Hello! I made a module that modify a packet using netfilter hooks. But, I don't know how to recompute the checksum. Can you give me some ideas? I tried with: skb -> csum = skb_checksum (skb, 0, skb -> len, 0) but seems that doesn't work (seems hat is not enough). Do I need to compute ip header checksum and tcp header checksum separately? Thank you very much! --- Catalin(ux) BOIE catab@deuroconsult.ro - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html