hdZddlZddlZddlZddlmZddlmZmZm Z ddl m Z m Z m Z mZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZm Z m!Z!ddl"m#Z#ddl$m%Z%ddl&m'Z'm(Z(dd l)m*Z*m+Z+dd l,m-Z-Gd d e(Z.e.Z/d Z0dZ1dZ2dZ3dZ4dZ5dZ6Gdde Z7Gdde Z8dZ9dZ:GddeZ;GddeZ<Gdde;Z=Gd d!e<Z>Gd"d#eZ?Gd$d%e@ZAe'jBfd&ZCd'd(d)d*d+d,d-ZDidd.d/d0dd1dd2d3d4d5d6d7d8d9d:d;d<d=d>d?d@dAdBdCdDdEdFdGdHdIdJddKidLdMdNdOddPdQdRdSdTdUdVdWdXdYdZd[d\d]d^d_d`dadbdcdddedfdgdhdidjdkdldmdndodpdqdrdsdtdudvd.dw ZEidd.d/dxddydd.d3dzd5d{d7d|d9d}d;d~ddddddddddddddddndddddddd.dZFddddddZGGddeZHdZIGddeZJGddeJeHZKd.dddZLidd.d/dddddd3dd5dd7dddddddddddddddddddddddiZMddddddddZNdZOiZPdZQGddeRZSGdÄdeSeZTGdńdeeTǦZUGdȄdeUZVGdɄdeUZWd.ddd̜ZXddddМZYGdфdeZZGdӄdeZ[GdՄdeUZ\ddiZ]GdׄdeUZ^Gd؄deUZ_GdلdeZ`GdۄdeZaGd݄deZbGd߄deJZcidd.d/dddddd3dd5dd7dd9dd;dd=dd?ddAddCddEddGddIdddidLddNddddQddSddUddWddYdd[dd]dd_ddaddcdddddddddZdid/dddddd3dd5dd7dd9dd;dd=dd?ddAddCddEddGddIddddLdddddddddddddddddZeGddeZfGdd eZgd d d d dZhGddeZiGddeZjGddeZkGddeZlGddeZmGddeZnGddeZoGddeZpdd d!d"d#d$d%d&d'd(d)d*d+d, ZqGd-d.eZrGd/d0eZsGd1d2eZtidd3d/d4dd5dd6d3d7d5d8d7d9d9d:d;d;dd<dd=dd>dd?dd7dd@dAdBddCZudDdEdFdGdHdIdJdKdLZvdMdNd:dOdPdQdRdSdTZwdUdVdWZxdMdNdXdOdPdQdYdZZyd3dXiZzdMdNdOd[dRd\d]dSd^d_ Z{iZ|d`dːdadbdcdddedfdgdhdidjdk Z}dld`dmZ~dndodpdqdrdsdtdudvdw Zd;dxiZd;dyiZdzd{d|ZdMdNd}d\d~dSdd^dZiZewe{eye}evexe|eze~eeed ZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZededededededededededi ZGddeZGddeZdZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZGddeZid/d ddddd3dd5dd7dd9dd;d.d=d0d?d2dGddIddddLdd[dddZGddeZGddeZGdÄdeJZdĐdŐdƐdǐdȐdɐdʐd˜Zid̐d͐dΐdϐdМd.dѐdҐdӐdԐdՐd֐dאdLd.dؐdِdڐdېdܐdݐdސdߐdddd idddddМdddddddddd d.ddmdLZGddeJZdddZddddZdddmZd/ad/adZGddeZGddeZGddeZGddeZGddeZGddeZdd d d.d ZGd deJZe e#eJd e e#eJd e eHecdd/ie eHeddie eHeddie eHeKdd3ie eHedd5ie-jde/jdS(z BGP (Border Gateway Protocol). N) pton_ntop)PacketPacket_metaclass bind_layers)FieldBitField BitEnumField XBitField ByteField ByteEnumField ShortFieldShortEnumFieldIntField IntEnumField LongFieldIEEEFloatFieldStrField StrLenFieldStrFixedLenField FieldLenFieldFieldListField PacketFieldPacketListFieldIPField FlagsFieldConditionalFieldMultiEnumField)TCP)IP6Field)conf ConfClass)orbchb) log_runtimeceZdZdZdZdS)BGPConfz# BGP module configuration. TN)__name__ __module__ __qualname____doc__use_2_bytes_asnU/mounts/lovelace/software/anaconda3/lib/python3.11/site-packages/scapy/contrib/bgp.pyr&r&%s OOOr-r&isc|dzdzS)zl Helper function that returns the numbers of bytes necessary to store the given number of bits. r,)length_in_bitss r._bits_to_bytes_lenr7Ps Q 1 $$r-cHeZdZdZdZdZdZdZdZdZ dZ d Z d Z d S) BGPFieldIPv4z IPv4 Field (CIDR) c|dzdzSz(Get the IP field mask length (in bytes).r4r5r,selfmasks r. mask2iplenzBGPFieldIPv4.mask2iplen^qQr-cTtjd|\}}t||fS)z'x.x.x.x/y to "internal" representation./resplitintr=pkthipr>s r.h2izBGPFieldIPv4.h2ib'8C##D4yy"}r-c6|\}}|dzt|zS)zH"Internal" representation to "human" representation (x.x.x.x/y).rBstrr=rHir>rJs r.i2hzBGPFieldIPv4.i2hgs"bCx#d))##r-c.|||SNrRr=rHrQs r.i2reprzBGPFieldIPv4.i2reprmxxQr-c<|\}}||dzSNr?)r=rHrQr>_s r.i2lenzBGPFieldIPv4.i2lenps"at$$q((r-c|\}}tj|}tjd||d||zS)zJ"Internal" (IP as bytes, mask as int) to "machine" representation.>BN)socket inet_atonstructpackr?rPs r.i2mzBGPFieldIPv4.i2mtsKb  b ! !{4&&,BT__T-B-B,B)CCCr-c4||||zSrTrer=rHsvals r.addfieldzBGPFieldIPv4.addfield{488C%%%%r-c|t|ddz}||d|||d|fSNrr[r?r"m2ir=rHrilengths r.getfieldzBGPFieldIPv4.getfield~KQqT++a/z488C7F74444r-ctd}||dfdtdD}|t j|fS)Nrr-c3HK|]}|kr|dz|dzndVdSr[r1Nr,).0rQmmask2iplen_ress r. z#BGPFieldIPv4.m2i..sAZZAN(:(:aAa!e nnZZZZZZr-)r"r?joinrangera inet_ntoa)r=rHrzr>rJr{s ` @r.rpzBGPFieldIPv4.m2ism1Q4yy.. XXZZZZZQVWXQYQYZZZ Z Zf&r**++r-N r'r(r)r*r?rKrRrWr^rerkrsrpr,r-r.r9r9Ys $$$    )))DDD&&&555,,,,,r-r9cHeZdZdZdZdZdZdZdZdZ dZ d Z d Z d S) BGPFieldIPv6zIPv6 Field (CIDR)c|dzdzSr;r,r<s r.r?zBGPFieldIPv6.mask2iplenr@r-cTtjd|\}}t||fS)z%x.x.x.x/y to internal representation.rBrCrGs r.rKzBGPFieldIPv6.h2irLr-c6|\}}|dzt|zS)z4"Internal" representation to "human" representation.rBrNrPs r.rRzBGPFieldIPv6.i2hs bCx#d))##r-c.