One document matched: draft-ietf-dccp-ccid3-thin-01.ps

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/F0 10/Courier-Bold@0 SF(Internet Engineering Task Force)72 85 Q
(Eddie Kohler)174 E 318(INTERNET-DRAFT UCLA)72 98 R 162
(draft-ietf-dccp-ccid3-thin-01.ps 18)72 111 R(July 2004)6 E
(Expires: January 2005)72 124 Q/F1 14/Times-Bold@0 SF(DCCP CCID 3-Thin)
226.946 149 Q/F2 11/Times-Bold@0 SF(Status of this Memo)72 181 Q/F3 11
/Times-Roman@0 SF(This document is an Internet-Draft.)100.8 197.6 Q
(By submitting this Internet-Draft, we certify that an)100.8 214.2 Q
2.75(ya)-.165 G(pplicable patent or other IPR claims)-2.75 E
(of which we are a)100.8 227.2 Q -.11(wa)-.165 G(re ha).11 E .33 -.165
(ve b)-.22 H(een disclosed, or will be disclosed, and an).165 E 2.75(yo)
-.165 G 2.75(fw)-2.75 G(hich we)-2.75 E(become a)100.8 240.2 Q -.11(wa)
-.165 G(re will be disclosed, in accordance with RFC 3668 \(BCP 79\).)
.11 E(By submitting this Internet-Draft, we accept the pro)100.8 256.8 Q
(visions of Section 3 of RFC 3667)-.165 E(\(BCP 78\).)100.8 269.8 Q
(Internet-Drafts are w)100.8 286.4 Q
(orking documents of the Internet Engineering T)-.11 E(ask F)-.88 E
(orce \(IETF\), its)-.165 E(areas, and its w)100.8 299.4 Q
(orking groups.)-.11 E(Note that other groups may also distrib)5.5 E
(ute w)-.22 E(orking)-.11 E(documents as Internet-Drafts.)100.8 312.4 Q
(Internet-Drafts are draft documents v)100.8 329 Q
(alid for a maximum of six months and may be)-.275 E
(updated, replaced, or obsoleted by other documents at an)100.8 342 Q
2.75(yt)-.165 G 2.75(ime. It)-2.75 F(is inappropriate to use)2.75 E
(Internet-Drafts as reference material or to cite them other than a "w)
100.8 355 Q(ork in progress.")-.11 E
(The list of current Internet-Drafts can be accessed at http://www)100.8
371.6 Q(.ietf.or)-.715 E(g/1id-abstracts.html)-.198 E
(The list of Internet-Draft Shado)100.8 388.2 Q 2.75(wD)-.275 G
(irectories can be accessed at)-2.75 E(http://www)100.8 401.2 Q
(.ietf.or)-.715 E(g/shado)-.198 E -.715(w.)-.275 G(html).715 E F2
(Copyright Notice)72 427.2 Q F3(Cop)100.8 443.8 Q
(yright \(C\) The Internet Society \(2004\). All Rights Reserv)-.11 E
(ed.)-.165 E F2(Abstract)72 469.8 Q F3
(This document describes the Thin v)100.8 486.4 Q
(ariant of the Datagram Congestion Control Protocol)-.275 E(\(DCCP\) Co\
ngestion Control Identi\214er 3, TCP-Friendly Rate Control \(TFRC\).)
