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

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明 2013-01-20 07:39:00 +00:00 committed by David S. Miller
parent b27b28cb44
commit ca97a644d7
2 changed files with 9 additions and 5 deletions
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8
include/net/addrconf.h
View file

@ -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);

6
net/ipv6/ndisc.c
View file

@ -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;
}