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dosbox-wii/src/hardware/ipx.cpp

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DOSBox for Windows, as of 3 May 2009, from the DOSBox CVS on SourceForge. Version 0.72 + many CVS changes, probably close to 0.73 release.
2009-05-03 01:02:35 +02:00
/*
* Copyright (C) 2002-2007 The DOSBox Team
*
* 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.
*/
/* $Id: ipx.cpp,v 1.15 2008/07/26 14:49:38 qbix79 Exp $ */
#include "dosbox.h"
#if C_IPX
#include <string.h>
#include <time.h>
#include <stdio.h>
#include "cross.h"
#include "support.h"
#include "cpu.h"
#include "regs.h"
#include "inout.h"
#include "setup.h"
#include "debug.h"
#include "callback.h"
#include "dos_system.h"
#include "mem.h"
#include "ipx.h"
#include "ipxserver.h"
#include "timer.h"
#include "SDL_net.h"
#include "programs.h"
#include "pic.h"
#define SOCKTABLESIZE 150 // DOS IPX driver was limited to 150 open sockets
struct ipxnetaddr {
Uint8 netnum[4]; // Both are big endian
Uint8 netnode[6];
} localIpxAddr;
Bit32u udpPort;
bool isIpxServer;
bool isIpxConnected;
IPaddress ipxServConnIp; // IPAddress for client connection to server
UDPsocket ipxClientSocket;
int UDPChannel; // Channel used by UDP connection
Bit8u recvBuffer[IPXBUFFERSIZE]; // Incoming packet buffer
static RealPt ipx_callback;
SDLNet_SocketSet clientSocketSet;
packetBuffer incomingPacket;
static Bit16u socketCount;
static Bit16u opensockets[SOCKTABLESIZE];
static Bit16u swapByte(Bit16u sockNum) {
return (((sockNum>> 8)) | (sockNum << 8));
}
void UnpackIP(PackedIP ipPack, IPaddress * ipAddr) {
ipAddr->host = ipPack.host;
ipAddr->port = ipPack.port;
}
void PackIP(IPaddress ipAddr, PackedIP *ipPack) {
ipPack->host = ipAddr.host;
ipPack->port = ipAddr.port;
}
ECBClass *ECBList; // Linked list of ECB's
ECBClass* ESRList; // ECBs waiting to be ESR notified
#ifdef IPX_DEBUGMSG
Bitu ECBSerialNumber = 0;
Bitu ECBAmount = 0;
#endif
ECBClass::ECBClass(Bit16u segment, Bit16u offset) {
ECBAddr = RealMake(segment, offset);
databuffer = 0;
#ifdef IPX_DEBUGMSG
SerialNumber = ECBSerialNumber;
ECBSerialNumber++;
ECBAmount++;
LOG_IPX("ECB: SN%7d created. Number of ECBs: %3d, ESR %4x:%4x, ECB %4x:%4x",
SerialNumber,ECBAmount,
real_readw(RealSeg(ECBAddr),
RealOff(ECBAddr)+6),
real_readw(RealSeg(ECBAddr),
RealOff(ECBAddr)+4),segment,offset);
#endif
isInESRList = false;
prevECB = NULL;
nextECB = NULL;
if (ECBList == NULL)
ECBList = this;
else {
// Transverse the list until we hit the end
ECBClass *useECB = ECBList;
while(useECB->nextECB != NULL)
useECB = useECB->nextECB;
useECB->nextECB = this;
this->prevECB = useECB;
}
iuflag = getInUseFlag();
mysocket = getSocket();
}
void ECBClass::writeDataBuffer(Bit8u* buffer, Bit16u length) {
if(databuffer!=0) delete [] databuffer;
databuffer = new Bit8u[length];
memcpy(databuffer,buffer,length);
buflen=length;
}
bool ECBClass::writeData() {
Bitu length=buflen;
Bit8u* buffer = databuffer;
fragmentDescriptor tmpFrag;
setInUseFlag(USEFLAG_AVAILABLE);
Bitu fragCount = getFragCount();
Bitu bufoffset = 0;
for(Bitu i = 0;i < fragCount;i++) {
getFragDesc(i,&tmpFrag);
for(Bitu t = 0;t < tmpFrag.size;t++) {
real_writeb(tmpFrag.segment, tmpFrag.offset + t, buffer[bufoffset]);
bufoffset++;
if(bufoffset >= length) {
setCompletionFlag(COMP_SUCCESS);
setImmAddress(&buffer[22]); // Write in source node
return true;
}
}
}
if(bufoffset < length) {
setCompletionFlag(COMP_MALFORMED);
return false;
}
return false;
}
Bit16u ECBClass::getSocket(void) {
return swapByte(real_readw(RealSeg(ECBAddr), RealOff(ECBAddr) + 0xa));
}
Bit8u ECBClass::getInUseFlag(void) {
return real_readb(RealSeg(ECBAddr), RealOff(ECBAddr) + 0x8);
}
void ECBClass::setInUseFlag(Bit8u flagval) {
iuflag = flagval;
real_writeb(RealSeg(ECBAddr), RealOff(ECBAddr) + 0x8, flagval);
}
void ECBClass::setCompletionFlag(Bit8u flagval) {
real_writeb(RealSeg(ECBAddr), RealOff(ECBAddr) + 0x9, flagval);
}
Bit16u ECBClass::getFragCount(void) {
return real_readw(RealSeg(ECBAddr), RealOff(ECBAddr) + 34);
}
