Merge pull request #461 from plorinquer/cdp-update

Updates the CDP module (scapy/contrib/cdp.py).

scapy/contrib/cdp.py

@@ -49,8 +49,8 @@ _cdp_tlv_cls = { 0x0001: "CDPMsgDeviceID",
                  0x000f: "CDPMsgVoIPVLANQuery",
                  0x0010: "CDPMsgPower",
                  0x0011: "CDPMsgMTU",
-#                 0x0012: "CDPMsgTrustBitmap",
-#                 0x0013: "CDPMsgUntrustedPortCoS",
+                 0x0012: "CDPMsgTrustBitmap",
+                 0x0013: "CDPMsgUntrustedPortCoS",
 #                 0x0014: "CDPMsgSystemName",
 #                 0x0015: "CDPMsgSystemOID",
                  0x0016: "CDPMsgMgmtAddr",
@@ -213,10 +213,16 @@ class CDPMsgIPPrefix(CDPMsgGeneric):
                     ShortField("len", 8),
                     IPField("defaultgw", "192.168.0.1") ]
 
-# TODO : Do me !!!!!! 0x0008
 class CDPMsgProtoHello(CDPMsgGeneric):
     name = "Protocol Hello"
     type = 0x0008
+    fields_desc = [ XShortEnumField("type", 0x0008, _cdp_tlv_types),
+                    ShortField("len", 32),
+                    X3BytesField("oui", 0x00000c),
+                    XShortField("protocol_id", 0x0),
+                    # TLV length (len) - 2 (type) - 2 (len) - 3 (OUI) - 2
+                    # (Protocol ID)
+                    StrLenField("data", "", length_from=lambda p: p.len - 9) ]
 
 class CDPMsgVTPMgmtDomain(CDPMsgGeneric):
     name = "VTP Management Domain"
@@ -239,16 +245,18 @@ class CDPMsgVoIPVLANReply(CDPMsgGeneric):
     fields_desc = [ XShortEnumField("type", 0x000e, _cdp_tlv_types),
                     ShortField("len", 7),
                     ByteField("status?", 1),
-                    ShortField("vlan", 1)]
+                    ShortField("vlan", 1) ]
 
 
-# TODO : Do me !!! 0x000F
 class CDPMsgVoIPVLANQuery(CDPMsgGeneric):
     name = "VoIP VLAN Query"
     type = 0x000f
-
-#    fields_desc = [XShortEnumField("type", 0x000f, _cdp_tlv_types),
-#		   FieldLenField("len", None, "val", "!H") ]
+    fields_desc = [ XShortEnumField("type", 0x000f, _cdp_tlv_types),
+    		    ShortField("len", 7),
+                    XByteField("unknown1", 0),
+                    ShortField("vlan", 1),
+                    # TLV length (len) - 2 (type) - 2 (len) - 1 (unknown1) - 2 (vlan)
+                    StrLenField("unknown2", "", length_from=lambda p: p.len - 7) ]
 
 
 class _CDPPowerField(ShortField):
@@ -273,6 +281,18 @@ class CDPMsgMTU(CDPMsgGeneric):
                     ShortField("len", 6),
                     ShortField("mtu", 1500)]
 
+class CDPMsgTrustBitmap(CDPMsgGeneric):
+    name = "Trust Bitmap"
+    fields_desc = [ XShortEnumField("type", 0x0012, _cdp_tlv_types),
+                    ShortField("len", 5),
+                    XByteField("trust_bitmap", 0x0) ]
+
+class CDPMsgUntrustedPortCoS(CDPMsgGeneric):
+    name = "Untrusted Port CoS"
+    fields_desc = [ XShortEnumField("type", 0x0013, _cdp_tlv_types),
+                    ShortField("len", 5),
+                    XByteField("untrusted_port_cos", 0x0) ]
+
 class CDPMsgMgmtAddr(CDPMsgAddr):
     name = "Management Address"
     type = 0x0016

