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Return gateway address if not nil (#533)

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If the gateway address would be nil which is
the case on macOS, we return the preferredSrc

added tests for getExistingRIBRouteGateway function

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This commit is contained in:
Maycon Santos 2022-10-31 11:54:34 +01:00 committed by GitHub
parent 4cdf2df660
commit 126af9dffc
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 49 additions and 3 deletions
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11
client/internal/routemanager/systemops.go
View File

@ -21,7 +21,7 @@ func addToRouteTableIfNoExists(prefix netip.Prefix, addr string) error {
}
if prefixGateway != nil && !prefixGateway.Equal(gateway) {
log.Warnf("route for network %s already exist and is pointing to the gateway: %s, won't add another one", prefix, prefixGateway)
log.Warnf("skipping adding a new route for network %s because it already exists and is pointing to the non default gateway: %s", prefix, prefixGateway)
return nil
}
return addToRouteTable(prefix, addr)
@ -45,11 +45,14 @@ func getExistingRIBRouteGateway(prefix netip.Prefix) (net.IP, error) {
if err != nil {
return nil, err
}
_, _, localGatewayAddress, err := r.Route(prefix.Addr().AsSlice())
_, gateway, preferredSrc, err := r.Route(prefix.Addr().AsSlice())
if err != nil {
log.Errorf("getting routes returned an error: %v", err)
return nil, errRouteNotFound
}
return localGatewayAddress, nil
if gateway == nil {
return preferredSrc, nil
}
return gateway, nil
}

43
client/internal/routemanager/systemops_test.go
View File

@ -4,6 +4,7 @@ import (
"fmt"
"github.com/netbirdio/netbird/iface"
"github.com/stretchr/testify/require"
"net"
"net/netip"
"testing"
)
@ -66,3 +67,45 @@ func TestAddRemoveRoutes(t *testing.T) {
})
}
}
func TestGetExistingRIBRouteGateway(t *testing.T) {
gateway, err := getExistingRIBRouteGateway(netip.MustParsePrefix("0.0.0.0/0"))
if err != nil {
t.Fatal("shouldn't return error when fetching the gateway: ", err)
}
if gateway == nil {
t.Fatal("should return a gateway")
}
addresses, err := net.InterfaceAddrs()
if err != nil {
t.Fatal("shouldn't return error when fetching interface addresses: ", err)
}
var testingIP string
var testingPrefix netip.Prefix
for _, address := range addresses {
if address.Network() != "ip+net" {
continue
}
prefix := netip.MustParsePrefix(address.String())
if !prefix.Addr().IsLoopback() && prefix.Addr().Is4() {
testingIP = prefix.Addr().String()
testingPrefix = prefix.Masked()
break
}
}
localIP, err := getExistingRIBRouteGateway(testingPrefix)
if err != nil {
t.Fatal("shouldn't return error: ", err)
}
if localIP == nil {
t.Fatal("should return a gateway for local network")
}
if localIP.String() == gateway.String() {
t.Fatal("local ip should not match with gateway IP")
}
if localIP.String() != testingIP {
t.Fatalf("local ip should match with testing IP: want %s got %s", testingIP, localIP.String())
}
}