Feature/add-ptp-protocol

scapy/config.py

@@ -1057,6 +1057,7 @@ class Conf(ConfClass):
         'ppi',
         'ppp',
         'pptp',
+        'ptp_v2',
         'radius',
         'rip',
         'rtp',

scapy/layers/ptp_v2.py

@@ -0,0 +1,160 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# This file is part of Scapy
+# See https://scapy.net/ for more information
+# Copyright (C) Philippe Biondi <[email protected]>
+# Copyright (C) Satveer Brar
+
+"""
+PTP (Precision Time Protocol).
+References : IEEE 1588-2008
+"""
+
+import struct
+
+from scapy.packet import Packet, bind_layers
+from scapy.fields import (
+    BitEnumField,
+    BitField,
+    ByteField,
+    IntField,
+    LongField,
+    ShortField,
+    ByteEnumField,
+    FlagsField,
+    XLongField,
+    XByteField,
+    ConditionalField,
+)
+from scapy.layers.inet import UDP
+
+
+#############################################################################
+#     PTPv2
+#############################################################################
+
+# IEEE 1588-2008 / Section 13.3.2.2
+
+_message_type = {
+    0x0: "Sync",
+    0x1: "Delay_Req",
+    0x2: "Pdelay_Req",
+    0x3: "Pdelay_Resp",
+    0x4: "Reserved",
+    0x5: "Reserved",
+    0x6: "Reserved",
+    0x7: "Reserved",
+    0x8: "Follow_Up",
+    0x9: "Delay_Resp",
+    0xA: "Pdelay_Resp_Follow",
+    0xB: "Announce",
+    0xC: "Signaling",
+    0xD: "Management",
+    0xE: "Reserved",
+    0xF: "Reserved"
+}
+
+_control_field = {
+    0x00: "Sync",
+    0x01: "Delay_Req",
+    0x02: "Follow_Up",
+    0x03: "Delay_Resp",
+    0x04: "Management",
+    0x05: "All others",
+}
+
+_flags = {
+    0x0001: "alternateMasterFlag",
+    0x0002: "twoStepFlag",
+    0x0004: "unicastFlag",
+    0x0010: "ptpProfileSpecific1",
+    0x0020: "ptpProfileSpecific2",
+    0x0040: "reserved",
+    0x0100: "leap61",
+    0x0200: "leap59",
+    0x0400: "currentUtcOffsetValid",
+    0x0800: "ptpTimescale",
+    0x1000: "timeTraceable",
+    0x2000: "frequencyTraceable"
+}
+
+
+class PTP(Packet):
+    """
+    PTP packet based on IEEE 1588-2008 / Section 13.3
+    """
+
+    name = "PTP"
+    match_subclass = True
+    fields_desc = [
+        BitField("transportSpecific", 0, 4),
+        BitEnumField("messageType", 0x0, 4, _message_type),
+        BitField("reserved1", 0, 4),
+        BitField("version", 2, 4),
+        ShortField("messageLength", None),
+        ByteField("domainNumber", 0),
+        ByteField("reserved2", 0),
+        FlagsField("flags", 0, 16, _flags),
+        LongField("correctionField", 0),
+        IntField("reserved3", 0),
+        XLongField("clockIdentity", 0),
+        ShortField("portNumber", 0),
+        ShortField("sequenceId", 0),
+        ByteEnumField("controlField", 0, _control_field),
+        ByteField("logMessageInterval", 0),
+        ConditionalField(BitField("originTimestamp_seconds", 0, 48),
+                         lambda pkt: pkt.messageType in [0x0, 0x1, 0x2, 0xB]),
+        ConditionalField(IntField("originTimestamp_nanoseconds", 0),
+                         lambda pkt: pkt.messageType in [0x0, 0x1, 0x2, 0xB]),
+        ConditionalField(BitField("preciseOriginTimestamp_seconds", 0, 48),
+                         lambda pkt: pkt.messageType == 0x8),
+        ConditionalField(IntField("preciseOriginTimestamp_nanoseconds", 0),
+                         lambda pkt: pkt.messageType == 0x8),
+        ConditionalField(BitField("requestReceiptTimestamp_seconds", 0, 48),
+                         lambda pkt: pkt.messageType == 0x3),
+        ConditionalField(IntField("requestReceiptTimestamp_nanoseconds", 0),
+                         lambda pkt: pkt.messageType == 0x3),
+        ConditionalField(BitField("receiveTimestamp_seconds", 0, 48),
+                         lambda pkt: pkt.messageType == 0x9),
+        ConditionalField(IntField("receiveTimestamp_nanoseconds", 0),
+                         lambda pkt: pkt.messageType == 0x9),
+        ConditionalField(BitField("responseOriginTimestamp_seconds", 0, 48),
+                         lambda pkt: pkt.messageType == 0xA),
+        ConditionalField(IntField("responseOriginTimestamp_nanoseconds", 0),
+                         lambda pkt: pkt.messageType == 0xA),
+        ConditionalField(ShortField("currentUtcOffset", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(ByteField("reserved4", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(ByteField("grandmasterPriority1", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(ByteField("grandmasterClockClass", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(XByteField("grandmasterClockAccuracy", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(ShortField("grandmasterClockVariance", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(ByteField("grandmasterPriority2", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(XLongField("grandmasterIdentity", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(ShortField("stepsRemoved", 0),
+                         lambda pkt: pkt.messageType == 0xB),
+        ConditionalField(XByteField("timeSource", 0),
+                         lambda pkt: pkt.messageType == 0xB)
+
+    ]
+
+    def post_build(self, pkt, pay):  # type: (bytes, bytes) -> bytes
+        """
+        Update the messageLength field after building the packet
+        """
+        if self.messageLength is None:
+            pkt = pkt[:2] + struct.pack("!H", len(pkt)) + pkt[4:]
+
+        return pkt + pay
+
+
+#     Layer bindings
+
+bind_layers(UDP, PTP, sport=319, dport=319)
+bind_layers(UDP, PTP, sport=320, dport=320)

