ÿØÿà JFIF    ÿÛ „ !.%+&8&+/1555$;@;4?.451 4,$,44444444444414444444444444444444444444444444444444ÿÀ  á á" ÿÄ     ÿÄ ?    !1AQaq"2‘¡±ÁðBRbrÑá#‚’¢²3S CñÿÄ   ÿÄ !    !1QAa‘2ÿÚ   ? 5˜Z¯V¦cø)›t/? z¨±>Õ5€¶‹Á¤·¼z¼Ü¬+ñ®v¤¨_ˆR­BFn©—˜ý®ç̝P8gýt·ÉSTŦˆìät?þé¼íìN/Þa)ì–í6ô… Ï¿øÃj´¿KÇü]ÿ ªô¹-eKànëÕHTx}ýSÜ›ÿ ”7Ø×&µ<¦  ¥ÑO¶[Ù¯ä¨ÞÃÿ PZ-¬;#õ|•oaÿ ©CìÞz3˜öː/¤­ñTûIØ}š^ mÓ%ªxˆ¥ÉŸu=Z+ISe¿45™¼u;ú&WØ÷€æßQ™®{|íx*TC“#ZŠìZ§²‹ 6pv…³¿¡äª*áZÐ%ÒOáˆo"x«OHk w±æ+¬V(kMúŸ5Vö«$ ÁrÏbàb57/luR ¸ÑÛj Òµì`Ðœq­û žICÀÊ•©4€Âcà¨Ï€O´<èÐ:›ù(Ë^L8þ‘ÍÌ#¸Ð_Ì©ÙK(Öz 4¬û+¸;ü’V’84‘¬ÃŽ:[â‡ÔÌáõp¢~§ªlæ£ö{®G>J¼"°‡7¯ÆÉèßû ‹É‹§ÁòÃýâßî ^ƾÙõ‹×óH#«LP½ïX=xÑÍ$|W?•~• îëÔ©ª‹ {ÝT…Kÿ ”hûâá)J*ö˜–ÔU;iÇ€/ ÆþjóZ\ýwØ=Ìm ºèËL9 ýèÆð/¨’¥öo=nË.%Îì ŽÕ¯È|{Oj²ƒE6e/ßdÄõ²Ìâ1O®ò×TsəԸhOMýíMˆ¿¼H˜l²,7Â¥#MF/Úf°Ö½± ¸–dr‹NýÊ íjqx{œÉ ä-È ¦ øÄër¨q°ð †nцýÑÄÆ’mä…n<0È™;ÁÝá¯ÁZƒ7FÀmì­ É&9ˆîéi¶ùN§Y• ÃZãAâ?•‡©‰ , ó¾IŸŠc1 4â&y­&pŠ­6;M À 0¹qç»p.á …ŸÅáK@%6·y6ƒ‰3?”úºŽ‰éX5ªPT §µ!=Mž«Ú½‹ÅgÂSâÉaþÓoö–¯ÁÔìR>5éÿ üs¶ÆUcÌ kÇR ]ÿ ù¬¼«VŽ;Â|‡~¢¦”ÏÅ°æ {L™Õ°Óv¹ò¸írŽ¡×¢CÃ!íVÕ {¶»sŒNPg/ "uÕbkm²“$ďå¿é¹§°½æz¯6 †s¿!s–wÚÝ“™Œ °.ûj>·+™Òa…©Œ&rÝÎtÛë긪Ît’LAVp%c Úý[ÄzJ¾ÇàXXç@˜ó<êL]·T˜¾¥1Ó©V‡g´æ½¦Ý@¹óø!_@´ÞâSÁ —S3™•& ]@JHÚý©ZŽ €×æÔr»Áf!‡yÞ4Mv*èÓã_{‘åóUuљØ«Oïé*®EvÑ Œ÷‡U \"㪒ÍK+À 4“M¡ï:0¥5í!'<@î´”>Ç»&Z–ïCCV˜Ì5Šo&îhè.žû |ÓK©h$s6KìŒëã)¹hI¦GïOåóI;ììü#É$Š0…Ææ¥TØ.5­¾gn´ “ÂÖ\:hœ89G)J@„}œ:’Ò{/Š"¦_Æ×7Æ3VÇŠÊa]ÚŒÙ€Ä–=®uÁßâACZƒ§§£ Qnâ:«,×{tyø¬iÛcœÜÄ€H½ÄÍCk´÷šß .W'b¤Íåh]÷€=,Žv×cÚEÚHXJX¶îo¨FÒtèöŸ>ªª6[J®Fµ£sGÁeqõfe\íjÒÐïÄÐGˆe1Ø‹.Ø”‘Ëuø Y­ˆÜ ŽG|zùªüMpDnQWÄ”%JŠ™)â*p@Örš«ÕT2Ð%ˆG#ª„ ·¤!°ŸOTÂT¸aÚ%4&h™LµšØüÐ.F¿²ÐÞ_Ç‚¾ÅÃaÜ÷09Æ q€öy˜v‡85õN÷]¬äѼóS{°_MŽ¬úÔ#°Ç¸0åÞè2ëôPcvÆw9®ií1Ä8F™˜à‰´+‰Ik1òÝ7“Ñ×ÒsÝ\x‚h`ÞÑ`ó"|µEcý£n˜h`}GÞ !±ù²Ápü²ß6 0ïi󜵩SÈÇ7˜-ÕURO˜¦´f$ªž-Í6(œ}<„ éc øs]ŽŽ„*—¾ ìdŽ„)méª\¿êÎIg¾ØÞ~I#C/¼¼´EÁÈŽi8“©õådô·>euä ƒ'Ê×लR1ÉJE1ÐAát`t;ÇР%Ý<‡¥„ÍÆ`×Oyó)õiI€ñQaŸ4Ûù\áàaÃÔ¹HÃu¹*k€¦<„e S‡&õÏ B!ŽhüÞ`yj}mªf×\¿ Ç~æ­9‡û\՞Ǖg²1Žû5V7 !àöšm° c`ܬøÇìµÒ'P"?…´Ö,"§^•õŽ¨sÔ)6˜sæéÍR¼ ò|Sl”‹7 nPW Gòú÷½§O¯‡„l¡kSÞŒr½PÊ@æ¢pŽ-mÿ #Ÿ˜Àº¶Áä¦;ïÔæ$1££`“Õ>„—·ž)ßð³ñ#Ï Ô$¶œ‰ÊE‹À;÷º ¯«P:Ñ”8–IÊtpÞ3ª“>ê“þës4ò2OÏÕ­±zô†Õ§‰.÷ä¸;¿˜“'œ›žª}«Œ{ª±Ì 9ÔóÞÕ‡0 $íWV3Üì¬ —@kÝ4@¿r¼±½¬™›?