NAME

SYNOPSIS

DESCRIPTION

The Routing Socket

#define RTM_ADD		0x1	/* Add Route */
#define RTM_DELETE	0x2	/* Delete Route */
#define RTM_CHANGE	0x3	/* Change Metrics or flags */
#define RTM_GET		0x4	/* Report Metrics */
#define RTM_LOSING	0x5	/* Kernel Suspects Partitioning */
#define RTM_REDIRECT	0x6	/* Told to use different route */
#define RTM_MISS	0x7	/* Lookup failed on this address */
#define RTM_LOCK	0x8	/* fix specified metrics */
#define RTM_RESOLVE	0xb	/* req to resolve dst to LL addr */
#define RTM_NEWADDR	0xc	/* address being added to iface */
#define RTM_DELADDR	0xd	/* address being removed from iface */
#define RTM_IFINFO	0xe	/* iface going up/down etc. */
#define RTM_IFANNOUNCE	0xf	/* iface arrival/departure */

struct rt_msghdr {
	u_short	rtm_msglen;	/* to skip over non-understood messages */
	u_char	rtm_version;	/* future binary compatibility */
	u_char	rtm_type;	/* message type */
	u_short	rtm_index;	/* index for associated ifp */
	int	rtm_flags;	/* flags, incl. kern & message, eg DONE */
	int	rtm_addrs;	/* bitmask identifying sockaddrs in msg */
	pid_t	rtm_pid;	/* identify sender */
	int	rtm_seq;	/* for sender to identify action */
	int	rtm_errno;	/* why failed */
	int	rtm_use;	/* deprecated use rtm_rmx->rmx_pksent */
#define rtm_fmask	rtm_use	/* bitmask used in RTM_CHANGE message */
	u_long	rtm_inits;	/* which metrics we are initializing */
	struct	rt_metrics rtm_rmx; /* metrics themselves */
};

struct if_msghdr {
	u_short	ifm_msglen;	/* to skip over non-understood messages */
	u_char	ifm_version;	/* future binary compatibility */
	u_char	ifm_type;	/* message type */
	int	ifm_addrs;	/* like rtm_addrs */
	int	ifm_flags;	/* value of if_flags */
	u_short	ifm_index;	/* index for associated ifp */
	struct	if_data ifm_data;/* statistics and other data about if */
};

struct ifa_msghdr {
	u_short	ifam_msglen;	/* to skip over non-understood messages */
	u_char	ifam_version;	/* future binary compatibility */
	u_char	ifam_type;	/* message type */
	int	ifam_addrs;	/* like rtm_addrs */
	int	ifam_flags;	/* value of ifa_flags */
	u_short	ifam_index;	/* index for associated ifp */
	int	ifam_metric;	/* value of ifa_metric */
};

struct if_announcemsghdr {
	u_short	ifan_msglen;	/* to skip over non-understood messages */
	u_char	ifan_version;	/* future binary compatibility */
	u_char	ifan_type;	/* message type */
	u_short	ifan_index;	/* index for associated ifp */
	char	ifan_name[IFNAMSIZ];	/* if name, e.g. "en0" */
	u_short	ifan_what;	/* what type of announcement */
};

struct rt_metrics {
	u_long	rmx_locks;	/* Kernel must leave these values alone */
	u_long	rmx_mtu;	/* MTU for this path */
	u_long	rmx_hopcount;	/* max hops expected */
	u_long	rmx_expire;	/* lifetime for route, e.g. redirect */
	u_long	rmx_recvpipe;	/* inbound delay-bandwidth product */
	u_long	rmx_sendpipe;	/* outbound delay-bandwidth product */
	u_long	rmx_ssthresh;	/* outbound gateway buffer limit */
	u_long	rmx_rtt;	/* estimated round trip time */
	u_long	rmx_rttvar;	/* estimated rtt variance */
	u_long	rmx_pksent;	/* packets sent using this route */
};

#define	RTF_UP        0x1       /* route usable */
#define	RTF_GATEWAY   0x2       /* destination is a gateway */
#define	RTF_HOST      0x4       /* host entry (net otherwise) */
#define	RTF_REJECT    0x8       /* host or net unreachable */
#define	RTF_DYNAMIC   0x10      /* created dynamically (by redirect) */
#define	RTF_MODIFIED  0x20      /* modified dynamically (by redirect) */
#define	RTF_DONE      0x40      /* message confirmed */
#define	RTF_MASK      0x80      /* subnet mask present */
#define	RTF_CLONING   0x100     /* generate new routes on use */
#define	RTF_XRESOLVE  0x200     /* external daemon resolves name */
#define	RTF_LLINFO    0x400     /* generated by ARP or ESIS */
#define	RTF_STATIC    0x800     /* manually added */
#define	RTF_BLACKHOLE 0x1000    /* just discard pkts (during updates) */
#define	RTF_PROTO2    0x4000    /* protocol specific routing flag */
#define	RTF_PROTO1    0x8000    /* protocol specific routing flag */
#define	RTF_CLONED    0x10000   /* this is a cloned route */
#define RTF_MPATH     0x40000   /* multipath route or operation */

#define RTV_MTU		0x1	/* init or lock _mtu */
#define RTV_HOPCOUNT	0x2	/* init or lock _hopcount */
#define RTV_EXPIRE	0x4	/* init or lock _hopcount */
#define RTV_RPIPE	0x8	/* init or lock _recvpipe */
#define RTV_SPIPE	0x10	/* init or lock _sendpipe */
#define RTV_SSTHRESH	0x20	/* init or lock _ssthresh */
#define RTV_RTT		0x40	/* init or lock _rtt */
#define RTV_RTTVAR	0x80	/* init or lock _rttvar */

#define RTA_DST		0x1	/* destination sockaddr present */
#define RTA_GATEWAY	0x2	/* gateway sockaddr present */
#define RTA_NETMASK	0x4	/* netmask sockaddr present */
#define RTA_GENMASK	0x8	/* cloning mask sockaddr present */
#define RTA_IFP		0x10	/* interface name sockaddr present */
#define RTA_IFA		0x20	/* interface addr sockaddr present */
#define RTA_AUTHOR	0x40	/* sockaddr for author of redirect */
#define RTA_BRD		0x80	/* for NEWADDR, bcast or p-p dest addr */
#define RTA_LABEL	0x400	/* route label present */

SEE ALSO

HISTORY