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-rw-r--r--WinQuake/net_bw.c1526
1 files changed, 763 insertions, 763 deletions
diff --git a/WinQuake/net_bw.c b/WinQuake/net_bw.c
index 2fb3e06..360a4ee 100644
--- a/WinQuake/net_bw.c
+++ b/WinQuake/net_bw.c
@@ -1,763 +1,763 @@
-/*
-Copyright (C) 1996-1997 Id Software, Inc.
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-
-See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-*/
-// net_bw.c
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <dpmi.h>
-
-#include "quakedef.h"
-#include "dosisms.h"
-
-
-// this section is general Unix stuff that we need
-
-#define EIO 5 /* I/O error */
-#define EBADS 9
-#define EWOULDBLOCK 35 /* function would block */
-#define EMSGSIZE 40 /* message to big for buffers */
-#define EPROTONOSUPPORT 43 /* Protocol not supported */
-#define ESOCKTNOSUPPORT 44 /* Socket type not supported */
-#define EPFNOSUPPORT 46 /* Protocol family not supported */
-#define EAFNOSUPPORT 47 /* Address family not supported */
-#define ECONNABORTED 53 /* User requested hangup */
-#define ENOBUFS 55 /* No buffers available */
-#define EISCONN 56 /* Socket has closed */
-#define ENOTCONN 57 /* Socket is not connected */
-#define ESHUTDOWN 58 /* Socket is closed */
-#define ETOOMANYREFS 59 /* Too many sockets open */
-#define ETIMEDOUT 60 /* Connection timed out */
-#define ECONNREFUSED 61 /* Connection refused */
-
-#define AF_INET 2 /* internet */
-
-#define PF_INET AF_INET
-
-#define SOCK_STREAM 1 /* stream */
-#define SOCK_DGRAM 2 /* datagram */
-
-#define IPPROTO_TCP 6
-#define IPPROTO_UDP 17
-
-#define INADDR_ANY 0
-
-#define SIOCDONE 0x7300
-#define FIONREAD 0x667f
-#define FIONBIO 0x667e
-#define FIONWIN 0x1000
-#define FIONTIN 0x2000
-
-#define BRDINIT 0
-#define BRDADDR 10
-
-#define MAXHOSTNAMELEN 256
-
-#define SOL_SOCKET 0xffff /* options for socket level */
-
-/*
- * Option flags per-socket.
- */
-#define SO_DEBUG 0x0001 /* turn on debugging info recording */
-#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
-#define SO_REUSEADDR 0x0004 /* allow local address reuse */
-#define SO_KEEPALIVE 0x0008 /* keep connections alive */
-#define SO_DONTROUTE 0x0010 /* just use interface addresses */
-#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
-#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
-#define SO_LINGER 0x0080 /* linger on close if data present */
-#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
-#define SO_USEPRIV 0x4000 /* allocate from privileged port area */
-#define SO_CANTSIG 0x8000 /* prevent SIGPIPE on SS_CANTSENDMORE */
-
-/*
- * Additional options, not kept in so_options.
- */
-#define SO_SNDBUF 0x1001 /* send buffer size */
-#define SO_RCVBUF 0x1002 /* receive buffer size */
-#define SO_SNDLOWAT 0x1003 /* send low-water mark */
-#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
-#define SO_SNDTIMEO 0x1005 /* send timeout */
-#define SO_RCVTIMEO 0x1006 /* receive timeout */
-#define SO_ERROR 0x1007 /* get error status and clear */
-#define SO_TYPE 0x1008 /* get socket type */
-
-
-struct in_addr
-{
- union
- {
- struct { unsigned char s_b1,s_b2,s_b3,s_b4; } S_un_b;
- struct { unsigned short s_w1,s_w2; } S_un_w;
- unsigned long S_addr;
- } S_un;
-};
-#define s_addr S_un.S_addr /* can be used for most tcp & ip code */
-#define s_host S_un.S_un_b.s_b2 /* host on imp */
-#define s_net S_un.S_un_b.s_b1 /* network */
-#define s_imp S_un.S_un_w.s_w2 /* imp */
-#define s_impno S_un.S_un_b.s_b4 /* imp # */
-#define s_lh S_un.S_un_b.s_b3 /* logical host */
-
-struct sockaddr_in
-{
- short sin_family;
- unsigned short sin_port;
- struct in_addr sin_addr;
- char sin_zero[8];
-};
-
-struct hostent {
- char *h_name; /* official name of host */
- char **h_aliases; /* alias list */
- int h_addrtype; /* host address type */
- int h_length; /* length of address */
- char **h_addr_list; /* list of addresses from name server */
-#define h_addr h_addr_list[0] /* address, for backward compatiblity */
-};
-
-char *inet_ntoa(struct in_addr in);
-
-
-// this section is B&W specific constants & structures
-
-#define BW_IOCTL_BIND 0
-#define BW_IOCTL_CLEAROPTIONS 5
-#define BW_IOCTL_SETOPTIONS 6
-#define BW_IOCTL_PEEK 7
-#define BW_IOCTL_SETWINMASK 8
-
-#define BW_OPTION_BLOCKING 0x01
-#define BW_OPTION_REUSEBUFFERS 0x80
-
-#define BW_ERR_USR_HANGUP 50
-#define BW_ERR_HANGUP 51
-#define BW_ERR_NET_ERR 52
-#define BW_ERR_IS_CLOSED 53
-#define BW_ERR_TIME_OUT 54
-#define BW_ERR_RESET 55
-#define BW_ERR_FULL 56
-#define BW_ERR_BLOCK 57
-#define BW_ERR_SHUTDOWN 58
-
-#pragma pack(1)
-
-typedef struct
-{
- char state; // always 1
- short localPort;
- struct in_addr localAddr;
- char reason; // always 0
- char options;
- short dataAvailable;
-} BW_UDPinfo_t;
-
-typedef struct
-{
- char reserved1 [6];
- unsigned short info2Offset;
- char reserved2 [18];
- struct in_addr remoteAddr;
-} BW_UDPreadInfo1_t;
-
-typedef struct