|||SrTrUrVs r.rWzBGPFieldIPv6.i2reprrXr-c<|\}}||dzSrZr\rPs r.r^zBGPFieldIPv6.i2lens"bt$$q((r-c|\}}tjtj|}t jd||d||zS)zB"Internal" (IP as bytes, mask as int) to "machine" representation.r`N)r inet_ptonraAF_INET6rcrdr?rPs r.rezBGPFieldIPv6.i2msMb  " 5 5{4&&,BT__T-B-B,B)CCCr-c4||||zSrTrgrhs r.rkzBGPFieldIPv6.addfieldrlr-c|t|ddz}||d|||d|fSrnrorqs r.rszBGPFieldIPv6.getfieldrtr-ctddfdtdD}tjt j|fS)Nrr-c3nK|]/}|kr|dz|dzndV0dSrwr\)ryrQrzr>r=s r.r|z#BGPFieldIPv6.m2i..sNbbSTDOOD,A,A(A(AaAa!e nnwbbbbbbr-r0)r"r~rr inet_ntoprar)r=rHrzrJr>s` ` @r.rpzBGPFieldIPv6.m2isd1Q4yy XXbbbbbbX]^`XaXabbb b bi)&/2>>??r-Nrr,r-r.rrs $$$    )))DDD &&&555@@@@@r-rc(|tztkS)zN Used in BGPPathAttr to check if the extended-length flag is set. )_BGP_PA_EXTENDED_LENGTH)flagss r.has_extended_lengthrs * *.E EEr-cd}|dzt|kr|dz }t||}||krdS|dzdz}|d|zz }|t|krdS|dzr#t||dz d|dzz zrdS|dzt|kd}|dzt|krt||}|dkrt|dkrdS||krdS|dzdz}|d|zz }|t|krdS|dzr#t||dz d|dzz zrdS|dzt|kdS) a@ Detect IPv4/IPv6 prefixes conform to BGP Additional Path but NOT conform to standard BGP.. This is an adapted version of wireshark's detect_add_path_prefix46 https://github.com/wireshark/wireshark/blob/ed9e958a2ed506220fdab320738f1f96a3c2ffbb/epan/dissectors/packet-bgp.c#L2905 Kudos to them ! rr}Fr4r5r[T)lenr")rimax_bit_lengthrQ prefix_lenaddr_lens r.detect_add_path_prefix46rs A a%#a&&.. Q1YY  & &5Nq( Q\ s1vv::5 > 1QU8}}a 89 u a%#a&&.. A a%#a&&..1YY ??s1vvzz4  & &4Nq( Q\ s1vv::4 > 1QU8}}a 89 t a%#a&&.. 5r-c6eZdZdZdZeddgZdZdS) BGPNLRI_IPv4z+ Packet handling IPv4 NLRI fields. z IPv4 NLRIprefix 0.0.0.0/0ctjSrTr padding_layerr=payloads r.default_payload_classz"BGPNLRI_IPv4.default_payload_class !!r-N)r'r(r)r*namer9 fields_descrr,r-r.rrsH D<+667K"""""r-rc6eZdZdZdZeddgZdZdS) BGPNLRI_IPv6z+ Packet handling IPv6 NLRI fields. z IPv6 NLRIr::/0ctjSrTrrs r.rz"BGPNLRI_IPv6.default_payload_classrr-N)r'r(r)r*rrrrr,r-r.rrsH D<&112K"""""r-rcFeZdZdZdZeddeddgZdS)BGPNLRI_IPv4_APzC Packet handling IPv4 NLRI fields WITH BGP ADDITIONAL PATH zIPv4 NLRI (Additional Path) nlri_path_idrrrN)r'r(r)r*rrr9rr,r-r.rrsD )D8NA..<+668KKKr-rcFeZdZdZdZeddeddgZdS)BGPNLRI_IPv6_APzC Packet handling IPv6 NLRI fields WITH BGP ADDITIONAL PATH zIPv6 NLRI (Additional Path)rrrrN)r'r(r)r*rrrrr,r-r.rrsD )D8NA..<&113KKKr-rc4eZdZdZgdZfdZfdZxZS)BGPNLRIPacketListFieldz/ PacketListField handling NLRI fields. )r cls_group no_lengthc tt|j||tfi|dtt gfdt tgfd|\|_|_ d|v|_ dS)N )IPv4IPv6 length_from) superr__init__rrrrrrrr)r=rdefaultip_modekwargs __class__s r.rzBGPNLRIPacketListField.__init__s4$d++4 '6  %+   ,89<9:/ /  /+T^'f4r-c|jr4|tdkr|gfSdkr fd|_|jr|d||n|}|jt ||jfd|_tt| ||}|jrd|_|S)NrcSrTr,)rHindexs r.z1BGPNLRIPacketListField.getfield..&sur-cSrTr,)argsclss r.rz1BGPNLRIPacketListField.getfield..,sr-) rfind_BGP_HEADER_MARKERrrrr next_cls_cbrrrs)r=rHriremainresrrrs @@r.rszBGPNLRIPacketListField.getfield s > 5FF-..Ezz"u {{#4#4#4#4 .2.>E)D$$S)))**An $VT-@ A A -,,,*D11::3BB > $#D  r-)r'r(r)r* __slots__rrs __classcell__rs@r.rrsh=<Network Layer Reachability Information (NLRI) with MPLS Labelsz MCAST-VPNzeNetwork Layer Reachability Information used for Dynamic Placement of Multi-Segment PseudowireszEncapsulation SAFIz MCAST-VPLS@z Tunnel SAFIAz"Virtual Private LAN Service (VPLS)Bz BGP MDT SAFICzBGP 4over6 SAFIDzBGP 6over4 SAFIEz&Layer-1 VPN auto-discovery informationFz BGP EVPNsGz BGP-LS-VPNzMPLS-labeled VPN addressz9Multicast for BGP/MPLS IP Virtual Private Networks (VPNs)zRoute Target constraintz.IPv4 dissemination of flow specification rulesz/VPNv4 dissemination of flow specification ruleszVPN auto-discovery)HrrBGPOpen BGPUpdateBGPNotification BGPKeepAliveBGPRouteRefresh)r[r1r2r}rceZdZdZdZedddeddedd egZ e d d Z d Z d Z dS) BGPHeaderzA The header of any BGP message. References: RFC 4271 HEADERmarkerl rrNtyper}c t|Sz= Returns the right class for the given data. _bgp_dispatcherr_pktrkargss r. dispatch_hookzBGPHeader.dispatch_hook t$$$r-c|jNt|}|r|t|z}|ddtjd|z|ddz}||zS)Nr0!Hr)rrcrdr=ppayrrs r. post_buildzBGPHeader.post_buildsa 8 VVF +#c((*#2#T6222QrssV;A3wr-ctt|jtjtjSrT)r_bgp_cls_by_typerrr raw_layerrs r.guess_payload_classzBGPHeader.guess_payload_classs)(,,TYGGXXXr-rT)r'r(r)r*rr r r _bgp_message_typesr classmethodrr$r(r,r-r.rrs D  .    