net: ipv6: Add sysctl for minimum prefix len acceptable in RIOs.
This commit adds a new sysctl accept_ra_rt_info_min_plen that defines the minimum acceptable prefix length of Route Information Options. The new sysctl is intended to be used together with accept_ra_rt_info_max_plen to configure a range of acceptable prefix lengths. It is useful to prevent misconfigurations from unintentionally blackholing too much of the IPv6 address space (e.g., home routers announcing RIOs for fc00::/7, which is incorrect). Signed-off-by:Joel Scherpelz <jscherpelz@google.com> Acked-by:
Lorenzo Colitti <lorenzo@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
0e4c9f13
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