1/* 2Copyright (C) 1996-1997 Id Software, Inc. 3 4This program is free software; you can redistribute it and/or 5modify it under the terms of the GNU General Public License 6as published by the Free Software Foundation; either version 2 7of the License, or (at your option) any later version. 8 9This program is distributed in the hope that it will be useful, 10but WITHOUT ANY WARRANTY; without even the implied warranty of 11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 13See the GNU General Public License for more details. 14 15You should have received a copy of the GNU General Public License 16along with this program; if not, write to the Free Software 17Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19*/ 20// net_bw.c 21 22#include <stdio.h> 23#include <stdlib.h> 24#include <dpmi.h> 25 26#include "quakedef.h" 27#include "dosisms.h" 28 29 30// this section is general Unix stuff that we need 31 32#define EIO 5 /* I/O error */ 33#define EBADS 9 34#define EWOULDBLOCK 35 /* function would block */ 35#define EMSGSIZE 40 /* message to big for buffers */ 36#define EPROTONOSUPPORT 43 /* Protocol not supported */ 37#define ESOCKTNOSUPPORT 44 /* Socket type not supported */ 38#define EPFNOSUPPORT 46 /* Protocol family not supported */ 39#define EAFNOSUPPORT 47 /* Address family not supported */ 40#define ECONNABORTED 53 /* User requested hangup */ 41#define ENOBUFS 55 /* No buffers available */ 42#define EISCONN 56 /* Socket has closed */ 43#define ENOTCONN 57 /* Socket is not connected */ 44#define ESHUTDOWN 58 /* Socket is closed */ 45#define ETOOMANYREFS 59 /* Too many sockets open */ 46#define ETIMEDOUT 60 /* Connection timed out */ 47#define ECONNREFUSED 61 /* Connection refused */ 48 49#define AF_INET 2 /* internet */ 50 51#define PF_INET AF_INET 52 53#define SOCK_STREAM 1 /* stream */ 54#define SOCK_DGRAM 2 /* datagram */ 55 56#define IPPROTO_TCP 6 57#define IPPROTO_UDP 17 58 59#define INADDR_ANY 0 60 61#define SIOCDONE 0x7300 62#define FIONREAD 0x667f 63#define FIONBIO 0x667e 64#define FIONWIN 0x1000 65#define FIONTIN 0x2000 66 67#define BRDINIT 0 68#define BRDADDR 10 69 70#define MAXHOSTNAMELEN 256 71 72#define SOL_SOCKET 0xffff /* options for socket level */ 73 74/* 75 * Option flags per-socket. 76 */ 77#define SO_DEBUG 0x0001 /* turn on debugging info recording */ 78#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 79#define SO_REUSEADDR 0x0004 /* allow local address reuse */ 80#define SO_KEEPALIVE 0x0008 /* keep connections alive */ 81#define SO_DONTROUTE 0x0010 /* just use interface addresses */ 82#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 83#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 84#define SO_LINGER 0x0080 /* linger on close if data present */ 85#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 86#define SO_USEPRIV 0x4000 /* allocate from privileged port area */ 87#define SO_CANTSIG 0x8000 /* prevent SIGPIPE on SS_CANTSENDMORE */ 88 89/* 90 * Additional options, not kept in so_options. 