ÿØÿà JFIF    ÿÛ „  ( %"1!%)+...383,7(-.+  -+++--++++---+-+-----+---------------+---+-++7-----ÿÀ  ß â" ÿÄ     ÿÄ H    !1AQaq"‘¡2B±ÁÑð#R“Ò Tbr‚²á3csƒ’ÂñDS¢³$CÿÄ   ÿÄ %  !1AQa"23‘ÿÚ   ? ôÿ ¨pŸªáÿ —åYõõ\?àÒü©ŠÄï¨pŸªáÿ —åYõõ\?àÓü©ŠÄá 0Ÿªáÿ Ÿå[úƒ ú®ði~TÁbqÐ8OÕpÿ ƒOò¤Oè`–RÂáœá™êi€ßÉ< FtŸI“öÌ8úDf´°å}“¾œ6  öFá°y¥jñÇh†ˆ¢ã/ÃÐ:ªcÈ "Y¡ðÑl>ÿ ”ÏËte:qž\oäŠe÷󲍷˜HT4&ÿ ÓÐü6ö®¿øþßèô Ÿ•7Ñi’•j|“ñì>b…þS?*Óôÿ ÓÐü*h¥£ír¶ü UãSç‚Ÿ[AÐaè[ûª•õ&õj?†Éö+EzP—WeÒírJFt ‘BŒ†Ï‡%#tE Øz ¥OÛ«!1›üä±Í™%ºÍãö]°î(–:@<‹ŒÊö×òÆt¦ãº+‡¦%ÌÁ²h´OƒJŒtMÜ>ÀÜÊw3Y´•牋4ǍýʏTì>œú=Íwhyë,¾Ôò×õ¿ßÊa»«þˆѪQ|%6ž™A õ%:øj<>É—ÿ Å_ˆCbõ¥š±ý¯Ýƒï…¶|RëócÍf溪“t.СøTÿ *Ä¿-{†çàczůŽ_–^XþŒ±miB[X±d 1,é”zEù»& î9gœf™9Ð'.;—™i}!ôšåîqêÛ٤ёý£½ÆA–àôe"A$˝Úsäÿ ÷Û #°xŸëí(l »ý3—¥5m! rt`†0~'j2(]S¦¦kv,ÚÇ l¦øJA£Šƒ J3E8ÙiŽ:cÉžúeZ°€¯\®kÖ(79«Ž:¯X”¾³Š&¡* ….‰Ž(ÜíŸ2¥ª‡×Hi²TF¤ò[¨íÈRëÉ䢍mgÑ.Ÿ<öäS0í„ǹÁU´f#Vß;Õ–…P@3ío<ä-±»Ž.L|kªÀê›fÂ6@»eu‚|ÓaÞÆŸ…¨ááå>åŠ?cKü6ùTÍÆ”†sĤÚ;H2RÚ†õ\Ö·Ÿn'¾ ñ#ºI¤Å´%çÁ­‚â7›‹qT3Iï¨ÖÚ5I7Ë!ÅOóŸ¶øÝñØôת¦$Tcö‘[«Ö³šÒ';Aþ ¸èíg A2Z"i¸vdÄ÷.iõ®§)¿]¤À†–‡É&ä{V¶iŽ”.Ó×Õÿ û?h¬Mt–íª[ÿ Ñÿ ÌV(í}=ibÔ¡›¥¢±b Lô¥‡piη_Z<‡z§èŒ)iÖwiÇ 2hÙ3·=’d÷8éŽ1¦¸c¤µ€7›7Ø ð\á)} ¹fËí›pAÃL%âc2 í§æQz¿;T8sæ°qø)QFMð‰XŒÂ±N¢aF¨…8¯!U  Z©RÊ ÖPVÄÀÍin™Ì-GˆªÅËŠ›•zË}º±ŽÍFò¹}Uw×#ä5B¤{î}Ð<ÙD é©¤&‡ïDbàÁôMÁ." ¤‡ú*õ'VŽ|¼´Úgllº¼klz[Æüï÷Aób‡Eÿ dÑ»Xx9ÃÜ£ÁT/`¼¸vI±Ýµ·Ë‚“G³þ*Ÿû´r|*}<¨îºœ @¦mÄ’M¹”.œ«Y–|6ÏU¤jç¥ÕÞqO ˜kDÆÁ¨5ÿ š;Њ¦¦€GÙk \ –Þ=â¼=SͧµªS°ÚÍpÜãQűÀõ¬?ÃÁ1Ñ•õZà?hóœ€ L¦l{Y*K˜Ù›zc˜–ˆâ ø+¾ ­-Ök¥%ùEÜA'}ˆ><ÊIè“bpÍ/qÞâvoX€w,\úªò6Z[XdÒæ­@Ö—€$òJí#é>'°Ú ôª˜<)4ryÙ£|óAÅn5žêŸyÒäMÝ2{"}‰–¤l÷ûWX\l¾Á¸góÉOÔ /óñB¤f¸çñ[.P˜ZsÊË*ßT܈§QN¢’¡¨§V¼(Üù*eÕ“”5T¨‹Âê¥FŒã½Dü[8'Ò¥a…Ú¶k7a *•›¼'Ò·\8¨ª\@\õ¢¦íq+DÙrmÎ…_ªæ»ŠÓœ¡¯’Ré9MÅ×D™lælffc+ŒÑ,ý™ÿ ¯þǤ=Å’Á7µ÷ÚÛ/“Ü€ñýã¼àí¾ÕÑ+ƒ,uµMâÀÄbm:ÒÎPæ{˜Gz[ƒ¯«® KHà`ßØŠéí¯P8Aq.C‰ à€kòpj´kN¶qô€…Õ,ÜNŠª-­{Zö’æû44‰sŽè‰îVíRœÕm" 6?³D9¡ÇTíÅꋇ`4«¸ÝÁô ï’ýorqКÇZ«x4Žâéþuïf¹µö[P ,Q£éaX±`PÉÍZ ¸äYúg üAx ’6Lê‚xÝÓ*äQ  Ï’¨hÍ =²,6ï#rÃ<¯–£»ƒ‹,–ê•€ aÛsñ'%Æ"®ÛüìBᝠHÚ3ß°©$“XnœÖ’î2ËTeûìxîß ¦å¿çÉ ðK§þ{‘t‚Ϋ¬jéîZ[ ”š7L¥4VÚCE×]m¤Øy”ä4-dz£œ§¸x.*ãÊÊ b÷•h:©‡¦s`BTÁRû¾g⻩‹jø sF¢àJøFl‘È•Xᓁà~*j¯ +(ÚÕ6-£¯÷GŠØy‚<Ç’.F‹Hœw(+)ÜÜâÈzÄäT§FߘãÏ;DmVœ3Àu@mÚüXÝü•3B¨òÌÁÛ<·ÃÜ z,Ì@õÅ·d2]ü8s÷IôÞ¯^Ç9¢u„~ëAŸï4«M? 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""" import re from functools import partial from ovs.flow.flow import Flow, Section from ovs.flow.kv import ( KVParser, KVDecoders, nested_kv_decoder, decode_nested_kv, ) from ovs.flow.decoders import ( decode_default, decode_time, decode_int, decode_mask, Mask8, Mask16, Mask32, Mask64, Mask128, IPMask, EthMask, decode_free_output, decode_flag, decode_nat, ) class ODPFlow(Flow): """ODPFLow represents a Open vSwitch Datapath flow. Attributes: ufid: The UFID section with only one key-value, with keyword "ufid". info: The info section. match: The match section. actions: The actions section. id: The id object given at construction time. """ """ These class variables are used to cache the KVDecoders instances. This will speed up subsequent flow parsings. """ _info_decoders = None _match_decoders = None _action_decoders = None @staticmethod def info_decoders(): """Return the KVDecoders instance to parse the info section. Uses the cached version if available. """ if not ODPFlow._info_decoders: ODPFlow._info_decoders = ODPFlow._gen_info_decoders() return ODPFlow._info_decoders @staticmethod def match_decoders(): """Return the KVDecoders instance to parse the match section. Uses the cached version if available. """ if not ODPFlow._match_decoders: ODPFlow._match_decoders = ODPFlow._gen_match_decoders() return ODPFlow._match_decoders @staticmethod def action_decoders(): """Return the KVDecoders instance to parse the actions section. Uses the cached version if available. """ if not ODPFlow._action_decoders: ODPFlow._action_decoders = ODPFlow._gen_action_decoders() return ODPFlow._action_decoders def __init__(self, odp_string, id=None): """Parse a odp flow string. The string is expected to have the following format: [ufid], [match] [flow data] actions:[actions] Args: odp_string (str): A datapath flow string. Returns: A ODPFlow instance. """ sections = [] # If UFID present, parse it and add it to it's own section. ufid_pos = odp_string.find("ufid:") if ufid_pos >= 0: ufid_string = odp_string[ ufid_pos : (odp_string[ufid_pos:].find(",") + 1) ] ufid_parser = KVParser( ufid_string, KVDecoders({"ufid": decode_default}) ) ufid_parser.parse() if len(ufid_parser.kv()) != 1: raise ValueError("malformed odp flow: %s" % odp_string) sections.append( Section("ufid", ufid_pos, ufid_string, ufid_parser.kv()) ) action_pos = odp_string.find("actions:") if action_pos < 0: raise ValueError("malformed odp flow: %s" % odp_string) # rest of the string is between ufid and actions rest = odp_string[ (ufid_pos + len(ufid_string) if ufid_pos >= 0 else 0) : action_pos ] action_pos += 8 # len("actions:") actions = odp_string[action_pos:] field_parts = rest.lstrip(" ").partition(" ") if len(field_parts) != 3: raise ValueError("malformed odp flow: %s" % odp_string) match = field_parts[0] info = field_parts[2] iparser = KVParser(info, ODPFlow.info_decoders()) iparser.parse() isection = Section( name="info", pos=odp_string.find(info), string=info, data=iparser.kv(), ) sections.append(isection) mparser = KVParser(match, ODPFlow.match_decoders()) mparser.parse() msection = Section( name="match", pos=odp_string.find(match), string=match, data=mparser.kv(), ) sections.append(msection) aparser = KVParser(actions, ODPFlow.action_decoders()) aparser.parse() asection = Section( name="actions", pos=action_pos, string=actions, data=aparser.kv(), is_list=True, ) sections.append(asection) super(ODPFlow, self).