5$ fa!344K%%%[%YYYYYr-rc"tj}|tdtj}net|tkrM|ddt kr:t |d}|dkrtd}ntd}|S)z: Returns the right class for a given BGP message. Nrr0rr}r)r r'rr_BGP_HEADER_SIZErr")rr message_types r.rrs .C{DN33 w<<+ + + 222wr{++Lq  ~..{++ Jr-cDeZdZdZdZdZdZdZdZe d dZ d Z dS) BGPz5 Every BGP message inherits from this class. r[r1r2r}rNc t|Srrrs r.rzBGP.dispatch_hookrr-cdd}t|dkr|ddtkrt}|S)Nrr0)rrr)r=r"rs r.r(zBGP.guess_payload_class s3 q66B;;1SbS6%777C r-rT) r'r(r)r* OPEN_TYPE UPDATE_TYPENOTIFICATION_TYPEKEEPALIVE_TYPEROUTEREFRESH_TYPEr*rr(r,r-r.r/r/shIKN%%%[%r-r/ceZdZdZdZdS)rz KEEPALIVE message. rNr'r(r)r*rr,r-r.rrs DDDr-zAuthentication (deprecated) Capabilitiesrr[r1"Multiprotocol Extensions for BGP-4z"Route Refresh Capability for BGP-4#Outbound Route Filtering Capabilityz+Multiple routes to a destination capabilityzExtended Next Hop EncodingzBGP-Extended MessageGraceful Restart Capability(Support for 4-octet AS number capabilityzDeprecated (2003-03-06)z4Support for Dynamic Capability (capability specific)zMultisession BGP CapabilityzADD-PATH Capabilityz!Enhanced Route Refresh Capabilityz-Long-Lived Graceful Restart (LLGR) CapabilityIzFQDN Capabilityrz*Route Refresh Capability for BGP-4 (Cisco)z+Outbound Route Filtering Capability (Cisco)BGPCapMultiprotocol BGPCapGeneric BGPCapORFBGPCapGracefulRestartBGPCapFourBytesASN)r[r1r2rrrr@c|||j<|SrT)r')registryrs r. _register_clsrHTs HS\ Jr-ctd}|td}nWt|}|tkr=t|d}t t |d}|S)z= Returns the right class for a given BGP capability. rBNr)_capabilities_registryr_BGP_CAPABILITY_MIN_SIZEr"r_capabilities_objectsr)rrrrcodes r._bgp_capability_dispatcherrN\sl ! 1C$_5W - - -wqz??D044T?KKLLC Jr-ceZdZfdZxZS)_BGPCap_metaclassctt|||||}tt||SrT)rrP__new__rHrJ)rclsnamebasesattrsnewclassrs r.rRz_BGPCap_metaclass.__new__qsB*C0088 %((,h777r-)r'r(r)rRrrs@r.rPrPps8r-rPceZdZdS)_BGPCapability_metaclassN)r'r(r)r,r-r.rXrXxsDr-rXc6eZdZdZeddZdZdZdS) BGPCapabilityz! Generic BGP capability. Nc t|Sr)rNrs r.rzBGPCapability.dispatch_hooks *$///r-ct|}|tkrDd|dz}|dtz }t||S)zK Check that the payload is long enough (at least 2 bytes). z ({}z is < _BGP_CAPABILITY_MIN_SIZE z({})).)rrKformatr)r=rirrerrs r. pre_dissectzBGPCapability.pre_dissects\Q , , ,--''*KKC 8??#;<< s!(r-r)r max_length) r'r(r)r*rmatch_subclassr _capabilitiesrrrr,r-r.rBrBsu DN fa// h#DDD J 2 2s D D DKKKr-c eZdZdZdZdZeddeedde dd e ed d ed d e gZ d S) rAzm This class provides an implementation of the Multiprotocol capability. References: RFC 4760 r;TrMr[rrr}afirreservedsafiN) r'r(r)r*rrmr rnr raddress_family_identifierssubsequent_afisrr,r-r.rArAs} 0DN fa// (Aua!;<< *a   fa11 KKKr-Address Prefix ORFCP-ORF)rrrreceivesendzreceive + send)r[r1r2c eZdZdZGddeZdZeddee dde dde e d d d d e d gedgZdZd S)BGPCapORFBlockzo The "ORFBlock" is made of entries. cJeZdZdZdZeddeeddegZdS)BGPCapORFBlock.ORFTuplezC Packet handling tuples. zORF Typeorf_typer send_receiveN) r'r(r)r*rr _orf_typessend_receive_valuesrr,r-r.ORFTupler|sI   M*a 4 4 M.!-@ A A r-rzORF Capability Entryrprrqrr orf_numberNentries!B)count_ofrfc|jSrT)rrks r.rzBGPCapORFBlock.r-) count_fromcd}|j?t|j}|ddtjd|z|ddz}||zS)Nr}rr)rrrrcrd)r=r"r#counts r.r$zBGPCapORFBlock.post_buildsR ? " %%E"1" D%0001QRR58A3wr-)r'r(r)r*rrrrrsr r rtrrrr$r,r-r.rzrzs      6     "Dua!;<< *a   fa11         --    K$r-rzceZdZdZdZdS)BGPCapORFBlockPacketListFieldz+ Handles lists of BGPCapORFBlocks. c,g}d}|j||}|}| |d|}|rat|d}|dz}|dd|z}|d|zd}|||} || |a||fS)Nr}r1rrr"rpappend) r=rHrilstrrrrentries_lengthcurrentpackets r.rsz&BGPCapORFBlockPacketListField.getfields   '%%c**F  wwZF VAYJ'!