diff options
Diffstat (limited to 'test/vpp_pg_interface.py')
| -rw-r--r-- | test/vpp_pg_interface.py | 82 |
1 files changed, 59 insertions, 23 deletions
diff --git a/test/vpp_pg_interface.py b/test/vpp_pg_interface.py index 2ebcbb57..44bd1a2d 100644 --- a/test/vpp_pg_interface.py +++ b/test/vpp_pg_interface.py @@ -6,7 +6,7 @@ from vpp_interface import VppInterface from scapy.layers.l2 import Ether, ARP from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_NA,\ ICMPv6NDOptSrcLLAddr, ICMPv6NDOptDstLLAddr -from util import ppp +from util import ppp, ppc class VppPGInterface(VppInterface): @@ -114,25 +114,71 @@ class VppPGInterface(VppInterface): except: pass wrpcap(self.in_path, pkts) + self.test.register_capture(self.cap_name) # FIXME this should be an API, but no such exists atm self.test.vapi.cli(self.input_cli) - self.test.pg_streams.append(self.cap_name) - self.test.vapi.cli("trace add pg-input %d" % len(pkts)) - def get_capture(self): + def get_capture(self, remark=None): """ Get captured packets :returns: iterable packets """ try: + self.wait_for_capture_file() output = rdpcap(self.out_path) except IOError: # TODO - self.test.logger.error("File %s does not exist, probably because no" + self.test.logger.debug("File %s does not exist, probably because no" " packets arrived" % self.out_path) - return [] + if remark: + raise Exception("No packets captured on %s(%s)" % + (self.name, remark)) + else: + raise Exception("No packets captured on %s" % self.name) return output + def assert_nothing_captured(self, remark=None): + if os.path.isfile(self.out_path): + try: + capture = self.get_capture() + self.test.logger.error( + ppc("Unexpected packets captured:", capture)) + except: + pass + if remark: + raise AssertionError( + "Capture file present for interface %s(%s)" % + (self.name, remark)) + else: + raise AssertionError("Capture file present for interface %s" % + self.name) + + def wait_for_capture_file(self, timeout=1): + """ + Wait until pcap capture file appears + + :param timeout: How long to wait for the packet (default 1s) + + :raises Exception: if the capture file does not appear within timeout + """ + limit = time.time() + timeout + if not os.path.isfile(self.out_path): + self.test.logger.debug( + "Waiting for capture file to appear, timeout is %ss", timeout) + else: + self.test.logger.debug("Capture file already exists") + return + while time.time() < limit: + if os.path.isfile(self.out_path): + break + time.sleep(0) # yield + if os.path.isfile(self.out_path): + self.test.logger.debug("Capture file appeared after %fs" % + (time.time() - (limit - timeout))) + else: + self.test.logger.debug("Timeout - capture file still nowhere") + raise Exception("Capture file did not appear within timeout") + def wait_for_packet(self, timeout): """ Wait for next packet captured with a timeout @@ -144,18 +190,8 @@ class VppPGInterface(VppInterface): """ limit = time.time() + timeout if self._pcap_reader is None: - self.test.logger.debug("Waiting for the capture file to appear") - while time.time() < limit: - if os.path.isfile(self.out_path): - break - time.sleep(0) # yield - if os.path.isfile(self.out_path): - self.test.logger.debug("Capture file appeared after %fs" % - (time.time() - (limit - timeout))) - self._pcap_reader = PcapReader(self.out_path) - else: - self.test.logger.debug("Timeout - capture file still nowhere") - raise Exception("Packet didn't arrive within timeout") + self.wait_for_capture_file(timeout) + self._pcap_reader = PcapReader(self.out_path) self.test.logger.debug("Waiting for packet") while time.time() < limit: @@ -197,11 +233,11 @@ class VppPGInterface(VppInterface): pg_interface.enable_capture() self.test.pg_start() self.test.logger.info(self.test.vapi.cli("show trace")) - arp_reply = pg_interface.get_capture() - if arp_reply is None or len(arp_reply) == 0: - self.test.logger.info( - "No ARP received on port %s" % - pg_interface.name) + try: + arp_reply = pg_interface.get_capture() + except: + self.test.logger.info("No ARP received on port %s" % + pg_interface.name) return arp_reply = arp_reply[0] # Make Dot1AD packet content recognizable to scapy |