#define TCPTV_KEEP_INIT ( 75*TCP_RETRANSHZ) /* connect keep alive */
#define TCPTV_KEEP_IDLE (120*60*TCP_RETRANSHZ) /* time before probing */
#define TCPTV_KEEPINTVL ( 75*TCP_RETRANSHZ) /* default probe interval */
#define TCPTV_KEEP_INIT ( 75*TCP_RETRANSHZ) /* connect keep alive */
#define TCPTV_KEEP_IDLE (120*60*TCP_RETRANSHZ) /* time before probing */
#define TCPTV_KEEPINTVL ( 75*TCP_RETRANSHZ) /* default probe interval */