Connection parameters from command-line

main.go

@@ -5,6 +5,8 @@ import (
 	"flag"
 	"fmt"
 	"net/http"
+	"os"
+	"strconv"
 
 	syslog "gopkg.in/mcuadros/go-syslog.v2"
 	"gopkg.in/mcuadros/go-syslog.v2/format"
@@ -20,13 +22,38 @@ func syslogdHandler(channel syslog.LogPartsChannel) {
 	}
 }
 
+func httpHandler(w http.ResponseWriter, r *http.Request) {
+	circbuf.Do(func(x interface{}) {
+		if x == nil {
+			return
+		}
+		logmsg := x.(format.LogParts)
+		if logmsg["message"] == nil {
+			return
+		}
+		c := logmsg["message"].(string)
+		w.Write([]byte(c))
+		w.Write([]byte("\n"))
+	})
+}
 func main() {
 	syslogSocketPath := flag.String("syslogd-socket", "", "The socket to listen to syslog addresses")
 	// dumpSocketPath := flag.String("dump-socket", "/run/buffer.sock", "The socket that user will connect to in order to receive logs")
 	bufsize := flag.Int("buffer-size", 1000, "Number of messages to keep")
+	UDPPort := flag.Int("log-port", 9514, "UDP port where to listen for syslog messages")
+	TCPPort := flag.Int("query-port", 9080, "TCP port where to listen for queries from the buffer")
+	address := flag.String("addr", "127.0.0.1", "Address to bind to")
 	flag.Parse()
+	if *TCPPort > 65535 || *TCPPort < 1 {
+		fmt.Fprintf(os.Stderr, "Error: selected query-port is out of bounds: %d\n", *TCPPort)
+		os.Exit(1)
+	}
+	if *UDPPort > 65535 || *UDPPort < 1 {
+		fmt.Fprintf(os.Stderr, "Error: selected log-port is out of bounds: %d\n", *UDPPort)
+		os.Exit(1)
+	}
 
-	channel := make(syslog.LogPartsChannel)
+	channel := make(chan format.LogParts)
 	handler := syslog.NewChannelHandler(channel)
 
 	server := syslog.NewServer()
@@ -34,29 +61,21 @@ func main() {
 	server.SetHandler(handler)
 	if *syslogSocketPath != "" {
 		server.ListenUnixgram(*syslogSocketPath)
+		fmt.Printf("Binding socket `%s` [syslog]\n", *syslogSocketPath)
+		os.Exit(2)
+	} else {
+		addr := *address + ":" + strconv.Itoa(*UDPPort)
+		fmt.Printf("Binding address `%s` [syslog]\n", addr)
+		server.ListenUDP(addr)
 	}
-	server.ListenUDP("127.0.0.1:9514")
 	circbuf = ring.New(*bufsize)
 	server.Boot()
-
 	go syslogdHandler(channel)
 
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		circbuf.Do(func(x interface{}) {
-			if x == nil {
-				return
-			}
-			logmsg := x.(format.LogParts)
-			if logmsg["message"] == nil {
-				return
-			}
-			c := logmsg["message"].(string)
-			w.Write([]byte(c))
-			w.Write([]byte("\n"))
-		})
-	})
-
-	http.ListenAndServe(":9080", nil)
+	http.HandleFunc("/", httpHandler)
+	listenPortFmt := ":" + strconv.Itoa(*TCPPort)
+	fmt.Printf("Binding address `%s` [http]\n", listenPortFmt)
+	http.ListenAndServe(listenPortFmt, nil)
 
 	server.Wait()
 }