øØæ´'Áé®CË3-g$˜ö‡×auÚi´Žp/êÛ æF›Ú2v‹ã¿¿,nB1̨ƃqÞa5͝@&Æû“él÷ \C²½UÍc ¯k×¢U ÖéQå™—-r wô ÞÏ<Ò=&=ÿ Ôê Òêˈt,i—;LîÜ á¸*ÚÃ1$êL•LÍ <É)ýÐà’ ;F™{ƒ™˜€&'}‚ãÄK`¡ÞT@I;®žZóè‚s’7®°›+§O­Åq©é»²9<Ô J ¼9O’HL»Ùïì¸rk¼Ž_ý‘TŸu[²ßÚŒ·ü÷B%¯E ŸÔX5êO´ Ç•€’I0 ÉJX` ñ¹õ%;µŸD‘«´€àwÒ™U ûئžÖö\×®×´8 ½‡ºÐÆÓ§?Àkmœ=;d5*@-ì0F Rªýš[Ü6âö̃ڸr*KA9· u*µæ£?U¸Âêí†8@¦X4 e-ò„0s{ HâUpU?¼mñRa°®a%Ð'tÉ×’\¾ÊÉ]t›h>·(Ë@R¼¡Ãt h}’O÷au<+nT…Ö…MӐ??Óe95 q>í/;&JSû °¯ÊéÞ øƒ*Ã2½Ài&:nôUl=¾¿5eˆ3”ñc|Ú2V”>„»&eE;«ÚäC p¢Û úy 9š[ŒÌx¼擼A&DåÒ¯ˆ¤ÀÌ;"˜ ÏQä¸åhÊ}Ûq«Û0WžÒ|»€ø®öCm5•\ÇÀ§Pe3£]0ÃàLDÉ‰1øªxjgwT‚÷¿LΨK‹›ùs—xˆÜ±µ kæ¸f‰‰ÜGk/LÛØ6d9ò¶ùA{ƒA3š/¬D¬khÓk‰`˜"㯒r¿±Óã jx‡°e}<Ñø\3y:'À•/h½Í€Ç4~g ?Û(¼]v‘ªlKÎâ~?O‚W%{Ì:“'©úNq¾›úo(X’¥¯ˆ nFê{Ç€ü?º'ë ø‹ì Þ09ŒÌç9Æ —ËC`j@ÓÄ(+a‹un¸#ÂꟋ{K`‘ÑÍÍ'à´»/Û,KW;Þ4²þð ï Nm|~fGÏ(…³Ã)«1ö­Õ ¥‡¨©ƒÃ™ü-s=à=U66Ï«Ýc蓦W¹íž®›nÔ%êÇìŒ<#Ü×84ån®Ð ÒåOC` ñânÑs‡¢ç 1õ%Îhì½Ã½® e:ݼUZo™`  ÅZŸŒÊ«ê1ÏÄo$q¹Þ€©ˆhÐÉä¯ñ[!…Ú˜àJ:x2$Íß&PåT£6ç— ‡Í*4Ýšçjÿ ‰É nófÐ ó(L5C•åÆ\rMÒ@ò }y-W}™üýVù—ú¢=Ù”c®‘< M ž ´Phr ¦©TD ‘ù.$´÷O‡‘V2Æò.=IUŒ=ž‡â¬i™aþÓåÙ?òUø'ØÖ•.~* šTŒ!•-×áºTâ®ä#õü'´ eýlYÅÓeÕKÂrT"CÚ@u!Óxƒ{š3€}1¿(r}%«nËamjÑ%ÑNEò v ˜à  σöK³,*º.àzù¨™Ó ÚçâU¦*¿ 9{%Ö¹ njûdaXöb) kÛƱûÓ\°M7ˆÂ=û›ç¿Ã‚­V»Cg–8ÙêE- j)k$º`Ã-ùEýeBÆÇ]c¡°ñty&Òd0nõ'¡W+ƒ*|–øµFa\GQªEAÔp5\Ǽ·¼Ç8·õ -â§Ú[ ‡ uZeÖ 3}×d'+¹:ð+K†Û®s!Ï$úe€<Û”x)1»a­¡LC]¸µík…ÚàA»AYº{†ªS[¦5HÒ7ù --,ísòDØ€èk ÞÀîÜ ò@â( ËNˆë›4ô½•/¦o‡€Û7 ê•ÆêòðÜy'Án½µ á˜ݦ ndeo…[ì¶Ê,¥R³Ä=À±—–ß;£™´ñSâ*g§”ïaið‘Jå~™ÓÞ ß³Õ¢»8x埒²52>AÊb&-÷\7´éÄù€T˜,w;3{ï˜k…à¹ÄqÀ«œ{€\ ˆ¾[´¨јr &Úé„Ívˆ±8†¿]|¬ņ4I×pÞS1ÈÖz‰#Ìv‡G!YNògñ:màTz¢Ý1ô©^O=~ë|5Bã™ç•¼µõ•bÆ@úÕS¬ÈŒ#¬zünrŸ û” Z²•ï›èðV"ÁHÚý©wÝ €7¼Ìu1hÑa3Éä û f$o¿É ™Ú›ÝçnpÒ3äÌ3†Í§,Äï]$‰/pê †«À¼¸e9­Æê_C]žƒ·ý·frÁN«, E=›Çq -‰öŒ:aÏ¿±í&£Í:-} 84‘ÿ eƒQÑeëSsuiA ³g㟥ú£?ÿ ʼn*”“÷aühe:ÊWa@ÒÞk±eØ] F Ô—r.åä˜ @ö¥ªZoÐýYL·¥S²G/‡ñ <~*ZÆ´è>JlòàÛƽÿ 窘ìGN¢:I®KšJp/`íIÁÀõ#Ä-€ö­šµŒoF4|ÆQØÆ@Ì|£Ô…¢À{9˜è½Üó›€ôYÒÎYsið;ís¤€à²ˆ‚4qÉVŒI$ ‰"° æµ8cXGjœˏ¡Aâý•ËÜ¢ûï e·çLx']á"oÅÎê3¯Ç—¹”ó0nå‚âg{Œñ> S´˜îè°g238‚ãköÝfÚd´6Ò€;ò÷±¢™¼›º ¢Æ'¥Ðx'e¬ç ]bÈÆV¢ó‹kýBO ðÊâ$Ÿ!×T 3Mýמ žìٍàÌü‘8÷€àæØ8æ©6‰©L´«…oãpð„~Çk‰!ñ;‹”ÛžÍ àž±z Ÿôû øŸÝužÏ;ÿ #|u6™Þ¬ÚˆÐõA4¶â|ôl|Ê2ŽÇ¤ÝÅÇY.<#Aí.k§hóF‚”Y; M½Ö4hŸ4&›­¿tès´%FìL¥£Ãk‰ÇT¤haÁ¤ÚxfÉ`ÑìË›>i 3t‚:,–+^÷´–{Û–Nxi"x‘Ûg î¨>¥Õ܁ùZH,2Û“:8xÊ¢Çí9.É-Ìâã-=çjwµS˜dütžçwýGòú®®ûº_ˆýx$–¡ãøO EÚÛÏ÷R„×w+3£Á£öUMyR²¹âŒ°š›¸Ñãò9§Ó_Dl+Ùßc›úšGÅÌc†Ž!Ko=¶.‘Îÿ c²(2®V mª.