-{
- short remotePort;
- char reserved1 [2];
- unsigned short dataLenPlus8;
- char reserved2 [2];
- char data[1]; // actual size is <dataLenPlus8> - 8
-} BW_UDPreadInfo2_t;
-
-typedef struct
-{
- char reserved1 [2];
- short remotePort;
- unsigned short dataLen;
- struct in_addr remoteAddr;
- char reserved2 [42];
- char data[1]; // actual size is <datalen>
-} BW_writeInfo_t;
-
-typedef struct
-{
- short ioport;
- byte dma;
- byte vector;
- byte irq;
- short bufferSize;
- short maxWindow;
- short timeZone;
- byte myType;
- int inetAddr;
- short value;
- byte subnetMask;
- short etherPointer;
- short logserverPointer;
- short nameserverPointer;
- short printserverPointer;
- short timeserverPointer;
- short gatewayPointer;
- short driverSegment;
- byte transferSize;
- char cardName [9];
-} BW_ethdevinfo_t;
-
-#pragma pack()
-
-#define LOWMEM_SIZE 4096
-
-static unsigned char *lowmem_buffer;
-static int lowmem_bufseg;
-static int lowmem_bufoff;
-static BW_ethdevinfo_t ethdevinfo;
-static int netmask;
-static struct in_addr bcastaddr;
-
-extern regs_t regs;
-
-static int net_acceptsocket = -1; // socket for fielding new connections
-static int net_controlsocket = 0;
-
-#include "net_bw.h"
-
-//=============================================================================
-
-static int BW_ioctl(int s, char *msg, int msglen)
-{
- Q_memcpy(lowmem_buffer, msg, msglen);
-
- regs.x.ax = 0x4403;
- regs.x.bx = s;
- regs.x.cx = msglen;
- regs.x.dx = lowmem_bufoff;
- regs.x.ds = lowmem_bufseg;
- if (dos_int86(0x21))
- return regs.x.ax;
- return 0;
-}
-
-//=============================================================================
-
-static int BW_TranslateError(int error)
-{
- switch(error)
- {
- case BW_ERR_USR_HANGUP: return ECONNABORTED;
- case BW_ERR_HANGUP: return EISCONN;
- case BW_ERR_NET_ERR: return ENOTCONN;
- case BW_ERR_IS_CLOSED: return ENOTCONN;
- case BW_ERR_TIME_OUT: return ETIMEDOUT;
- case BW_ERR_RESET: return ECONNREFUSED;
- case BW_ERR_FULL: return ETOOMANYREFS;
- case BW_ERR_BLOCK: return EWOULDBLOCK;
- case BW_ERR_SHUTDOWN: return ESHUTDOWN;
- }
- return EIO;
-}
-
-//=============================================================================
-
-static int GetEthdevinfo(void)
-{
- int fd;
-
- Q_strcpy((char *)lowmem_buffer, "ETHDEV27");
- regs.x.ax = 0x3d42;
- regs.x.ds = lowmem_bufseg;
- regs.x.dx = lowmem_bufoff;
- if (dos_int86(0x21))
- return -1;
- fd = regs.x.ax;
-
- regs.x.ax = 0x4401;
- regs.x.bx = fd;
- regs.x.dx = 0x60;
- dos_int86(0x21);
-
- regs.h.ah = 0x3f;
- regs.x.cx = sizeof(ethdevinfo);
- regs.x.es = regs.x.ds = lowmem_bufseg;
- regs.x.dx = lowmem_bufoff;
- regs.x.bx = fd;
- if (dos_int86(0x21))
- return -1;
- Q_memcpy(&ethdevinfo, lowmem_buffer, regs.x.ax);
-
- regs.h.ah = 0x3e;
- regs.x.bx = fd;
- dos_int86(0x21);
-
- return 0;
-}
-
-//=============================================================================
-
-int BW_Init(void)
-{
- struct qsockaddr addr;
- char *colon;
-
- if (COM_CheckParm ("-noudp"))
- return -1;
-
- lowmem_buffer = dos_getmemory(LOWMEM_SIZE);
- if (!lowmem_buffer)
- Sys_Error("not enough low memory\n");
- lowmem_bufoff = ptr2real(lowmem_buffer) & 0xf;
- lowmem_bufseg = ptr2real(lowmem_buffer) >> 4;
-
- if (GetEthdevinfo())
- {
- Con_DPrintf("Beame & Whiteside TCP/IP not detected\n");
- dos_freememory(lowmem_buffer);
- return -1;
- }
- netmask = 0xffffffff >> (32 - ethdevinfo.subnetMask);
- bcastaddr.s_addr = (ethdevinfo.inetAddr & netmask) | (~netmask);
-
- if ((net_controlsocket = BW_OpenSocket (0)) == -1)
- {
- dos_freememory(lowmem_buffer);
- Con_DPrintf ("BW_Init unable to open control socket; disabled\n");
- return -1;
- }
-
- BW_GetSocketAddr (net_controlsocket, &addr);
- Q_strcpy(my_tcpip_address, BW_AddrToString (&addr));
- colon = Q_strrchr (my_tcpip_address, ':');
- if (colon)
- *colon = 0;
-
- Con_Printf("BW_Init: UDP initialized\n");
- tcpipAvailable = true;
-
- return net_controlsocket;
-}
-
-//=============================================================================
-
-void BW_Shutdown(void)
-{
- BW_Listen (false);
- BW_CloseSocket (net_controlsocket);
- dos_freememory(lowmem_buffer);
-}
-
-//=============================================================================
-
-void BW_Listen (qboolean state)
-{
- // enable listening
- if (state)
- {
- if (net_acceptsocket != -1)
- return;
- if ((net_acceptsocket = BW_OpenSocket (net_hostport)) == -1)
- Sys_Error ("BW_Listen: Unable to open accept socket\n");
- return;
- }
-
- // disable listening
- if (net_acceptsocket == -1)
- return;
- BW_CloseSocket (net_acceptsocket);
- net_acceptsocket = -1;
-}
-
-
-//=============================================================================
-
-/*
-OpenSocket returns a handle to a network socket that has been opened,
-set to nonblocking, and bound to <port>. Additional socket options
-should be set here if they are needed. -1 is returned on failure.
