Messages in this thread | | | Date | Fri, 10 Dec 2004 01:54:55 -0800 (PST) | From | cranium2003 <> | Subject | analysing ip_rcv code problems |
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hello, I know that in kernel 2.4 series, function used to receive IP packets is ip_rcv. But i am not getting where exactly IP header is removed that is following lines from function ip_rcv can be used to remove IP header
if (!pskb_may_pull(skb, sizeof(struct iphdr))) goto inhdr_error; iph = skb->nh.iph; ... ... ... ... and also following lines from same kernel is used to remove header as IP header length is 20 bytes then which function actually does IP header removal. if (!pskb_may_pull(skb, iph->ihl*4)) goto inhdr_error; iph = skb->nh.iph; Also why iph = skb->nh.iph statement is used twice in function code ip_rcv. regards, cranium.
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