100.8 499.4 Q(The Thin)5.5 E -.275(va)100.8 512.4 S
(riant is more restricted than CCID 3; it limits allo).275 E -.11(wa)
-.275 G(ble options, acceptable feature).11 E -.275(va)100.8 525.4 S
(lues, and so forth.).275 E(CCID 3-Thin pack)5.5 E(ets are still v)-.11
E(alid DCCP CCID 3 pack)-.275 E(ets.)-.11 E(CCID 3-Thin w)100.8 538.4 Q
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(January 2005)2.75 E(July 2004)123.726 E/F1 13/Times-Bold@0 SF -1.196
(Ta)253.526 85 S(ble of Contents)1.196 E/F2 10/Times-Roman@0 SF
(1. Introduction)100.8 110 Q F0 11(.......................)11.01 G F2(3)
11.5 E(2. Con)100.8 122 Q -.15(ve)-.4 G(ntions).15 E F0 11
(.......................)10.44 G F2(3)11.5 E(3. The CCID 3-Thin Option)
100.8 134 Q F0 11(...................)13.51 G F2(3)11.5 E
(4. CCID 3-Thin Restrictions)100.8 146 Q F0 11(...................)11.56
G F2(3)11.5 E(5. Connection Establishment)100.8 158 Q F0 11
(...................)10.17 G F2(5)11.5 E
(5.1. Thin Client Initiates Connection)115.8 170 Q F0 11
(................)5.03 G F2(5)11.5 E(5.2. Serv)115.8 182 Q
(er Responds to Thin Client)-.15 E F0 11(................)8.24 G F2(5)
11.5 E(5.3. Thin Serv)115.8 194 Q(er Responds to F)-.15 E(at Client)-.15
E F0 11(...............)6.86 G F2(6)11.5 E(5.4. F)115.8 206 Q
(at Client Responds to Thin Serv)-.15 E(er')-.15 E 2.5(sR)-.55 G
(esponse)-2.5 E F0 11(............).61 G F2(6)11.5 E
(6. Security Considerations)100.8 218 Q F0 11(....................)5.87
G F2(6)11.5 E(7. IAN)100.8 230 Q 2.5(AC)-.35 G(onsiderations)-2.5 E F0
11(.....................).81 G F2(7)11.5 E(8. Thanks)100.8 242 Q F0 11
(.........................)3.51 G F2(7)11.5 E(Normati)100.8 254 Q .3
-.15(ve R)-.25 H(eferences).15 E F0 11(.....................)8.66 G F2
(7)11.5 E(Authors' Addresses)100.8 266 Q F0 11(......................)
5.05 G F2(7)11.5 E(Full Cop)100.8 278 Q(yright Statement)-.1 E F0 11
(....................)10.12 G F2(7)11.5 E(Intellectual Property)100.8
290 Q F0 11(......................)2.27 G F2(7)11.5 E F0 -.385(Ko)72 769
S 362.293(hler [P).385 F(age 2])-.165 E 0 Cg EP
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Q/F2 14/Times-Bold@0 SF(Intr)5.5 E(oduction)-.252 E F0(The Datagram Con\
gestion Control Protocol \(DCCP\) [DCCP] implements a congestion-)100.8
101.6 Q(controlled stream of unreliable unicast datagrams.)100.8 114.6 Q
(DCCP uses Congestion Control)5.5 E(Identi\214ers, or CCIDs, to determi\
ne the congestion control mechanism in use on a half-)100.8 127.6 Q 2.75
(connection. \(A)100.8 140.6 R
(half-connection might consist of data pack)2.75 E
(ets sent from DCCP A to DCCP)-.11 E(B, plus ackno)100.8 153.6 Q
(wledgements sent from DCCP B to DCCP A. DCCP A is the HC-Sender)-.275 E
2.75(,a)-.44 G(nd)-2.75 E(DCCP B the HC-Recei)100.8 166.6 Q -.165(ve)
-.275 G .88 -.44(r, f).165 H
(or this half-connection. In this document, I abbre).44 E(viate HC-)
-.275 E(Sender and HC-Recei)100.8 179.6 Q -.165(ve)-.275 G 2.75(ra).165
G 2.75(s")-2.75 G(sender" and "recei)-2.75 E -.165(ve)-.275 G
(r", respecti).165 E -.165(ve)-.275 G(ly).165 E 2.75(.T)-.715 G
(hese terms are de\214ned)-2.75 E(more fully in [DCCP].\))100.8 192.6 Q
(DCCP CCID 3, TCP-Friendly Rate Control \(TFRC\) [CCID 3)5.5 E(PR)100.8
205.6 Q(OFILE], de\214nes a recei)-.44 E -.165(ve)-.275 G -.22(r-).165 G
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(friendly send rate, while minimizing abrupt rate changes [RFC 3448].)
