ip6_find_1stfragopt
int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
int err = ip6_find_1stfragopt(skb, &prevhdr);
err = ip6_find_1stfragopt(skb, &prevhdr);
err = ip6_find_1stfragopt(skb, &prevhdr);
EXPORT_SYMBOL(ip6_find_1stfragopt);
err = ip6_find_1stfragopt(skb, &prevhdr);
return ip6_find_1stfragopt(skb, prevhdr);