clash/component/dialer/bind.go

51 lines
1.1 KiB
Go

package dialer
import (
"net"
"net/netip"
"strings"
"github.com/Dreamacro/clash/component/iface"
)
func LookupLocalAddrFromIfaceName(ifaceName string, network string, destination netip.Addr, port int) (net.Addr, error) {
ifaceObj, err := iface.ResolveInterface(ifaceName)
if err != nil {
return nil, err
}
var addr *netip.Prefix
switch network {
case "udp4", "tcp4":
addr, err = ifaceObj.PickIPv4Addr(destination)
case "tcp6", "udp6":
addr, err = ifaceObj.PickIPv6Addr(destination)
default:
if destination.IsValid() {
if destination.Is4() || destination.Is4In6() {
addr, err = ifaceObj.PickIPv4Addr(destination)
} else {
addr, err = ifaceObj.PickIPv6Addr(destination)
}
} else {
addr, err = ifaceObj.PickIPv4Addr(destination)
}
}
if err != nil {
return nil, err
}
if strings.HasPrefix(network, "tcp") {
return &net.TCPAddr{
IP: addr.Addr().AsSlice(),
Port: port,
}, nil
} else if strings.HasPrefix(network, "udp") {
return &net.UDPAddr{
IP: addr.Addr().AsSlice(),
Port: port,
}, nil
}
return nil, iface.ErrAddrNotFound
}