//union ip2breadcrumb {	struct { 		unsigned char port, cat, codes, label;	} __attribute__ ((packed)) hdr;	unsigned long value;};#define ITRC_NO_PORT 	0xFF#define CHANN	(pCh->port_index)#define	ITRC_ERROR	'!'#define	ITRC_INIT 	'A'#define	ITRC_OPEN	'B'#define	ITRC_CLOSE	'C'#define	ITRC_DRAIN	'D'#define	ITRC_IOCTL	'E'#define	ITRC_FLUSH	'F'#define	ITRC_STATUS	'G'#define	ITRC_HANGUP	'H'#define	ITRC_INTR 	'I'#define	ITRC_SFLOW	'J'#define	ITRC_SBCMD	'K'#define	ITRC_SICMD	'L'#define	ITRC_MODEM	'M'#define	ITRC_INPUT	'N'#define	ITRC_OUTPUT	'O'#define	ITRC_PUTC	'P'#define	ITRC_QUEUE	'Q'#define	ITRC_STFLW	'R'#define	ITRC_SFIFO	'S'#define	ITRC_VERIFY	'V'#define	ITRC_WRITE	'W'#define	ITRC_ENTER	0x00#define	ITRC_RETURN	0xFF#define	ITRC_QUEUE_ROOM	2#define	ITRC_QUEUE_CMD	6