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/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Definitions for the Forwarding Information Base.
*
* Authors: A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* 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_IP_FIB_H
#define _NET_IP_FIB_H
struct fib_node
{
struct fib_node *fib_next;
u32 fib_key;
struct fib_info *fib_info;
short fib_metric;
u8 fib_tos;
u8 fib_flag;
};
#define FIBFLG_DOWN 1 /* Ignore this node */
#define FIBFLG_THROW 2 /* Class lookup failed */
#define FIBFLG_REJECT 4 /* Route lookup failed */
#define MAGIC_METRIC 0x7FFF
/*
* This structure contains data shared by many of routes.
*/
struct fib_info
{
struct fib_info *fib_next;
struct fib_info *fib_prev;
u32 fib_gateway;
struct device *fib_dev;
int fib_refcnt;
unsigned long fib_window;
unsigned fib_flags;
unsigned short fib_mtu;
unsigned short fib_irtt;
};
struct fib_zone
{
struct fib_zone *fz_next;
struct fib_node **fz_hash;
int fz_nent;
int fz_divisor;
u32 fz_hashmask;
int fz_logmask;
u32 fz_mask;
};
struct fib_class
{
unsigned char cl_id;
unsigned char cl_auto;
struct fib_zone *fib_zones[33];
struct fib_zone *fib_zone_list;
int cl_users;
};
struct fib_rule
{
struct fib_rule *cl_next;
struct fib_class *cl_class;
u32 cl_src;
u32 cl_srcmask;
u32 cl_dst;
u32 cl_dstmask;
u32 cl_srcmap;
u8 cl_action;
u8 cl_flags;
u8 cl_tos;
u8 cl_preference;
struct device *cl_dev;
};
struct fib_result
{
struct fib_node *f;
struct fib_rule *fr;
int fm;
};
void ip_fib_init(void);
unsigned ip_fib_chk_addr(u32 addr);
int ip_fib_chk_default_gw(u32 addr, struct device*);
int fib_lookup(struct fib_result *, u32 daddr, u32 src, u8 tos, struct device *devin,
struct device *devout);
static __inline__ struct fib_info *
fib_lookup_info(u32 dst, u32 src, u8 tos, struct device *devin,
struct device *devout)
{
struct fib_result res;
if (fib_lookup(&res, dst, src, tos, devin, devout) < 0)
return NULL;
return res.f->fib_info;
}
static __inline__ struct device * get_gw_dev(u32 gw, struct device *dev)
{
struct fib_info * fi;
fi = fib_lookup_info(gw, 0, 1, &loopback_dev, dev);
if (fi)
return fi->fib_dev;
return NULL;
}
extern int ip_rt_event(int event, struct device *dev);
extern int ip_rt_ioctl(unsigned int cmd, void *arg);
extern void ip_rt_change_broadcast(struct device *, u32);
extern void ip_rt_change_dstaddr(struct device *, u32);
extern void ip_rt_change_netmask(struct device *, u32);
extern void ip_rt_multicast_event(struct device *dev);
extern struct device * ip_dev_find_tunnel(u32 daddr, u32 saddr);
#endif _NET_FIB_H
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