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Added RSVP as contrib (ticket #197)
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‎scapy/contrib/rsvp.py‎

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## RSVP layer
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# http://trac.secdev.org/scapy/ticket/197
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# scapy.contrib.description = RSVP
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# scapy.contrib.status = loads
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from scapy.packet import *
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from scapy.fields import *
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from scapy.layers.inet import IP
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rsvpmsgtypes = { 0x01 : "Path",
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0x02 : "Reservation request",
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0x03 : "Path error",
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0x04 : "Reservation request error",
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0x05 : "Path teardown",
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0x06 : "Reservation teardown",
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0x07 : "Reservation request acknowledgment"
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}
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class RSVP(Packet):
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name = "RSVP"
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fields_desc = [ BitField("Version",1,4),
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BitField("Flags",1,4),
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ByteEnumField("Class",0x01, rsvpmsgtypes),
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XShortField("chksum", None),
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ByteField("TTL",1),
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XByteField("dataofs", 0),
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ShortField("Length",None)]
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def post_build(self, p, pay):
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p += pay
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if self.Length is None:
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l = len(p)
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p = p[:6]+chr((l>>8)&0xff)+chr(l&0xff)+p[8:]
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if self.chksum is None:
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ck = checksum(p)
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p = p[:2]+chr(ck>>8)+chr(ck&0xff)+p[4:]
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return p
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rsvptypes = { 0x01 : "Session",
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0x03 : "HOP",
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0x04 : "INTEGRITY",
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0x05 : "TIME_VALUES",
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0x06 : "ERROR_SPEC",
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0x07 : "SCOPE",
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0x08 : "STYLE",
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0x09 : "FLOWSPEC",
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0x0A : "FILTER_SPEC",
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0x0B : "SENDER_TEMPLATE",
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0x0C : "SENDER_TSPEC",
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0x0D : "ADSPEC",
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0x0E : "POLICY_DATA",
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0x0F : "RESV_CONFIRM",
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0x10 : "RSVP_LABEL",
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0x11 : "HOP_COUNT",
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0x12 : "STRICT_SOURCE_ROUTE",
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0x13 : "LABEL_REQUEST",
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0x14 : "EXPLICIT_ROUTE",
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0x15 : "ROUTE_RECORD",
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0x16 : "HELLO",
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0x17 : "MESSAGE_ID",
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0x18 : "MESSAGE_ID_ACK",
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0x19 : "MESSAGE_ID_LIST",
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0x1E : "DIAGNOSTIC",
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0x1F : "ROUTE",
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0x20 : "DIAG_RESPONSE",
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0x21 : "DIAG_SELECT",
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0x22 : "RECOVERY_LABEL",
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0x23 : "UPSTREAM_LABEL",
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0x24 : "LABEL_SET",
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0x25 : "PROTECTION",
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0x26 : "PRIMARY PATH ROUTE",
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0x2A : "DSBM IP ADDRESS",
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0x2B : "SBM_PRIORITY",
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0x2C : "DSBM TIMER INTERVALS",
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0x2D : "SBM_INFO",
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0x32 : "S2L_SUB_LSP",
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0x3F : "DETOUR",
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0x40 : "CHALLENGE",
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0x41 : "DIFF-SERV",
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0x42 : "CLASSTYPE",
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0x43 : "LSP_REQUIRED_ATTRIBUTES",
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0x80 : "NODE_CHAR",
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0x81 : "SUGGESTED_LABEL",
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0x82 : "ACCEPTABLE_LABEL_SET",
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0x83 : "RESTART_CA",
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0x84 : "SESSION-OF-INTEREST",
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0x85 : "LINK_CAPABILITY",
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0x86 : "Capability Object",
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0xA1 : "RSVP_HOP_L2",
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0xA2 : "LAN_NHOP_L2",
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0xA3 : "LAN_NHOP_L3",
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0xA4 : "LAN_LOOPBACK",
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0xA5 : "TCLASS",
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0xC0 : "TUNNEL",
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0xC1 : "LSP_TUNNEL_INTERFACE_ID",
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0xC2 : "USER_ERROR_SPEC",
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0xC3 : "NOTIFY_REQUEST",
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0xC4 : "ADMIN-STATUS",
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0xC5 : "LSP_ATTRIBUTES",
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0xC6 : "ALARM_SPEC",
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0xC7 : "ASSOCIATION",
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0xC8 : "SECONDARY_EXPLICIT_ROUTE",
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0xC9 : "SECONDARY_RECORD_ROUTE",
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0xCD : "FAST_REROUTE",
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0xCF : "SESSION_ATTRIBUTE",
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0xE1 : "DCLASS",
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0xE2 : "PACKETCABLE EXTENSIONS",
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0xE3 : "ATM_SERVICECLASS",
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0xE4 : "CALL_OPS (ASON)",
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0xE5 : "GENERALIZED_UNI",
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0xE6 : "CALL_ID",
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0xE7 : "3GPP2_Object",
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0xE8 : "EXCLUDE_ROUTE"
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}
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class RSVP_Object(Packet):
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name = "RSVP_Object"
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fields_desc = [ ShortField("Length",4),
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ByteEnumField("Class",0x01, rsvptypes),
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ByteField("C-Type",1)]
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def guess_payload_class(self, payload):
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if self.Class == 0x03:
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return RSVP_HOP
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elif self.Class == 0x05:
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return RSVP_Time
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elif self.Class == 0x0c:
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return RSVP_SenderTSPEC
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elif self.Class == 0x13:
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return RSVP_LabelReq
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elif self.Class == 0xCF:
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return RSVP_SessionAttrb
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else:
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return RSVP_Data
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class RSVP_Data(Packet):
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name = "Data"
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fields_desc = [StrLenField("Data","",length_from= lambda pkt:pkt.underlayer.Length - 4)]
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def default_payload_class(self, payload):
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return RSVP_Object
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class RSVP_HOP(Packet):
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name = "HOP"
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fields_desc = [ IPField("neighbor","0.0.0.0"),
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BitField("inface",1,32)]
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def default_payload_class(self, payload):
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return RSVP_Object
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class RSVP_Time(Packet):
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name = "Time Val"
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fields_desc = [ BitField("refresh",1,32)]
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def default_payload_class(self, payload):
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return RSVP_Object
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class RSVP_SenderTSPEC(Packet):
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name = "Sender_TSPEC"
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fields_desc = [ ByteField("Msg_Format",0),
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ByteField("reserve",0),
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ShortField("Data_Length",4),
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ByteField("Srv_hdr",1),
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ByteField("reserve2",0),
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ShortField("Srv_Length",4),
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StrLenField("Tokens","",length_from= lambda pkt:pkt.underlayer.Length - 12) ]
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def default_payload_class(self, payload):
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return RSVP_Object
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class RSVP_LabelReq(Packet):
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name = "Lable Req"
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fields_desc = [ ShortField("reserve",1),
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ShortField("L3PID",1)]
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def default_payload_class(self, payload):
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return RSVP_Object
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class RSVP_SessionAttrb(Packet):
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name = "Session_Attribute"
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fields_desc = [ ByteField("Setup_priority",1),
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ByteField("Hold_priority",1),
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ByteField("flags",1),
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ByteField("Name_length",1),
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StrLenField("Name","",length_from= lambda pkt:pkt.underlayer.Length - 8),
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]
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def default_payload_class(self, payload):
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return RSVP_Object
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bind_layers( IP, RSVP, { "proto" : 46} )
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bind_layers( RSVP, RSVP_Object, {})

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