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| author | Justin Pettit <jpettit@ovn.org> | 2016-06-25 22:22:02 -0700 |
|---|---|---|
| committer | Justin Pettit <jpettit@ovn.org> | 2016-07-19 22:18:35 -0700 |
| commit | 6d1a4f16a412035086aa72201de22616a8283d64 (patch) | |
| tree | df2c82468d03013a4a850d194bfb9444dfb1efe7 /lib | |
| parent | fa7f915c630529616d038c964f251b1d97d6eca9 (diff) | |
| download | openvswitch-6d1a4f16a412035086aa72201de22616a8283d64.tar.gz | |
packets: Add in6_is_lla() function.
Checks whether the supplied IPv6 address is a link local address.
This will have a caller in a future commit.
Signed-off-by: Justin Pettit <jpettit@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/packets.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/packets.h b/lib/packets.h index 0d7cfc878..8f11e2c05 100644 --- a/lib/packets.h +++ b/lib/packets.h @@ -980,6 +980,18 @@ in6_generate_lla(struct eth_addr ea, struct in6_addr *lla) taddr->be16[7] = ea.be16[2]; } +/* Returns true if 'addr' is a link local address. Otherwise, false. */ +static inline bool +in6_is_lla(struct in6_addr *addr) +{ +#ifdef s6_addr32 + return addr->s6_addr32[0] == htonl(0xfe800000) && !(addr->s6_addr32[1]); +#else + return addr->s6_addr[0] == htons(0xfe80) && + !(addr->s6_addr[1] | addr->s6_addr[2] | addr->s6_addr[3]); +#endif +} + static inline void ipv6_multicast_to_ethernet(struct eth_addr *eth, const struct in6_addr *ip6) { |