diff --git a/test/patches/scapy-2.4.5/cdp.patch b/test/patches/scapy-2.4.5/cdp.patch
new file mode 100644
index 0000000..8fa9f69
--- /dev/null
+++ b/test/patches/scapy-2.4.5/cdp.patch
@@ -0,0 +1,14 @@
+diff --git a/scapy/contrib/cdp.py b/scapy/contrib/cdp.py
+index a1532b78..83963ff4 100644
+--- a/scapy/contrib/cdp.py
++++ b/scapy/contrib/cdp.py
+@@ -392,7 +392,7 @@ class _CDPChecksum:
+         This padding is only used for checksum computation.  The original
+         packet should not be altered."""
+         if len(pkt) % 2:
+-            last_chr = orb(pkt[-1])
++            last_chr = orb(pkt[len(pkt)-1:])
+             if last_chr <= 0x80:
+                 return pkt[:-1] + b'\x00' + chb(last_chr)
+             else:
+
diff --git a/test/patches/scapy-2.4.5/ikev2.patch b/test/patches/scapy-2.4.5/ikev2.patch
new file mode 100644
index 0000000..a1dd45a
--- /dev/null
+++ b/test/patches/scapy-2.4.5/ikev2.patch
@@ -0,0 +1,22 @@
+diff --git a/scapy/contrib/ikev2.py b/scapy/contrib/ikev2.py
+index 7799fd1e..f81af7ac 100644
+--- a/scapy/contrib/ikev2.py
++++ b/scapy/contrib/ikev2.py
+@@ -607,12 +607,16 @@ class IKEv2_payload_TSr(IKEv2_class):
+ 
+ class IKEv2_payload_Delete(IKEv2_class):
+     name = "IKEv2 Vendor ID"
++    name = "IKEv2 delete payload"
+     overload_fields = {IKEv2: {"next_payload": 42}}
+     fields_desc = [
+         ByteEnumField("next_payload", None, IKEv2_payload_type),
+         ByteField("res", 0),
+-        FieldLenField("length", None, "vendorID", "H", adjust=lambda pkt, x:x + 4),  # noqa: E501
+-        StrLenField("vendorID", "", length_from=lambda x:x.length - 4),
++        FieldLenField("length", None, "SPIs", "H", adjust=lambda pkt, x:x + 8),  # noqa: E501
++        ByteEnumField("proto", 1, {1: "IKEv2", 2: "AH", 3: "ESP"}),
++        ByteField("SPIsize", 0),
++        ShortField("SPInum", 0),
++        StrLenField("SPIs", "", length_from=lambda x: x.length - 8),
+     ]
+
diff --git a/test/patches/scapy-2.4.5/ipsec.patch b/test/patches/scapy-2.4.5/ipsec.patch
new file mode 100644
index 0000000..5cc197a
--- /dev/null
+++ b/test/patches/scapy-2.4.5/ipsec.patch
@@ -0,0 +1,212 @@
+diff --git a/scapy/layers/ipsec.py b/scapy/layers/ipsec.py
+index 8251dc14..a8390fc5 100644
+--- a/scapy/layers/ipsec.py
++++ b/scapy/layers/ipsec.py
+@@ -60,7 +60,7 @@ import scapy.modules.six as six
+ from scapy.modules.six.moves import range
+ from scapy.layers.inet6 import IPv6, IPv6ExtHdrHopByHop, IPv6ExtHdrDestOpt, \
+     IPv6ExtHdrRouting
+-
++from scapy.contrib.mpls import MPLS
+ 
+ ###############################################################################
+ class AH(Packet):
+@@ -360,13 +360,16 @@ class CryptAlgo(object):
+             encryptor = cipher.encryptor()
+ 
+             if self.is_aead:
+-                if esn_en:
+-                    aad = struct.pack('!LLL', esp.spi, esn, esp.seq)
+-                else:
+-                    aad = struct.pack('!LL', esp.spi, esp.seq)
++                aad = sa.build_aead(esp)
++                if self.name == 'AES-NULL-GMAC':
++                    aad = aad + esp.iv + data
++                    aes_null_gmac_data = data
++                    data = b''
+                 encryptor.authenticate_additional_data(aad)
+                 data = encryptor.update(data) + encryptor.finalize()
+                 data += encryptor.tag[:self.icv_size]
++                if self.name == 'AES-NULL-GMAC':
++                    data = aes_null_gmac_data + data
+             else:
+                 data = encryptor.update(data) + encryptor.finalize()
+ 
+@@ -402,16 +405,18 @@ class CryptAlgo(object):
+ 
+             if self.is_aead:
+                 # Tag value check is done during the finalize method
+-                if esn_en:
+-                    decryptor.authenticate_additional_data(
+-                        struct.pack('!LLL', esp.spi, esn, esp.seq))
+-                else:
+-                    decryptor.authenticate_additional_data(
+-                        struct.pack('!LL', esp.spi, esp.seq))
++                aad = sa.build_aead(esp)
++                if self.name == 'AES-NULL-GMAC':
++                    aad = aad + iv + data
++                    aes_null_gmac_data = data
++                    data = b''
++                decryptor.authenticate_additional_data(aad)
