Hi, wanted to know if udp_hdr/tcp_hdr can be safely used in context of netfilter hooks to extract udp/tcp data from skb? Netfilter is being registered with NF_IP_PRI_FILTER priority. I am facing some issue with using udp_hdr/tcp_hdr on 2.6.32 kernels. It doesn't provide the expected information but skb_header_pointer() seems to work. Not seeing this issue with 3.x/4.x kernels. Regards, Amit