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 functools from ovs.flow.decoders import ( decode_default, decode_time, decode_flag, decode_int, ) from ovs.flow.kv import nested_kv_decoder, KVDecoders, KeyValue, KVParser from ovs.flow.list import nested_list_decoder, ListDecoders from ovs.flow.ofp_fields import field_decoders def decode_output(value): """Decodes the output value. Does not support field specification. """ if len(value.split(",")) > 1: return nested_kv_decoder()(value) try: return {"port": int(value)} except ValueError: return {"port": value.strip('"')} def decode_controller(value): """Decodes the controller action.""" if not value: return KeyValue("output", "controller") else: # Try controller:max_len try: max_len = int(value) return { "max_len": max_len, } except ValueError: pass # controller(key[=val], ...) return nested_kv_decoder()(value) def decode_bundle_load(value): return decode_bundle(value, True) def decode_bundle(value, load=False): """Decode bundle action.""" result = {} keys = ["fields", "basis", "algorithm", "ofport"] if load: keys.append("dst") for key in keys: parts = value.partition(",") nvalue = parts[0] value = parts[2] if key == "ofport": continue result[key] = decode_default(nvalue) # Handle members: mvalues = value.split("members:") result["members"] = [int(port) for port in mvalues[1].split(",")] return result def decode_encap(value): """Decodes encap action. Examples: encap(ethernet) encap(nsh(md_type=2,tlv(0x1000,10,0x12345678))) The generated dict has the following keys: "header", "props", e.g: { "header": "ethernet", } { "header": "nsh", "props": { "md_type": 2, "tlv": { "class": 0x100, "type": 10, "value": 0x123456 } } } """ def free_hdr_decoder(free_val): if free_val not in ["ethernet", "mpls", "mpls_mc", "nsh"]: raise ValueError( "Malformed encap action. Unkown header: {}".format(free_val) ) return "header", free_val parser = KVParser( value, KVDecoders( { "nsh": nested_kv_decoder( KVDecoders( { "md_type": decode_default, "tlv": nested_list_decoder( ListDecoders( [ ("class", decode_int), ("type", decode_int), ("value", decode_int), ] ) ), } ) ), }, default_free=free_hdr_decoder, ), ) parser.parse() if len(parser.kv()) > 1: raise ValueError("Malformed encap action: {}".format(value)) result = {} if parser.kv()[0].key == "header": result["header"] = parser.kv()[0].value elif parser.kv()[0].key == "nsh": result["header"] = "nsh" result["props"] = parser.kv()[0].value return result def decode_field(value): """Decodes a field as defined in the 'Field Specification' of the actions man page: http://www.openvswitch.org/support/dist-docs/ovs-actions.7.txt.""" parts = value.strip("]\n\r").split("[") result = { "field": parts[0], } if len(parts) > 1 and parts[1]: field_range = parts[1].split("..") start = field_range[0] end = field_range[1] if len(field_range) > 1 else start if start: result["start"] = int(start) if end: result["end"] = int(end) return result def decode_load_field(value): """Decodes LOAD actions such as: 'load:value->dst'.""" parts = value.split("->") if len(parts) != 2: raise ValueError("Malformed load action : %s" % value) # If the load action is performed within a learn() action, # The value can be specified as another field. try: return {"value": int(parts[0], 0), "dst": decode_field(parts[1])} except ValueError: return {"src": decode_field(parts[0]), "dst": decode_field(parts[1])} def decode_set_field(field_decoders, value): """Decodes SET_FIELD actions such as: 'set_field:value/mask->dst'. The value is decoded by field_decoders which is a KVDecoders instance. Args: field_decoders(KVDecoders): The KVDecoders to be used to decode the field. """ parts = value.split("->") if len(parts) != 2: raise ValueError("Malformed set_field action : %s" % value) val = parts[0] dst = parts[1] val_result = field_decoders.decode(dst, val) return { "value": {val_result[0]: val_result[1]}, "dst": decode_field(dst), } def decode_move_field(value): """Decodes MOVE actions such as 'move:src->dst'.""" parts = value.split("->") if len(parts) != 2: raise ValueError("Malformed move action : %s" % value) return { "src": decode_field(parts[0]), "dst": decode_field(parts[1]), } def decode_dec_ttl(value): """Decodes dec_ttl and dec_ttl(id, id[2], ...) actions.""" if not value: return True return [int(idx) for idx in value.split(",")] def decode_chk_pkt_larger(value): """Decodes 'check_pkt_larger(pkt_len)->dst' actions.""" parts = value.split("->") if len(parts) != 2: raise ValueError("Malformed check_pkt_larger action : %s" % value) pkt_len = int(parts[0].strip("()")) dst = decode_field(parts[1]) return {"pkt_len": pkt_len, "dst": dst} # CT decoders def decode_zone(value): """Decodes the value of the 'zone' keyword (part of the ct action).""" try: return int(value, 0) except ValueError: pass return decode_field(value) def decode_exec(action_decoders, value): """Decodes the value of the 'exec' keyword (part of the ct action). Args: decode_actions (KVDecoders): The decoders to be used to decode the nested exec. value (string): The string to be decoded. """ exec_parser = KVParser(value, action_decoders) exec_parser.parse() return [{kv.key: kv.value} for kv in exec_parser.kv()] def decode_learn(action_decoders): """Create the decoder to be used to decode the 'learn' action. The learn action has two added complexities: 1) It can hold any valid action key-value. Therefore we must take the precalculated action_decoders and use them. That's why we require them as argument. 2) The way fields can be specified is augmented. Not only we have 'field=value', but we also have: - 'field=_src_' (where _src_ is another field name) - and just 'field' For this we need to create a wrapper of field_decoders that, for each "field=X" key-value we check if X is a field_name or if it's actually a value that we need to send to the appropriate field_decoder to process. Args: action_decoders (dict): Dictionary of decoders to be used in nested action decoding. """ def decode_learn_field(decoder, value): """Generates a decoder to be used for the 'field' argument of the 'learn' action. The field can hold a value that should be decoded, either as a field, or as a the value (see man(7) ovs-actions). Args: decoder (callable): The decoder. """ if value in field_decoders.keys(): # It's a field return value else: return decoder(value) learn_field_decoders = { field: functools.partial(decode_learn_field, decoder) for field, decoder in field_decoders.items() } learn_decoders = { **action_decoders, **learn_field_decoders, "idle_timeout": decode_time, "hard_timeout": decode_time, "priority": decode_int, "cookie": decode_int, "send_flow_rem": decode_flag, "table": decode_int, "delete_learned": decode_flag, "limit": decode_int, "result_dst": decode_field, } return functools.partial(decode_exec, KVDecoders(learn_decoders))