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| author |   Eric Dumazet <edumazet@google.com> | 2019-10-01 10:49:06 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-10-01 13:07:53 -0700 |
| commit | be2644aac3e1db02d09f45d56206bbdafca582a2 (patch) | |
| tree | 36976d22af2d893c45cfb0e06cf651fcb5cc8028 /include/net/ipv6.h | |
| parent | net: core: dev: replace state xoff flag comparison by netif_xmit_stopped method (diff) | |
| download | linux-dev-be2644aac3e1db02d09f45d56206bbdafca582a2.tar.xz linux-dev-be2644aac3e1db02d09f45d56206bbdafca582a2.zip | |
tcp: add ipv6_addr_v4mapped_loopback() helper
tcp_twsk_unique() has a hard coded assumption about ipv4 loopback
being 127/8
Lets instead use the standard ipv4_is_loopback() method,
in a new ipv6_addr_v4mapped_loopback() helper.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 009605c56f20..d04b7abe2a4c 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -696,6 +696,11 @@ static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) cpu_to_be32(0x0000ffff))) == 0UL; } +static inline bool ipv6_addr_v4mapped_loopback(const struct in6_addr *a) +{ + return ipv6_addr_v4mapped(a) && ipv4_is_loopback(a->s6_addr32[3]); +} + static inline u32 ipv6_portaddr_hash(const struct net *net, const struct in6_addr *addr6, unsigned int port) |