| ## RSVP layer |
| |
| # This file is part of Scapy |
| # Scapy is free software: you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation, either version 2 of the License, or |
| # any later version. |
| # |
| # Scapy is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with Scapy. If not, see <http://www.gnu.org/licenses/>. |
| |
| # 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, {}) |
