Hi, in the 2.4 net/ipv4/netfilter directory various ways are used to check whether an skb needs to be copied before it is modified. At least three ways are used: if (skb_shared(skb) || skb_cloned(skb)) if (skb_cloned(skb) && !skb->sk) if (skb_cloned(skb)) And at the places where the skb is actually copied some of them do: if ((oldskb)->sk) skb_set_owner_w(newskb, oldskb->sk); while some of them do not. What is the correct way to know if an skb needs to be copied before modified, and what should be done after a copy takes place? //Marcus -- ---------------------------------------+-------------------------- Marcus Sundberg <marcus@xxxxxxxxxx> | Firewalls with SIP & NAT Software Developer, Ingate Systems AB | http://www.ingate.com/ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