100.8 218.6 Q(This document describes the Thin v)100.8 235.2 Q
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261.2 Q(alues that features may tak)-.275 E(e, and so forth.)-.11 E
(CCID 3-Thin w)5.5 E(as designed)-.11 E(for small clients and serv)100.8
274.2 Q(ers where a full DCCP implementation w)-.165 E(ould be too e)
-.11 E(xpensi)-.165 E -.165(ve)-.275 G(.).165 E(Note that this v)100.8
290.8 Q(ersion of this document is more a proof-of-concept than a \214n\
al proposal.)-.165 E(The right set of restrictions for CCID 3-Thin shou\
ld be subject to further discussion.)100.8 303.8 Q -.165(Fo)5.5 G(r).165
E -.165(ex)100.8 316.8 S
(ample, a \214nal CCID 3-Thin might support ECN.).165 E
(This document assumes f)100.8 333.4 Q
(amiliarity with both DCCP proper [DCCP] and the CCID 3)-.11 E
(pro\214le [CCID 3 PR)100.8 346.4 Q(OFILE].)-.44 E F1(2.)72 372.4 Q F2
(Con)5.5 E -.14(ve)-.56 G(ntions).14 E F0(The k)100.8 389 Q .33 -.165
(ey w)-.11 H(ords "MUST", "MUST NO).055 E(T", "REQ)-.44 E
(UIRED", "SHALL", "SHALL NO)-.11 E(T",)-.44 E("SHOULD", "SHOULD NO)100.8
402 Q(T", "RECOMMENDED",)-.44 E("MA)5.5 E(Y", and "OPTION)-1.155 E
(AL" in this)-.385 E
(document are to be interpreted as described in [RFC 2119].)100.8 415 Q
F1(3.)72 441 Q F2(The CCID 3-Thin Option)5.5 E/F3 11/Courier@0 SF
(+--------+--------+)100.8 460 Q(|11000011|00000010|)100.8 473 Q
(+--------+--------+)100.8 486 Q 13.2(Type=195 Len=2)107.4 499 R F0
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(ets in a CCID 3 connection to indicate)-.11 E
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100.8 531 Q(It is a CCID-speci\214c)5.5 E(option, which means that the \
CCID feature must be set to 3 before the CCID 3-Thin option)100.8 544 Q
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atory options)100.8 557 Q(that ne)100.8 570 Q(gotiate the CCID.)-.165 E
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\(T)100.8 586.6 Q(ype \).)-.88 E(This will)5.5 E(force the recei)100.8
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D 3-Thin)-.275 E(restrictions, belo)100.8 612.6 Q -.715(w.)-.275 G F1
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117.3 714.4 Q 2.75(ec)-.11 G(ompletes.)-2.75 E -.385(Ko)72 769 S 312.793
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(alue 0 \(ECN incapable\).)-.11 E(All pack)5.5 E(ets are sent as)-.11 E
(ECN-incapable.)117.3 131.2 Q 12.65<8342>100.8 147.8 S
(oth Ack Ratio features ha)-12.65 E .33 -.165(ve v)-.22 H
(alue 0 \(Ack Ratio not in use\).)-.11 E 12.65<8342>100.8 164.4 S
(oth Send Ack V)-12.65 E(ector features ha)-1.221 E .33 -.165(ve v)-.22
H(alue 0 \(do not send Ack V)-.11 E(ectors; the def)-1.221 E 2.75
(ault\). No)-.11 F(Ack V)117.3 177.4 Q(ector options will be sent.)
