add BMP (BGP Monitoring Protocol) server feature

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

1 files changed, 84 insertions, 0 deletions

diff --git a/bmpd.go b/bmpd.go
new file mode 100644
index 00000000..7adb3134
--- /dev/null
+++ b/bmpd.go
@@ -0,0 +1,84 @@
+// Copyright (C) 2014 Nippon Telegraph and Telephone Corporation.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"log/syslog"
+	"net"
+	"os"
+
+	"github.com/osrg/gobgp/packet"
+)
+
+const (
+	DEFAULT_BMPD_HOST = "0.0.0.0"
+	DEFAULT_BMPD_PORT = "11019"
+)
+
+func processBMPClinet(conn net.Conn) {
+	tcpConn := conn.(*net.TCPConn)
+	defer tcpConn.Close()
+
+	for {
+		msg, err := bgp.ReadBMPMessage(tcpConn)
+		if err != nil {
+			fmt.Println(err)
+			log.Println("BMP client disconnected", conn.RemoteAddr())
+			break
+		}
+		j, _ := json.Marshal(msg)
+		log.Println(string(j))
+	}
+}
+
+func main() {
+	logwriter, err := syslog.New(syslog.LOG_INFO, "bmpd")
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	log.SetOutput(logwriter)
+
+	serverHost := os.Getenv("BMPD_HOST")
+	if serverHost == "" {
+		serverHost = DEFAULT_BMP_SERVER_HOST
+	}
+
+	serverPort := os.Getenv("BMPD_PORT")
+	if serverPort == "" {
+		serverPort = DEFAULT_BMP_SERVER_PORT
+	}
+
+	listener, err := net.Listen("tcp", serverHost+":"+serverPort)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	log.Println("listening on", serverHost+":"+serverPort)
+
+	for {
+		conn, err := listener.Accept()
+		log.Println("BMP client connected", conn.RemoteAddr())
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			continue
+		}
+		go processBMPClinet(conn)
+	}
+}