func GraphPath(g *graph.Graph, n *graph.Node) string {
nodes := g.LookupShortestPath(n, graph.Metadata{"Type": "host"}, graph.Metadata{"RelationType": "ownership"})
if len(nodes) > 0 {
return NodePath(nodes).Marshal()
}
return ""
}
func startTopologyClient(t *testing.T, g *graph.Graph, onReady func(*websocket.Conn), onChange func(*websocket.Conn)) error {
// ready when got a first ping
ws, err := connectToAgent(5, onReady)
if err != nil {
return err
}
for {
_, m, err := ws.ReadMessage()
if err != nil {
break
}
err = processGraphMessage(g, m)
if err != nil {
return err
}
logging.GetLogger().Debugf("%s", string(m))
logging.GetLogger().Debugf("%s", g.String())
onChange(ws)
}
return nil
}
func NewOpenContrailMapper(g *graph.Graph, r *graph.Node) *OpenContrailMapper {
host := config.GetConfig().GetString("opencontrail.host")
port := config.GetConfig().GetInt("opencontrail.port")
if host == "" {
host = "localhost"
}
if port == 0 {
port = 8085
}
mapper := &OpenContrailMapper{graph: g, root: r, agentHost: host, agentPort: port}
mapper.nodeUpdaterChan = make(chan graph.Identifier, 500)
g.AddEventListener(mapper)
return mapper
}
func CreateRootNode(g *graph.Graph) *graph.Node {
hostID := config.GetConfig().GetString("host_id")
m := graph.Metadata{"Name": hostID, "Type": "host"}
if config.GetConfig().IsSet("agent.metadata") {
subtree := config.GetConfig().Sub("agent.metadata")
for key, value := range subtree.AllSettings() {
m[key] = value
}
}
buffer, err := ioutil.ReadFile("/var/lib/cloud/data/instance-id")
if err == nil {
m["InstanceID"] = strings.TrimSpace(string(buffer))
}
u, _ := uuid.NewV5(uuid.NamespaceOID, []byte(hostID))
return g.NewNode(graph.Identifier(u.String()), m)
}
func testCleanup(t *testing.T, g *graph.Graph, cmds []helper.Cmd, names []string) {
// cleanup side on the test
testPassed := false
onChange := func(ws *websocket.Conn) {
g.Lock()
defer g.Unlock()
if !testPassed {
clean := true
for _, name := range names {
n := g.LookupFirstNode(graph.Metadata{"Name": name})
if n != nil {
clean = false
break
}
}
if clean {
testPassed = true
ws.Close()
}
}
}
testTopology(t, g, cmds, onChange)
if !testPassed {
t.Error("test not executed or failed")
}
helper.CleanGraph(g)
}
func NewNeutronMapper(g *graph.Graph, wsClient *shttp.WSAsyncClient, authURL, username, password, tenantName, regionName, domainName string, availability gophercloud.Availability) (*NeutronMapper, error) {
mapper := &NeutronMapper{graph: g, wsClient: wsClient}
opts := gophercloud.AuthOptions{
IdentityEndpoint: authURL,
Username: username,
Password: password,
TenantName: tenantName,
DomainName: domainName,
AllowReauth: true,
}
provider, err := openstack.AuthenticatedClient(opts)
if err != nil {
return nil, err
}
client, err := openstack.NewNetworkV2(provider, gophercloud.EndpointOpts{
Name: "neutron",
Region: regionName,
Availability: availability,
})
if err != nil {
return nil, err
}
mapper.client = client
// Create a cache with a default expiration time of 5 minutes, and which
// purges expired items every 30 seconds
expire := config.GetConfig().GetInt("cache.expire")
cleanup := config.GetConfig().GetInt("cache.cleanup")
mapper.cache = cache.New(time.Duration(expire)*time.Second, time.Duration(cleanup)*time.Second)
mapper.nodeUpdaterChan = make(chan graph.Identifier, 500)
g.AddEventListener(mapper)
return mapper, nil
}