__init__(sections, odp_string, id) def __str__(self): if self._orig: return self._orig else: return self.to_string() def to_string(self): """Return a text representation of the flow.""" string = "ufid: {}".format(self.ufid) if self.ufid else "" string += "Info: {} | ".format(self.info) string += "Match : {} | ".format(self.match) string += "Actions: {}".format(self.actions) return string @staticmethod def _gen_info_decoders(): """Generate the info KVDecoders.""" return KVDecoders(ODPFlow._info_decoders_args()) @staticmethod def _info_decoders_args(): """Generate the decoder args for the info KVDecoders.""" return { "packets": decode_int, "bytes": decode_int, "used": decode_time, "flags": decode_default, "dp": decode_default, } @staticmethod def _gen_action_decoders(): """Generate the action KVDecoders.""" return KVDecoders( ODPFlow._action_decoders_args(), default_free=decode_free_output ) @staticmethod def _action_decoders_args(): """Generate the arguments for the action KVDecoders.""" _decoders = { "drop": decode_flag, "lb_output": decode_int, "trunc": decode_int, "recirc": decode_int, "userspace": nested_kv_decoder( KVDecoders( { "pid": decode_int, "sFlow": nested_kv_decoder( KVDecoders( { "vid": decode_int, "pcp": decode_int, "output": decode_int, } ) ), "slow_path": decode_default, "flow_sample": nested_kv_decoder( KVDecoders( { "probability": decode_int, "collector_sed_id": decode_int, "obs_domain_id": decode_int, "obs_point_id": decode_int, "output_port": decode_default, "ingress": decode_flag, "egress": decode_flag, } ) ), "ipfix": nested_kv_decoder( KVDecoders( { "output_port": decode_default, } ) ), "controller": nested_kv_decoder( KVDecoders( { "reason": decode_int, "dont_send": decode_int, "continuation": decode_int, "recirc_id": decode_int, "rule_cookie": decode_int, "controller_id": decode_int, "max_len": decode_int, } ) ), "userdata": decode_default, "actions": decode_flag, "tunnel_out_port": decode_default, "push_eth": nested_kv_decoder( KVDecoders( { "src": EthMask, "dst": EthMask, "type": decode_int, } ) ), "pop_eth": decode_flag, } ) ), "set": nested_kv_decoder( KVDecoders(ODPFlow._field_decoders_args()) ), "push_vlan": nested_kv_decoder( KVDecoders( { "vid": decode_int, "pcp": decode_int, "cfi": decode_int, "tpid": decode_int, } ) ), "pop_vlan": decode_flag, "push_nsh": nested_kv_decoder( KVDecoders( { "flags": decode_int, "ttl": decode_int, "mdtype": decode_int, "np": decode_int, "spi": decode_int, "si": decode_int, "c1": decode_int, "c2": decode_int, "c3": decode_int, "c4": decode_int, "md2": decode_int, } ) ), "pop_nsh": decode_flag, "tnl_pop": decode_int, "ct_clear": decode_flag, "ct": nested_kv_decoder( KVDecoders( { "commit": decode_flag, "force_commit": decode_flag, "zone": decode_int, "mark": Mask32, "label": Mask128, "helper": decode_default, "timeout": decode_default, "nat": decode_nat, } ) ), **ODPFlow._tnl_action_decoder_args(), } _decoders["clone"] = nested_kv_decoder( KVDecoders(decoders=_decoders, default_free=decode_free_output) ) return { **_decoders, "sample": nested_kv_decoder( KVDecoders( { "sample": (lambda x: float(x.strip("%"))), "actions": nested_kv_decoder( KVDecoders( decoders=_decoders, default_free=decode_free_output, ) ), } ) ), "check_pkt_len": nested_kv_decoder( KVDecoders( { "size": decode_int, "gt": nested_kv_decoder( KVDecoders( decoders=_decoders, default_free=decode_free_output, ) ), "le": nested_kv_decoder( KVDecoders( decoders=_decoders, default_free=decode_free_output, ) ), } ) ), } @staticmethod def _tnl_action_decoder_args(): """Generate the decoder arguments for the tunnel actions.""" return { "tnl_push": nested_kv_decoder( KVDecoders( { "tnl_port": decode_default, "header": nested_kv_decoder( KVDecoders( { "size": decode_int, "type": decode_int, "eth": nested_kv_decoder( KVDecoders( { "src": EthMask, "dst": EthMask, "dl_type": decode_int, } ) ), "ipv4": nested_kv_decoder( KVDecoders( { "src": IPMask, "dst": IPMask, "proto": decode_int, "tos": decode_int, "ttl": decode_int, "frag": decode_int, } ) ), "ipv6": nested_kv_decoder( KVDecoders( { "src": IPMask, "dst": IPMask, "label": decode_int, "proto": decode_int, "tclass": decode_int, "hlimit": decode_int, } ) ), "udp": nested_kv_decoder( KVDecoders( { "src": decode_int, "dst": decode_int, "dsum": Mask16, } ) ), "vxlan": nested_kv_decoder( KVDecoders( { "flags": decode_int, "vni": decode_int, } ) ), "geneve": nested_kv_decoder( KVDecoders( { "oam": decode_flag, "crit": decode_flag, "vni": decode_int, "options": partial( decode_geneve, False ), } ) ), "gre": decode_tnl_gre, "erspan": nested_kv_decoder( KVDecoders( { "ver": decode_int, "sid": decode_int, "idx": decode_int, "dir": decode_int, "hwid": decode_int, } ) ), "gtpu": nested_kv_decoder( KVDecoders( { "flags": decode_int, "msgtype": decode_int, "teid": decode_int, } ) ), } ) ), "out_port": decode_default, } ) ) } @staticmethod def _gen_match_decoders(): """Generate the match KVDecoders.""" return KVDecoders(ODPFlow._match_decoders_args()) @staticmethod def _match_decoders_args(): """Generate the arguments for the match KVDecoders.""" return { **ODPFlow._field_decoders_args(), "encap": nested_kv_decoder( KVDecoders(ODPFlow._field_decoders_args()) ), } @staticmethod def _field_decoders_args(): """Generate the decoder arguments for the match fields.""" return { "skb_priority": Mask32, "skb_mark": Mask32, "recirc_id": decode_int, "dp_hash": Mask32, "ct_state": decode_default, "ct_zone": Mask16, "ct_mark": Mask32, "ct_label": Mask128, "ct_tuple4": nested_kv_decoder( KVDecoders( { "src": IPMask, "dst": IPMask, "proto": Mask8, "tcp_src": Mask16, "tcp_dst": Mask16, } ) ), "ct_tuple6": nested_kv_decoder( KVDecoders( { "src": IPMask, "dst": IPMask, "proto": Mask8, "tcp_src": Mask16, "tcp_dst": Mask16, } ) ), "tunnel": nested_kv_decoder( KVDecoders( { "tun_id": Mask64, "src": IPMask, "dst": IPMask, "ipv6_src": IPMask, "ipv6_dst": IPMask, "tos": Mask8, "ttl": Mask8, "tp_src": Mask16, "tp_dst": Mask16, "erspan": nested_kv_decoder( KVDecoders( { "ver": Mask8, "idx": Mask32, "sid": decode_int, "dir": Mask8, "hwid": Mask8, } ) ), "vxlan": nested_kv_decoder( KVDecoders( { "gbp": nested_kv_decoder( KVDecoders( { "id": Mask16, "flags": Mask8, } ) ) } ) ), "geneve": partial(decode_geneve, True), "gtpu": nested_kv_decoder( KVDecoders( { "flags": Mask8, "msgtype": Mask8, } ) ), "flags": decode_default, } ) ), "in_port": decode_default, "eth": nested_kv_decoder( KVDecoders( { "src": EthMask, "dst": EthMask, } ) ), "vlan": nested_kv_decoder( KVDecoders( { "vid": Mask16, "pcp": Mask16, "cfi": Mask16, } ) ), "eth_type": Mask16, "mpls": nested_kv_decoder( KVDecoders( { "label": Mask32, "tc": Mask32, "ttl": Mask32, "bos": Mask32, } ) ), "ipv4": nested_kv_decoder( KVDecoders( { "src": IPMask, "dst": IPMask, "proto": Mask8, "tos": Mask8, "ttl": Mask8, "frag": decode_default, } ) ), "ipv6": nested_kv_decoder( KVDecoders( { "src": IPMask, "dst": IPMask, "label": decode_mask(20), "proto": Mask8, "tclass": Mask8, "hlimit": Mask8, "frag": decode_default, } ) ), "tcp": nested_kv_decoder( KVDecoders( { "src": Mask16, "dst": Mask16, } ) ), "tcp_flags": decode_default, "udp": nested_kv_decoder( KVDecoders( { "src": Mask16, "dst": Mask16, } ) ), "sctp": nested_kv_decoder( KVDecoders( { "src": Mask16, "dst": Mask16, } ) ), "icmp": nested_kv_decoder( KVDecoders( { "type": Mask8, "code": Mask8, } ) ), "icmpv6": nested_kv_decoder( KVDecoders( { "type": Mask8, "code": Mask8, } ) ), "arp": nested_kv_decoder( KVDecoders( { "sip": IPMask, "tip": IPMask, "op": Mask16, "sha": EthMask, "tha": EthMask, } ) ), "nd": nested_kv_decoder( KVDecoders( { "target": IPMask, "sll": EthMask, "tll": EthMask, } ) ), "nd_ext": nested_kv_decoder( KVDecoders( { "nd_reserved": Mask32, "nd_options_type": Mask8, } ) ), "packet_type": nested_kv_decoder( KVDecoders( { "ns": Mask16, "id": Mask16, } ) ), "nsh": nested_kv_decoder( KVDecoders( { "flags": Mask8, "mdtype": Mask8, "np": Mask8, "spi": Mask32, "si": Mask8, "c1": Mask32, "c2": Mask32, "c3": Mask32, "c4": Mask32, } ) ), } def decode_geneve(mask, value): """Decode geneve options. Used for both tnl_push(header(geneve(options()))) action and tunnel(geneve()) match. It has the following format: {class=0xffff,type=0x80,len=4,0xa} Args: mask (bool): Whether masking is supported. value (str): The value to decode. """ if mask: decoders = { "class": Mask16, "type": Mask8, "len": Mask8, } def free_decoder(value): return "data", Mask128(value) else: decoders = { "class": decode_int, "type": decode_int, "len": decode_int, } def free_decoder(value): return "data", decode_int(value) result = [] for opts in re.findall(r"{.*?}", value): result.append( decode_nested_kv( KVDecoders(decoders=decoders, default_free=free_decoder), opts.strip("{}"), ) ) return result def decode_tnl_gre(value): """ Decode tnl_push(header(gre())) action. It has the following format: gre((flags=0x2000,proto=0x6558),key=0x1e241)) Args: value (str): The value to decode. """ return decode_nested_kv( KVDecoders( { "flags": decode_int, "proto": decode_int, "key": decode_int, "csum": decode_int, "seq": decode_int, } ), value.replace("(", "").replace(")", ""), )