addr.in.sin_addr, hostentry->h_addr_list[0], sizeof(address->addr.in.sin_addr));
 484                         for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
 485                                 namecache[namecacheposition].name[i] = name[i];
 486                         namecache[namecacheposition].name[i] = 0;
 487 #ifndef STANDALONETEST
 488                         namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
 489 #endif
 490                         namecache[namecacheposition].address = *address;
 491                         namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
 492 #ifdef STANDALONETEST
 493                         LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
 494                         printf("gethostbyname(\"%s\") returned ipv4 address %s\n", string, string2);
 495 #endif
 496                         return 1;
 497                 }
 498         }
 499 #ifdef STANDALONETEST
 500         printf("gethostbyname failed on address \"%s\"\n", name);
 501 #endif
 502         for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
 503                 namecache[namecacheposition].name[i] = name[i];
 504         namecache[namecacheposition].name[i] = 0;
 505 #ifndef STANDALONETEST
 506         namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
 507 #endif
 508         namecache[namecacheposition].address.addresstype = LHNETADDRESSTYPE_NONE;
 509         namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
 510         return 0;
 511 }
 512 #endif
 513
 514 int LHNETADDRESS_ToString(const lhnetaddress_t *vaddress, char *string, int stringbuffersize, int includeport)
 515 {
 516         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 517         const unsigned char *a;
 518         *string = 0;
 519         if (!address || !string || stringbuffersize < 1)
 520                 return 0;
 521         switch(address->addresstype)
 522         {
 523         default:
 524                 break;
 525         case LHNETADDRESSTYPE_LOOP:
 526                 if (includeport)
 527                 {
 528                         if (stringbuffersize >= 12)
 529                         {
 530                                 dpsnprintf(string, stringbuffersize, "local:%d", address->port);
 531                                 return 1;
 532                         }
 533                 }
 534                 else
 535                 {
 536                         if (stringbuffersize >= 6)
 537                         {
 538                                 memcpy(string, "local", 6);
 539                                 return 1;
 540                         }
 541                 }
 542                 break;
 543         case LHNETADDRESSTYPE_INET4:
 544                 a = (const unsigned char *)(&address->addr.in.sin_addr);
 545                 if (includeport)
 546                 {
 547                         if (stringbuffersize >= 22)
 548                         {
 549                                 dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d:%d", a[0], a[1], a[2], a[3], address->port);
 550                                 return 1;
 551                         }
 552                 }
 553                 else
 554                 {
 555                         if (stringbuffersize >= 16)
 556                         {
 557                                 dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
 558                                 return 1;
 559                         }
 560                 }
 561                 break;
 562         case LHNETADDRESSTYPE_INET6:
 563                 a = (const unsigned char *)(&address->addr.in6.sin6_addr);
 564                 if (includeport)
 565                 {
 566                         if (stringbuffersize >= 88)
 567                         {
 568                                 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);
 569                                 return 1;
 570                         }
 571                 }
 572                 else
 573                 {
 574                         if (stringbuffersize >= 80)
 575                         {
 576                                 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]);
 577                                 return 1;
 578                         }
 579                 }
 580                 break;
 581         }
 582         return 0;
 583 }
 584
 585 int LHNETADDRESS_GetAddressType(const lhnetaddress_t *address)
 586 {
 587         if (address)
 588                 return address->addresstype;
