1 files changed, 18 insertions, 0 deletions

diff --git a/sys/net/if_var.h b/sys/net/if_var.h
index a598d19..0b6e40d 100644
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -77,6 +77,7 @@ struct	ether_header;
 
 TAILQ_HEAD(ifnethead, ifnet);	/* we use TAILQs so that the order of */
 TAILQ_HEAD(ifaddrhead, ifaddr);	/* instantiation is preserved in the list */
+TAILQ_HEAD(ifprefixhead, ifprefix);
 LIST_HEAD(ifmultihead, ifmultiaddr);
 
 /*
@@ -138,6 +139,7 @@ struct ifnet {
 		__P((struct ifnet *, struct sockaddr **, struct sockaddr *));
 	struct	ifqueue if_snd;		/* output queue */
 	struct	ifqueue *if_poll_slowq;	/* input queue for slow devices */
+	struct	ifprefixhead if_prefixhead; /* list of prefixes per if */
 };
 typedef void if_init_f_t __P((void *));
 
@@ -269,6 +271,20 @@ struct ifaddr {
 #define	IFA_ROUTE	RTF_UP		/* route installed */
 
 /*
+ * The prefix structure contains information about one prefix
+ * of an interface.  They are maintained by the different address families,
+ * are allocated and attached when an prefix or an address is set,
+ * and are linked together so all prfefixes for an interface can be located.
+ */
+struct ifprefix {
+	struct	sockaddr *ifpr_prefix;	/* prefix of interface */
+	struct	ifnet *ifpr_ifp;	/* back-pointer to interface */
+	TAILQ_ENTRY(ifprefix)	*ifpr_list; /* queue macro glue */
+	u_char	ifpr_plen;		/* prefix length in bits */
+	u_char	ifpr_type;		/* protocol dependent prefix type */
+};
+
+/*
  * Multicast address structure.  This is analogous to the ifaddr
  * structure except that it keeps track of multicast addresses.
  * Also, the reference count here is a count of requests for this
@@ -293,6 +309,7 @@ struct ifmultiaddr {
 	} while (0)
 
 extern	struct ifnethead ifnet;
+extern struct	ifnet	**ifindex2ifnet;
 extern	int ifqmaxlen;
 extern	struct ifnet loif[];
 extern	int if_index;
@@ -318,6 +335,7 @@ void	if_up __P((struct ifnet *));
 int	ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
 int	ifpromisc __P((struct ifnet *, int));
 struct	ifnet *ifunit __P((char *));
+struct	ifnet *if_withname __P((struct sockaddr *));
 
 int	if_poll_recv_slow __P((struct ifnet *ifp, int *quotap));
 void	if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap));