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| author | Alex Henrie <alexhenrie24@gmail.com> | 2024-02-13 23:26:31 -0700 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-02-15 15:34:40 +0100 |
| commit | a5fcea2d2f790aa90b6e996d411ae2cf8db55186 (patch) | |
| tree | 8d0eaa45f00bfbffc6b6f8e9dd2c08b5521aca1c /include/net | |
| parent | 2aa8f155b09519814e449dc19adacf01fd1367ee (diff) | |
| download | linux-a5fcea2d2f790aa90b6e996d411ae2cf8db55186.tar.gz | |
net: ipv6/addrconf: introduce a regen_min_advance sysctl
In RFC 8981, REGEN_ADVANCE cannot be less than 2 seconds, and the RFC
does not permit the creation of temporary addresses with lifetimes
shorter than that:
> When processing a Router Advertisement with a
> Prefix Information option carrying a prefix for the purposes of
> address autoconfiguration (i.e., the A bit is set), the host MUST
> perform the following steps:
> 5. A temporary address is created only if this calculated preferred
> lifetime is greater than REGEN_ADVANCE time units.
However, some users want to change their IPv6 address as frequently as
possible regardless of the RFC's arbitrary minimum lifetime. For the
benefit of those users, add a regen_min_advance sysctl parameter that
can be set to below or above 2 seconds.
Link: https://datatracker.ietf.org/doc/html/rfc8981
Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/addrconf.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 61ebe723ee4d5..30d6f1e84e465 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -8,8 +8,9 @@ #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ -#define TEMP_VALID_LIFETIME (7*86400) -#define TEMP_PREFERRED_LIFETIME (86400) +#define TEMP_VALID_LIFETIME (7*86400) /* 1 week */ +#define TEMP_PREFERRED_LIFETIME (86400) /* 24 hours */ +#define REGEN_MIN_ADVANCE (2) /* 2 seconds */ #define REGEN_MAX_RETRY (3) #define MAX_DESYNC_FACTOR (600) |