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    Length: 7382 (0x1cd6)
    Types: TextFile
    Notes: UNIX file
    Names: »llc.h«

└─⟦8c4f54e61⟧ Bits:30004068/disk2.imd Interactive TCP/IP v.1.2
└─⟦8c4f54e61⟧ UNIX Filesystem
    └─⟦this⟧ »hb/new/usr/include/sys/llc.h« 

TextFile

/*
 *	LLC datalink protocol driver data.
 *
 *	This header is meant to be used by streams datalink level
 *	drivers such as ethernet drivers.
 *
 *	Copyrighted as an unpublished work.
 *	(c) Copyright 1988 INTERACTIVE Systems Corporation
 *	All rights reserved.
 *
 *	RESTRICTED RIGHTS:
 *
 *	These programs are supplied under a license.  They may be used,
 *	disclosed, and/or copied only as permitted under such license
 *	agreement.  Any copy must contain the above copyright notice and
 *	this restricted rights notice.  Use, copying, and/or disclosure
 *	of the programs is strictly prohibited unless otherwise provided
 *	in the license agreement.
 */

#ident "@(#)llc.h	1.8 - 89/09/29"

#define LLC_UI		0x03	/* unnumbered information field */
#define LLC_XID		0xAF	/* XID with P == 0 */
#define LLC_TEST	0xE3	/* TEST with P == 0 */

#define LLC_P		0x10	/* P bit for use with XID/TEST */
#define LLC_XID_FMTID	0x81	/* XID format identifier */
#define LLC_SERVICES	0x01	/* Services supported */
#define LLC_GLOBAL_SAP	0XFF	/* Global SAP address */
#define LLC_GROUP_ADDR	0x01	/* indication in DSAP of a group address */
#define LLC_RESPONSE	0x01	/* indication in SSAP of a response */
#define LLC_SNAP_SAP	0xAA	/* lsap for SNAP addressing */

#define LLC_XID_INFO_SIZE	3 /* length of the INFO field */


/*
 *	recoverable error conditions
 */

#define LLCE_OK		0	/* normal condition */
#define LLCE_NOBUFFER	1	/* couldn't allocb */
#define LLCE_INVALID	2	/* operation isn't valid at this time */
#define LLCE_BOUND	3	/* stream is already bound */
#define LLCE_BLOCKED	4	/* blocked at next queue */

/*
 *	debug bits
 */

# define LLCTRACE	0x01
# define LLCRECV	0x02
# define LLCSEND	0x04
# define LLCPROT	0x08
# define LLCERRS	0x10

#ifdef DEBUG
#define LLCDEBUG
#endif

/*
 *	The llcdev structure contains pointers to the device specific routines
 *	referenced by the general llc routines.  This structure should be
 *	a model for all q_qptr structures using the llc routines.
 */
struct llcdev {
    queue_t	*llc_qptr;	/* points to queue assoc with open device */
    int		(*llc_reset)();	/* reset procedure */
    int		(*llc_saddr)();	/* set physical address */
    int		(*llc_send)();	/* transmit procedure */
    int		(*llc_prom)();	/* set promiscuous mode */
    int		(*llc_gstat)();	/* get board statistics */
    int		(*llc_dioctl)();/* Driver specific ioctls */
    struct llcparam *llc_macpar;/* board specific parameters */
    struct llcstats *llc_stats; /* driver and board statistics */
    u_short	llc_state;	/* state variable for DL_INFO */
    u_short	llc_flags;	/* flags to indicate driver status */
    u_short	llc_type;	/* LLC or Ether */
    u_short	llc_sap;	/* sap or ethertype depending on llc_type */
    u_short	llc_no;		/* index number from front of array */
    u_short	llc_mask;	/* mask for ether type or LLC SAPs */
    u_short	llc_snap[3];	/* for SNAP and other extensions */
    u_short	llc_rws;	/* receive window size - for LLC2 */
    u_short	llc_sws;	/* send window size - for LLC2 */
    u_short	llc_rseq;	/* receive sequence number - for LLC2 */
    u_short	llc_sseq;	/* send sequence number - for LLC2 */
    
};

/* driver status bits */
#define LLC_OPEN	0x01	/* minor device is opened */
#define LLC_PROM	0x02	/* promiscuous mode enabled */
#define LLC_XWAIT	0x04	/* waiting to be rescheduled */
#define LLC_SU		0x80	/* opened by priviledged user */
#define LLC_RWAIT	0x100	/* waiting for read reschedule */


