Add routing peer support (#441)

Handle routes updates from management

Manage routing firewall rules

Manage peer RIB table

Add get peer and get notification channel from the status recorder

Update interface peers allowed IPs

client/internal/routemanager/systemops_test.go

@@ -0,0 +1,68 @@
+package routemanager
+
+import (
+	"fmt"
+	"github.com/netbirdio/netbird/iface"
+	"github.com/stretchr/testify/require"
+	"net/netip"
+	"testing"
+)
+
+func TestAddRemoveRoutes(t *testing.T) {
+	testCases := []struct {
+		name                   string
+		prefix                 netip.Prefix
+		shouldRouteToWireguard bool
+		shouldBeRemoved        bool
+	}{
+		{
+			name:                   "Should Add And Remove Route",
+			prefix:                 netip.MustParsePrefix("100.66.120.0/24"),
+			shouldRouteToWireguard: true,
+			shouldBeRemoved:        true,
+		},
+		{
+			name:                   "Should Not Add Or Remove Route",
+			prefix:                 netip.MustParsePrefix("127.0.0.1/32"),
+			shouldRouteToWireguard: false,
+			shouldBeRemoved:        false,
+		},
+	}
+
+	for n, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			wgInterface, err := iface.NewWGIFace(fmt.Sprintf("utun53%d", n), "100.65.75.2/24", iface.DefaultMTU)
+			require.NoError(t, err, "should create testing WGIface interface")
+			defer wgInterface.Close()
+
+			err = wgInterface.Create()
+			require.NoError(t, err, "should create testing wireguard interface")
+
+			err = addToRouteTableIfNoExists(testCase.prefix, wgInterface.GetAddress().IP.String())
+			require.NoError(t, err, "should not return err")
+
+			prefixGateway, err := getExistingRIBRouteGateway(testCase.prefix)
+			require.NoError(t, err, "should not return err")
+			if testCase.shouldRouteToWireguard {
+				require.Equal(t, wgInterface.GetAddress().IP.String(), prefixGateway.String(), "route should point to wireguard interface IP")
+			} else {
+				require.NotEqual(t, wgInterface.GetAddress().IP.String(), prefixGateway.String(), "route should point to a different interface")
+			}
+
+			err = removeFromRouteTableIfNonSystem(testCase.prefix, wgInterface.GetAddress().IP.String())
+			require.NoError(t, err, "should not return err")
+
+			prefixGateway, err = getExistingRIBRouteGateway(testCase.prefix)
+			require.NoError(t, err, "should not return err")
+
+			internetGateway, err := getExistingRIBRouteGateway(netip.MustParsePrefix("0.0.0.0/0"))
+			require.NoError(t, err)
+
+			if testCase.shouldBeRemoved {
+				require.Equal(t, internetGateway, prefixGateway, "route should be pointing to default internet gateway")
+			} else {
+				require.NotEqual(t, internetGateway, prefixGateway, "route should be pointing to a different gateway than the internet gateway")
+			}
+		})
+	}
+}