clash/component/dialer/bind_darwin.go

60 lines
1.4 KiB
Go

package dialer
import (
"net"
"syscall"
"golang.org/x/sys/unix"
"github.com/Dreamacro/clash/component/iface"
)
type controlFn = func(network, address string, c syscall.RawConn) error
func bindControl(ifaceIdx int, chain controlFn) controlFn {
return func(network, address string, c syscall.RawConn) (err error) {
defer func() {
if err == nil && chain != nil {
err = chain(network, address, c)
}
}()
ipStr, _, err := net.SplitHostPort(address)
if err == nil {
ip := net.ParseIP(ipStr)
if ip != nil && !ip.IsGlobalUnicast() {
return
}
}
return c.Control(func(fd uintptr) {
switch network {
case "tcp4", "udp4":
unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_BOUND_IF, ifaceIdx)
case "tcp6", "udp6":
unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, ifaceIdx)
}
})
}
}
func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ net.IP) error {
ifaceObj, err := iface.ResolveInterface(ifaceName)
if err != nil {
return err
}
dialer.Control = bindControl(ifaceObj.Index, dialer.Control)
return nil
}
func bindIfaceToListenConfig(ifaceName string, lc *net.ListenConfig, _, address string) (string, error) {
ifaceObj, err := iface.ResolveInterface(ifaceName)
if err != nil {
return "", err
}
lc.Control = bindControl(ifaceObj.Index, lc.Control)
return address, nil
}