 589         else
 590                 return LHNETADDRESSTYPE_NONE;
 591 }
 592
 593 const char *LHNETADDRESS_GetInterfaceName(const lhnetaddress_t *vaddress)
 594 {
 595 #ifdef SUPPORTIPV6
 596         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 597
 598         if (address && address->addresstype == LHNETADDRESSTYPE_INET6)
 599         {
 600 #ifndef _WIN32
 601
 602                 static char ifname [IF_NAMESIZE];
 603
 604                 if (if_indextoname(address->addr.in6.sin6_scope_id, ifname) == ifname)
 605                         return ifname;
 606
 607 #else
 608
 609                 // The Win32 API doesn't have if_indextoname() until Windows Vista,
 610                 // but luckily it just uses the interface ID as the interface name
 611
 612                 static char ifname [16];
 613
 614                 if (dpsnprintf(ifname, sizeof(ifname), "%lu", address->addr.in6.sin6_scope_id) > 0)
 615                         return ifname;
 616
 617 #endif
 618         }
 619 #endif
 620
 621         return NULL;
 622 }
 623
 624 int LHNETADDRESS_GetPort(const lhnetaddress_t *address)
 625 {
 626         if (!address)
 627                 return -1;
 628         return address->port;
 629 }
 630
 631 int LHNETADDRESS_SetPort(lhnetaddress_t *vaddress, int port)
 632 {
 633         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 634         if (!address)
 635                 return 0;
 636         address->port = port;
 637         switch(address->addresstype)
 638         {
 639         case LHNETADDRESSTYPE_LOOP:
 640                 return 1;
 641         case LHNETADDRESSTYPE_INET4:
 642                 address->addr.in.sin_port = htons((unsigned short)port);
 643                 return 1;
 644         case LHNETADDRESSTYPE_INET6:
 645                 address->addr.in6.sin6_port = htons((unsigned short)port);
 646                 return 1;
 647         default:
 648                 return 0;
 649         }
 650 }
 651
 652 int LHNETADDRESS_Compare(const lhnetaddress_t *vaddress1, const lhnetaddress_t *vaddress2)
 653 {
 654         lhnetaddressnative_t *address1 = (lhnetaddressnative_t *)vaddress1;
 655         lhnetaddressnative_t *address2 = (lhnetaddressnative_t *)vaddress2;
 656         if (!address1 || !address2)
 657                 return 1;
 658         if (address1->addresstype != address2->addresstype)
 659                 return 1;
 660         switch(address1->addresstype)
 661         {
 662         case LHNETADDRESSTYPE_LOOP:
 663                 if (address1->port != address2->port)
 664                         return -1;
 665                 return 0;
 666         case LHNETADDRESSTYPE_INET4:
 667                 if (address1->addr.in.sin_family != address2->addr.in.sin_family)
 668                         return 1;
 669                 if (memcmp(&address1->addr.in.sin_addr, &address2->addr.in.sin_addr, sizeof(address1->addr.in.sin_addr)))
 670                         return 1;
 671                 if (address1->port != address2->port)
 672                         return -1;
 673                 return 0;
 674         case LHNETADDRESSTYPE_INET6:
 675                 if (address1->addr.in6.sin6_family != address2->addr.in6.sin6_family)
 676                         return 1;
 677                 if (memcmp(&address1->addr.in6.sin6_addr, &address2->addr.in6.sin6_addr, sizeof(address1->addr.in6.sin6_addr)))
 678                         return 1;
 679                 if (address1->port != address2->port)
 680                         return -1;
 681                 return 0;
 682         default:
 683                 return 1;
 684         }
 685 }
 686
 687 typedef struct lhnetpacket_s
 688 {
 689         void *data;
 690         int length;
 691         int sourceport;
 692         int destinationport;
 693         time_t timeout;
 694 #ifndef STANDALONETEST
 695         double sentdoubletime;
 696 #endif
 697         struct lhnetpacket_s *next, *prev;
 698 }
 699 lhnetpacket_t;
 700
 701 static int lhnet_active;
 702 static lhnetsocket_t lhnet_socketlist;
 703 static lhnetpacket_t lhnet_packetlist;
 704 #ifdef WIN32
 705 static int lhnet_didWSAStartup = 0;
 706 static WSADATA lhnet_winsockdata;
 707 #endif
 708
 709 void LHNET_Init(void)
 710 {
 711         if (lhnet_active)
 712                 return;
 713         lhnet_socketlist.next = lhnet_socketlist.prev = &lhnet_socketlist;
 714         lhnet_packetlist.next = lhnet_packetlist.prev = &lhnet_packetlist;
 715         lhnet_active = 1;
 716 #ifdef WIN32