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100.8 236.6 S(oth Minimum Checksum Co)-12.65 E -.165(ve)-.165 G
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(alue 0 \(require full Checksum)-.11 E(Co)117.3 249.6 Q -.165(ve)-.165 G
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(Data Checksum options will be sent.)2.75 E 12.65<8342>100.8 308.8 S
(oth Send Loss Ev)-12.65 E(ent Rate features ha)-.165 E .33 -.165(ve v)
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(oth Send Loss Interv)-12.65 E(als features ha)-.275 E .33 -.165(ve v)
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(2. DCCP-Response)117.3 401.2 R(pack)2.75 E
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(3. DCCP-Data)117.3 417.8 R(pack)2.75 E(ets with no options.)-.11 E
6.116(4a. DCCP-Ack)117.3 434.4 R(pack)2.75 E(ets with no options.)-.11 E
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.33 -.165(ve R)-.275 H(ate with length).165 E(6; P)139.3 477 Q
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(DCCP-Ack that contains other options; see Section 5.4.)139.3 506.6 Q 11
(5. DCCP-Close)117.3 523.2 R(pack)2.75 E(ets with no options.)-.11 E 11
(6. DCCP-Reset)117.3 539.8 R(pack)2.75 E(ets with no options.)-.11 E 11
(7. DCCP-Sync)117.3 556.4 R(pack)2.75 E(ets with no options.)-.11 E 11
(8. DCCP-SyncAck)117.3 573 R(pack)2.75 E(ets with no options.)-.11 E
12.65<8350>100.8 589.6 S(ack)-12.815 E(ets that w)-.11 E
(ould normally be reported with Data Dropped are instead treated as)-.11
E(netw)117.3 602.6 Q(ork losses \(the)-.11 E 2.75(yi)-.165 G
(ncrease the reported Loss Ev)-2.75 E(ent Rate\).)-.165 E 12.65<8346>
100.8 619.2 S(ollo)-12.815 E
(wing from the earlier restrictions, neither DCCP will e)-.275 E -.165
(ve)-.275 G 2.75(rs).165 G(end Slo)-2.75 E 2.75(wR)-.275 G(ecei)-2.75 E
-.165(ve)-.275 G .88 -.44(r, I).165 H(nit).44 E(Cookie, Ack V)117.3
632.2 Q(ector)-1.221 E 2.75(,D)-.44 G(ata Dropped \(e)-2.75 E
(xcept on a DCCP-Response\), T)-.165 E(imestamp,)-.385 E -.385(Ti)117.3
645.2 S(mestamp Echo, Identi\214cation, Challenge, P).385 E
(ayload Checksum, or Loss Interv)-.165 E(als)-.275 E
(options, or DCCP-DataAck or DCCP-CloseReq pack)117.3 658.2 Q(ets.)-.11
E 2.75(AC)100.8 674.8 S
(CID 3-Thin connection is a normal DCCP connection, and MUST follo)-2.75
E 2.75(wt)-.275 G(he DCCP)-2.75 E([DCCP] and CCID 3 [CCID 3 PR)100.8
687.8 Q(OFILE] speci\214cations, e)-.44 E(xcept that if an)-.165 E 2.75
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(restrictions is violated, the recei)100.8 700.8 Q
(ving DCCP SHOULD reset the connection with Reason)-.275 E(195, Thin V)
100.8 713.8 Q(iolation.)-.66 E -.385(Ko)72 769 S 312.793(hler Section)
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5.5 E(means that a client or serv)100.8 114.6 Q
