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dosbox-wii/src/hardware/serialport/softmodem.cpp

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/*
* 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: softmodem.cpp,v 1.10 2009/01/14 22:24:39 qbix79 Exp $ */
#include "dosbox.h"
#if C_MODEM
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "support.h"
#include "serialport.h"
#include "softmodem.h"
#include "misc_util.h"
//#include "mixer.h"
CSerialModem::CSerialModem(Bitu id, CommandLine* cmd):CSerial(id, cmd) {
InstallationSuccessful=false;
connected=false;
rqueue=new CFifo(MODEM_BUFFER_QUEUE_SIZE);
tqueue=new CFifo(MODEM_BUFFER_QUEUE_SIZE);
// Default to direct null modem connection. Telnet mode interprets IAC codes
telnetmode = false;
// Initialize the sockets and setup the listening port
listenport = 23;
waitingclientsocket=0;
clientsocket = 0;
serversocket = 0;
getBituSubstring("listenport:", &listenport, cmd);
// TODO: Fix dialtones if requested
//mhd.chan=MIXER_AddChannel((MIXER_MixHandler)this->MODEM_CallBack,8000,"MODEM");
//MIXER_Enable(mhd.chan,false);
//MIXER_SetMode(mhd.chan,MIXER_16MONO);
CSerial::Init_Registers();
Reset(); // reset calls EnterIdleState
setEvent(SERIAL_POLLING_EVENT,1);
InstallationSuccessful=true;
}
CSerialModem::~CSerialModem() {
if(serversocket) delete serversocket;
if(clientsocket) delete clientsocket;
if(waitingclientsocket) delete waitingclientsocket;
delete rqueue;
delete tqueue;
// remove events
for(Bitu i = SERIAL_BASE_EVENT_COUNT+1; i <= SERIAL_MODEM_EVENT_COUNT; i++)
removeEvent(i);
}
void CSerialModem::handleUpperEvent(Bit16u type) {
switch(type)
{
case SERIAL_RX_EVENT:
{
break;
}
case MODEM_TX_EVENT:
{
if(tqueue->left()) {
tqueue->addb(waiting_tx_character);
if(tqueue->left() < 2) {
CSerial::setCTS(false);
}
} else {
static Bits lcount=0;
if (lcount<1000) {
lcount++;
LOG_MSG("MODEM: TX Buffer overflow!");
}
}
ByteTransmitted();
break;
}
case SERIAL_POLLING_EVENT:
{
Timer2();
setEvent(SERIAL_POLLING_EVENT,1);
break;
}
case MODEM_RING_EVENT:
{
break;
}
}
}
void CSerialModem::SendLine(const char *line) {
rqueue->addb(0xd);
rqueue->addb(0xa);
rqueue->adds((Bit8u *)line,strlen(line));
rqueue->addb(0xd);
rqueue->addb(0xa);
}
// only for numbers < 1000...
void CSerialModem::SendNumber(Bitu val) {
rqueue->addb(0xd);
rqueue->addb(0xa);
rqueue->addb(val/100+'0');
val = val%100;
rqueue->addb(val/10+'0');
val = val%10;
rqueue->addb(val+'0');
rqueue->addb(0xd);
rqueue->addb(0xa);
}
void CSerialModem::SendRes(ResTypes response) {
char const * string;Bitu code;
switch (response)
{
case ResNONE: return;
case ResOK: string="OK"; code=0; break;
case ResERROR: string="ERROR"; code=4; break;
case ResRING: string="RING"; code=2; break;
case ResNODIALTONE: string="NO DIALTONE"; code=6; break;
case ResNOCARRIER: string="NO CARRIER" ;code=3; break;
case ResCONNECT: string="CONNECT 57600"; code=1; break;
}
if(doresponse!=1) {
if(doresponse==2 && (response==ResRING ||
response == ResCONNECT || response==ResNOCARRIER)) return;
if(numericresponse) SendNumber(code);
else SendLine(string);
//if(CSerial::CanReceiveByte()) // very fast response
// if(rqueue->inuse() && CSerial::getRTS())
// { Bit8u rbyte =rqueue->getb();
// CSerial::receiveByte(rbyte);
// LOG_MSG("Modem: sending byte %2x back to UART2",rbyte);
// }
