Fix #273 (#277), adding FIREWALL_OUTBOUND_SUBNETS

internal/routing/routing.go

@@ -2,25 +2,35 @@ package routing
 
 import (
 	"net"
+	"sync"
 
 	"github.com/qdm12/golibs/logging"
 )
 
 type Routing interface {
+	// Mutations
 	Setup() (err error)
 	TearDown() error
+	SetOutboundRoutes(outboundSubnets []net.IPNet) error
+
+	// Read only
 	DefaultRoute() (defaultInterface string, defaultGateway net.IP, err error)
 	LocalSubnet() (defaultSubnet net.IPNet, err error)
+	DefaultIP() (defaultIP net.IP, err error)
 	VPNDestinationIP() (ip net.IP, err error)
 	VPNLocalGatewayIP() (ip net.IP, err error)
+
+	// Internal state
 	SetVerbose(verbose bool)
 	SetDebug()
 }
 
 type routing struct {
-	logger  logging.Logger
-	verbose bool
-	debug   bool
+	logger          logging.Logger
+	verbose         bool
+	debug           bool
+	outboundSubnets []net.IPNet
+	stateMutex      sync.RWMutex
 }
 
 // NewConfigurator creates a new Configurator instance.