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Diffstat (limited to 'include/net/ip_fib.h')
| -rw-r--r-- | include/net/ip_fib.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h new file mode 100644 index 000000000..e96378d77 --- /dev/null +++ b/include/net/ip_fib.h @@ -0,0 +1,133 @@ +/* + * 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 |