706 lines
18 KiB
C
706 lines
18 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// net_ipx.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <dpmi.h>
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#include "quakedef.h"
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#include "dosisms.h"
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#include "net_ipx.h"
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#define EIO 5 /* I/O error */
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#define AF_NETWARE 64
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#define IPX_OPEN 0
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#define IPX_CLOSE 1
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#define IPX_GETROUTE 2
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#define IPX_SEND 3
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#define IPX_LISTEN 4
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#define IPX_SCHEDULEEVENT 5
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#define IPX_CANCEL 6
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#define IPX_SCHEDULESPECIALEVENT 7
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#define IPX_GETINTERVALMARKER 8
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#define IPX_GETADDRESS 9
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#define IPX_RELINQUISH 10
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#define PTYPE_UNKNOWN 0
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#define PTYPE_RIP 1
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#define PTYPE_ECHO 2
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#define PTYPE_ERROR 3
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#define PTYPE_IPX 4
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#define PTYPE_SPX 5
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#pragma pack(1)
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typedef struct
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{
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byte network[4];
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byte node[6];
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short socket;
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} IPXaddr;
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struct sockaddr_ipx
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{
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short sipx_family;
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IPXaddr sipx_addr;
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char sipx_zero[2];
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};
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#define sipx_port sipx_addr.socket
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typedef struct
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{
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short checkSum;
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short length;
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byte transportControl;
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byte type;
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IPXaddr destination;
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IPXaddr source;
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} IPXheader;
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typedef struct ECBStructure
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{
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struct ECBStructure *link;
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unsigned short ESR_off;
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unsigned short ESR_seg;
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byte inUse;
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byte completionCode;
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short socket;
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byte IPXWorkspace[4];
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byte driverWorkspace[12];
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byte immediateAddress[6];
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short fragCount;
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short fragOff;
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short fragSeg;
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short fragSize;
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} ECB;
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#pragma pack()
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typedef struct
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{
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ECB ecb;
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IPXheader header;
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int sequence;
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char data[NET_DATAGRAMSIZE];
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} ipx_lowmem_buffer_t;
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#define LOWMEMSIZE (100 * 1024)
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#define LOWMEMSAVE 256
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#define IPXBUFFERS ((LOWMEMSIZE - LOWMEMSAVE)/ sizeof(ipx_lowmem_buffer_t))
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#define IPXSOCKBUFFERS 5
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#define IPXSOCKETS (IPXBUFFERS / IPXSOCKBUFFERS)
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// each socket's socketbuffer 0 is used for sending, the others for listening
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typedef struct
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{
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char reserved[LOWMEMSAVE];
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ipx_lowmem_buffer_t socketbuffer[IPXSOCKETS][IPXSOCKBUFFERS];
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} ipx_lowmem_area_t;
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static int ipxsocket[IPXSOCKETS];
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static ECB *readlist[IPXSOCKETS];
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static int sequence[IPXSOCKETS];
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static int handlesInUse;
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static ipx_lowmem_area_t *lma;
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static char *lowmem_buffer;
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static int lowmem_bufseg;
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static int lowmem_bufoff;
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static unsigned short ipx_cs;
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static unsigned short ipx_ip;
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static int net_acceptsocket = -1;
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static int net_controlsocket;
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static void IPX_PollProcedure(void);
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static PollProcedure pollProcedure = {NULL, 0.0, IPX_PollProcedure};
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//=============================================================================
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static void IPX_GetLocalAddress(IPXaddr *addr)
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{
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regs.x.cs = ipx_cs;
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regs.x.ip = ipx_ip;
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regs.x.bx = IPX_GETADDRESS;
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regs.x.es = lowmem_bufseg;
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regs.x.si = lowmem_bufoff;
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__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
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Q_memcpy(addr, lowmem_buffer, 10);
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}
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//=============================================================================
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static int IPX_GetLocalTarget(IPXaddr *addr, byte *localTarget)
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{
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regs.x.cs = ipx_cs;