ÿ ¹B›¹å ù„öŸSV>™ü¯$y:G¢Z×àøúdî¹û­·ýÇ´:•c LÍõi_‹ö+ÎæGÊè>OŠ•äž´§Þ{X}¨1ÚTc›»Qþ•êô°t¿OP?eæ~É{5]•ÙR£r5†nZ\ã@ &îJõ ¾àC°þV>fé¥/ü5ñÊIº_é5 ;e­h<@ Ä&æÃëE%;X,ÒãÆÞ`Oò¦kŸm#˜!ÀyÄ¢| óLšò¥Ä` ¶R=|ÈCâh5ò3DˆïF†ðÒ#ÅìÛœ?¸yhBãœí ZxßÎÄhºRK„`Þödvײ™ÀÈÑÒgŒuY w³%†ƒÓzõ ÖÏp‚dH®¦A´ù§»ÓÇMæ~)ˆð‡û:ù&Ä •vGD´À n ݇¼Ö8Fö óáà£~Ë¥x`oK|Ä?fxiØü%pìR>éò+Û±éÎ>núlFŤ'tq8LZÏvÃ?„¡ß±È⽆¯³íü@x|PöUäèØã¡ð‚ŒAìÏ"vÍwóŸÍ{ ý0.z È•Ö{,N¡£¡ŸKÕÙž>Ýœþ ÍÀ°<×EA!Å‚D™IúOÍ¡>ôG}Â` ÍßkÜL™Ž Þð™ {IøF²¹òQ3&!ÃÂÞz.d&Ï-sH¸,Ôõ˜ŽP€ 77ˆÝ¼ÊëÜw =cÕ Ú,ØÐ5ÎYÐ)ì´öœgŒ[¤ßv㙑8心>h]§µháYš£²ºÑ.{Ï7Sð•?´~×SÃKýJÛ˜ ™Íäiúu<µX¶1õ^kâçIÑ£sZ4h>j*ÔšD:4­¿_ ÷¸ Õxæÿ ¸?Mù _•­ÊÐ ä ÷ý ÑwL œ­ïnTkÛUÍN©ë:¦fV ¶ÜÔÜMªÅâA½–¿R×TXš-%iTÊT•‡Ù‚JôϐZxWÑè‰f‰òG º ×Õû2aZ7OU3[“×AT–ÞŒ…-‘¤”Ì ì&(ˆ¿­•ƒkï’:ðY¦W‘ Å)“†‘˜³Åtcø˜ñTÂwÚÇ4|üLÇªí–v- qˆèU qPE.†â‘˜µ Æ,ÐÅs]8¾„oúÑ i>ÜxxÈó)ƒ ´æÁâØ$À‰vžŸf$Ž |ãw;ÀÁIJ»b` {¦Ó¤Ú$©YÀ‘n@Óïž«9J¼êG m¤ ܯ¹ÌW4€ÐÒÅÛ‡#褕Ÿn-?í|с¥÷Ú¹¬'´ÞÜ9ÓK `hê£SÄSà?7—Wí_´…óB›»:=Ãïq`<8ñÓŒÑlú2d¬ê³£hÖ[l|$vÝro~'R®‰§°ñmY ͧäP |PUª¹·:3Œ[Û{Xÿ ºâ@‚W–Äé u‚ ¯´*=íή.pûÒdt @G‰¬ s¸ ëÉücr ÞæѨÊ@>¤¢Ö±. Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ--- -- Pack and unpack binary data. -- -- THIS LIBRARY IS DEPRECATED! Please use builtin Lua 5.3 string.pack facilities. -- -- A problem script authors often face is the necessity of encoding values -- into binary data. For example after analyzing a protocol the starting -- point to write a script could be a hex dump, which serves as a preamble -- to every sent packet. Prior to Lua 5.3, NSE included a bin library, based on lpack -- (http://www.tecgraf.puc-rio.br/~lhf/ftp/lua/) by Luiz Henrique de Figueiredo. -- This library is now reimplemented using Lua 5.3 string.pack facilities. New scripts and libraries -- should adopt Lua 5.3's native string.pack. -- -- The Binlib functions take a format string to encode and decode binary -- data. Packing and unpacking are controlled by the following operator -- characters: -- * H hex string -- * x null byte -- * z zero-terminated string -- * p string preceded by 1-byte integer length -- * P string preceded by 2-byte integer length -- * a string preceded by 4-byte integer length -- * A string -- * f float -- * d double -- * n Lua number -- * c char (1-byte integer) -- * C byte = unsigned char (1-byte unsigned integer) -- * s short (2-byte integer) -- * S unsigned short (2-byte unsigned integer) -- * i int (4-byte integer) -- * I unsigned int (4-byte unsigned integer) -- * l long (8-byte integer) -- * L unsigned long (8-byte unsigned integer) -- * < little endian modifier -- * > big endian modifier -- * = native endian modifier -- -- Note that the endian operators work as modifiers to all the -- characters following them in the format string. -- -- @class module -- @name bin local debug4 = require "stdnse".debug4 local debug5 = require "stdnse".debug5 local verbose = require "stdnse".verbose verbose(0, "DEPRECATION WARNING: bin.lua is deprecated. Please use Lua 5.3 string.pack") local assert = assert local error = error local ipairs = ipairs local pcall = pcall local tonumber = tonumber local tostring = tostring local type = type local tointeger = require "math".tointeger local char = require "string".char local insert = require "table".insert local pack = require "table".pack local unpack = require "table".unpack local tobinary = require "stdnse".tobinary local _ENV = {} local function clamp (args, i, j, mask) for i = i, j do local o = assert(tointeger(args[i])) local n = o & mask if o ~= n then debug4("bin.pack: clamping arg[%d]: 0x%x -> 0x%x", i, o, n) end args[i] = n end end local function _fromhex (s) return char(tonumber(s, 16)) end --- Returns a binary packed string. -- -- The format string describes how the parameters (p1, -- ...) will be interpreted. Numerical values following operators -- stand for operator repetitions and need an according amount of parameters. -- Operators expect appropriate parameter types. -- -- Note: on Windows packing of 64-bit values > 2^63 currently -- results in packing exactly 2^63. -- @param format Format string, used to pack following arguments. -- @param ... The values to pack. -- @return String containing packed data. function _ENV.pack (format, ...) debug5("bin.pack: format = '%s'", format); format = "!1="..format -- 1 byte alignment local endianness = "=" local i, args = 1, pack(...) local function translate (o, n) if