1#ifndef _NET_DN_FIB_H
  2#define _NET_DN_FIB_H
  3
  4/* WARNING: The ordering of these elements must match ordering
  5 *          of RTA_* rtnetlink attribute numbers.
  6 */
  7struct dn_kern_rta {
  8        void            *rta_dst;
  9        void            *rta_src;
 10        int             *rta_iif;
 11        int             *rta_oif;
 12        void            *rta_gw;
 13        u32             *rta_priority;
 14        void            *rta_prefsrc;
 15        struct rtattr   *rta_mx;
 16        struct rtattr   *rta_mp;
 17        unsigned char   *rta_protoinfo;
 18        u32             *rta_flow;
 19        struct rta_cacheinfo *rta_ci;
 20	struct rta_session *rta_sess;
 21};
 22
 23struct dn_fib_res {
 24	struct fib_rule *r;
 25	struct dn_fib_info *fi;
 26	unsigned char prefixlen;
 27	unsigned char nh_sel;
 28	unsigned char type;
 29	unsigned char scope;
 30};
 31
 32struct dn_fib_nh {
 33	struct net_device	*nh_dev;
 34	unsigned		nh_flags;
 35	unsigned char		nh_scope;
 36	int			nh_weight;
 37	int			nh_power;
 38	int			nh_oif;
 39	__le16			nh_gw;
 40};
 41
 42struct dn_fib_info {
 43	struct dn_fib_info	*fib_next;
 44	struct dn_fib_info	*fib_prev;
 45	int 			fib_treeref;
 46	atomic_t		fib_clntref;
 47	int			fib_dead;
 48	unsigned		fib_flags;
 49	int			fib_protocol;
 50	__le16			fib_prefsrc;
 51	__u32			fib_priority;
 52	__u32			fib_metrics[RTAX_MAX];
 53	int			fib_nhs;
 54	int			fib_power;
 55	struct dn_fib_nh	fib_nh[0];
 56#define dn_fib_dev		fib_nh[0].nh_dev
 57};
 58
 59
 60#define DN_FIB_RES_RESET(res)	((res).nh_sel = 0)
 61#define DN_FIB_RES_NH(res)	((res).fi->fib_nh[(res).nh_sel])
 62
 63#define DN_FIB_RES_PREFSRC(res)	((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
 64#define DN_FIB_RES_GW(res)	(DN_FIB_RES_NH(res).nh_gw)
 65#define DN_FIB_RES_DEV(res)	(DN_FIB_RES_NH(res).nh_dev)
 66#define DN_FIB_RES_OIF(res)	(DN_FIB_RES_NH(res).nh_oif)
 67
 68typedef struct {
 69	__le16	datum;
 70} dn_fib_key_t;
 71
 72typedef struct {
 73	__le16	datum;
 74} dn_fib_hash_t;
 75
 76typedef struct {
 77	__u16	datum;
 78} dn_fib_idx_t;
 79
 80struct dn_fib_node {
 81	struct dn_fib_node *fn_next;
 82	struct dn_fib_info *fn_info;
 83#define DN_FIB_INFO(f) ((f)->fn_info)
 84	dn_fib_key_t	fn_key;
 85	u8		fn_type;
 86	u8		fn_scope;
 87	u8		fn_state;
 88};
 89
 90
 91struct dn_fib_table {
 92	struct hlist_node hlist;
 93	u32 n;
 94
 95	int (*insert)(struct dn_fib_table *t, struct rtmsg *r, 
 96			struct dn_kern_rta *rta, struct nlmsghdr *n, 
 97			struct netlink_skb_parms *req);
 98	int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
 99			struct dn_kern_rta *rta, struct nlmsghdr *n,
100			struct netlink_skb_parms *req);
101	int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
102			struct dn_fib_res *res);
103	int (*flush)(struct dn_fib_table *t);
104	int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
105
106	unsigned char data[0];
107};
108
109#ifdef CONFIG_DECNET_ROUTER
110/*
111 * dn_fib.c
112 */
113extern void dn_fib_init(void);
114extern void dn_fib_cleanup(void);
115
116extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd, 
117			unsigned long arg);
118extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, 
119				struct dn_kern_rta *rta, 
120				const struct nlmsghdr *nlh, int *errp);
121extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi, 
122			const struct flowidn *fld,
123			struct dn_fib_res *res);
124extern void dn_fib_release_info(struct dn_fib_info *fi);
125extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
126extern void dn_fib_flush(void);
127extern void dn_fib_select_multipath(const struct flowidn *fld,
128					struct dn_fib_res *res);
129
130/*
131 * dn_tables.c
132 */
133extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
134extern struct dn_fib_table *dn_fib_empty_table(void);
135extern void dn_fib_table_init(void);
136extern void dn_fib_table_cleanup(void);
137
138/*
139 * dn_rules.c
140 */
141extern void dn_fib_rules_init(void);
142extern void dn_fib_rules_cleanup(void);
143extern unsigned dnet_addr_type(__le16 addr);
144extern int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
145
146extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
147
148extern void dn_fib_free_info(struct dn_fib_info *fi);
149
150static inline void dn_fib_info_put(struct dn_fib_info *fi)
151{
152	if (atomic_dec_and_test(&fi->fib_clntref))
153		dn_fib_free_info(fi);
154}
155
156static inline void dn_fib_res_put(struct dn_fib_res *res)
157{
158	if (res->fi)
159		dn_fib_info_put(res->fi);
160	if (res->r)
161		fib_rule_put(res->r);
162}
163
164#else /* Endnode */
165
166#define dn_fib_init()  do { } while(0)
167#define dn_fib_cleanup() do { } while(0)
168
169#define dn_fib_lookup(fl, res) (-ESRCH)
170#define dn_fib_info_put(fi) do { } while(0)
171#define dn_fib_select_multipath(fl, res) do { } while(0)
172#define dn_fib_rules_policy(saddr,res,flags) (0)
173#define dn_fib_res_put(res) do { } while(0)
174
175#endif /* CONFIG_DECNET_ROUTER */
176
177static inline __le16 dnet_make_mask(int n)
178{
179	if (n)
180		return cpu_to_le16(~((1 << (16 - n)) - 1));
181	return cpu_to_le16(0);
182}
183
184#endif /* _NET_DN_FIB_H */