tcp_md5_hash_skb_data
void tcp_md5_hash_skb_data(struct md5_ctx *ctx, const struct sk_buff *skb,
tcp_md5_hash_skb_data(ctx, frag_iter, 0);
EXPORT_IPV6_MOD(tcp_md5_hash_skb_data);
tcp_md5_hash_skb_data(&ctx, skb, th->doff << 2);
tcp_md5_hash_skb_data(&ctx, skb, th->doff << 2);