void doLinemode(struct WindRec *tw)
{
short i;
unsigned char subBeginSeq[4] = {IAC,TEL_SB,N_LINEMODE,L_SLC};
unsigned char subEndSeq[2] = {IAC,TEL_SE};
unsigned char toSend[3];
tw->lmodeBits = 0;
tw->lmode = TRUE;
tw->litNext = FALSE;
netwrite(tw->port,subBeginSeq,4);
opts_debug_print("SENT: IAC SB LINEMODE SLC");
for (i=1; i<= SLC_MAX; i++)
{
if (tw->slc[i]==255)
{
toSend[0] = i;
toSend[1] = SLC_NOSUPPORT;
toSend[2] = 0;
#ifdef OPTS_DEBUG
sprintf(munger," %s NO_SUPPORT 0",LMoptions[i]);
#endif
}
else
{
toSend[0] = i;
toSend[1] = SLC_VALUE;
toSend[2] = tw->slc[i];
#ifdef OPTS_DEBUG
sprintf(munger," %s VALUE %d",LMoptions[i],(short)tw->slc[i]);
#endif
}
opts_debug_print(munger);
netwrite(tw->port,toSend,3);
}
opts_debug_print("SENT: IAC SE");
netpush(tw->port);
netwrite(tw->port,subEndSeq,2);
}
void process_key(unsigned char ascii,struct WindRec *tw)
{
if (tw->litNext) {
//do no processing on next key
tw->litNext = FALSE;
kbwrite(tw, &ascii, 1);
if (tw->echo) {
if (ascii>31 && ascii <127) {
/* add these chars to buffer */
parse(tw, &ascii, 1);
}
return;
}
}
if (tw->lmodeBits & 2) {
// TRAPSIG mode active
unsigned char toSend[2] = {IAC,0};
short whichSignal = 0;
if (ascii == tw->slc[SLC_IP]) {
whichSignal = SLC_IP;
toSend[1] = TEL_IP;
} else if (ascii == tw->slc[SLC_SUSP]) {
whichSignal = SLC_SUSP;
toSend[1] = TEL_SUSP;
}
// RAB BetterTelnet 2.0b1
// The defaults in parse.h are to send ABORT on ^\ which is usually correct, but
// feel free to hack this (in parse.h, not here) if BRK is better in your configuration.
else if (ascii == tw->slc[SLC_ABORT])
{
whichSignal = SLC_ABORT;
toSend[1] = TEL_ABORT;
}
else if (ascii == tw->slc[SLC_BRK]) // RAB BetterTelnet 2.0b1
{
whichSignal = SLC_BRK;
toSend[1] = TEL_BREAK;
}
if (toSend[1]) //if we have a signal to catch
{
// if (tw->echo)
// parse(tw, &ascii, 1); // echo if we should
tw->kblen=0; //zero out the buffer
netpush(tw->port);
netwrite(tw->port,toSend,2); //send IAC whatever
if (tw->slcLevel[whichSignal] & SLC_FLUSHIN)
{
unsigned char dm[2] = {IAC,TEL_DM};
netpush(tw->port);
netUrgent();//send next as urgent data
netwrite(tw->port,dm,2);//send IAC DM
}
if (tw->slcLevel[whichSignal] & SLC_FLUSHOUT)
{
unsigned char tm[3] = {IAC,TEL_DOTEL,N_TIMING};
tw->timing = 1; //tell ourselves to wait for WILL TIMING
netpush(tw->port);
netwrite(tw->port,tm,3);//send DO TIMING
}
return;
}
}
if ((tw->lmodeBits & L_SOFT_TAB)&&(ascii == 0x09)) // SOFT_TAB mode active; expand tab into spaces
{
short numSpaces = VSIgetNextTabDistance();
unsigned char spacechar = ' ';
while (numSpaces-- > 0) {
kbwrite(tw, &spacechar, 1);
}
if (tw->echo)
parse(tw, &ascii, 1);
return;
}