LOG_MSG("Modem response: %s", string);
}
}
bool CSerialModem::Dial(char * host) {
// Scan host for port
Bit16u port;
char * hasport=strrchr(host,':');
if (hasport) {
*hasport++=0;
port=(Bit16u)atoi(hasport);
}
else port=MODEM_DEFAULT_PORT;
// Resolve host we're gonna dial
LOG_MSG("Connecting to host %s port %d",host,port);
clientsocket = new TCPClientSocket(host, port);
if(!clientsocket->isopen) {
delete clientsocket;
clientsocket=0;
LOG_MSG("Failed to connect.");
SendRes(ResNOCARRIER);
EnterIdleState();
return false;
} else {
EnterConnectedState();
return true;
}
}
void CSerialModem::AcceptIncomingCall(void) {
if(waitingclientsocket) {
clientsocket=waitingclientsocket;
waitingclientsocket=0;
EnterConnectedState();
} else {
EnterIdleState();
}
}
Bitu CSerialModem::ScanNumber(char * & scan) {
Bitu ret=0;
while (char c=*scan) {
if (c>='0' && c<='9') {
ret*=10;
ret+=c-'0';
scan++;
} else break;
}
return ret;
}
void CSerialModem::Reset(){
EnterIdleState();
cmdpos = 0;
cmdbuf[0]=0;
oldDTRstate = getDTR();
flowcontrol = 0;
plusinc = 0;
if(clientsocket) {
delete clientsocket;
clientsocket=0;
}
memset(&reg,0,sizeof(reg));
reg[MREG_AUTOANSWER_COUNT]=0; // no autoanswer
reg[MREG_RING_COUNT] = 1;
reg[MREG_ESCAPE_CHAR]='+';
reg[MREG_CR_CHAR]='\r';
reg[MREG_LF_CHAR]='\n';
reg[MREG_BACKSPACE_CHAR]='\b';
cmdpause = 0;
echo = true;
doresponse = 0;
numericresponse = false;
/* Default to direct null modem connection. Telnet mode interprets IAC codes */
telnetmode = false;
}
void CSerialModem::EnterIdleState(void){
connected=false;
ringing=false;
if(clientsocket) {
delete clientsocket;
clientsocket=0;
}
if(waitingclientsocket) { // clear current incoming socket
delete waitingclientsocket;
waitingclientsocket=0;
}
// get rid of everything
if(serversocket) {
while(waitingclientsocket=serversocket->Accept())
delete waitingclientsocket;
} else if (listenport) {
serversocket=new TCPServerSocket(listenport);
if(!serversocket->isopen) {
LOG_MSG("Serial%d: Modem could not open TCP port %d.",COMNUMBER,listenport);
delete serversocket;
serversocket=0;
} else LOG_MSG("Serial%d: Modem listening on port %d...",COMNUMBER,listenport);
}
waitingclientsocket=0;
commandmode = true;
CSerial::setCD(false);
CSerial::setRI(false);
CSerial::setDSR(true);
CSerial::setCTS(true);
tqueue->clear();
}
void CSerialModem::EnterConnectedState(void) {
if(serversocket) {
// we don't accept further calls
delete serversocket;
serversocket=0;
}
SendRes(ResCONNECT);
commandmode = false;
memset(&telClient, 0, sizeof(telClient));
connected = true;
ringing = false;
CSerial::setCD(true);
CSerial::setRI(false);
}
void CSerialModem::DoCommand() {
cmdbuf[cmdpos] = 0;
cmdpos = 0; //Reset for next command
upcase(cmdbuf);
LOG_MSG("Command sent to modem: ->%s<-\n", cmdbuf);
/* Check for empty line, stops dialing and autoanswer */
if (!cmdbuf[0]) {
reg[0]=0; // autoanswer off
return;
// }
//else {
//MIXER_Enable(mhd.chan,false);
// dialing = false;
// SendRes(ResNOCARRIER);
// goto ret_none;
// }
}
/* AT command set interpretation */
if ((cmdbuf[0] != 'A') || (cmdbuf[1] != 'T')) {
SendRes(ResERROR);
return;
}
if (strstr(cmdbuf,"NET0")) {
telnetmode = false;
SendRes(ResOK);
return;
}
else if (strstr(cmdbuf,"NET1")) {
telnetmode = true;
SendRes(ResOK);
return;
}
char * scanbuf;
scanbuf=&cmdbuf[2];
char chr;
Bitu num;
while (chr=*scanbuf++) {