91 */ 92#define SO_SNDBUF 0x1001 /* send buffer size */ 93#define SO_RCVBUF 0x1002 /* receive buffer size */ 94#define SO_SNDLOWAT 0x1003 /* send low-water mark */ 95#define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 96#define SO_SNDTIMEO 0x1005 /* send timeout */ 97#define SO_RCVTIMEO 0x1006 /* receive timeout */ 98#define SO_ERROR 0x1007 /* get error status and clear */ 99#define SO_TYPE 0x1008 /* get socket type */ 100 101 102struct in_addr 103{ 104 union 105 { 106 struct { unsigned char s_b1,s_b2,s_b3,s_b4; } S_un_b; 107 struct { unsigned short s_w1,s_w2; } S_un_w; 108 unsigned long S_addr; 109 } S_un; 110}; 111#define s_addr S_un.S_addr /* can be used for most tcp & ip code */ 112#define s_host S_un.S_un_b.s_b2 /* host on imp */ 113#define s_net S_un.S_un_b.s_b1 /* network */ 114#define s_imp S_un.S_un_w.s_w2 /* imp */ 115#define s_impno S_un.S_un_b.s_b4 /* imp # */ 116#define s_lh S_un.S_un_b.s_b3 /* logical host */ 117 118struct sockaddr_in 119{ 120 short sin_family; 121 unsigned short sin_port; 122 struct in_addr sin_addr; 123 char sin_zero[8]; 124}; 125 126struct hostent { 127 char *h_name; /* official name of host */ 128 char **h_aliases; /* alias list */ 129 int h_addrtype; /* host address type */ 130 int h_length; /* length of address */ 131 char **h_addr_list; /* list of addresses from name server */ 132#define h_addr h_addr_list[0] /* address, for backward compatiblity */ 133}; 134 135char *inet_ntoa(struct in_addr in); 136 137 138// this section is B&W specific constants & structures 139 140#define BW_IOCTL_BIND 0 141#define BW_IOCTL_CLEAROPTIONS 5 142#define BW_IOCTL_SETOPTIONS 6 143#define BW_IOCTL_PEEK 7 144#define BW_IOCTL_SETWINMASK 8 145 146#define BW_OPTION_BLOCKING 0x01 147#define BW_OPTION_REUSEBUFFERS 0x80 148 149#define BW_ERR_USR_HANGUP 50 150#define BW_ERR_HANGUP 51 151#define BW_ERR_NET_ERR 52 152#define BW_ERR_IS_CLOSED 53 153#define BW_ERR_TIME_OUT 54 154#define BW_ERR_RESET 55 155#define BW_ERR_FULL 56 156#define BW_ERR_BLOCK 57 157#define BW_ERR_SHUTDOWN 58 158 159#pragma pack(1) 160 161typedef struct 162{ 163 char state; // always 1 164 short localPort; 165 struct in_addr localAddr; 166 char reason; // always 0 167 char options; 168 short dataAvailable; 169} BW_UDPinfo_t; 170 171typedef struct 172{ 173 char reserved1 [6]; 174 unsigned short info2Offset; 175 char reserved2 [18]; 176 struct in_addr remoteAddr; 177} BW_UDPreadInfo1_t; 178 179typedef struct 180{ 181 short remotePort; 182 char reserved1 [2]; 183 unsigned short dataLenPlus8; 184 char reserved2 [2]; 185 char data[1]; // actual size is <dataLenPlus8> - 8 186} BW_UDPreadInfo2_t; 187 188typedef struct 189{ 190 char reserved1 [2]; 191 short remotePort; 192 unsigned short dataLen; 193 struct in_addr remoteAddr; 194 char reserved2 [42]; 195 char data[1]; // actual size is <datalen> 196} BW_writeInfo_t; 197 198typedef struct 199{ 200 short ioport; 201 byte dma; 202 byte vector; 203 byte irq; 204 short bufferSize; 205 short maxWindow; 206 short timeZone; 207 byte myType; 208 int inetAddr; 209 short value; 210 byte subnetMask; 211 short etherPointer; 212 short logserverPointer; 213 short nameserverPointer; 214 short printserverPointer; 215 short timeserverPointer; 216 short gatewayPointer; 217 short driverSegment; 218 byte transferSize; 219 char cardName [9]; 220} BW_ethdevinfo_t; 221 222#pragma pack() 223 224#define LOWMEM_SIZE 4096 225 226static unsigned char *lowmem_buffer; 227static int lowmem_bufseg; 228static int lowmem_bufoff; 229static BW_ethdevinfo_t ethdevinfo; 230static int netmask; 231static struct in_addr bcastaddr; 232 233extern regs_t regs; 234 235static int net_acceptsocket = -1; // socket for fielding new connections 236static int net_controlsocket = 0; 237 238#include "net_bw.h" 239 