71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
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package routing
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import (
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"errors"
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"fmt"
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"net"
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"strconv"
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"github.com/qdm12/gluetun/internal/netlink"
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)
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var (
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errLinkByName = errors.New("cannot obtain link by name")
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)
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func (r *Routing) addRouteVia(destination net.IPNet, gateway net.IP,
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iface string, table int) error {
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destinationStr := destination.String()
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r.logger.Info("adding route for " + destinationStr)
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r.logger.Debug("ip route replace " + destinationStr +
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" via " + gateway.String() +
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" dev " + iface +
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" table " + strconv.Itoa(table))
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link, err := r.netLinker.LinkByName(iface)
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if err != nil {
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return fmt.Errorf("%w: interface %s: %s", errLinkByName, iface, err)
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}
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route := netlink.Route{
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Dst: &destination,
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Gw: gateway,
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LinkIndex: link.Attrs().Index,
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Table: table,
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}
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if err := r.netLinker.RouteReplace(&route); err != nil {
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return fmt.Errorf("%w: for subnet %s at interface %s",
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err, destinationStr, iface)
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}
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return nil
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}
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func (r *Routing) deleteRouteVia(destination net.IPNet, gateway net.IP,
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iface string, table int) (err error) {
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destinationStr := destination.String()
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r.logger.Info("deleting route for " + destinationStr)
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r.logger.Debug("ip route delete " + destinationStr +
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" via " + gateway.String() +
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" dev " + iface +
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" table " + strconv.Itoa(table))
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link, err := r.netLinker.LinkByName(iface)
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if err != nil {
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return fmt.Errorf("%w: for interface %s: %s", errLinkByName, iface, err)
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}
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route := netlink.Route{
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Dst: &destination,
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Gw: gateway,
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LinkIndex: link.Attrs().Index,
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Table: table,
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}
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if err := r.netLinker.RouteDel(&route); err != nil {
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return fmt.Errorf("%w: for subnet %s at interface %s",
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err, destinationStr, iface)
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}
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return nil
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}
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