 717         lhnet_didWSAStartup = !WSAStartup(MAKEWORD(1, 1), &lhnet_winsockdata);
 718         if (!lhnet_didWSAStartup)
 719                 Con_Print("LHNET_Init: WSAStartup failed, networking disabled\n");
 720 #endif
 721 }
 722
 723 void LHNET_Shutdown(void)
 724 {
 725         lhnetpacket_t *p;
 726         if (!lhnet_active)
 727                 return;
 728         while (lhnet_socketlist.next != &lhnet_socketlist)
 729                 LHNET_CloseSocket(lhnet_socketlist.next);
 730         while (lhnet_packetlist.next != &lhnet_packetlist)
 731         {
 732                 p = lhnet_packetlist.next;
 733                 p->prev->next = p->next;
 734                 p->next->prev = p->prev;
 735                 Z_Free(p);
 736         }
 737 #ifdef WIN32
 738         if (lhnet_didWSAStartup)
 739         {
 740                 lhnet_didWSAStartup = 0;
 741                 WSACleanup();
 742         }
 743 #endif
 744         lhnet_active = 0;
 745 }
 746
 747 static const char *LHNETPRIVATE_StrError(void)
 748 {
 749 #ifdef WIN32
 750         int i = WSAGetLastError();
 751         switch (i)
 752         {
 753                 case WSAEINTR:           return "WSAEINTR";
 754                 case WSAEBADF:           return "WSAEBADF";
 755                 case WSAEACCES:          return "WSAEACCES";
 756                 case WSAEFAULT:          return "WSAEFAULT";
 757                 case WSAEINVAL:          return "WSAEINVAL";
 758                 case WSAEMFILE:          return "WSAEMFILE";
 759                 case WSAEWOULDBLOCK:     return "WSAEWOULDBLOCK";
 760                 case WSAEINPROGRESS:     return "WSAEINPROGRESS";
 761                 case WSAEALREADY:        return "WSAEALREADY";
 762                 case WSAENOTSOCK:        return "WSAENOTSOCK";
 763                 case WSAEDESTADDRREQ:    return "WSAEDESTADDRREQ";
 764                 case WSAEMSGSIZE:        return "WSAEMSGSIZE";
 765                 case WSAEPROTOTYPE:      return "WSAEPROTOTYPE";
 766                 case WSAENOPROTOOPT:     return "WSAENOPROTOOPT";
 767                 case WSAEPROTONOSUPPORT: return "WSAEPROTONOSUPPORT";
 768                 case WSAESOCKTNOSUPPORT: return "WSAESOCKTNOSUPPORT";
 769                 case WSAEOPNOTSUPP:      return "WSAEOPNOTSUPP";
 770                 case WSAEPFNOSUPPORT:    return "WSAEPFNOSUPPORT";
 771                 case WSAEAFNOSUPPORT:    return "WSAEAFNOSUPPORT";
 772                 case WSAEADDRINUSE:      return "WSAEADDRINUSE";
 773                 case WSAEADDRNOTAVAIL:   return "WSAEADDRNOTAVAIL";
 774                 case WSAENETDOWN:        return "WSAENETDOWN";
 775                 case WSAENETUNREACH:     return "WSAENETUNREACH";
 776                 case WSAENETRESET:       return "WSAENETRESET";
 777                 case WSAECONNABORTED:    return "WSAECONNABORTED";
 778                 case WSAECONNRESET:      return "WSAECONNRESET";
 779                 case WSAENOBUFS:         return "WSAENOBUFS";
 780                 case WSAEISCONN:         return "WSAEISCONN";
 781                 case WSAENOTCONN:        return "WSAENOTCONN";
 782                 case WSAESHUTDOWN:       return "WSAESHUTDOWN";
 783                 case WSAETOOMANYREFS:    return "WSAETOOMANYREFS";
 784                 case WSAETIMEDOUT:       return "WSAETIMEDOUT";
 785                 case WSAECONNREFUSED:    return "WSAECONNREFUSED";
 786                 case WSAELOOP:           return "WSAELOOP";
 787                 case WSAENAMETOOLONG:    return "WSAENAMETOOLONG";
 788                 case WSAEHOSTDOWN:       return "WSAEHOSTDOWN";
 789                 case WSAEHOSTUNREACH:    return "WSAEHOSTUNREACH";
 790                 case WSAENOTEMPTY:       return "WSAENOTEMPTY";
 791                 case WSAEPROCLIM:        return "WSAEPROCLIM";
 792                 case WSAEUSERS:          return "WSAEUSERS";
 793                 case WSAEDQUOT:          return "WSAEDQUOT";
 794                 case WSAESTALE:          return "WSAESTALE";
 795                 case WSAEREMOTE:         return "WSAEREMOTE";
 796                 case WSAEDISCON:         return "WSAEDISCON";
 797                 case 0:                  return "no error";
 798                 default:                 return "unknown WSAE error";
 799         }
 800 #else
 801         return strerror(errno);
 802 #endif
 803 }
 804
 805 void LHNET_SleepUntilPacket_Microseconds(int microseconds)
 806 {
 807         fd_set fdreadset;
 808         struct timeval tv;
 809         int lastfd;
 810         lhnetsocket_t *s;
 811         FD_ZERO(&fdreadset);
