include/net/dn_fib.h

   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
  10 struct 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
  26 struct 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
  35 struct 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
  44 struct 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
  54 struct 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
  77 typedef struct {
  78         u16     datum;
  79 } dn_fib_key_t;
  80
  81 typedef struct {
  82         u16     datum;
  83 } dn_fib_hash_t;
  84
  85 typedef struct {
  86         u16     datum;
  87 } dn_fib_idx_t;
  88
  89 struct 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
 100 struct 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 #ifdef CONFIG_RTNETLINK
 117         int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
 118 #endif /* CONFIG_RTNETLINK */
 119
 120         unsigned char data[0];
 121 };
 122
 123
 124 /*
 125  * dn_fib.c
 126  */
 127 extern void dn_fib_init(void);
 128 extern void dn_fib_cleanup(void);
 129
 130 extern int dn_fib_rt_message(struct sk_buff *skb);
 131 extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd,
 132                         unsigned long arg);
 133 extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
 134                                 struct dn_kern_rta *rta,
 135                                 const struct nlmsghdr *nlh, int *errp);
 136 extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
 137                         const struct dn_fib_key *key, struct dn_fib_res *res);
 138 extern void dn_fib_release_info(struct dn_fib_info *fi);
 139 extern u16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
 140 extern void dn_fib_flush(void);
 141 extern void dn_fib_select_multipath(const struct dn_fib_key *key,
 142                                         struct dn_fib_res *res);
 143 extern int dn_fib_sync_down(dn_address local, struct net_device *dev,
 144                                 int force);
 145 extern int dn_fib_sync_up(struct net_device *dev);
 146
 147 /*
 148  * dn_tables.c
 149  */
 150 extern struct dn_fib_table *dn_fib_get_table(int n, int creat);
 151 extern struct dn_fib_table *dn_fib_empty_table(void);
 152 extern void dn_fib_table_init(void);
 153 extern void dn_fib_table_cleanup(void);
 154
 155 /*
 156  * dn_rules.c
 157  */
 158 extern void dn_fib_rules_init(void);
 159 extern void dn_fib_rules_cleanup(void);
 160 extern void dn_fib_rule_put(struct dn_fib_rule *);
 161 extern int dn_fib_lookup(struct dn_fib_key *key, struct dn_fib_res *res);
 162
 163 /*
 164  * rtnetlink interface
 165  */
 166 #ifdef CONFIG_RTNETLINK
 167 extern int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
 168 extern int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
 169 extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
 170
 171 extern int dn_fib_rtm_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
 172 extern int dn_fib_rtm_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
 173 extern int dn_fib_dump_rules(struct sk_buff *skb, struct netlink_callback *cb);
 174 #endif /* CONFIG_RTNETLINK */
 175
 176 #define DN_NUM_TABLES 255
 177 #define DN_MIN_TABLE 1
 178 #define DN_DEFAULT_TABLE 1
 179 #define DN_L1_TABLE 1
 180 #define DN_L2_TABLE 2
 181
 182 extern void dn_fib_free_info(struct dn_fib_info *fi);
 183
 184 static __inline__ void dn_fib_info_put(struct dn_fib_info *fi)
 185 {
 186         if (atomic_dec_and_test(&fi->fib_clntref))
 187                 dn_fib_free_info(fi);
 188 }
 189
 190 static __inline__ void dn_fib_res_put(struct dn_fib_res *res)
 191 {
 192         if (res->fi)
 193                 dn_fib_info_put(res->fi);
 194         if (res->r)
 195                 dn_fib_rule_put(res->r);
 196 }
 197
 198 static __inline__ u16 dnet_make_mask(int n)
 199 {
 200         if (n)
 201                 return htons(~((1<<(16-n))-1));
 202         return 0;
 203 }
 204
 205 #endif /* CONFIG_DECNET_ROUTER */
 206
 207 #endif /* _NET_DN_FIB_H */