TCP_PINGPONG_THRESH 318 include/net/inet_connection_sock.h inet_csk(sk)->icsk_ack.pingpong = TCP_PINGPONG_THRESH; TCP_PINGPONG_THRESH 328 include/net/inet_connection_sock.h return inet_csk(sk)->icsk_ack.pingpong >= TCP_PINGPONG_THRESH;