1#ifndef _NET_DN_FIB_H
2#define _NET_DN_FIB_H
3
4#include <linux/config.h>
5
6#ifdef CONFIG_DECNET_ROUTER
7
8#include <linux/rtnetlink.h>
9
10struct dn_kern_rta
11{
12        void            *rta_dst;
13        void            *rta_src;
14        int             *rta_iif;
15        int             *rta_oif;
16        void            *rta_gw;
17        u32             *rta_priority;
18        void            *rta_prefsrc;
19        struct rtattr   *rta_mx;
20        struct rtattr   *rta_mp;
21        unsigned char   *rta_protoinfo;
22        unsigned char   *rta_flow;
23        struct rta_cacheinfo *rta_ci;
24};
25
26struct dn_fib_key {
27	dn_address src;
28	dn_address dst;
29	int iif;
30	int oif;
31	u32 fwmark;
32	unsigned char scope;
33};
34
35struct dn_fib_res {
36	struct dn_fib_rule *r;
37	struct dn_fib_info *fi;
38	unsigned char prefixlen;
39	unsigned char nh_sel;
40	unsigned char type;
41	unsigned char scope;
42};
43
44struct dn_fib_nh {
45	struct net_device	*nh_dev;
46	unsigned		nh_flags;
47	unsigned char		nh_scope;
48	int			nh_weight;
49	int			nh_power;
50	int			nh_oif;
51	u32			nh_gw;
52};
53
54struct dn_fib_info {
55	struct dn_fib_info	*fib_next;
56	struct dn_fib_info	*fib_prev;
57	int 			fib_treeref;
58	atomic_t		fib_clntref;
59	int			fib_dead;
60	unsigned		fib_flags;
61	int			fib_protocol;
62	dn_address		fib_prefsrc;
63	u32			fib_priority;
64	int			fib_nhs;
65	int			fib_power;
66	struct dn_fib_nh	fib_nh[0];
67#define fib_dev		fib_nh[0].nh_dev
68};
69
70
71#define DN_FIB_RES_NH(res)	((res).fi->fib_nh[(res).nh_sel])
72#define DN_FIB_RES_RESET(res)	((res).nh_sel = 0)
73#define DN_FIB_RES_GW(res)	(DN_FIB_RES_NH(res).nh_gw)
74#define DN_FIB_RES_DEV(res)	(DN_FIB_RES_NH(res).nh_dev)
75#define DN_FIB_RES_OIF(res)	(DN_FIB_RES_NH(res).nh_oif)
76
77typedef struct {
78	u16	datum;
79} dn_fib_key_t;
80
81typedef struct {
82	u16	datum;
83} dn_fib_hash_t;
84
85typedef struct {
86	u16	datum;
87} dn_fib_idx_t;
88
89struct dn_fib_node {
90	struct dn_fib_node *fn_next;
91	struct dn_fib_info *fn_info;
92#define DN_FIB_INFO(f) ((f)->fn_info)
93	dn_fib_key_t	fn_key;
94	u8		fn_type;
95	u8		fn_scope;
96	u8		fn_state;
97};
98
99
100struct dn_fib_table {
101	int n;
102
103	int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
104			struct dn_kern_rta *rta, struct nlmsghdr *n,
105			struct netlink_skb_parms *req);
106	int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
107			struct dn_kern_rta *rta, struct nlmsghdr *n,
108			struct netlink_skb_parms *req);
109	int (*lookup)(struct dn_fib_table *t, const struct dn_fib_key *key,
110			struct dn_fib_res *res);
111	int (*flush)(struct dn_fib_table *t);
112#ifdef CONFIG_PROC_FS
113	int (*get_info)(struct dn_fib_table *table, char *buf,
114			int first, int count);
115#endif /* CONFIG_PROC_FS */
116	int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
117
118	unsigned char data[0];
119};
120
121
122/*
123 * dn_fib.c
124 */
125extern void dn_fib_init(void);
126extern void dn_fib_cleanup(void);
127
128extern int dn_fib_rt_message(struct sk_buff *skb);
129extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd,
130			unsigned long arg);
131extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
132				struct dn_kern_rta *rta,
133				const struct nlmsghdr *nlh, int *errp);
134extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
135			const struct dn_fib_key *key, struct dn_fib_res *res);
136extern void dn_fib_release_info(struct dn_fib_info *fi);
137extern u16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
138extern void dn_fib_flush(void);
139extern void dn_fib_select_multipath(const struct dn_fib_key *key,
140					struct dn_fib_res *res);
141extern int dn_fib_sync_down(dn_address local, struct net_device *dev,
142				int force);
143extern int dn_fib_sync_up(struct net_device *dev);
144
145/*
146 * dn_tables.c
147 */
148extern struct dn_fib_table *dn_fib_get_table(int n, int creat);
149extern struct dn_fib_table *dn_fib_empty_table(void);
150extern void dn_fib_table_init(void);
151extern void dn_fib_table_cleanup(void);
152
153/*
154 * dn_rules.c
155 */
156extern void dn_fib_rules_init(void);
157extern void dn_fib_rules_cleanup(void);
158extern void dn_fib_rule_put(struct dn_fib_rule *);
159extern int dn_fib_lookup(struct dn_fib_key *key, struct dn_fib_res *res);
160
161/*
162 * rtnetlink interface
163 */
164extern int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
165extern int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
166extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
167
168extern int dn_fib_rtm_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
169extern int dn_fib_rtm_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
170extern int dn_fib_dump_rules(struct sk_buff *skb, struct netlink_callback *cb);
171
172#define DN_NUM_TABLES 255
173#define DN_MIN_TABLE 1
174#define DN_DEFAULT_TABLE 1
175#define DN_L1_TABLE 1
176#define DN_L2_TABLE 2
177
178extern void dn_fib_free_info(struct dn_fib_info *fi);
179
180static __inline__ void dn_fib_info_put(struct dn_fib_info *fi)
181{
182	if (atomic_dec_and_test(&fi->fib_clntref))
183		dn_fib_free_info(fi);
184}
185
186static __inline__ void dn_fib_res_put(struct dn_fib_res *res)
187{
188	if (res->fi)
189		dn_fib_info_put(res->fi);
190	if (res->r)
191		dn_fib_rule_put(res->r);
192}
193
194static __inline__ u16 dnet_make_mask(int n)
195{
196        if (n)
197                return htons(~((1<<(16-n))-1));
198        return 0;
199}
200
201#endif /* CONFIG_DECNET_ROUTER */
202
203#endif /* _NET_DN_FIB_H */
204