46 lines
955 B
Go
46 lines
955 B
Go
package dialer
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import (
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"context"
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"net"
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"net/netip"
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"syscall"
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"golang.org/x/sys/unix"
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)
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func bindControl(ifaceName string) controlFn {
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return func(ctx context.Context, network, address string, c syscall.RawConn) (err error) {
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addrPort, err := netip.ParseAddrPort(address)
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if err == nil && !addrPort.Addr().IsGlobalUnicast() {
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return
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}
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var innerErr error
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err = c.Control(func(fd uintptr) {
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innerErr = unix.BindToDevice(int(fd), ifaceName)
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})
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if innerErr != nil {
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err = innerErr
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}
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return
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}
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}
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func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ netip.Addr) error {
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addControlToDialer(dialer, bindControl(ifaceName))
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return nil
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}
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func bindIfaceToListenConfig(ifaceName string, lc *net.ListenConfig, _, address string) (string, error) {
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addControlToListenConfig(lc, bindControl(ifaceName))
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return address, nil
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}
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func ParseNetwork(network string, addr netip.Addr) string {
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return network
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}
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