while ((argtype = va_arg(ap1, int)) != PKT_END) {
	switch (argtype) {
	  case PKT_INT:
	    (void) va_arg(ap1, int);
	    pktlen += 4;
	    break;
	  case PKT_CHAR:
	    (void) va_arg(ap1, char);
	    (void) va_arg(ap1, int);
	    pktlen++;
	    break;
	  case PKT_DATA:
	    (void) va_arg(ap1, unsigned char *);
	    arglen = va_arg(ap1, int);
	    pktlen += arglen;
	    break;

	switch (argtype) {
	  case PKT_INT:
	    argint = va_arg(ap2, int);
	    PUT_32BIT(p, argint);
	    p += 4;
	    break;
	  case PKT_CHAR:
	    argchar = va_arg(ap2, unsigned char);
	    argchar = (unsigned char) va_arg(ap2, int);
	    *p = argchar;
	    p++;
	    break;
	  case PKT_DATA:
	    argp = va_arg(ap2, unsigned char *);
	    arglen = va_arg(ap2, int);
	    memcpy(p, argp, arglen);