ip_mroute.h

vxworks 6.x 的全部头文件

 * The first packet after the end of the interval resets the
 * count and restarts the measurement.
 *
 * For <= measurement:
 * We start a timer to fire at the end of the interval, and
 * then for each incoming packet we count packets and bytes.
 * When the timer fires, we compare the value with the threshold,
 * schedule an upcall if we are below, and restart the measurement
 * (reschedule timer and zero counters).
 */


struct bw_data {
	struct timeval	b_time;
	uint64_t	b_packets;
	uint64_t	b_bytes;
};

struct bw_upcall {
	struct in_addr	bu_src;			/* source address            */
	struct in_addr	bu_dst;			/* destination address       */
	uint32_t	bu_flags;		/* misc flags (see below)    */
#define BW_UPCALL_UNIT_PACKETS   (1 << 0)	/* threshold (in packets)    */
#define BW_UPCALL_UNIT_BYTES     (1 << 1)	/* threshold (in bytes)      */
#define BW_UPCALL_GEQ            (1 << 2)	/* upcall if bw >= threshold */
#define BW_UPCALL_LEQ            (1 << 3)	/* upcall if bw <= threshold */
#define BW_UPCALL_DELETE_ALL     (1 << 4)	/* delete all upcalls for s,d*/
	struct bw_data	bu_threshold;		/* the bw threshold	     */
	struct bw_data	bu_measured;		/* the measured bw	     */
};

/* max. number of upcalls to deliver together */
#define BW_UPCALLS_MAX				128
/* min. threshold time interval for bandwidth measurement */
#define BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC	3
#define BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC	0

/*
 * Pending timeouts are stored in a hash table, the key being the
 * expiration time. Periodically, the entries are analysed and processed.
 */
#define BW_METER_BUCKETS	1024
#define BW_METER_PERIOD (hz)		/* periodical handling of bw meters */
#define BW_UPCALLS_PERIOD (hz)		/* periodical flush of bw upcalls */
   
/*
 * The kernel's multicast routing statistics.
 */
struct mrtstat {
    u_long	mrts_mfc_lookups;	/* # forw. cache hash table hits   */
    u_long	mrts_mfc_misses;	/* # forw. cache hash table misses */
    u_long	mrts_upcalls;		/* # calls to mrouted              */
    u_long	mrts_no_route;		/* no route for packet's origin    */
    u_long	mrts_bad_tunnel;	/* malformed tunnel options        */
    u_long	mrts_cant_tunnel;	/* no room for tunnel options      */
    u_long	mrts_wrong_if;		/* arrived on wrong interface	   */
    u_long	mrts_upq_ovflw;		/* upcall Q overflow		   */
    u_long	mrts_cache_cleanups;	/* # entries with no upcalls 	   */
    u_long  	mrts_drop_sel;     	/* pkts dropped selectively        */
    u_long  	mrts_q_overflow;    	/* pkts dropped - Q overflow       */
    u_long  	mrts_pkt2large;     	/* pkts dropped - size > BKT SIZE  */
    u_long	mrts_upq_sockfull;	/* upcalls dropped - socket full */
};

/*
 * Argument structure used by mrouted to get src-grp pkt counts
 */
struct sioc_sg_req {
    struct in_addr src;
    struct in_addr grp;
    u_long pktcnt;
    u_long bytecnt;
    u_long wrong_if;
};

/*
 * Argument structure used by mrouted to get vif pkt counts
 */
struct sioc_vif_req {
    vifi_t vifi;		/* vif number				*/
    u_long icount;		/* Input packet count on vif		*/
    u_long ocount;		/* Output packet count on vif		*/
    u_long ibytes;		/* Input byte count on vif		*/
    u_long obytes;		/* Output byte count on vif		*/
};
    

/*
 * The kernel's virtual-interface structure.
 */
struct vif {
    u_char   		v_flags;     	/* VIFF_ flags defined above         */
    u_char   		v_threshold;	/* min ttl required to forward on vif*/
    u_int      		v_rate_limit; 	/* max rate			     */
    struct tbf 	       *v_tbf;       	/* token bucket structure at intf.   */
    struct in_addr 	v_lcl_addr;   	/* local interface address           */
    struct in_addr 	v_rmt_addr;   	/* remote address (tunnels only)     */
    struct ifnet       *v_ifp;	     	/* pointer to interface              */
    u_long		v_pkt_in;	/* # pkts in on interface            */
    u_long		v_pkt_out;	/* # pkts out on interface           */
    u_long		v_bytes_in;	/* # bytes in on interface	     */
    u_long		v_bytes_out;	/* # bytes out on interface	     */
    struct route	v_route;	/* cached route if this is a tunnel */
    /*
     * Removed v_rsvp_on/v_rsvpd  as we support RSVP through the
     * IP_ROUTER_ALERT option
     */
};