o == "=" or o == "<" or o == ">" then endianness = o return o end n = #n == 0 and 1 or tointeger(n) if o == "H" then -- hex string -- N.B. n is the repetition assert(n > 0, "n cannot be 0") -- original bin library allowed this, it doesn't make sense local new = "=" -- !! in original bin library, hex strings are always native for j = i, i+n-1 do args[j] = tostring(args[j]):gsub("%s*(%S%S?)%s*", _fromhex) new = new .. ("c%d"):format(#args[j]) end new = new .. endianness -- restore old endianness i = i + n return new elseif o == "B" then -- bit string -- N.B. n is the repetition error "pack option \"B\" is no longer supported" elseif o == "p" then i = i + n return ("s1"):rep(n) elseif o == "P" then i = i + n return ("s2"):rep(n) elseif o == "a" then i = i + n return ("s4"):rep(n) elseif o == "A" then -- an unterminated string -- N.B. n is the repetition assert(n > 0, "n cannot be 0") -- original bin library allowed this, it doesn't make sense local new = "" for j = i, i+n-1 do new = new .. ("c%d"):format(#args[j]) end i = i + n return new elseif o == "c" then clamp(args, i, i+n-1, 0xff) i = i + n return ("b"):rep(n) elseif o == "C" then clamp(args, i, i+n-1, 0xff) i = i + n return ("B"):rep(n) elseif o == "s" then clamp(args, i, i+n-1, 0xffff) i = i + n return ("i2"):rep(n) elseif o == "S" then clamp(args, i, i+n-1, 0xffff) i = i + n return ("I2"):rep(n) elseif o == "i" then clamp(args, i, i+n-1, 0xffffffff) i = i + n return ("i4"):rep(n) elseif o == "I" then clamp(args, i, i+n-1, 0xffffffff) i = i + n return ("I4"):rep(n) elseif o == "l" then clamp(args, i, i+n-1, 0xffffffffffffffff) i = i + n return ("i8"):rep(n) elseif o == "L" then clamp(args, i, i+n-1, 0xffffffffffffffff) i = i + n return ("I8"):rep(n) else -- 1-to-1 with Lua 5.3 string.pack if o ~= "x" then i = i + n end return o:rep(n) end end format = format:gsub("([%a=<>])(%d*)", translate) debug5("bin.pack: string.pack(format = '%s', ...)", format) return format.pack(format, unpack(args)) -- don't use method syntax for better error message end do -- !! endianness is always big endian for H !! assert(_ENV.pack(">H", "415D615A") == "\x41\x5D\x61\x5A") assert(_ENV.pack("xSSISA", 0x0, 0x0, 0x0, 0x0, "1")) assert(_ENV.pack("x2") == "\x00\x00") assert(_ENV.pack(">IzzzzH", 1, "user", "joe", "database", "db", 0) == "\0\0\0\1user\0joe\0database\0db\0\0") assert(_ENV.pack("cccc", 1, 2, 3, 4) == "\x01\x02\x03\x04") assert(_ENV.pack("c2c2", 1, 2, 3, 4) == "\x01\x02\x03\x04") assert(_ENV.pack("c3c1", 1, 2, 3, 4) == "\x01\x02\x03\x04") assert(_ENV.pack("c1c3", 1, 2, 3, 4) == "\x01\x02\x03\x04") assert(_ENV.pack("xc3", 2, 3, 4) == "\x00\x02\x03\x04") assert(_ENV.pack("c2x2", 2, 3, 4) == "\x02\x03\x00\x00") assert(_ENV.pack("init value for subsequent -- calls. The following return values are the values according to the format -- string. Numerical values in the format string are interpreted as repetitions -- like in pack, except if used with A, -- B, or H, in which cases the number tells -- unpack how many bytes to read. unpack stops if -- either the format string or the binary data string are exhausted. -- @param format Format string, used to unpack values out of data string. -- @param data String containing packed data. -- @param init Optional starting position within the string. -- @return Position in the data string where unpacking stopped. -- @return All unpacked values. function _ENV.unpack (format, data, init) debug5("bin.unpack: format = '%s'", format); format = "!1="..format -- 1 byte alignment if type(init) == "number" and init <= 0 then init = 1 end local endianness = "=" local fixer = {} local i = 0 local function translate (o, n) n = #n == 0 and 1 or tointeger(n) if o == "=" then endianness = "=" return elseif o == "<" then endianness = "<" return elseif o == ">" then endianness = ">" return end i = i + 1 if o == "H" then -- hex string -- N.B. n is the number of bytes to read insert(fixer, {what = "H", which = i}) return ("=c%d%s"):format(n, endianness) -- !! in original bin library, hex strings are always native endian... elseif o == "B" then -- bit string -- N.B. n is the number of bytes to read insert(fixer, {what = "B", which = i}) return ("=c%d%s"):format(n, endianness) -- !! in original bin library, hex