drivers/virtualbox/network.go
func listHostInterfaces(hif HostInterfaces, excludeNets map[string]*hostOnlyNetwork) (map[string]*net.IPNet, error) {
	ifaces, err := hif.Interfaces()
	if err != nil {
		return nil, err
	}
	m := map[string]*net.IPNet{}

	for _, iface := range ifaces {
		addrs, err := hif.Addrs(&iface)
		if err != nil {
			return nil, err
		}

		// Check if an address of the interface is in the list of excluded addresses
		ifaceExcluded := false
		for _, a := range addrs {
			switch ipnet := a.(type) {
			case *net.IPNet:
				_, excluded := excludeNets[ipnet.String()]
				if excluded {
					ifaceExcluded = true
					break
				}
			}
		}

		// If excluded, or not up, or a loopback interface, skip the interface
		if ifaceExcluded || iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
			continue
		}

		// This is a host interface, so add all its addresses to the map
		for _, a := range addrs {
			switch ipnet := a.(type) {
			case *net.IPNet:
				m[ipnet.String()] = ipnet
			}
		}
	}
	return m, nil
}
func listHostInterfaces(hif HostInterfaces, excludeNets map[string]*hostOnlyNetwork) (map[string]*net.IPNet, error) {
	ifaces, err := hif.Interfaces()
	if err != nil {
		return nil, err
	}
	m := map[string]*net.IPNet{}

	for _, iface := range ifaces {
		addrs, err := hif.Addrs(&iface)
		if err != nil {
			return nil, err
		}

		// Check if an address of the interface is in the list of excluded addresses
		ifaceExcluded := false
		for _, a := range addrs {
			switch ipnet := a.(type) {
			case *net.IPNet:
				_, excluded := excludeNets[ipnet.String()]
				if excluded {
					ifaceExcluded = true
					break
				}
			}
		}

		// If excluded, or not up, or a loopback interface, skip the interface
		if ifaceExcluded || iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
			continue
		}

		// This is a host interface, so add all its addresses to the map
		for _, a := range addrs {
			switch ipnet := a.(type) {
			case *net.IPNet:
				m[ipnet.String()] = ipnet
			}
		}
	}
	return m, nil
}
func listHostInterfaces ( hif HostInterfaces , excludeNets map [ string ] * hostOnlyNetwork ) ( map [ string ] * net . IPNet , error ) { ifaces , err := hif . Interfaces ( ) if err != nil { return nil , err } m := map [ string ] * net . IPNet { } for _ , iface := range ifaces { addrs , err := hif . Addrs ( & iface ) if err != nil { return nil , err } // Check if an address of the interface is in the list of excluded addresses ifaceExcluded := false for _ , a := range addrs { switch ipnet := a . ( type ) { case * net . IPNet : _ , excluded := excludeNets [ ipnet . String ( ) ] if excluded { ifaceExcluded = true break } } } // If excluded, or not up, or a loopback interface, skip the interface if ifaceExcluded || iface . Flags & net . FlagUp == 0 || iface . Flags & net . FlagLoopback != 0 { continue } // This is a host interface, so add all its addresses to the map for _ , a := range addrs { switch ipnet := a . ( type ) { case * net . IPNet : m [ ipnet . String ( ) ] = ipnet } } } return m , nil }
// listHostInterfaces returns a map of net.IPNet addresses of host interfaces that are "UP" and not loopback adapters
// and not virtualbox host-only networks (given by excludeNets), keyed by CIDR string.
listHostInterfaces returns a map of net . IPNet addresses of host interfaces that are UP and not loopback adapters and not virtualbox host - only networks ( given by excludeNets ) keyed by CIDR string .