github.com/metacubex/mihomo@v1.18.5/component/dialer/bind_linux.go (about)

     1  package dialer
     2  
     3  import (
     4  	"context"
     5  	"net"
     6  	"net/netip"
     7  	"syscall"
     8  
     9  	"golang.org/x/sys/unix"
    10  )
    11  
    12  func bindControl(ifaceName string) controlFn {
    13  	return func(ctx context.Context, network, address string, c syscall.RawConn) (err error) {
    14  		addrPort, err := netip.ParseAddrPort(address)
    15  		if err == nil && !addrPort.Addr().IsGlobalUnicast() {
    16  			return
    17  		}
    18  
    19  		var innerErr error
    20  		err = c.Control(func(fd uintptr) {
    21  			innerErr = unix.BindToDevice(int(fd), ifaceName)
    22  		})
    23  
    24  		if innerErr != nil {
    25  			err = innerErr
    26  		}
    27  
    28  		return
    29  	}
    30  }
    31  
    32  func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ netip.Addr) error {
    33  	addControlToDialer(dialer, bindControl(ifaceName))
    34  
    35  	return nil
    36  }
    37  
    38  func bindIfaceToListenConfig(ifaceName string, lc *net.ListenConfig, _, address string, rAddrPort netip.AddrPort) (string, error) {
    39  	addControlToListenConfig(lc, bindControl(ifaceName))
    40  
    41  	return address, nil
    42  }
    43  
    44  func ParseNetwork(network string, addr netip.Addr) string {
    45  	return network
    46  }