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enable.go
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enable.go
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package routing
import (
"fmt"
)
func (r *Routing) Setup() (err error) {
defaultRoutes, err := r.DefaultRoutes()
if err != nil {
return fmt.Errorf("getting default routes: %w", err)
}
touched := false
defer func() {
if err != nil && touched {
if tearDownErr := r.TearDown(); tearDownErr != nil {
r.logger.Error("cannot reverse routing changes: " + tearDownErr.Error())
}
}
}()
touched = true
err = r.routeInboundFromDefault(defaultRoutes)
if err != nil {
return fmt.Errorf("adding routes for inbound traffic from default IP: %w", err)
}
r.stateMutex.RLock()
outboundSubnets := r.outboundSubnets
r.stateMutex.RUnlock()
if err := r.setOutboundRoutes(outboundSubnets, defaultRoutes); err != nil {
return fmt.Errorf("setting outbound subnets routes: %w", err)
}
return nil
}
func (r *Routing) TearDown() error {
defaultRoutes, err := r.DefaultRoutes()
if err != nil {
return fmt.Errorf("getting default route: %w", err)
}
err = r.unrouteInboundFromDefault(defaultRoutes)
if err != nil {
return fmt.Errorf("removing routes for inbound traffic from default IP: %w", err)
}
if err := r.setOutboundRoutes(nil, defaultRoutes); err != nil {
return fmt.Errorf("setting outbound subnets routes: %w", err)
}
return nil
}