^N0a.001GA.//0FXXc7++F JJv    s{r-Nr'r(r)r*rsr,r-r.rrs-r-rcjeZdZdZdZdZeddeedde dge d gZ dS) rCzx This class provides an implementation of the Outbound Route Filtering capability. References: RFC 5291 r<TrMr2rrNorfc|jSrTrjrks r.rzBGPCapORF..s!(r-r) r'r(r)r*rrmr rnr rrzrr,r-r.rCrCso 1DN fa// (D!!%%   **     KKKr-z,Forwarding state preserved (0x80: F bit set)c eZdZdZGddeZdZdZedde e dd e d d d e d d de dgegZ d S)rDzp This class provides an implementation of the Graceful Restart capability. References: RFC 4724 cbeZdZdZdZeddeeddeedde gZ dS)BGPCapGracefulRestart.GRTuplez+Tuple z%rprrrrN) r'r(r)r*rrrsr rtgr_address_family_flagsrr,r-r.GRTuplerCsV996%~eQ0JKK$}VQ@@$}Wa1HIIK r-rr=TrMrrrN restart_flagsrr} restart_timerr)r'r(r)r*rrrrmr rnr rrrr,r-r.rDrD<s KKKKK&KKK )DN =];;9Xt,,8OQ228NAr22"?9b':: TrMrrrr}asnrN) r'r(r)r*rrmr rnr rrr,r-r.rErEXsZ 6DN =];;9Xq))8E1%%'KKKr-cFeZdZdZdZeddeddgZdS)BGPAuthenticationInformationz Provides an implementation of the Authentication Information optional parameter, which is now obsolete. References: RFC 1771, RFC 1654, RFC 4271 zBGP Authentication Dataauthentication_coderauthentication_dataN)r'r(r)r*rr rrr,r-r.rrjsF %D92A6681488:KKKr-rceZdZdZdZdS)BGPOptParamPacketListFieldzJ PacketListField handling the optional parameters (OPEN message). c<g}d}|j||}|}||d|||d}}|r\t|d}|dd|z}|d|zd}|||} || |\||z|fS)Nrr[r1r) r=rHrirrrrret param_lenrrs r.rsz#BGPOptParamPacketListField.getfields   '%%c**F  GVG*ajCF F1II^a)m^,GA MNN+FXXc7++F JJv     |S  r-Nrr,r-r.rr|s-!!!!!r-rc eZdZdZdZeddeeddee dde dee d de d gZ d Z dS) BGPOptParamzc Provides an implementation the OPEN message optional parameters. References: RFC 4271 zOptional parameter param_typer1 param_lengthN param_valuec|jdkSNr1rrks r.rzBGPOptParam. ala'r-rc|jdkSrZrrks r.rzBGPOptParam.rr-cd}|}|jn|j |jd}nt|dz }|ddt |z}|jdkr|j|jdkr|j ||ddz}||zSra)rrrrr#r)r=r"r#rrrs r.r$zBGPOptParam.post_builds   $'D,D,LQrrUS[[(F1$$)9)E_))d.F.R!ABB%|r-)r'r(r)r*rr optional_parameter_codesr rrrZrrr$r,r-r.rrs D lA'?@@ .$'' K   ( '     K%,   ( '   K.r-rc eZdZdZdZeddeddeddedd ed d d d e d ge dgZ dZ d S)r zb OPEN messages are exchanged in order to open a new BGP session. References: RFC 4271 rversionr}my_asr hold_timebgp_id0.0.0.0 opt_param_lenN opt_paramsrrgrfc|jSrT)rrks r.rzBGPOpen.!/r-rc|j=t|dz }|ddtjd|z|ddz}||zS)Nrrr)rrrcrdr!s r.r$zBGPOpen.post_buildsN   %VVb[F"1" D&111AbccF:A3wr-) r'r(r)r*rr r rrrrrr$r,r-r.r r s D )Q 7A ;"")$$  "    #"   11    K&r-ORIGINAS_PATHNEXT_HOPMULTI_EXIT_DISC LOCAL_PREFATOMIC_AGGREGATE AGGREGATOR COMMUNITY ORIGINATOR_ID CLUSTER_LISTzDPA (deprecated)z#ADVERTISER (Historic) (deprecated)z.RCID_PATH / CLUSTER_ID (Historic) (deprecated) MP_REACH_NLRIMP_UNREACH_NLRIzEXTENDED COMMUNITIESAS4_PATHAS4_AGGREGATORz*SAFI Specific Attribute (SSA) (deprecated)z Connector Attribute (deprecated)zAS_PATHLIMIT (deprecated) PMSI_TUNNELzTunnel Encapsulation AttributezTraffic Engineering(IPv6 Address Specific Extended CommunityAIGPzPE Distinguisher Labelsz3BGP Entropy Label Capability Attribute (deprecated)zBGP-LS AttributerLARGE_COMMUNITY(zBGP Prefix-SIDATTR_SETrzReserved for development)rr/rrrrrrrrrrrrrceZdZdZdZdS)BGPPathAttrPacketListFieldzH PacketListField handling the path attributes (UPDATE message). cg}d}|j||}d}|}||d|||d}}|rt|d}d}t|r>tjd|ddd}|dd|z} |d|zd}n/t|d}|dd|z} |d|zd}||| } || |||z|fS)Nrrhr r1r}r2)rr"rrcunpackrpr) r=rHrirrrrrrattr_lenrrs r.rsz#BGPPathAttrPacketListField.getfieldFs6   '%%c**F  GVG*ajCF q NNEH"5)) /!=vac{;;A> !h,/H .vay>> !h,/H .XXc7++F JJv   ! $|S  r-Nrr,r-r.rrAs-!!!!!r-rc:eZdZdZdZeddddddgZd S) BGPPAOriginzN Packet handling the ORIGIN attribute value. References: RFC 4271 roriginrIGPEGP INCOMPLETEr:N)r'r(r)r*rr rr,r-r.rrjsB D hu<#H#HIIKKKKr-rAS_SET AS_SEQUENCEAS_CONFED_SEQUENCE AS_CONFED_SET)r[r1r2r}ceZdZdZdZdS)ASPathSegmentPacketListFieldz4 PacketListField handling AS_PATH segments. c4g}|}|rt|d}tjr!