ipv6: ioam: Distinguish input and output for hop-limit

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This patch anticipates the support for the IOAM insertion inside in-transit
packets, by making a difference between input and output in order to determine
the right value for its hop-limit (inherited from the IPv6 hop-limit).

Input case: happens before ip6_forward, the IPv6 hop-limit is not decremented
yet -> decrement the IOAM hop-limit to reflect the new hop inside the trace.

Output case: happens after ip6_forward, the IPv6 hop-limit has already been
decremented -> keep the same value for the IOAM hop-limit.

Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Justin Iurman 2021-10-03 20:45:36 +02:00 • committed by David S. Miller

parent 9ac936276f

commit 52d0378645

3 changed files with 9 additions and 7 deletions

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include/net/ioam6.h

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