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authorMaciej Żenczykowski <maze@google.com>2020-03-23 18:10:19 -0700
committerDavid S. Miller <davem@davemloft.net>2020-03-26 20:05:58 -0700
commitc24a77edc9a7ac9b5fea75407f197fe1469262f4 (patch)
tree8eb2e401c256174c4243834655886428b18c150c /include/net/ndisc.h
parenta47ab26b9e4857ae0d476c23ac88c7a20d8462b8 (diff)
ipv6: ndisc: add support for 'PREF64' dns64 prefix identifier
This is trivial since we already have support for the entirely identical (from the kernel's point of view) RDNSS, DNSSL, etc. that also contain opaque data that needs to be passed down to userspace for further processing. As specified in draft-ietf-6man-ra-pref64-09 (while it is still a draft, it is purely waiting on the RFC Editor for cleanups and publishing): PREF64 option contains lifetime and a (up to) 96-bit IPv6 prefix. The 8-bit identifier of the option type as assigned by the IANA is 38. Since we lack DNS64/NAT64/CLAT support in kernel at the moment, thus this option should also be passed on to userland. See: https://tools.ietf.org/html/draft-ietf-6man-ra-pref64-09 https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml#icmpv6-parameters-5 Cc: Erik Kline <ek@google.com> Cc: Jen Linkova <furry@google.com> Cc: Lorenzo Colitti <lorenzo@google.com> Cc: Michael Haro <mharo@google.com> Signed-off-by: Maciej Żenczykowski <maze@google.com> Acked-By: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ndisc.h')
-rw-r--r--include/net/ndisc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 1c61aeb3a1c0..7d107113f988 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -41,6 +41,7 @@ enum {
ND_OPT_DNSSL = 31, /* RFC6106 */
ND_OPT_6CO = 34, /* RFC6775 */
ND_OPT_CAPTIVE_PORTAL = 37, /* RFC7710 */
+ ND_OPT_PREF64 = 38, /* RFC-ietf-6man-ra-pref64-09 */
__ND_OPT_MAX
};