void ECBClass::getFragDesc(Bit16u descNum, fragmentDescriptor *fragDesc) {
Bit16u memoff = RealOff(ECBAddr) + 30 + ((descNum+1) * 6);
fragDesc->offset = real_readw(RealSeg(ECBAddr), memoff);
memoff += 2;
fragDesc->segment = real_readw(RealSeg(ECBAddr), memoff);
memoff += 2;
fragDesc->size = real_readw(RealSeg(ECBAddr), memoff);
}
RealPt ECBClass::getESRAddr(void) {
return RealMake(real_readw(RealSeg(ECBAddr),
RealOff(ECBAddr)+6),
real_readw(RealSeg(ECBAddr),
RealOff(ECBAddr)+4));
}
void ECBClass::NotifyESR(void) {
Bit32u ESRval = real_readd(RealSeg(ECBAddr), RealOff(ECBAddr)+4);
if(ESRval || databuffer) { // databuffer: write data at realmode/v86 time
// LOG_IPX("ECB: SN%7d to be notified.", SerialNumber);
// take the ECB out of the current list
if(prevECB == NULL) { // was the first in the list
ECBList = nextECB;
if(ECBList != NULL) ECBList->prevECB = NULL;
} else { // not the first
prevECB->nextECB = nextECB;
if(nextECB != NULL) nextECB->prevECB = prevECB;
}
nextECB = NULL;
// put it to the notification queue
if(ESRList==NULL) {
ESRList = this;
prevECB = NULL;
} else {// put to end of ESR list
ECBClass* useECB = ESRList;
while(useECB->nextECB != NULL)
useECB = useECB->nextECB;
useECB->nextECB = this;
prevECB = useECB;
}
isInESRList = true;
PIC_ActivateIRQ(11);
}
// this one does not want to be notified, delete it right away
else delete this;
}
void ECBClass::setImmAddress(Bit8u *immAddr) {
for(Bitu i=0;i<6;i++)
real_writeb(RealSeg(ECBAddr), RealOff(ECBAddr)+28+i, immAddr[i]);
}
void ECBClass::getImmAddress(Bit8u* immAddr) {
for(Bitu i=0;i<6;i++)
immAddr[i] = real_readb(RealSeg(ECBAddr), RealOff(ECBAddr)+28+i);
}
ECBClass::~ECBClass() {
#ifdef IPX_DEBUGMSG
ECBAmount--;
LOG_IPX("ECB: SN%7d destroyed. Remaining ECBs: %3d", SerialNumber,ECBAmount);
#endif
if(isInESRList) {
// in ESR list, always the first element is deleted.
ESRList=nextECB;
} else {
if(prevECB == NULL) { // was the first in the list
ECBList = nextECB;
if(ECBList != NULL) ECBList->prevECB = NULL;
} else { // not the first
prevECB->nextECB = nextECB;
if(nextECB != NULL) nextECB->prevECB = prevECB;
}
}
if(databuffer!=0) delete [] databuffer;
}
static bool sockInUse(Bit16u sockNum) {
for(Bitu i=0;i<socketCount;i++) {
if (opensockets[i] == sockNum) return true;
}
return false;
}
static void OpenSocket(void) {
Bit16u sockNum, sockAlloc;
sockNum = swapByte(reg_dx);
if(socketCount >= SOCKTABLESIZE) {
reg_al = 0xfe; // Socket table full
return;
}
if(sockNum == 0x0000) {
// Dynamic socket allocation
sockAlloc = 0x4002;
while(sockInUse(sockAlloc) && (sockAlloc < 0x7fff)) sockAlloc++;
if(sockAlloc > 0x7fff) {
// I have no idea how this could happen if the IPX driver
// is limited to 150 open sockets at a time
LOG_MSG("IPX: Out of dynamic sockets");
}
sockNum = sockAlloc;
} else {
if(sockInUse(sockNum)) {
reg_al = 0xff; // Socket already open
return;
}
}
opensockets[socketCount] = sockNum;
socketCount++;
reg_al = 0x00; // Success
reg_dx = swapByte(sockNum); // Convert back to big-endian
}
static void CloseSocket(void) {
Bit16u sockNum, i;
ECBClass* tmpECB = ECBList;
ECBClass* tmp2ECB = ECBList;
sockNum = swapByte(reg_dx);
if(!sockInUse(sockNum)) return;
for(i=0;i<socketCount-1;i++) {
if (opensockets[i] == sockNum) {
// Realign list of open sockets
memcpy(&opensockets[i], &opensockets[i+1], SOCKTABLESIZE - (i + 1));
break;
}
}
--socketCount;
// delete all ECBs of that socket
while(tmpECB!=0) {
tmp2ECB = tmpECB->nextECB;
if(tmpECB->getSocket()==sockNum) {
tmpECB->setCompletionFlag(COMP_CANCELLED);
tmpECB->setInUseFlag(USEFLAG_AVAILABLE);
delete tmpECB;
}
tmpECB = tmp2ECB;
}
}
//static RealPt IPXVERpointer;
static bool IPX_Multiplex(void) {
if(reg_ax != 0x7a00) return false;
reg_al = 0xff;
SegSet16(es,RealSeg(ipx_callback));
reg_di = RealOff(ipx_callback);
//reg_bx = RealOff(IPXVERpointer);
//reg_cx = RealSeg(ipx_callback);
return true;
}
static void IPX_AES_EventHandler(Bitu param)
{
ECBClass* tmpECB = ECBList;
ECBClass* tmp2ECB;
while(tmpECB!=0) {
tmp2ECB = tmpECB->nextECB;