-*/
-
-int BW_OpenSocket(int port)
-{
- int s;
- int ret;
- int deadman = 3 * 1024;
- static int dynamic = 1024;
- static char reuse_msg[2] = {BW_IOCTL_SETOPTIONS, BW_OPTION_REUSEBUFFERS};
- static char bind_msg[3] = {BW_IOCTL_BIND, 0, 0};
- static char nonblock_msg[2] = {BW_IOCTL_CLEAROPTIONS, BW_OPTION_BLOCKING};
-
- // allocate a UDP socket
- Q_strcpy((char *)lowmem_buffer, "UDP-IP10");
- regs.x.ax = 0x3d42;
- regs.x.ds = lowmem_bufseg;
- regs.x.dx = lowmem_bufoff;
- if (dos_int86(0x21))
- {
- Con_Printf("BW_OpenSocket failed: %u\n", BW_TranslateError(regs.x.ax));
- return -1;
- }
- s = regs.x.ax;
-
- // set file descriptor to raw mode
- regs.x.ax = 0x4401;
- regs.x.bx = s;
- regs.x.dx = 0x60;
- dos_int86(0x21);
-
- if (BW_ioctl(s, reuse_msg, 2))
- {
- Con_Printf("BW_OpenSocket ioctl(reuse) failed\n");
- return -1;
- }
-
- if (BW_ioctl(s, nonblock_msg, 2))
- {
- Con_Printf("BW_OpenSocket ioctl(nonblocking) failed\n");
- return -1;
- }
-
- // if a socket was specified, bind to it and return
- if (port)
- {
- *(short *)&bind_msg[1] = port;
- if (BW_ioctl(s, bind_msg, 3))
- {
- BW_CloseSocket(s);
- return -1;
- }
- return s;
- }
-
- // B&W does NOT do dynamic allocation, so if port == 0 we must fake it
- do
- {
- port = dynamic++;
- if (dynamic == 4096)
- dynamic = 1024;
- deadman--;
- *(short *)&bind_msg[1] = port;
- ret = BW_ioctl(s, bind_msg, 3);
- }
- while (ret && deadman);
- if (ret)
- return -1;
- return s;
-}
-
-//=============================================================================
-
-int BW_CloseSocket(int socket)
-{
- regs.h.ah = 0x3e;
- regs.x.bx = socket;
- if(dos_int86(0x21))
- {
- Con_Printf("BW_CloseSocket %u failed: %u\n", socket, BW_TranslateError(regs.x.ax));
- return -1;
- }
- return 0;
-}
-
-//=============================================================================
-
-int BW_Connect (int socket, struct qsockaddr *hostaddr)
-{
- return 0;
-}
-
-//=============================================================================
-
-int BW_CheckNewConnections(void)
-{
- if (net_acceptsocket == 0)
- return -1;
-
- // see if there's anything waiting
- regs.x.ax = 0x4406;
- regs.x.bx = net_acceptsocket;
- dos_int86(0x21);
- if (regs.x.ax == 0)
- return -1;
- return net_acceptsocket;
-}
-
-//=============================================================================
-
-int BW_Read(int s, byte *buf, int len, struct qsockaddr *from)
-{
- BW_UDPreadInfo1_t *info1;
- BW_UDPreadInfo2_t *info2;
-
- // ask if there's anything waiting
- regs.x.ax = 0x4406;
- regs.x.bx = s;
- dos_int86(0x21);
- if (regs.x.ax == 0)
- return 0;
-
- // there was, so let's get it
- regs.h.ah = 0x3f;
- regs.x.cx = /* len + 53 */ LOWMEM_SIZE;
- regs.x.es = regs.x.ds = lowmem_bufseg;
- regs.x.dx = lowmem_bufoff;
- regs.x.bx = s;
- if (dos_int86(0x21))
- {
- Con_Printf("BW UDP read error: %u\n", BW_TranslateError(regs.x.ax));
- return -1;
- }
-
- info1 = (BW_UDPreadInfo1_t *)lowmem_buffer;
- info2 = (BW_UDPreadInfo2_t *)(lowmem_buffer + info1->info2Offset);
-
- if (from)
- {
- from->sa_family = AF_INET;
- ((struct sockaddr_in *)from)->sin_addr = info1->remoteAddr;
- ((struct sockaddr_in *)from)->sin_port = htons(info2->remotePort);
- }
-
- len = info2->dataLenPlus8 - 8;
- if (len > NET_DATAGRAMSIZE)
- {
- Con_Printf("BW UDP read packet too large: %u\n", len);
- return -1;
- }
- Q_memcpy(buf, info2->data, len);
-
- return len;
-}
-
-//=============================================================================
-
-int BW_Broadcast(int s, byte *msg, int len)
-{
- BW_writeInfo_t *writeInfo;
-
- // ask if we're clear to send
- regs.x.ax = 0x4407;
- regs.x.bx = s;
- dos_int86(0x21);
- if (regs.x.ax == 0)
- return 0;
-
- // yes, let's do it
- writeInfo = (BW_writeInfo_t *)lowmem_buffer;
- writeInfo->remoteAddr = bcastaddr;
- writeInfo->remotePort = net_hostport;
- writeInfo->dataLen = len;
- if (len > NET_DATAGRAMSIZE)
- Sys_Error("BW UDP write packet too large: %u\n", len);
- Q_memcpy(writeInfo->data, msg, len);
- writeInfo->data[len] = 0;
- regs.h.ah = 0x40;
- regs.x.bx = s;
- regs.x.cx = len + sizeof(BW_writeInfo_t);
- regs.x.es = regs.x.ds = lowmem_bufseg;
- regs.x.dx = lowmem_bufoff;
- if (dos_int86(0x21))
- {
- Con_Printf("BW_Broadcast failed: %u\n", BW_TranslateError(regs.x.ax));
- return -1;
- }
-
- return len;
-}
-
-//=============================================================================
-
-int BW_Write(int s, byte *msg, int len, struct qsockaddr *to)
-{
- BW_writeInfo_t *writeInfo;
-
- // ask if we're clear to send
- regs.x.ax = 0x4407;
- regs.x.bx = s;
- dos_int86(0x21);
- if (regs.x.ax == 0)
- return 0;
-
- // yes, let's do it
- writeInfo = (BW_writeInfo_t *)lowmem_buffer;
- writeInfo->remoteAddr = ((struct sockaddr_in *)to)->sin_addr;
- writeInfo->remotePort = ntohs(((struct sockaddr_in *)to)->sin_port);
- writeInfo->dataLen = len;
- if (len > NET_DATAGRAMSIZE)
- Sys_Error("BW UDP write packet too large: %u\n", len);
- Q_memcpy(writeInfo->data, msg, len);
- writeInfo->data[len] = 0;
- regs.h.ah = 0x40;
- regs.x.bx = s;
- regs.x.cx = len + sizeof(BW_writeInfo_t);
- regs.x.es = regs.x.ds = lowmem_bufseg;
- regs.x.dx = lowmem_bufoff;
- if (dos_int86(0x21))
- {