if (tw->lmodeBits & L_EDIT) //handle editing functions
{
if (ascii == '\015') //CR
{ //since we are in edit, send the buffer and CR-LF
kbflush(tw);
netpush(tw->port);
netwrite(tw->port,"\015\012",2);
if (tw->echo)
parse(tw,(unsigned char *) "\012\015",2);
return;
}
if (ascii == tw->slc[SLC_EC]) //kill the character
{
if (tw->echo)
parse(tw,(unsigned char *) "\010 \010",3);
tw->kblen--;
return;
}
else if (ascii == tw->slc[SLC_AO]) //kill the line
{
while (tw->kblen >0)
{
if (tw->echo)
parse(tw,(unsigned char *) "\010 \010",3);
tw->kblen--;
}
return;
}
else if (ascii == tw->slc[SLC_EL]) //kill the line
{
while (tw->kblen >0)
{
if (tw->echo)
parse(tw,(unsigned char *) "\010 \010",3);
tw->kblen--;
}
return;
}
else if ((ascii == tw->slc[SLC_EOF]) && (tw->lmodeBits & 2))
{ //push the buffer, send IAC EOF (RAB BetterTelnet 2.0b1 - only under TRAPSIG)
char eofString[2] = { IAC, TEL_EOF };
kbflush(tw);
// RAB BetterTelnet 2.0b1 - BAD! BAD! BAD!
// Fix for *BSD (and probably others):
// Putting ^D into Telnet's key buffer after sending an EOF could make it pop up later, so
// hitting some keys (arrows seemed to do the trick) that flushed Telnet's key buffer
// after a cat command which terminated with ^D caused a logout. Yuck.
// tw->kbbuf[0]=ascii;
// tw->kblen=1;
netpush(tw->port);
netwrite(tw->port,eofString, 2);
return;
}
// RAB BetterTelnet 2.0b1
// We don't need to do this down here if we're already handling TRAPSIG mode
// separately. The SUSP (usually ^Z) char is part of TRAPSIG, not EDIT.
// else if (ascii == tw->slc[SLC_SUSP])
// {
// char eofString[2] = { IAC, TEL_SUSP };
// if (tw->kblen > 0)
// netwrite(tw->port, tw->kbbuf, tw->kblen);
// tw->kblen = 0;
// netpush(tw->port);
// netwrite(tw->port,eofString, 2);
// return;
// }
else if (ascii == tw->slc[SLC_EW])
{
while ((tw->kbbuf[tw->kblen-1] != 0x20)&&(tw->kblen >= 0)) //while its not a space
{
if (tw->echo)
parse(tw,(unsigned char *)"\010 \010",3);
tw->kblen--;
}
}
else if (ascii == tw->slc[SLC_RP])
{
VSredrawLine(tw->vs);
return;
}
else if (ascii == tw->slc[SLC_LNEXT])
{
tw->litNext = TRUE;
return;
}
else if (ascii == tw->slc[SLC_XON])
{
if (tw->allow_flow) { //remote flow control can turn this off
tw->enabled = 1; // oops small bug (RAB BetterTelnet 2.0b1)
changeport(scrn, scrn);
}
return;
}
else if (ascii == tw->slc[SLC_XOFF])
{
if (tw->allow_flow) { //remote flow control can turn this off
tw->enabled = 0;
changeport(scrn, scrn);
}
return;
}
else if ((ascii == tw->slc[SLC_FORW1])||(ascii == tw->slc[SLC_FORW1]))
{
kbflush(tw);
netwrite(tw->port,&ascii,1);
return;
}
//ok, at this point, we are past all local editing functions. Now, add the character to the buffer.
