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netlink: handle capped extended acknowledgements - #322
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With NETLINK_CAP_ACK, the kernel echoes only the request's nlmsghdr but leaves its length unchanged, so the TLVs were looked for past where they are. Skip just the header when NLM_F_CAPPED is set.
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With NETLINK_CAP_ACK, the kernel echoes only the request's nlmsghdr but leaves its length unchanged, so the TLVs were looked for past where they are. Skip just the header when NLM_F_CAPPED is set.