/*
 * The kernel's multicast forwarding cache entry structure 
 * (A field for the type of service (mfc_tos) is to be added 
 * at a future point)
 */
struct mfc {
	struct in_addr	mfc_origin;		/* IP origin of mcasts	     */
	struct in_addr  mfc_mcastgrp;  		/* multicast group associated*/
	vifi_t		mfc_parent; 		/* incoming vif              */
	u_char		mfc_ttls[MAXVIFS]; 	/* forwarding ttls on vifs   */
	u_long		mfc_pkt_cnt;		/* pkt count for src-grp     */
	u_long		mfc_byte_cnt;		/* byte count for src-grp    */
	u_long		mfc_wrong_if;		/* wrong if for src-grp	     */
	int		mfc_expire;		/* time to clean entry up    */
	struct timeval	mfc_last_assert;	/* last time I sent an assert*/
	struct rtdetq	*mfc_stall;		/* q of packets awaiting mfc */
	struct mfc	*mfc_next;		/* next mfc entry            */
	uint8_t		mfc_flags[MAXVIFS];	/* the MRT_MFC_FLAGS_* flags */
	struct in_addr	mfc_rp;			/* the RP address	     */
	struct bw_meter	*mfc_bw_meter;		/* list of bandwidth meters  */
};

/*
 * Struct used to communicate from kernel to multicast router
 * note the convenient similarity to an IP packet
 */
struct igmpmsg {
    u_long	    unused1;
    u_long	    unused2;
    u_char	    im_msgtype;			/* what type of message	    */
#define IGMPMSG_NOCACHE		1	/* no MFC in the kernel		    */
#define IGMPMSG_WRONGVIF	2	/* packet came from wrong interface */
#define	IGMPMSG_WHOLEPKT	3	/* PIM pkt for user level encap.    */
#define	IGMPMSG_BW_UPCALL	4	/* BW monitoring upcall		    */
    u_char	    im_mbz;			/* must be zero		    */
    u_char	    im_vif;			/* vif rec'd on		    */
    u_char	    unused3;
    struct in_addr  im_src, im_dst;
};

/*
 * Argument structure used for pkt info. while upcall is made
 */
struct rtdetq {
    struct mbuf 	*m;		/* A copy of the packet		    */
    struct ifnet	*ifp;		/* Interface pkt came in on	    */
    vifi_t		xmt_vif;	/* Saved copy of imo_multicast_vif  */
    struct rtdetq	*next;		/* Next in list of packets          */
};

#define MFCTBLSIZ	256
#if (MFCTBLSIZ & (MFCTBLSIZ - 1)) == 0	  /* from sys:route.h */
#define MFCHASHMOD(h)	((h) & (MFCTBLSIZ - 1))
#else
#define MFCHASHMOD(h)	((h) % MFCTBLSIZ)
#endif

#define MAX_UPQ	4		/* max. no of pkts in upcall Q */

/*
 * Token Bucket filter code 
 */
#define MAX_BKT_SIZE    10000             /* 10K bytes size 		*/
#define MAXQSIZE        10                /* max # of pkts in queue 	*/

/*
 * the token bucket filter at each vif
 */
struct tbf
{
    struct timeval tbf_last_pkt_t; /* arr. time of last pkt 	*/
    u_long tbf_n_tok;      	/* no of tokens in bucket 	*/
    u_long tbf_q_len;    	/* length of queue at this vif	*/
    u_long tbf_max_q_len;	/* max. queue length		*/
    struct mbuf *tbf_q;		/* Packet queue			*/
    struct mbuf *tbf_t;		/* tail-insertion pointer	*/
    void * tbf_timeo;		/* gtfTimeout() handle          */
};

/*
 * Structure for measuring the bandwidth and sending an upcall if the
 * measured bandwidth is above or below a threshold.
 */
struct bw_meter {
	struct bw_meter	*bm_mfc_next;		/* next bw meter (same mfc)  */
	struct bw_meter	*bm_time_next;		/* next bw meter (same time) */
	uint32_t	bm_time_hash;		/* the time hash value       */
	struct mfc	*bm_mfc;		/* the corresponding mfc     */
	uint32_t	bm_flags;		/* misc flags (see below)    */
#define BW_METER_UNIT_PACKETS	(1 << 0)	/* threshold (in packets)    */
#define BW_METER_UNIT_BYTES	(1 << 1)	/* threshold (in bytes)      */
#define BW_METER_GEQ		(1 << 2)	/* upcall if bw >= threshold */
#define BW_METER_LEQ		(1 << 3)	/* upcall if bw <= threshold */
#define BW_METER_USER_FLAGS 	(BW_METER_UNIT_PACKETS |		\
				 BW_METER_UNIT_BYTES |			\
				 BW_METER_GEQ |				\
				 BW_METER_LEQ)

#define BW_METER_UPCALL_DELIVERED (1 << 24)	/* upcall was delivered      */

	struct bw_data	bm_threshold;		/* the upcall threshold	     */
	struct bw_data	bm_measured;		/* the measured bw	     */
	struct timeval	bm_start_time;		/* abs. time		     */
};

IMPORT STATUS ipMrouteSysctlInit (void);

#ifdef __cplusplus
}
#endif
    
#endif /* _NETINET_IP_MROUTE_H_ */