xref: /openbmc/linux/include/net/ndisc.h (revision 643d1f7f)
1 #ifndef _NDISC_H
2 #define _NDISC_H
3 
4 /*
5  *	ICMP codes for neighbour discovery messages
6  */
7 
8 #define NDISC_ROUTER_SOLICITATION	133
9 #define NDISC_ROUTER_ADVERTISEMENT	134
10 #define NDISC_NEIGHBOUR_SOLICITATION	135
11 #define NDISC_NEIGHBOUR_ADVERTISEMENT	136
12 #define NDISC_REDIRECT			137
13 
14 /*
15  *	ndisc options
16  */
17 
18 enum {
19 	__ND_OPT_PREFIX_INFO_END = 0,
20 	ND_OPT_SOURCE_LL_ADDR = 1,	/* RFC2461 */
21 	ND_OPT_TARGET_LL_ADDR = 2,	/* RFC2461 */
22 	ND_OPT_PREFIX_INFO = 3,		/* RFC2461 */
23 	ND_OPT_REDIRECT_HDR = 4,	/* RFC2461 */
24 	ND_OPT_MTU = 5,			/* RFC2461 */
25 	__ND_OPT_ARRAY_MAX,
26 	ND_OPT_ROUTE_INFO = 24,		/* RFC4191 */
27 	ND_OPT_RDNSS = 25,		/* RFC5006 */
28 	__ND_OPT_MAX
29 };
30 
31 #define MAX_RTR_SOLICITATION_DELAY	HZ
32 
33 #define ND_REACHABLE_TIME		(30*HZ)
34 #define ND_RETRANS_TIMER		HZ
35 
36 #define ND_MIN_RANDOM_FACTOR		(1/2)
37 #define ND_MAX_RANDOM_FACTOR		(3/2)
38 
39 #ifdef __KERNEL__
40 
41 #include <linux/compiler.h>
42 #include <linux/icmpv6.h>
43 #include <linux/in6.h>
44 #include <linux/types.h>
45 
46 #include <net/neighbour.h>
47 
48 struct ctl_table;
49 struct file;
50 struct inet6_dev;
51 struct net_device;
52 struct net_proto_family;
53 struct sk_buff;
54 
55 extern struct neigh_table nd_tbl;
56 
57 struct nd_msg {
58         struct icmp6hdr	icmph;
59         struct in6_addr	target;
60 	__u8		opt[0];
61 };
62 
63 struct rs_msg {
64 	struct icmp6hdr	icmph;
65 	__u8		opt[0];
66 };
67 
68 struct ra_msg {
69         struct icmp6hdr		icmph;
70 	__be32			reachable_time;
71 	__be32			retrans_timer;
72 };
73 
74 struct nd_opt_hdr {
75 	__u8		nd_opt_type;
76 	__u8		nd_opt_len;
77 } __attribute__((__packed__));
78 
79 
80 extern int			ndisc_init(struct net_proto_family *ops);
81 
82 extern void			ndisc_cleanup(void);
83 
84 extern int			ndisc_rcv(struct sk_buff *skb);
85 
86 extern void			ndisc_send_ns(struct net_device *dev,
87 					      struct neighbour *neigh,
88 					      struct in6_addr *solicit,
89 					      struct in6_addr *daddr,
90 					      struct in6_addr *saddr);
91 
92 extern void			ndisc_send_rs(struct net_device *dev,
93 					      struct in6_addr *saddr,
94 					      struct in6_addr *daddr);
95 
96 extern void			ndisc_forwarding_on(void);
97 extern void			ndisc_forwarding_off(void);
98 
99 extern void			ndisc_send_redirect(struct sk_buff *skb,
100 						    struct neighbour *neigh,
101 						    struct in6_addr *target);
102 
103 extern int			ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
104 
105 
106 struct rt6_info *		dflt_rt_lookup(void);
107 
108 /*
109  *	IGMP
110  */
111 extern int			igmp6_init(struct net_proto_family *ops);
112 
113 extern void			igmp6_cleanup(void);
114 
115 extern int			igmp6_event_query(struct sk_buff *skb);
116 
117 extern int			igmp6_event_report(struct sk_buff *skb);
118 
119 extern void			igmp6_cleanup(void);
120 
121 #ifdef CONFIG_SYSCTL
122 extern int 			ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
123 							   int write,
124 							   struct file * filp,
125 							   void __user *buffer,
126 							   size_t *lenp,
127 							   loff_t *ppos);
128 #endif
129 
130 extern void 			inet6_ifinfo_notify(int event,
131 						    struct inet6_dev *idev);
132 
133 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
134 {
135 
136 	if (dev)
137 		return __neigh_lookup(&nd_tbl, addr, dev, 1);
138 
139 	return NULL;
140 }
141 
142 
143 #endif /* __KERNEL__ */
144 
145 
146 #endif
147