- Con_Printf("BW_Write failed: %u\n", BW_TranslateError(regs.x.ax));
- return -1;
- }
-
- return len;
-}
-
-//=============================================================================
-
-
-char *BW_AddrToString (struct qsockaddr *addr)
-{
- static char buffer[22];
-
- sprintf(buffer, "%d.%d.%d.%d:%d",
- ((struct sockaddr_in *)addr)->sin_addr.s_net,
- ((struct sockaddr_in *)addr)->sin_addr.s_host,
- ((struct sockaddr_in *)addr)->sin_addr.s_lh,
- ((struct sockaddr_in *)addr)->sin_addr.s_impno,
- ntohs(((struct sockaddr_in *)addr)->sin_port)
- );
- return buffer;
-}
-
-//=============================================================================
-
-int BW_StringToAddr (char *string, struct qsockaddr *addr)
-{
- int ha1, ha2, ha3, ha4, hp;
- int ipaddr;
-
- sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);
- ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
-
- addr->sa_family = AF_INET;
- ((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);
- ((struct sockaddr_in *)addr)->sin_port = htons((short)hp);
- return 0;
-}
-
-//=============================================================================
-
-int BW_GetSocketAddr (int socket, struct qsockaddr *addr)
-{
- regs.x.ax = 0x4402;
- regs.x.bx = socket;
- regs.x.cx = sizeof(BW_UDPinfo_t);
- regs.x.dx = lowmem_bufoff;
- regs.x.ds = lowmem_bufseg;
- dos_int86(0x21);
-
- addr->sa_family = AF_INET;
- ((struct sockaddr_in *)addr)->sin_addr.s_addr = ((BW_UDPinfo_t *)lowmem_buffer)->localAddr.s_addr;
- ((struct sockaddr_in *)addr)->sin_port = htons(((BW_UDPinfo_t *)lowmem_buffer)->localPort);
-
- return 0;
-}
-
-//=============================================================================
-
-int BW_GetNameFromAddr (struct qsockaddr *addr, char *name)
-{
- Q_strcpy(name, BW_AddrToString(addr));
- return 0;
-}
-
-///=============================================================================
-
-int BW_GetAddrFromName (char *name, struct qsockaddr *hostaddr)
-{
- char buff[MAXHOSTNAMELEN];
- char *b;
- int addr;
- int num;
- int mask;
- int run;
- int port;
-
- if (name[0] < '0' || name[0] > '9')
- return -1;
-
- buff[0] = '.';
- b = buff;
- Q_strcpy(buff+1, name);
- if (buff[1] == '.')
- b++;
-
- addr = 0;
- mask = -1;
- while (*b == '.')
- {
- b++;
- num = 0;
- run = 0;
- while (!( *b < '0' || *b > '9'))
- {
- num = num*10 + *b++ - '0';
- if (++run > 3)
- return -1;
- }
- if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
- return -1;
- if (num < 0 || num > 255)
- return -1;
- mask<<=8;
- addr = (addr<<8) + num;
- }
- addr = htonl(addr);
- mask = htonl(mask);
-
- if (*b++ == ':')
- port = Q_atoi(b);
- else
- port = net_hostport;
-
- hostaddr->sa_family = AF_INET;
- ((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port);
- ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr =
- ((ethdevinfo.inetAddr & mask) | addr);
-
- return 0;
-}
-
-//=============================================================================
-
-int BW_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
-{
- if (addr1->sa_family != addr2->sa_family)
- return -1;
-
- if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr)
- return -1;
-
- if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port)
- return 1;
-
- return 0;
-}
-
-//=============================================================================
-
-int BW_GetSocketPort (struct qsockaddr *addr)
-{
- return ntohs(((struct sockaddr_in *)addr)->sin_port);
-}
-
-
-int BW_SetSocketPort (struct qsockaddr *addr, int port)
-{
- ((struct sockaddr_in *)addr)->sin_port = htons(port);
- return 0;
-}
-
-//=============================================================================
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+*/
+// net_bw.c
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <dpmi.h>
+
+#include "quakedef.h"
+#include "dosisms.h"
+
+
+// this section is general Unix stuff that we need
+
+#define EIO 5 /* I/O error */
+#define EBADS 9
+#define EWOULDBLOCK 35 /* function would block */
+#define EMSGSIZE 40 /* message to big for buffers */
+#define EPROTONOSUPPORT 43 /* Protocol not supported */
+#define ESOCKTNOSUPPORT 44 /* Socket type not supported */
+#define EPFNOSUPPORT 46 /* Protocol family not supported */
+#define EAFNOSUPPORT 47 /* Address family not supported */
+#define ECONNABORTED 53 /* User requested hangup */
+#define ENOBUFS 55 /* No buffers available */
+#define EISCONN 56 /* Socket has closed */
+#define ENOTCONN 57 /* Socket is not connected */
+#define ESHUTDOWN 58 /* Socket is closed */
+#define ETOOMANYREFS 59 /* Too many sockets open */
+#define ETIMEDOUT 60 /* Connection timed out */
+#define ECONNREFUSED 61 /* Connection refused */
+
+#define AF_INET 2 /* internet */
+
+#define PF_INET AF_INET
+
+#define SOCK_STREAM 1 /* stream */
+#define SOCK_DGRAM 2 /* datagram */
+
+#define IPPROTO_TCP 6
+#define IPPROTO_UDP 17
+
+#define INADDR_ANY 0
+
+#define SIOCDONE 0x7300
+#define FIONREAD 0x667f
+#define FIONBIO 0x667e
+#define FIONWIN 0x1000
+#define FIONTIN 0x2000
+
+#define BRDINIT 0
+#define BRDADDR 10
+
+#define MAXHOSTNAMELEN 256
+
+#define SOL_SOCKET 0xffff /* options for socket level */
+
+/*
+ * Option flags per-socket.