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regs.x.ip = ipx_ip;
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regs.x.bx = IPX_GETROUTE;
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regs.x.es = lowmem_bufseg;
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regs.x.si = lowmem_bufoff;
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regs.x.di = lowmem_bufoff + sizeof(IPXaddr);
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Q_memcpy(lowmem_buffer, addr, sizeof(IPXaddr));
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__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
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if (regs.h.al)
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return -1;
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Q_memcpy(localTarget, lowmem_buffer + sizeof(IPXaddr), 6);
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return 0;
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}
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//=============================================================================
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static void IPX_ListenForPacket(ECB *ecb)
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{
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regs.x.cs = ipx_cs;
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regs.x.ip = ipx_ip;
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regs.x.bx = IPX_LISTEN;
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regs.x.es = ptr2real(ecb) >> 4;
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regs.x.si = ptr2real(ecb) & 0xf;
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__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
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}
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//=============================================================================
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static void IPX_RelinquishControl(void)
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{
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regs.x.cs = ipx_cs;
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regs.x.ip = ipx_ip;
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regs.x.bx = IPX_RELINQUISH;
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__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
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}
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void IPX_PollProcedure(void)
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{
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IPX_RelinquishControl();
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SchedulePollProcedure(&pollProcedure, 0.01);
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}
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//=============================================================================
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static void ProcessReadyList(int s)
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{
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int n;
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ECB *ecb;
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ECB *prev;
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for (n = 1; n < IPXSOCKBUFFERS; n++)
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{
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if (lma->socketbuffer[s][n].ecb.inUse == 0)
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{
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for (ecb = readlist[s], prev = NULL; ecb; ecb = ecb->link)
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{
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if (lma->socketbuffer[s][n].sequence < ((ipx_lowmem_buffer_t *) ecb)->sequence)
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break;
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prev = ecb;
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}
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if (ecb)
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lma->socketbuffer[s][n].ecb.link = ecb;
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else
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lma->socketbuffer[s][n].ecb.link = NULL;
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if (prev)
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prev->link = &lma->socketbuffer[s][n].ecb;
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else
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readlist[s] = &lma->socketbuffer[s][n].ecb;
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lma->socketbuffer[s][n].ecb.inUse = 0xff;
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}
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}
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}
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//=============================================================================
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int IPX_Init(void)
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{
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int s;
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int n;
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struct qsockaddr addr;
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char *colon;
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if (COM_CheckParm ("-noipx"))
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return -1;
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// find the IPX far call entry point
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regs.x.ax = 0x7a00;
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__dpmi_simulate_real_mode_interrupt (0x2f, (__dpmi_regs *)®s);
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if (regs.h.al != 0xff)
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{
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Con_Printf("IPX not detected\n");
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return -1;
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}
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ipx_cs = regs.x.es;
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ipx_ip = regs.x.di;
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// grab a chunk of memory down in DOS land
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lowmem_buffer = dos_getmemory(LOWMEMSIZE);
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if (!lowmem_buffer)
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{
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Con_Printf("IPX_Init: Not enough low memory\n");
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return -1;
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}
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lowmem_bufoff = ptr2real(lowmem_buffer) & 0xf;
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lowmem_bufseg = ptr2real(lowmem_buffer) >> 4;
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// init socket handles & buffers
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handlesInUse = 0;
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lma = (ipx_lowmem_area_t *)lowmem_buffer;
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for (s = 0; s < IPXSOCKETS; s++)
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{
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ipxsocket[s] = 0;
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for (n = 0; n < IPXSOCKBUFFERS; n++)
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{
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lma->socketbuffer[s][n].ecb.link = NULL;
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lma->socketbuffer[s][n].ecb.ESR_off = 0;
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lma->socketbuffer[s][n].ecb.ESR_seg = 0;
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lma->socketbuffer[s][n].ecb.socket = 0;
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lma->socketbuffer[s][n].ecb.inUse = 0xff;
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lma->socketbuffer[s][n].ecb.completionCode = 0;
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lma->socketbuffer[s][n].ecb.fragCount = 1;
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lma->socketbuffer[s][n].ecb.fragOff = ptr2real(&lma->socketbuffer[s][n].header) & 0xf;
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lma->socketbuffer[s][n].ecb.fragSeg = ptr2real(&lma->socketbuffer[s][n].header) >> 4;