240//============================================================================= 241 242static int BW_ioctl(int s, char *msg, int msglen) 243{ 244 Q_memcpy(lowmem_buffer, msg, msglen); 245 246 regs.x.ax = 0x4403; 247 regs.x.bx = s; 248 regs.x.cx = msglen; 249 regs.x.dx = lowmem_bufoff; 250 regs.x.ds = lowmem_bufseg; 251 if (dos_int86(0x21)) 252 return regs.x.ax; 253 return 0; 254} 255 256//============================================================================= 257 258static int BW_TranslateError(int error) 259{ 260 switch(error) 261 { 262 case BW_ERR_USR_HANGUP: return ECONNABORTED; 263 case BW_ERR_HANGUP: return EISCONN; 264 case BW_ERR_NET_ERR: return ENOTCONN; 265 case BW_ERR_IS_CLOSED: return ENOTCONN; 266 case BW_ERR_TIME_OUT: return ETIMEDOUT; 267 case BW_ERR_RESET: return ECONNREFUSED; 268 case BW_ERR_FULL: return ETOOMANYREFS; 269 case BW_ERR_BLOCK: return EWOULDBLOCK; 270 case BW_ERR_SHUTDOWN: return ESHUTDOWN; 271 } 272 return EIO; 273} 274 275//============================================================================= 276 277static int GetEthdevinfo(void) 278{ 279 int fd; 280 281 Q_strcpy((char *)lowmem_buffer, "ETHDEV27"); 282 regs.x.ax = 0x3d42; 283 regs.x.ds = lowmem_bufseg; 284 regs.x.dx = lowmem_bufoff; 285 if (dos_int86(0x21)) 286 return -1; 287 fd = regs.x.ax; 288 289 regs.x.ax = 0x4401; 290 regs.x.bx = fd; 291 regs.x.dx = 0x60; 292 dos_int86(0x21); 293 294 regs.h.ah = 0x3f; 295 regs.x.cx = sizeof(ethdevinfo); 296 regs.x.es = regs.x.ds = lowmem_bufseg; 297 regs.x.dx = lowmem_bufoff; 298 regs.x.bx = fd; 299 if (dos_int86(0x21)) 300 return -1; 301 Q_memcpy(ðdevinfo, lowmem_buffer, regs.x.ax); 302 303 regs.h.ah = 0x3e; 304 regs.x.bx = fd; 305 dos_int86(0x21); 306 307 return 0; 308} 309 310//============================================================================= 311 312int BW_Init(void) 313{ 314 struct qsockaddr addr; 315 char *colon; 316 317 if (COM_CheckParm ("-noudp")) 318 return -1; 319 320 lowmem_buffer = dos_getmemory(LOWMEM_SIZE); 321 if (!lowmem_buffer) 322 Sys_Error("not enough low memory\n"); 323 lowmem_bufoff = ptr2real(lowmem_buffer) & 0xf; 324 lowmem_bufseg = ptr2real(lowmem_buffer) >> 4; 325 326 if (GetEthdevinfo()) 327 { 328 Con_DPrintf("Beame & Whiteside TCP/IP not detected\n"); 329 dos_freememory(lowmem_buffer); 330 return -1; 331 } 332 netmask = 0xffffffff >> (32 - ethdevinfo.subnetMask); 333 bcastaddr.s_addr = (ethdevinfo.inetAddr & netmask) | (~netmask); 334 335 if ((net_controlsocket = BW_OpenSocket (0)) == -1) 336 { 337 dos_freememory(lowmem_buffer); 338 Con_DPrintf ("BW_Init unable to open control socket; disabled\n"); 339 return -1; 340 } 341 342 BW_GetSocketAddr (net_controlsocket, &addr); 343 Q_strcpy(my_tcpip_address, BW_AddrToString (&addr)); 344 colon = Q_strrchr (my_tcpip_address, ':'); 345 if (colon) 346 *colon = 0; 347 348 Con_Printf("BW_Init: UDP initialized\n"); 349 tcpipAvailable = true; 350 351 return net_controlsocket; 352} 353 354//============================================================================= 355 356void BW_Shutdown(void) 357{ 358 BW_Listen (false); 359 BW_CloseSocket (net_controlsocket); 360 dos_freememory(lowmem_buffer); 361} 362 363//============================================================================= 364 365void BW_Listen (qboolean state) 366{ 367 // enable listening 368 if (state) 369 { 370 if (net_acceptsocket != -1) 371 return; 372 if ((net_acceptsocket = BW_OpenSocket (net_hostport)) == -1) 373 Sys_Error ("BW_Listen: Unable to open accept socket\n"); 374 return; 375 } 376 377 // disable listening 378 if (net_acceptsocket == -1) 379 return; 380 BW_CloseSocket (net_acceptsocket); 381 net_acceptsocket = -1; 382} 383 384 385//============================================================================= 386 387/* 388OpenSocket returns a handle to a network socket that has been opened, 389set to nonblocking, and bound to <port>. Additional socket options 390should be set here if they are needed. -1 is returned on failure. 391*/ 392 393int BW_OpenSocket(int port) 394{ 395 int s; 396 int ret; 397 int deadman = 3 * 1024; 398 static int dynamic = 1024; 399 static char reuse_msg[2] = {BW_IOCTL_SETOPTIONS, BW_OPTION_REUSEBUFFERS}; 400 static char bind_msg[3] = {BW_IOCTL_BIND, 0, 0}; 401 static char nonblock_msg[2] = {BW_IOCTL_CLEAROPTIONS, BW_OPTION_BLOCKING}; 402 403 // allocate a UDP socket 404 Q_strcpy((char *)lowmem_buffer, "UDP-IP10"); 405 regs.x.ax = 0x3d42; 406 regs.x.ds = lowmem_bufseg; 407 regs.x.dx = lowmem_bufoff; 408 if (dos_int86(0x21)) 409 { 410 Con_Printf("BW_OpenSocket failed: %u\n", BW_TranslateError(regs.x.ax)); 411 return -1; 412 } 413 s = regs.x.ax; 414 415 // set file descriptor to raw mode 416 regs.x.ax = 0x4401; 417 regs.x.bx = s; 418 regs.x.dx = 0x60; 419 dos_int86(0x21); 420 421 if (BW_ioctl(s, reuse_msg, 2)) 422 { 423 Con_Printf("BW_OpenSocket ioctl(reuse) failed\n"); 424 return -1; 425 } 426 427 if (BW_ioctl(s, nonblock_msg, 2)) 428 { 429 Con_Printf("BW_OpenSocket ioctl(nonblocking) failed\n"); 430 return -1; 431 } 432 433 // if a socket was specified, bind to it and return 434 if (port) 435 { 436 *(short *)&bind_msg[1] = port; 437 if (BW_ioctl(s, bind_msg, 3)) 438 { 439 BW_CloseSocket(s); 440 return -1; 441 } 442 return s; 443 } 444 445 // B&W does NOT do dynamic allocation, so if port == 0 we must fake it 446 do 447 { 448 port = dynamic++; 449 if (dynamic == 4096) 450 dynamic = 1024; 451 deadman--; 452 *(short *)&bind_msg[1] = port; 453 ret = BW_ioctl(s, bind_msg, 3); 454 } 455 while (ret && deadman); 456 if (ret) 457 return -1; 458 return s; 459} 460 461//============================================================================= 462 463int BW_CloseSocket(int socket) 464{ 465 regs.h.ah = 0x3e; 466 regs.x.bx = socket; 467 if(dos_int86(0x21)) 468 { 469 Con_Printf("BW_CloseSocket %u failed: %u\n", socket, BW_TranslateError(regs.x.ax)); 470 return -1; 471 } 472 return 0; 473} 474 475//============================================================================= 476 477int BW_Connect (int socket, struct qsockaddr *hostaddr) 478{ 479 return 0; 480} 481 482//============================================================================= 483 484int BW_CheckNewConnections(void) 485{ 486 if (net_acceptsocket == 0) 487 return -1; 488 489 // see if there's anything waiting 490 regs.x.ax = 0x4406; 491 regs.x.bx = net_acceptsocket; 492 dos_int86(0x21); 493 if (regs.x.ax == 0) 494 return -1; 495 return net_acceptsocket; 496} 497 498//============================================================================= 499 500int BW_Read(int s, byte *buf, int len, struct qsockaddr *from) 501{ 502 BW_UDPreadInfo1_t *info1; 503 BW_UDPreadInfo2_t *info2; 504 505 // ask if there's anything waiting 506 regs.x.ax = 0x4406; 507 regs.x.bx = s; 508 dos_int86(0x21); 509 