xref: /openbmc/linux/include/net/ndisc.h (revision 87c2ce3b)
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_MAX
26 };
27 
28 #define MAX_RTR_SOLICITATION_DELAY	HZ
29 
30 #define ND_REACHABLE_TIME		(30*HZ)
31 #define ND_RETRANS_TIMER		HZ
32 
33 #define ND_MIN_RANDOM_FACTOR		(1/2)
34 #define ND_MAX_RANDOM_FACTOR		(3/2)
35 
36 #ifdef __KERNEL__
37 
38 #include <linux/config.h>
39 #include <linux/compiler.h>
40 #include <linux/icmpv6.h>
41 #include <linux/in6.h>
42 #include <linux/types.h>
43 
44 #include <net/neighbour.h>
45 
46 struct ctl_table;
47 struct file;
48 struct inet6_dev;
49 struct net_device;
50 struct net_proto_family;
51 struct sk_buff;
52 
53 extern struct neigh_table nd_tbl;
54 
55 struct nd_msg {
56         struct icmp6hdr	icmph;
57         struct in6_addr	target;
58 	__u8		opt[0];
59 };
60 
61 struct rs_msg {
62 	struct icmp6hdr	icmph;
63 	__u8		opt[0];
64 };
65 
66 struct ra_msg {
67         struct icmp6hdr		icmph;
68 	__u32			reachable_time;
69 	__u32			retrans_timer;
70 };
71 
72 struct nd_opt_hdr {
73 	__u8		nd_opt_type;
74 	__u8		nd_opt_len;
75 } __attribute__((__packed__));
76 
77 
78 extern int			ndisc_init(struct net_proto_family *ops);
79 
80 extern void			ndisc_cleanup(void);
81 
82 extern int			ndisc_rcv(struct sk_buff *skb);
83 
84 extern void			ndisc_send_ns(struct net_device *dev,
85 					      struct neighbour *neigh,
86 					      struct in6_addr *solicit,
87 					      struct in6_addr *daddr,
88 					      struct in6_addr *saddr);
89 
90 extern void			ndisc_send_rs(struct net_device *dev,
91 					      struct in6_addr *saddr,
92 					      struct in6_addr *daddr);
93 
94 extern void			ndisc_forwarding_on(void);
95 extern void			ndisc_forwarding_off(void);
96 
97 extern void			ndisc_send_redirect(struct sk_buff *skb,
98 						    struct neighbour *neigh,
99 						    struct in6_addr *target);
100 
101 extern int			ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
102 
103 
104 struct rt6_info *		dflt_rt_lookup(void);
105 
106 /*
107  *	IGMP
108  */
109 extern int			igmp6_init(struct net_proto_family *ops);
110 
111 extern void			igmp6_cleanup(void);
112 
113 extern int			igmp6_event_query(struct sk_buff *skb);
114 
115 extern int			igmp6_event_report(struct sk_buff *skb);
116 
117 extern void			igmp6_cleanup(void);
118 
119 #ifdef CONFIG_SYSCTL
120 extern int 			ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
121 							   int write,
122 							   struct file * filp,
123 							   void __user *buffer,
124 							   size_t *lenp,
125 							   loff_t *ppos);
126 #endif
127 
128 extern void 			inet6_ifinfo_notify(int event,
129 						    struct inet6_dev *idev);
130 
131 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
132 {
133 
134 	if (dev)
135 		return __neigh_lookup(&nd_tbl, addr, dev, 1);
136 
137 	return NULL;
138 }
139 
140 
141 #endif /* __KERNEL__ */
142 
143 
144 #endif
145