/* define llc class 1 and mac structures and macros */

struct llctype {
   u_short	llc_length;	/* header length */
   u_char	llc_dsap;	/* destination sap */
   u_char	llc_ssap;	/* source sap */
   u_char	llc_control;	/* control information */
   u_char	llc_org[3];	/* SNAP organization/protocol */
   u_char	llc_type[2];	/* SNAP type */
   u_char	llc_info[1];	/* data */
};

struct ethertype {
   u_short ether_type;
   u_char ether_data[1];
};

struct llc_machdr {
   u_char mac_dst[6];
   u_char mac_src[6];
   union {
      struct ethertype ether;
      struct llctype llc;
   } mac_llc;
};

typedef struct llc_machdr machdr_t;

#define LLC_SAP_LEN	1	/* length of sap only field */
#define LLC_LSAP_LEN	2	/* length of sap/type field  */
#define LLC_TYPE_LEN    2	/* ethernet type field length */
#define LLC_ADDR_LEN	6	/* length of 802.3/ethernet address */
#define LLC_LSAP_HDR_SIZE 3
#define LLC_SNAP_SIZE	5
#define LLC_HDR_SIZE	((2*LLC_ADDR_LEN)+LLC_LSAP_HDR_SIZE+LLC_LSAP_LEN)
#define LLC_EHDR_SIZE	((2*LLC_ADDR_LEN)+LLC_TYPE_LEN)

#define LLC_LIADDR_LEN	(LLC_ADDR_LEN+LLC_SAP_LEN)
#define LLC_ENADDR_LEN	(LLC_ADDR_LEN+LLC_TYPE_LEN)

union llc_bind_fmt {
   struct llca {
      unsigned char  lbf_addr[LLC_ADDR_LEN];
      unsigned short lbf_sap;
   } llca;
   struct llcb {
      unsigned char  lbf_addr[LLC_ADDR_LEN];
      unsigned short lbf_sap;
      unsigned long  lbf_xsap;
      unsigned long  lbf_type;
   } llcb;
   struct llcc {
      unsigned char lbf_addr[LLC_ADDR_LEN];
      unsigned char lbf_sap;
   } llcc;
};

#define LLC_LENGTH(m)	ntohs(((struct llc_machdr *)m)->mac_llc.llc.llc_length)
#define LLC_DSAP(m)	(((struct llc_machdr *)m)->mac_llc.llc.llc_dsap)
#define LLC_SSAP(m)	(((struct llc_machdr *)m)->mac_llc.llc.llc_ssap)
#define LLC_CONTROL(m)	(((struct llc_machdr *)m)->mac_llc.llc.llc_control)
#define LLC_SNAP(m)	(((struct llc_machdr *)m)->mac_llc.llc.llc_org)

#define ETHER_TYPE(m)  ntohs(((struct llc_machdr *)m)->mac_llc.ether.ether_type)

#define LLCMAXSAPVALUE	0xFF	/* largest LSAP value */
#define LLCSLIPSAPVALUE	0x888	/* SAP for SLIP */

/* other useful macros */

#define HIGH(x) ((x>>8)&0xFF)
#define LOW(x)	(x&0xFF)

/*
 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
 * by an ETHER type (as given above) and then the (variable-length) header.
 */
#define	ETHERTYPE_TRAIL		0x1000		/* Trailer packet */
#define	ETHERTYPE_NTRAILER	16

/*
 *	board dependent parameters
 */
struct llcparam {
    short	llcp_index;	/* board index */
    short	llcp_int;	/* interrupt level */
    short	llcp_port;	/* I/O port address */
    short	llcp_portsize;	/* port address range */
    long	llcp_base;	/* address of board's memory */
    long	llcp_memsize;	/* size of on-board memory */
    caddr_t	llcp_memp;	/* pointer to mapped version */
    int		llcp_running;	/* initialization status */
    int		llcp_state;	/* board state */
    short	llcp_major;	/* major device number */
    short	llcp_minors;	/* number of minor devices allocated */
    short	llcp_maxpkt;	/* maximum packet size */
    short	llcp_maxpktllc;	/* maximum packet size - LLC1 */
    long	llcp_nextq;	/* next queue to be scheduled */
    long	llcp_ncount;	/* count of bufcalls */
    long	llcp_proms;	/* number of promiscuous streams */
    long	llcp_devmode;	/* promiscuous mode */
    short	llcp_firstd;	/* first minor device for this major */
    unchar	llcp_macaddr[LLC_ADDR_LEN];
};

/*
 *	statistics on drivers and boards; this structure is pointed to
 *	by the llcdev structure and must be defined at the front of the
 *	driver statistics structures.
 */
struct llcstats {
    ulong	llcs_nstats;	/* number of stat fields */
    /* non-hardware */
    ulong	llcs_nobuffer;	/* 0 */
    ulong	llcs_blocked;	/* 1 */
    ulong	llcs_blocked2;	/* 2 */
    ulong	llcs_multicast;	/* 3 */
    /* rest are hardware dependent; see individual drivers */
};