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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,195 @@ | ||
| package synthesis | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "path" | ||
| "slices" | ||
|
|
||
| core "k8s.io/api/core/v1" | ||
| networking "k8s.io/api/networking/v1" | ||
| meta "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| types "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/apimachinery/pkg/util/intstr" | ||
|
|
||
| "github.com/np-guard/models/pkg/netp" | ||
| "github.com/np-guard/models/pkg/netset" | ||
|
|
||
| "github.com/np-guard/netpol-analyzer/pkg/netpol/connlist" | ||
| "github.com/np-guard/vmware-analyzer/pkg/common" | ||
| "github.com/np-guard/vmware-analyzer/pkg/symbolicexpr" | ||
| ) | ||
|
|
||
| const k8sAPIVersion = "networking.k8s.io/v1" | ||
|
|
||
| func CreateK8sResources(model *AbstractModelSyn, outDir string) error { | ||
| policies := toNetworkPolicies(model) | ||
| policiesFileName := path.Join(outDir, "policies.yaml") | ||
| if err := common.WriteYamlUsingJSON(policies, policiesFileName); err != nil { | ||
| return err | ||
| } | ||
| pods := toPods(model) | ||
| podsFileName := path.Join(outDir, "pods.yaml") | ||
| if err := common.WriteYamlUsingJSON(pods, podsFileName); err != nil { | ||
| return err | ||
| } | ||
| for _, format := range []string{"txt", "dot"} { | ||
| out, err := k8sAnalyzer(outDir, format) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = common.WriteToFile(path.Join(outDir, "k8s_connectivity."+format), out) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func toNetworkPolicies(model *AbstractModelSyn) []*networking.NetworkPolicy { | ||
| policies := []*networking.NetworkPolicy{} | ||
| addNewPolicy := func(description string) *networking.NetworkPolicy { | ||
| pol := newNetworkPolicy(fmt.Sprintf("policy_%d", len(policies)), description) | ||
| policies = append(policies, pol) | ||
| return pol | ||
| } | ||
| for _, p := range model.policy { | ||
| for _, ob := range p.outbound { | ||
| for _, p := range ob.allowOnlyRulePaths { | ||
| srcSelector, dstSelector, ports, empty := toSelectorsAndPorts(p) | ||
| if empty { | ||
| continue | ||
| } | ||
| to := []networking.NetworkPolicyPeer{{PodSelector: dstSelector}} | ||
| rules := []networking.NetworkPolicyEgressRule{{To: to, Ports: ports}} | ||
| pol := addNewPolicy(p.String()) | ||
| pol.Spec.Egress = rules | ||
| pol.Spec.PolicyTypes = []networking.PolicyType{"Egress"} | ||
| pol.Spec.PodSelector = *srcSelector | ||
| } | ||
| } | ||
| for _, ib := range p.inbound { | ||
| for _, p := range ib.allowOnlyRulePaths { | ||
| srcSelector, dstSelector, ports, empty := toSelectorsAndPorts(p) | ||
| if empty { | ||
| continue | ||
| } | ||
| from := []networking.NetworkPolicyPeer{{PodSelector: srcSelector}} | ||
| rules := []networking.NetworkPolicyIngressRule{{From: from, Ports: ports}} | ||
| pol := addNewPolicy(p.String()) | ||
| pol.Spec.Ingress = rules | ||
| pol.Spec.PolicyTypes = []networking.PolicyType{"Ingress"} | ||
| pol.Spec.PodSelector = *dstSelector | ||
| } | ||
| } | ||
| } | ||
| return policies | ||
| } | ||
|
|
||
| func newNetworkPolicy(name, description string) *networking.NetworkPolicy { | ||
| pol := &networking.NetworkPolicy{} | ||
| pol.TypeMeta.Kind = "NetworkPolicy" | ||
| pol.TypeMeta.APIVersion = k8sAPIVersion | ||
| pol.ObjectMeta.Name = name | ||
| pol.ObjectMeta.Labels = map[string]string{"description": description} | ||
| return pol | ||
| } | ||
|
|
||
| func toSelectorsAndPorts(p *symbolicexpr.SymbolicPath) (srcSelector, dstSelector *meta.LabelSelector, | ||
| ports []networking.NetworkPolicyPort, empty bool) { | ||
| srcSelector = toSelector(p.Src) | ||