|dd|dzz}|d|dzzd}n |dd|dzz}|d|dzzd}|||}|||||fS)Nr[r1r})r"bgp_module_confr+rpr)r=rHrirrsegment_lengthrrs r.rsz%ASPathSegmentPacketListField.getfields !^^N. 9 !8!nq&8"8!89NQ$6 6 7 78 !8!nq&8"8!89NQ$6 6 7 78XXc7++F JJv    s{r-Nrr,r-r.rrs-r-rcReZdZdZdZGddeZdZedgegZ dS) BGPPAASPathz~ Packet handling the AS_PATH attribute value (2 bytes ASNs, for old speakers). References: RFC 4271, RFC 5065 i[c veZdZdZeddeeddedgeddgZ d Z dS) BGPPAASPath.ASPathSegmentzT Provides an implementation for AS_PATH segments with 2 bytes ASNs. segment_typer1rN segment_valuerrc|j}|9t|j}|ddt|z|ddz}||zSNr[r1rrrr#r=r"r# segment_lens r.r$z$BGPPAASPath.ASPathSegment.post_buildP-K"!$"455 bqbEC ,,,qu4s7Nr-) r'r(r)r*r as_path_segment_typesr rr rr$r,r-r. ASPathSegmentrsu  M.!-B C C I& - - N?B 5!0D0D E E      r-rzAS_PATH (RFC 4271)segmentsN) r'r(r)r*AS_TRANSrrrrrr,r-r.rrsj H& D$$Z]CCEKKKr-rcNeZdZdZGddeZdZedgegZdS)BGPPAAS4BytesPathz Packet handling the AS_PATH attribute value (4 bytes ASNs, for new speakers -> ASNs are encoded as IntFields). References: RFC 4893 c veZdZdZeddeeddedgeddgZ d Z dS) BGPPAAS4BytesPath.ASPathSegmentzT Provides an implementation for AS_PATH segments with 4 bytes ASNs. rr1rNrrrc|j}|9t|j}|ddt|z|ddz}||zSrrrs r.r$z*BGPPAAS4BytesPath.ASPathSegment.post_buildrr-) r'r(r)r*r rr rrrr$r,r-r.rrsv  %}^Q8MNN y!1488%~or88E1;M;MNNP      r-rzAS_PATH (RFC 4893)rN) r'r(r)r*rrrrrr,r-r.rrsc " D$$Z]CCEKKKr-rc0eZdZdZdZeddgZdS) BGPPANextHopzP Packet handling the NEXT_HOP attribute value. References: RFC 4271 rnext_hoprNr'r(r)r*rrrr,r-r.rrs3 D7:y112KKKr-rc0eZdZdZdZeddgZdS)BGPPAMultiExitDisczW Packet handling the MULTI_EXIT_DISC attribute value. References: RFC 4271 rmedrNr'r(r)r*rrrr,r-r.rrs3 D8E1%%&KKKr-rc0eZdZdZdZeddgZdS)BGPPALocalPrefzR Packet handling the LOCAL_PREF attribute value. References: RFC 4271 r local_prefrNrr,r-r.r r s3 D8L!,,-KKKr-r ceZdZdZdZdS)BGPPAAtomicAggregatezX Packet handling the ATOMIC_AGGREGATE attribute value. References: RFC 4271 rNr8r,r-r.r r  s DDDr-r cFeZdZdZdZeddeddgZdS)BGPPAAggregatorzR Packet handling the AGGREGATOR attribute value. References: RFC 4271 raggregator_asnrspeaker_addressrN)r'r(r)r*rr rrr,r-r.rrsF D:.227,i88:KKKr-r NO_EXPORT NO_ADVERTISENO_EXPORT_SUBCONFEDNOPEERz planned-shutz ACCEPT-OWNROUTE_FILTER_TRANSLATED_v4ROUTE_FILTER_v4ROUTE_FILTER_TRANSLATED_v6ROUTE_FILTER_v6 LLGR_STALENO_LLGRzaccept-own-nexthop) lllllllllllllc2eZdZdZdZeddegZdS)BGPPACommunityzS Packet handling the COMMUNITIES attribute value. References: RFC 1997 COMMUNITIES communityrN)r'r(r)r*rrwell_known_communitiesrr,r-r.rr:s6 D< Q0FGGHKKKr-rc0eZdZdZdZeddgZdS)BGPPAOriginatorIDzU Packet handling the ORIGINATOR_ID attribute value. References: RFC 4456 r originator_idrNrr,r-r.r"r"Hs3 D7?I667KKKr-r"cFeZdZdZdZedgeddgZdS)BGPPAClusterListzT Packet handling the CLUSTER_LIST attribute value. References: RFC 4456 r cluster_list cluster_idrN)r'r(r)r*rrrrr,r-r.r%r%VsD D~r88L!+D+DEEGKKKr-r%z3Transitive Two-Octet AS-Specific Extended Communityz3Transitive IPv4-Address-Specific Extended Communityz4Transitive Four-Octet AS-Specific Extended Communityz$Transitive Opaque Extended Communityz QoS MarkingzCoS CapabilityEVPN Unassignedz(Flow spec redirect/mirror to IP next-hopz7Non-Transitive Two-Octet AS-Specific Extended Communityz7Non-Transitive IPv4-Address-Specific Extended Communityz8Non-Transitive Four-Octet AS-Specific Extended Communityz(Non-Transitive Opaque Extended Communityz6Generic Transitive Experimental Use Extended Communityrz=Generic Transitive Experimental Use Extended Community Part 2z=Generic Transitive Experimental Use Extended Community Part 3z MAC Mobilityz ESI LabelzES-Import Route Targetz$EVPN Router"s MAC Extended CommunityzLayer 2 Extended CommunityzE-TREE Extended CommunityzDF Election Extended CommunityzI-SID Extended Community)rr[r1r2r}rrr4z Route Targetz Route OriginzOSPF Domain IdentifierzBGP Data Collectionz Source ASzL2VPN IdentifierzCisco VPN-Distinguisher)r1r2r}rr5rrr0z!Link Bandwidth Extended