1 files changed, 75 insertions, 0 deletions
diff --git a/tests/sys/netpfil/common/sniffer.py b/tests/sys/netpfil/common/sniffer.py
new file mode 100644
index 000000000000..583b27d34ca6
--- /dev/null
+++ b/tests/sys/netpfil/common/sniffer.py
@@ -0,0 +1,75 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2017 Kristof Provost <kp@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+import threading
+import scapy.all as sp
+import sys
+
+class Sniffer(threading.Thread):
+	def __init__(self, args, check_function, recvif, timeout=3, defrag=False):
+		threading.Thread.__init__(self)
+
+		self._sem = threading.Semaphore(0)
+		self._args = args
+		self._timeout = timeout
+		self._recvif = recvif
+		self._check_function = check_function
+		self._defrag = defrag
+		self.correctPackets = 0
+
+		self.start()
+		if not self._sem.acquire(timeout=30):
+			raise Exception("Failed to start sniffer")
+
+	def _checkPacket(self, packet):
+		ret = self._check_function(self._args, packet)
+		if ret:
+			self.correctPackets += 1
+		return ret
+
+	def _startedCb(self):
+		self._sem.release()
+
+	def run(self):
+		self.packets = []
+		# With fragment reassembly we can't stop the sniffer after catching
+		# the good packets, as those have not been reassembled. We must
+		#  wait for sniffer to finish and check returned packets instead.
+		if self._defrag == 'IPv4':
+			self.packets = sp.sniff(session=sp.IPSession, iface=self._recvif,
+				timeout=self._timeout, started_callback=self._startedCb)
+			for p in self.packets:
+				self._checkPacket(p)
+		elif self._defrag == 'IPv6':
+			self.packets = sp.sniff(session=sp.DefaultSession, iface=self._recvif,
+				timeout=self._timeout, started_callback=self._startedCb)
+			for p in sp.defragment6(self.packets):
+				self._checkPacket(p)
+		else:
+			self.packets = sp.sniff(iface=self._recvif,
+				stop_filter=self._checkPacket, timeout=self._timeout,
+				started_callback=self._startedCb)