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Alexander Aring authored
This patch adds a static inline function ipv6_addr_prefix_copy which copies a ipv6 address prefix(argument pfx) into the ipv6 address prefix. The prefix len is given by plen as bits. This function mainly based on ipv6_addr_prefix which copies one address prefix from address into a new ipv6 address destination and zero all other address bits. The difference is that ipv6_addr_prefix_copy don't get a prefix from an ipv6 address, it sets a prefix to an ipv6 address with keeping other address bits. The use case is for context based address compression inside 6LoWPAN IPHC header which keeping ipv6 prefixes inside a context table to lookup address-bits without sending them. Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Acked-by:
Łukasz Duda <lukasz.duda@nordicsemi.no> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by:
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by:
David S. Miller <davem@davemloft.net> Reviewed-by:
Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by:
Alexander Aring <alex.aring@gmail.com> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org>
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