netfilter: ipset: Add support for new bitmask parameter

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Add a new parameter to complement the existing 'netmask' option. The
main difference between netmask and bitmask is that bitmask takes any
arbitrary ip address as input, it does not have to be a valid netmask.

The name of the new parameter is 'bitmask'. This lets us mask out
arbitrary bits in the ip address, for example:
ipset create set1 hash:ip bitmask 255.128.255.0
ipset create set2 hash:ip,port family inet6 bitmask ffff::ff80

Signed-off-by: Vishwanath Pai <vpai@akamai.com>
Signed-off-by: Joshua Hunt <johunt@akamai.com>
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

...

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Vishwanath Pai 2022-11-22 20:30:57 +01:00 • committed by Pablo Neira Ayuso

parent a70e483460

commit e937452495

6 changed files with 126 additions and 26 deletions

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include/uapi/linux/netfilter/ipset/ip_set.h

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