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0000 0a 4e 57 47 2f 52 46 43 23 20 37 33 36 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 .NWG/RFC#.736...................
0020 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 4d 52 43 20 33 31 2d 4f 43 54 2d 37 37 20 32 33 3a ...............MRC.31-OCT-77.23:
0040 32 38 20 20 34 32 32 31 33 0a 54 65 6c 6e 65 74 20 53 55 50 44 55 50 20 4f 70 74 69 6f 6e 0a 0a 28..42213.Telnet.SUPDUP.Option..
0060 0a 0a 4e 65 74 77 6f 72 6b 20 57 6f 72 6b 69 6e 67 20 47 72 6f 75 70 20 20 20 20 20 20 20 20 20 ..Network.Working.Group.........
0080 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 4d 61 ..............................Ma
00a0 72 6b 20 43 72 69 73 70 69 6e 0a 52 65 71 75 65 73 74 20 66 6f 72 20 43 6f 6d 6d 65 6e 74 73 20 rk.Crispin.Request.for.Comments.
00c0 37 33 36 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 736.............................
00e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 53 55 2d 41 49 0a 4e 49 43 20 34 32 32 31 33 20 20 20 ..............SU-AI.NIC.42213...
0100 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 ................................
0120 20 20 20 20 20 20 20 20 20 20 20 20 20 33 31 20 4f 63 74 6f 62 65 72 20 31 39 37 37 0a 0a 20 20 .............31.October.1977....
0140 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 54 45 4c 4e 45 54 20 53 ........................TELNET.S
0160 55 50 44 55 50 20 4f 70 74 69 6f 6e 0a 0a 31 2e 20 20 43 6f 6d 6d 61 6e 64 20 6e 61 6d 65 20 61 UPDUP.Option..1...Command.name.a
0180 6e 64 20 63 6f 64 65 2e 0a 0a 20 20 20 53 55 50 44 55 50 20 20 20 20 20 20 20 20 20 20 20 20 20 nd.code......SUPDUP.............
01a0 20 20 32 31 0a 0a 32 2e 20 20 43 6f 6d 6d 61 6e 64 20 6d 65 61 6e 69 6e 67 73 2e 0a 0a 20 20 20 ..21..2...Command.meanings......
01c0 49 41 43 20 57 49 4c 4c 20 53 55 50 44 55 50 0a 0a 20 20 20 20 20 20 54 68 65 20 73 65 6e 64 65 IAC.WILL.SUPDUP........The.sende
01e0 72 20 6f 66 20 74 68 69 73 20 63 6f 6d 6d 61 6e 64 20 20 52 45 51 55 45 53 54 53 20 70 65 72 6d r.of.this.command..REQUESTS.perm
0200 69 73 73 69 6f 6e 20 74 6f 2c 20 6f 72 20 20 63 6f 6e 66 69 72 6d 73 0a 20 20 20 20 20 20 74 68 ission.to,.or..confirms.......th
0220 61 74 20 69 74 20 77 69 6c 6c 2c 20 75 73 65 20 74 68 65 20 53 55 50 44 55 50 20 64 69 73 70 6c at.it.will,.use.the.SUPDUP.displ
0240 61 79 20 70 72 6f 74 6f 63 6f 6c 0a 0a 20 20 20 49 41 43 20 57 4f 4e 27 54 20 53 55 50 44 55 50 ay.protocol.....IAC.WON'T.SUPDUP
0260 0a 0a 20 20 20 20 20 20 54 68 65 20 73 65 6e 64 65 72 20 6f 66 20 74 68 69 73 20 63 6f 6d 6d 61 ........The.sender.of.this.comma
0280 6e 64 20 52 45 46 55 53 45 53 20 74 6f 20 75 73 65 20 74 68 65 20 53 55 50 44 55 50 20 70 72 6f nd.REFUSES.to.use.the.SUPDUP.pro
02a0 74 6f 63 6f 6c 2e 0a 0a 20 20 20 49 41 43 20 44 4f 20 53 55 50 44 55 50 0a 0a 20 20 20 20 20 20 tocol......IAC.DO.SUPDUP........