switch (chr) {
case 'D': // Dial
{
char * foundstr=&scanbuf[0];
if (*foundstr=='T' || *foundstr=='P') foundstr++;
// Small protection against empty line and long string
if ((!foundstr[0]) || (strlen(foundstr)>100)) {
SendRes(ResERROR);
return;
}
char* helper;
// scan for and remove spaces; weird bug: with leading spaces in the string,
// SDLNet_ResolveHost will return no error but not work anyway (win)
while(foundstr[0]==' ') foundstr++;
helper=foundstr;
helper+=strlen(foundstr);
while(helper[0]==' ') {
helper[0]=0;
helper--;
}
if (strlen(foundstr) >= 12) {
// Check if supplied parameter only consists of digits
bool isNum = true;
for (Bitu i=0; i<strlen(foundstr); i++)
if (foundstr[i] < '0' || foundstr[i] > '9')
isNum = false;
if (isNum) {
// Parameter is a number with at least 12 digits => this cannot
// be a valid IP/name
// Transform by adding dots
char buffer[128];
Bitu j = 0;
for (Bitu i=0; i<strlen(foundstr); i++) {
buffer[j++] = foundstr[i];
// Add a dot after the third, sixth and ninth number
if (i == 2 || i == 5 || i == 8)
buffer[j++] = '.';
// If the string is longer than 12 digits,
// interpret the rest as port
if (i == 11 && strlen(foundstr)>12)
buffer[j++] = ':';
}
buffer[j] = 0;
foundstr = buffer;
}
}
Dial(foundstr);
return;
}
case 'I': //Some strings about firmware
switch (num=ScanNumber(scanbuf)) {
case 3:SendLine("DosBox Emulated Modem Firmware V1.00");break;
case 4:SendLine("Modem compiled for DosBox version " VERSION);break;
};break;
case 'E': //Echo on/off
switch (num=ScanNumber(scanbuf)) {
case 0:echo = false;break;
case 1:echo = true;break;
};break;
case 'V':
switch (num=ScanNumber(scanbuf)) {
case 0:numericresponse = true;break;
case 1:numericresponse = false;break;
};break;
case 'H': //Hang up
switch (num=ScanNumber(scanbuf)) {
case 0:
if (connected) {
SendRes(ResNOCARRIER);
EnterIdleState();
return;
}
//Else return ok
};break;
case 'O': //Return to data mode
switch (num=ScanNumber(scanbuf))
{
case 0:
if (clientsocket) {
commandmode = false;
return;
} else {
SendRes(ResERROR);
return;
}
};break;
case 'T': //Tone Dial
case 'P': //Pulse Dial
break;
case 'M': //Monitor
case 'L': //Volume
ScanNumber(scanbuf);
break;
case 'A': //Answer call
if (waitingclientsocket) {
AcceptIncomingCall();
} else {
SendRes(ResERROR);
return;
}
return;
case 'Z': //Reset and load profiles
{
// scan the number away, if any
ScanNumber(scanbuf);
if (clientsocket/*socket*/) SendRes(ResNOCARRIER);
Reset();
break;
}
case ' ': //Space just skip
break;
case 'Q': // Response options
{ // 0 = all on, 1 = all off,
// 2 = no ring and no connect/carrier in answermode
Bitu val = ScanNumber(scanbuf);
if(!(val>2)) {
doresponse=val;
break;
} else {
SendRes(ResERROR);
return;
}
}
case 'S': //Registers
{
Bitu index=ScanNumber(scanbuf);
if(index>=SREGS) {
SendRes(ResERROR);
return; //goto ret_none;
}
while(scanbuf[0]==' ') scanbuf++; // skip spaces
if(scanbuf[0]=='=') { // set register
scanbuf++;
while(scanbuf[0]==' ') scanbuf++; // skip spaces
Bitu val = ScanNumber(scanbuf);
reg[index]=val;
break;
}
else if(scanbuf[0]=='?') { // get register
SendNumber(reg[index]);
scanbuf++;
break;
}
//else LOG_MSG("print reg %d with %d",index,reg[index]);
}
break;
case '&':
{
if(scanbuf[0]!=0) {
char ch = scanbuf[0];
scanbuf++;
switch(ch) {
case 'K':
{
Bitu val = ScanNumber(scanbuf);
if(val<5) flowcontrol=val;
