nebula/interface_test.go

120 lines
3.2 KiB
Go

package nebula
import (
"net/netip"
"testing"
"github.com/slackhq/nebula/cert"
"github.com/slackhq/nebula/config"
"github.com/slackhq/nebula/test"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
// TestReloadFirewall_CertUnsafeNetworksChanged verifies that reloadFirewall
// rebuilds the firewall when only the certificate's UnsafeNetworks have changed,
// even if the firewall section of the YAML has not.
func TestReloadFirewall_CertUnsafeNetworksChanged(t *testing.T) {
l := test.NewLogger()
vpnNet := netip.MustParsePrefix("10.0.0.1/24")
initialUnsafe := []netip.Prefix{netip.MustParsePrefix("198.51.100.0/24")}
// dummyCert avoids dragging the real signing pipeline into a unit test.
c1 := &dummyCert{
version: cert.Version2,
networks: []netip.Prefix{vpnNet},
unsafeNetworks: initialUnsafe,
}
pki := &PKI{}
pki.cs.Store(&CertState{v2Cert: c1, initiatingVersion: cert.Version2})
rawYAML := `firewall:
outbound:
- port: any
proto: any
host: any
inbound:
- port: any
proto: any
host: any
`
cfg := config.NewC(l)
require.NoError(t, cfg.LoadString(rawYAML))
fw, err := NewFirewallFromConfig(l, pki.getCertState(), cfg)
require.NoError(t, err)
require.Equal(t, initialUnsafe, fw.unsafeNetworks)
f := &Interface{
pki: pki,
firewall: fw,
l: l,
}
// Swap the cert with a different UnsafeNetworks set.
newUnsafe := []netip.Prefix{
netip.MustParsePrefix("198.51.100.0/24"),
netip.MustParsePrefix("203.0.113.0/24"),
}
c2 := &dummyCert{
version: cert.Version2,
networks: []netip.Prefix{vpnNet},
unsafeNetworks: newUnsafe,
}
pki.cs.Store(&CertState{v2Cert: c2, initiatingVersion: cert.Version2})
// Reload with the same YAML so HasChanged("firewall") reports false.
require.NoError(t, cfg.ReloadConfigString(rawYAML))
require.False(t, cfg.HasChanged("firewall"))
f.reloadFirewall(cfg)
assert.NotSame(t, fw, f.firewall, "firewall pointer should have been replaced")
assert.Equal(t, newUnsafe, f.firewall.unsafeNetworks)
assert.True(t, f.firewall.routableNetworks.Contains(netip.MustParseAddr("203.0.113.5")))
}
// TestReloadFirewall_NoChange verifies that reloadFirewall is a no-op when
// neither the firewall config nor the cert's UnsafeNetworks have changed.
func TestReloadFirewall_NoChange(t *testing.T) {
l := test.NewLogger()
vpnNet := netip.MustParsePrefix("10.0.0.1/24")
unsafe := []netip.Prefix{netip.MustParsePrefix("198.51.100.0/24")}
c1 := &dummyCert{
version: cert.Version2,
networks: []netip.Prefix{vpnNet},
unsafeNetworks: unsafe,
}
pki := &PKI{}
pki.cs.Store(&CertState{v2Cert: c1, initiatingVersion: cert.Version2})
rawYAML := `firewall:
outbound:
- port: any
proto: any
host: any
inbound:
- port: any
proto: any
host: any
`
cfg := config.NewC(l)
require.NoError(t, cfg.LoadString(rawYAML))
fw, err := NewFirewallFromConfig(l, pki.getCertState(), cfg)
require.NoError(t, err)
f := &Interface{
pki: pki,
firewall: fw,
l: l,
}
require.NoError(t, cfg.ReloadConfigString(rawYAML))
f.reloadFirewall(cfg)
assert.Same(t, fw, f.firewall, "firewall should not have been replaced")
}