Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 | /*
* 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
#include <linux/config.h>
struct kern_rta
{
void *rta_dst;
void *rta_src;
int *rta_iif;
int *rta_oif;
void *rta_gw;
u32 *rta_priority;
void *rta_prefsrc;
struct rtattr *rta_mx;
struct rtattr *rta_mp;
unsigned char *rta_protoinfo;
unsigned char *rta_flow;
struct rta_cacheinfo *rta_ci;
};
struct fib_nh
{
struct device *nh_dev;
unsigned nh_flags;
unsigned char nh_scope;
#ifdef CONFIG_IP_ROUTE_MULTIPATH
int nh_weight;
int nh_power;
#endif
#ifdef CONFIG_NET_CLS_ROUTE
__u32 nh_tclassid;
#endif
int nh_oif;
u32 nh_gw;
};
/*
* This structure contains data shared by many of routes.
*/
struct fib_info
{
struct fib_info *fib_next;
struct fib_info *fib_prev;
int fib_refcnt;
unsigned fib_flags;
int fib_protocol;
u32 fib_prefsrc;
u32 fib_priority;
#define FIB_MAX_METRICS RTAX_RTT
unsigned fib_metrics[FIB_MAX_METRICS];
#define fib_mtu fib_metrics[RTAX_MTU-1]
#define fib_window fib_metrics[RTAX_WINDOW-1]
#define fib_rtt fib_metrics[RTAX_RTT-1]
int fib_nhs;
#ifdef CONFIG_IP_ROUTE_MULTIPATH
int fib_power;
#endif
struct fib_nh fib_nh[0];
#define fib_dev fib_nh[0].nh_dev
};
#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_rule;
#endif
struct fib_result
{
u32 *prefix;
unsigned char prefixlen;
unsigned char nh_sel;
unsigned char type;
unsigned char scope;
struct fib_info *fi;
#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_rule *r;
#endif
};
#ifdef CONFIG_IP_ROUTE_MULTIPATH
#define FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
#define FIB_RES_RESET(res) ((res).nh_sel = 0)
#else /* CONFIG_IP_ROUTE_MULTIPATH */
#define FIB_RES_NH(res) ((res).fi->fib_nh[0])
#define FIB_RES_RESET(res)
#endif /* CONFIG_IP_ROUTE_MULTIPATH */
#define FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __fib_res_prefsrc(&res))
#define FIB_RES_GW(res) (FIB_RES_NH(res).nh_gw)
#define FIB_RES_DEV(res) (FIB_RES_NH(res).nh_dev)
#define FIB_RES_OIF(res) (FIB_RES_NH(res).nh_oif)
struct fib_table
{
unsigned char tb_id;
unsigned tb_stamp;
int (*tb_lookup)(struct fib_table *tb, const struct rt_key *key, struct fib_result *res);
int (*tb_insert)(struct fib_table *table, struct rtmsg *r,
struct kern_rta *rta, struct nlmsghdr *n,
struct netlink_skb_parms *req);
int (*tb_delete)(struct fib_table *table, struct rtmsg *r,
struct kern_rta *rta, struct nlmsghdr *n,
struct netlink_skb_parms *req);
int (*tb_dump)(struct fib_table *table, struct sk_buff *skb,
struct netlink_callback *cb);
int (*tb_flush)(struct fib_table *table);
int (*tb_get_info)(struct fib_table *table, char *buf,
int first, int count);
void (*tb_select_default)(struct fib_table *table,
const struct rt_key *key, struct fib_result *res);
unsigned char tb_data[0];
};
#ifndef CONFIG_IP_MULTIPLE_TABLES
extern struct fib_table *local_table;
extern struct fib_table *main_table;
extern __inline__ struct fib_table *fib_get_table(int id)
{
if (id != RT_TABLE_LOCAL)
return main_table;
return local_table;
}
extern __inline__ struct fib_table *fib_new_table(int id)
{
return fib_get_table(id);
}
extern __inline__ int fib_lookup(const struct rt_key *key, struct fib_result *res)
{
if (local_table->tb_lookup(local_table, key, res) &&
main_table->tb_lookup(main_table, key, res))
