ref: cd8c8d416b4245458460cfe8e3c00bcb69c3c45b
dir: /u/net_ipx.c/
/*
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_ipx.c
#include <stdio.h>
#include <stdlib.h>
#include <dpmi.h>
#include "quakedef.h"
#include "dosisms.h"
#include "net_ipx.h"
#define EIO 5 /* I/O error */
#define AF_NETWARE 64
#define IPX_OPEN 0
#define IPX_CLOSE 1
#define IPX_GETROUTE 2
#define IPX_SEND 3
#define IPX_LISTEN 4
#define IPX_SCHEDULEEVENT 5
#define IPX_CANCEL 6
#define IPX_SCHEDULESPECIALEVENT 7
#define IPX_GETINTERVALMARKER 8
#define IPX_GETADDRESS 9
#define IPX_RELINQUISH 10
#define PTYPE_UNKNOWN 0
#define PTYPE_RIP 1
#define PTYPE_ECHO 2
#define PTYPE_ERROR 3
#define PTYPE_IPX 4
#define PTYPE_SPX 5
#pragma pack(1)
typedef struct
{
byte network[4];
byte node[6];
short socket;
} IPXaddr;
struct sockaddr_ipx
{
short sipx_family;
IPXaddr sipx_addr;
char sipx_zero[2];
};
#define sipx_port sipx_addr.socket
typedef struct
{
short checkSum;
short length;
byte transportControl;
byte type;
IPXaddr destination;
IPXaddr source;
} IPXheader;
typedef struct ECBStructure
{
struct ECBStructure *link;
unsigned short ESR_off;
unsigned short ESR_seg;
byte inUse;
byte completionCode;
short socket;
byte IPXWorkspace[4];
byte driverWorkspace[12];
byte immediateAddress[6];
short fragCount;
short fragOff;
short fragSeg;
short fragSize;
} ECB;
#pragma pack()
typedef struct
{
ECB ecb;
IPXheader header;
int sequence;
char data[NET_DATAGRAMSIZE];
} ipx_lowmem_buffer_t;
#define LOWMEMSIZE (100 * 1024)
#define LOWMEMSAVE 256
#define IPXBUFFERS ((LOWMEMSIZE - LOWMEMSAVE)/ sizeof(ipx_lowmem_buffer_t))
#define IPXSOCKBUFFERS 5
#define IPXSOCKETS (IPXBUFFERS / IPXSOCKBUFFERS)
// each socket's socketbuffer 0 is used for sending, the others for listening
typedef struct
{
char reserved[LOWMEMSAVE];
ipx_lowmem_buffer_t socketbuffer[IPXSOCKETS][IPXSOCKBUFFERS];
} ipx_lowmem_area_t;
static int ipxsocket[IPXSOCKETS];
static ECB *readlist[IPXSOCKETS];
static int sequence[IPXSOCKETS];
static int handlesInUse;
static ipx_lowmem_area_t *lma;
static char *lowmem_buffer;
static int lowmem_bufseg;
static int lowmem_bufoff;
static unsigned short ipx_cs;
static unsigned short ipx_ip;
static int net_acceptsocket = -1;
static int net_controlsocket;
static void IPX_PollProcedure(void);
static PollProcedure pollProcedure = {NULL, 0.0, IPX_PollProcedure};
//=============================================================================
static void IPX_GetLocalAddress(IPXaddr *addr)
{
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_GETADDRESS;
regs.x.es = lowmem_bufseg;
regs.x.si = lowmem_bufoff;
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
Q_memcpy(addr, lowmem_buffer, 10);
}
//=============================================================================
static int IPX_GetLocalTarget(IPXaddr *addr, byte *localTarget)
{
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_GETROUTE;
regs.x.es = lowmem_bufseg;
regs.x.si = lowmem_bufoff;
regs.x.di = lowmem_bufoff + sizeof(IPXaddr);
Q_memcpy(lowmem_buffer, addr, sizeof(IPXaddr));
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
if (regs.h.al)
return -1;
Q_memcpy(localTarget, lowmem_buffer + sizeof(IPXaddr), 6);
return 0;
}
//=============================================================================
static void IPX_ListenForPacket(ECB *ecb)
