ndisc.h
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:3k
- #ifndef _NDISC_H
- #define _NDISC_H
- /*
- * ICMP codes for neighbour discovery messages
- */
- #define NDISC_ROUTER_SOLICITATION 133
- #define NDISC_ROUTER_ADVERTISEMENT 134
- #define NDISC_NEIGHBOUR_SOLICITATION 135
- #define NDISC_NEIGHBOUR_ADVERTISEMENT 136
- #define NDISC_REDIRECT 137
- /*
- * ndisc options
- */
- #define ND_OPT_SOURCE_LL_ADDR 1
- #define ND_OPT_TARGET_LL_ADDR 2
- #define ND_OPT_PREFIX_INFO 3
- #define ND_OPT_REDIRECT_HDR 4
- #define ND_OPT_MTU 5
- #define MAX_RTR_SOLICITATION_DELAY HZ
- #define ND_REACHABLE_TIME (30*HZ)
- #define ND_RETRANS_TIMER HZ
- #define ND_MIN_RANDOM_FACTOR (1/2)
- #define ND_MAX_RANDOM_FACTOR (3/2)
- #ifdef __KERNEL__
- #include <linux/skbuff.h>
- #include <linux/netdevice.h>
- #include <linux/icmpv6.h>
- #include <net/neighbour.h>
- #include <asm/atomic.h>
- extern struct neigh_table nd_tbl;
- struct nd_msg {
- struct icmp6hdr icmph;
- struct in6_addr target;
- __u8 opt[0];
- };
- struct ra_msg {
- struct icmp6hdr icmph;
- __u32 reachable_time;
- __u32 retrans_timer;
- };
- struct nd_opt_hdr {
- __u8 nd_opt_type;
- __u8 nd_opt_len;
- } __attribute__((__packed__));
- struct ndisc_options {
- struct nd_opt_hdr *nd_opt_array[7];
- struct nd_opt_hdr *nd_opt_piend;
- };
- #define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
- #define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR]
- #define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO]
- #define nd_opts_pi_end nd_opt_piend
- #define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR]
- #define nd_opts_mtu nd_opt_array[ND_OPT_MTU]
- extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end);
- extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts);
- extern int ndisc_init(struct net_proto_family *ops);
- extern void ndisc_cleanup(void);
- extern int ndisc_rcv(struct sk_buff *skb);
- extern void ndisc_send_ns(struct net_device *dev,
- struct neighbour *neigh,
- struct in6_addr *solicit,
- struct in6_addr *daddr,
- struct in6_addr *saddr);
- extern void ndisc_send_rs(struct net_device *dev,
- struct in6_addr *saddr,
- struct in6_addr *daddr);
- extern void ndisc_forwarding_on(void);
- extern void ndisc_forwarding_off(void);
- extern void ndisc_send_redirect(struct sk_buff *skb,
- struct neighbour *neigh,
- struct in6_addr *target);
- extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
- struct rt6_info * dflt_rt_lookup(void);
- /*
- * IGMP
- */
- extern int igmp6_init(struct net_proto_family *ops);
- extern void igmp6_cleanup(void);
- extern int igmp6_event_query(struct sk_buff *skb);
- extern int igmp6_event_report(struct sk_buff *skb);
- extern void igmp6_cleanup(void);
- static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
- {
- if (dev)
- return __neigh_lookup(&nd_tbl, addr, dev, 1);
- return NULL;
- }
- #endif /* __KERNEL__ */
- #endif