patch-2.1.8 linux/include/net/ipv6_route.h

• Lines: 197
• Date: Sun Nov 3 11:04:42 1996
• Orig file: v2.1.7/linux/include/net/ipv6_route.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.7/linux/include/net/ipv6_route.h linux/include/net/ipv6_route.h
@@ -0,0 +1,196 @@
+/*
+ *	Linux INET6 implementation 
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>	
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _NET_IPV6_ROUTE_H
+#define _NET_IPV6_ROUTE_H
+
+#include <linux/ipv6_route.h>
+
+
+#ifdef __KERNEL__
+
+
+struct fib6_node {
+	struct fib6_node	*parent;
+	struct fib6_node	*left;
+	struct fib6_node	*right;
+
+	struct rt6_info		*leaf;
+
+	__u16			fn_bit;		/* bit key */
+	__u16			fn_flags;
+	__u32			fn_sernum;
+};
+
+
+struct rt6_info;
+
+typedef void (*rt6_output_method_t) (struct sk_buff *skb, struct rt6_info *rt);
+
+struct rt6_info {
+	struct fib6_node	*fib_node;
+	struct rt6_info		*next;
+
+	struct in6_addr		rt_dst;
+	
+	atomic_t		rt_use;		/* dcache references	*/
+	atomic_t		rt_ref;		/* fib references	*/
+
+	struct neighbour        *rt_nexthop;
+	struct device		*rt_dev;
+	
+	rt6_output_method_t	rt_output_method;
+
+	__u16			rt_metric;
+	__u16			rt_prefixlen;
+	__u32			rt_flags;
+	unsigned long		rt_expires;
+};
+
+extern struct rt6_info		*default_rt_list;
+extern struct rt6_info		*last_resort_rt;
+
+struct dest_entry {
+	struct rt6_info		rt;
+
+	__u32			dc_irtt;
+	__u32			dc_window;
+	__u16			dc_pmtu;
+
+	unsigned long		dc_tstamp;	/* for garbage collection */
+
+#define dc_addr			rt.rt_dst
+#define dc_usecnt		rt.rt_use
+#define dc_nexthop		rt.rt_nexthop
+#define dc_flags		rt.rt_flags
+};
+
+/*
+ *	Structure for assync processing of operations on the routing
+ *	table
+ */
+
+struct rt6_req {
+	int			operation;
+	struct rt6_info		*ptr;
+
+	struct rt6_req		*next;
+	struct rt6_req		*prev;
+
+#define RT_OPER_ADD		1
+#define RT_OPER_DEL		2
+};
+
+struct rt6_statistics {
+	__u32		fib_nodes;
+	__u32		fib_route_nodes;
+	__u32		fib_rt_alloc;
+	__u32		fib_rt_entries;
+	__u32		fib_dc_alloc;
+};
+
+#define RTN_ROOT	0x0001		/* root node			*/
+#define RTN_BACKTRACK	0x0002		/* backtrack point		*/
+#define RTN_TAG		0x0010
+
+/*
+ *	Values for destination cache garbage colection
+ *	These are wild guesses for now...
+ */
+
+#define	DC_WATER_MARK		512
+#define DC_SHORT_TIMEOUT	(5*HZ)
+#define DC_LONG_TIMEOUT	        (15*HZ)
+
+#define DC_TIME_RUN		(5*HZ)
+#define DC_TIME_RETRY		HZ
+
+/*
+ *	Prototypes
+ */
+
+/*
+ *	check/obtain destination cache from routing table
+ */
+
+extern struct dest_entry *	ipv6_dst_check(struct dest_entry *dc, 
+					       struct in6_addr * daddr,
+					       __u32 sernum, int flags);
+
+extern struct dest_entry *	ipv6_dst_route(struct in6_addr * daddr,
+					       struct device *src_dev,
+					       int flags);
+
+extern void			ipv6_dst_unlock(struct dest_entry *dest);
+
+extern struct rt6_info *	fibv6_lookup(struct in6_addr *addr,
+					     struct device *dev,
+					     int flags);
+
+/*
+ *	user space set/del route
+ */
+
+extern int			ipv6_route_ioctl(unsigned int cmd, void *arg);
+
+
+extern void			ipv6_route_init(void);
+extern void			ipv6_route_cleanup(void);
+
+extern int			ipv6_route_add(struct in6_rtmsg *rt);
+
+extern int			fib6_del_rt(struct rt6_info *rt);
+
+extern void			rt6_sndmsg(__u32 type, struct in6_addr *dst,
+					   struct in6_addr *gw, __u16 plen,
+					   __u16 metric, char *devname,
+					   __u16 flags);
+/*
+ *	ICMP interface
+ */
+
+extern struct rt6_info *	ipv6_rt_redirect(struct device *dev,
+						 struct in6_addr *dest,
+						 struct in6_addr *target,
+						 int on_link);
+
+extern void			rt6_handle_pmtu(struct in6_addr *addr,
+						int pmtu);
+/*
+ *
+ */
+
+extern struct fib6_node		routing_table;
+extern struct rt6_statistics	rt6_stats;
+
+static __inline__ void rt_release(struct rt6_info *rt)
+{
+	atomic_dec(&rt->rt_ref);
+	if ((rt->rt_use | rt->rt_ref) == 0)
+	{
+		if (rt->rt_nexthop)
+		{
+			ndisc_dec_neigh(rt->rt_nexthop);
+		}
+
+		if (rt->rt_flags & RTI_DCACHE)
+		{
+			rt6_stats.fib_dc_alloc--;
+		}
+		rt6_stats.fib_rt_alloc--;
+		kfree(rt);
+	}
+}
+
+#endif
+
+#endif