scapy/contrib/cdp.uts

+#################################### cdp.py ##################################
+% Regression tests for the cdp module
+
+
+################################## CDPv2_HDR ##################################
++ CDP
+
+= CDPv2 - Dissection (1)
+s = '\x02\xb4\x8c\xfa\x00\x01\x00\x0cmyswitch\x00\x02\x00\x11\x00\x00\x00\x01\x01\x01\xcc\x00\x04\xc0\xa8\x00\xfd\x00\x03\x00\x13FastEthernet0/1\x00\x04\x00\x08\x00\x00\x00(\x00\x05\x01\x14Cisco Internetwork Operating System Software \nIOS (tm) C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(22)EA14, RELEASE SOFTWARE (fc1)\nTechnical Support: http://www.cisco.com/techsupport\nCopyright (c) 1986-2010 by cisco Systems, Inc.\nCompiled Tue 26-Oct-10 10:35 by nburra\x00\x06\x00\x15cisco WS-C2950-12\x00\x08\x00$\x00\x00\x0c\x01\x12\x00\x00\x00\x00\xff\xff\xff\xff\x01\x02!\xff\x00\x00\x00\x00\x00\x00\x00\x0b\xbe\x18\x9a@\xff\x00\x00\x00\t\x00\x0cMYDOMAIN\x00\n\x00\x06\x00\x01\x00\x0b\x00\x05\x01\x00\x0e\x00\x07\x01\x00\n\x00\x12\x00\x05\x00\x00\x13\x00\x05\x00\x00\x16\x00\x11\x00\x00\x00\x01\x01\x01\xcc\x00\x04\xc0\xa8\x00\xfd'
+cdpv2 = CDPv2_HDR(s)
+assert(cdpv2.vers == 2)
+assert(cdpv2.ttl == 180)
+assert(cdpv2.cksum == 0x8cfa)
+assert(cdpv2.haslayer(CDPMsgDeviceID))
+assert(cdpv2.haslayer(CDPMsgAddr))
+assert(cdpv2.haslayer(CDPAddrRecordIPv4))
+assert(cdpv2.haslayer(CDPMsgPortID))
+assert(cdpv2.haslayer(CDPMsgCapabilities))
+assert(cdpv2.haslayer(CDPMsgSoftwareVersion))
+assert(cdpv2.haslayer(CDPMsgPlatform))
+assert(cdpv2.haslayer(CDPMsgProtoHello))
+assert(cdpv2.haslayer(CDPMsgVTPMgmtDomain))
+assert(cdpv2.haslayer(CDPMsgNativeVLAN))
+assert(cdpv2.haslayer(CDPMsgDuplex))
+assert(cdpv2.haslayer(CDPMsgVoIPVLANReply))
+assert(cdpv2.haslayer(CDPMsgTrustBitmap))
+assert(cdpv2.haslayer(CDPMsgUntrustedPortCoS))
+assert(cdpv2.haslayer(CDPMsgMgmtAddr))
+assert(cdpv2[CDPMsgProtoHello].len == 36)
+assert(cdpv2[CDPMsgProtoHello].oui == 0xc)
+assert(cdpv2[CDPMsgProtoHello].protocol_id == 0x112)
+assert(cdpv2[CDPMsgTrustBitmap].type == 0x0012)
+assert(cdpv2[CDPMsgTrustBitmap].len == 5)
+assert(cdpv2[CDPMsgTrustBitmap].trust_bitmap == 0x0)
+assert(cdpv2[CDPMsgUntrustedPortCoS].type == 0x0013)
+assert(cdpv2[CDPMsgUntrustedPortCoS].len == 5)
+assert(cdpv2[CDPMsgUntrustedPortCoS].untrusted_port_cos == 0x0)
+
+= CDPv2 - Dissection (2)
+s = '\x02\xb4\xd7\xdb\x00\x01\x00\x13SIP001122334455\x00\x02\x00\x11\x00\x00\x00\x01\x01\x01\xcc\x00\x04\xc0\xa8\x01!\x00\x03\x00\nPort 1\x00\x04\x00\x08\x00\x00\x00\x10\x00\x05\x00\x10P003-08-2-00\x00\x06\x00\x17Cisco IP Phone 7960\x00\x0f\x00\x08 \x02\x00\x01\x00\x0b\x00\x05\x01\x00\x10\x00\x06\x18\x9c'
+cdpv2 = CDPv2_HDR(s)
+assert(cdpv2.vers == 2)
+assert(cdpv2.ttl == 180)
+assert(cdpv2.cksum == 0xd7db)
+assert(cdpv2.haslayer(CDPMsgDeviceID))
+assert(cdpv2.haslayer(CDPMsgAddr))
+assert(cdpv2.haslayer(CDPAddrRecordIPv4))
+assert(cdpv2.haslayer(CDPMsgPortID))
+assert(cdpv2.haslayer(CDPMsgCapabilities))
+assert(cdpv2.haslayer(CDPMsgSoftwareVersion))
+assert(cdpv2.haslayer(CDPMsgPlatform))
+assert(cdpv2.haslayer(CDPMsgVoIPVLANQuery))
+assert(cdpv2.haslayer(CDPMsgDuplex))
+assert(cdpv2.haslayer(CDPMsgPower))
+assert(cdpv2[CDPMsgVoIPVLANQuery].type == 0x000f)
+assert(cdpv2[CDPMsgVoIPVLANQuery].len == 8)
+assert(cdpv2[CDPMsgVoIPVLANQuery].unknown1 == 0x20)
+assert(cdpv2[CDPMsgVoIPVLANQuery].vlan == 512)
+