 812         lastfd = 0;
 813         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 814         {
 815                 if (s->address.addresstype == LHNETADDRESSTYPE_INET4 || s->address.addresstype == LHNETADDRESSTYPE_INET6)
 816                 {
 817                         if (lastfd < s->inetsocket)
 818                                 lastfd = s->inetsocket;
 819                         FD_SET((unsigned int)s->inetsocket, &fdreadset);
 820                 }
 821         }
 822         tv.tv_sec = microseconds / 1000000;
 823         tv.tv_usec = microseconds % 1000000;
 824         select(lastfd + 1, &fdreadset, NULL, NULL, &tv);
 825 }
 826
 827 lhnetsocket_t *LHNET_OpenSocket_Connectionless(lhnetaddress_t *address)
 828 {
 829         lhnetsocket_t *lhnetsocket, *s;
 830         if (!address)
 831                 return NULL;
 832         lhnetsocket = (lhnetsocket_t *)Z_Malloc(sizeof(*lhnetsocket));
 833         if (lhnetsocket)
 834         {
 835                 memset(lhnetsocket, 0, sizeof(*lhnetsocket));
 836                 lhnetsocket->address = *address;
 837                 switch(lhnetsocket->address.addresstype)
 838                 {
 839                 case LHNETADDRESSTYPE_LOOP:
 840                         if (lhnetsocket->address.port == 0)
 841                         {
 842                                 // allocate a port dynamically
 843                                 // this search will always terminate because there is never
 844                                 // an allocated socket with port 0, so if the number wraps it
 845                                 // will find the port is unused, and then refuse to use port
 846                                 // 0, causing an intentional failure condition
 847                                 lhnetsocket->address.port = 1024;
 848                                 for (;;)
 849                                 {
 850                                         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 851                                                 if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
 852                                                         break;
 853                                         if (s == &lhnet_socketlist)
 854                                                 break;
 855                                         lhnetsocket->address.port++;
 856                                 }
 857                         }
 858                         // check if the port is available
 859                         for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
 860                                 if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
 861                                         break;
 862                         if (s == &lhnet_socketlist && lhnetsocket->address.port != 0)
 863                         {
 864                                 lhnetsocket->next = &lhnet_socketlist;
 865                                 lhnetsocket->prev = lhnetsocket->next->prev;
 866                                 lhnetsocket->next->prev = lhnetsocket;
 867                                 lhnetsocket->prev->next = lhnetsocket;
 868                                 return lhnetsocket;
 869                         }
 870                         break;
 871                 case LHNETADDRESSTYPE_INET4:
 872                 case LHNETADDRESSTYPE_INET6:
 873 #ifdef WIN32
 874                         if (lhnet_didWSAStartup)
 875                         {
 876 #endif
 877                                 if ((lhnetsocket->inetsocket = socket(address->addresstype == LHNETADDRESSTYPE_INET6 ? PF_INET6 : PF_INET, SOCK_DGRAM, IPPROTO_UDP)) != -1)
 878                                 {
 879 #ifdef WIN32
 880                                         u_long _true = 1;
 881                                         u_long _false = 0;
 882 #else
 883                                         char _true = 1;
 884 #endif
 885                                         if (ioctlsocket(lhnetsocket->inetsocket, FIONBIO, &_true) != -1)
 886                                         {
 887 #ifdef IPV6_V6ONLY
 888                                                 // We need to set this flag to tell the OS that we only listen on IPv6. If we don't
 889                                                 // most OSes will create a dual-protocol socket that also listens on IPv4. In this case
 890                                                 // if an IPv4 socket is already bound to the port we want, our bind() call will fail.