if(tmpECB->iuflag==USEFLAG_AESCOUNT && param==(Bitu)tmpECB->ECBAddr) {
tmpECB->setCompletionFlag(COMP_SUCCESS);
tmpECB->setInUseFlag(USEFLAG_AVAILABLE);
tmpECB->NotifyESR();
// LOG_IPX("AES Notification: ECB S/N %d",tmpECB->SerialNumber);
return;
}
tmpECB = tmp2ECB;
}
LOG_MSG("!!!! Rouge AES !!!!" );
}
static void sendPacket(ECBClass* sendecb);
static void handleIpxRequest(void) {
ECBClass *tmpECB;
switch (reg_bx) {
case 0x0000: // Open socket
OpenSocket();
LOG_IPX("IPX: Open socket %4x", swapByte(reg_dx));
break;
case 0x0001: // Close socket
LOG_IPX("IPX: Close socket %4x", swapByte(reg_dx));
CloseSocket();
break;
case 0x0002: // get local target
// es:si
// Currently no support for multiple networks
for(Bitu i = 0; i < 6; i++)
real_writeb(SegValue(es),reg_di+i,real_readb(SegValue(es),reg_si+i+4));
reg_cx=1; // time ticks expected
reg_al=0x00; //success
break;
case 0x0003: // Send packet
tmpECB = new ECBClass(SegValue(es),reg_si);
if(!incomingPacket.connected) {
tmpECB->setInUseFlag(USEFLAG_AVAILABLE);
tmpECB->setCompletionFlag(COMP_UNDELIVERABLE);
delete tmpECB; // not notify?
reg_al = 0xff; // Failure
} else {
tmpECB->setInUseFlag(USEFLAG_SENDING);
//LOG_IPX("IPX: Sending packet on %4x", tmpECB->getSocket());
reg_al = 0x00; // Success
sendPacket(tmpECB);
}
break;
case 0x0004: // Listen for packet
tmpECB = new ECBClass(SegValue(es),reg_si);
// LOG_IPX("ECB: SN%7d RECEIVE.", tmpECB->SerialNumber);
if(!sockInUse(tmpECB->getSocket())) { // Socket is not open
reg_al = 0xff;
tmpECB->setInUseFlag(USEFLAG_AVAILABLE);
tmpECB->setCompletionFlag(COMP_HARDWAREERROR);
delete tmpECB;
} else {
reg_al = 0x00; // Success
tmpECB->setInUseFlag(USEFLAG_LISTENING);
/*LOG_IPX("IPX: Listen for packet on 0x%4x - ESR address %4x:%4x",
tmpECB->getSocket(),
RealSeg(tmpECB->getESRAddr()),
RealOff(tmpECB->getESRAddr()));*/
}
break;
case 0x0005: // SCHEDULE IPX EVENT
case 0x0007: // SCHEDULE SPECIAL IPX EVENT
{
tmpECB = new ECBClass(SegValue(es),reg_si);
// LOG_IPX("ECB: SN%7d AES. T=%fms.", tmpECB->SerialNumber,
// (1000.0f/(1193182.0f/65536.0f))*(float)reg_ax);
PIC_AddEvent(IPX_AES_EventHandler,
(1000.0f/(1193182.0f/65536.0f))*(float)reg_ax,(Bitu)tmpECB->ECBAddr);
tmpECB->setInUseFlag(USEFLAG_AESCOUNT);
break;
}
case 0x0006: // cancel operation
{
RealPt ecbaddress = RealMake(SegValue(es),reg_si);
ECBClass* tmpECB= ECBList;
ECBClass* tmp2ECB;
while(tmpECB) {
tmp2ECB=tmpECB->nextECB;
if(tmpECB->ECBAddr == ecbaddress) {
if(tmpECB->getInUseFlag()==USEFLAG_AESCOUNT)
PIC_RemoveSpecificEvents(IPX_AES_EventHandler,(Bitu)ecbaddress);
tmpECB->setInUseFlag(USEFLAG_AVAILABLE);
tmpECB->setCompletionFlag(COMP_CANCELLED);
delete tmpECB;
reg_al=0; // Success
LOG_IPX("IPX: ECB canceled.");
return;
}
tmpECB=tmp2ECB;
}
reg_al=0xff; // Fail
break;
}
case 0x0008: // Get interval marker
reg_ax = mem_readw(0x46c); // BIOS_TIMER
break;
case 0x0009: // Get internetwork address
{
LOG_IPX("IPX: Get internetwork address %2x:%2x:%2x:%2x:%2x:%2x",
localIpxAddr.netnode[5], localIpxAddr.netnode[4],
localIpxAddr.netnode[3], localIpxAddr.netnode[2],
localIpxAddr.netnode[1], localIpxAddr.netnode[0]);
Bit8u * addrptr = (Bit8u *)&localIpxAddr;
for(Bit16u i=0;i<10;i++)
real_writeb(SegValue(es),reg_si+i,addrptr[i]);
break;
}
case 0x000a: // Relinquish control
break; // Idle thingy
case 0x000b: // Disconnect from Target
break; // We don't even connect
case 0x000d: // get packet size
reg_cx=0; // retry count
reg_ax=1024; // real implementation returns 1024
break;
case 0x0010: // SPX install check
reg_al=0; // SPX not installed
break;
case 0x001a: // get driver maximum packet size
reg_cx=0; // retry count
reg_ax=IPXBUFFERSIZE; // max packet size: something near the
// ethernet packet size
break;
default:
LOG_MSG("Unhandled IPX function: %4x", reg_bx);
break;
}
}
// Entrypoint handler
Bitu IPX_Handler(void) {
handleIpxRequest();
return CBRET_NONE;
}
// INT 7A handler
Bitu IPX_IntHandler(void) {
handleIpxRequest();
return CBRET_NONE;
}
static void pingAck(IPaddress retAddr) {
IPXHeader regHeader;
UDPpacket regPacket;
Bits result;