+ */
+#define SO_DEBUG 0x0001 /* turn on debugging info recording */
+#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
+#define SO_REUSEADDR 0x0004 /* allow local address reuse */
+#define SO_KEEPALIVE 0x0008 /* keep connections alive */
+#define SO_DONTROUTE 0x0010 /* just use interface addresses */
+#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
+#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
+#define SO_LINGER 0x0080 /* linger on close if data present */
+#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
+#define SO_USEPRIV 0x4000 /* allocate from privileged port area */
+#define SO_CANTSIG 0x8000 /* prevent SIGPIPE on SS_CANTSENDMORE */
+
+/*
+ * Additional options, not kept in so_options.
+ */
+#define SO_SNDBUF 0x1001 /* send buffer size */
+#define SO_RCVBUF 0x1002 /* receive buffer size */
+#define SO_SNDLOWAT 0x1003 /* send low-water mark */
+#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
+#define SO_SNDTIMEO 0x1005 /* send timeout */
+#define SO_RCVTIMEO 0x1006 /* receive timeout */
+#define SO_ERROR 0x1007 /* get error status and clear */
+#define SO_TYPE 0x1008 /* get socket type */
+
+
+struct in_addr
+{
+ union
+ {
+ struct { unsigned char s_b1,s_b2,s_b3,s_b4; } S_un_b;
+ struct { unsigned short s_w1,s_w2; } S_un_w;
+ unsigned long S_addr;
+ } S_un;
+};
+#define s_addr S_un.S_addr /* can be used for most tcp & ip code */
+#define s_host S_un.S_un_b.s_b2 /* host on imp */
+#define s_net S_un.S_un_b.s_b1 /* network */
+#define s_imp S_un.S_un_w.s_w2 /* imp */
+#define s_impno S_un.S_un_b.s_b4 /* imp # */
+#define s_lh S_un.S_un_b.s_b3 /* logical host */
+
+struct sockaddr_in
+{
+ short sin_family;
+ unsigned short sin_port;
+ struct in_addr sin_addr;
+ char sin_zero[8];
+};
+
+struct hostent {
+ char *h_name; /* official name of host */
+ char **h_aliases; /* alias list */
+ int h_addrtype; /* host address type */
+ int h_length; /* length of address */
+ char **h_addr_list; /* list of addresses from name server */
+#define h_addr h_addr_list[0] /* address, for backward compatiblity */
+};
+
+char *inet_ntoa(struct in_addr in);
+
+
+// this section is B&W specific constants & structures
+
+#define BW_IOCTL_BIND 0
+#define BW_IOCTL_CLEAROPTIONS 5
+#define BW_IOCTL_SETOPTIONS 6
+#define BW_IOCTL_PEEK 7
+#define BW_IOCTL_SETWINMASK 8
+
+#define BW_OPTION_BLOCKING 0x01
+#define BW_OPTION_REUSEBUFFERS 0x80
+
+#define BW_ERR_USR_HANGUP 50
+#define BW_ERR_HANGUP 51
+#define BW_ERR_NET_ERR 52
+#define BW_ERR_IS_CLOSED 53
+#define BW_ERR_TIME_OUT 54
+#define BW_ERR_RESET 55
+#define BW_ERR_FULL 56
+#define BW_ERR_BLOCK 57
+#define BW_ERR_SHUTDOWN 58
+
+#pragma pack(1)
+
+typedef struct
+{
+ char state; // always 1
+ short localPort;
+ struct in_addr localAddr;
+ char reason; // always 0
+ char options;
+ short dataAvailable;
+} BW_UDPinfo_t;
+
+typedef struct
+{
+ char reserved1 [6];
+ unsigned short info2Offset;
+ char reserved2 [18];
+ struct in_addr remoteAddr;
+} BW_UDPreadInfo1_t;
+
+typedef struct
+{
+ short remotePort;
+ char reserved1 [2];
+ unsigned short dataLenPlus8;
+ char reserved2 [2];
+ char data[1]; // actual size is <dataLenPlus8> - 8
+} BW_UDPreadInfo2_t;
+
+typedef struct
+{
+ char reserved1 [2];
+ short remotePort;
+ unsigned short dataLen;
+ struct in_addr remoteAddr;
+ char reserved2 [42];
+ char data[1]; // actual size is <datalen>
+} BW_writeInfo_t;
+
+typedef struct
+{
+ short ioport;
+ byte dma;
+ byte vector;
+ byte irq;
+ short bufferSize;
+ short maxWindow;
+ short timeZone;
+ byte myType;
+ int inetAddr;
+ short value;
+ byte subnetMask;
+ short etherPointer;
+ short logserverPointer;
+ short nameserverPointer;
+ short printserverPointer;
+ short timeserverPointer;
+ short gatewayPointer;
+ short driverSegment;
+ byte transferSize;
+ char cardName [9];
+} BW_ethdevinfo_t;
+
+#pragma pack()
+
+#define LOWMEM_SIZE 4096
+
+static unsigned char *lowmem_buffer;
+static int lowmem_bufseg;
+static int lowmem_bufoff;
