CentOS - May 2015 - help please , How SYN and ACK packets counted by the server(centos)

I have a question about tcp layer of linux kernel. I want, Syn and ack
packages received to server will be counted.

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where total_syn_count and total_ack_count are variables to be defined and
will be increased

Which files to be used ????

tcp_input.c ,tcp_output.c , tcp_ipv4.c

On 05/22/2015 04:36 AM, Ibrahim Celikbilek wrote:
> where total_syn_count and total_ack_count are variables to be defined and
> will be increased
>
> Which files to be used ????
Rather than modifying your kernel, you could just create iptables rules 
that match TCP SYN and ACK packets.  When printed with "iptables -L
-v",
you'll get a count for packets that match.