{
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_LISTEN;
regs.x.es = ptr2real(ecb) >> 4;
regs.x.si = ptr2real(ecb) & 0xf;
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
}
//=============================================================================
static void IPX_RelinquishControl(void)
{
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_RELINQUISH;
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
}
void IPX_PollProcedure(void)
{
IPX_RelinquishControl();
SchedulePollProcedure(&pollProcedure, 0.01);
}
//=============================================================================
static void ProcessReadyList(int s)
{
int n;
ECB *ecb;
ECB *prev;
for (n = 1; n < IPXSOCKBUFFERS; n++)
{
if (lma->socketbuffer[s][n].ecb.inUse == 0)
{
for (ecb = readlist[s], prev = NULL; ecb; ecb = ecb->link)
{
if (lma->socketbuffer[s][n].sequence < ((ipx_lowmem_buffer_t *) ecb)->sequence)
break;
prev = ecb;
}
if (ecb)
lma->socketbuffer[s][n].ecb.link = ecb;
else
lma->socketbuffer[s][n].ecb.link = NULL;
if (prev)
prev->link = &lma->socketbuffer[s][n].ecb;
else
readlist[s] = &lma->socketbuffer[s][n].ecb;
lma->socketbuffer[s][n].ecb.inUse = 0xff;
}
}
}
//=============================================================================
int IPX_Init(void)
{
int s;
int n;
struct qsockaddr addr;
char *colon;
if (COM_CheckParm ("-noipx"))
return -1;
// find the IPX far call entry point
regs.x.ax = 0x7a00;
__dpmi_simulate_real_mode_interrupt (0x2f, (__dpmi_regs *)®s);
if (regs.h.al != 0xff)
{
Con_Printf("IPX not detected\n");
return -1;
}
ipx_cs = regs.x.es;
ipx_ip = regs.x.di;
// grab a chunk of memory down in DOS land
lowmem_buffer = dos_getmemory(LOWMEMSIZE);
if (!lowmem_buffer)
{
Con_Printf("IPX_Init: Not enough low memory\n");
return -1;
}
lowmem_bufoff = ptr2real(lowmem_buffer) & 0xf;
lowmem_bufseg = ptr2real(lowmem_buffer) >> 4;
// init socket handles & buffers
handlesInUse = 0;
lma = (ipx_lowmem_area_t *)lowmem_buffer;
for (s = 0; s < IPXSOCKETS; s++)
{
ipxsocket[s] = 0;
for (n = 0; n < IPXSOCKBUFFERS; n++)
{
lma->socketbuffer[s][n].ecb.link = NULL;
lma->socketbuffer[s][n].ecb.ESR_off = 0;
lma->socketbuffer[s][n].ecb.ESR_seg = 0;
lma->socketbuffer[s][n].ecb.socket = 0;
lma->socketbuffer[s][n].ecb.inUse = 0xff;
lma->socketbuffer[s][n].ecb.completionCode = 0;
lma->socketbuffer[s][n].ecb.fragCount = 1;
lma->socketbuffer[s][n].ecb.fragOff = ptr2real(&lma->socketbuffer[s][n].header) & 0xf;
lma->socketbuffer[s][n].ecb.fragSeg = ptr2real(&lma->socketbuffer[s][n].header) >> 4;
lma->socketbuffer[s][n].ecb.fragSize = sizeof(IPXheader) + sizeof(int) + NET_DATAGRAMSIZE;
}
}
if ((net_controlsocket = IPX_OpenSocket (0)) == -1)
{
dos_freememory(lowmem_buffer);
Con_DPrintf ("IPX_Init: Unable to open control socket\n");
return -1;
}
SchedulePollProcedure(&pollProcedure, 0.01);
IPX_GetSocketAddr (net_controlsocket, &addr);
Q_strcpy(my_ipx_address, IPX_AddrToString (&addr));
colon = Q_strrchr (my_ipx_address, ':');
if (colon)
*colon = 0;
Con_Printf("IPX initialized\n");
ipxAvailable = true;
return net_controlsocket;
}
//=============================================================================
void IPX_Shutdown(void)
{
IPX_Listen (false);
IPX_CloseSocket (net_controlsocket);
dos_freememory(lowmem_buffer);
}
//=============================================================================