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lma->socketbuffer[s][n].ecb.fragSize = sizeof(IPXheader) + sizeof(int) + NET_DATAGRAMSIZE;
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}
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}
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if ((net_controlsocket = IPX_OpenSocket (0)) == -1)
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{
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dos_freememory(lowmem_buffer);
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Con_DPrintf ("IPX_Init: Unable to open control socket\n");
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return -1;
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}
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SchedulePollProcedure(&pollProcedure, 0.01);
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IPX_GetSocketAddr (net_controlsocket, &addr);
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Q_strcpy(my_ipx_address, IPX_AddrToString (&addr));
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colon = Q_strrchr (my_ipx_address, ':');
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if (colon)
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*colon = 0;
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Con_Printf("IPX initialized\n");
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ipxAvailable = true;
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return net_controlsocket;
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}
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//=============================================================================
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void IPX_Shutdown(void)
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{
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IPX_Listen (false);
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IPX_CloseSocket (net_controlsocket);
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dos_freememory(lowmem_buffer);
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}
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//=============================================================================
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void IPX_Listen (qboolean state)
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{
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// enable listening
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if (state)
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{
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if (net_acceptsocket != -1)
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return;
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if ((net_acceptsocket = IPX_OpenSocket (net_hostport)) == -1)
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Sys_Error ("IPX_Listen: Unable to open accept socket\n");
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return;
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}
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// disable listening
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if (net_acceptsocket == -1)
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return;
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IPX_CloseSocket (net_acceptsocket);
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net_acceptsocket = -1;
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}
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//=============================================================================
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int IPX_OpenSocket(int port)
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{
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int handle;
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int n;
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unsigned short socket;
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if (handlesInUse == IPXSOCKETS)
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return -1;
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// open the IPX socket
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regs.x.cs = ipx_cs;
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regs.x.ip = ipx_ip;
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regs.x.bx = IPX_OPEN;
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regs.h.al = 0;
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regs.x.dx = htons(port);
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__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
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if (regs.h.al == 0xfe)
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{
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Con_DPrintf("IPX_OpenSocket: all sockets in use\n");
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return -1;
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}
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if (regs.h.al == 0xff)
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{
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Con_DPrintf("IPX_OpenSocket: socket already open\n");
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return -1;
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}
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if (regs.h.al != 0)
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{
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Con_DPrintf("IPX_OpenSocket: error %02x\n", regs.h.al);
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return -1;
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}
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socket = regs.x.dx;
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// grab a handle; fill in the ECBs, and get them listening
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for (handle = 0; handle < IPXSOCKETS; handle++)
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{
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if (ipxsocket[handle] == 0)
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{
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ipxsocket[handle] = socket;
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readlist[handle] = NULL;
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sequence[handle] = 0;
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for (n = 0; n < IPXSOCKBUFFERS; n ++)
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{
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lma->socketbuffer[handle][n].ecb.socket = socket;
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lma->socketbuffer[handle][n].ecb.inUse = 0;
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if (n)
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IPX_ListenForPacket(&lma->socketbuffer[handle][n].ecb);
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}
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handlesInUse++;
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return handle;
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}
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}
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// "this will NEVER happen"
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Sys_Error("IPX_OpenSocket: handle allocation failed\n");
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return -1;
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}
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//=============================================================================
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int IPX_CloseSocket(int handle)
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{
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// if there's a send in progress, give it one last chance
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if (lma->socketbuffer[handle][0].ecb.inUse != 0)
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IPX_RelinquishControl();
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// close the socket (all pending sends/received are cancelled)
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regs.x.cs = ipx_cs;
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regs.x.ip = ipx_ip;
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regs.x.bx = IPX_CLOSE;
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regs.x.dx = ipxsocket[handle];
