Fixing empty AS Path bug

protocols/bgp/server/update_sender.go

@@ -2,6 +2,7 @@ package server
 
 import (
 	"fmt"
+	"strings"
 
 	log "github.com/sirupsen/logrus"
 
@@ -25,7 +26,7 @@ func newUpdateSender(fsm *FSM) *UpdateSender {
 
 // AddPath serializes a new path and sends out a BGP update message
 func (u *UpdateSender) AddPath(pfx net.Prefix, p *route.Path) error {
-	asPathPA, err := packet.ParseASPathStr(fmt.Sprintf("%d %s", u.fsm.localASN, p.BGPPath.ASPath))
+	asPathPA, err := packet.ParseASPathStr(strings.TrimRight(fmt.Sprintf("%d %s", u.fsm.localASN, p.BGPPath.ASPath), " "))
 	if err != nil {
 		return fmt.Errorf("Unable to parse AS path: %v", err)
 	}

protocols/bgp/server/update_sender_add_path.go

@@ -2,6 +2,7 @@ package server
 
 import (
 	"fmt"
+	"strings"
 
 	log "github.com/sirupsen/logrus"
 
@@ -25,7 +26,7 @@ func newUpdateSenderAddPath(fsm *FSM) *UpdateSenderAddPath {
 
 // AddPath serializes a new path and sends out a BGP update message
 func (u *UpdateSenderAddPath) AddPath(pfx net.Prefix, p *route.Path) error {
-	asPathPA, err := packet.ParseASPathStr(fmt.Sprintf("%d %s", u.fsm.localASN, p.BGPPath.ASPath))
+	asPathPA, err := packet.ParseASPathStr(strings.TrimRight(fmt.Sprintf("%d %s", u.fsm.localASN, p.BGPPath.ASPath), " "))
 	if err != nil {
 		return fmt.Errorf("Unable to parse AS path: %v", err)
 	}