+static BW_ethdevinfo_t ethdevinfo;
+static int netmask;
+static struct in_addr bcastaddr;
+
+extern regs_t regs;
+
+static int net_acceptsocket = -1; // socket for fielding new connections
+static int net_controlsocket = 0;
+
+#include "net_bw.h"
+
+//=============================================================================
+
+static int BW_ioctl(int s, char *msg, int msglen)
+{
+ Q_memcpy(lowmem_buffer, msg, msglen);
+
+ regs.x.ax = 0x4403;
+ regs.x.bx = s;
+ regs.x.cx = msglen;
+ regs.x.dx = lowmem_bufoff;
+ regs.x.ds = lowmem_bufseg;
+ if (dos_int86(0x21))
+ return regs.x.ax;
+ return 0;
+}
+
+//=============================================================================
+
+static int BW_TranslateError(int error)
+{
+ switch(error)
+ {
+ case BW_ERR_USR_HANGUP: return ECONNABORTED;
+ case BW_ERR_HANGUP: return EISCONN;
+ case BW_ERR_NET_ERR: return ENOTCONN;
+ case BW_ERR_IS_CLOSED: return ENOTCONN;
+ case BW_ERR_TIME_OUT: return ETIMEDOUT;
+ case BW_ERR_RESET: return ECONNREFUSED;
+ case BW_ERR_FULL: return ETOOMANYREFS;
+ case BW_ERR_BLOCK: return EWOULDBLOCK;
+ case BW_ERR_SHUTDOWN: return ESHUTDOWN;
+ }
+ return EIO;
+}
+
+//=============================================================================
+
+static int GetEthdevinfo(void)
+{
+ int fd;
+
+ Q_strcpy((char *)lowmem_buffer, "ETHDEV27");
+ regs.x.ax = 0x3d42;
+ regs.x.ds = lowmem_bufseg;
+ regs.x.dx = lowmem_bufoff;
+ if (dos_int86(0x21))
+ return -1;
+ fd = regs.x.ax;
+
+ regs.x.ax = 0x4401;
+ regs.x.bx = fd;
+ regs.x.dx = 0x60;
+ dos_int86(0x21);
+
+ regs.h.ah = 0x3f;
+ regs.x.cx = sizeof(ethdevinfo);
+ regs.x.es = regs.x.ds = lowmem_bufseg;
+ regs.x.dx = lowmem_bufoff;
+ regs.x.bx = fd;
+ if (dos_int86(0x21))
+ return -1;
+ Q_memcpy(&ethdevinfo, lowmem_buffer, regs.x.ax);
+
+ regs.h.ah = 0x3e;
+ regs.x.bx = fd;
+ dos_int86(0x21);
+
+ return 0;
+}
+
+//=============================================================================
+
+int BW_Init(void)
+{
+ struct qsockaddr addr;
+ char *colon;
+
+ if (COM_CheckParm ("-noudp"))
+ return -1;
+
+ lowmem_buffer = dos_getmemory(LOWMEM_SIZE);
+ if (!lowmem_buffer)
+ Sys_Error("not enough low memory\n");
+ lowmem_bufoff = ptr2real(lowmem_buffer) & 0xf;
+ lowmem_bufseg = ptr2real(lowmem_buffer) >> 4;
+
+ if (GetEthdevinfo())
+ {
+ Con_DPrintf("Beame & Whiteside TCP/IP not detected\n");
+ dos_freememory(lowmem_buffer);
+ return -1;
+ }
+ netmask = 0xffffffff >> (32 - ethdevinfo.subnetMask);
+ bcastaddr.s_addr = (ethdevinfo.inetAddr & netmask) | (~netmask);
+
+ if ((net_controlsocket = BW_OpenSocket (0)) == -1)
+ {
+ dos_freememory(lowmem_buffer);
+ Con_DPrintf ("BW_Init unable to open control socket; disabled\n");
+ return -1;
+ }
+
+ BW_GetSocketAddr (net_controlsocket, &addr);
+ Q_strcpy(my_tcpip_address, BW_AddrToString (&addr));
+ colon = Q_strrchr (my_tcpip_address, ':');
+ if (colon)
+ *colon = 0;
+
+ Con_Printf("BW_Init: UDP initialized\n");
+ tcpipAvailable = true;
+
+ return net_controlsocket;
+}
+
+//=============================================================================
+
+void BW_Shutdown(void)
+{
+ BW_Listen (false);
+ BW_CloseSocket (net_controlsocket);
+ dos_freememory(lowmem_buffer);
+}
+
+//=============================================================================
+
+void BW_Listen (qboolean state)
+{
+ // enable listening
+ if (state)
+ {
+ if (net_acceptsocket != -1)
+ return;
+ if ((net_acceptsocket = BW_OpenSocket (net_hostport)) == -1)
+ Sys_Error ("BW_Listen: Unable to open accept socket\n");
+ return;
+ }
+
+ // disable listening
+ if (net_acceptsocket == -1)
+ return;
+ BW_CloseSocket (net_acceptsocket);
+ net_acceptsocket = -1;
+}
+
+
+//=============================================================================
+
+/*
+OpenSocket returns a handle to a network socket that has been opened,
+set to nonblocking, and bound to <port>. Additional socket options
+should be set here if they are needed. -1 is returned on failure.
