SpoofDPI/util/os.go

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package util
import (
"errors"
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"fmt"
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"os/exec"
"runtime"
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"strconv"
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"strings"
)
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const (
getDefaultNetworkCMD = "networksetup -listnetworkserviceorder | grep" +
" `(route -n get default | grep 'interface' || route -n get -inet6 default | grep 'interface') | cut -d ':' -f2`" +
" -B 1 | head -n 1 | cut -d ' ' -f 2-"
darwinOS = "darwin"
)
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func SetOsProxy(port uint16) error {
if runtime.GOOS != darwinOS {
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return nil
}
network, err := getDefaultNetwork()
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if err != nil {
return err
}
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return setProxy(getProxyTypes(), network, "127.0.0.1", port)
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}
func UnsetOsProxy() error {
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if runtime.GOOS != darwinOS {
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return nil
}
network, err := getDefaultNetwork()
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if err != nil {
return err
}
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return unsetProxy(getProxyTypes(), network)
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}
func getDefaultNetwork() (string, error) {
network, err := exec.Command("sh", "-c", getDefaultNetworkCMD).Output()
if err != nil {
return "", err
} else if len(network) == 0 {
return "", errors.New("no available networks")
}
return strings.TrimSpace(string(network)), nil
}
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func getProxyTypes() []string {
return []string{"webproxy", "securewebproxy"}
}
func setProxy(proxyTypes []string, network, domain string, port uint16) error {
args := []string{"", network, domain, strconv.FormatUint(uint64(port), 10)}
for _, proxyType := range proxyTypes {
args[0] = "-set" + proxyType
if err := networkSetup(args); err != nil {
return fmt.Errorf("setting %s: %w", proxyType, err)
}
}
return nil
}
func unsetProxy(proxyTypes []string, network string) error {
args := []string{"", network, "off"}
for _, proxyType := range proxyTypes {
args[0] = "-set" + proxyType + "state"
if err := networkSetup(args); err != nil {
return fmt.Errorf("unsetting %s: %w", proxyType, err)
}
}
return nil
}
func networkSetup(args []string) error {
cmd := exec.Command("networksetup", args...)
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("%s: %s", cmd.String(), out)
}
return nil
}