1 ## RSVP layer 2 3 # This file is part of Scapy 4 # Scapy is free software: you can redistribute it and/or modify 5 # it under the terms of the GNU General Public License as published by 6 # the Free Software Foundation, either version 2 of the License, or 7 # any later version. 8 # 9 # Scapy is distributed in the hope that it will be useful, 10 # but WITHOUT ANY WARRANTY; without even the implied warranty of 11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 # GNU General Public License for more details. 13 # 14 # You should have received a copy of the GNU General Public License 15 # along with Scapy. If not, see <http://www.gnu.org/licenses/>. 16 17 # scapy.contrib.description = RSVP 18 # scapy.contrib.status = loads 19 20 from scapy.packet import * 21 from scapy.fields import * 22 from scapy.layers.inet import IP 23 24 rsvpmsgtypes = { 0x01 : "Path", 25 0x02 : "Reservation request", 26 0x03 : "Path error", 27 0x04 : "Reservation request error", 28 0x05 : "Path teardown", 29 0x06 : "Reservation teardown", 30 0x07 : "Reservation request acknowledgment" 31 } 32 33 class RSVP(Packet): 34 name = "RSVP" 35 fields_desc = [ BitField("Version",1,4), 36 BitField("Flags",1,4), 37 ByteEnumField("Class",0x01, rsvpmsgtypes), 38 XShortField("chksum", None), 39 ByteField("TTL",1), 40 XByteField("dataofs", 0), 41 ShortField("Length",None)] 42 def post_build(self, p, pay): 43 p += pay 44 if self.Length is None: 45 l = len(p) 46 p = p[:6]+chr((l>>8)&0xff)+chr(l&0xff)+p[8:] 47 if self.chksum is None: 48 ck = checksum(p) 49 p = p[:2]+chr(ck>>8)+chr(ck&0xff)+p[4:] 50 return p 51 52 rsvptypes = { 0x01 : "Session", 53 0x03 : "HOP", 54 0x04 : "INTEGRITY", 55 0x05 : "TIME_VALUES", 56 0x06 : "ERROR_SPEC", 57 0x07 : "SCOPE", 58 0x08 : "STYLE", 59 0x09 : "FLOWSPEC", 60 0x0A : "FILTER_SPEC", 61 0x0B : "SENDER_TEMPLATE", 62 0x0C : "SENDER_TSPEC", 63 0x0D : "ADSPEC", 64 0x0E : "POLICY_DATA", 65 0x0F : "RESV_CONFIRM", 66 0x10 : "RSVP_LABEL", 67 0x11 : "HOP_COUNT", 68 0x12 : "STRICT_SOURCE_ROUTE", 69 0x13 : "LABEL_REQUEST", 70 0x14 : "EXPLICIT_ROUTE", 71 0x15 : "ROUTE_RECORD", 72 0x16 : "HELLO", 73 0x17 : "MESSAGE_ID", 74 0x18 : "MESSAGE_ID_ACK", 75 0x19 : "MESSAGE_ID_LIST", 76 0x1E : "DIAGNOSTIC", 77 0x1F : "ROUTE", 78 0x20 : "DIAG_RESPONSE", 79 0x21 : "DIAG_SELECT", 80 0x22 : "RECOVERY_LABEL", 81 0x23 : "UPSTREAM_LABEL", 82 0x24 : "LABEL_SET", 83 0x25 : "PROTECTION", 84 0x26 : "PRIMARY PATH ROUTE", 85 0x2A : "DSBM IP ADDRESS", 86 0x2B : "SBM_PRIORITY", 87 0x2C : "DSBM TIMER INTERVALS", 88 0x2D : "SBM_INFO", 89 0x32 : "S2L_SUB_LSP", 90 0x3F : "DETOUR", 91 0x40 : "CHALLENGE", 92 0x41 : "DIFF-SERV", 93 0x42 : "CLASSTYPE", 94 0x43 : "LSP_REQUIRED_ATTRIBUTES", 95 0x80 : "NODE_CHAR", 96 0x81 : "SUGGESTED_LABEL", 97 0x82 : "ACCEPTABLE_LABEL_SET", 98 0x83 : "RESTART_CA", 99 0x84 : "SESSION-OF-INTEREST", 100 0x85 : "LINK_CAPABILITY", 101 0x86 : "Capability Object", 102 