60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
//go:build darwin
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package route
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import (
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"fmt"
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"os/exec"
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"strings"
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)
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// addRoute adds a route via a network interface (macOS route command).
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// route add -inet -net <cidr> -interface <iface>
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func addRoute(cidr, iface string) error {
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return runRoute("add", "-inet", "-net", cidr, "-interface", iface)
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}
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// deleteRoute removes a route via a network interface.
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func deleteRoute(cidr, iface string) error {
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return runRoute("delete", "-inet", "-net", cidr, "-interface", iface)
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}
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// addRouteVia adds a route via a gateway IP.
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func addRouteVia(cidr, gateway string) error {
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return runRoute("add", "-inet", "-net", cidr, gateway)
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}
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// deleteRouteVia removes a route via a gateway IP.
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func deleteRouteVia(cidr, gateway string) error {
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return runRoute("delete", "-inet", "-net", cidr, gateway)
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}
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// defaultGateway returns the current default gateway IP.
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func defaultGateway() (string, error) {
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out, err := exec.Command("route", "-n", "get", "default").Output()
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if err != nil {
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return "", err
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}
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for _, line := range strings.Split(string(out), "\n") {
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line = strings.TrimSpace(line)
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if strings.HasPrefix(line, "gateway:") {
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parts := strings.SplitN(line, ":", 2)
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if len(parts) == 2 {
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gw := strings.TrimSpace(parts[1])
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if gw != "" {
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return gw, nil
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}
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}
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}
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}
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return "", fmt.Errorf("no default gateway found")
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}
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func runRoute(args ...string) error {
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cmd := exec.Command("route", args...)
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if out, err := cmd.CombinedOutput(); err != nil {
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return fmt.Errorf("route %s: %w (%s)", strings.Join(args, " "), err, strings.TrimSpace(string(out)))
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}
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return nil
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}
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