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(and agrees to abide by those restrictions itself.)100.8 127.6 Q("F)5.5
E(at" clients and/or serv)-.165 E(ers can)-.165 E(communicate with an)
100.8 140.6 Q 2.75(yD)-.165 G(CCP)-2.75 E(.)-1.221 E F1(5.1.)72 166.6 Q
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(At)100.8 183.2 S(hin client initiating a connection to an)-2.75 E 2.75
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E(containing only the follo)100.8 196.2 Q(wing options in this e)-.275 E
(xact order: Mandatory)-.165 E 2.75(,C)-.715 G(hange L\(CCID, 3\),)-2.75
E(Mandatory)100.8 209.2 Q 2.75(,C)-.715 G(hange R\(CCID, 3\), Mandatory)
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(adding, P)-.165 E(adding.)-.165 E/F4 11/Courier@0 SF
(+--------+--------+--------+--------+)100.8 228.2 Q
(|00000001|00100000|00000100|00000001|)100.8 241.2 Q
(|Mand'ory|Change L| Len=4)100.8 254.2 Q 13.2(|C)13.2 G 6.6(CID |)-13.2
F(+--------+--------+--------+--------+)100.8 267.2 Q
(|00000011|00000001|00100010|00000100|)100.8 280.2 Q 13.2(|T)100.8 293.2
S 6.6(FRC |Mand'ory|Change)-13.2 F(R| Len=4)6.6 E(|)13.2 E
(+--------+--------+--------+--------+)100.8 306.2 Q
(|00000001|00000011|00000001|11000001|)100.8 319.2 Q 13.2(|C)100.8 332.2
S 6.6(CID | TFRC |Mand'ory|)-13.2 F(3-Thin |)6.6 E
(+--------+--------+--------+--------+)100.8 345.2 Q
(|00000010|00000000|00000000|00000000|)100.8 358.2 Q 6.6(|L)100.8 371.2
S 6.6(en=2 |Padding)-6.6 F(|Padding |Padding |)6.6 E
(+--------+--------+--------+--------+)100.8 384.2 Q F0
(The DCCP-Request MUST NO)100.8 403.2 Q 2.75(Tc)-.44 G(ontain data.)
-2.75 E F1(5.2.)72 429.2 Q F3(Ser)5.5 E -.13(ve)-.13 G 3.25(rR).13 G
(esponds to Thin Client)-3.25 E F0 2.75(As)100.8 445.8 S(erv)-2.75 E
(er responding to this pack)-.165 E
(et sequence will \214rst change both CCID features to 3)-.11 E 2.75
(\(TFRC\). If)100.8 458.8 R(TFRC is not acceptable to the serv)2.75 E
(er)-.165 E 2.75(,i)-.44 G 2.75(tM)-2.75 G
(UST reset the connection, since the)-2.75 E(Change options are mark)
100.8 471.8 Q(ed as Mandatory)-.11 E 5.5(.T)-.715 G(he serv)-5.5 E
(er will then process the Mandatory)-.165 E(CCID 3-Thin option.)100.8
484.8 Q(If the serv)5.5 E(er agrees to the CCID 3-Thin restrictions abo)
-.165 E -.165(ve)-.165 G 2.75(,i).165 G 2.75(tM)-2.75 G(UST)-2.75 E
(send a DCCP-Response pack)100.8 497.8 Q(et containing only the follo)
-.11 E(wing options, in this order:)-.275 E
(Con\214rm R\(CCID 3\), Con\214rm L\(CCID, 3\), Mandatory)100.8 510.8 Q
2.75(,C)-.715 G(CID 3-Thin, and P)-2.75 E(adding.)-.165 E F4
(+--------+--------+--------+--------+)100.8 529.8 Q
(|00100011|00000100|00000001|00000011|)100.8 542.8 Q(|ConfirmR| Len=4)
100.8 555.8 Q 13.2(|C)13.2 G 6.6(CID | TFRC |)-13.2 F
(+--------+--------+--------+--------+)100.8 568.8 Q
(|00100001|00000100|00000001|00000011|)100.8 581.8 Q(|ConfirmL| Len=4)