Communityz-Virtual-Network Identifier Extended Community)r}rGenericzCisco VPN Identifier)r1r2r}rr5rr0z OSPF Route IDzVRF Route ImportzFlow-spec Redirect to IPv4z"Inter-Area P2MP Segmented Next-Hop) r1r2rr4rrrr0rzCost Communityz"Extranet Source Extended Communityz&Extranet Separation Extended CommunityzOSPF Route Typez&Additional PMSI Tunnel Attribute FlagszColor Extended Communityz Encapsulation Extended CommunityzDefault Gatewayz)Point-to-Point-to-Multipoint (PPMP) LabelzRoute-Target RecordzConsistent Hash Sort Order) r[r2r}rrr4rrrrr/rzBGP Origin Validation State)rr[zOSPF Route Type (deprecated)zOSPF Router ID (deprecated)z#OSPF Domain Identifier (deprecated)zFlow spec traffic-ratezFlow spec traffic-actionz"Flow spec redirect AS-2byte formatzFlow spec traffic-remarkingzLayer2 Info Extended Communityz E-Tree Info) rr[rrr4r5rrrzFlow spec redirect IPv4 formatz"Flow spec redirect AS-4byte formatzTerminal ActionSample)/.z$OSPFv3 Route Attributes (DEPRECATED)zFlow-spec Redirect to IPv6zUUID-based Route Target)r1r2r}rrr0rr) rr[r1r2rrrrrrrr@cFeZdZdZdZeddeddgZdS)BGPPAExtCommTwoOctetASSpecificzt Packet handling the Two-Octet AS Specific Extended Community attribute value. References: RFC 4360 z(Two-Octet AS Specific Extended Communityglobal_administratorrlocal_administratorNr'r(r)r*rr rrr,r-r.r/r/sF 6D )1--xx8Mq/Q/QSKKKr-r/cFeZdZdZdZeddeddgZdS)BGPPAExtCommFourOctetASSpecificzu Packet handling the Four-Octet AS Specific Extended Community attribute value. References: RFC 5668 z)Four-Octet AS Specific Extended Communityr0rr1Nr'r(r)r*rrr rr,r-r.r4r4!sF 7D'++ZZ8Mq-Q-QSKKKr-r4cFeZdZdZdZeddeddgZdS)BGPPAExtCommIPv4AddressSpecificzt Packet handling the IPv4 Address Specific Extended Community attribute value. References: RFC 4360 z(IPv4 Address Specific Extended Communityr0rr1Nr5r,r-r.r7r7-sF 6D'++ZZ8Mq-Q-QSKKKr-r7c4eZdZdZdZedddgZdS)BGPPAExtCommOpaqueza Packet handling the Opaque Extended Community attribute value. References: RFC 4360 zOpaque Extended CommunityvaluerhrrjN)r'r(r)r*rrrr,r-r.r9r99s9 'D##GR:::;KKKr-r9cFeZdZdZdZeddeddgZdS)BGPPAExtCommTrafficRatezd Packet handling the (FlowSpec) "traffic-rate" extended community. References: RFC 5575 z(FlowSpec traffic-rate extended communityidrrateN)r'r(r)r*rr rrr,r-r.r<r<GsD 6D 4vq!!KKKr-r<cbeZdZdZdZedddedddedddgZd S) BGPPAExtCommTrafficActionzf Packet handling the (FlowSpec) "traffic-action" extended community. References: RFC 5575 z*FlowSpec traffic-action extended communityrqrr-sampler[terminal_actionN)r'r(r)r*rrrr,r-r.r@r@TsZ 8DQ##1a  "Aq))KKKr-r@cFeZdZdZdZeddeddgZdS)BGPPAExtCommRedirectAS2Bytezx Packet handling the (FlowSpec) "redirect AS-2byte" extended community (RFC 7674). References: RFC 7674 z-FlowSpec redirect AS-2byte extended communityrrr:Nr2r,r-r.rDrDbsD ;D 5!!KKKr-rDcFeZdZdZdZeddeddgZdS)BGPPAExtCommRedirectIPv4zu Packet handling the (FlowSpec) "redirect IPv4" extended community. (RFC 7674). References: RFC 7674 z)FlowSpec redirect IPv4 extended communityip_addrrr:Nr5r,r-r.rFrFpsD 7DA 7AKKKr-rFcFeZdZdZdZeddeddgZdS)BGPPAExtCommRedirectAS4Bytezy Packet handling the (FlowSpec) "redirect AS-4byte" extended community. (RFC 7674). References: RFC 7674 z-FlowSpec redirect AS-4byte extended communityrrr:Nr5r,r-r.rIrI~sD ;D 7AKKKr-rIc4eZdZdZdZedddegZdS)BGPPAExtCommTrafficMarkingzg Packet handling the (FlowSpec) "traffic-marking" extended community. References: RFC 5575 z+FlowSpec traffic-marking extended communitydscp0N)r'r(r)r*rr _ext_comm_traffic_action_fieldsrr,r-r.rKrKs: 9D VR%DEEKKKr-rKrr)r[r)r1r)r2r)rr)rr4)rr5)rr)rr5)r@r5c&eZdZdZdgZddZdZdS)_ExtCommValuePacketFieldzB PacketField handling Extended Communities "value parts". type_fromrOcBtj||||||_dSrT)rrrR)r=rrrrRs r.rz!_ExtCommValuePacketField.__init__s$T4#666"r-cnd}||\}}|dks|dkrt|}n|dks|dkrt|}n|dks|dkrt|}n|dks|dkrt |}n|d krX|d krt |}n|d krt |}nx|d krt|}nb|d krt|}nL|dkr|d krt|}n0|dkr|d krt|}ntj |}|S)Nrrr[rr1rr2rrrr4r5rrr@) rRr/r7r4r9r<r@rDrKrFrIr r')r=rHrzr type_hightype_lows r.rpz_ExtCommValuePacketField.m2is}"nnS11 8    T 1 1033CC $  )t"3"31!44CC $  )t"3"31!44CC $  )t"3"3$Q''CC $  4-a00T!!