tcp syn

Hi, I regularly receive this kind of warning from my Nagios (dozens per day): WARN - Segments/s (in/out): 18.56/16.02, RST: 0.00/s, SYN failed: 0.08/s, Retransmission rate: 1.23% limit: 1.00%, TCP error rate: 0.00% A few seconds later Nagios informs me that the interface is back to normal...

Hi, I am trying to implement ECN+/Wait algorithm(rfc5562) in the kernel. I need to add enable ECN Echo bit in TCP header while sending SYN packet during connection establishment. I am not able find the code where SYN and ACK packets are handled during connection establishment. Any guidance...