02c0 54 68 65 20 73 65 6e 64 65 72 20 6f 66 20 74 68 69 73 20 20 63 6f 6d 6d 61 6e 64 20 52 45 51 55 The.sender.of.this..command.REQU
02e0 45 53 54 53 20 74 68 61 74 20 20 74 68 65 20 72 65 63 65 69 76 65 72 20 75 73 65 2c 20 20 6f 72 ESTS.that..the.receiver.use,..or
0300 0a 20 20 20 20 20 20 67 72 61 6e 74 73 20 74 68 65 20 72 65 63 65 69 76 65 72 20 70 65 72 6d 69 .......grants.the.receiver.permi
0320 73 73 69 6f 6e 20 74 6f 20 75 73 65 2c 20 74 68 65 20 53 55 50 44 55 50 20 70 72 6f 74 6f 63 6f ssion.to.use,.the.SUPDUP.protoco
0340 6c 2e 0a 0a 20 20 20 49 41 43 20 44 4f 4e 27 54 0a 0a 20 20 20 20 20 20 54 68 65 20 73 65 6e 64 l......IAC.DON'T........The.send
0360 65 72 20 6f 66 20 74 68 69 73 20 63 6f 6d 6d 61 6e 64 20 44 45 4d 41 4e 44 53 20 74 68 61 74 20 er.of.this.command.DEMANDS.that.
0380 74 68 65 20 72 65 63 65 69 76 65 72 20 6e 6f 74 20 75 73 65 20 74 68 65 0a 20 20 20 20 20 20 53 the.receiver.not.use.the.......S
03a0 55 50 44 55 50 20 70 72 6f 74 6f 63 6f 6c 2e 0a 0a 33 2e 20 20 44 65 66 61 75 6c 74 2e 0a 0a 20 UPDUP.protocol...3...Default....
03c0 20 20 57 4f 4e 27 54 20 53 55 50 44 55 50 0a 0a 20 20 20 44 4f 4e 27 54 20 53 55 50 44 55 50 0a ..WON'T.SUPDUP.....DON'T.SUPDUP.
03e0 0a 20 20 20 69 2e 65 2e 2c 20 74 68 65 20 53 55 50 44 55 50 20 64 69 73 70 6c 61 79 20 70 72 6f ....i.e.,.the.SUPDUP.display.pro
0400 74 6f 63 6f 6c 20 69 73 20 6e 6f 74 20 69 6e 20 75 73 65 2e 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a tocol.is.not.in.use.............
0420 0a 0a 0a 4d 61 72 6b 20 43 72 69 73 70 69 6e 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 ...Mark.Crispin.................
0440 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 ................................
0460 20 20 20 20 20 20 5b 70 61 67 65 20 31 5d 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ......[page.1]..................
0480 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................................
04a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................................
04c0 00 00 00 00 00 0c 0a 0a 4e 57 47 2f 52 46 43 23 20 37 33 36 20 20 20 20 20 20 20 20 20 20 20 20 ........NWG/RFC#.736............
04e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 4d 52 43 20 33 31 2d 4f 43 54 ......................MRC.31-OCT
0500 2d 37 37 20 32 33 3a 32 38 20 20 34 32 32 31 33 0a 54 65 6c 6e 65 74 20 53 55 50 44 55 50 20 4f -77.23:28..42213.Telnet.SUPDUP.O
0520 70 74 69 6f 6e 0a 0a 0a 34 2e 20 20 4d 6f 74 69 76 61 74 69 6f 6e 20 66 6f 72 20 74 68 65 20 6f ption...4...Motivation.for.the.o
0540 70 74 69 6f 6e 2e 0a 0a 20 20 20 53 69 6e 63 65 20 74 68 65 20 70 75 62 6c 69 63 61 74 69 6f 6e ption......Since.the.publication
0560 20 6f 66 20 52 46 43 20 37 33 34 2c 20 20 49 20 68 61 76 65 20 62 65 65 6e 20 72 65 71 75 65 73 .of.RFC.734,..I.have.been.reques
0580 74 65 64 20 74 6f 20 20 64 65 73 69 67 6e 0a 20 20 20 61 6e 20 6f 70 74 69 6f 6e 20 74 6f 20 20 ted.to..design....an.option.to..
05a0 74 68 65 20 54 45 4c 4e 45 54 20 20 70 72 6f 74 6f 63 6f 6c 20 74 6f 20 70 72 6f 76 69 64 65 20 the.TELNET..protocol.to.provide.