100.8 594.8 Q 13.2(|C)13.2 G 6.6(CID | TFRC |)-13.2 F
(+--------+--------+--------+--------+)100.8 607.8 Q
(|00000001|11000001|00000010|00000000|)100.8 620.8 Q
(|Mand'ory| 3-Thin | Len=2)100.8 633.8 Q(|Padding |)13.2 E
(+--------+--------+--------+--------+)100.8 646.8 Q F0(The serv)100.8
665.8 Q
(er SHOULD reset the connection if the DCCP-Request does not follo)-.165
E 2.75(wt)-.275 G(he)-2.75 E(CCID 3-Thin restrictions -- for e)100.8
678.8 Q(xample, if the CCID 3-Thin option is follo)-.165 E(wed by other)
-.275 E(options.)100.8 691.8 Q(If the serv)100.8 708.4 Q(er does not un\
derstand the CCID 3-Thin option, or does not agree to the Thin)-.165 E(\
restrictions, it MUST reset the connection with Reason set to Option Er\
ror \(because of the)100.8 721.4 Q -.385(Ko)72 769 S 304.543
(hler Section).385 F 2.75(5.2. [P)2.75 F(age 5])-.165 E 0 Cg EP
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E -.13(ve)-.13 G 3.25(rR).13 G(esponds to F)-3.25 E(at Client)-.325 E F0
2.75(At)100.8 127.6 S(hin serv)-2.75 E(er might be contacted by a f)
-.165 E(at client, which might send options and feature)-.11 E -.275(va)
100.8 140.6 S(lues on its DCCP-Request that do not follo).275 E 2.75(wt)
-.275 G(he CCID 3-Thin restrictions.)-2.75 E(The serv)5.5 E(er)-.165 E
(MUST process these options, b)100.8 153.6 Q
(ut not necessarily as a con)-.22 E -.165(ve)-.44 G(ntional DCCP w).165
E 2.75(ould. In)-.11 F(particular:)100.8 166.6 Q 12.65<8354>100.8 183.2
S(he serv)-12.65 E
(er MUST process options immediately preceded by a Mandatory option.)
-.165 E(If a)5.5 E
(Mandatory option does not \214t the CCID 3-Thin restrictions, the serv)
117.3 196.2 Q(er MUST reset the)-.165 E
(connection with Reason set to Option Error)117.3 209.2 Q 5.5(.I)-.605 G
2.75(faM)-5.5 G(andatory option does \214t the)-2.75 E
(restrictions, the serv)117.3 222.2 Q
(er SHOULD respond as required; for e)-.165 E(xample, when sent a)-.165
E(Mandatory Change option with acceptable v)117.3 235.2 Q
(alues, the serv)-.275 E(er SHOULD respond with)-.165 E
(the appropriate Con\214rm option.)117.3 248.2 Q(An e)5.5 E
(xtremely restricted serv)-.165 E(er MA)-.165 E 2.75(Yi)-1.155 G
(nstead choose to)-2.75 E
(reset the connection \(with Reason set to Option Error\) whene)117.3
261.2 Q -.165(ve)-.275 G 2.75(ra).165 G .33 -.165(ny M)-2.75 H
(andatory option).165 E(is recei)117.3 274.2 Q -.165(ve)-.275 G(d.).165
E 12.65<8354>100.8 290.8 S(he serv)-12.65 E
(er SHOULD process non-Mandatory options as well.)-.165 E -.165(Fo)5.5 G
2.75(re).165 G(xample, when sent)-2.915 E 2.75(aC)117.3 303.8 S
(hange L\(CCID, 2\) option, the serv)-2.75 E
(er SHOULD reset the connection with Reason set)-.165 E(to Fruitless Ne)
117.3 316.8 Q(gotiation; b)-.165 E
(ut when sent a Change L\(CCID, 1 2 3\) option, the serv)-.22 E(er)-.165
E(SHOULD respond with a Con\214rm R\(CCID, 3\) option.)117.3 329.8 Q
