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net: ipv6/addrconf: ensure that regen_advance is at least 2 seconds

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RFC 8981 defines REGEN_ADVANCE as follows:

REGEN_ADVANCE = 2 + (TEMP_IDGEN_RETRIES * DupAddrDetectTransmits * RetransTimer / 1000)

Thus, allowing it to be less than 2 seconds is technically a protocol
violation.

Link: https://datatracker.ietf.org/doc/html/rfc8981#name-defined-protocol-parameters
Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Alex Henrie
2024-02-13 23:26:30 -07:00
committed by Paolo Abeni
parent ea578703b0
commit 2aa8f155b0
2 changed files with 11 additions and 8 deletions
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4
Documentation/networking/ip-sysctl.rst
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@@ -2503,7 +2503,7 @@ use_tempaddr - INTEGER
temp_valid_lft - INTEGER
valid lifetime (in seconds) for temporary addresses. If less than the
minimum required lifetime (typically 5 seconds), temporary addresses
minimum required lifetime (typically 5-7 seconds), temporary addresses
will not be created.
Default: 172800 (2 days)
@@ -2511,7 +2511,7 @@ temp_valid_lft - INTEGER
temp_prefered_lft - INTEGER
Preferred lifetime (in seconds) for temporary addresses. If
temp_prefered_lft is less than the minimum required lifetime (typically
5 seconds), temporary addresses will not be created. If
5-7 seconds), temporary addresses will not be created. If
temp_prefered_lft is greater than temp_valid_lft, the preferred lifetime
is temp_valid_lft.