 891                                                 int ipv6_only = 1;
 892                                                 if (address->addresstype != LHNETADDRESSTYPE_INET6
 893                                                         || setsockopt (lhnetsocket->inetsocket, IPPROTO_IPV6, IPV6_V6ONLY,
 894                                                                                    (const char *)&ipv6_only, sizeof(ipv6_only)) == 0
 895 #ifdef WIN32
 896                                                         // The Win32 API only supports IPV6_V6ONLY since Windows Vista, but fortunately
 897                                                         // the default value is what we want on Win32 anyway (IPV6_V6ONLY = true)
 898                                                         || SOCKETERRNO == WSAENOPROTOOPT
 899 #endif
 900                                                         )
 901 #endif
 902                                                 {
 903                                                         lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
 904                                                         SOCKLEN_T namelen;
 905                                                         int bindresult;
 906                                                         if (address->addresstype == LHNETADDRESSTYPE_INET6)
 907                                                         {
 908                                                                 namelen = sizeof(localaddress->addr.in6);
 909                                                                 bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
 910                                                                 if (bindresult != -1)
 911                                                                         getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
 912                                                         }
 913                                                         else
 914                                                         {
 915                                                                 namelen = sizeof(localaddress->addr.in);
 916                                                                 bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
 917                                                                 if (bindresult != -1)
 918                                                                         getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
 919                                                         }
 920                                                         if (bindresult != -1)
 921                                                         {
 922                                                                 int i = 1;
 923                                                                 // enable broadcast on this socket
 924                                                                 setsockopt(lhnetsocket->inetsocket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i));
 925                                                                 lhnetsocket->next = &lhnet_socketlist;
 926                                                                 lhnetsocket->prev = lhnetsocket->next->prev;
 927                                                                 lhnetsocket->next->prev = lhnetsocket;
 928                                                                 lhnetsocket->prev->next = lhnetsocket;
 929 #ifdef WIN32
 930                                                                 if (ioctlsocket(lhnetsocket->inetsocket, SIO_UDP_CONNRESET, &_false) == -1)
 931                                                                         Con_DPrintf("LHNET_OpenSocket_Connectionless: ioctlsocket SIO_UDP_CONNRESET returned error: %s\n", LHNETPRIVATE_StrError());
 932 #endif
 933                                                                 return lhnetsocket;
 934                                                         }
 935                                                         else
 936                                                                 Con_Printf("LHNET_OpenSocket_Connectionless: bind returned error: %s\n", LHNETPRIVATE_StrError());
 937                                                 }
 938 #ifdef IPV6_V6ONLY
 939                                                 else
 940                                                         Con_Printf("LHNET_OpenSocket_Connectionless: setsockopt(IPV6_V6ONLY) returned error: %s\n", LHNETPRIVATE_StrError());
 941 #endif
 942                                         }
 943                                         else
 944                                                 Con_Printf("LHNET_OpenSocket_Connectionless: ioctlsocket returned error: %s\n", LHNETPRIVATE_StrError());
 945                                         closesocket(lhnetsocket->inetsocket);
 946                                 }
 947                                 else
 948                                         Con_Printf("LHNET_OpenSocket_Connectionless: socket returned error: %s\n", LHNETPRIVATE_StrError());
 949 #ifdef WIN32
 950                         }
 951                         else
 952                                 Con_Print("LHNET_OpenSocket_Connectionless: can't open a socket (WSAStartup failed during LHNET_Init)\n");
 953 #endif
 954                         break;
 955                 default:
 956                         break;
 957                 }
 958                 Z_Free(lhnetsocket);
 959         }
 960         return NULL;
 961 }
 962
 963 void LHNET_CloseSocket(lhnetsocket_t *lhnetsocket)
 964 {
 965         if (lhnetsocket)
 966         {
 967                 // unlink from socket list
 968                 if (lhnetsocket->next == NULL)
 969                         return; // invalid!
