42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package interfaces
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import "net"
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// InterfaceMatcher is a function type used to match the interfaces we want. See
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// GetInterfacesFunc below for usage.
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type InterfaceMatcher func(net.Interface) bool
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// interfaceGetter is used for testing purposes
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var interfaceGetter = net.Interfaces
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// GetInterfacesFunc loops through the available network interfaces, and returns
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// a list of interfaces for which the passed InterfaceMatcher function returns
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// true.
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func GetInterfacesFunc(matcher InterfaceMatcher) ([]net.Interface, error) {
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ifaces, err := interfaceGetter()
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if err != nil {
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return nil, err
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}
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ret := make([]net.Interface, 0)
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for _, iface := range ifaces {
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if matcher(iface) {
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ret = append(ret, iface)
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}
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}
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return ret, nil
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}
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// GetLoopbackInterfaces returns a list of loopback interfaces.
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func GetLoopbackInterfaces() ([]net.Interface, error) {
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return GetInterfacesFunc(func(iface net.Interface) bool {
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return iface.Flags&net.FlagLoopback != 0
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})
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}
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// GetNonLoopbackInterfaces returns a list of non-loopback interfaces.
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func GetNonLoopbackInterfaces() ([]net.Interface, error) {
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return GetInterfacesFunc(func(iface net.Interface) bool {
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return iface.Flags&net.FlagLoopback == 0
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})
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}
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