restructure

config/config.go

@@ -0,0 +1 @@
+package config

config/type.go

@@ -0,0 +1,7 @@
+package config
+
+type Config struct {
+	IP                 string `json:"multicastAddr"`
+	MulticastInterface string `json:"multicastInterface"`
+	Port               int    `json:"MulticastPort"`
+}

main.go

@@ -5,14 +5,13 @@ import (
 	"log"
 	"net"
 
+	"github.com/crip/config"
 	"github.com/crip/ripv2"
-	"github.com/crip/ripv2/routes"
-	"github.com/crip/rtable"
 )
 
 func main() {
 	rip := ripv2.New()
-	routes := routes.New()
+	routes := ripv2.Init()
 	addr := net.UDPAddr{
 		Port: 520,
 		IP:   net.ParseIP("224.0.0.9"),
@@ -30,6 +29,12 @@ func main() {
 
 	log.Println("Running")
 	routes.Timer()
+	rip.Run(&config.Config{
+		IP:                 string(net.ParseIP("224.0.0.9")),
+		MulticastInterface: "enp1s0f1",
+		Port:               520,
+	})
+	/* NOT REACHED */
 	for {
 		n, UDPAddr, err := conn.ReadFromUDP(buff)
 		if err != nil {
@@ -44,7 +49,7 @@ func main() {
 		for _, v := range routes.Routes {
 			fmt.Printf("Route:%s\tSubnet:%s\tNexthop:%s\tMetric:%d\tTime: %v\n", v.Addr.String(), v.Subnet.String(), v.Nexthop.String(), v.Metric, v.TTL.Unix())
 		}
-		rtable.Add(routes)
+		//rtable.Add(routes)
 		fmt.Println("")
 	}
 }

ripv2/ripv2.go

@@ -1,11 +1,16 @@
 package ripv2
 
 import (
-	"bytes"
 	"encoding/binary"
 	"errors"
 	"fmt"
+	"log"
 	"net"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/crip/config"
 )
 
 func New() Message {
@@ -54,35 +59,52 @@ func (m *Message) MParse(b *[]byte, n int) error {
 	return nil
 }
 
-/* Basic parsing */
-func (m *Message) Parse(b *[]byte) error {
-	if len(*b) == 0 {
-		return fmt.Errorf("can't parse empty data")
+func (m *Message) Run(c *config.Config) {
+	iface := net.Interface{
+		Name:  c.MulticastInterface,
+		Flags: net.FlagMulticast,
 	}
-
-	bytes := bytes.NewBuffer(*b)
-
-	if err := binary.Read(bytes, binary.BigEndian, m); err != nil {
-		return err
+	addr := net.UDPAddr{
+		IP:   net.IP(c.IP),
+		Port: c.Port,
 	}
-
-	if m.Version != 2 {
-		return fmt.Errorf("version: %d", m.Version)
+	conn, err := net.ListenMulticastUDP("udp4", &iface, &addr)
+	if err != nil {
+		log.Fatalln(err)
 	}
+	defer conn.Close()
 
-	return nil
-}
-
-func (m *Message) Request(conn *net.UDPConn) ([]byte, error) {
-	var buffer = make([]byte, 24)
-	m.Command = REQUEST
-	m.Version = 2
-	m.RIP[0].Metric = 16
-	buff := bytes.NewBuffer(buffer)
-	buff.Reset()
-	if err := binary.Write(buff, binary.BigEndian, m); err != nil {
-		return []byte{}, err
-	}
-
-	return buffer, nil
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+
+	buffer := make([]byte, 484)
+	routes := Init()
+
+	for {
+		go func() {
+			sig := <-sigs
+			fmt.Println(sig)
+			fmt.Println("exit")
+			os.Exit(0)
+		}()
+
+		n, UDPAddr, err := conn.ReadFromUDP(buffer)
+		if err != nil {
+			conn.Close()
+			log.Fatal("unable to read from socket")
+		}
+
+		if n < 24 {
+			log.Println("packet length")
+		}
+
+		if err := m.MParse(&buffer, n); err != nil {
+			log.Fatalln(err)
+		}
+		routes.ParseRoutes(*UDPAddr, &m.RIP)
+		for _, v := range routes.Routes {
+			fmt.Printf("Route:%s\tSubnet:%s\tNexthop:%s\tMetric:%d\tTime: %v\n", v.Addr.String(), v.Subnet.String(), v.Nexthop.String(), v.Metric, v.TTL.Unix())
+		}
+		//rtable.Add(routes)
+	}
 }

ripv2/routes.go

@@ -1,4 +1,4 @@
-package routes
+package ripv2
 
 import (
 	"crypto/sha256"
@@ -6,8 +6,6 @@ import (
 	"net"
 	"sync"
 	"time"
-
-	"github.com/crip/ripv2"
 )
 
 type Routes struct {
@@ -24,7 +22,7 @@ type Route struct {
 	TTL     time.Time
 }
 
-func New() *Routes {
+func Init() *Routes {
 	var routes Routes
 	routes.Routes = make(map[string]Route, 25)
 	return &routes
@@ -46,7 +44,7 @@ func (r *Routes) append(route Route) {
 	r.Routes[string(bs)] = k
 }
 
-func (r *Routes) ParseRoutes(addr net.UDPAddr, rip *[]ripv2.RIP) {
+func (r *Routes) ParseRoutes(addr net.UDPAddr, rip *[]RIP) {
 	var route Route
 	for _, rip := range *rip {
 		/* if not af_inet */

ripv2/timers.go

@@ -1,4 +1,4 @@
-package routes
+package ripv2
 
 import (
 	"time"

rtable/table.go

@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"os/exec"
 
-	"github.com/crip/ripv2/routes"
+	"github.com/crip/ripv2"
 )
 
-func Add(r *routes.Routes) {
+func Add(r *ripv2.Routes) {
 	r.Lock()
 	for _, r := range r.Routes {
 		if !r.FIB {
@@ -19,7 +19,7 @@ func Add(r *routes.Routes) {
 	r.Unlock()
 }
 
-func command(command COMMAND, r *routes.Route) error {
+func command(command COMMAND, r *ripv2.Route) error {
 	var cmd *exec.Cmd
 	switch command {
 	case ADD, REMOVE:
@@ -30,7 +30,7 @@ func command(command COMMAND, r *routes.Route) error {
 	return cmd.Run()
 }
 
-func Remove(r *routes.Routes) {
+func Remove(r *ripv2.Routes) {
 	for _, r := range r.Routes {
 		command(REMOVE, &r)
 	}