On Mon, Jan 02, 2017 at 01:29:39PM +0100, Davide Caratti wrote:
> unlike what happens with other protcols, conntrack entries are matched by
> SCTP packets even when crc32c is incorrect. Moreover, netfilter 'REJECT'
> target does not generate any ICMP on reception of SCTP packets, because it
> computes RFC 1624 checksum ad compares it with crc32c in the transport
> header, resulting in a systematic mismatch.
>
> The above issues can be resolved by implementing .error() callback in SCTP
> conntrack helper. Patch 1 of this series lets LIBCRC32C be selected with
> NF_CT_PROTO_SCTP, to allow crc32c validation within nf_conntrack. Patch 2
> implements .error() callback in nf_conntrack_l4proto_sctp{4,6}: like other
> protocols do with the Internet Checksum, sctp_error() validates crc32c in
> PREROUTING hook, updates the value of skb->ip_summed and returns the result
> of checksum validation to let conntrack core skip corrupted packets.
Series applied, thanks Davide.
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