func NewNetNSContextByNode(g *graph.Graph, n *graph.Node) (*common.NetNSContext, error) {
name, ok := n.Metadata()["Name"]
if !ok || name == "" {
return nil, fmt.Errorf("No name for node %v", n)
}
ifName := name.(string)
nodes := g.LookupShortestPath(n, graph.Metadata{"Type": "host"}, graph.Metadata{"RelationType": "ownership"})
if len(nodes) == 0 {
return nil, fmt.Errorf("Failed to determine probePath for %s", ifName)
}
for _, node := range nodes {
if node.Metadata()["Type"] == "netns" {
name := node.Metadata()["Name"].(string)
path := node.Metadata()["Path"].(string)
logging.GetLogger().Debugf("Switching to namespace %s (path: %s)", name, path)
return common.NewNetNsContext(path)
}
}
return nil, nil
}
func CleanGraph(g *graph.Graph) {
g.Lock()
defer g.Unlock()
hostname, _ := os.Hostname()
g.DelHostGraph(hostname)
}
func NewFabricProbe(g *graph.Graph) *FabricProbe {
fb := &FabricProbe{
Graph: g,
links: make(map[*graph.Node]fabricLink),
}
g.AddEventListener(fb)
fb.Graph.Lock()
defer fb.Graph.Unlock()
list := config.GetConfig().GetStringSlice("agent.topology.fabric")
for _, link := range list {
pc := strings.Split(link, "->")
if len(pc) != 2 {
logging.GetLogger().Errorf("FabricProbe link definition should have two endpoint: %s", link)
continue
}
parentDef := strings.TrimSpace(pc[0])
childDef := strings.TrimSpace(pc[1])
if strings.HasPrefix(parentDef, "local/") {
logging.GetLogger().Error("FabricProbe doesn't support local node as parent node")
continue
}
if strings.HasPrefix(childDef, "local/") {
// Fabric Node to Local Node
childDef = strings.TrimPrefix(childDef, "local/")
parentNode, err := fb.addFabricNodeFromDef(parentDef)
if err != nil {
logging.GetLogger().Error(err.Error())
continue
}
_, childMetadata, err := nodeDefToMetadata(childDef)
if err != nil {
logging.GetLogger().Error(err.Error())
continue
}
// queue it as the local doesn't exist at start
fb.links[parentNode] = fabricLink{metadata: childMetadata}
} else {
// Fabric Node to Fabric Node
node1, err := fb.addFabricNodeFromDef(parentDef)
if err != nil {
logging.GetLogger().Error(err.Error())
continue
}
node2, err := fb.addFabricNodeFromDef(childDef)
if err != nil {
logging.GetLogger().Error(err.Error())
continue
}
if !fb.Graph.AreLinked(node1, node2) {
fb.Graph.Link(node1, node2, graph.Metadata{"RelationType": "layer2", "Type": "fabric"})
}
}
}
return fb
}
func InjectPacket(pp *PacketParams, g *graph.Graph) error {
srcdata := pp.SrcNode.Metadata()
dstdata := pp.DstNode.Metadata()
if _, ok := srcdata["IPV4"]; !ok {
return errors.New("Source Node doesn't have an IP")
}
srcIP := getIP(srcdata["IPV4"].(string))
if srcIP == nil {
return errors.New("Source Node doesn't have proper IP")
}
if _, ok := dstdata["IPV4"]; !ok {
return errors.New("Destination Node doesn't have an IP")
}
dstIP := getIP(dstdata["IPV4"].(string))
if dstIP == nil {
return errors.New("Destination Node doesn't have proper IP")
}
srcMAC, err := net.ParseMAC(srcdata["MAC"].(string))
if err != nil || srcMAC == nil {
return errors.New("Source Node doesn't have proper MAC")
}
dstMAC, err := net.ParseMAC(dstdata["MAC"].(string))
if err != nil || dstMAC == nil {
return errors.New("Destination Node doesn't have proper MAC")
}
//create packet
buffer := gopacket.NewSerializeBuffer()
ipLayer := &layers.IPv4{Version: 4, SrcIP: srcIP, DstIP: dstIP}