05c0 20 66 6f 72 20 53 55 50 44 55 50 20 20 73 65 72 76 69 63 65 2e 0a 20 20 20 54 68 69 73 20 6f 70 .for.SUPDUP..service.....This.op
05e0 74 69 6f 6e 20 61 6c 6c 6f 77 73 20 61 20 68 6f 73 74 20 74 6f 20 20 70 72 6f 76 69 64 65 20 53 tion.allows.a.host.to..provide.S
0600 55 50 44 55 50 20 73 65 72 76 69 63 65 20 6f 6e 20 74 68 65 20 20 6e 6f 72 6d 61 6c 0a 20 20 20 UPDUP.service.on.the..normal....
0620 54 45 4c 4e 45 54 20 73 6f 63 6b 65 74 20 28 32 37 20 6f 63 74 61 6c 29 20 69 6e 73 74 65 61 64 TELNET.socket.(27.octal).instead
0640 20 6f 66 20 31 33 37 20 28 6f 63 74 61 6c 29 20 77 68 69 63 68 20 69 73 20 74 68 65 20 6e 6f 72 .of.137.(octal).which.is.the.nor
0660 6d 61 6c 0a 20 20 20 53 55 50 44 55 50 20 49 43 50 20 73 6f 63 6b 65 74 2e 0a 0a 35 2e 20 20 44 mal....SUPDUP.ICP.socket...5...D
0680 65 73 63 72 69 70 74 69 6f 6e 20 6f 66 20 74 68 65 20 6f 70 74 69 6f 6e 2e 0a 0a 20 20 20 41 20 escription.of.the.option......A.
06a0 75 73 65 72 20 20 54 45 4c 4e 45 54 20 20 70 72 6f 67 72 61 6d 20 77 68 69 63 68 20 20 77 69 73 user..TELNET..program.which..wis
06c0 68 65 73 20 20 74 6f 20 75 73 65 20 20 74 68 65 20 20 53 55 50 44 55 50 20 20 64 69 73 70 6c 61 hes..to.use..the..SUPDUP..displa
06e0 79 0a 20 20 20 70 72 6f 74 6f 63 6f 6c 20 69 6e 73 74 65 61 64 20 6f 66 20 74 68 65 20 4e 56 54 y....protocol.instead.of.the.NVT
0700 20 74 65 72 6d 69 6e 61 6c 20 73 65 72 76 69 63 65 20 73 68 6f 75 6c 64 20 73 65 6e 64 20 61 6e .terminal.service.should.send.an
0720 20 49 41 43 20 20 44 4f 0a 20 20 20 53 55 50 44 55 50 2e 20 20 49 66 20 20 74 68 65 20 20 73 65 .IAC..DO....SUPDUP...If..the..se
0740 72 76 65 72 20 20 69 73 20 20 77 69 6c 6c 69 6e 67 20 74 6f 20 20 75 73 65 20 20 74 68 65 20 20 rver..is..willing.to..use..the..
0760 53 55 50 44 55 50 20 20 64 69 73 70 6c 61 79 0a 20 20 20 70 72 6f 74 6f 63 6f 6c 2c 20 69 74 20 SUPDUP..display....protocol,.it.
0780 20 73 68 6f 75 6c 64 20 72 65 73 70 6f 6e 64 20 20 77 69 74 68 20 49 41 43 20 20 57 49 4c 4c 20 .should.respond..with.IAC..WILL.
07a0 53 55 50 44 55 50 3b 20 20 6f 74 68 65 72 77 69 73 65 20 20 69 74 0a 20 20 20 73 68 6f 75 6c 64 SUPDUP;..otherwise..it....should
07c0 20 72 65 66 75 73 65 20 77 69 74 68 20 49 41 43 20 57 4f 4e 54 20 53 55 50 44 55 50 2e 0a 0a 20 .refuse.with.IAC.WONT.SUPDUP....
