Files
Viktor Liu 55126f990c [client] Use native windows sock opts to avoid routing loops (#4314)
- Move `util/grpc` and `util/net` to `client` so `internal` packages can be accessed
 - Add methods to return the next best interface after the NetBird interface.
- Use `IP_UNICAST_IF` sock opt to force the outgoing interface for the NetBird `net.Dialer` and `net.ListenerConfig` to avoid routing loops. The interface is picked by the new route lookup method.
- Some refactoring to avoid import cycles
- Old behavior is available through `NB_USE_LEGACY_ROUTING=true` env var
2025-09-20 09:31:04 +02:00

20 lines
381 B
Go

package util
import (
"fmt"
"net"
"net/netip"
)
// GetPrefixFromIP returns a netip.Prefix from a net.IP address.
func GetPrefixFromIP(ip net.IP) (netip.Prefix, error) {
addr, ok := netip.AddrFromSlice(ip)
if !ok {
return netip.Prefix{}, fmt.Errorf("parse IP address: %s", ip)
}
addr = addr.Unmap()
prefix := netip.PrefixFrom(addr, addr.BitLen())
return prefix, nil
}