test/scapy/layers/ptp_v2.uts

@@ -0,0 +1,95 @@
+% PTP regression tests for Scapy
+
++ Basic tests
+
+= specific haslayer and getlayer implementations for PTP
+~ haslayer getlayer PTP
+pkt = IP() / UDP() / PTP()
+assert PTP in pkt
+assert pkt.haslayer(PTP)
+assert isinstance(pkt[PTP], PTP)
+assert isinstance(pkt.getlayer(PTP), PTP)
+
++ Packet dissection tests
+
+= Sync packet dissection
+s = b'\x10\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x00\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.transportSpecific == 1
+assert pkt.messageType == 0
+assert pkt.reserved1 == 0
+assert pkt.version == 2
+assert pkt.messageLength == 44
+assert pkt.domainNumber == 123
+assert pkt.reserved2 == 0
+assert pkt.flags == None
+assert pkt.correctionField == 0
+assert pkt.reserved3 == 0
+assert pkt.clockIdentity == 0x8063ffff0009ba
+assert pkt.portNumber == 1
+assert pkt.sequenceId == 116
+assert pkt.controlField == 0
+assert pkt.logMessageInterval == 0
+assert pkt.originTimestamp_seconds == 1169232218
+assert pkt.originTimestamp_nanoseconds == 174389936
+
+= Delay_Req packet dissection
+s= b'\x11\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x01\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.messageType == 0x1
+assert pkt.controlField == 0x1
+
+= Pdelay_Req packet dissection
+s= b'\x12\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x05\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.messageType == 0x2
+assert pkt.controlField == 0x5
+
+= Pdelay_Resp packet dissection
+s= b'\x13\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x05\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.messageType == 0x3
+assert pkt.controlField == 0x5
+assert pkt.requestReceiptTimestamp_seconds == 1169232218
+assert pkt.requestReceiptTimestamp_nanoseconds == 174389936
+
+= Follow_Up packet dissection
+s= b'\x18\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x02\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.messageType == 0x8
+assert pkt.controlField == 0x2
+assert pkt.preciseOriginTimestamp_seconds == 1169232218
+assert pkt.preciseOriginTimestamp_nanoseconds == 174389936
+
+= Delay_Resp packet dissection
+s= b'\x19\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x03\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.messageType == 0x9
+assert pkt.controlField == 0x3
+assert pkt.receiveTimestamp_seconds == 1169232218
+assert pkt.receiveTimestamp_nanoseconds == 174389936
+
+= Pdelay_Resp_Follow packet dissection
+s= b'\x1A\x02\x00\x2c\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x05\x00\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0'
+pkt = PTP(s)
+assert pkt.messageType == 0xA
+assert pkt.controlField == 0x5
+assert pkt.responseOriginTimestamp_seconds == 1169232218
+assert pkt.responseOriginTimestamp_nanoseconds == 174389936
+
+= Announce packet dissection
+s= b'\x1b\x02\x00\x40\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\x00\x01\x00\x74\x05\x01\x00\x00\x45\xb1\x11\x5a\x0a\x64\xfa\xb0\x00\x00\x00\x60\x00\x00\x00\x80\x63\xff\xff\x00\x09\xba\xf8\x21\x00\x00\x80\x80'
+pkt = PTP(s)
+assert pkt.messageType == 0xB
+assert pkt.messageLength == 64
+assert pkt.controlField == 0x5
+assert pkt.currentUtcOffset == 0
+assert pkt.reserved4 == 0
+assert pkt.grandmasterPriority1 == 96
+assert pkt.grandmasterClockClass == 0
+assert pkt.grandmasterClockAccuracy == 0x0
+assert pkt.grandmasterClockVariance == 128
+assert pkt.grandmasterPriority2 == 99
+assert pkt.grandmasterIdentity == 0xffff0009baf82100
+assert pkt.stepsRemoved == 128
+assert pkt.timeSource == 0x80