void IPX_Listen (qboolean state)
{
// enable listening
if (state)
{
if (net_acceptsocket != -1)
return;
if ((net_acceptsocket = IPX_OpenSocket (net_hostport)) == -1)
Sys_Error ("IPX_Listen: Unable to open accept socket\n");
return;
}
// disable listening
if (net_acceptsocket == -1)
return;
IPX_CloseSocket (net_acceptsocket);
net_acceptsocket = -1;
}
//=============================================================================
int IPX_OpenSocket(int port)
{
int handle;
int n;
unsigned short socket;
if (handlesInUse == IPXSOCKETS)
return -1;
// open the IPX socket
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_OPEN;
regs.h.al = 0;
regs.x.dx = htons(port);
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
if (regs.h.al == 0xfe)
{
Con_DPrintf("IPX_OpenSocket: all sockets in use\n");
return -1;
}
if (regs.h.al == 0xff)
{
Con_DPrintf("IPX_OpenSocket: socket already open\n");
return -1;
}
if (regs.h.al != 0)
{
Con_DPrintf("IPX_OpenSocket: error %02x\n", regs.h.al);
return -1;
}
socket = regs.x.dx;
// grab a handle; fill in the ECBs, and get them listening
for (handle = 0; handle < IPXSOCKETS; handle++)
{
if (ipxsocket[handle] == 0)
{
ipxsocket[handle] = socket;
readlist[handle] = NULL;
sequence[handle] = 0;
for (n = 0; n < IPXSOCKBUFFERS; n ++)
{
lma->socketbuffer[handle][n].ecb.socket = socket;
lma->socketbuffer[handle][n].ecb.inUse = 0;
if (n)
IPX_ListenForPacket(&lma->socketbuffer[handle][n].ecb);
}
handlesInUse++;
return handle;
}
}
// "this will NEVER happen"
Sys_Error("IPX_OpenSocket: handle allocation failed\n");
return -1;
}
//=============================================================================
int IPX_CloseSocket(int handle)
{
// if there's a send in progress, give it one last chance
if (lma->socketbuffer[handle][0].ecb.inUse != 0)
IPX_RelinquishControl();
// close the socket (all pending sends/received are cancelled)
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_CLOSE;
regs.x.dx = ipxsocket[handle];
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
ipxsocket[handle] = 0;
handlesInUse--;
return 0;
}
//=============================================================================
int IPX_Connect (int handle, struct qsockaddr *addr)
{
IPXaddr ipxaddr;
Q_memcpy(&ipxaddr, &((struct sockaddr_ipx *)addr)->sipx_addr, sizeof(IPXaddr));
if (IPX_GetLocalTarget(&ipxaddr, lma->socketbuffer[handle][0].ecb.immediateAddress) != 0)
{
Con_Printf("Get Local Target failed\n");
return -1;
}
return 0;
}
//=============================================================================
int IPX_CheckNewConnections (void)
{
int n;
if (net_acceptsocket == -1)
return -1;
for (n = 1; n < IPXSOCKBUFFERS; n ++)
if (lma->socketbuffer[net_acceptsocket][n].ecb.inUse == 0)
return net_acceptsocket;
return -1;
}
//=============================================================================
int IPX_Read (int handle, byte *buf, int len, struct qsockaddr *addr)
{
ECB *ecb;
ipx_lowmem_buffer_t *rcvbuf;
int copylen;
ProcessReadyList(handle);
tryagain:
if (readlist[handle] == NULL)
return 0;
ecb = readlist[handle];
readlist[handle] = ecb->link;
if (ecb->completionCode != 0)
{
Con_Printf("Warning: IPX_Read error %02x\n", ecb->completionCode);
ecb->fragSize = sizeof(IPXheader) + sizeof(int) + NET_DATAGRAMSIZE;