if (regs.x.ax == 0) 510 return 0; 511 512 // there was, so let's get it 513 regs.h.ah = 0x3f; 514 regs.x.cx = /* len + 53 */ LOWMEM_SIZE; 515 regs.x.es = regs.x.ds = lowmem_bufseg; 516 regs.x.dx = lowmem_bufoff; 517 regs.x.bx = s; 518 if (dos_int86(0x21)) 519 { 520 Con_Printf("BW UDP read error: %u\n", BW_TranslateError(regs.x.ax)); 521 return -1; 522 } 523 524 info1 = (BW_UDPreadInfo1_t *)lowmem_buffer; 525 info2 = (BW_UDPreadInfo2_t *)(lowmem_buffer + info1->info2Offset); 526 527 if (from) 528 { 529 from->sa_family = AF_INET; 530 ((struct sockaddr_in *)from)->sin_addr = info1->remoteAddr; 531 ((struct sockaddr_in *)from)->sin_port = htons(info2->remotePort); 532 } 533 534 len = info2->dataLenPlus8 - 8; 535 if (len > NET_DATAGRAMSIZE) 536 { 537 Con_Printf("BW UDP read packet too large: %u\n", len); 538 return -1; 539 } 540 Q_memcpy(buf, info2->data, len); 541 542 return len; 543} 544 545//============================================================================= 546 547int BW_Broadcast(int s, byte *msg, int len) 548{ 549 BW_writeInfo_t *writeInfo; 550 551 // ask if we're clear to send 552 regs.x.ax = 0x4407; 553 regs.x.bx = s; 554 dos_int86(0x21); 555 if (regs.x.ax == 0) 556 return 0; 557 558 // yes, let's do it 559 writeInfo = (BW_writeInfo_t *)lowmem_buffer; 560 writeInfo->remoteAddr = bcastaddr; 561 writeInfo->remotePort = net_hostport; 562 writeInfo->dataLen = len; 563 if (len > NET_DATAGRAMSIZE) 564 Sys_Error("BW UDP write packet too large: %u\n", len); 565 Q_memcpy(writeInfo->data, msg, len); 566 writeInfo->data[len] = 0; 567 regs.h.ah = 0x40; 568 regs.x.bx = s; 569 regs.x.cx = len + sizeof(BW_writeInfo_t); 570 regs.x.es = regs.x.ds = lowmem_bufseg; 571 regs.x.dx = lowmem_bufoff; 572 if (dos_int86(0x21)) 573 { 574 Con_Printf("BW_Broadcast failed: %u\n", BW_TranslateError(regs.x.ax)); 575 return -1; 576 } 577 578 return len; 579} 580 581//============================================================================= 582 583int BW_Write(int s, byte *msg, int len, struct qsockaddr *to) 584{ 585 BW_writeInfo_t *writeInfo; 586 587 // ask if we're clear to send 588 regs.x.ax = 0x4407; 589 regs.x.bx = s; 590 dos_int86(0x21); 591 if (regs.x.ax == 0) 592 return 0; 593 594 // yes, let's do it 595 writeInfo = (BW_writeInfo_t *)lowmem_buffer; 596 writeInfo->remoteAddr = ((struct sockaddr_in *)to)->sin_addr; 597 writeInfo->remotePort = ntohs(((struct sockaddr_in *)to)->sin_port); 598 writeInfo->dataLen = len; 599 if (len > NET_DATAGRAMSIZE) 600 Sys_Error("BW UDP write packet too large: %u\n", len); 601 Q_memcpy(writeInfo->data, msg, len); 602 writeInfo->data[len] = 0; 603 regs.h.ah = 0x40; 604 regs.x.bx = s; 605 regs.x.cx = len + sizeof(BW_writeInfo_t); 606 regs.x.es = regs.x.ds = lowmem_bufseg; 607 regs.x.dx = lowmem_bufoff; 608 if (dos_int86(0x21)) 609 { 610 Con_Printf("BW_Write failed: %u\n", BW_TranslateError(regs.x.ax)); 611 return -1; 612 } 613 614 return len; 615} 616 617//============================================================================= 618 619 620char *BW_AddrToString (struct qsockaddr *addr) 621{ 622 static char buffer[22]; 623 624 sprintf(buffer, "%d.%d.%d.