+*/
+
+int BW_OpenSocket(int port)
+{
+ int s;
+ int ret;
+ int deadman = 3 * 1024;
+ static int dynamic = 1024;
+ static char reuse_msg[2] = {BW_IOCTL_SETOPTIONS, BW_OPTION_REUSEBUFFERS};
+ static char bind_msg[3] = {BW_IOCTL_BIND, 0, 0};
+ static char nonblock_msg[2] = {BW_IOCTL_CLEAROPTIONS, BW_OPTION_BLOCKING};
+
+ // allocate a UDP socket
+ Q_strcpy((char *)lowmem_buffer, "UDP-IP10");
+ regs.x.ax = 0x3d42;
+ regs.x.ds = lowmem_bufseg;
+ regs.x.dx = lowmem_bufoff;
+ if (dos_int86(0x21))
+ {
+ Con_Printf("BW_OpenSocket failed: %u\n", BW_TranslateError(regs.x.ax));
+ return -1;
+ }
+ s = regs.x.ax;
+
+ // set file descriptor to raw mode
+ regs.x.ax = 0x4401;
+ regs.x.bx = s;
+ regs.x.dx = 0x60;
+ dos_int86(0x21);
+
+ if (BW_ioctl(s, reuse_msg, 2))
+ {
+ Con_Printf("BW_OpenSocket ioctl(reuse) failed\n");
+ return -1;
+ }
+
+ if (BW_ioctl(s, nonblock_msg, 2))
+ {
+ Con_Printf("BW_OpenSocket ioctl(nonblocking) failed\n");
+ return -1;
+ }
+
+ // if a socket was specified, bind to it and return
+ if (port)
+ {
+ *(short *)&bind_msg[1] = port;
+ if (BW_ioctl(s, bind_msg, 3))
+ {
+ BW_CloseSocket(s);
+ return -1;
+ }
+ return s;
+ }
+
+ // B&W does NOT do dynamic allocation, so if port == 0 we must fake it
+ do
+ {
+ port = dynamic++;
+ if (dynamic == 4096)
+ dynamic = 1024;
+ deadman--;
+ *(short *)&bind_msg[1] = port;
+ ret = BW_ioctl(s, bind_msg, 3);
+ }
+ while (ret && deadman);
+ if (ret)
+ return -1;
+ return s;
+}
+
+//=============================================================================
+
+int BW_CloseSocket(int socket)
+{
+ regs.h.ah = 0x3e;
+ regs.x.bx = socket;
+ if(dos_int86(0x21))
+ {
+ Con_Printf("BW_CloseSocket %u failed: %u\n", socket, BW_TranslateError(regs.x.ax));
+ return -1;
+ }
+ return 0;
+}
+
+//=============================================================================
+
+int BW_Connect (int socket, struct qsockaddr *hostaddr)
+{
+ return 0;
+}
+
+//=============================================================================
+
+int BW_CheckNewConnections(void)
+{
+ if (net_acceptsocket == 0)
+ return -1;
+
+ // see if there's anything waiting
+ regs.x.ax = 0x4406;
+ regs.x.bx = net_acceptsocket;
+ dos_int86(0x21);
+ if (regs.x.ax == 0)
+ return -1;
+ return net_acceptsocket;
+}
+
+//=============================================================================
+
+int BW_Read(int s, byte *buf, int len, struct qsockaddr *from)
+{
+ BW_UDPreadInfo1_t *info1;
+ BW_UDPreadInfo2_t *info2;
+
+ // ask if there's anything waiting
+ regs.x.ax = 0x4406;
+ regs.x.bx = s;
+ dos_int86(0x21);
+ if (regs.x.ax == 0)
+ return 0;
+
+ // there was, so let's get it
+ regs.h.ah = 0x3f;
+ regs.x.cx = /* len + 53 */ LOWMEM_SIZE;
+ regs.x.es = regs.x.ds = lowmem_bufseg;
+ regs.x.dx = lowmem_bufoff;
+ regs.x.bx = s;
+ if (dos_int86(0x21))
+ {
+ Con_Printf("BW UDP read error: %u\n", BW_TranslateError(regs.x.ax));
+ return -1;
+ }
+
+ info1 = (BW_UDPreadInfo1_t *)lowmem_buffer;
+ info2 = (BW_UDPreadInfo2_t *)(lowmem_buffer + info1->info2Offset);
+
+ if (from)
+ {
+ from->sa_family = AF_INET;
+ ((struct sockaddr_in *)from)->sin_addr = info1->remoteAddr;
+ ((struct sockaddr_in *)from)->sin_port = htons(info2->remotePort);
+ }
+
+ len = info2->dataLenPlus8 - 8;
+ if (len > NET_DATAGRAMSIZE)
+ {
+ Con_Printf("BW UDP read packet too large: %u\n", len);
+ return -1;
+ }
+ Q_memcpy(buf, info2->data, len);
+
+ return len;
+}
+
+//=============================================================================
+
+int BW_Broadcast(int s, byte *msg, int len)
+{
+ BW_writeInfo_t *writeInfo;
+
+ // ask if we're clear to send
+ regs.x.ax = 0x4407;
+ regs.x.bx = s;
+ dos_int86(0x21);
+ if (regs.x.ax == 0)
+ return 0;
+
+ // yes, let's do it
+ writeInfo = (BW_writeInfo_t *)lowmem_buffer;
+ writeInfo->remoteAddr = bcastaddr;
+ writeInfo->remotePort = net_hostport;
+ writeInfo->dataLen = len;
+ if (len > NET_DATAGRAMSIZE)
+ Sys_Error("BW UDP write packet too large: %u\n", len);
+ Q_memcpy(writeInfo->data, msg, len);
+ writeInfo->data[len] = 0;
+ regs.h.ah = 0x40;
+ regs.x.bx = s;
+ regs.x.cx = len + sizeof(BW_writeInfo_t);
+ regs.x.es = regs.x.ds = lowmem_bufseg;
+ regs.x.dx = lowmem_bufoff;
+ if (dos_int86(0x21))
+ {
+ Con_Printf("BW_Broadcast failed: %u\n", BW_TranslateError(regs.x.ax));
+ return -1;
+ }
+
+ return len;
+}
+
+//=============================================================================
+
+int BW_Write(int s, byte *msg, int len, struct qsockaddr *to)
+{