else {
SendRes(ResERROR);
return;
}
break;
}
default:
{
scanbuf++;
LOG_MSG("Modem: Unhandled command: &%c%d",ch,ScanNumber(scanbuf));
break;
}
}
} else {
SendRes(ResERROR);
return;
}
}
break;
default:
LOG_MSG("Modem: Unhandled command: %c%d",chr,ScanNumber(scanbuf));
}
}
SendRes(ResOK);
return;
}
void CSerialModem::TelnetEmulation(Bit8u * data, Bitu size) {
Bitu i;
Bit8u c;
for(i=0;i<size;i++) {
c = data[i];
if(telClient.inIAC) {
if(telClient.recCommand) {
if((c != 0) && (c != 1) && (c != 3)) {
LOG_MSG("MODEM: Unrecognized option %d", c);
if(telClient.command>250) {
/* Reject anything we don't recognize */
tqueue->addb(0xff);
tqueue->addb(252);
tqueue->addb(c); /* We won't do crap! */
}
}
switch(telClient.command) {
case 251: /* Will */
if(c == 0) telClient.binary[TEL_SERVER] = true;
if(c == 1) telClient.echo[TEL_SERVER] = true;
if(c == 3) telClient.supressGA[TEL_SERVER] = true;
break;
case 252: /* Won't */
if(c == 0) telClient.binary[TEL_SERVER] = false;
if(c == 1) telClient.echo[TEL_SERVER] = false;
if(c == 3) telClient.supressGA[TEL_SERVER] = false;
break;
case 253: /* Do */
if(c == 0) {
telClient.binary[TEL_CLIENT] = true;
tqueue->addb(0xff);
tqueue->addb(251);
tqueue->addb(0); /* Will do binary transfer */
}
if(c == 1) {
telClient.echo[TEL_CLIENT] = false;
tqueue->addb(0xff);
tqueue->addb(252);
tqueue->addb(1); /* Won't echo (too lazy) */
}
if(c == 3) {
telClient.supressGA[TEL_CLIENT] = true;
tqueue->addb(0xff);
tqueue->addb(251);
tqueue->addb(3); /* Will Suppress GA */
}
break;
case 254: /* Don't */
if(c == 0) {
telClient.binary[TEL_CLIENT] = false;
tqueue->addb(0xff);
tqueue->addb(252);
tqueue->addb(0); /* Won't do binary transfer */
}
if(c == 1) {
telClient.echo[TEL_CLIENT] = false;
tqueue->addb(0xff);
tqueue->addb(252);
tqueue->addb(1); /* Won't echo (fine by me) */
}
if(c == 3) {
telClient.supressGA[TEL_CLIENT] = true;
tqueue->addb(0xff);
tqueue->addb(251);
tqueue->addb(3); /* Will Suppress GA (too lazy) */
}
break;
default:
LOG_MSG("MODEM: Telnet client sent IAC %d", telClient.command);
break;
}
telClient.inIAC = false;
telClient.recCommand = false;
continue;
} else {
if(c==249) {
/* Go Ahead received */
telClient.inIAC = false;
continue;
}
telClient.command = c;
telClient.recCommand = true;
if((telClient.binary[TEL_SERVER]) && (c == 0xff)) {
/* Binary data with value of 255 */
telClient.inIAC = false;
telClient.recCommand = false;
rqueue->addb(0xff);
continue;
}
}
} else {
if(c == 0xff) {
telClient.inIAC = true;
continue;
}
rqueue->addb(c);
}
}
}
void CSerialModem::Timer2(void) {
unsigned long args = 1;
bool sendbyte = true;
Bitu usesize;
Bit8u txval;
Bitu txbuffersize =0;
// check for bytes to be sent to port
if(CSerial::CanReceiveByte())
if(rqueue->inuse() && (CSerial::getRTS()||(flowcontrol!=3))) {
Bit8u rbyte = rqueue->getb();
//LOG_MSG("Modem: sending byte %2x back to UART3",rbyte);
CSerial::receiveByte(rbyte);
}
// Check for eventual break command
if (!commandmode) cmdpause++;
// Handle incoming data from serial port, read as much as available
CSerial::setCTS(true); // buffer will get 'emptier', new data can be received
while (tqueue->inuse()) {
txval = tqueue->getb();
if (commandmode) {
if (echo) {
rqueue->addb(txval);
//LOG_MSG("Echo back to queue: %x",txval);
}
if (txval==0xa) continue; //Real modem doesn't seem to skip this?
