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Code Issues Releases Wiki Activity

Re-add Kermit telnet negotiation, but leave it disabled

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This commit is contained in:
Jim
2011-08-27 20:35:12 -04:00
parent cc4d7561ed
commit 4e59c7728b
1 changed files with 87 additions and 28 deletions
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115
devamlc.h
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@@ -139,6 +139,22 @@ int devamlc (int class, int func, int device) {
#define TS_SUBOPT 2 /* inside a suboption */
#define TS_OPTION 3 /* inside an option */
/* telnet protocol special characters */
#define TN_IAC 255
#define TN_WILL 251
#define TN_WONT 252
#define TN_DO 253
#define TN_DONT 254
/* telnet options */
#define TN_BINARY 0
#define TN_ECHO 1
#define TN_SGA 3 /* means this is a full-duplex connection */
#define TN_KERMIT 47
#define TN_SUBOPT 250
static short inited = 0;
static int pollspeedup = 1;
static int baudtable[16] = {1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200};
@@ -191,7 +207,7 @@ int devamlc (int class, int func, int device) {
fd_set fds;
struct timeval timeout;
unsigned char ch;
int state;
int tstate, toper;
int msgfd;
int allbusy;
unsigned short qtop, qbot, qtemp;
@@ -805,15 +821,15 @@ endconnect:
methods, this stuff might be better off in a very thin
connection server */
buf[0] = 255; /* IAC */
buf[1] = 251; /* will */
buf[2] = 1; /* echo */
buf[3] = 255; /* IAC */
buf[4] = 251; /* will */
buf[5] = 3; /* supress go ahead */
buf[6] = 255; /* IAC */
buf[7] = 253; /* do */
buf[8] = 0; /* binary mode */
buf[0] = TN_IAC;
buf[1] = TN_WILL;
buf[2] = TN_ECHO;
buf[3] = TN_IAC;
buf[4] = TN_WILL;
buf[5] = TN_SGA;
buf[6] = TN_IAC;
buf[7] = TN_DO;
buf[8] = TN_BINARY;
write(fd, buf, 9);
/* send out the ttymsg greeting */
@@ -1031,13 +1047,13 @@ endconnect:
if (n > 0) {
//printf("devamlc: RECV dx=%d, lx=%d, b=%d, tried=%d, read=%d\n", dx, lx, dc[dx].bufnum, n2, n);
state = dc[dx].tstate[lx];
tstate = dc[dx].tstate[lx];
for (i=0; i<n; i++) {
ch = buf[i];
switch (state) {
switch (tstate) {
case TS_DATA:
if (ch == 255 && (dc[dx].ctype[lx] == CT_SOCKET || dc[dx].ctype[lx] == CT_DEDIP))
state = TS_IAC;
if (ch == TN_IAC && (dc[dx].ctype[lx] == CT_SOCKET || dc[dx].ctype[lx] == CT_DEDIP))
tstate = TS_IAC;
else {
storech:
utempa = lx<<12 | 0x0200 | ch;
@@ -1049,32 +1065,75 @@ endconnect:
break;
case TS_IAC:
switch (ch) {
case 255:
state = TS_DATA;
case TN_IAC:
tstate = TS_DATA;
goto storech;
case 251: /* will */
case 252: /* won't */
case 253: /* do */
case 254: /* don't */
state = TS_OPTION;
case TN_WILL:
case TN_WONT:
case TN_DO:
case TN_DONT:
//printf("\nReceived command %d\n", ch);
tstate = TS_OPTION;
toper = ch;
break;
case 250: /* begin suboption */
state = TS_SUBOPT;
case TN_SUBOPT:
//printf("\nReceived SUBOPT command\n");
tstate = TS_SUBOPT;
break;
default: /* ignore other chars after IAC */
state = TS_DATA;
//printf("\nReceived unknown IAC command %d\n", ch);
tstate = TS_DATA;
}
break;
case TS_SUBOPT:
if (ch == 255)
state = TS_IAC;
//printf("\nsubopt received %d\n", ch);
if (ch == TN_IAC)
tstate = TS_IAC;
break;
case TS_OPTION:
#if 0
//printf("\nReceived option %d\n", ch);
if (toper == TN_WILL) {
if (ch == TN_SGA || ch == TN_BINARY)
;
else if (ch == TN_KERMIT) {
buf[0] = TN_IAC;
buf[1] = TN_DO;
buf[2] = ch;
//printf("Sending DO %d\n", ch);
write(fd, buf, 3);
} else {
buf[0] = TN_IAC;
buf[1] = TN_DONT;
buf[2] = ch;
//printf("Sending DONT %d\n", ch);
write(fd, buf, 3);
}
} else if (toper == TN_DO) {
if (toper == TN_ECHO)
;
else if (0 && ch == TN_KERMIT) {
buf[0] = TN_IAC;
buf[1] = TN_WILL;
buf[2] = ch;
//printf("Sending WILL %d\n", ch);
write(fd, buf, 3);
} else {
buf[0] = TN_IAC;
buf[1] = TN_WONT;
buf[2] = ch;
//printf("Sending WONT %d\n", ch);
write(fd, buf, 3);
}
}
tstate = TS_DATA;
break;
#endif
default:
state = TS_DATA;
tstate = TS_DATA;
}
}
dc[dx].tstate[lx] = state;
dc[dx].tstate[lx] = tstate;
}
}
lx = (lx+1) & 0xF;