P2P技術を用いたチャットの研究

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1 P2P

2 Server Client Hybrid P2P Pure P2P Pure P2P Single Point of Failure Pure P2P Sever Client Hybrid P2P Pure P2P (Single Point of Failure ) Client Server Hybrid P2P Single Point of Failure PureP2P Hybrid P2P

3

4

5 LimeChat(IRC) Yahoo Yahoo Yahoo Yahoo MSN MSN MSN Gnutella Gnutella ping pong Gnutella query queryhit Gnutella push Main Window Info Window Main Window IM Window

6 PC DSL(Digital Subscriber Line) E MAIL [1] ( 1)[2] Client Server www Hybrid P2P P2P

7 1 6 NAPSTER MSN IM Pure P2P P2P Gnutella[3] WINNY[4] FREENET[5] IRC Internet Relay Chat [6] IRC talk phone UNIX UNIX, Windows, Macintosh ( ) IRC IRC

8 1 7 1 IRC 1 1 Yahoo [7] MSN [8] Hybrid P2P IM Yahoo OS Windows Macintosh (OS 8.6 ) Java i ( ) EZweb ( ) WEB Yahoo Yahoo MSN OS Windows Hotmail Hotmail WEB Peer to peer P2P P2P

9 Single Point of Failure Client Server Hybrid P2P Single Point of Failure Pure P2P Single Point of Failure + (Servents) Pure P2P Gnutella winny Freenet Pure P2P 1 Pure P2P 1.2 Server Client Hybrid P2P Pure P2P Pure P2P Single Point of Failure Pure P2P Pure P2P

10 Pure P2P 6

11 GUI(Graphical User Interface) LimeChat(IRC Client )[9] Client Server Lime Chat #( ) ( ) 2 LimeChat(IRC)

12 2 11 Yahoo Hybrid P2P YAHOO WEB [7] ( 3) ID ( 3) ( )( 3) ( 4) ( 4) ( 4) ( 5)( 6) 3 Yahoo

13 Yahoo 5 Yahoo 6 Yahoo

14 2 13 MSN Hybrid P2P MSN WEB [8] ( )( 7) ( 8) ( 8) ( 8) ( 9) 7 MSN

15 MSN 9 MSN

16 Pure P2P Gnutella winny Freenet Pure P2P Gnutella Gnutella [2] Pure P2P Descriptor TCP/IP Ping,Query ( ) QueryHit HTTP ( 10) 10 Gnutella

17 Descriptor Descriptor Gnutella Descriptor ping pong Descriptor ping ping ping broadcast pong sendback pong ping Gnutella 11 Gnutella ping pong ping pong sendback ping ( 11)

18 2 17 query queryhit Descriptor query queryhit sendback 12 Gnutella query queryhit broadcast query query Hit query broadcast query Hit query queryhit ( 12)

19 2 18 push HTTP GET Push push queryhit Firewall push sendback ( 13) 13 Gnutella push query sendback queryhit queryhit push sendback push File

20 Single Point of Failure Yahoo CHAT MSN Pure P2P Pure P2P IM Pure P2P Pure P2P Server Client Hybrid P2P Pure P2P (IP) Pure P2P (GUI )

21 Pure P2P Server Client IM Hybrid P2P IM 1 1, IP, 1 1, JAVA Server 200 Client 160 Single Point of Failure 1 1

22

23 Hybrid P2P IM 1 1 1, ID IP port, ID port (ID IP port) P2P JAVA Server 250 Client 700 Single Point of Failure

24 Main Window 17 Main Window( 16) ID IM Window ID Main Window IM Window( 17)

25 Pure P2P Pure P2P ID ( ) ID ( ) ID ( ) Hybrid P2P

26

27 myid (myport) ( 18) ID ID ( ) ID mydate.txt 2 OK 18 Info Window

28 (nodelist.txt) IP port connect,(myid),(myport),( IP) (connectport),(myip) ( ) (ConnectionRefused) NG 2 nodelist.txt

29 4 28 (nodeid),(ip),(port) (nodeid),(ip),(port) (nodeid),(ip),(port), + nodelist.txt nodelist.txt 4.3 (connectport),(myip) ( IP) (connectport) getlist,(myid),(myip),(myport) getlist

30 4 29 addmember,( ID),( IP),( port) addmember addmember,( ID),( IP),( port) getlist 1. A 2. A B A 3. B A B B 1 ( 19)

31 4 30 B C A D A D 2. B C (addmember) 3. B addmembera C C D 4. B addmembera C 5. D addmembera D

32 onlinfriend offlinefriend online ( 20) onlin friend offline friend online ID offline friend ID MainWindow myfriend.txt Main Window sound on off 4.5 Main Window onlinefriendid onlineid IMwindow( 21)

33 Main Window 21 IM Window

34 4 33 IMwindow TextArea TextField TextField Enter TextArea (myid) (TextField ) IMwindow TextArea ( ID) ( TextField ) Main Window IM Window IMwindow Main Window onlinefriend online ID 4.6 deletemember,( ID) ID 4.1 nodelist.txt (myfriend.txt)

35 Pure P2P 5.1 NAT NAT 5.2 (A ) IP,port A 5.3 ID passward ID ID ID ID ID@( ) Single Point of Failure 1 Single Point of Failure

36 5 35 TextArea URL IM Window IM Window

37 Client Server Hybrid P2P Single Point of Failure PureP2P ID Hybrid P2P Pure P2P Pure P2P 10 Hybrid P2P, Info Window password * ID

38 6 37 JAVA JAVA IP Pure P2P NAT Pure P2P 10

39 6 38

40 39 [1] Mark Handel and James D.Herbsleb: What Is Chat Doing in the Workplace?, In CSCW 02,pp.1-10, New Orleans, Louisiana, USA November 16-20, [2] :, for student/10/na-10- done.pdf [3] The Gnutella Protocol Specification v0.4, protocolv4.shtml [4] Winny Tips, [5] Freenet: A Distributed Anonymous Information Storage and Retrieval System, [6] IRC users in Japan Home Page, [7] Yahoo, [8] MSN, [9] Lime Chat, mb-arts/

41 40 connect,(myid),(myport),( IP) IP IP (connectport),(myip) connect sendback NG connect sendback getlist,(myid),(myip),(myport) addmember,(addid),(addip),(addport) (addid) deletemember,(deleteid) (deleteid) msg,(windowname),( ) IM Window ( ) changeim,(windowname),(addid) IM Window (addid)

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