taglinefilesource code
tcp_check801net/ipv4/tcp.cth->check = tcp_check(th, len, saddr, daddr,
tcp_check807net/ipv4/tcp.cth->check = tcp_check(th, len, saddr, daddr,
tcp_check1626net/ipv4/tcp_input.cif (tcp_check(th, len, saddr, daddr, skb->csum))