netutils

package module

v0.0.0-...-0aa3ed0 Latest Latest Go to latest Published: Jun 13, 2025 License: MIT Imports: 9 Imported by: 3

Details

Simple packet of pure go functions, that help with work with network

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func CreateTapDevice(name, cidr string) error

CreateTapDevice create tap device, sets cidr to it and up via ip command

func EnableIpv4Forwarding() error

EnableIpv4Forwarding writes 1 to '/proc/sys/net/ipv4/ip_forward'

func FindIPv4(addrs []net.Addr) netip.Addr

FindIPv4 returns first ipv4 in slice of addresses or "0.0.0.0"

func GetDefaultGatewayDevice() string

GetDefaultGateway parses command 'ip route' and return default device name

func GetInterfaceIndex(iface string) int

GetInterfaceIndex returns the index of the network interface with the given name.

func GetInterfaceMTU(name string) (int, error)

GetInterfaceMTU returns mtu from file '/sys/class/net/<interface>/mtu'

func Htons(i uint16) uint16

Htons converts a short (16-bit) integer from host byte order to network byte order.

func OpenRawSocket(name string) (int, error)

OpenRawSocket opens raw socket by name and return its file descriptor

func StopTapDevice(name string) error

StopTapDevice stop tap device by name via ip command

type InterfaceInfo struct {
	Name     string
	HardAddr net.HardwareAddr
	IP       net.IP
}

func GetDefaultGatewayInfo(ifce string) (InterfaceInfo, error)

GetDefaultGatewayInfo gather gateway info by interface name or empty struct

func GetInterfaceInfo(name string) (InterfaceInfo, error)

GetInterfaceInfo gather interface mac and ip address