 970                 lhnetsocket->next->prev = lhnetsocket->prev;
 971                 lhnetsocket->prev->next = lhnetsocket->next;
 972                 lhnetsocket->next = NULL;
 973                 lhnetsocket->prev = NULL;
 974
 975                 // no special close code for loopback, just inet
 976                 if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4 || lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
 977                 {
 978                         closesocket(lhnetsocket->inetsocket);
 979                 }
 980                 Z_Free(lhnetsocket);
 981         }
 982 }
 983
 984 lhnetaddress_t *LHNET_AddressFromSocket(lhnetsocket_t *sock)
 985 {
 986         if (sock)
 987                 return &sock->address;
 988         else
 989                 return NULL;
 990 }
 991
 992 int LHNET_Read(lhnetsocket_t *lhnetsocket, void *content, int maxcontentlength, lhnetaddress_t *vaddress)
 993 {
 994         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
 995         int value = 0;
 996         if (!lhnetsocket || !address || !content || maxcontentlength < 1)
 997                 return -1;
 998         if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
 999         {
1000                 time_t currenttime;
1001                 lhnetpacket_t *p, *pnext;
1002                 // scan for any old packets to timeout while searching for a packet
1003                 // that is waiting to be delivered to this socket
1004                 currenttime = time(NULL);
1005                 for (p = lhnet_packetlist.next;p != &lhnet_packetlist;p = pnext)
1006                 {
1007                         pnext = p->next;
1008                         if (p->timeout < currenttime)
1009                         {
1010                                 // unlink and free
1011                                 p->next->prev = p->prev;
1012                                 p->prev->next = p->next;
1013                                 Z_Free(p);
1014                                 continue;
1015                         }
1016 #ifndef STANDALONETEST
1017                         if (cl_netlocalping.value && (realtime - cl_netlocalping.value * (1.0 / 2000.0)) < p->sentdoubletime)
1018                                 continue;
1019 #endif
1020                         if (value == 0 && p->destinationport == lhnetsocket->address.port)
1021                         {
1022                                 if (p->length <= maxcontentlength)
1023                                 {
1024                                         lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
1025                                         *address = *localaddress;
1026                                         address->port = p->sourceport;
1027                                         memcpy(content, p->data, p->length);
1028                                         value = p->length;
1029                                 }
1030                                 else
1031                                         value = -1;
1032                                 // unlink and free
1033                                 p->next->prev = p->prev;
1034                                 p->prev->next = p->next;
1035                                 Z_Free(p);
1036                         }
1037                 }
1038         }
1039         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
1040         {
1041                 SOCKLEN_T inetaddresslength;
1042                 address->addresstype = LHNETADDRESSTYPE_NONE;
1043                 inetaddresslength = sizeof(address->addr.in);
1044                 value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, 0, &address->addr.sock, &inetaddresslength);
1045                 if (value > 0)
1046                 {
1047                         address->addresstype = LHNETADDRESSTYPE_INET4;
1048                         address->port = ntohs(address->addr.in.sin_port);
1049                         return value;
1050                 }
1051                 else if (value == -1)
1052                 {
1053                         int e = SOCKETERRNO;
1054                         if (e == EWOULDBLOCK)
1055                                 return 0;
1056                         switch (e)
1057                         {
1058                                 case ECONNREFUSED:
1059                                         Con_Print("Connection refused\n");
1060                                         return 0;
1061                         }
1062                         Con_Printf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
1063                 }
1064         }
1065         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
1066         {
1067                 SOCKLEN_T inetaddresslength;
1068                 address->addresstype = LHNETADDRESSTYPE_NONE;
1069                 inetaddresslength = sizeof(address->addr.in6);
1070                 value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, 0, &address->addr.sock, &inetaddresslength);
1071                 if (value > 0)
1072                 {
1073                         address->addresstype = LHNETADDRESSTYPE_INET6;
1074                         address->port = ntohs(address->addr.in6.sin6_port);
1075                         return value;
1076                 }
1077                 else if (value == -1)
1078                 {
1079                         int e = SOCKETERRNO;
1080                         if (e == EWOULDBLOCK)
1081                                 return 0;
1082                         switch (e)
1083                         {
1084                                 case ECONNREFUSED:
1085                                         Con_Print("Connection refused\n");
1086                                         return 0;
1087                         }
1088                         Con_Printf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
1089                 }
1090         }
1091         return value;
1092 }
1093
1094 int LHNET_Write(lhnetsocket_t *lhnetsocket, const void *content, int contentlength, const lhnetaddress_t *vaddress)
