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