74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
package routing
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import (
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"fmt"
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"net"
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"github.com/qdm12/gluetun/internal/netlink"
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)
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const (
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inboundTable = 200
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inboundPriority = 100
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)
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func (r *Routing) routeInboundFromDefault(defaultGateway net.IP,
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defaultInterface string) (err error) {
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if err := r.addRuleInboundFromDefault(inboundTable); err != nil {
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return fmt.Errorf("cannot add rule: %w", err)
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}
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defaultDestination := net.IPNet{IP: net.IPv4(0, 0, 0, 0), Mask: net.IPv4Mask(0, 0, 0, 0)}
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if err := r.addRouteVia(defaultDestination, defaultGateway, defaultInterface, inboundTable); err != nil {
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return fmt.Errorf("cannot add route: %w", err)
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}
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return nil
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}
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func (r *Routing) unrouteInboundFromDefault(defaultGateway net.IP,
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defaultInterface string) (err error) {
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defaultDestination := net.IPNet{IP: net.IPv4(0, 0, 0, 0), Mask: net.IPv4Mask(0, 0, 0, 0)}
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if err := r.deleteRouteVia(defaultDestination, defaultGateway, defaultInterface, inboundTable); err != nil {
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return fmt.Errorf("cannot delete route: %w", err)
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}
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if err := r.delRuleInboundFromDefault(inboundTable); err != nil {
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return fmt.Errorf("cannot delete rule: %w", err)
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}
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return nil
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}
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func (r *Routing) addRuleInboundFromDefault(table int) (err error) {
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defaultIP, err := r.DefaultIP()
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if err != nil {
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return fmt.Errorf("cannot find default IP: %w", err)
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}
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defaultIPMasked32 := netlink.NewIPNet(defaultIP)
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ruleDstNet := (*net.IPNet)(nil)
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err = r.addIPRule(defaultIPMasked32, ruleDstNet, table, inboundPriority)
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if err != nil {
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return fmt.Errorf("cannot add rule: %w", err)
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}
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return nil
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}
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func (r *Routing) delRuleInboundFromDefault(table int) (err error) {
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defaultIP, err := r.DefaultIP()
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if err != nil {
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return fmt.Errorf("cannot find default IP: %w", err)
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}
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defaultIPMasked32 := netlink.NewIPNet(defaultIP)
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ruleDstNet := (*net.IPNet)(nil)
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err = r.deleteIPRule(defaultIPMasked32, ruleDstNet, table, inboundPriority)
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if err != nil {
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return fmt.Errorf("cannot delete rule: %w", err)
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}
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return nil
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}
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