else
{
kbwrite(tw, &ascii, 1);
}
}
else if (ascii == '\015') //CR; map this to CR-LF
{
unsigned char toSend[2] = {0x0D,0x00};
netpush(tw->port);
netwrite(tw->port,toSend,2);
if (tw->echo)
parse(tw,(unsigned char *) "\012\015",2);
return;
}
else //not editing; send it
{
netpush(tw->port);
netwrite( tw->port, &ascii, 1); // if full send buffer
}
if (tw->echo) /* Handle local ECHOs */
{
if (ascii>31 && ascii <127) /* add these chars to buffer */
parse(tw, &ascii, 1);
else /* not printable char */
{
if (!(tw->lmodeBits & L_LIT_ECHO)) //don't echo if this is set
{
ascii='@'+ascii;
parse(tw,(unsigned char *) "^",1);
parse(tw, &ascii, 1);
}
}
}
}
void linemode_suboption(struct WindRec *tw)
{
switch(tw->parsedat[1]) {
char s[80];
case L_MODE: /* change mode */
#ifdef OPTS_DEBUG
strcpy(s, "RECV: SB LINEMODE MODE => ");
DemangleLineModeShort(s, tw->parsedat[2]);
opts_debug_print(s);
#endif
if (tw->lineAllow) { // First make sure we allowed linemode in the first place.
// RFC 1184 says client should ignore MODE negotiations with the MODE_ACK bit set, and should not
// generate a response if the negotiated MODE matches the current MODE
if (!((tw->parsedat[2] & L_MODE_ACK) || ((tw->parsedat[2] & L_MODE_MASK) == tw->lmodeBits)))
{
tw->lmodeBits = tw->parsedat[2]; // Accept the mode
tw->parsedat[2] |= L_MODE_ACK; // Set the MODE_ACK bit
sprintf(s,"%c%c%c%c",IAC,TEL_SB,N_LINEMODE,L_MODE);
netwrite(tw->port,s,4);
sprintf(s,"%c%c%c",tw->parsedat[2],IAC,TEL_SE);
netwrite(tw->port,s,3);
#ifdef OPTS_DEBUG
opts_debug_print("SENT: IAC SB");
strcpy(s, "SENT: LM MODE = ");
DemangleLineModeShort(s, tw->parsedat[2]);
opts_debug_print(s);
opts_debug_print("SENT: IAC SE");
#endif
}
#ifdef OPTS_DEBUG
else {
strcpy(s, "LINEMODE MODE = ");
DemangleLineModeShort(s, tw->parsedat[2]);
opts_debug_print(s);
if (tw->parsedat[2] & L_MODE_ACK)
opts_debug_print("\tignored because MODE_ACK was set.");
else
opts_debug_print("\tIgnored because we are already at that mode.");
strcpy(s, "Curr Linemode = ");
DemangleLineModeShort(s, tw->lmodeBits);
opts_debug_print(s);
}
#endif
}
break;
case TEL_DOTEL:
#ifdef OPTS_DEBUG
sprintf(munger,"RECV: SB LINEMODE DO %c", tw->parsedat[2]);
opts_debug_print(munger);
#endif
tw->forwardMask = TRUE;
setForwardMask(tw);
str_lm[3] = TEL_WILLTEL;
str_lm[4] = L_FORWARDMASK;
netpush(tw->port);
netwrite(tw->port, str_lm, sizeof(str_lm));
#ifdef OPTS_DEBUG
sprintf(munger,"SENT: IAC SB LINEMODE WILL %c IAC SE", tw->parsedat[2]);
opts_debug_print(munger);
#endif
break;
case TEL_DONTTEL:
#ifdef OPTS_DEBUG
sprintf(munger,"RECV: SB LINEMODE DO %c", tw->parsedat[2]);
opts_debug_print(munger);
#endif
tw->forwardMask = FALSE;
str_lm[3] = TEL_WONTTEL;
str_lm[4] = L_FORWARDMASK;
netpush(tw->port);
netwrite(tw->port, str_lm, sizeof(str_lm));
#ifdef OPTS_DEBUG
sprintf(munger,"SENT: IAC SB LINEMODE WONT %c IAC SE", tw->parsedat[2]);
opts_debug_print(munger);
#endif
break;
case L_SLC: /* set local chars */
negotiateSLC(tw);
break;
default:
#ifdef OPTS_DEBUG
sprintf(munger, "RECV: SB LINEMODE ?? (?? = %c)", tw->parsedat[1]);
opts_debug_print(munger);
#endif
break;
}//switch parsedat
}
void negotiateSLC(struct WindRec *tw)
