Hi,I really do not know that is it correctly of asking such a foolish question in this high-level mailing list,but i could not find the answer by google it. As a recruit,i'm now studying netfilter,i want to write a simply test kernel module by the function of dropping the packet which the protocol is TCP.For that i have read the "Using Netfilter hooks"(http://www.topsight.net/article.php/2003050621055083/print),in the page there is a piece of code below: static int check_tcp_packet(struct sk_buff *skb) { /*........................*/ if (skb->nh.iph->protocol != IPPROTO_TCP) { return NF_ACCEPT; } /*................*/ } But when i look up the source code of the kernel of 2.6.32,the sk_buff has changed.It is not a nh,the name is "network_header",as the others are "transport_header" and "mac_header".Then i found that the "network_header" is just a sk_buff_data_t(the true is a "unsigned int" or "unsigned char *") type variable. So, my question is how to get a IP packet with it protocol or tcp flags or someother things by the "network_header" variable in the struct sk_buff. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