SDLNet_Write16(0xffff, regHeader.checkSum);
SDLNet_Write16(sizeof(regHeader), regHeader.length);
SDLNet_Write32(0, regHeader.dest.network);
PackIP(retAddr, &regHeader.dest.addr.byIP);
SDLNet_Write16(0x2, regHeader.dest.socket);
SDLNet_Write32(0, regHeader.src.network);
memcpy(regHeader.src.addr.byNode.node, localIpxAddr.netnode, sizeof(regHeader.src.addr.byNode.node));
SDLNet_Write16(0x2, regHeader.src.socket);
regHeader.transControl = 0;
regHeader.pType = 0x0;
regPacket.data = (Uint8 *)&regHeader;
regPacket.len = sizeof(regHeader);
regPacket.maxlen = sizeof(regHeader);
regPacket.channel = UDPChannel;
result = SDLNet_UDP_Send(ipxClientSocket, regPacket.channel, &regPacket);
}
static void pingSend(void) {
IPXHeader regHeader;
UDPpacket regPacket;
Bits result;
SDLNet_Write16(0xffff, regHeader.checkSum);
SDLNet_Write16(sizeof(regHeader), regHeader.length);
SDLNet_Write32(0, regHeader.dest.network);
regHeader.dest.addr.byIP.host = 0xffffffff;
regHeader.dest.addr.byIP.port = 0xffff;
SDLNet_Write16(0x2, regHeader.dest.socket);
SDLNet_Write32(0, regHeader.src.network);
memcpy(regHeader.src.addr.byNode.node, localIpxAddr.netnode, sizeof(regHeader.src.addr.byNode.node));
SDLNet_Write16(0x2, regHeader.src.socket);
regHeader.transControl = 0;
regHeader.pType = 0x0;
regPacket.data = (Uint8 *)&regHeader;
regPacket.len = sizeof(regHeader);
regPacket.maxlen = sizeof(regHeader);
regPacket.channel = UDPChannel;
result = SDLNet_UDP_Send(ipxClientSocket, regPacket.channel, &regPacket);
if(!result) {
LOG_MSG("IPX: SDLNet_UDP_Send: %s\n", SDLNet_GetError());
}
}
static void receivePacket(Bit8u *buffer, Bit16s bufSize) {
ECBClass *useECB;
ECBClass *nextECB;
Bit16u *bufword = (Bit16u *)buffer;
Bit16u useSocket = swapByte(bufword[8]);
IPXHeader * tmpHeader;
tmpHeader = (IPXHeader *)buffer;
// Check to see if ping packet
if(useSocket == 0x2) {
// Is this a broadcast?
if((tmpHeader->dest.addr.byIP.host == 0xffffffff) &&
(tmpHeader->dest.addr.byIP.port == 0xffff)) {
// Yes. We should return the ping back to the sender
IPaddress tmpAddr;
UnpackIP(tmpHeader->src.addr.byIP, &tmpAddr);
pingAck(tmpAddr);
return;
}
}
useECB = ECBList;
while(useECB != NULL)
{
nextECB = useECB->nextECB;
if(useECB->iuflag == USEFLAG_LISTENING && useECB->mysocket == useSocket) {
useECB->writeDataBuffer(buffer, bufSize);
useECB->NotifyESR();
return;
}
useECB = nextECB;
}
LOG_IPX("IPX: RX Packet loss!");
}
static void IPX_ClientLoop(void) {
int numrecv;
UDPpacket inPacket;
inPacket.data = (Uint8 *)recvBuffer;
inPacket.maxlen = IPXBUFFERSIZE;
inPacket.channel = UDPChannel;
// Its amazing how much simpler UDP is than TCP
numrecv = SDLNet_UDP_Recv(ipxClientSocket, &inPacket);
if(numrecv) receivePacket(inPacket.data, inPacket.len);
}
void DisconnectFromServer(bool unexpected) {
if(unexpected) LOG_MSG("IPX: Server disconnected unexpectedly");
if(incomingPacket.connected) {
incomingPacket.connected = false;
TIMER_DelTickHandler(&IPX_ClientLoop);
SDLNet_UDP_Close(ipxClientSocket);
}
}
static void sendPacket(ECBClass* sendecb) {
Bit8u outbuffer[IPXBUFFERSIZE];
fragmentDescriptor tmpFrag;
Bit16u i, fragCount,t;
Bit16s packetsize;
Bit16u *wordptr;
Bits result;
UDPpacket outPacket;
sendecb->setInUseFlag(USEFLAG_AVAILABLE);
packetsize = 0;
fragCount = sendecb->getFragCount();
for(i=0;i<fragCount;i++) {
sendecb->getFragDesc(i,&tmpFrag);
if(i==0) {
// Fragment containing IPX header
// Must put source address into header
Bit8u * addrptr;
// source netnum
addrptr = (Bit8u *)&localIpxAddr.netnum;
for(Bit16u m=0;m<4;m++) {
real_writeb(tmpFrag.segment,tmpFrag.offset+m+18,addrptr[m]);
}
// source node number
addrptr = (Bit8u *)&localIpxAddr.netnode;
for(Bit16u m=0;m<6;m++) {
real_writeb(tmpFrag.segment,tmpFrag.offset+m+22,addrptr[m]);
}
// Source socket
real_writew(tmpFrag.segment,tmpFrag.offset+28, swapByte(sendecb->getSocket()));
// blank checksum
real_writew(tmpFrag.segment,tmpFrag.offset, 0xffff);
}
for(t=0;t<tmpFrag.size;t++) {
outbuffer[packetsize] = real_readb(tmpFrag.segment, tmpFrag.offset + t);
packetsize++;
if(packetsize>=IPXBUFFERSIZE) {
