mini controller

capture/collector.go

@@ -95,6 +95,7 @@ func (coll *Collector) parser() {
 			log.Warnf("unable to unmarshal request from %s: %s", obj.Address.String(), err)
 			continue
 		}
+		log.Debugf("recv[%s]: %s", obj.Address, msg.String())
 		response, err := coll.handler(obj.Address, msg)
 		if err != nil {
 			log.Warnf("unable to handle request from %s: %s", obj.Address.String(), err)
@@ -108,6 +109,7 @@ func (coll *Collector) parser() {
 
 // SendTo a specifical address
 func (coll *Collector) SendTo(addr *net.UDPAddr, msg *data.SocketMSG) {
+	log.Debugf("send[%s]: %s", addr, msg.String())
 	data, err := msg.Marshal()
 	if err != nil {
 		log.Warnf("unable to marshal response for %s: %s", addr.String(), err)
@@ -125,6 +127,7 @@ func (coll *Collector) SendTo(addr *net.UDPAddr, msg *data.SocketMSG) {
 
 // Send to every connection to default address
 func (coll *Collector) Send(msg *data.SocketMSG) {
+	log.Debugf("send: %s", msg.String())
 	data, err := msg.Marshal()
 	if err != nil {
 		log.Warnf("unable to marshal response: %s", err)

cmd/controller.go

@@ -0,0 +1,67 @@
+package cmd
+
+import (
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+
+	"dev.sum7.eu/wifictld/analyzer/capture"
+	"dev.sum7.eu/wifictld/analyzer/controller"
+	"dev.sum7.eu/wifictld/analyzer/database"
+)
+
+var (
+	central bool
+)
+
+// queryCmd represents the query command
+var controllerCmd = &cobra.Command{
+	Use:     "controller <interfaces>",
+	Short:   "simulate a wifictld controller",
+	Example: `analyzer controller "eth0,wlan0"`,
+	Args:    cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		ifaces := strings.Split(args[0], ",")
+
+		log.Infof("listen on: %s", ifaces)
+
+		var ifacesConfigs []capture.IFaceConfig
+		for _, iface := range ifaces {
+			ifaceConfig := capture.IFaceConfig{
+				InterfaceName: iface,
+				Port:          port,
+				IPAddress:     ipAddress,
+			}
+			ifacesConfigs = append(ifacesConfigs, ifaceConfig)
+		}
+
+		db := database.NewDB()
+
+		ctr := controller.NewController(db, central)
+		defer ctr.Close()
+
+		coll := capture.NewCollector(ctr.Handler, ifacesConfigs)
+		defer coll.Close()
+
+		ctr.Send = coll.Send
+		ctr.SendTo = coll.SendTo
+
+		// Wait for INT/TERM
+		sigs := make(chan os.Signal, 1)
+		signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+		sig := <-sigs
+		log.Println("received", sig)
+
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(controllerCmd)
+	controllerCmd.Flags().IntVar(&port, "port", capture.Port, "define a port to listen (if not set or set to 0 the kernel will use a random free port at its own)")
+	controllerCmd.Flags().StringVar(&ipAddress, "listen", capture.MulticastAddressDefault, "")
+	controllerCmd.Flags().BoolVar(&central, "central", false, "")
+}

cmd/dump.go

@@ -40,6 +40,8 @@ var dumpCmd = &cobra.Command{
 			ifacesConfigs = append(ifacesConfigs, ifaceConfig)
 		}
 
+		data.DEBUG = debug
+
 		coll := capture.NewCollector(func(addr *net.UDPAddr, msg *data.SocketMSG) (*data.SocketMSG, error) {
 			log.Infof("recv[%s]: %s", addr, msg.String())
 			return nil, nil

controller/handler.go

@@ -0,0 +1,29 @@
+package controller
+
+import (
+	"net"
+
+	// log "github.com/sirupsen/logrus"
+
+	"dev.sum7.eu/wifictld/analyzer/data"
+)
+
+func (c *Controller) Handler(addr *net.UDPAddr, msg *data.SocketMSG) (*data.SocketMSG, error) {
+	ignore := false
+	if msg.Types.Is(data.SocketMSGTypeClient) && msg.Client != nil {
+		ignore = c.db.LearnClient(addr.IP, msg.Client)
+	}
+	if !msg.Types.Is(data.SocketMSGTypeRequest) {
+		return nil, nil
+	}
+
+	msg = &data.SocketMSG{
+		Types:  (data.SocketMSGTypeResponse | data.SocketMSGTypeClient),
+		Client: c.db.GetClient(msg.Client.Addr),
+	}
+
+	if c.central || !ignore {
+		return msg, nil
+	}
+	return nil, nil
+}

