1 files changed, 137 insertions, 0 deletions
diff --git a/tests/unit/packet/test_ipv4.py b/tests/unit/packet/test_ipv4.py
new file mode 100644
index 00000000..69186f3f
--- /dev/null
+++ b/tests/unit/packet/test_ipv4.py
@@ -0,0 +1,137 @@
+# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+import unittest
+import logging
+import six
+import struct
+from struct import *
+from nose.tools import *
+from ryu.ofproto import ether, inet
+from ryu.lib.packet import packet_utils
+from ryu.lib.packet.ethernet import ethernet
+from ryu.lib.packet.packet import Packet
+from ryu.lib.packet.ipv4 import ipv4
+from ryu.lib.packet.tcp import tcp
+from ryu.lib import addrconv
+
+
+LOG = logging.getLogger('test_ipv4')
+
+
+class Test_ipv4(unittest.TestCase):
+    """ Test case for ipv4
+    """
+
+    version = 4
+    header_length = 5 + 10
+    ver_hlen = version << 4 | header_length
+    tos = 0
+    total_length = header_length + 64
+    identification = 30774
+    flags = 4
+    offset = 1480
+    flg_off = flags << 13 | offset
+    ttl = 64
+    proto = inet.IPPROTO_TCP
+    csum = 0xadc6
+    src = '131.151.32.21'
+    dst = '131.151.32.129'
+    length = header_length * 4
+    option = b'\x86\x28\x00\x00\x00\x01\x01\x22' \
+        + b'\x00\x01\xae\x00\x00\x00\x00\x00' \
+        + b'\x00\x00\x00\x00\x00\x00\x00\x00' \
+        + b'\x00\x00\x00\x00\x00\x00\x00\x00' \
+        + b'\x00\x00\x00\x00\x00\x00\x00\x01'
+
+    buf = pack(ipv4._PACK_STR, ver_hlen, tos, total_length, identification,
+               flg_off, ttl, proto, csum,
+               addrconv.ipv4.text_to_bin(src),
+               addrconv.ipv4.text_to_bin(dst)) \
+        + option
+
+    ip = ipv4(version, header_length, tos, total_length, identification,
+              flags, offset, ttl, proto, csum, src, dst, option)
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_init(self):
+        eq_(self.version, self.ip.version)
+        eq_(self.header_length, self.ip.header_length)
+        eq_(self.tos, self.ip.tos)
+        eq_(self.total_length, self.ip.total_length)
+        eq_(self.identification, self.ip.identification)
+        eq_(self.flags, self.ip.flags)
+        eq_(self.offset, self.ip.offset)
+        eq_(self.ttl, self.ip.ttl)
+        eq_(self.proto, self.ip.proto)
+        eq_(self.csum, self.ip.csum)
+        eq_(self.src, self.ip.src)
+        eq_(self.dst, self.ip.dst)
+        eq_(self.length, len(self.ip))
+        eq_(self.option, self.ip.option)
+
+    def test_parser(self):
+        res, ptype, _ = self.ip.parser(self.buf)
+
+        eq_(res.version, self.version)
+        eq_(res.header_length, self.header_length)
+        eq_(res.tos, self.tos)
+        eq_(res.total_length, self.total_length)
+        eq_(res.identification, self.identification)
+        eq_(res.flags, self.flags)
+        eq_(res.offset, self.offset)
+        eq_(res.ttl, self.ttl)
+        eq_(res.proto, self.proto)
+        eq_(res.csum, self.csum)
+        eq_(res.src, self.src)
+        eq_(res.dst, self.dst)
+        eq_(ptype, tcp)
+
+    def test_serialize(self):
+        buf = self.ip.serialize(bytearray(), None)
+        res = struct.unpack_from(ipv4._PACK_STR, six.binary_type(buf))
+        option = buf[ipv4._MIN_LEN:ipv4._MIN_LEN + len(self.option)]
+
+        eq_(res[0], self.ver_hlen)
+        eq_(res[1], self.tos)
+        eq_(res[2], self.total_length)
+        eq_(res[3], self.identification)
+        eq_(res[4], self.flg_off)
+        eq_(res[5], self.ttl)
+        eq_(res[6], self.proto)
+        eq_(res[8], addrconv.ipv4.text_to_bin(self.src))
+        eq_(res[9], addrconv.ipv4.text_to_bin(self.dst))
+        eq_(option, self.option)
+
+        # checksum
+        csum = packet_utils.checksum(buf)
+        eq_(csum, 0)
+
+    @raises(Exception)
+    def test_malformed_ipv4(self):
+        m_short_buf = self.buf[1:ipv4._MIN_LEN]
+        ipv4.parser(m_short_buf)
+
+    def test_json(self):
+        jsondict = self.ip.to_jsondict()
+        ip = ipv4.from_jsondict(jsondict['ipv4'])
+        eq_(str(self.ip), str(ip))