else if (txval==0x8 && (cmdpos > 0)) --cmdpos; // backspace
else if (txval==0xd) DoCommand(); // return
else if (txval != '+') {
if(cmdpos<99) {
cmdbuf[cmdpos] = txval;
cmdpos++;
}
}
}
else {// + character
// 1000 ticks have passed, can check for pause command
if (cmdpause > 1000) {
if(txval ==reg[MREG_ESCAPE_CHAR]) // +
{
plusinc++;
if(plusinc>=3) {
LOG_MSG("Modem: Entering command mode(escape sequence)");
commandmode = true;
SendRes(ResOK);
plusinc = 0;
}
sendbyte=false;
} else {
plusinc=0;
}
// If not a special pause command, should go for bigger blocks to send
}
tmpbuf[txbuffersize] = txval;
txbuffersize++;
}
} // while loop
if (clientsocket && sendbyte && txbuffersize) {
// down here it saves a lot of network traffic
clientsocket->SendArray(tmpbuf,txbuffersize);
//TODO error testing
}
// Handle incoming to the serial port
if(!commandmode && clientsocket && rqueue->left()) {
usesize = rqueue->left();
if (usesize>16) usesize=16;
if(!clientsocket->ReceiveArray(tmpbuf, &usesize)) {
SendRes(ResNOCARRIER);
EnterIdleState();
} else if(usesize) {
// LOG_MSG("rcv:%d", result);
// Filter telnet commands
if(telnetmode) TelnetEmulation(tmpbuf, usesize);
else rqueue->adds(tmpbuf,usesize);
cmdpause = 0;
}
}
// Check for incoming calls
if (!connected && !waitingclientsocket && serversocket) {
waitingclientsocket=serversocket->Accept();
if(waitingclientsocket) {
if(!CSerial::getDTR()) {
// accept no calls with DTR off; TODO: AT &Dn
EnterIdleState();
} else {
ringing=true;
SendRes(ResRING);
CSerial::setRI(!CSerial::getRI());
//MIXER_Enable(mhd.chan,true);
ringtimer = 3000;
reg[1] = 0; //Reset ring counter reg
}
}
}
if (ringing) {
if (ringtimer <= 0) {
reg[1]++;
if ((reg[0]>0) && (reg[0]>=reg[1])) {
AcceptIncomingCall();
return;
}
SendRes(ResRING);
CSerial::setRI(!CSerial::getRI());
//MIXER_Enable(mhd.chan,true);
ringtimer = 3000;
}
--ringtimer;
}
}
//TODO
void CSerialModem::RXBufferEmpty() {
// see if rqueue has some more bytes
if(rqueue->inuse() && (CSerial::getRTS()||(flowcontrol!=3))){
Bit8u rbyte = rqueue->getb();
//LOG_MSG("Modem: sending byte %2x back to UART1",rbyte);
CSerial::receiveByte(rbyte);
}
}
void CSerialModem::transmitByte(Bit8u val, bool first) {
waiting_tx_character=val;
setEvent(MODEM_TX_EVENT, bytetime); // TX event
if(first) ByteTransmitting();
//LOG_MSG("MODEM: Byte %x to be transmitted",val);
}
void CSerialModem::updatePortConfig(Bit16u, Bit8u lcr) {
// nothing to do here right?
}
void CSerialModem::updateMSR() {
// think it is not needed
}
void CSerialModem::setBreak(bool) {
// TODO: handle this
}
void CSerialModem::setRTSDTR(bool rts, bool dtr) {
setDTR(dtr);
}
void CSerialModem::setRTS(bool val) {
}
void CSerialModem::setDTR(bool val) {
if(!val && connected) {
// If DTR goes low, hang up.
SendRes(ResNOCARRIER);
EnterIdleState();
LOG_MSG("Modem: Hang up due to dropped DTR.");
}
}
/*
void CSerialModem::updateModemControlLines() {
//bool txrdy=tqueue->left();
//if(CSerial::getRTS() && txrdy) CSerial::setCTS(true);
//else CSerial::setCTS(tqueue->left());
// If DTR goes low, hang up.
if(connected)
if(oldDTRstate)
if(!getDTR()) {
SendRes(ResNOCARRIER);
EnterIdleState();
LOG_MSG("Modem: Hang up due to dropped DTR.");
}
oldDTRstate = getDTR();
}
*/
#endif
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