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	void			void
	ip6_input(struct mbuf *m)			ip6_input(struct mbuf *m)
	{			{
	struct in6_addr odst;			struct in6_addr odst;
	struct ip6_hdr *ip6;			struct ip6_hdr *ip6;
	struct in6_ifaddr *ia;			struct in6_ifaddr *ia;
	struct ifnet *rcvif;			struct ifnet *rcvif;
				struct nd_ifinfo *ndi;
	u_int32_t plen;			u_int32_t plen;
	u_int32_t rtalert = ~0;			u_int32_t rtalert = ~0;
	int off = sizeof(struct ip6_hdr), nest;			int off = sizeof(struct ip6_hdr), nest;
	int nxt, ours = 0;			int nxt, ours = 0;
	int srcrt = 0;			int srcrt = 0;

	/*			/*
	* Drop the packet if IPv6 operation is disabled on the interface.			* Drop the packet if IPv6 operation is disabled on the interface.
	*/			*/
	rcvif = m->m_pkthdr.rcvif;			rcvif = m->m_pkthdr.rcvif;
	if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED))			if ((ndi = nd6_ifinfo(rcvif)) == NULL \|\|
				(ndi->flags & ND6_IFF_IFDISABLED) != 0)
	goto bad;			goto bad;

	#if defined(IPSEC) \|\| defined(IPSEC_SUPPORT)			#if defined(IPSEC) \|\| defined(IPSEC_SUPPORT)
	/*			/*
	* should the inner packet be considered authentic?			* should the inner packet be considered authentic?
	* see comment in ah4_input().			* see comment in ah4_input().
	* NB: m cannot be NULL when passed to the input routine			* NB: m cannot be NULL when passed to the input routine
	*/			*/
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