kernel-ark/include/net/ip6_fib.h
Noriaki TAKAMIYA a47ed4cd8c [IPV6] XFRM: Fix connected socket to use transformation.
When XFRM policy and state are ready after TCP connection is started,
the traffic should be transformed immediately, however it does not
on IPv6 TCP.

It depends on a dst cache replacement policy with connected socket.
It seems that the replacement is always done for IPv4, however, on
IPv6 case it is done only when routing cookie is changed.

This patch fix that non-transformation dst can be changed to
transformation one.
This behavior is required by MIPv6 and improves IPv6 IPsec.

Fixes by Masahide NAKAMURA.

Signed-off-by: Noriaki TAKAMIYA <takamiya@po.ntts.co.jp>
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:48:32 -07:00

229 lines
4.8 KiB
C

/*
* 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 _IP6_FIB_H
#define _IP6_FIB_H
#ifdef __KERNEL__
#include <linux/ipv6_route.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>
#include <net/dst.h>
#include <net/flow.h>
#include <net/netlink.h>
struct rt6_info;
struct fib6_config
{
u32 fc_table;
u32 fc_metric;
int fc_dst_len;
int fc_src_len;
int fc_ifindex;
u32 fc_flags;
u32 fc_protocol;
struct in6_addr fc_dst;
struct in6_addr fc_src;
struct in6_addr fc_gateway;
unsigned long fc_expires;
struct nlattr *fc_mx;
int fc_mx_len;
struct nl_info fc_nlinfo;
};
struct fib6_node
{
struct fib6_node *parent;
struct fib6_node *left;
struct fib6_node *right;
#ifdef CONFIG_IPV6_SUBTREES
struct fib6_node *subtree;
#endif
struct rt6_info *leaf;
__u16 fn_bit; /* bit key */
__u16 fn_flags;
__u32 fn_sernum;
struct rt6_info *rr_ptr;
};
#ifndef CONFIG_IPV6_SUBTREES
#define FIB6_SUBTREE(fn) NULL
#else
#define FIB6_SUBTREE(fn) ((fn)->subtree)
#endif
/*
* routing information
*
*/
struct rt6key
{
struct in6_addr addr;
int plen;
};
struct fib6_table;
struct rt6_info
{
union {
struct dst_entry dst;
} u;
struct inet6_dev *rt6i_idev;
#define rt6i_dev u.dst.dev
#define rt6i_nexthop u.dst.neighbour
#define rt6i_expires u.dst.expires
struct fib6_node *rt6i_node;
struct in6_addr rt6i_gateway;
u32 rt6i_flags;
u32 rt6i_metric;
atomic_t rt6i_ref;
struct fib6_table *rt6i_table;
struct rt6key rt6i_dst;
struct rt6key rt6i_src;
u8 rt6i_protocol;
#ifdef CONFIG_XFRM
u32 rt6i_flow_cache_genid;
#endif
};
static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
{
return ((struct rt6_info *)dst)->rt6i_idev;
}
struct fib6_walker_t
{
struct fib6_walker_t *prev, *next;
struct fib6_node *root, *node;
struct rt6_info *leaf;
unsigned char state;
unsigned char prune;
int (*func)(struct fib6_walker_t *);
void *args;
};
struct rt6_statistics {
__u32 fib_nodes;
__u32 fib_route_nodes;
__u32 fib_rt_alloc; /* permanent routes */
__u32 fib_rt_entries; /* rt entries in table */
__u32 fib_rt_cache; /* cache routes */
__u32 fib_discarded_routes;
};
#define RTN_TL_ROOT 0x0001
#define RTN_ROOT 0x0002 /* tree root node */
#define RTN_RTINFO 0x0004 /* node with valid routing info */
/*
* priority levels (or metrics)
*
*/
#define RTPRI_FIREWALL 8 /* Firewall control information */
#define RTPRI_FLOW 16 /* Flow based forwarding rules */
#define RTPRI_KERN_CTL 32 /* Kernel control routes */
#define RTPRI_USER_MIN 256 /* Mimimum user priority */
#define RTPRI_USER_MAX 1024 /* Maximum user priority */
#define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
#define MAX_FLOW_BACKTRACE 32
typedef void (*f_pnode)(struct fib6_node *fn, void *);
struct fib6_table {
struct hlist_node tb6_hlist;
u32 tb6_id;
rwlock_t tb6_lock;
struct fib6_node tb6_root;
};
#define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
#define RT6_TABLE_MAIN RT_TABLE_MAIN
#define RT6_TABLE_DFLT RT6_TABLE_MAIN
#define RT6_TABLE_INFO RT6_TABLE_MAIN
#define RT6_TABLE_PREFIX RT6_TABLE_MAIN
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
#define FIB6_TABLE_MIN 1
#define FIB6_TABLE_MAX RT_TABLE_MAX
#define RT6_TABLE_LOCAL RT_TABLE_LOCAL
#else
#define FIB6_TABLE_MIN RT_TABLE_MAIN
#define FIB6_TABLE_MAX FIB6_TABLE_MIN
#define RT6_TABLE_LOCAL RT6_TABLE_MAIN
#endif
typedef struct rt6_info *(*pol_lookup_t)(struct fib6_table *,
struct flowi *, int);
/*
* exported functions
*/
extern struct fib6_table * fib6_get_table(u32 id);
extern struct fib6_table * fib6_new_table(u32 id);
extern struct dst_entry * fib6_rule_lookup(struct flowi *fl, int flags,
pol_lookup_t lookup);
extern struct fib6_node *fib6_lookup(struct fib6_node *root,
struct in6_addr *daddr,
struct in6_addr *saddr);
struct fib6_node *fib6_locate(struct fib6_node *root,
struct in6_addr *daddr, int dst_len,
struct in6_addr *saddr, int src_len);
extern void fib6_clean_all(int (*func)(struct rt6_info *, void *arg),
int prune, void *arg);
extern int fib6_add(struct fib6_node *root,
struct rt6_info *rt,
struct nl_info *info);
extern int fib6_del(struct rt6_info *rt,
struct nl_info *info);
extern void inet6_rt_notify(int event, struct rt6_info *rt,
struct nl_info *info);
extern void fib6_run_gc(unsigned long dummy);
extern void fib6_gc_cleanup(void);
extern void fib6_init(void);
extern void fib6_rules_init(void);
extern void fib6_rules_cleanup(void);
#endif
#endif