#include <stdio.h>
#include <stdarg.h>
#include <ttyio.h>

#define	ERROR	(-1)
#define	DLE	0x10
#define	TIMEOUT	30

/*
 * get a non-protocolled message from the other side
 */
imsg(buf)
register char *buf;
{
    extern int Debug;

    char *first;
    register c;

    while (1) {
	c = receive(TIMEOUT);
	if (c == ERROR)
	    return EOF;
	else if ((c &= 0x7f) == DLE)
	    break;
	else if (Debug > 4)
	    putc(c, stderr);
    }
    first = buf;

    while ((c=receive(TIMEOUT)) != ERROR) {
	if ((c &= 0x7f) == DLE)
	    buf = first;
	else if ((*buf++ = c) == '\n' || c == '\0') {
	    *buf = 0;
	    return 0;
	}
    }
    return ERROR;
} /* imsg */


/*
 * write a non-protocoled msg to the other machine.
 */
void
omsg(msg)
char *msg;
{
    va_list ptr;
    char pkt[128];

    ttyout(DLE);
    va_start(ptr, msg);
    vsprintf(pkt, msg, ptr);
    va_end(ptr);
    ttywrite(pkt, strlen(pkt));
    ttywrite("\000\n", 2);
} /* omsg */