1095 {
1096         lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
1097         int value = -1;
1098         if (!lhnetsocket || !address || !content || contentlength < 1)
1099                 return -1;
1100         if (lhnetsocket->address.addresstype != address->addresstype)
1101                 return -1;
1102         if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
1103         {
1104                 lhnetpacket_t *p;
1105                 p = (lhnetpacket_t *)Z_Malloc(sizeof(*p) + contentlength);
1106                 p->data = (void *)(p + 1);
1107                 memcpy(p->data, content, contentlength);
1108                 p->length = contentlength;
1109                 p->sourceport = lhnetsocket->address.port;
1110                 p->destinationport = address->port;
1111                 p->timeout = time(NULL) + 10;
1112                 p->next = &lhnet_packetlist;
1113                 p->prev = p->next->prev;
1114                 p->next->prev = p;
1115                 p->prev->next = p;
1116 #ifndef STANDALONETEST
1117                 p->sentdoubletime = realtime;
1118 #endif
1119                 value = contentlength;
1120         }
1121         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
1122         {
1123                 value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in, sizeof(struct sockaddr_in));
1124                 if (value == -1)
1125                 {
1126                         if (SOCKETERRNO == EWOULDBLOCK)
1127                                 return 0;
1128                         Con_Printf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
1129                 }
1130         }
1131         else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
1132         {
1133                 value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in6, sizeof(struct sockaddr_in6));
1134                 if (value == -1)
1135                 {
1136                         if (SOCKETERRNO == EWOULDBLOCK)
1137                                 return 0;
1138                         Con_Printf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
1139                 }
1140         }
1141         return value;
1142 }
1143
1144 #ifdef STANDALONETEST
1145 int main(int argc, char **argv)
1146 {
1147 #if 1
1148         char *buffer = "test", buffer2[1024];
1149         int blen = strlen(buffer);
1150         int b2len = 1024;
1151         lhnetsocket_t *sock1;
1152         lhnetsocket_t *sock2;
1153         lhnetaddress_t myaddy1;
1154         lhnetaddress_t myaddy2;
1155         lhnetaddress_t myaddy3;
1156         lhnetaddress_t localhostaddy1;
1157         lhnetaddress_t localhostaddy2;
1158         int test1;
1159         int test2;
1160
1161         printf("calling LHNET_Init\n");
1162         LHNET_Init();
1163
1164         printf("calling LHNET_FromPort twice to create two local addresses\n");
1165         LHNETADDRESS_FromPort(&myaddy1, LHNETADDRESSTYPE_INET4, 4000);
1166         LHNETADDRESS_FromPort(&myaddy2, LHNETADDRESSTYPE_INET4, 4001);
1167         LHNETADDRESS_FromString(&localhostaddy1, "127.0.0.1", 4000);
1168         LHNETADDRESS_FromString(&localhostaddy2, "127.0.0.1", 4001);
1169
1170         printf("calling LHNET_OpenSocket_Connectionless twice to create two local sockets\n");
1171         sock1 = LHNET_OpenSocket_Connectionless(&myaddy1);
1172         sock2 = LHNET_OpenSocket_Connectionless(&myaddy2);
1173
1174         printf("calling LHNET_Write to send a packet from the first socket to the second socket\n");
1175         test1 = LHNET_Write(sock1, buffer, blen, &localhostaddy2);
1176         printf("sleeping briefly\n");
1177 #ifdef WIN32
1178         Sleep (100);
1179 #else
1180         usleep (100000);
1181 #endif
1182         printf("calling LHNET_Read on the second socket to read the packet sent from the first socket\n");
1183         test2 = LHNET_Read(sock2, buffer2, b2len - 1, &myaddy3);
1184         if (test2 > 0)
1185                 Con_Printf("socket to socket test succeeded\n");
1186         else
1187                 Con_Printf("socket to socket test failed\n");
1188
1189 #ifdef WIN32
1190         printf("press any key to exit\n");
1191         getchar();
1192 #endif
1193
1194         printf("calling LHNET_Shutdown\n");
1195         LHNET_Shutdown();
1196         printf("exiting\n");
1197         return 0;
1198 #else
1199         lhnetsocket_t *sock[16], *sendsock;
1200         int i;
1201         int numsockets;
1202         int count;
1203         int length;
1204         int port;
1205         time_t oldtime;
1206         time_t newtime;
1207         char *sendmessage;
1208         int sendmessagelength;
1209         lhnetaddress_t destaddress;
1210         lhnetaddress_t receiveaddress;
1211         lhnetaddress_t sockaddress[16];
1212         char buffer[1536], addressstring[128], addressstring2[128];
1213         if ((argc == 2 || argc == 5) && (port = atoi(argv[1])) >= 1 && port < 65535)
1214         {
1215                 printf("calling LHNET_Init()\n");
1216                 LHNET_Init();
1217
1218                 numsockets = 0;
1219                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_LOOP, port);
1220                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET4, port);
1221                 LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET6, port+1);
1222
1223                 sendsock = NULL;
1224                 sendmessage = NULL;
1225                 sendmessagelength = 0;
1226
1227                 for (i = 0;i < numsockets;i++)
1228                 {
1229                         LHNETADDRESS_ToString(&sockaddress[i], addressstring, sizeof(addressstring), 1);
1230                         printf("calling LHNET_OpenSocket_Connectionless(<%s>)\n", addressstring);
1231                         if ((sock[i] = LHNET_OpenSocket_Connectionless(&sockaddress[i])))
1232                         {
1233                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1234                                 printf("opened socket successfully (address \"%s\")\n", addressstring2);