+ BW_writeInfo_t *writeInfo;
+
+ // ask if we're clear to send
+ regs.x.ax = 0x4407;
+ regs.x.bx = s;
+ dos_int86(0x21);
+ if (regs.x.ax == 0)
+ return 0;
+
+ // yes, let's do it
+ writeInfo = (BW_writeInfo_t *)lowmem_buffer;
+ writeInfo->remoteAddr = ((struct sockaddr_in *)to)->sin_addr;
+ writeInfo->remotePort = ntohs(((struct sockaddr_in *)to)->sin_port);
+ writeInfo->dataLen = len;
+ if (len > NET_DATAGRAMSIZE)
+ Sys_Error("BW UDP write packet too large: %u\n", len);
+ Q_memcpy(writeInfo->data, msg, len);
+ writeInfo->data[len] = 0;
+ regs.h.ah = 0x40;
+ regs.x.bx = s;
+ regs.x.cx = len + sizeof(BW_writeInfo_t);
+ regs.x.es = regs.x.ds = lowmem_bufseg;
+ regs.x.dx = lowmem_bufoff;
+ if (dos_int86(0x21))
+ {
+ Con_Printf("BW_Write failed: %u\n", BW_TranslateError(regs.x.ax));
+ return -1;
+ }
+
+ return len;
+}
+
+//=============================================================================
+
+
+char *BW_AddrToString (struct qsockaddr *addr)
+{
+ static char buffer[22];
+
+ sprintf(buffer, "%d.%d.%d.%d:%d",
+ ((struct sockaddr_in *)addr)->sin_addr.s_net,
+ ((struct sockaddr_in *)addr)->sin_addr.s_host,
+ ((struct sockaddr_in *)addr)->sin_addr.s_lh,
+ ((struct sockaddr_in *)addr)->sin_addr.s_impno,
+ ntohs(((struct sockaddr_in *)addr)->sin_port)
+ );
+ return buffer;
+}
+
+//=============================================================================
+
+int BW_StringToAddr (char *string, struct qsockaddr *addr)
+{
+ int ha1, ha2, ha3, ha4, hp;
+ int ipaddr;
+
+ sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);
+ ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
+
+ addr->sa_family = AF_INET;
+ ((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);
+ ((struct sockaddr_in *)addr)->sin_port = htons((short)hp);
+ return 0;
+}
+
+//=============================================================================
+
+int BW_GetSocketAddr (int socket, struct qsockaddr *addr)
+{
+ regs.x.ax = 0x4402;
+ regs.x.bx = socket;
+ regs.x.cx = sizeof(BW_UDPinfo_t);
+ regs.x.dx = lowmem_bufoff;
+ regs.x.ds = lowmem_bufseg;
+ dos_int86(0x21);
+
+ addr->sa_family = AF_INET;
+ ((struct sockaddr_in *)addr)->sin_addr.s_addr = ((BW_UDPinfo_t *)lowmem_buffer)->localAddr.s_addr;
+ ((struct sockaddr_in *)addr)->sin_port = htons(((BW_UDPinfo_t *)lowmem_buffer)->localPort);
+
+ return 0;
+}
+
+//=============================================================================
+
+int BW_GetNameFromAddr (struct qsockaddr *addr, char *name)
+{
+ Q_strcpy(name, BW_AddrToString(addr));
+ return 0;
+}
+
+///=============================================================================
+
+int BW_GetAddrFromName (char *name, struct qsockaddr *hostaddr)
+{
+ char buff[MAXHOSTNAMELEN];
+ char *b;
+ int addr;
+ int num;
+ int mask;
+ int run;
+ int port;
+
+ if (name[0] < '0' || name[0] > '9')
+ return -1;
+
+ buff[0] = '.';
+ b = buff;
+ Q_strcpy(buff+1, name);
+ if (buff[1] == '.')
+ b++;
+
+ addr = 0;
+ mask = -1;
+ while (*b == '.')
+ {
+ b++;
+ num = 0;
+ run = 0;
+ while (!( *b < '0' || *b > '9'))
+ {
+ num = num*10 + *b++ - '0';
+ if (++run > 3)
+ return -1;
+ }
+ if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
+ return -1;
+ if (num < 0 || num > 255)
+ return -1;
+ mask<<=8;
+ addr = (addr<<8) + num;
+ }
+ addr = htonl(addr);
+ mask = htonl(mask);
+
+ if (*b++ == ':')
+ port = Q_atoi(b);
+ else
+ port = net_hostport;
+
+ hostaddr->sa_family = AF_INET;
+ ((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port);
+ ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr =
+ ((ethdevinfo.inetAddr & mask) | addr);
+
+ return 0;
+}
+
+//=============================================================================
+
+int BW_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
+{
+ if (addr1->sa_family != addr2->sa_family)
+ return -1;
+
+ if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr)
+ return -1;
+
+ if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port)
+ return 1;
+
+ return 0;
+}
+
+//=============================================================================
+
+int BW_GetSocketPort (struct qsockaddr *addr)
+{
+ return ntohs(((struct sockaddr_in *)addr)->sin_port);
+}
+
+
+int BW_SetSocketPort (struct qsockaddr *addr, int port)
+{
+ ((struct sockaddr_in *)addr)->sin_port = htons(port);
+ return 0;
+}
+
+//=============================================================================
generated by cgit v1.2.3 (git 2.39.1) at 2026-10-06 00:28:56 +0000