+             try:
+                 data = decryptor.update(data) + decryptor.finalize()
+             except InvalidTag as err:
+                 raise IPSecIntegrityError(err)
++            if self.name == 'AES-NULL-GMAC':
++                data = aes_null_gmac_data + data
+ 
+         # extract padlen and nh
+         padlen = orb(data[-2])
+@@ -458,6 +463,13 @@ if algorithms:
+                                        iv_size=8,
+                                        icv_size=16,
+                                        format_mode_iv=_salt_format_mode_iv)
++    CRYPT_ALGOS['AES-NULL-GMAC'] = CryptAlgo('AES-NULL-GMAC',
++                                       cipher=algorithms.AES,
++                                       mode=modes.GCM,
++                                       salt_size=4,
++                                       iv_size=8,
++                                       icv_size=16,
++                                       format_mode_iv=_salt_format_mode_iv)
+     if hasattr(modes, 'CCM'):
+         CRYPT_ALGOS['AES-CCM'] = CryptAlgo('AES-CCM',
+                                            cipher=algorithms.AES,
+@@ -546,7 +558,7 @@ class AuthAlgo(object):
+         else:
+             return self.mac(key, self.digestmod(), default_backend())
+ 
+-    def sign(self, pkt, key, esn_en=False, esn=0):
++    def sign(self, pkt, key, trailer=None, esn_en=False, esn=0):
+         """
+         Sign an IPsec (ESP or AH) packet with this algo.
+ 
+@@ -565,6 +577,8 @@ class AuthAlgo(object):
+ 
+         if pkt.haslayer(ESP):
+             mac.update(raw(pkt[ESP]))
++            if trailer:
++                mac.update(trailer)
+             pkt[ESP].data += mac.finalize()[:self.icv_size]
+ 
+         elif pkt.haslayer(AH):
+@@ -574,11 +588,13 @@ class AuthAlgo(object):
+             else:
+                 temp = raw(clone)
+             mac.update(temp)
++            if trailer:
++                mac.update(trailer)
+             pkt[AH].icv = mac.finalize()[:self.icv_size]
+ 
+         return pkt
+ 
+-    def verify(self, pkt, key, esn_en=False, esn=0):
++    def verify(self, pkt, key, trailer, esn_en=False, esn=0):
+         """
+         Check that the integrity check value (icv) of a packet is valid.
+ 
+@@ -617,6 +633,8 @@ class AuthAlgo(object):
+                 temp = raw(clone)
+ 
+         mac.update(temp)
++        if trailer:
++            mac.update(trailer) # bytearray(4)) #raw(trailer))
+         computed_icv = mac.finalize()[:self.icv_size]
+ 
+         # XXX: Cannot use mac.verify because the ICV can be truncated
+@@ -805,7 +823,7 @@ class SecurityAssociation(object):
+     This class is responsible of "encryption" and "decryption" of IPsec packets.  # noqa: E501
+     """
+ 
+-    SUPPORTED_PROTOS = (IP, IPv6)
++    SUPPORTED_PROTOS = (IP, IPv6, MPLS)
+ 
+     def __init__(self, proto, spi, seq_num=1, crypt_algo=None, crypt_key=None,
+                  auth_algo=None, auth_key=None, tunnel_header=None, nat_t_header=None, esn_en=False, esn=0):   # noqa: E501
+@@ -880,6 +898,23 @@ class SecurityAssociation(object):
+                 raise TypeError('nat_t_header must be %s' % UDP.name)
+         self.nat_t_header = nat_t_header
+ 
++    def build_aead(self, esp):
++        if self.esn_en:
++            return (struct.pack('!LLL', esp.spi, self.seq_num >> 32, esp.seq))
++        else:
++            return (struct.pack('!LL', esp.spi, esp.seq))
++
++    def build_seq_num(self, num):
++        # only lower order bits are  transmitted
++        # higher order bits are used in the ICV
++        lower = num & 0xffffffff
++        upper = num >> 32
++
++        if self.esn_en:
++            return lower, struct.pack("!I", upper)
++        else:
++            return lower, None
++
+     def check_spi(self, pkt):
+         if pkt.spi != self.spi:
+             raise TypeError('packet spi=0x%x does not match the SA spi=0x%x' %
+@@ -893,7 +928,8 @@ class SecurityAssociation(object):
+             if len(iv) != self.crypt_algo.iv_size:
+                 raise TypeError('iv length must be %s' % self.crypt_algo.iv_size)  # noqa: E501
+ 
+-        esp = _ESPPlain(spi=self.spi, seq=seq_num or self.seq_num, iv=iv)
++        low_seq_num, high_seq_num = self.build_seq_num(seq_num or self.seq_num)
++        esp = _ESPPlain(spi=self.spi, seq=low_seq_num, iv=iv)
