server: fix advertising multiple local withdrawals with same prefix

a bug introduced by 332766189685028c4f9852e4285fb1a9025223cc

Signed-off-by: ISHIDA Wataru <ishida.wataru@lab.ntt.co.jp>

1 files changed, 13 insertions, 3 deletions

diff --git a/test/lib/base.py b/test/lib/base.py
index 4f2e8a69..38cac97a 100644
--- a/test/lib/base.py
+++ b/test/lib/base.py
@@ -158,6 +158,7 @@ class Container(object):
         self.ip6_addrs = []
         self.is_running = False
         self.eths = []
+        self.tcpdump_running = False
 
         if self.docker_name() in get_containers():
             self.remove()
@@ -230,12 +231,21 @@ class Container(object):
             return int(local(cmd, capture=True))
         return -1
 
-    def start_tcpdump(self, interface=None, filename=None):
+    def start_tcpdump(self, interface=None, filename=None, expr='tcp port 179'):
+        if self.tcpdump_running:
+            raise Exception('tcpdump already running')
+        self.tcpdump_running = True
         if not interface:
             interface = "eth0"
         if not filename:
-            filename = "{0}/{1}.dump".format(self.shared_volumes[0][1], interface)
-        self.local("tcpdump -i {0} -w {1}".format(interface, filename), detach=True)
+            filename = '{0}.dump'.format(interface)
+        self.local("tcpdump -i {0} -w {1}/{2} {3}".format(interface, self.shared_volumes[0][1], filename, expr), detach=True)
+        return '{0}/{1}'.format(self.shared_volumes[0][0], filename)
+
+    def stop_tcpdump(self):
+        self.local("pkill tcpdump")
+        self.tcpdump_running = False
+
 
 class BGPContainer(Container):