LOG_MSG("IPX: Packet size to be sent greater than %d bytes.", IPXBUFFERSIZE);
sendecb->setCompletionFlag(COMP_UNDELIVERABLE);
sendecb->NotifyESR();
return;
}
}
}
// Add length and source socket to IPX header
wordptr = (Bit16u *)&outbuffer[0];
// Blank CRC
//wordptr[0] = 0xffff;
// Length
wordptr[1] = swapByte(packetsize);
// Source socket
//wordptr[14] = swapByte(sendecb->getSocket());
sendecb->getFragDesc(0,&tmpFrag);
real_writew(tmpFrag.segment,tmpFrag.offset+2, swapByte(packetsize));
Bit8u immedAddr[6];
sendecb->getImmAddress(immedAddr);
// filter out broadcasts and local loopbacks
// Real implementation uses the ImmedAddr to check wether this is a broadcast
bool islocalbroadcast=true;
bool isloopback=true;
Bit8u * addrptr;
addrptr = (Bit8u *)&localIpxAddr.netnum;
for(Bitu m=0;m<4;m++) {
if(addrptr[m]!=outbuffer[m+0x6])isloopback=false;
}
addrptr = (Bit8u *)&localIpxAddr.netnode;
for(Bitu m=0;m<6;m++) {
if(addrptr[m]!=outbuffer[m+0xa])isloopback=false;
if(immedAddr[m]!=0xff) islocalbroadcast=false;
}
LOG_IPX("SEND crc:%2x",packetCRC(&outbuffer[0], packetsize));
if(!isloopback) {
outPacket.channel = UDPChannel;
outPacket.data = (Uint8 *)&outbuffer[0];
outPacket.len = packetsize;
outPacket.maxlen = packetsize;
// Since we're using a channel, we won't send the IP address again
result = SDLNet_UDP_Send(ipxClientSocket, UDPChannel, &outPacket);
if(result == 0) {
LOG_MSG("IPX: Could not send packet: %s", SDLNet_GetError());
sendecb->setCompletionFlag(COMP_HARDWAREERROR);
sendecb->NotifyESR();
DisconnectFromServer(true);
return;
} else {
sendecb->setCompletionFlag(COMP_SUCCESS);
LOG_IPX("Packet sent: size: %d",packetsize);
}
}
else sendecb->setCompletionFlag(COMP_SUCCESS);
if(isloopback||islocalbroadcast) {
// Send packet back to ourselves.
receivePacket(&outbuffer[0],packetsize);
LOG_IPX("Packet back: loopback:%d, broadcast:%d",isloopback,islocalbroadcast);
}
sendecb->NotifyESR();
}
static bool pingCheck(IPXHeader * outHeader) {
char buffer[1024];
Bits result;
UDPpacket regPacket;
IPXHeader *regHeader;
regPacket.data = (Uint8 *)buffer;
regPacket.maxlen = sizeof(buffer);
regPacket.channel = UDPChannel;
regHeader = (IPXHeader *)buffer;
result = SDLNet_UDP_Recv(ipxClientSocket, &regPacket);
if (result != 0) {
memcpy(outHeader, regHeader, sizeof(IPXHeader));
return true;
}
return false;
}
bool ConnectToServer(char const *strAddr) {
int numsent;
UDPpacket regPacket;
IPXHeader regHeader;
if(!SDLNet_ResolveHost(&ipxServConnIp, strAddr, (Bit16u)udpPort)) {
// Generate the MAC address. This is made by zeroing out the first two
// octets and then using the actual IP address for the last 4 octets.
// This idea is from the IPX over IP implementation as specified in RFC 1234:
// http://www.faqs.org/rfcs/rfc1234.html
// Select an anonymous UDP port
ipxClientSocket = SDLNet_UDP_Open(0);
if(ipxClientSocket) {
// Bind UDP port to address to channel
UDPChannel = SDLNet_UDP_Bind(ipxClientSocket,-1,&ipxServConnIp);
//ipxClientSocket = SDLNet_TCP_Open(&ipxServConnIp);
SDLNet_Write16(0xffff, regHeader.checkSum);
SDLNet_Write16(sizeof(regHeader), regHeader.length);
// Echo packet with zeroed dest and src is a server registration packet
SDLNet_Write32(0, regHeader.dest.network);
regHeader.dest.addr.byIP.host = 0x0;
regHeader.dest.addr.byIP.port = 0x0;
SDLNet_Write16(0x2, regHeader.dest.socket);
SDLNet_Write32(0, regHeader.src.network);
regHeader.src.addr.byIP.host = 0x0;
regHeader.src.addr.byIP.port = 0x0;
SDLNet_Write16(0x2, regHeader.src.socket);
regHeader.transControl = 0;
regPacket.data = (Uint8 *)&regHeader;
regPacket.len = sizeof(regHeader);
regPacket.maxlen = sizeof(regHeader);
regPacket.channel = UDPChannel;
// Send registration string to server. If server doesn't get
// this, client will not be registered
numsent = SDLNet_UDP_Send(ipxClientSocket, regPacket.channel, &regPacket);
if(!numsent) {
LOG_MSG("IPX: Unable to connect to server: %s", SDLNet_GetError());
SDLNet_UDP_Close(ipxClientSocket);
return false;
} else {
// Wait for return packet from server.