+ 
+         if self.tunnel_header:
+             tunnel = self.tunnel_header.copy()
+@@ -917,7 +953,7 @@ class SecurityAssociation(object):
+                                       esn_en=esn_en or self.esn_en,
+                                       esn=esn or self.esn)
+ 
+-        self.auth_algo.sign(esp, self.auth_key)
++        self.auth_algo.sign(esp, self.auth_key, high_seq_num)
+ 
+         if self.nat_t_header:
+             nat_t_header = self.nat_t_header.copy()
+@@ -944,7 +980,8 @@ class SecurityAssociation(object):
+ 
+     def _encrypt_ah(self, pkt, seq_num=None, esn_en=False, esn=0):
+ 
+-        ah = AH(spi=self.spi, seq=seq_num or self.seq_num,
++        low_seq_num, high_seq_num = self.build_seq_num(seq_num or self.seq_num)
++        ah = AH(spi=self.spi, seq=low_seq_num,
+                 icv=b"\x00" * self.auth_algo.icv_size)
+ 
+         if self.tunnel_header:
+@@ -985,7 +1022,7 @@ class SecurityAssociation(object):
+             ip_header.plen = len(ip_header.payload) + len(ah) + len(payload)
+ 
+         signed_pkt = self.auth_algo.sign(ip_header / ah / payload,
+-                                         self.auth_key,
++                                         self.auth_key, high_seq_num,
+                                          esn_en=esn_en or self.esn_en,
+                                          esn=esn or self.esn)
+ 
+@@ -1025,11 +1062,12 @@ class SecurityAssociation(object):
+ 
+     def _decrypt_esp(self, pkt, verify=True, esn_en=None, esn=None):
+ 
++        low_seq_num, high_seq_num = self.build_seq_num(self.seq_num)
+         encrypted = pkt[ESP]
+ 
+         if verify:
+             self.check_spi(pkt)
+-            self.auth_algo.verify(encrypted, self.auth_key)
++            self.auth_algo.verify(encrypted, self.auth_key, high_seq_num)
+ 
+         esp = self.crypt_algo.decrypt(self, encrypted, self.crypt_key,
+                                       self.crypt_algo.icv_size or
+@@ -1070,9 +1108,10 @@ class SecurityAssociation(object):
+ 
+     def _decrypt_ah(self, pkt, verify=True, esn_en=None, esn=None):
+ 
++        low_seq_num, high_seq_num = self.build_seq_num(self.seq_num)
+         if verify:
+             self.check_spi(pkt)
+-            self.auth_algo.verify(pkt, self.auth_key,
++            self.auth_algo.verify(pkt, self.auth_key, high_seq_num,
+                                   esn_en=esn_en or self.esn_en,
+                                   esn=esn or self.esn)
+ 
diff --git a/test/patches/scapy-2.4.5/ppp.patch b/test/patches/scapy-2.4.5/ppp.patch
new file mode 100644
index 0000000..a3680bf
--- /dev/null
+++ b/test/patches/scapy-2.4.5/ppp.patch
@@ -0,0 +1,45 @@
+# NOTE: This patch copied from https://github.com/secdev/scapy
+#       commit 3e6900776698cd5472c5405294414d5b672a3f18
+#
+diff --git a/scapy/layers/ppp.py b/scapy/layers/ppp.py
+index b5cd42b4..e0f4c593 100644
+--- a/scapy/layers/ppp.py
++++ b/scapy/layers/ppp.py
+@@ -292,6 +292,14 @@ class _PPPProtoField(EnumField):
+ 
+     See RFC 1661 section 2
+     <https://tools.ietf.org/html/rfc1661#section-2>
++
++    The generated proto field is two bytes when not specified, or when specified
++    as an integer or a string:
++      PPP()
++      PPP(proto=0x21)
++      PPP(proto="Internet Protocol version 4")
++    To explicitly forge a one byte proto field, use the bytes representation:
++      PPP(proto=b'\x21')
+     """
+     def getfield(self, pkt, s):
+         if ord(s[:1]) & 0x01:
+@@ -304,12 +312,18 @@ class _PPPProtoField(EnumField):
+         return super(_PPPProtoField, self).getfield(pkt, s)
+ 
+     def addfield(self, pkt, s, val):
+-        if val < 0x100:
+-            self.fmt = "!B"
+-            self.sz = 1
++        if isinstance(val, bytes):
++            if len(val) == 1:
++                fmt, sz = "!B", 1
++            elif len(val) == 2:
++                fmt, sz = "!H", 2
++            else:
++                raise TypeError('Invalid length for PPP proto')
++            val = struct.Struct(fmt).unpack(val)[0]
+         else:
+-            self.fmt = "!H"
+-            self.sz = 2
++            fmt, sz = "!H", 2
++        self.fmt = fmt
++        self.sz = sz
+         self.struct = struct.Struct(self.fmt)
+         return super(_PPPProtoField, self).addfield(pkt, s, val)