package networkdriver import ( "github.com/docker/libcontainer/netlink" "net" "testing" ) func TestNonOverlapingNameservers(t *testing.T) { network := &net.IPNet{ IP: []byte{192, 168, 0, 1}, Mask: []byte{255, 255, 255, 0}, } nameservers := []string{ "127.0.0.1/32", } if err := CheckNameserverOverlaps(nameservers, network); err != nil { t.Fatal(err) } } func TestOverlapingNameservers(t *testing.T) { network := &net.IPNet{ IP: []byte{192, 168, 0, 1}, Mask: []byte{255, 255, 255, 0}, } nameservers := []string{ "192.168.0.1/32", } if err := CheckNameserverOverlaps(nameservers, network); err == nil { t.Fatalf("Expected error %s got %s", ErrNetworkOverlapsWithNameservers, err) } } func TestCheckRouteOverlaps(t *testing.T) { orig := networkGetRoutesFct defer func() { networkGetRoutesFct = orig }() networkGetRoutesFct = func() ([]netlink.Route, error) { routesData := []string{"10.0.2.0/32", "10.0.3.0/24", "10.0.42.0/24", "172.16.42.0/24", "192.168.142.0/24"} routes := []netlink.Route{} for _, addr := range routesData { _, netX, _ := net.ParseCIDR(addr) routes = append(routes, netlink.Route{IPNet: netX}) } return routes, nil } _, netX, _ := net.ParseCIDR("172.16.0.1/24") if err := CheckRouteOverlaps(netX); err != nil { t.Fatal(err) } _, netX, _ = net.ParseCIDR("10.0.2.0/24") if err := CheckRouteOverlaps(netX); err == nil { t.Fatalf("10.0.2.0/24 and 10.0.2.0 should overlap but it doesn't") } } func TestCheckNameserverOverlaps(t *testing.T) { nameservers := []string{"10.0.2.3/32", "192.168.102.1/32"} _, netX, _ := net.ParseCIDR("10.0.2.3/32") if err := CheckNameserverOverlaps(nameservers, netX); err == nil { t.Fatalf("%s should overlap 10.0.2.3/32 but doesn't", netX) } _, netX, _ = net.ParseCIDR("192.168.102.2/32") if err := CheckNameserverOverlaps(nameservers, netX); err != nil { t.Fatalf("%s should not overlap %v but it does", netX, nameservers) } } func AssertOverlap(CIDRx string, CIDRy string, t *testing.T) { _, netX, _ := net.ParseCIDR(CIDRx) _, netY, _ := net.ParseCIDR(CIDRy) if !NetworkOverlaps(netX, netY) { t.Errorf("%v and %v should overlap", netX, netY) } } func AssertNoOverlap(CIDRx string, CIDRy string, t *testing.T) { _, netX, _ := net.ParseCIDR(CIDRx) _, netY, _ := net.ParseCIDR(CIDRy) if NetworkOverlaps(netX, netY) { t.Errorf("%v and %v should not overlap", netX, netY) } } func TestNetworkOverlaps(t *testing.T) { //netY starts at same IP and ends within netX AssertOverlap("172.16.0.1/24", "172.16.0.1/25", t) //netY starts within netX and ends at same IP AssertOverlap("172.16.0.1/24", "172.16.0.128/25", t) //netY starts and ends within netX AssertOverlap("172.16.0.1/24", "172.16.0.64/25", t) //netY starts at same IP and ends outside of netX AssertOverlap("172.16.0.1/24", "172.16.0.1/23", t) //netY starts before and ends at same IP of netX AssertOverlap("172.16.1.1/24", "172.16.0.1/23", t) //netY starts before and ends outside of netX AssertOverlap("172.16.1.1/24", "172.16.0.1/22", t) //netY starts and ends before netX AssertNoOverlap("172.16.1.1/25", "172.16.0.1/24", t) //netX starts and ends before netY AssertNoOverlap("172.16.1.1/25", "172.16.2.1/24", t) } func TestNetworkRange(t *testing.T) { // Simple class C test _, network, _ := net.ParseCIDR("192.168.0.1/24") first, last := NetworkRange(network) if !first.Equal(net.ParseIP("192.168.0.0")) { t.Error(first.String()) } if !last.Equal(net.ParseIP("192.168.0.255")) { t.Error(last.String()) } // Class A test _, network, _ = net.ParseCIDR("10.0.0.1/8") first, last = NetworkRange(network) if !first.Equal(net.ParseIP("10.0.0.0")) { t.Error(first.String()) } if !last.Equal(net.ParseIP("10.255.255.255")) { t.Error(last.String()) } // Class A, random IP address _, network, _ = net.ParseCIDR("10.1.2.3/8") first, last = NetworkRange(network) if !first.Equal(net.ParseIP("10.0.0.0")) { t.Error(first.String()) } if !last.Equal(net.ParseIP("10.255.255.255")) { t.Error(last.String()) } // 32bit mask _, network, _ = net.ParseCIDR("10.1.2.3/32") first, last = NetworkRange(network) if !first.Equal(net.ParseIP("10.1.2.3")) { t.Error(first.String()) } if !last.Equal(net.ParseIP("10.1.2.3")) { t.Error(last.String()) } // 31bit mask _, network, _ = net.ParseCIDR("10.1.2.3/31") first, last = NetworkRange(network) if !first.Equal(net.ParseIP("10.1.2.2")) { t.Error(first.String()) } if !last.Equal(net.ParseIP("10.1.2.3")) { t.Error(last.String()) } // 26bit mask _, network, _ = net.ParseCIDR("10.1.2.3/26") first, last = NetworkRange(network) if !first.Equal(net.ParseIP("10.1.2.0")) { t.Error(first.String()) } if !last.Equal(net.ParseIP("10.1.2.63")) { t.Error(last.String()) } }