strings are always native endian... elseif o == "p" then return ("s1"):rep(n) elseif o == "P" then return ("s2"):rep(n) elseif o == "a" then return ("s4"):rep(n) elseif o == "A" then -- an unterminated string -- N.B. n is the number of bytes to read return ("c%d"):format(n) elseif o == "c" then return ("b"):rep(n) elseif o == "C" then return ("B"):rep(n) elseif o == "s" then return ("i2"):rep(n) elseif o == "S" then return ("I2"):rep(n) elseif o == "i" then return ("i4"):rep(n) elseif o == "I" then return ("I4"):rep(n) elseif o == "l" then return ("i8"):rep(n) elseif o == "L" then return ("I8"):rep(n) else return o:rep(n) end end format = format:gsub("([%a=<>])(%d*)", translate) debug5("bin.unpack: string.unpack(format = '%s', ...)", format) return unpacker(fixer, pcall(format.unpack, format, data, init)) end do local i, v -- !! endianness is always native endian for H !! i, v = _ENV.unpack("H", "\x00\xff\x0f\xf0") assert(i == 2 and v == "00") i, v = _ENV.unpack("H0", "\x00\xff\x0f\xf0") assert(i == 1 and v == "") i, v = _ENV.unpack("H1", "\x00\xff\x0f\xf0") assert(i == 2 and v == "00") i, v = _ENV.unpack("H2", "\x00\xff\x0f\xf0") assert(i == 3 and v == "00FF") i, v = _ENV.unpack("H4", "\x00\xff\x0f\xf0") assert(i == 5 and v == "00FF0FF0") -- !! endianness is always native endian for B !! i, v = _ENV.unpack("B", "\x00\xff\x0f\xf0") assert(i == 2 and v == "00000000") i, v = _ENV.unpack("B0", "\x00\xff\x0f\xf0") assert(i == 1 and v == "") i, v = _ENV.unpack("B1", "\x00\xff\x0f\xf0") assert(i == 2 and v == "00000000") i, v = _ENV.unpack("B2", "\x00\xff\x0f\xf0") assert(i == 3 and v == "0000000011111111") i, v = _ENV.unpack("B4", "\x00\xff\x0f\xf0") assert(i == 5 and v == "00000000111111110000111111110000") i, v = _ENV.unpack("A", "foo"); assert(i == 2 and v == "f") i, v = _ENV.unpack("A0", "foo"); assert(i == 1 and v == "") i, v = _ENV.unpack("A1", "foo"); assert(i == 2 and v == "f") i, v = _ENV.unpack("A2", "foo"); assert(i == 3 and v == "fo") i, v = _ENV.unpack("A3", "foo"); assert(i == 4 and v == "foo") i, v = _ENV.unpack("A4", "foo"); assert(i == 1 and v == nil) end return _ENV