{
short lmslcflag = 0;
unsigned char *ourValues = tw->slc;
unsigned char *ourLevels = tw->slcLevel;
short i;
#ifdef OPTS_DEBUG
sprintf(munger,"RECV: IAC SB LINEMODE SLC");
opts_debug_print(munger);
for(i=2;i <= tw->parseIndex - 3; i+=3)
{
if (tw->parsedat[i] > 30) break; // RAB BetterTelnet 2.0b3
// we shouldn't panic on bad data
// if (tw->parsedat[i] > 30)
// DebugStr("\pAck! Bad option number");
if(tw->parsedat[i+1] & SLC_AWK)
sprintf(munger," %s %s|AWK %d",LMoptions[tw->parsedat[i]],LMflags[tw->parsedat[i+1] & SLC_LEVELBITS],tw->parsedat[i+2]);
else
sprintf(munger," %s %s %d",LMoptions[tw->parsedat[i]],LMflags[tw->parsedat[i+1] & SLC_LEVELBITS],tw->parsedat[i+2]);
opts_debug_print(munger);
}
sprintf(munger,"RECV: IAC SE");
opts_debug_print(munger);
#endif
for (i=2, lmslcflag=0; i <= tw->parseIndex - 3; i+=3)
{
short optionNumber = tw->parsedat[i];
Boolean awked = (tw->parsedat[i+1] & SLC_AWK);
unsigned char requestedValue = tw->parsedat[i+2];
unsigned char requestedLevel = tw->parsedat[i+1] & SLC_LEVELBITS;
Boolean flushin = tw->parsedat[i+1] & SLC_FLUSHIN;
Boolean flushout = tw->parsedat[i+1] & SLC_FLUSHOUT;
if ((ourValues[optionNumber] != requestedValue)||(ourLevels[optionNumber] != tw->parsedat[i+1])) //if we are sent what we already have, ignore it
{
if (requestedLevel == SLC_NOSUPPORT)
{
if (ourLevels[optionNumber] & SLC_LEVELBITS != SLC_NOSUPPORT)
{
ourValues[optionNumber] = 255;
ourLevels[optionNumber] = SLC_NOSUPPORT;//ok, we wont support this
if (!awked)
respondSLC(optionNumber,&lmslcflag, tw, TRUE);//awk only if he didnt awk
#ifdef OPTS_DEBUG
else
{
sprintf(munger,"\t %s %s %d accepted; no response sent because it was AWKED",
LMoptions[optionNumber],LMflags[requestedLevel],requestedValue);
opts_debug_print(munger);
}
#endif
}
#ifdef OPTS_DEBUG
else
{
sprintf(munger, "\t %s %s %d Ignored because we are already at nosupport",
LMoptions[optionNumber],LMflags[requestedLevel],ourValues[optionNumber]);
opts_debug_print(munger);
}
#endif
}
else if (requestedLevel == SLC_DEFAULT)
{
ourValues[optionNumber] = default_slc[optionNumber]; //get our default
if (ourValues[optionNumber] == 255)
ourLevels[optionNumber] = SLC_NOSUPPORT;
else
ourLevels[optionNumber] = SLC_VALUE;
respondSLC(optionNumber, &lmslcflag, tw, FALSE); //tell him about our choice
}
else if (requestedLevel > ourLevels[optionNumber])
respondSLC(optionNumber, &lmslcflag, tw, FALSE); //keep lower setting
else
{
ourValues[optionNumber] = requestedValue;
ourLevels[optionNumber] = requestedLevel;
if (flushin)
ourLevels[optionNumber] |= SLC_FLUSHIN;
if (flushout)
ourLevels[optionNumber] |= SLC_FLUSHOUT;
if (!awked)
respondSLC(optionNumber, &lmslcflag, tw, TRUE); //agree to his new setting
}
}
#ifdef OPTS_DEBUG
else
{
sprintf(munger, "\t %s %s Ignored because %d is already the current value",
LMoptions[optionNumber],LMflags[requestedLevel],ourValues[optionNumber]);
opts_debug_print(munger);
}
#endif
}//end for on parseindex
if (lmslcflag)
{
unsigned char toSend[2] = {IAC,TEL_SE};
netpush(tw->port);
netwrite(tw->port,toSend,2);
opts_debug_print("SENT: IAC SE");
}
}
/*
* parse
* Do the telnet negotiation parsing.
*
* look at the string which has just come in from outside and
* check for special sequences that we are interested in.
*
* Tries to pass through routine strings immediately, waiting for special
* characters ESC and IAC to change modes.
*/
void
parse(CONNECTION *con,unsigned char *st,int cnt)
{
static int sub_pos; /* the position we are in the subnegotiation parsing */
static int end_sub; /* index of last byte in parsedat in a subnegotiation */
unsigned char *mark, *orig;
char buf[256];
kstream ks;
ks = con->ks;
#ifdef PRINT_EVERYTHING
hexdump("Options to process:", st, cnt);
#endif /* PRINT_EVERYTHING */
orig = st; /* remember beginning point */
mark = st + cnt; /* set to end of input string */
#ifdef HUH
netpush(tw->pnum);
#endif
/*
* traverse string, looking for any special characters which indicate that
* we need to change modes.
*/
while(st < mark) {
while(con->telstate != STNORM && st < mark) {
switch(con->telstate) {
case IACFOUND: /* telnet option negotiation */
if(*st == IAC) { /* real data=255 */
st++; /* real 255 will get sent */
con->telstate = STNORM;
break;
} /* end if */
if(*st > 239) {
con->telstate = *st++; /* by what the option is */
break;
} /* end if */
#ifdef NEGOTIATEDEBUG
wsprintf(buf, "\r\n strange telnet option");
OutputDebugString(buf);
#endif
orig=++st;
con->telstate=STNORM;
break;
case EL: /* received a telnet erase line command */
case EC: /* received a telnet erase character command */
case AYT: /* received a telnet Are-You-There command */
case AO: /* received a telnet Abort Output command */
case IP: /* received a telnet Interrupt Process command */
case BREAK: /* received a telnet Break command */
case DM: /* received a telnet Data Mark command */
case NOP: /* received a telnet No Operation command */
case SE: /* received a telnet Subnegotiation End command */
case ABORT: /* received a telnet Abort Process command */
case SUSP: /* received a telnet Suspend Process command */
case xEOF: /* received a telnet EOF command */
#ifdef NEGOTIATEDEBUG
wsprintf(buf,"RECV: %s\r\n",
telstates[con->telstate-TELCMD_FIRST]);
OutputDebugString(buf);
#endif
con->telstate=STNORM;
orig=++st;
break;
case GA: /* telnet go ahead option*/
#ifdef NEGOTIATEDEBUG
wsprintf(buf,"RECV: %s\r\n",
telstates[con->telstate-TELCMD_FIRST]);
OutputDebugString(buf);
#endif
con->telstate=STNORM;
orig=++st;
break;
case DO: /* received a telnet DO negotiation */
#ifdef NEGOTIATEDEBUG
wsprintf(buf,"RECV: %s %s\r\n",
telstates[con->telstate-TELCMD_FIRST],teloptions[*st]);
OutputDebugString(buf);
#endif
switch(*st) {
#ifdef NOT
case TELOPT_BINARY: /* DO: binary transmission */
if(!tw->ibinary) { /* binary */
if(!tw->iwantbinary) {
netprintf(tw->pnum,"%c%c%c",
IAC,WILL,BINARY);
if(tw->condebug>0)
tprintf(cv,"SEND: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[BINARY]);
} /* end if */
else
tw->iwantbinary=0; /* turn off this now */
tw->ibinary=1;
} /* end if */
else {
if(tw->condebug>0)