0xA1 : "RSVP_HOP_L2", 103 0xA2 : "LAN_NHOP_L2", 104 0xA3 : "LAN_NHOP_L3", 105 0xA4 : "LAN_LOOPBACK", 106 0xA5 : "TCLASS", 107 0xC0 : "TUNNEL", 108 0xC1 : "LSP_TUNNEL_INTERFACE_ID", 109 0xC2 : "USER_ERROR_SPEC", 110 0xC3 : "NOTIFY_REQUEST", 111 0xC4 : "ADMIN-STATUS", 112 0xC5 : "LSP_ATTRIBUTES", 113 0xC6 : "ALARM_SPEC", 114 0xC7 : "ASSOCIATION", 115 0xC8 : "SECONDARY_EXPLICIT_ROUTE", 116 0xC9 : "SECONDARY_RECORD_ROUTE", 117 0xCD : "FAST_REROUTE", 118 0xCF : "SESSION_ATTRIBUTE", 119 0xE1 : "DCLASS", 120 0xE2 : "PACKETCABLE EXTENSIONS", 121 0xE3 : "ATM_SERVICECLASS", 122 0xE4 : "CALL_OPS (ASON)", 123 0xE5 : "GENERALIZED_UNI", 124 0xE6 : "CALL_ID", 125 0xE7 : "3GPP2_Object", 126 0xE8 : "EXCLUDE_ROUTE" 127 } 128 129 class RSVP_Object(Packet): 130 name = "RSVP_Object" 131 fields_desc = [ ShortField("Length",4), 132 ByteEnumField("Class",0x01, rsvptypes), 133 ByteField("C-Type",1)] 134 def guess_payload_class(self, payload): 135 if self.Class == 0x03: 136 return RSVP_HOP 137 elif self.Class == 0x05: 138 return RSVP_Time 139 elif self.Class == 0x0c: 140 return RSVP_SenderTSPEC 141 elif self.Class == 0x13: 142 return RSVP_LabelReq 143 elif self.Class == 0xCF: 144 return RSVP_SessionAttrb 145 else: 146 return RSVP_Data 147 148 149 150 class RSVP_Data(Packet): 151 name = "Data" 152 fields_desc = [StrLenField("Data","",length_from= lambda pkt:pkt.underlayer.Length - 4)] 153 def default_payload_class(self, payload): 154 return RSVP_Object 155 156 class RSVP_HOP(Packet): 157 name = "HOP" 158 fields_desc = [ IPField("neighbor","0.0.0.0"), 159 BitField("inface",1,32)] 160 def default_payload_class(self, payload): 161 return RSVP_Object 162 163 class RSVP_Time(Packet): 164 name = "Time Val" 165 fields_desc = [ BitField("refresh",1,32)] 166 def default_payload_class(self, payload): 167 return RSVP_Object 168 169 class RSVP_SenderTSPEC(Packet): 170 name = "Sender_TSPEC" 171 fields_desc = [ ByteField("Msg_Format",0), 172 ByteField("reserve",0), 173 ShortField("Data_Length",4), 174 ByteField("Srv_hdr",1), 175 ByteField("reserve2",0), 176 ShortField("Srv_Length",4), 177 StrLenField("Tokens","",length_from= lambda pkt:pkt.underlayer.Length - 12) ] 178 def default_payload_class(self, payload): 179 return RSVP_Object 180 181 class RSVP_LabelReq(Packet): 182 name = "Lable Req" 183 fields_desc = [ ShortField("reserve",1), 184 ShortField("L3PID",1)] 185 def default_payload_class(self, payload): 186 return RSVP_Object 187 188 class RSVP_SessionAttrb(Packet): 189 name = "Session_Attribute" 190 fields_desc = [ ByteField("Setup_priority",1), 191 ByteField("Hold_priority",1), 192 ByteField("flags",1), 193 ByteField("Name_length",1), 194 StrLenField("Name","",length_from= lambda pkt:pkt.underlayer.Length - 8), 195 ] 196 def default_payload_class(self, payload): 197 return RSVP_Object 198 199 bind_layers( IP, RSVP, { "proto" : 46} ) 200 bind_layers( RSVP, RSVP_Object, {}) 201
