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Commit ca97a644 authored Jan 20, 2013 by YOSHIFUJI Hideaki / 吉藤英明 Committed by David S. Miller Jan 20, 2013

ipv6: Introduce ipv6_addr_is_solict_mult() to check Solicited Node Multicast Addresses.



Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b27b28cb

include/net/addrconf.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -305,6 +305,14 @@ static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
		return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
		}

		static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
		{
		return (addr->s6_addr32[0] == htonl(0xff020000) &&
		addr->s6_addr32[1] == htonl(0x00000000) &&
		addr->s6_addr32[2] == htonl(0x00000001) &&
		addr->s6_addr[12] == 0xff);
		}

		#ifdef CONFIG_PROC_FS
		extern int if6_proc_init(void);
		extern void if6_proc_exit(void);

net/ipv6/ndisc.c

+1 −5

Original line number	Diff line number	Diff line
		@@ -685,11 +685,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
		* RFC2461 7.1.1:
		* DAD has to be destined for solicited node multicast address.
		*/
		if (dad &&
		!(daddr->s6_addr32[0] == htonl(0xff020000) &&
		daddr->s6_addr32[1] == htonl(0x00000000) &&
		daddr->s6_addr32[2] == htonl(0x00000001) &&
		daddr->s6_addr [12] == 0xff )) {
		if (dad && !ipv6_addr_is_solict_mult(daddr)) {
		ND_PRINTK(2, warn, "NS: bad DAD packet (wrong destination)\n");
		return;
		}