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Hi, I have placed a netfilter hook in which I grab the packets in the pre-routing stage. I need to send ICMP messages in response to certain messages in this hook. I looked at alloc_skb(), skb_reserve() and skb_put() functions but it is still not clear to me as to how to construct the packets using these methods. Since I am getting the packets in the Pre-routing stage should I explicitly construct the MAC header, IP header & data & ICMP message? Also, I'll need to calculate the checksum to be transmitted in the ICMP packet...which method could I use to do that? Any help will be really appreciated! Thanks and regards, Rajat. http://rajatswarup.blogspot.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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