diff --git a/util/network_utils.go b/util/network_utils.go index a0e482bc..c4c61594 100644 --- a/util/network_utils.go +++ b/util/network_utils.go @@ -36,11 +36,6 @@ func GetValidNetInterfaces() ([]net.Interface, error) { netIfaces := []net.Interface{} for i := range ifaces { - if ifaces[i].Flags&net.FlagPointToPoint != 0 { - // this interface is ppp, we're not interested in this one - continue - } - iface := ifaces[i] netIfaces = append(netIfaces, iface) } @@ -48,7 +43,7 @@ func GetValidNetInterfaces() ([]net.Interface, error) { return netIfaces, nil } -// getValidNetInterfacesMap returns interfaces that are eligible for DNS and WEB only +// GetValidNetInterfacesForWeb returns interfaces that are eligible for DNS and WEB only // we do not return link-local addresses here func GetValidNetInterfacesForWeb() ([]NetInterface, error) { ifaces, err := GetValidNetInterfaces() @@ -101,7 +96,7 @@ func GetValidNetInterfacesForWeb() ([]NetInterface, error) { return netInterfaces, nil } -// Get interface name by its IP address. +// GetInterfaceByIP - Get interface name by its IP address. func GetInterfaceByIP(ip string) string { ifaces, err := GetValidNetInterfacesForWeb() if err != nil { @@ -119,7 +114,7 @@ func GetInterfaceByIP(ip string) string { return "" } -// Get IP address with netmask for the specified interface +// GetSubnet - Get IP address with netmask for the specified interface // Returns an empty string if it fails to find it func GetSubnet(ifaceName string) string { netIfaces, err := GetValidNetInterfacesForWeb() @@ -137,7 +132,7 @@ func GetSubnet(ifaceName string) string { return "" } -// checkPortAvailable is not a cheap test to see if the port is bindable, because it's actually doing the bind momentarily +// CheckPortAvailable - check if TCP port is available func CheckPortAvailable(host string, port int) error { ln, err := net.Listen("tcp", net.JoinHostPort(host, strconv.Itoa(port))) if err != nil { @@ -151,6 +146,7 @@ func CheckPortAvailable(host string, port int) error { return nil } +// CheckPacketPortAvailable - check if UDP port is available func CheckPacketPortAvailable(host string, port int) error { ln, err := net.ListenPacket("udp", net.JoinHostPort(host, strconv.Itoa(port))) if err != nil { @@ -164,7 +160,7 @@ func CheckPacketPortAvailable(host string, port int) error { return err } -// check if error is "address already in use" +// ErrorIsAddrInUse - check if error is "address already in use" func ErrorIsAddrInUse(err error) bool { errOpError, ok := err.(*net.OpError) if !ok {