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 */
7 struct dn_kern_rta
8 {
9 void *rta_dst;
10 void *rta_src;
11 int *rta_iif;
12 int *rta_oif;
13 void *rta_gw;
14 u32 *rta_priority;
15 void *rta_prefsrc;
16 struct rtattr *rta_mx;
17 struct rtattr *rta_mp;
18 unsigned char *rta_protoinfo;
19 u32 *rta_flow;
20 struct rta_cacheinfo *rta_ci;
21 struct rta_session *rta_sess;
22 };
23
24 struct dn_fib_res {
25 struct dn_fib_rule *r;
26 struct dn_fib_info *fi;
27 unsigned char prefixlen;
28 unsigned char nh_sel;
29 unsigned char type;
30 unsigned char scope;
31 };
32
33 struct dn_fib_nh {
34 struct net_device *nh_dev;
35 unsigned nh_flags;
36 unsigned char nh_scope;
37 int nh_weight;
38 int nh_power;
39 int nh_oif;
40 u32 nh_gw;
41 };
42
43 struct dn_fib_info {
44 struct dn_fib_info *fib_next;
45 struct dn_fib_info *fib_prev;
46 int fib_treeref;
47 atomic_t fib_clntref;
48 int fib_dead;
49 unsigned fib_flags;
50 int fib_protocol;
51 dn_address fib_prefsrc;
52 __u32 fib_priority;
53 __u32 fib_metrics[RTAX_MAX];
54 #define dn_fib_mtu fib_metrics[RTAX_MTU-1]
55 #define dn_fib_window fib_metrics[RTAX_WINDOW-1]
56 #define dn_fib_rtt fib_metrics[RTAX_RTT-1]
57 #define dn_fib_advmss fib_metrics[RTAX_ADVMSS-1]
58 int fib_nhs;
59 int fib_power;
60 struct dn_fib_nh fib_nh[0];
61 #define dn_fib_dev fib_nh[0].nh_dev
62 };
63
64
65 #define DN_FIB_RES_RESET(res) ((res).nh_sel = 0)
66 #define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
67
68 #define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
69 #define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw)
70 #define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev)
71 #define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif)
72
73 typedef struct {
74 u16 datum;
75 } dn_fib_key_t;
76
77 typedef struct {
78 u16 datum;
79 } dn_fib_hash_t;
80
81 typedef struct {
82 u16 datum;
83 } dn_fib_idx_t;
84
85 struct dn_fib_node {
86 struct dn_fib_node *fn_next;
87 struct dn_fib_info *fn_info;
88 #define DN_FIB_INFO(f) ((f)->fn_info)
89 dn_fib_key_t fn_key;
90 u8 fn_type;
91 u8 fn_scope;
92 u8 fn_state;
93 };
94
95
96 struct dn_fib_table {
97 int n;
98
99 int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
100 struct dn_kern_rta *rta, struct nlmsghdr *n,
101 struct netlink_skb_parms *req);
102 int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
103 struct dn_kern_rta *rta, struct nlmsghdr *n,
104 struct netlink_skb_parms *req);
105 int (*lookup)(struct dn_fib_table *t, const struct flowi *fl,
106 struct dn_fib_res *res);
107 int (*flush)(struct dn_fib_table *t);
108 int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
109
110 unsigned char data[0];
111 };
112
113 #ifdef CONFIG_DECNET_ROUTER
114 /*
115 * dn_fib.c
116 */
117 extern void dn_fib_init(void);
118 extern void dn_fib_cleanup(void);
119
120 extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd,
121 unsigned long arg);
122 extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
123 struct dn_kern_rta *rta,
124 const struct nlmsghdr *nlh, int *errp);
125 extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
126 const struct flowi *fl,
127 struct dn_fib_res *res);
128 extern void dn_fib_release_info(struct dn_fib_info *fi);
129 extern u16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
130 extern void dn_fib_flush(void);
131 extern void dn_fib_select_multipath(const struct flowi *fl,
132 struct dn_fib_res *res);
133 extern int dn_fib_sync_down(dn_address local, struct net_device *dev,
134 int force);
135 extern int dn_fib_sync_up(struct net_device *dev);
136
137 /*
138 * dn_tables.c
139 */
140 extern struct dn_fib_table *dn_fib_get_table(int n, int creat);
141 extern struct dn_fib_table *dn_fib_empty_table(void);
142 extern void dn_fib_table_init(void);
143 extern void dn_fib_table_cleanup(void);
144
145 /*
146 * dn_rules.c
147 */
148 extern void dn_fib_rules_init(void);
149 extern void dn_fib_rules_cleanup(void);
150 extern void dn_fib_rule_put(struct dn_fib_rule *);
151 extern __u16 dn_fib_rules_policy(__u16 saddr, struct dn_fib_res *res, unsigned *flags);
152 extern unsigned dnet_addr_type(__u16 addr);
153 extern int dn_fib_lookup(const struct flowi *fl, struct dn_fib_res *res);
154
155 /*
156 * rtnetlink interface
157 */
158 extern int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
159 extern int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
160 extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
161
162 extern int dn_fib_rtm_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
163 extern int dn_fib_rtm_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
164 extern int dn_fib_dump_rules(struct sk_buff *skb, struct netlink_callback *cb);
165
166 extern void dn_fib_free_info(struct dn_fib_info *fi);
167
168 static inline void dn_fib_info_put(struct dn_fib_info *fi)
169 {
170 if (atomic_dec_and_test(&fi->fib_clntref))
171 dn_fib_free_info(fi);
172 }
173
174 static inline void dn_fib_res_put(struct dn_fib_res *res)
175 {
176 if (res->fi)
177 dn_fib_info_put(res->fi);
178 if (res->r)
179 dn_fib_rule_put(res->r);
180 }
181
182 extern struct dn_fib_table *dn_fib_tables[];
183
184 #else /* Endnode */
185
186 #define dn_fib_init() do { } while(0)
187 #define dn_fib_cleanup() do { } while(0)
188
189 #define dn_fib_lookup(fl, res) (-ESRCH)
190 #define dn_fib_info_put(fi) do { } while(0)
191 #define dn_fib_select_multipath(fl, res) do { } while(0)
192 #define dn_fib_rules_policy(saddr,res,flags) (0)
193 #define dn_fib_res_put(res) do { } while(0)
194
195 #endif /* CONFIG_DECNET_ROUTER */
196
197 static inline u16 dnet_make_mask(int n)
198 {
199 if (n)
200 return htons(~((1<<(16-n))-1));
201 return 0;
202 }
203
204 #endif /* _NET_DN_FIB_H */
205
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