tprintf(cv,"NO REPLY NEEDED: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[BINARY]);
} /* end else */
break;
#endif
case TELOPT_SGA: /* DO: Suppress go-ahead */
if(!con->igoahead) { /* suppress go-ahead */
wsprintf(buf,"%c%c%c",IAC,WILL,TELOPT_SGA);
TelnetSend(ks,buf,lstrlen(buf),0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[TELOPT_SGA]);
OutputDebugString(strTmp);
OutputDebugString("igoahead");
#endif
con->igoahead=1;
} /* end if */
else {
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,
"NO REPLY NEEDED: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[TELOPT_SGA]);
OutputDebugString(strTmp);
#endif
} /* end else */
break;
case TELOPT_TTYPE: /* DO: terminal type negotiation */
if(!con->termsent) {
con->termsent=TRUE;
wsprintf(buf,"%c%c%c",IAC,WILL,TELOPT_TTYPE);
TelnetSend(ks,buf,lstrlen(buf),0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[TELOPT_TTYPE]);
OutputDebugString(strTmp);
#endif
} /* end if */
else {
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"NO REPLY NEEDED: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[TELOPT_TTYPE]);
OutputDebugString(strTmp);
#endif
} /* end else */
break;
#ifdef LATER
case TELOPT_LINEMODE: /* DO: linemode negotiation */
tw->lmflag=1; /* set the linemode flag */
netprintf(tw->pnum,"%c%c%c",IAC,WILL,TELOPT_LINEMODE);
/*
* Tell the other side to send us
* its default character set
*/
netprintf(tw->pnum,"%c%c%c%c",
IAC,SB,TELOPT_LINEMODE,SLC,0,SLC_DEFAULT,0,IAC,SE);
if(tw->condebug>0) {
tprintf(cv,"SEND: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[TELOPT_LINEMODE]);
tprintf(cv,
"SEND: SB LINEMODE SLC 0 SLC_DEFAULT 0 IAC SE\r\n");
} /* end if */
break;
#endif
case TELOPT_NAWS: /* DO: Negotiate About Window Size */
con->bResizeable=TRUE;
send_naws(con);
break;
case TELOPT_AUTHENTICATION: /* DO: Authentication requested */
wsprintf(buf, "%c%c%c", IAC, WILL, TELOPT_AUTHENTICATION);
TelnetSend(ks, buf, lstrlen(buf), 0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[WILL - TELCMD_FIRST],
teloptions[TELOPT_AUTHENTICATION]);
OutputDebugString(strTmp);
#endif
break;
#ifdef ENCRYPTION
case TELOPT_ENCRYPT: /* DO: Remote is willing to receive encrypted */
wsprintf(buf, "%c%c%c", IAC,
(encrypt_flag ? WILL : WONT), TELOPT_ENCRYPT);
TelnetSend(ks, buf, lstrlen(buf), 0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[(encrypt_flag ? WILL : WONT)
- TELCMD_FIRST],
teloptions[TELOPT_ENCRYPT]);
OutputDebugString(strTmp);
#endif
break;
#endif /* ENCRYPTION */
default: /* DO: */
wsprintf(buf, "%c%c%c", IAC, WONT, *st);
TelnetSend(ks, buf, lstrlen(buf), 0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[WONT - TELCMD_FIRST], teloptions[*st]);
OutputDebugString(strTmp);
#endif
break;
} /* end switch */
con->telstate = STNORM;
orig = ++st;
break;
case DONT: /* Received a telnet DONT option */
switch (*st) {
case TELOPT_NAWS:
con->bResizeable=FALSE;
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"RECV: %s %s\r\n",
telstates[con->telstate-TELCMD_FIRST],teloptions[*st]);