// This will contain our IPX address and port num
Bits result;
Bit32u ticks, elapsed;
ticks = GetTicks();
while(true) {
elapsed = GetTicks() - ticks;
if(elapsed > 5000) {
LOG_MSG("Timeout connecting to server at %s", strAddr);
SDLNet_UDP_Close(ipxClientSocket);
return false;
}
CALLBACK_Idle();
result = SDLNet_UDP_Recv(ipxClientSocket, &regPacket);
if (result != 0) {
memcpy(localIpxAddr.netnode, regHeader.dest.addr.byNode.node, sizeof(localIpxAddr.netnode));
memcpy(localIpxAddr.netnum, regHeader.dest.network, sizeof(localIpxAddr.netnum));
break;
}
}
LOG_MSG("IPX: Connected to server. IPX address is %d:%d:%d:%d:%d:%d", CONVIPX(localIpxAddr.netnode));
incomingPacket.connected = true;
TIMER_AddTickHandler(&IPX_ClientLoop);
return true;
}
} else {
LOG_MSG("IPX: Unable to open socket");
}
} else {
LOG_MSG("IPX: Unable resolve connection to server");
}
return false;
}
void IPX_NetworkInit() {
localIpxAddr.netnum[0] = 0x0;
localIpxAddr.netnum[1] = 0x0;
localIpxAddr.netnum[2] = 0x0;
localIpxAddr.netnum[3] = 0x1;
localIpxAddr.netnode[0] = 0x00;
localIpxAddr.netnode[1] = 0x00;
localIpxAddr.netnode[2] = 0x00;
localIpxAddr.netnode[3] = 0x00;
localIpxAddr.netnode[4] = 0x00;
localIpxAddr.netnode[5] = 0x00;
socketCount = 0;
return;
}
class IPXNET : public Program {
public:
void HelpCommand(const char *helpStr) {
// Help on connect command
if(strcasecmp("connect", helpStr) == 0) {
WriteOut("IPXNET CONNECT opens a connection to an IPX tunneling server running on another\n");
WriteOut("DosBox session. The \"address\" parameter specifies the IP address or host name\n");
WriteOut("of the server computer. One can also specify the UDP port to use. By default\n");
WriteOut("IPXNET uses port 213, the assigned IANA port for IPX tunneling, for its\nconnection.\n\n");
WriteOut("The syntax for IPXNET CONNECT is:\n\n");
WriteOut("IPXNET CONNECT address <port>\n\n");
return;
}
// Help on the disconnect command
if(strcasecmp("disconnect", helpStr) == 0) {
WriteOut("IPXNET DISCONNECT closes the connection to the IPX tunneling server.\n\n");
WriteOut("The syntax for IPXNET DISCONNECT is:\n\n");
WriteOut("IPXNET DISCONNECT\n\n");
return;
}
// Help on the startserver command
if(strcasecmp("startserver", helpStr) == 0) {
WriteOut("IPXNET STARTSERVER starts and IPX tunneling server on this DosBox session. By\n");
WriteOut("default, the server will accept connections on UDP port 213, though this can be\n");
WriteOut("changed. Once the server is started, DosBox will automatically start a client\n");
WriteOut("connection to the IPX tunneling server.\n\n");
WriteOut("The syntax for IPXNET STARTSERVER is:\n\n");
WriteOut("IPXNET STARTSERVER <port>\n\n");
return;
}
// Help on the stop server command
if(strcasecmp("stopserver", helpStr) == 0) {
WriteOut("IPXNET STOPSERVER stops the IPX tunneling server running on this DosBox\nsession.");
WriteOut(" Care should be taken to ensure that all other connections have\nterminated ");
WriteOut("as well sinnce stoping the server may cause lockups on other\nmachines still using ");
WriteOut("the IPX tunneling server.\n\n");
WriteOut("The syntax for IPXNET STOPSERVER is:\n\n");
WriteOut("IPXNET STOPSERVER\n\n");
return;
}
// Help on the ping command
if(strcasecmp("ping", helpStr) == 0) {
WriteOut("IPXNET PING broadcasts a ping request through the IPX tunneled network. In \n");
WriteOut("response, all other connected computers will respond to the ping and report\n");
WriteOut("the time it took to receive and send the ping message.\n\n");
WriteOut("The syntax for IPXNET PING is:\n\n");
WriteOut("IPXNET PING\n\n");
return;
}
// Help on the status command
if(strcasecmp("status", helpStr) == 0) {
WriteOut("IPXNET STATUS reports the current state of this DosBox's sessions IPX tunneling\n");
WriteOut("network. For a list of the computers connected to the network use the IPXNET \n");
WriteOut("PING command.\n\n");