IPX_ListenForPacket(ecb);
goto tryagain;
}
rcvbuf = (ipx_lowmem_buffer_t *)ecb;
// copy the data up to the buffer
copylen = ntohs(rcvbuf->header.length) - (sizeof(int) + sizeof(IPXheader));
if (len < copylen)
Sys_Error("IPX_Read: buffer too small (%d vs %d)\n", len, copylen);
Q_memcpy(buf, rcvbuf->data, copylen);
// fill in the addr if they want it
if (addr)
{
((struct sockaddr_ipx *)addr)->sipx_family = AF_NETWARE;
Q_memcpy(&((struct sockaddr_ipx *)addr)->sipx_addr, rcvbuf->header.source.network, sizeof(IPXaddr));
((struct sockaddr_ipx *)addr)->sipx_zero[0] = 0;
((struct sockaddr_ipx *)addr)->sipx_zero[1] = 0;
}
// update the send ecb's immediate address
Q_memcpy(lma->socketbuffer[handle][0].ecb.immediateAddress, rcvbuf->ecb.immediateAddress, 6);
// get this ecb listening again
rcvbuf->ecb.fragSize = sizeof(IPXheader) + sizeof(int) + NET_DATAGRAMSIZE;
IPX_ListenForPacket(&rcvbuf->ecb);
return copylen;
}
//=============================================================================
int IPX_Broadcast (int handle, byte *buf, int len)
{
struct sockaddr_ipx addr;
int ret;
Q_memset(addr.sipx_addr.network, 0x00, 4);
Q_memset(addr.sipx_addr.node, 0xff, 6);
addr.sipx_port = htons(net_hostport);
Q_memset(lma->socketbuffer[handle][0].ecb.immediateAddress, 0xff, 6);
ret = IPX_Write (handle, buf, len, (struct qsockaddr *)&addr);
return ret;
}
//=============================================================================
int IPX_Write (int handle, byte *buf, int len, struct qsockaddr *addr)
{
// has the previous send completed?
while (lma->socketbuffer[handle][0].ecb.inUse != 0)
IPX_RelinquishControl();
switch (lma->socketbuffer[handle][0].ecb.completionCode)
{
case 0x00: // success
case 0xfc: // request cancelled
break;
case 0xfd: // malformed packet
default:
Con_Printf("IPX driver send failure: %02x\n", lma->socketbuffer[handle][0].ecb.completionCode);
break;
case 0xfe: // packet undeliverable
case 0xff: // unable to send packet
Con_Printf("IPX lost route, trying to re-establish\n");
// look for a new route
if (IPX_GetLocalTarget (&lma->socketbuffer[handle][0].header.destination, lma->socketbuffer[handle][0].ecb.immediateAddress) != 0)
return -1;
// re-send the one that failed
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_SEND;
regs.x.es = ptr2real(&lma->socketbuffer[handle][0].ecb) >> 4;
regs.x.si = ptr2real(&lma->socketbuffer[handle][0].ecb) & 0xf;
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
// report that we did not send the current one
return 0;
}
// ecb : length
lma->socketbuffer[handle][0].ecb.fragSize = sizeof(IPXheader) + sizeof(int) + len;
// ipx header : type
lma->socketbuffer[handle][0].header.type = PTYPE_IPX;
// ipx header : destination
Q_memcpy(&lma->socketbuffer[handle][0].header.destination, &((struct sockaddr_ipx *)addr)->sipx_addr, sizeof(IPXaddr));
// sequence number
lma->socketbuffer[handle][0].sequence = sequence[handle];
sequence[handle]++;
// copy down the data
Q_memcpy(lma->socketbuffer[handle][0].data, buf, len);
regs.x.cs = ipx_cs;
regs.x.ip = ipx_ip;
regs.x.bx = IPX_SEND;
regs.x.es = ptr2real(&lma->socketbuffer[handle][0].ecb) >> 4;
regs.x.si = ptr2real(&lma->socketbuffer[handle][0].ecb) & 0xf;
__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
return len;
}
