82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
|
package configuration
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"net"
|
||
|
|
)
|
||
|
|
|
||
|
|
// QoL feature to try and detect the best NIC for hyp
|
||
|
|
func getDefaultNIC() (*net.Interface, error) {
|
||
|
|
ifaces, err := net.Interfaces()
|
||
|
|
if err != nil {
|
||
|
|
return nil, fmt.Errorf("failed to get network interfaces on this system: %v", err)
|
||
|
|
}
|
||
|
|
if len(ifaces) < 1 {
|
||
|
|
return nil, fmt.Errorf("this system has no network interfaces: %v", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Just pick one to start
|
||
|
|
selectedIface := ifaces[0]
|
||
|
|
filteredIfaces := make([]net.Interface, 0)
|
||
|
|
|
||
|
|
// Check for ethernet addresses
|
||
|
|
for _, iface := range ifaces {
|
||
|
|
if len(iface.HardwareAddr) == 6 {
|
||
|
|
selectedIface = iface
|
||
|
|
filteredIfaces = append(filteredIfaces, iface)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ifaces = filteredIfaces
|
||
|
|
filteredIfaces = make([]net.Interface, 0)
|
||
|
|
|
||
|
|
// Check for interfaces that are up and not loopbacks
|
||
|
|
for _, iface := range ifaces {
|
||
|
|
if iface.Flags&net.FlagUp != 0 && iface.Flags&net.FlagRunning != 0 && iface.Flags&net.FlagLoopback == 0 {
|
||
|
|
selectedIface = iface
|
||
|
|
filteredIfaces = append(filteredIfaces, iface)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ifaces = filteredIfaces
|
||
|
|
filteredIfaces = make([]net.Interface, 0)
|
||
|
|
|
||
|
|
// Check for interfaces that have IPv4 addresses assigned
|
||
|
|
for _, iface := range ifaces {
|
||
|
|
addresses, err := iface.Addrs()
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
for _, address := range addresses {
|
||
|
|
ip, _, err := net.ParseCIDR(address.String())
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if ip.To4() != nil {
|
||
|
|
selectedIface = iface
|
||
|
|
filteredIfaces = append(filteredIfaces, iface)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ifaces = filteredIfaces
|
||
|
|
filteredIfaces = nil
|
||
|
|
|
||
|
|
// Check for interfaces that have non RFC1918 addresses assigned
|
||
|
|
for _, iface := range ifaces {
|
||
|
|
addresses, err := iface.Addrs()
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
for _, address := range addresses {
|
||
|
|
ip, _, err := net.ParseCIDR(address.String())
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if !ip.IsPrivate() {
|
||
|
|
selectedIface = iface
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return &selectedIface, nil // TBD
|
||
|
|
}
|