Differential D36649 Diff 111512 sys/netinet6/nd6_nbr.c

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sys/netinet6/nd6_nbr.c

Show First 20 Lines • Show All 459 Lines • ▼ Show 20 Lines	else {
ip6->ip6_dst.s6_addr32[1] = 0;		ip6->ip6_dst.s6_addr32[1] = 0;
ip6->ip6_dst.s6_addr32[2] = IPV6_ADDR_INT32_ONE;		ip6->ip6_dst.s6_addr32[2] = IPV6_ADDR_INT32_ONE;
ip6->ip6_dst.s6_addr32[3] = taddr6->s6_addr32[3];		ip6->ip6_dst.s6_addr32[3] = taddr6->s6_addr32[3];
ip6->ip6_dst.s6_addr8[12] = 0xff;		ip6->ip6_dst.s6_addr8[12] = 0xff;
if (in6_setscope(&ip6->ip6_dst, ifp, NULL) != 0)		if (in6_setscope(&ip6->ip6_dst, ifp, NULL) != 0)
goto bad;		goto bad;
}		}
if (nonce == NULL) {		if (nonce == NULL) {
		char ip6buf[INET6_ADDRSTRLEN];
struct ifaddr *ifa = NULL;		struct ifaddr *ifa = NULL;

/*		/*
* RFC2461 7.2.2:		* RFC2461 7.2.2:
* "If the source address of the packet prompting the		* "If the source address of the packet prompting the
* solicitation is the same as one of the addresses assigned		* solicitation is the same as one of the addresses assigned
* to the outgoing interface, that address SHOULD be placed		* to the outgoing interface, that address SHOULD be placed
* in the IP Source Address of the outgoing solicitation.		* in the IP Source Address of the outgoing solicitation.
* Otherwise, any one of the addresses assigned to the		* Otherwise, any one of the addresses assigned to the
* interface should be used."		* interface should be used."
*		*
* We use the source address for the prompting packet		* We use the source address for the prompting packet
* (saddr6), if saddr6 belongs to the outgoing interface.		* (saddr6), if saddr6 belongs to the outgoing interface.
* Otherwise, we perform the source address selection as usual.		* Otherwise, we perform the source address selection as usual.
*/		*/

if (saddr6 != NULL)		if (saddr6 != NULL)
ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, saddr6);		ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, saddr6);
if (ifa != NULL) {		if (ifa == NULL) {
/* ip6_src set already. */
ip6->ip6_src = *saddr6;
ifa_free(ifa);
} else {
int error;		int error;
struct in6_addr dst6, src6;		struct in6_addr dst6, src6;
uint32_t scopeid;		uint32_t scopeid;

in6_splitscope(&ip6->ip6_dst, &dst6, &scopeid);		in6_splitscope(&ip6->ip6_dst, &dst6, &scopeid);
error = in6_selectsrc_addr(fibnum, &dst6,		error = in6_selectsrc_addr(fibnum, &dst6,
scopeid, ifp, &src6, NULL);		scopeid, ifp, &src6, NULL);
if (error) {		if (error) {
char ip6buf[INET6_ADDRSTRLEN];
nd6log((LOG_DEBUG, "%s: source can't be "		nd6log((LOG_DEBUG, "%s: source can't be "
"determined: dst=%s, error=%d\n", __func__,		"determined: dst=%s, error=%d\n", __func__,
ip6_sprintf(ip6buf, &dst6),		ip6_sprintf(ip6buf, &dst6),
error));		error));
goto bad;		goto bad;
}		}
ip6->ip6_src = src6;		ip6->ip6_src = src6;
		} else
		ip6->ip6_src = *saddr6;

		if (ifp->if_carp != NULL) {
		/*
		* Check that selected source address belongs to
		* CARP addresses.
		*/
		if (ifa == NULL)
		ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp,
		&ip6->ip6_src);
		/*
		* Do not send NS for CARP address if we are not
		* the CARP master.
		*/
		if (ifa != NULL && !(*carp_master_p)(ifa)) {
		log(LOG_DEBUG,
		"nd6_ns_output: NS from BACKUP CARP address %s\n",
		ip6_sprintf(ip6buf, &ip6->ip6_src));
		ifa_free(ifa);
		goto bad;
}		}
		}
		if (ifa != NULL)
		ifa_free(ifa);
} else {		} else {
/*		/*
* Source address for DAD packet must always be IPv6		* Source address for DAD packet must always be IPv6
* unspecified address. (0::0)		* unspecified address. (0::0)
* We actually don't have to 0-clear the address (we did it		* We actually don't have to 0-clear the address (we did it
* above), but we do so here explicitly to make the intention		* above), but we do so here explicitly to make the intention
* clearer.		* clearer.
*/		*/
▲ Show 20 Lines • Show All 193 Lines • ▼ Show 20 Lines	nd6_na_input(struct mbuf *m, int off, int icmp6len)

lladdr = NULL;		lladdr = NULL;
lladdrlen = 0;		lladdrlen = 0;
if (ndopts.nd_opts_tgt_lladdr) {		if (ndopts.nd_opts_tgt_lladdr) {
lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1);		lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1);
lladdrlen = ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3;		lladdrlen = ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3;
}		}

		ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, &taddr6);
		if (ifa != NULL && ifa->ifa_carp != NULL) {
/*		/*
* This effectively disables the DAD check on a non-master CARP		* Silently ignore NAs for CARP addresses if we are not
* address.		* the CARP master.
*/		*/
if (ifp->if_carp)		if (!(*carp_master_p)(ifa)) {
ifa = (*carp_iamatch6_p)(ifp, &taddr6);		log(LOG_DEBUG,
else		"nd6_na_input: NA for BACKUP CARP address %s\n",
ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, &taddr6);		ip6_sprintf(ip6bufs, &taddr6));
		ifa_free(ifa);
		goto freeit;
		}
		}
/*		/*
* Target address matches one of my interface address.		* Target address matches one of my interface address.
*		*
* If my address is tentative, this means that there's somebody		* If my address is tentative, this means that there's somebody
* already using the same address as mine. This indicates DAD failure.		* already using the same address as mine. This indicates DAD failure.
* This is defined in RFC 2462.		* This is defined in RFC 2462.
*		*
* Otherwise, process as defined in RFC 2461.		* Otherwise, process as defined in RFC 2461.
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