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__dpmi_simulate_real_mode_procedure_retf((__dpmi_regs *)®s);
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ipxsocket[handle] = 0;
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handlesInUse--;
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return 0;
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}
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//=============================================================================
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int IPX_Connect (int handle, struct qsockaddr *addr)
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{
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IPXaddr ipxaddr;
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Q_memcpy(&ipxaddr, &((struct sockaddr_ipx *)addr)->sipx_addr, sizeof(IPXaddr));
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if (IPX_GetLocalTarget(&ipxaddr, lma->socketbuffer[handle][0].ecb.immediateAddress) != 0)
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{
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Con_Printf("Get Local Target failed\n");
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return -1;
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}
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return 0;
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}
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//=============================================================================
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int IPX_CheckNewConnections (void)
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{
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int n;
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if (net_acceptsocket == -1)
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return -1;
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for (n = 1; n < IPXSOCKBUFFERS; n ++)
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if (lma->socketbuffer[net_acceptsocket][n].ecb.inUse == 0)
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return net_acceptsocket;
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return -1;
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}
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//=============================================================================
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int IPX_Read (int handle, byte *buf, int len, struct qsockaddr *addr)
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{
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ECB *ecb;
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ipx_lowmem_buffer_t *rcvbuf;
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int copylen;
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ProcessReadyList(handle);
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tryagain:
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if (readlist[handle] == NULL)
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return 0;
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ecb = readlist[handle];
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readlist[handle] = ecb->link;
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if (ecb->completionCode != 0)
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{
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Con_Printf("Warning: IPX_Read error %02x\n", ecb->completionCode);
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ecb->fragSize = sizeof(IPXheader) + sizeof(int) + NET_DATAGRAMSIZE;
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IPX_ListenForPacket(ecb);
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goto tryagain;
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}
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rcvbuf = (ipx_lowmem_buffer_t *)ecb;
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// copy the data up to the buffer
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copylen = ntohs(rcvbuf->header.length) - (sizeof(int) + sizeof(IPXheader));
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if (len < copylen)
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Sys_Error("IPX_Read: buffer too small (%d vs %d)\n", len, copylen);
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Q_memcpy(buf, rcvbuf->data, copylen);
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// fill in the addr if they want it
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if (addr)
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{
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((struct sockaddr_ipx *)addr)->sipx_family = AF_NETWARE;
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Q_memcpy(&((struct sockaddr_ipx *)addr)->sipx_addr, rcvbuf->header.source.network, sizeof(IPXaddr));
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((struct sockaddr_ipx *)addr)->sipx_zero[0] = 0;
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((struct sockaddr_ipx *)addr)->sipx_zero[1] = 0;
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}
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// update the send ecb's immediate address
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Q_memcpy(lma->socketbuffer[handle][0].ecb.immediateAddress, rcvbuf->ecb.immediateAddress, 6);
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// get this ecb listening again
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rcvbuf->ecb.fragSize = sizeof(IPXheader) + sizeof(int) + NET_DATAGRAMSIZE;
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IPX_ListenForPacket(&rcvbuf->ecb);
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return copylen;
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}
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//=============================================================================
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int IPX_Broadcast (int handle, byte *buf, int len)
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{
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struct sockaddr_ipx addr;
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int ret;
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Q_memset(addr.sipx_addr.network, 0x00, 4);
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Q_memset(addr.sipx_addr.node, 0xff, 6);
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addr.sipx_port = htons(net_hostport);
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Q_memset(lma->socketbuffer[handle][0].ecb.immediateAddress, 0xff, 6);
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ret = IPX_Write (handle, buf, len, (struct qsockaddr *)&addr);
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return ret;
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}
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//=============================================================================
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int IPX_Write (int handle, byte *buf, int len, struct qsockaddr *addr)
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{
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// has the previous send completed?
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while (lma->socketbuffer[handle][0].ecb.inUse != 0)
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IPX_RelinquishControl();
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switch (lma->socketbuffer[handle][0].ecb.completionCode)
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{
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case 0x00: // success
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case 0xfc: // request cancelled
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break;
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case 0xfd: // malformed packet
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default:
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Con_Printf("IPX driver send failure: %02x\n", lma->socketbuffer[handle][0].ecb.completionCode);
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break;
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case 0xfe: // packet undeliverable
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case 0xff: // unable to send packet
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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;
|
|
}
|
|
|
|
//=============================================================================
|