akme/get-closer

package protocols

import (
    "fmt"
    "net"
    "time"
)

// TCPPing measures time for openning connection to TCP port
func TCPPing(host string, tcpPort int) time.Duration {
    startTime := time.Now()
    host = fmt.Sprintf("%s:%d", host, tcpPort)
    conn, err := net.Dial("tcp", host)
    endTime := time.Now()
    if err != nil {
        fmt.Println("could not connect to server: ", err)
    }
    defer conn.Close()
    return endTime.Sub(startTime)
}