ethLayer := &layers.Ethernet{EthernetType: layers.EthernetTypeIPv4, SrcMAC: srcMAC, DstMAC: dstMAC}
switch pp.Type {
case "icmp":
ipLayer.Protocol = layers.IPProtocolICMPv4
gopacket.SerializeLayers(buffer, options,
ethLayer,
ipLayer,
&layers.ICMPv4{
TypeCode: layers.CreateICMPv4TypeCode(layers.ICMPv4TypeEchoRequest, 0),
},
gopacket.Payload([]byte(pp.Payload)),
)
default:
return fmt.Errorf("Unsupported traffic type '%s'", pp.Type)
}
g.RLock()
srcNode := g.GetNode(pp.SrcNode.ID)
if srcNode == nil {
g.RUnlock()
return errors.New("Unable to find source node")
}
nscontext, err := topology.NewNetNSContextByNode(g, srcNode)
defer nscontext.Close()
g.RUnlock()
if err != nil {
return err
}
handle, err := pcap.OpenLive(srcdata["Name"].(string), 1024, false, 2000)
if err != nil {
return fmt.Errorf("Unable to open the source node: %s", err.Error())
}
defer handle.Close()
packet := buffer.Bytes()
for i := 0; i < pp.Count; i++ {
if err := handle.WritePacketData(packet); err != nil {
return fmt.Errorf("Write error: %s", err.Error())
}
}
return nil
}
func (p *GoPacketProbe) run(g *graph.Graph, n *graph.Node, capture *api.Capture) error {
atomic.StoreInt64(&p.state, common.RunningState)
g.RLock()
ifName := n.Metadata()["Name"].(string)
firstLayerType := getGoPacketFirstLayerType(n)
nscontext, err := topology.NewNetNSContextByNode(g, n)
g.RUnlock()
defer nscontext.Close()
if err != nil {
return err
}
switch capture.Type {
case "pcap":
handle, err := pcap.OpenLive(ifName, snaplen, true, time.Second)
if err != nil {
return fmt.Errorf("Error while opening device %s: %s", ifName, err.Error())
}
if err := handle.SetBPFFilter(capture.BPFFilter); err != nil {
return fmt.Errorf("BPF Filter failed: %s", err)
}
p.handle = handle
p.packetSource = gopacket.NewPacketSource(handle, handle.LinkType())
logging.GetLogger().Infof("PCAP Capture started on %s with First layer: %s", ifName, firstLayerType)
default:
var handle *AFPacketHandle
fnc := func() error {
handle, err = NewAFPacketHandle(ifName, snaplen)
if err != nil {
return fmt.Errorf("Error while opening device %s: %s", ifName, err.Error())
}
return nil
}
if err = common.Retry(fnc, 2, 100*time.Millisecond); err != nil {
return err
}
p.handle = handle
p.packetSource = gopacket.NewPacketSource(handle, firstLayerType)
logging.GetLogger().Infof("AfPacket Capture started on %s with First layer: %s", ifName, firstLayerType)
}
// leave the namespace, stay lock in the current thread
nscontext.Quit()
packetsChan := p.flowTable.Start()
defer p.flowTable.Stop()
p.feedFlowTable(packetsChan)
return nil
}
func processGraphMessage(g *graph.Graph, m []byte) error {
g.Lock()
defer g.Unlock()
var msg shttp.WSMessage
if err := json.Unmarshal(m, &msg); err != nil {
return err
}
if msg.Namespace != "Graph" {
return nil
}
msgType, obj, err := graph.UnmarshalWSMessage(msg)
if err != nil {
return err
}
switch msgType {
case "NodeUpdated":
n := obj.(*graph.Node)
node := g.GetNode(n.ID)
if node != nil {
g.SetMetadata(node, n.Metadata())
}
case "NodeDeleted":
g.DelNode(obj.(*graph.Node))
case "NodeAdded":
n := obj.(*graph.Node)
if g.GetNode(n.ID) == nil {
g.AddNode(n)
}
case "EdgeUpdated":
e := obj.(*graph.Edge)
edge := g.GetEdge(e.ID)
if edge != nil {
g.SetMetadata(edge, e.Metadata())
}
case "EdgeDeleted":
g.DelEdge(obj.(*graph.Edge))
case "EdgeAdded":
e := obj.(*graph.Edge)
if g.GetEdge(e.ID) == nil {
g.AddEdge(e)
}
}
return nil
}
