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authorDavide Caratti2020-10-15 18:39:27 +0200
committerJakub Kicinski2020-10-15 11:45:19 -0700
commit346e320cb2103edef709c4466a29140c4a8e527a (patch)
tree405af21ad80b77a0bfda44fa68bbf92051c9c979 /init
parent54086c5a7f159749bc521706bae329cbce3971e9 (diff)
netfilter: nftables: allow re-computing sctp CRC-32C in 'payload' statements
nftables payload statements are used to mangle SCTP headers, but they can only replace the Internet Checksum. As a consequence, nftables rules that mangle sport/dport/vtag in SCTP headers potentially generate packets that are discarded by the receiver, unless the CRC-32C is "offloaded" (e.g the rule mangles a skb having 'ip_summed' equal to 'CHECKSUM_PARTIAL'. Fix this extending uAPI definitions and L4 checksum update function, in a way that userspace programs (e.g. nft) can instruct the kernel to compute CRC-32C in SCTP headers. Also ensure that LIBCRC32C is built if NF_TABLES is 'y' or 'm' in the kernel build configuration. Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'init')
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