OutputDebugString(strTmp);
#endif
break;
#ifdef NOT
case BINARY: /* DONT: check for binary neg. */
if(tw->ibinary) { /* binary */
if(!tw->iwantbinary) {
netprintf(tw->pnum,"%c%c%c",IAC,WONT,BINARY);
if(tw->condebug>0)
tprintf(cv,"SEND: %s %s\r\n",
telstates[WONT-TELCMD_FIRST],
teloptions[BINARY]);
} /* end if */
else
tw->iwantbinary=0; /* turn off this now */
tw->ibinary=0;
tw->mapoutput=0; /* turn output mapping off */
} /* end if */
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"NO REPLY NEEDED: %s %s\r\n",
telstates[WONT-TELCMD_FIRST],
teloptions[BINARY]);
OutputDebugString(strTmp);
#endif
break;
#endif
#ifdef ENCRYPTION
case ENCRYPTION:
break;
#endif
}
/* all these just fall through to here... */
con->telstate=STNORM;
orig=++st;
break;
case WILL: /* received a telnet WILL option */
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"RECV: %s %s\r\n",
telstates[con->telstate-TELCMD_FIRST],
teloptions[*st]);
OutputDebugString(strTmp);
#endif
switch(*st) {
#ifdef NOT
case TELOPT_BINARY: /* WILL: binary */
if(!tw->ubinary) { /* binary */
if(!tw->uwantbinary) {
netprintf(tw->pnum,"%c%c%c",
IAC,DO,TELOPT_BINARY);
if(tw->condebug>0)
tprintf(cv,"SEND: %s %s\r\n",
telstates[DO - TELCMD_FIRST],
teloptions[TELOPT_BINARY]);
} /* end if */
else
tw->uwantbinary=0; /* turn off this now */
tw->ubinary=1;
} /* end if */
else {
if(tw->condebug>0)
tprintf(cv,"NO REPLY NEEDED: %s %s\r\n",
telstates[DO - TELCMD_FIRST],
teloptions[TELOPT_BINARY]);
} /* end else */
break;
#endif
case TELOPT_SGA: /* WILL: suppress go-ahead */
if(!con->ugoahead) {
con->ugoahead=1;
wsprintf(buf,"%c%c%c",IAC,DO,TELOPT_SGA); /* ack */
TelnetSend(ks,buf,lstrlen(buf),0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[DO - TELCMD_FIRST],
teloptions[TELOPT_SGA]);
OutputDebugString(strTmp);
#endif
} /* end if */
break;
case TELOPT_ECHO: /* WILL: echo */
if(!con->echo) {
con->echo = 1;
wsprintf(buf, "%c%c%c", IAC, DO, TELOPT_ECHO); /* ack */
TelnetSend(ks, buf, lstrlen(buf), 0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[DO - TELCMD_FIRST],
teloptions[TELOPT_ECHO]);
OutputDebugString(strTmp);
#endif
} /* end if */
break;
case TELOPT_TM: /* WILL: Timing mark */
con->timing=0;
break;
#ifdef ENCRYPTION
case TELOPT_ENCRYPT: /* WILL: decrypt our input */
wsprintf(buf, "%c%c%c", IAC,
(encrypt_flag ? DO : DONT), TELOPT_ENCRYPT);
TelnetSend(ks, buf, lstrlen(buf), 0);
if (encrypt_flag)
encrypt_send_support();
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[(encrypt_flag ? DO : DONT) - TELCMD_FIRST],
teloptions[TELOPT_ENCRYPT]);
OutputDebugString(strTmp);
#endif
break;
#endif
default:
wsprintf(buf,"%c%c%c",IAC,DONT,*st);
TelnetSend(ks,buf,lstrlen(buf),0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[DONT-TELCMD_FIRST],teloptions[*st]);
OutputDebugString(strTmp);
#endif
break;
} /* end switch */
con->telstate=STNORM;
orig=++st;
break;
case WONT: /* Received a telnet WONT option */
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"RECV: %s %s\r\n",