| dstSelector = toSelector(p.Dst) | ||
| ports, empty = toPolicyPorts(p.Conn) | ||
| return | ||
| } | ||
|
|
||
| var codeToProtocol = map[int]core.Protocol{netset.UDPCode: core.ProtocolUDP, netset.TCPCode: core.ProtocolTCP} | ||
| var boolToOperator = map[bool]meta.LabelSelectorOperator{false: meta.LabelSelectorOpExists, true: meta.LabelSelectorOpDoesNotExist} | ||
|
|
||
| func pointerTo[T any](t T) *T { | ||
| return &t | ||
| } | ||
|
|
||
| func toSelector(con symbolicexpr.Conjunction) *meta.LabelSelector { | ||
| selector := &meta.LabelSelector{} | ||
| for _, a := range con { | ||
| label, notIn := a.AsSelector() | ||
| if label != "" { // not tautology | ||
| req := meta.LabelSelectorRequirement{Key: label, Operator: boolToOperator[notIn]} | ||
| selector.MatchExpressions = append(selector.MatchExpressions, req) | ||
| } | ||
| } | ||
| return selector | ||
| } | ||
|
|
||
| func toPolicyPorts(conn *netset.TransportSet) ([]networking.NetworkPolicyPort, bool) { | ||
| ports := []networking.NetworkPolicyPort{} | ||
| tcpUDPSet := conn.TCPUDPSet() | ||
| if tcpUDPSet.IsEmpty() { | ||
| return nil, true | ||
| } | ||
| if tcpUDPSet.IsAll() { | ||
| return nil, false | ||
| } | ||
| partitions := tcpUDPSet.Partitions() | ||
| for _, partition := range partitions { | ||
| protocols := partition.S1.Elements() | ||
| portRanges := partition.S3 | ||
| for _, portRange := range portRanges.Intervals() { | ||
| var portPointer *intstr.IntOrString | ||
| var endPortPointer *int32 | ||
| if portRange.Start() != netp.MinPort || portRange.End() != netp.MaxPort { | ||
| port := intstr.FromInt(int(portRange.Start())) | ||
| portPointer = &port | ||
| if portRange.End() != portRange.Start() { | ||
| //nolint:gosec // port should fit int32: | ||
| endPort := int32(portRange.End()) | ||
| endPortPointer = &endPort | ||
| } | ||
| } | ||
| for _, protocolCode := range protocols { | ||
| ports = append(ports, networking.NetworkPolicyPort{ | ||
| Protocol: pointerTo(codeToProtocol[int(protocolCode)]), | ||
| Port: portPointer, | ||
| EndPort: endPortPointer}) | ||
| } | ||
| if slices.Contains(protocols, netset.TCPCode) && slices.Contains(protocols, netset.UDPCode) { | ||
| ports = append(ports, networking.NetworkPolicyPort{Protocol: pointerTo(core.ProtocolSCTP), Port: portPointer, EndPort: endPortPointer}) | ||
| } | ||
| } | ||
| } | ||
| return ports, false | ||
| } | ||
|
|
||
| // /////////////////////////////////////////////////////////////////////////////// | ||
| func toPods(model *AbstractModelSyn) []*core.Pod { | ||
| pods := []*core.Pod{} | ||
| for _, vm := range model.vms { | ||
| pod := &core.Pod{} | ||
| pod.TypeMeta.Kind = "Pod" | ||
| pod.TypeMeta.APIVersion = k8sAPIVersion | ||
| pod.ObjectMeta.Name = vm.Name() | ||
| pod.ObjectMeta.UID = types.UID(vm.ID()) | ||
| if len(model.epToGroups[vm]) == 0 { | ||
| continue | ||
| } | ||
| pod.ObjectMeta.Labels = map[string]string{} | ||
| for _, group := range model.epToGroups[vm] { | ||
| label, _ := symbolicexpr.NewAtomicTerm(group, group.Name(), false).AsSelector() | ||
| pod.ObjectMeta.Labels[label] = label | ||
| } | ||
| pods = append(pods, pod) | ||
| } | ||
| return pods | ||
| } | ||
|
|
||
| /////////////////////////////////////////////////////////////////////////// | ||
|
|
||
| func k8sAnalyzer(outDir, format string) (string, error) { | ||
| analyzer := connlist.NewConnlistAnalyzer(connlist.WithOutputFormat(format)) | ||
|
|
||
| conns, _, err := analyzer.ConnlistFromDirPath(outDir) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return analyzer.ConnectionsListToString(conns) | ||
| } |
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