return -ENETUNREACH;
return 0;
}
extern __inline__ void fib_select_default(const struct rt_key *key, struct fib_result *res)
{
if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
main_table->tb_select_default(main_table, key, res);
}
#else /* CONFIG_IP_MULTIPLE_TABLES */
#define local_table (fib_tables[RT_TABLE_LOCAL])
#define main_table (fib_tables[RT_TABLE_MAIN])
extern struct fib_table * fib_tables[RT_TABLE_MAX+1];
extern int fib_lookup(const struct rt_key *key, struct fib_result *res);
extern struct fib_table *__fib_new_table(int id);
extern __inline__ struct fib_table *fib_get_table(int id)
{
if (id == 0)
id = RT_TABLE_MAIN;
return fib_tables[id];
}
extern __inline__ struct fib_table *fib_new_table(int id)
{
if (id == 0)
id = RT_TABLE_MAIN;
return fib_tables[id] ? : __fib_new_table(id);
}
extern void fib_select_default(const struct rt_key *key, struct fib_result *res);
#endif /* CONFIG_IP_MULTIPLE_TABLES */
/* Exported by fib_frontend.c */
extern void ip_fib_init(void);
extern void fib_flush(void);
extern int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
extern int fib_validate_source(u32 src, u32 dst, u8 tos, int oif,
struct device *dev, u32 *spec_dst, u32 *itag);
extern void fib_select_multipath(const struct rt_key *key, struct fib_result *res);
/* Exported by fib_semantics.c */
extern int ip_fib_check_default(u32 gw, struct device *dev);
extern void fib_release_info(struct fib_info *);
extern int fib_semantic_match(int type, struct fib_info *,
const struct rt_key *, struct fib_result*);
extern struct fib_info *fib_create_info(const struct rtmsg *r, struct kern_rta *rta,
const struct nlmsghdr *, int *err);
extern int fib_nh_match(struct rtmsg *r, struct nlmsghdr *, struct kern_rta *rta, struct fib_info *fi);
extern int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
u8 tb_id, u8 type, u8 scope, void *dst, int dst_len, u8 tos,
struct fib_info *fi);
extern int fib_sync_down(u32 local, struct device *dev, int force);
extern int fib_sync_up(struct device *dev);
extern int fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
struct kern_rta *rta, struct rtentry *r);
extern void fib_node_get_info(int type, int dead, struct fib_info *fi, u32 prefix, u32 mask, char *buffer);
extern u32 __fib_res_prefsrc(struct fib_result *res);
/* Exported by fib_hash.c */
extern struct fib_table *fib_hash_init(int id);
#ifdef CONFIG_IP_MULTIPLE_TABLES
/* Exported by fib_rules.c */
extern int inet_rtm_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet_rtm_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
extern int inet_dump_rules(struct sk_buff *skb, struct netlink_callback *cb);
extern u32 fib_rules_map_destination(u32 daddr, struct fib_result *res);
#ifdef CONFIG_NET_CLS_ROUTE
extern u32 fib_rules_tclass(struct fib_result *res);
#endif
extern u32 fib_rules_policy(u32 saddr, struct fib_result *res, unsigned *flags);
extern void fib_rules_init(void);
#endif
extern __inline__ void fib_combine_itag(u32 *itag, struct fib_result *res)
{
#ifdef CONFIG_NET_CLS_ROUTE
#ifdef CONFIG_IP_MULTIPLE_TABLES
u32 rtag;
#endif
*itag = FIB_RES_NH(*res).nh_tclassid<<16;
#ifdef CONFIG_IP_MULTIPLE_TABLES
rtag = fib_rules_tclass(res);
if (*itag == 0)
*itag = (rtag<<16);
*itag |= (rtag>>16);
#endif
#endif
}
#endif _NET_FIB_H
|