/* * Control messages (regular priority) */#define	M_DATA	0		/* regular data (not ctl) */#define	M_BREAK	01		/* line break */#define	M_HANGUP 02		/* line disconnect */#define	M_DELIM	03		/* data delimiter */#define	M_ECHO	04		/* request ACK (1 param) */#define	M_ACK	05		/* response to ECHO (1 param) */#define	M_IOCTL	06		/* ioctl; set/get params */#define	M_DELAY 07		/* real-time xmit delay (1 param) */#define	M_CTL	010		/* device-specific control message */#define	M_PASS	011		/* pass file */#define	M_YDEL	012		/* stream has started generating delims */#define	M_NDEL	013		/* stream has stopped generating delims */ /* * Control messages (high priority; go to head of queue) */#define	M_SIGNAL 0101		/* generate process signal */#define	M_FLUSH	0102		/* flush your queues */#define	M_STOP	0103		/* stop transmission immediately */#define	M_START	0104		/* restart transmission after stop */#define	M_IOCACK 0105		/* acknowledge ioctl */#define	M_IOCNAK 0106		/* negative ioctl acknowledge */#define	M_CLOSE	0107		/* channel closes (dk only) */#define	M_IOCWAIT 0110		/* stop ioctl timeout, ack/nak follows later */ /* * ioctl message packet */ #define	STIOCSIZE	16#define	STIOCHDR	4 struct stioctl {	unsigned char com[STIOCHDR];	/* four-byte command, low order byte first */	char data[STIOCSIZE];	/* depends on command */}; /* * header for messages, see mesg.c */#define MSLEN 2struct mesg {	char		type;	unsigned char	magic;	unsigned char	size[MSLEN];	/* 2 byte size, low order first */}; #define	MSGMAGIC	0345#define	MSGHLEN	4	/* true length of struct mesg in bytes */ /* * magic numbers of line disciplines */ #define	tty_ld		0	/* tty processing */#define	cdkp_ld		1	/* URP protocol -- character mode (same as 1) */#define	rdk_ld		2	/* raw datakit protocol */#define	pk_ld		3	/* packet driver */#define	mesg_ld		4	/* data message protocol */#define	dkp_ld		5	/* URP protocol -- block mode */#define	ntty_ld		6	/* new tty processing */#define	buf_ld		7	/* buffer up characters till timeout */#define	trc_ld		8	/* stream tracer */#define	rmesg_ld	9	/* reverse message processing */#define	ip_ld		10	/* IP - push on net interfaces (il, ec, ...) */#define	tcp_ld		11	/* TCP (inet) - only one instance, on /dev/ip6 */#define	chroute_ld	12	/* Chaosnet - push on net interfaces (il, ec, ...) */#define	arp_ld		13	/* Ethernet address resolution - on net interfaces */#define	udp_ld		14	/* UDP (inet) - only one instance, on /dev/ip */#define	chaos_ld	15	/* Chaosnet - only one, above any chroute_ld */#define	filter_ld	16	/* Delimiter filtering */#define	dump_ld		17	/* Debug dumper */#define	conn_ld		18	/* Connection line discipline */#define	uxp_ld		19	/* unix common control protocol */