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-rw-r--r--test/vpp_pg_interface.py48
1 files changed, 26 insertions, 22 deletions
diff --git a/test/vpp_pg_interface.py b/test/vpp_pg_interface.py
index eeb9c1a5cb0..756f79b5609 100644
--- a/test/vpp_pg_interface.py
+++ b/test/vpp_pg_interface.py
@@ -13,6 +13,7 @@ from util import ppp, ppc
from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ismaddr
from scapy.utils import inet_pton, inet_ntop
+
def is_ipv6_misc(p):
""" Is packet one of uninteresting IPv6 broadcasts? """
if p.haslayer(ICMPv6ND_RA):
@@ -91,10 +92,12 @@ class VppPGInterface(VppInterface):
self._capture_cli = "packet-generator capture pg%u pcap %s" % (
self.pg_index, self.out_path)
self._cap_name = "pcap%u" % self.sw_if_index
- self._input_cli = "packet-generator new pcap %s source pg%u name %s" % (
- self.in_path, self.pg_index, self.cap_name)
+ self._input_cli = \
+ "packet-generator new pcap %s source pg%u name %s" % (
+ self.in_path, self.pg_index, self.cap_name)
- def rotate_out_file(self):
+ def enable_capture(self):
+ """ Enable capture on this packet-generator interface"""
try:
if os.path.isfile(self.out_path):
os.rename(self.out_path,
@@ -106,10 +109,6 @@ class VppPGInterface(VppInterface):
self._out_file))
except:
pass
-
- def enable_capture(self):
- """ Enable capture on this packet-generator interface"""
- self.rotate_out_file()
# FIXME this should be an API, but no such exists atm
self.test.vapi.cli(self.capture_cli)
self._pcap_reader = None
@@ -151,7 +150,7 @@ class VppPGInterface(VppInterface):
before = len(output.res)
if filter_out_fn:
output.res = [p for p in output.res if not filter_out_fn(p)]
- removed = before - len(output.res)
+ removed = len(output.res) - before
if removed:
self.test.logger.debug(
"Filtered out %s packets from capture (returning %s)" %
@@ -181,9 +180,13 @@ class VppPGInterface(VppInterface):
based_on = "based on stored packet_infos"
if expected_count == 0:
raise Exception(
- "Internal error, expected packet count for %s is 0!" % name)
+ "Internal error, expected packet count for %s is 0!" %
+ name)
self.test.logger.debug("Expecting to capture %s (%s) packets on %s" % (
expected_count, based_on, name))
+ if expected_count == 0:
+ raise Exception(
+ "Internal error, expected packet count for %s is 0!" % name)
while remaining_time > 0:
before = time.time()
capture = self._get_capture(remaining_time, filter_out_fn)
@@ -192,8 +195,6 @@ class VppPGInterface(VppInterface):
if len(capture.res) == expected_count:
# bingo, got the packets we expected
return capture
- elif expected_count == 0:
- return None
remaining_time -= elapsed_time
if capture:
raise Exception("Captured packets mismatch, captured %s packets, "
@@ -241,8 +242,9 @@ class VppPGInterface(VppInterface):
self.test.logger.debug("Waiting for capture file %s to appear, "
"timeout is %ss" % (self.out_path, timeout))
else:
- self.test.logger.debug("Capture file %s already exists" %
- self.out_path)
+ self.test.logger.debug(
+ "Capture file %s already exists" %
+ self.out_path)
return True
while time.time() < limit:
if os.path.isfile(self.out_path):
@@ -275,8 +277,10 @@ class VppPGInterface(VppInterface):
self._pcap_reader = PcapReader(self.out_path)
break
except:
- self.test.logger.debug("Exception in scapy.PcapReader(%s): "
- "%s" % (self.out_path, format_exc()))
+ self.test.logger.debug(
+ "Exception in scapy.PcapReader(%s): "
+ "%s" %
+ (self.out_path, format_exc()))
if not self._pcap_reader:
raise Exception("Capture file %s did not appear within "
"timeout" % self.out_path)
@@ -290,8 +294,9 @@ class VppPGInterface(VppInterface):
"Packet received after %ss was filtered out" %
(time.time() - (deadline - timeout)))
else:
- self.test.logger.debug("Packet received after %fs" %
- (time.time() - (deadline - timeout)))
+ self.test.logger.debug(
+ "Packet received after %fs" %
+ (time.time() - (deadline - timeout)))
return p
time.sleep(0) # yield
self.test.logger.debug("Timeout - no packets received")
@@ -335,7 +340,6 @@ class VppPGInterface(VppInterface):
self.test.logger.info("No ARP received on port %s" %
pg_interface.name)
return
- self.rotate_out_file()
arp_reply = captured_packet.copy() # keep original for exception
# Make Dot1AD packet content recognizable to scapy
if arp_reply.type == 0x88a8:
@@ -380,7 +384,8 @@ class VppPGInterface(VppInterface):
captured_packet = pg_interface.wait_for_packet(
deadline - now, filter_out_fn=None)
except:
- self.test.logger.error("Timeout while waiting for NDP response")
+ self.test.logger.error(
+ "Timeout while waiting for NDP response")
raise
ndp_reply = captured_packet.copy() # keep original for exception
# Make Dot1AD packet content recognizable to scapy
@@ -395,13 +400,12 @@ class VppPGInterface(VppInterface):
self._local_mac = opt.lladdr
self.test.logger.debug(self.test.vapi.cli("show trace"))
# we now have the MAC we've been after
- self.rotate_out_file()
return
except:
self.test.logger.info(
- ppp("Unexpected response to NDP request:", captured_packet))
+ ppp("Unexpected response to NDP request:",
+ captured_packet))
now = time.time()
self.test.logger.debug(self.test.vapi.cli("show trace"))
- self.rotate_out_file()
raise Exception("Timeout while waiting for NDP response")