WriteOut("The syntax for IPXNET STATUS is:\n\n");
WriteOut("IPXNET STATUS\n\n");
return;
}
}
void Run(void)
{
WriteOut("IPX Tunneling utility for DosBox\n\n");
if(!cmd->GetCount()) {
WriteOut("The syntax of this command is:\n\n");
WriteOut("IPXNET [ CONNECT | DISCONNECT | STARTSERVER | STOPSERVER | PING | HELP |\n STATUS ]\n\n");
return;
}
if(cmd->FindCommand(1, temp_line)) {
if(strcasecmp("help", temp_line.c_str()) == 0) {
if(!cmd->FindCommand(2, temp_line)) {
WriteOut("The following are valid IPXNET commands:\n\n");
WriteOut("IPXNET CONNECT IPXNET DISCONNECT IPXNET STARTSERVER\n");
WriteOut("IPXNET STOPSERVER IPXNET PING IPXNET STATUS\n\n");
WriteOut("To get help on a specific command, type:\n\n");
WriteOut("IPXNET HELP command\n\n");
} else {
HelpCommand(temp_line.c_str());
return;
}
return;
}
if(strcasecmp("startserver", temp_line.c_str()) == 0) {
if(!isIpxServer) {
if(incomingPacket.connected) {
WriteOut("IPX Tunneling Client alreadu connected to another server. Disconnect first.\n");
return;
}
bool startsuccess;
if(!cmd->FindCommand(2, temp_line)) {
udpPort = 213;
} else {
udpPort = strtol(temp_line.c_str(), NULL, 10);
}
startsuccess = IPX_StartServer((Bit16u)udpPort);
if(startsuccess) {
WriteOut("IPX Tunneling Server started\n");
isIpxServer = true;
ConnectToServer("localhost");
} else {
WriteOut("IPX Tunneling Server failed to start\n");
}
} else {
WriteOut("IPX Tunneling Server already started\n");
}
return;
}
if(strcasecmp("stopserver", temp_line.c_str()) == 0) {
if(!isIpxServer) {
WriteOut("IPX Tunneling Server not running in this DosBox session.\n");
} else {
isIpxServer = false;
DisconnectFromServer(false);
IPX_StopServer();
WriteOut("IPX Tunneling Server stopped.");
}
return;
}
if(strcasecmp("connect", temp_line.c_str()) == 0) {
char strHost[1024];
if(incomingPacket.connected) {
WriteOut("IPX Tunneling Client already connected.\n");
return;
}
if(!cmd->FindCommand(2, temp_line)) {
WriteOut("IPX Server address not specified.\n");
return;
}
strcpy(strHost, temp_line.c_str());
if(!cmd->FindCommand(3, temp_line)) {
udpPort = 213;
} else {
udpPort = strtol(temp_line.c_str(), NULL, 10);
}
if(ConnectToServer(strHost)) {
WriteOut("IPX Tunneling Client connected to server at %s.\n", strHost);
} else {
WriteOut("IPX Tunneling Client failed to connect to server at %s.\n", strHost);
}
return;
}
if(strcasecmp("disconnect", temp_line.c_str()) == 0) {
if(!incomingPacket.connected) {
WriteOut("IPX Tunneling Client not connected.\n");
return;
}
// TODO: Send a packet to the server notifying of disconnect
WriteOut("IPX Tunneling Client disconnected from server.\n");
DisconnectFromServer(false);
return;
}
if(strcasecmp("status", temp_line.c_str()) == 0) {
WriteOut("IPX Tunneling Status:\n\n");
WriteOut("Server status: ");
if(isIpxServer) WriteOut("ACTIVE\n"); else WriteOut("INACTIVE\n");
WriteOut("Client status: ");
if(incomingPacket.connected) {
WriteOut("CONNECTED -- Server at %d.%d.%d.%d port %d\n", CONVIP(ipxServConnIp.host), udpPort);
} else {
WriteOut("DISCONNECTED\n");
}
if(isIpxServer) {
WriteOut("List of active connections:\n\n");
int i;
IPaddress *ptrAddr;
for(i=0;i<SOCKETTABLESIZE;i++) {
if(IPX_isConnectedToServer(i,&ptrAddr)) {
WriteOut(" %d.%d.%d.%d from port %d\n", CONVIP(ptrAddr->host), SDLNet_Read16(&ptrAddr->port));
}
}
WriteOut("\n");
}
return;
}
if(strcasecmp("ping", temp_line.c_str()) == 0) {
Bit32u ticks;
IPXHeader pingHead;
if(!incomingPacket.connected) {
WriteOut("IPX Tunneling Client not connected.\n");
return;
}
TIMER_DelTickHandler(&IPX_ClientLoop);
WriteOut("Sending broadcast ping:\n\n");
pingSend();
ticks = GetTicks();
while((GetTicks() - ticks) < 1500) {
CALLBACK_Idle();
if(pingCheck(&pingHead)) {
WriteOut("Response from %d.%d.%d.%d, port %d time=%dms\n", CONVIP(pingHead.src.addr.byIP.host), SDLNet_Read16(&pingHead.src.addr.byIP.port), GetTicks() - ticks);
}
}
