+static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off)
+{
+ u32 ret_val = TRANSPORT_INFO_NOT_IP;
+
+ if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) &&
+ (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) {
+ goto not_ip;
+ }
+
+ *trans_off = skb_transport_offset(skb);
+
+ if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) {
+ struct iphdr *iphdr = ip_hdr(skb);
+
+ if (iphdr->protocol == IPPROTO_TCP)
+ ret_val = TRANSPORT_INFO_IPV4_TCP;
+ else if (iphdr->protocol == IPPROTO_UDP)
+ ret_val = TRANSPORT_INFO_IPV4_UDP;
+ } else {
+ if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
+ ret_val = TRANSPORT_INFO_IPV6_TCP;
+ else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
+ ret_val = TRANSPORT_INFO_IPV6_UDP;
+ }
+
+not_ip:
+ return ret_val;
+}
+