1235                         }
1236                         else
1237                         {
1238                                 printf("failed to open socket\n");
1239                                 if (i == 0)
1240                                 {
1241                                         LHNET_Shutdown();
1242                                         return -1;
1243                                 }
1244                         }
1245                 }
1246                 count = 0;
1247                 if (argc == 5)
1248                 {
1249                         count = atoi(argv[2]);
1250                         if (LHNETADDRESS_FromString(&destaddress, argv[3], -1))
1251                         {
1252                                 sendmessage = argv[4];
1253                                 sendmessagelength = strlen(sendmessage);
1254                                 sendsock = NULL;
1255                                 for (i = 0;i < numsockets;i++)
1256                                         if (sock[i] && LHNETADDRESS_GetAddressType(&destaddress) == LHNETADDRESS_GetAddressType(&sockaddress[i]))
1257                                                 sendsock = sock[i];
1258                                 if (sendsock == NULL)
1259                                 {
1260                                         printf("Could not find an open socket matching the addresstype (%i) of destination address, switching to listen only mode\n", LHNETADDRESS_GetAddressType(&destaddress));
1261                                         argc = 2;
1262                                 }
1263                         }
1264                         else
1265                         {
1266                                 printf("LHNETADDRESS_FromString did not like the address \"%s\", switching to listen only mode\n", argv[3]);
1267                                 argc = 2;
1268                         }
1269                 }
1270                 printf("started, now listening for \"exit\" on the opened sockets\n");
1271                 oldtime = time(NULL);
1272                 for(;;)
1273                 {
1274 #ifdef WIN32
1275                         Sleep(1);
1276 #else
1277                         usleep(1);
1278 #endif
1279                         for (i = 0;i < numsockets;i++)
1280                         {
1281                                 if (sock[i])
1282                                 {
1283                                         length = LHNET_Read(sock[i], buffer, sizeof(buffer), &receiveaddress);
1284                                         if (length < 0)
1285                                                 printf("localsock read error: length < 0");
1286                                         else if (length > 0 && length < (int)sizeof(buffer))
1287                                         {
1288                                                 buffer[length] = 0;
1289                                                 LHNETADDRESS_ToString(&receiveaddress, addressstring, sizeof(addressstring), 1);
1290                                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1291                                                 printf("received message \"%s\" from \"%s\" on socket \"%s\"\n", buffer, addressstring, addressstring2);
1292                                                 if (!strcmp(buffer, "exit"))
1293                                                         break;
1294                                         }
1295                                 }
1296                         }
1297                         if (i < numsockets)
1298                                 break;
1299                         if (argc == 5 && count > 0)
1300                         {
1301                                 newtime = time(NULL);
1302                                 if (newtime != oldtime)
1303                                 {
1304                                         LHNETADDRESS_ToString(&destaddress, addressstring, sizeof(addressstring), 1);
1305                                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(sendsock), addressstring2, sizeof(addressstring2), 1);
1306                                         printf("calling LHNET_Write(<%s>, \"%s\", %i, <%s>)\n", addressstring2, sendmessage, sendmessagelength, addressstring);
1307                                         length = LHNET_Write(sendsock, sendmessage, sendmessagelength, &destaddress);
1308                                         if (length == sendmessagelength)
1309                                                 printf("sent successfully\n");
1310                                         else
1311                                                 printf("LH_Write failed, returned %i (length of message was %i)\n", length, strlen(argv[4]));
1312                                         oldtime = newtime;
1313                                         count--;
1314                                         if (count <= 0)
1315                                                 printf("Done sending, still listening for \"exit\"\n");
1316                                 }
1317                         }
1318                 }
1319                 for (i = 0;i < numsockets;i++)
1320                 {
1321                         if (sock[i])
1322                         {
1323                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
1324                                 printf("calling LHNET_CloseSocket(<%s>)\n", addressstring2);
1325                                 LHNET_CloseSocket(sock[i]);
1326                         }
1327                 }
1328                 printf("calling LHNET_Shutdown()\n");
1329                 LHNET_Shutdown();
1330                 return 0;
1331         }
1332         printf("Testing code for lhnet.c\nusage: lhnettest <localportnumber> [<sendnumberoftimes> <sendaddress:port> <sendmessage>]\n");
1333         return -1;
1334 #endif
1335 }
1336 #endif
1337