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authorEric Dumazet <edumazet@google.com>2019-10-01 10:49:06 -0700
committerDavid S. Miller <davem@davemloft.net>2019-10-01 13:07:53 -0700
commitbe2644aac3e1db02d09f45d56206bbdafca582a2 (patch)
tree36976d22af2d893c45cfb0e06cf651fcb5cc8028 /include/net/ipv6.h
parentnet: core: dev: replace state xoff flag comparison by netif_xmit_stopped method (diff)
downloadlinux-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 '')
-rw-r--r--include/net/ipv6.h5
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)