telstates[con->telstate-TELCMD_FIRST],teloptions[*st]);
OutputDebugString((LPSTR)strTmp);
#endif
con->telstate=STNORM;
switch(*st++) { /* which option? */
#ifdef NOT
case BINARY: /* WONT: binary */
if(tw->ubinary) { /* binary */
if(!tw->uwantbinary) {
netprintf(tw->pnum,"%c%c%c",
IAC,DONT,BINARY);
if(tw->condebug>0)
tprintf(cv,"SEND: %s %s\r\n",
telstates[DONT-TELCMD_FIRST],
teloptions[BINARY]);
} /* end if */
else
tw->uwantbinary=0; /* turn off this now */
tw->ubinary=0;
tw->mapoutput=0; /* turn output mapping off */
} /* end if */
else {
if(tw->condebug>0)
tprintf(cv,"NO REPLY NEEDED: %s %s\r\n",
telstates[DONT-TELCMD_FIRST],
teloptions[BINARY]);
} /* end else */
break;
#endif
case TELOPT_ECHO: /* WONT: echo */
if(con->echo) {
con->echo=0;
wsprintf(buf,"%c%c%c",IAC,DONT,TELOPT_ECHO);
TelnetSend(ks,buf,lstrlen(buf),0);
#ifdef NEGOTIATEDEBUG
wsprintf(strTmp,"SEND: %s %s\r\n",
telstates[DONT-TELCMD_FIRST],
teloptions[TELOPT_ECHO]);
OutputDebugString(strTmp);
OutputDebugString("Other side won't echo!");
#endif
} /* end if */
break;
case TELOPT_TM: /* WONT: Telnet timing mark option */
con->timing=0;
break;
#ifdef ENCRYPTION
case TELOPT_ENCRYPT: /* WONT: don't encrypt our input */
break;
#endif
default:
break;
} /* end switch */
orig=st;
break;
case SB: /* telnet sub-options negotiation */
con->telstate=NEGOTIATE;
orig=st;
end_sub=0;
sub_pos=con->substate=0; /* Defined for each */
#ifdef OLD_WAY
break;
#endif
case NEGOTIATE:
/* until we change sub-negotiation states, accumulate bytes */
if(con->substate==0) {
if(*st==IAC) { /* check if we found an IAC byte */
if(*(st+1)==IAC) { /* skip over double IAC's */
st++;
parsedat[sub_pos++]=*st++;
} /* end if */
else {
end_sub=sub_pos;
con->substate=*st++;
} /* end else */
} /* end if */
else /* otherwise, just stash the byte */
parsedat[sub_pos++]=*st++;
} /* end if */
else {
con->substate=*st++;
/* check if we've really ended the sub-negotiations */
if(con->substate==SE)
parse_subnegotiat(ks,end_sub);
orig=st;
/*
* XXX hack to decrypt the rest of the buffer
*/
if (encrypt_flag == 2) {
decrypt_ks_hack(orig, mark - orig);
encrypt_flag = 1;
}
con->telstate=STNORM;
} /* end else */
break;
default:
con->telstate=STNORM;
break;
} /* end switch */
} /* end while */
/*
* quick scan of the remaining string, skip chars while they are
* uninteresting
*/
if(con->telstate==STNORM && st<mark) {
/*
* skip along as fast as possible until an interesting character is found
*/
while(st<mark && *st!=27 && *st!=IAC) {
#if 0
if(!tw->ubinary)
*st&=127; /* mask off high bit */
#endif
st++;
} /* end while */
#if 0
if(!tw->timing)
parsewrite(tw,orig,st-orig);
#endif
orig=st; /* forget what we have sent already */
if(st<mark)
switch(*st) {
case IAC: /* telnet IAC */
con->telstate=IACFOUND;
st++;
break;
default:
#ifdef NEGOTIATEDEBUG
wsprintf(buf," strange char>128 0x%x\r\n", *st);
OutputDebugString(buf);
#endif
st++;
break;
} /* end switch */
} /* end if */
} /* end while */
} /* end parse() */