07e0 20 20 46 6f 72 20 68 6f 73 74 73 20 20 77 68 69 63 68 20 6e 6f 72 6d 61 6c 6c 79 20 20 70 72 6f ..For.hosts..which.normally..pro
0800 76 69 64 65 20 20 53 55 50 44 55 50 20 74 65 72 6d 69 6e 61 6c 20 20 73 65 72 76 69 63 65 73 2c vide..SUPDUP.terminal..services,
0820 20 20 74 68 65 0a 20 20 20 73 65 72 76 65 72 20 63 61 6e 20 73 65 6e 64 20 49 41 43 20 20 57 49 ..the....server.can.send.IAC..WI
0840 4c 4c 20 53 55 50 44 55 50 20 75 70 6f 6e 20 49 43 50 20 20 77 68 69 63 68 20 74 68 65 20 75 73 LL.SUPDUP.upon.ICP..which.the.us
0860 65 72 20 6d 61 79 20 20 74 68 65 6e 0a 20 20 20 61 63 63 65 70 74 20 6f 72 20 72 65 66 75 73 65 er.may..then....accept.or.refuse
0880 2e 0a 0a 20 20 20 49 66 20 74 68 65 20 53 55 50 44 55 50 20 6f 70 74 69 6f 6e 20 69 73 20 20 69 ......If.the.SUPDUP.option.is..i
08a0 6e 20 65 66 66 65 63 74 2c 20 6e 6f 20 66 75 72 74 68 65 72 20 54 45 4c 4e 45 54 20 20 6e 65 67 n.effect,.no.further.TELNET..neg
08c0 6f 74 69 61 74 69 6f 6e 73 0a 20 20 20 61 72 65 20 61 6c 6c 6f 77 65 64 2e 20 20 20 54 68 65 79 otiations....are.allowed....They
08e0 20 20 61 72 65 20 20 6d 65 61 6e 69 6e 67 6c 65 73 73 2c 20 73 69 6e 63 65 20 20 53 55 50 44 55 ..are..meaningless,.since..SUPDU
0900 50 20 20 68 61 73 20 20 69 74 73 20 20 6f 77 6e 0a 20 20 20 66 61 63 69 6c 69 74 69 65 73 20 74 P..has..its..own....facilities.t
0920 6f 20 70 65 72 66 6f 72 6d 20 20 74 68 65 20 66 75 6e 63 74 69 6f 6e 73 20 74 68 61 74 20 61 72 o.perform..the.functions.that.ar
0940 65 20 6e 65 65 64 65 64 2e 20 20 48 65 6e 63 65 2c 20 6f 63 74 61 6c 0a 20 20 20 33 37 37 20 77 e.needed...Hence,.octal....377.w
0960 69 6c 6c 20 62 65 63 6f 6d 65 20 61 6e 20 6f 72 64 69 6e 61 72 79 20 74 72 61 6e 73 6d 69 74 74 ill.become.an.ordinary.transmitt
0980 65 64 20 63 68 61 72 61 63 74 65 72 20 28 69 6e 20 74 68 69 73 20 63 61 73 65 20 20 61 6e 0a 20 ed.character.(in.this.case..an..
09a0 20 20 69 6e 76 61 6c 69 64 20 25 54 44 20 63 6f 64 65 29 20 69 6e 73 74 65 61 64 20 6f 66 20 61 ..invalid.%TD.code).instead.of.a
09c0 6e 20 49 41 43 2e 0a 0a 20 20 20 46 6f 6c 6c 6f 77 69 6e 67 20 74 68 65 20 6d 75 74 75 61 6c 20 n.IAC......Following.the.mutual.
09e0 20 61 63 63 65 70 74 61 6e 63 65 20 6f 66 20 74 68 65 20 20 53 55 50 44 55 50 20 6f 70 74 69 6f .acceptance.of.the..SUPDUP.optio
0a00 6e 2c 20 74 68 65 20 20 53 55 50 44 55 50 0a 20 20 20 6e 65 67 6f 74 69 61 74 69 6f 6e 20 70 72 n,.the..SUPDUP....negotiation.pr
0a20 6f 63 65 65 64 73 20 61 73 20 64 65 73 63 72 69 62 65 64 20 69 6e 20 52 46 43 20 37 33 34 2e 0a oceeds.as.described.in.RFC.734..
0a40 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 4d 61 72 6b 20 43 72 .........................Mark.Cr
0a60 69 73 70 69 6e 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 ispin...........................
0a80 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 5b 70 61 67 ............................[pag
0aa0 65 20 32 5d 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e.2]............................
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0c00 00 00 00 00 00 00 00 00 00 .........