/22T!!1!44T!!033 $  4.q11 $  41!44.##C r-N)rO)r'r(r)r*rrrpr,r-r.rQrQsJ I####,,,,,r-rQcFeZdZdZdZeddeddgZdS)BGPPAIPv6AddressSpecificExtCommz Provides an implementation of the IPv6 Address Specific Extended Community attribute. This attribute is not defined using the existing BGP Extended Community attribute (see the RFC 5701 excerpt below). References: RFC 5701 rr0::r1rN)r'r(r)r*rrr rr,r-r.rXrXsG 6D'.. ;PRS0T0TVKKKr-rXc8t|iS)z Returns a ByteEnumField with the right sub-types dict for a given community. # noqa: E501 http://www.iana.org/assignments/bgp-extended-communities/bgp-extended-communities.xhtml )_ext_comm_subtypes_classesr)rUs r._get_ext_comm_subtyper\s & ) ))R 8 88r-c&eZdZdZdgZddZdZdS) _TypeLowFieldzG Field used to retrieve "dynamically" the right sub-type dict. enum_fromNcBtj|||||_dS)Nrr)r rr_)r=rrr_s r.rz_TypeLowField.__init__s%4dG<<<<"r-cX||}|||SrT)r_r)r=rHrQenums r.rWz_TypeLowField.i2reprs%~~c""xx1~~r-rT)r'r(r)r*rrrWr,r-r.r^r^sJ I####r-r^creZdZdZdZeddeeddded de d gZ d Z dS) BGPPAExtCommunityzd Provides an implementation of the Extended Communities attribute. References: RFC 4360 EXTENDED_COMMUNITYrUrrVNc*t|jSrT)r\rUxs r.rzBGPPAExtCommunity.s 5ak B Br-)r_r:c|j|jfSrT)rUrVrhs r.rzBGPPAExtCommunity.saj 9r-)rRc|j |dd}|jY|jRt|jjd\}}t |t |z|ddz}||zS)Nr1rO)r:rV_ext_high_low_dictrrr#)r=r"r#highlows r.r$zBGPPAExtCommunity.post_buildsp : "1"A = TZ%;*..tz/C\RRID#D CHH$qu,A3wr-) r'r(r)r*rr _ext_comm_typesr^rQrrr$r,r-r.reres D k1o66  BB   !   99     Kr-receZdZdZdZdS)_ExtCommsPacketListFieldzB PacketListField handling a list of extended communities. cg}t|}|d|}|rA|dd}|dd}|||}|||A||fS)Nr5)rrpr)r=rHrirrrrrrs r.rsz!_ExtCommsPacketListField.getfield*s|Q7F7 RaRjGABBZFXXc7++F JJv      s{r-Nrr,r-r.rqrq%s-     r-rqc2eZdZdZdZedgegZdS) BGPPAExtCommsz< Packet handling the multiple extended communities. EXTENDED_COMMUNITIESextended_communitiesN)r'r(r)r*rrqrerr,r-r.rtrt8s? "D  "    KKKr-rtceZdZdZdZdS)MPReachNLRIPacketListFieldz PacketListField handling the AFI specific part (except for the length of Next Hop Network Address field, which is not AFI specific) of the MP_REACH_NLRI attribute. c g}|}|jdkrq|jdkrf|rdt|d}|dzdz}|d|dz}||dzd}|||}|||d||fS)Nr1r[rr4r5)rprrr"rpr) r=rHrirrr>length_in_bytesrrs r.rsz#MPReachNLRIPacketListField.getfieldNs 7a<<x1}}'vay>>D'+axAoO$%9o&9%9:G#Oa$7$8$89F!XXc733FJJv&&& 's{r-Nrr,r-r.rxrxGs- r-rxc DeZdZdZdZeddeeddee dde e ddd e e d d d e e d d de e dd de dde dgeg ZdZdS)BGPPAMPReachNLRIzk Packet handling the MP_REACH_NLRI attribute value, for non IPv6 AFI. References: RFC 4760 rrprrr nh_addr_len nh_v4_addrrc.|jdko |jdkS)Nr[r}rpr}rhs r.rzBGPPAMPReachNLRI.ns15A:#D!-12Dr- nh_v6_addrrYc.|jdko |jdkS)Nr1r0rrhs r.rzBGPPAMPReachNLRI.p15A:#E!-22Er- nh_v6_globalc.|jdko |jdkSNr1rrrhs r.rzBGPPAMPReachNLRI.rrr-nh_v6_link_localc.|jdko |jdkSrrrhs r.rzBGPPAMPReachNLRI.trr-rqnlric.|j |dd}||zSNr2)rr=r"r#s r.r$zBGPPAMPReachNLRI.post_buildxs 9 "1"A3wr-N)r'r(r)r*rrrsr rtr rrrrxrrr$r,r-r.r|r|as' Dua!;<< fa11 -##y99DD F F,55EE G G.$77EE G G"4d;;EE G G *a  ""62|<< >Kr-r|c2eZdZdZdZedgdgZdS)BGPPAMPUnreachNLRI_IPv6zL Packet handling the MP_UNREACH_NLRI attribute value, for IPv6 AFI. zMP_UNREACH_NLRI (IPv6 NLRI)withdrawn_routesrN)r'r(r)r*rrrr,r-r.rrs7 )D))*%,FGG =O<<++,?vNNPKr-rc eZdZdZdZedddddedd ed ged d gZ d Z d S) BGPPAAS4Pathze Provides an implementation of the AS4_PATH attribute "value part". References: RFC 4893 rrr1rrr[r1rNrrrc|j9t|j}|ddt|z|ddz}||zSrrrs r.r$zBGPPAAS4Path.post_buildsK   &d011K"1"K(((1QRR50A3wr-) r'r(r)r*rr r rrrr$r,r-r.rrs D  ] + +   "D))HHUA,>,>??Kr-rcXeZdZdZeddeddeddgZdS)BGPLargeCommunitySegmentze Provides an implementation for LARGE_COMMUNITY segments which holds 3*4 bytes integers. r0Nlocal_data_part1local_data_part2)r'r(r)r*rrr,r-r.rrsQ '..