%d:%d", 625 ((struct sockaddr_in *)addr)->sin_addr.s_net, 626 ((struct sockaddr_in *)addr)->sin_addr.s_host, 627 ((struct sockaddr_in *)addr)->sin_addr.s_lh, 628 ((struct sockaddr_in *)addr)->sin_addr.s_impno, 629 ntohs(((struct sockaddr_in *)addr)->sin_port) 630 ); 631 return buffer; 632} 633 634//============================================================================= 635 636int BW_StringToAddr (char *string, struct qsockaddr *addr) 637{ 638 int ha1, ha2, ha3, ha4, hp; 639 int ipaddr; 640 641 sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp); 642 ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4; 643 644 addr->sa_family = AF_INET; 645 ((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr); 646 ((struct sockaddr_in *)addr)->sin_port = htons((short)hp); 647 return 0; 648} 649 650//============================================================================= 651 652int BW_GetSocketAddr (int socket, struct qsockaddr *addr) 653{ 654 regs.x.ax = 0x4402; 655 regs.x.bx = socket; 656 regs.x.cx = sizeof(BW_UDPinfo_t); 657 regs.x.dx = lowmem_bufoff; 658 regs.x.ds = lowmem_bufseg; 659 dos_int86(0x21); 660 661 addr->sa_family = AF_INET; 662 ((struct sockaddr_in *)addr)->sin_addr.s_addr = ((BW_UDPinfo_t *)lowmem_buffer)->localAddr.s_addr; 663 ((struct sockaddr_in *)addr)->sin_port = htons(((BW_UDPinfo_t *)lowmem_buffer)->localPort); 664 665 return 0; 666} 667 668//============================================================================= 669 670int BW_GetNameFromAddr (struct qsockaddr *addr, char *name) 671{ 672 Q_strcpy(name, BW_AddrToString(addr)); 673 return 0; 674} 675 676///============================================================================= 677 678int BW_GetAddrFromName (char *name, struct qsockaddr *hostaddr) 679{ 680 char buff[MAXHOSTNAMELEN]; 681 char *b; 682 int addr; 683 int num; 684 int mask; 685 int run; 686 int port; 687 688 if (name[0] < '0' || name[0] > '9') 689 return -1; 690 691 buff[0] = '.'; 692 b = buff; 693 Q_strcpy(buff+1, name); 694 if (buff[1] == '.') 695 b++; 696 697 addr = 0; 698 mask = -1; 699 while (*b == '.') 700 { 701 b++; 702 num = 0; 703 run = 0; 704 while (!( *b < '0' || *b > '9')) 705 { 706 num = num*10 + *b++ - '0'; 707 if (++run > 3) 708 return -1; 709 } 710 if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0) 711 return -1; 712 if (num < 0 || num > 255) 713 return -1; 714 mask<<=8; 715 addr = (addr<<8) + num; 716 } 717 addr = htonl(addr); 718 mask = htonl(mask); 719 720 if (*b++ == ':') 721 port = Q_atoi(b); 722 else 723 port = net_hostport; 724 725 hostaddr->sa_family = AF_INET; 726 ((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port); 727 ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr = 728 ((ethdevinfo.inetAddr & mask) | addr); 729 730 return 0; 731} 732 733//============================================================================= 734 735int BW_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2) 736{ 737 if (addr1->sa_family != addr2->sa_family) 738 return -1; 739 740 if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr) 741 return -1; 742 743 if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port) 744 return 1; 745 746 return 0; 747} 748 749//============================================================================= 750 751int BW_GetSocketPort (struct qsockaddr *addr) 752{ 753 return ntohs(((struct sockaddr_in *)addr)->sin_port); 754} 755 756 757int BW_SetSocketPort (struct qsockaddr *addr, int port) 758{ 759 ((struct sockaddr_in *)addr)->sin_port = htons(port); 760 return 0; 761} 762 763//============================================================================= 764