mirror of
https://github.com/xjasonlyu/tun2socks.git
synced 2025-10-05 16:56:54 +08:00
33 lines
707 B
Go
33 lines
707 B
Go
package dialer
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import (
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"net"
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"syscall"
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"golang.org/x/sys/unix"
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)
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func bindToInterface(i *net.Interface) controlFunc {
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return func(network, address string, c syscall.RawConn) (err error) {
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host, _, _ := net.SplitHostPort(address)
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if ip := net.ParseIP(host); ip != nil && !ip.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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switch network {
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case "tcp4", "udp4":
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innerErr = unix.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_BOUND_IF, i.Index)
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case "tcp6", "udp6":
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innerErr = unix.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_BOUND_IF, i.Index)
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}
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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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