controller/main.go

@@ -0,0 +1,39 @@
+package controller
+
+import (
+	"net"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+
+	"dev.sum7.eu/wifictld/analyzer/data"
+	"dev.sum7.eu/wifictld/analyzer/database"
+)
+
+type Controller struct {
+	SendTo  func(addr *net.UDPAddr, msg *data.SocketMSG)
+	Send    func(msg *data.SocketMSG)
+	db      *database.DB
+	ticker  *time.Ticker
+	central bool
+}
+
+func NewController(db *database.DB, central bool) *Controller {
+	ctl := &Controller{
+		ticker:  time.NewTicker(60 * time.Second),
+		db:      db,
+		central: central,
+	}
+	go ctl.Repeated()
+	return ctl
+}
+
+func (c *Controller) Close() {
+	c.ticker.Stop()
+}
+
+func (c *Controller) Repeated() {
+	for range c.ticker.C {
+		log.Infof("lerned: %d APs, %d Clients", len(c.db.APs), len(c.db.Clients))
+	}
+}

data/socket_msg.go

@@ -9,6 +9,8 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
+var DEBUG = false
+
 // SocketMSGType kind of packages
 type SocketMSGType uint32
 
@@ -20,7 +22,10 @@ const (
 )
 
 func (a SocketMSGType) Is(b SocketMSGType) bool {
+	if DEBUG {
+
 		log.Debugf("SocketType: %x & %x = %x -> %b", a, b, (a & b), (a&b) > 0)
+	}
 	return (a & b) > 0
 }
 
@@ -84,7 +89,9 @@ func (msg *SocketMSG) Marshal() ([]byte, error) {
 }
 
 func (msg *SocketMSG) Unmarshal(obj []byte) error {
+	if DEBUG {
 		log.Debugf("hex unmarshal: %x", obj)
+	}
 
 	pos := 0
 

database/ap.go

@@ -0,0 +1,4 @@
+package database
+
+type AP struct {
+}

database/client.go

@@ -0,0 +1,60 @@
+package database
+
+import (
+	"net"
+	"time"
+
+	// log "github.com/sirupsen/logrus"
+
+	"dev.sum7.eu/wifictld/analyzer/data"
+)
+
+type Client struct {
+	Addr           net.HardwareAddr
+	Time           time.Time
+	TryProbe       uint16
+	TryAuth        uint16
+	Connected      bool
+	Authed         bool
+	FreqHighest    uint16
+	SignalLowFreq  int16
+	SignalHighFreq int16
+}
+
+func (db *DB) LearnClient(apIP net.IP, clientWifictl *data.WifiClient) bool {
+	ret := false
+
+	apAddr := apIP.String()
+	ap, ok := db.APs[apAddr]
+	if !ok {
+		ap = &AP{}
+		db.APs[apAddr] = ap
+	}
+	clientAddr := clientWifictl.Addr.String()
+	client, ok := db.Clients[clientAddr]
+	if !ok {
+		client = &Client{
+			Addr: clientWifictl.Addr,
+		}
+		db.Clients[clientAddr] = client
+	}
+	client.Time = time.Now()
+
+	if client.FreqHighest < clientWifictl.FreqHighest {
+		ret = (client.FreqHighest != 0)
+		client.FreqHighest = clientWifictl.FreqHighest
+	}
+	return ret
+}
+
+func (db *DB) GetClient(addr net.HardwareAddr) *data.WifiClient {
+	client, ok := db.Clients[addr.String()]
+	wClient := &data.WifiClient{
+		Addr: addr,
+		Time: time.Now(),
+	}
+	if ok {
+		wClient.TryProbe = client.TryProbe
+	}
+	return wClient
+}

database/main.go

@@ -0,0 +1,13 @@
+package database
+
+type DB struct {
+	Clients map[string]*Client `json:"client"`
+	APs     map[string]*AP     `json:"ap"`
+}
+
+func NewDB() *DB {
+	return &DB{
+		Clients: make(map[string]*Client),
+		APs:     make(map[string]*AP),
+	}
+}