TIMER_AddTickHandler(&IPX_ClientLoop);
return;
}
}
}
};
static void IPXNET_ProgramStart(Program * * make) {
*make=new IPXNET;
}
Bitu IPX_ESRHandler(void) {
LOG_IPX("ESR: >>>>>>>>>>>>>>>" );
while(ESRList!=NULL) {
// LOG_IPX("ECB: SN%7d notified.", ESRList->SerialNumber);
if(ESRList->databuffer) ESRList->writeData();
if(ESRList->getESRAddr()) {
// setup registers
SegSet16(es, RealSeg(ESRList->ECBAddr));
reg_si = RealOff(ESRList->ECBAddr);
reg_al = 0xff;
CALLBACK_RunRealFar(RealSeg(ESRList->getESRAddr()),
RealOff(ESRList->getESRAddr()));
}
delete ESRList;
} // while
IO_WriteB(0xa0,0x63); //EOI11
IO_WriteB(0x20,0x62); //EOI2
LOG_IPX("ESR: <<<<<<<<<<<<<<<");
return CBRET_NONE;
}
void VFILE_Remove(const char *name);
class IPX: public Module_base {
private:
CALLBACK_HandlerObject callback_ipx;
CALLBACK_HandlerObject callback_esr;
CALLBACK_HandlerObject callback_ipxint;
RealPt old_73_vector;
static Bit16u dospage;
public:
IPX(Section* configuration):Module_base(configuration) {
Section_prop * section = static_cast<Section_prop *>(configuration);
if(!section->Get_bool("ipx")) return;
if(!SDLNetInited) {
if(SDLNet_Init() == -1){
LOG_MSG("SDLNet_Init failed: %s\n", SDLNet_GetError());
return;
}
SDLNetInited = true;
}
ECBList = NULL;
ESRList = NULL;
isIpxServer = false;
isIpxConnected = false;
IPX_NetworkInit();
DOS_AddMultiplexHandler(IPX_Multiplex);
callback_ipx.Install(&IPX_Handler,CB_RETF,"IPX Handler");
ipx_callback = callback_ipx.Get_RealPointer();
callback_ipxint.Install(&IPX_IntHandler,CB_IRET,"IPX (int 7a)");
callback_ipxint.Set_RealVec(0x7a);
callback_esr.Allocate(&IPX_ESRHandler,"IPX_ESR");
Bit16u call_ipxesr1 = callback_esr.Get_callback();
if(!dospage) dospage = DOS_GetMemory(2); // can not be freed yet
PhysPt phyDospage = PhysMake(dospage,0);
LOG_IPX("ESR callback address: %x, HandlerID %d", phyDospage,call_ipxesr1);
//save registers
phys_writeb(phyDospage+0,(Bit8u)0xFA); // CLI
phys_writeb(phyDospage+1,(Bit8u)0x60); // PUSHA
phys_writeb(phyDospage+2,(Bit8u)0x1E); // PUSH DS
phys_writeb(phyDospage+3,(Bit8u)0x06); // PUSH ES
phys_writew(phyDospage+4,(Bit16u)0xA00F); // PUSH FS
phys_writew(phyDospage+6,(Bit16u)0xA80F); // PUSH GS
// callback
phys_writeb(phyDospage+8,(Bit8u)0xFE); // GRP 4
phys_writeb(phyDospage+9,(Bit8u)0x38); // Extra Callback instruction
phys_writew(phyDospage+10,call_ipxesr1); // Callback identifier
// register recreation
phys_writew(phyDospage+12,(Bit16u)0xA90F); // POP GS
phys_writew(phyDospage+14,(Bit16u)0xA10F); // POP FS
phys_writeb(phyDospage+16,(Bit8u)0x07); // POP ES
phys_writeb(phyDospage+17,(Bit8u)0x1F); // POP DS
phys_writeb(phyDospage+18,(Bit8u)0x61); // POPA
phys_writeb(phyDospage+19,(Bit8u)0xCF); // IRET: restores flags, CS, IP
// IPX version 2.12
//phys_writeb(phyDospage+27,(Bit8u)0x2);
//phys_writeb(phyDospage+28,(Bit8u)0x12);
//IPXVERpointer = RealMake(dospage,27);
RealPt ESRRoutineBase = RealMake(dospage, 0);
// Interrupt enabling
RealSetVec(0x73,ESRRoutineBase,old_73_vector); // IRQ11
IO_WriteB(0xa1,IO_ReadB(0xa1)&(~8)); // enable IRQ11
PROGRAMS_MakeFile("IPXNET.COM",IPXNET_ProgramStart);
}
~IPX() {
Section_prop * section = static_cast<Section_prop *>(m_configuration);
PIC_RemoveEvents(IPX_AES_EventHandler);
if(!section->Get_bool("ipx")) return;
if(isIpxServer) {
isIpxServer = false;
IPX_StopServer();
}
DisconnectFromServer(false);
DOS_DelMultiplexHandler(IPX_Multiplex);
RealSetVec(0x73,old_73_vector);
IO_WriteB(0xa1,IO_ReadB(0xa1)|8); // disable IRQ11
PhysPt phyDospage = PhysMake(dospage,0);
for(Bitu i = 0;i < 32;i++)
phys_writeb(phyDospage+i,(Bit8u)0x00);
VFILE_Remove("IPXNET.COM");
}
};
static IPX* test;
void IPX_ShutDown(Section* sec) {
delete test;
}
void IPX_Init(Section* sec) {
test = new IPX(sec);
sec->AddDestroyFunction(&IPX_ShutDown,true);
}
//Initialize static members;
Bit16u IPX::dospage = 0;
#endif
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