Re^4: Help with LAN

[Christos Ricudis]

Hello Linux-greek-users!

Linux-greek-users wrote to Christos Ricudis about "Re^3: Help with LAN":

 >> moy kapnisei. Den exw to dikaiwma na xrhsimopoihsw THN YLOPOIHSH
 >> TOY PRWTOKOLLOY AYTOY POY ANHKEI STH MICROSOFT. An ftiaksw mia 
 >> dikh moy ylopoihsh TOY IDIOY AKRIBWS PRWTOKOLLOY xwris na 
 >> xrhsimopoihsw eswterikes plhrofories ths
 >> Micro$oft, kaneis de mporei na moy pei apolytws tipota.

 L> Diladi to protokolo (opos perigrafetai, pou kapou tha
 L> perigrafetai) iparxei eleythera diathesimo? 

Oxi, h Microsoft exei kai ta dikaiwmata toy documentation. 

Alla apo th stigmh poy DEN exei PATENT sto prwtokollo alla aplws COPYRIGHT, 
shmainei oti ean kapoios, me opoiadhpote dhmosiws dia8esima mesa, kataferei na
kanei mia ylopoihsh toy idioy prwtokolloy, ayto fysika kai den desmeyetai apo
ta dikaiwmata ths Microsoft. 

Sthn periptwsh twn patents, ta pragmata einai diaforetika. MPOREIS na bgaleis
mia patenta poy na kalyptei perioristika ena prwtokollo, kai na dinei mono se
sena thn dynatothta ekmetalleyshs toy gia ena orismeno xroniko diasthma (nomizw
maximum 75 xronia). Se ayth thn periptwsh, AKOMA kai an parallhla anaptykseis
monos sou to idio prwtokollo, 8ewreitai oti parabiazeis thn patenta. (Ayto
symbainei logou xarh me ton algori8mo sympieshs LZ77, h me thn RSA kryptografia
- an kai h patenta ths teleytaias exei lhksei apo perisy nomizw). Oi patentes
omws dinontai mono ean mporeseis na apodeikseis oti o algori8mos (h to
prwtokollo klp klp) poy 8eleis na prostateyseis, einai dikhs soy epinohshs KAI
den exei hdh epinoh8ei apo kapoion allon. De mporw na fantastw mia perigrafh
toy NetBEUI poy na tairiazei mono s'ayto kai oxi kai se kapoio proyparxon
prwtokollo toy idioy epipedoy....

 L> perigrafetai se kanena "eleythera diakimoumeno" arxeio (i kati
 L> tetoio) alla prepei na to agoraseis, ayto to arxeio, gia na 
 L> matheis ta specs tou protokolou...

De xreiazetai na to kaneis. Ean mporeseis mesw ekswterikhs kai mono parathrhshs
na katalabeis pws leitoyrgei eswterika, eisai kalymmenos. Ayto legetai reverse
engineering : Bazeis dyo ylopoihseis toy SMB (dyo mhxanhmata windows p.x.) na
antallasoyn arxeia, kai parakoloy8eis to ti lene metaksy toys. Ystera
epanalambaneis to "dialogo" kai peiramatizesai allazontas fields, ktl ktl.
Exontas kai gnwseis sxediasmoy analogwn systhmatwn, "manteyeis" th domh kai th
leitourgia tous. Telika, kataferneis na katanohseis pws leitoyrgei eswterika h
ylopoihsh - dhladh poio akribws einai to prwtokollo, se arketo ba8mo wste na
kaneis mia dikh sou ylopoihsh. 

To samba grafthke kai synexizei na grafetai akribws m'ayto ton tropo. O Andrew
Tridgell ekane reverse engineering sto Pathworks ths DEC. To IPX/SPX toy linux
epishs grafthke akribws me ayto ton tropo. 

Anti8etws, oi programmatistes poy eftiaksan to LessTiff, to ekanan exontas hdh
prosbash sto source code toy Motif kai ara mporoyn na kathgorh8oyn gia
antigrafh - pragma poy shmainei oti h OSF/1 mporei aneta na toys trabhksei mia
mynhsh (ypopteyomai wstoso oti de 8a to kanei) 

 L> Ara exomoiosi (tou protokolou kai oxi ton dikaiomaton, opos sosta
 L> episimanes)

Den "ekswmoiwneis" ena prwtokollo. 

To "ylopoieis". Estw kai aneksarthta. 

Aplws mporeis na "ekswmoiwseis" mia sygkekrimenh "ylopoihsh" toy prwtokolloy. 

NAI. KOLLAW STIS LEKSEIS. Giati oi lekseis exoyn nohma - den yparxoyn aplws gia
na trexoyn eytyxismenes sta kataprasina libadia ths Boreias Skwtias...

Ciao,
  Christos
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