35 lines
1.0 KiB
Go
35 lines
1.0 KiB
Go
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package routing
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import (
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"net"
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"fmt"
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)
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func (r *routing) AddRoutesVia(subnets []net.IPNet, defaultGateway net.IP, defaultInterface string) error {
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for _, subnet := range subnets {
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exists, err := r.routeExists(subnet)
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if err != nil {
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return err
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} else if exists { // thanks to @npawelek https://github.com/npawelek
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if err := r.removeRoute(subnet); err != nil {
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return err
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}
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}
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r.logger.Info("adding %s as route via %s", subnet.String(), defaultInterface)
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output, err := r.commander.Run("ip", "route", "add", subnet.String(), "via", defaultGateway.String(), "dev", defaultInterface)
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if err != nil {
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return fmt.Errorf("cannot add route for %s via %s %s %s: %s: %w", subnet.String(), defaultGateway.String(), "dev", defaultInterface, output, err)
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}
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}
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return nil
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}
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func (r *routing) removeRoute(subnet net.IPNet) (err error) {
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output, err := r.commander.Run("ip", "route", "del", subnet.String())
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if err != nil {
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return fmt.Errorf("cannot delete route for %s: %s: %w", subnet.String(), output, err)
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}
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return nil
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}
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