[IPv6] route: Simplify ip6_del_rt()
[linux-2.6.git] / include / net / ip6_route.h
1 #ifndef _NET_IP6_ROUTE_H
2 #define _NET_IP6_ROUTE_H
3
4 #define IP6_RT_PRIO_FW          16
5 #define IP6_RT_PRIO_USER        1024
6 #define IP6_RT_PRIO_ADDRCONF    256
7 #define IP6_RT_PRIO_KERN        512
8 #define IP6_RT_FLOW_MASK        0x00ff
9
10 struct route_info {
11         __u8                    type;
12         __u8                    length;
13         __u8                    prefix_len;
14 #if defined(__BIG_ENDIAN_BITFIELD)
15         __u8                    reserved_h:3,
16                                 route_pref:2,
17                                 reserved_l:3;
18 #elif defined(__LITTLE_ENDIAN_BITFIELD)
19         __u8                    reserved_l:3,
20                                 route_pref:2,
21                                 reserved_h:3;
22 #endif
23         __u32                   lifetime;
24         __u8                    prefix[0];      /* 0,8 or 16 */
25 };
26
27 #ifdef __KERNEL__
28
29 #include <net/flow.h>
30 #include <net/ip6_fib.h>
31 #include <net/sock.h>
32 #include <linux/ip.h>
33 #include <linux/ipv6.h>
34
35 struct pol_chain {
36         int                     type;
37         int                     priority;
38         struct fib6_node        *rules;
39         struct pol_chain        *next;
40 };
41
42 extern struct rt6_info  ip6_null_entry;
43
44 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
45 extern struct rt6_info  ip6_prohibit_entry;
46 extern struct rt6_info  ip6_blk_hole_entry;
47 #endif
48
49 extern int ip6_rt_gc_interval;
50
51 extern void                     ip6_route_input(struct sk_buff *skb);
52
53 extern struct dst_entry *       ip6_route_output(struct sock *sk,
54                                                  struct flowi *fl);
55
56 extern int                      ip6_route_me_harder(struct sk_buff *skb);
57
58 extern void                     ip6_route_init(void);
59 extern void                     ip6_route_cleanup(void);
60
61 extern int                      ipv6_route_ioctl(unsigned int cmd, void __user *arg);
62
63 extern int                      ip6_route_add(struct in6_rtmsg *rtmsg,
64                                               struct nlmsghdr *,
65                                               void *rtattr,
66                                               struct netlink_skb_parms *req,
67                                               u32 table_id);
68 extern int                      ip6_ins_rt(struct rt6_info *,
69                                            struct nlmsghdr *,
70                                            void *rtattr,
71                                            struct netlink_skb_parms *req);
72 extern int                      ip6_del_rt(struct rt6_info *);
73
74 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
75                                                 struct net_device *dev,
76                                                 int anycast);
77
78 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
79                                                 struct net_device *dev);
80
81 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
82                                            struct in6_addr *src,
83                                            struct in6_addr *gw,
84                                            struct net_device *dev, 
85                                            int dstlen, int srclen,
86                                            int metric, __u32 flags);
87
88 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
89                                             struct in6_addr *saddr,
90                                             int oif, int flags);
91
92 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
93                                          struct neighbour *neigh,
94                                          struct in6_addr *addr,
95                                          int (*output)(struct sk_buff *));
96 extern int ndisc_dst_gc(int *more);
97 extern void fib6_force_start_gc(void);
98
99 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
100                                            const struct in6_addr *addr,
101                                            int anycast);
102
103 /*
104  *      support functions for ND
105  *
106  */
107 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
108                                                     struct net_device *dev);
109 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
110                                                     struct net_device *dev,
111                                                     unsigned int pref);
112
113 extern void                     rt6_purge_dflt_routers(void);
114
115 extern int                      rt6_route_rcv(struct net_device *dev,
116                                               u8 *opt, int len,
117                                               struct in6_addr *gwaddr);
118
119 extern void                     rt6_redirect(struct in6_addr *dest,
120                                              struct in6_addr *saddr,
121                                              struct neighbour *neigh,
122                                              u8 *lladdr,
123                                              int on_link);
124
125 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
126                                                    struct in6_addr *saddr,
127                                                    struct net_device *dev,
128                                                    u32 pmtu);
129
130 struct nlmsghdr;
131 struct netlink_callback;
132 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
133 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
134 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
135 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
136
137 struct rt6_rtnl_dump_arg
138 {
139         struct sk_buff *skb;
140         struct netlink_callback *cb;
141 };
142
143 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
144 extern void rt6_ifdown(struct net_device *dev);
145 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
146
147 extern rwlock_t rt6_lock;
148
149 /*
150  *      Store a destination cache entry in a socket
151  */
152 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
153                                    struct in6_addr *daddr)
154 {
155         struct ipv6_pinfo *np = inet6_sk(sk);
156         struct rt6_info *rt = (struct rt6_info *) dst;
157
158         sk_setup_caps(sk, dst);
159         np->daddr_cache = daddr;
160         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
161 }
162
163 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
164                                  struct in6_addr *daddr)
165 {
166         write_lock(&sk->sk_dst_lock);
167         __ip6_dst_store(sk, dst, daddr);
168         write_unlock(&sk->sk_dst_lock);
169 }
170
171 static inline int ipv6_unicast_destination(struct sk_buff *skb)
172 {
173         struct rt6_info *rt = (struct rt6_info *) skb->dst;
174
175         return rt->rt6i_flags & RTF_LOCAL;
176 }
177
178 #endif
179 #endif