+ "Send periodic keepalives. If peer does not respond, we get SIGPIPE.")
+ #+linux (:integer tcp-keepcnt "TCP_KEEPCNT"
+ "Number of unacknowledged probes before the connection is considered dead.")
+ #+linux (:integer tcp-keepidle "TCP_KEEPIDLE"
+ "Seconds between the last data packet sent and the first keepalive probe.")
+ #+linux (:integer tcp-keepintvl "TCP_KEEPINTVL" "Seconds between keepalive probes.")