#T**#T**KKKr-rc2eZdZdZdZedgegZdS)BGPPALargeCommunityzi Provides an implementation of the LARGE_COMMUNITY attribute. References: RFC 8092, RFC 8195 rrN)r'r(r)r*rrrrr,r-r.rrs6 D"?:r3KLLMKKKr-rcFeZdZdZdZeddeddgZdS)BGPPAAS4Aggregatorzo Provides an implementation of the AS4_AGGREGATOR attribute "value part". References: RFC 4893 zAS4_AGGREGATOR rrrrN)r'r(r)r*rrrrr,r-r.rrsF D8,a007,i88:KKKr-rceZdZdZdZdS)_PathAttrPacketFieldz: PacketField handling path attribute value parts. cd}|j}|dks|dkrtj|}n|dkr|dks|dkr|dks |dkr|dkrtj|}ns|d krtjst |}nQ|d krt |}n;tt |tj|}|S) Nrr!')rr1r) type_coder r'rr+rrr_path_attr_objectsr)r=rHrzrrs r.rpz_PathAttrPacketField.m2isM  >>Y#--.##CC2oo)r// "__c!1!1c!!i3&6&6.##CCD  )H '**d"")!,,Gh&**9dnEEGGGHJJ r-Nrr,r-r.rr s-r-rc eZdZdZdZedddgdeddeee dd d ee d d d e d d e gZ dZd S) BGPPathAttrzU Provides an implementation of the path attributes. References: RFC 4271 type_flagsrr5)NA0NA1NA2NA3zExtended-LengthPartial TransitiveOptionalrr attr_ext_lenNc<|jduot|jSrTrrrhs r.rzBGPPathAttr.?s"al$..  - -r-rc>|jduot|j SrTrrhs r.rzBGPPathAttr.Ds$al$..  - -4.r- attributecd}d}d}d}|j@|jtvr t|j}nd}t |}nt |j}| |dd}nt jd||dz}|j1|jd}n'|rt|dz }nt|dz }||r||ddz}n?||dz}n3|r|t jd |z}n|t jd|z}|r|j ||ddz}n|j ||ddz}||zS) NFrr1rr[rr}r2r ) rrattributes_flagsrrrcrdrrr)r=r"r# flags_valuerrrextended_lengths r.r$zBGPPathAttr.post_buildJs  ? "~!111.224>BB # 1+>>OO1$/BBO  rrUFF[{33ad:F = ~%"( VVaZFF VVaZF > '!AaC&!A$ <&+dF";";;&+dF";";;  (~)!ABB%~)!ABB%|r-)r'r(r)r*rrr path_attributesrr r rrrr$r,r-r.rr*s D <q + + +   k1o66 J~t , , . .   Ij$ ' ' . .  [$77-K277777r-rc eZdZdZdZeddddedgdd ed dd ded ged edgdgZ dZ dS)r zR UPDATE messages allow peers to exchange routes. References: RFC 4271 rwithdrawn_routes_lenNrr rrc|jSrT)rrks r.rzBGPUpdate.s !"8r-r path_attr_len path_attrc|jSrT)rrks r.rzBGPUpdate.rr-rcd}d}|jNtt||j}|ddt jd|z|ddz}n|j}|jStt||j}|dd|zt jd|z|d|zdz}||zS)Nc t|SrT)rrks r.rz&BGPUpdate.post_build..s s1vvr-rhrr r1r})rsummaprrcrdrr)r=r"r# subpacklenrwlrrs r.r$zBGPUpdate.post_builds%%   $ ,ST%:;;<* rr-rd) depends_onrfdataNra) r'r(r)r*rr _error_codesr_error_subcodesrrr,r-r.rr sq D lA|44  --     fd+++ KKKr- IMMEDIATEDEFERrADDREMOVEz REMOVE-ALLPERMITDENYc|a|adS)zM Helper function that sets the afi / safi values of ORP entries. N)_orf_entry_afi_orf_entry_safirprrs r._update_orf_afi_safirL sNOOOr-ceZdZdZddgZdZedddeeddd ee d dd e d d gZ fdZ xZ S) BGPORFEntryzN Provides an implementation of an ORF entry. References: RFC 5291 rprrz ORF entryactionrr1matchr[rqrr:rhc|dd|_|dd|_tt|j|i|dS)Nrpr[rr)poprprrrrr)r=rrrs r.rzBGPORFEntry.__init__g sU::eQ''JJvq)) )k4  )4:6:::::r-)r'r(r)r*rrr _orf_actions _orf_matchrrrrrrs@r.rrY sI D Xq!\22 WaJ//Q""" K;;;;;;;;;r-rceZdZdZdZdS)_ORFNLRIPacketFieldz, PacketField handling the ORF NLRI. cd}|jdkrt|}n/|jdkrt|}ntj|}|Sr)rprrr r'rs r.rpz_ORFNLRIPacketField.m2ir sM 7a<<q//CC W\\q//CC.##C r-Nrr,r-r.rrm s-r-rc eZdZdZdZedddeedddeeddd e d de d de d de d de gZ dS)BGPORFAddressPrefixzJ Provides an implementation of the Address Prefix ORF (RFC 5292). rurrr1rr[rqrsequencemin_lenmax_lenrrhN)r'r(r)r*rr rrrrr rrrr,r-r.rr s D Xq!\22 WaJ//Q""Q )Q )QHb&11KKKr-rceZdZdZdZedddeedddeeddd e d de d de d de d de dde dde dde g ZdS)BGPORFCoveringPrefixz> Provides an implementation of the CP-ORF (RFC 7543). rvrrr1rr[rqrrrrrt import_rt route_type host_addrN)r'r(r)r*rr rrrrr rrrrr,r-r.rr s D Xq!\22 WaJ//Q""Q )Q )Q $ +q!! ,"" Kv.. KKKr-rceZdZdZdZdZdS)BGPORFEntryPacketListFieldz3 PacketListField handling the ORF entries. c.d}t|jtr|jj}|jj}nd}d}|jdks |jdkrt |||}n2|jdkrt|||}ntj |}|S)Nr[rrrr) isinstance underlayerrrprrr}rrr r')r=rHrzrrprrs r.rpzBGPORFEntryPacketListField.m2i s cno 6 6 .$C>&DDCD <2  !4!4%aSt<< s!)r-r) r'r(r)r*rr _orf_when_to_refreshrrrrrr,r-r.rr s D ',@AA j!Z00 iEEE""   ++    KKKr-rz Route-RefreshBoRREoRR)rr[r1rc eZdZdZdZeddeeddeedde e e dd e d gZ d S) rze Provides an implementation of the ROUTE-REFRESH message. 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