sctp_update_cksum 61 net/ipv4/netfilter/nf_nat_proto_sctp.c crc32 = sctp_update_cksum((u8 *)skb->data, skb_headlen(skb), sctp_update_cksum 90 net/sctp/input.c val = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),