//=============================================================================
char *IPX_AddrToString (struct qsockaddr *addr)
{
static char buf[28];
sprintf(buf, "%02x%02x%02x%02x:%02x%02x%02x%02x%02x%02x:%u",
((struct sockaddr_ipx *)addr)->sipx_addr.network[0],
((struct sockaddr_ipx *)addr)->sipx_addr.network[1],
((struct sockaddr_ipx *)addr)->sipx_addr.network[2],
((struct sockaddr_ipx *)addr)->sipx_addr.network[3],
((struct sockaddr_ipx *)addr)->sipx_addr.node[0],
((struct sockaddr_ipx *)addr)->sipx_addr.node[1],
((struct sockaddr_ipx *)addr)->sipx_addr.node[2],
((struct sockaddr_ipx *)addr)->sipx_addr.node[3],
((struct sockaddr_ipx *)addr)->sipx_addr.node[4],
((struct sockaddr_ipx *)addr)->sipx_addr.node[5],
ntohs(((struct sockaddr_ipx *)addr)->sipx_port)
);
return buf;
}
//=============================================================================
int IPX_StringToAddr (char *string, struct qsockaddr *addr)
{
int val;
char buf[3];
buf[2] = 0;
Q_memset(addr, 0, sizeof(struct qsockaddr));
addr->sa_family = AF_NETWARE;
#define DO(src,dest) \
buf[0] = string[src]; \
buf[1] = string[src + 1]; \
if (sscanf (buf, "%x", &val) != 1) \
return -1; \
((struct sockaddr_ipx *)addr)->sipx_addr.dest = val
DO(0, network[0]);
DO(2, network[1]);
DO(4, network[2]);
DO(6, network[3]);
DO(9, node[0]);
DO(11, node[1]);
DO(13, node[2]);
DO(15, node[3]);
DO(17, node[4]);
DO(19, node[5]);
#undef DO
sscanf (&string[22], "%u", &val);
((struct sockaddr_ipx *)addr)->sipx_port = htons(val);
return 0;
}
//=============================================================================
int IPX_GetSocketAddr (int handle, struct qsockaddr *addr)
{
Q_memset(addr, 0, sizeof(struct qsockaddr));
addr->sa_family = AF_NETWARE;
IPX_GetLocalAddress(&((struct sockaddr_ipx *)addr)->sipx_addr);
((struct sockaddr_ipx *)addr)->sipx_port = ipxsocket[handle];
return 0;
}
//=============================================================================
int IPX_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
Q_strcpy(name, IPX_AddrToString(addr));
return 0;
}
//=============================================================================
int IPX_GetAddrFromName (char *name, struct qsockaddr *addr)
{
int n;
char buf[32];
n = Q_strlen(name);
if (n == 12)
{
sprintf(buf, "00000000:%s:%u", name, net_hostport);
return IPX_StringToAddr (buf, addr);
}
if (n == 21)
{
sprintf(buf, "%s:%u", name, net_hostport);
return IPX_StringToAddr (buf, addr);
}
if (n > 21 && n <= 27)
return IPX_StringToAddr (name, addr);
return -1;
}
//=============================================================================
int IPX_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
{
if (addr1->sa_family != addr2->sa_family)
return -1;
if(Q_memcmp(&((struct sockaddr_ipx *)addr1)->sipx_addr, &((struct sockaddr_ipx *)addr2)->sipx_addr, 10))
return -1;
if (((struct sockaddr_ipx *)addr1)->sipx_port != ((struct sockaddr_ipx *)addr2)->sipx_port)
return 1;
return 0;
}
//=============================================================================
int IPX_GetSocketPort (struct qsockaddr *addr)
{
return ntohs(((struct sockaddr_ipx *)addr)->sipx_port);
}
int IPX_SetSocketPort (struct qsockaddr *addr, int port)
{
((struct sockaddr_ipx *)addr)->sipx_port = htons(port);
return 0;
}
//=============================================================================