(An e)5.5 E(xtremely restricted serv)-.165 E(er)-.165 E(MA)117.3 342.8 Q
2.75(Yi)-1.155 G(nstead ignore all non-mandatory options; the f)-2.75 E
(at client will perform the)-.11 E
(necessary settings \(or reset the connection\) when it recei)117.3
355.8 Q -.165(ve)-.275 G 2.75(st).165 G(he serv)-2.75 E(er')-.165 E 2.75
(sM)-.605 G(andatory)-2.75 E(CCID 3-Thin option.)117.3 368.8 Q 12.65
<8349>100.8 385.4 S 2.75(ft)-12.65 G
(he DCCP-Request contains data, the serv)-2.75 E(er')-.165 E 2.75(sD)
-.605 G(CCP-Response MUST contain a)-2.75 E(Data Dropped option with Dr\
op Code 0 \(data dropped due to protocol constraints\).)117.3 398.4 Q
12.65<8341>100.8 415 S .33 -.165(ny D)-12.65 H
(CCP-Response MUST contain Mandatory feature ne).165 E
(gotiation options that set)-.165 E(both CCIDs to 3, follo)117.3 428 Q
(wed by a Mandatory CCID 3-Thin option.)-.275 E(The feature)5.5 E(ne)
117.3 441 Q
(gotation options might be Mandatory Change L\(CCID, 3\) and Mandatory)
-.165 E(Change R\(CCID, 3\) options, as in the thin-client case; or if \
the serv)117.3 454 Q(er processed one or)-.165 E
(more Change\(CCID\) options on the DCCP-Request, the)117.3 467 Q 2.75
(ym)-.165 G(ight be Con\214rm options.)-2.75 E F1(5.4.)72 493 Q F2 -.325
(Fa)5.5 G 3.25(tC).325 G(lient Responds to Thin Ser)-3.25 E -.13(ve)-.13
G(r').13 E 3.25(sR)-.481 G(esponse)-3.25 E F0 2.75(Af)100.8 509.6 S
(at client recei)-2.86 E
(ving a DCCP-Response containing a Mandatory CCID 3-Thin option)-.275 E
(MUST either reset the connection, if it cannot abide by the CCID 3-Thi\
n restrictions, or)100.8 522.6 Q(respond with a DCCP-Ack.)100.8 535.6 Q
(This DCCP-Ack MUST complete an)5.5 E 2.75(yf)-.165 G(eature ne)-2.75 E
(gotiations)-.165 E(initiated by the DCCP-Response, and MUST also conta\
in a CCID 3-Thin option \(either)100.8 548.6 Q(Mandatory or not\).)100.8
561.6 Q(The thin serv)100.8 578.2 Q
(er MUST be prepared to handle such a DCCP-Ack, b)-.165 E(ut it MA)-.22
E 2.75(Yi)-1.155 G(gnore the)-2.75 E(feature ne)100.8 591.2 Q
(gotiation options on that Ack.)-.165 E(Because the serv)5.5 E
(er sent a Mandatory)-.165 E
(CCID 3-Thin option on its DCCP-Response, it can assume that an)100.8
604.2 Q 2.75(ye)-.165 G(nsuing DCCP-Ack)-2.75 E
(abides by the CCID 3-Thin restrictions.)100.8 617.2 Q F1(6.)72 643.2 Q
/F3 14/Times-Bold@0 SF(Security Considerations)5.5 E F0
(Security considerations for DCCP ha)100.8 659.8 Q .33 -.165(ve b)-.22 H
(een discussed in [DCCP]; security considerations).165 E(for TFRC ha)
100.8 672.8 Q .33 -.165(ve b)-.22 H
(een discussed in [RFC 3448]; and security considerations for DCCP).165
E(CCID 3 ha)100.8 685.8 Q .33 -.165(ve b)-.22 H
(een discussed in [CCID 3 PR).165 E 2.75(OFILE]. CCID)-.44 F
(3-Thin is not as secure ag)2.75 E(ainst)-.055 E
(spoofed feedback, misbeha)100.8 698.8 Q(ving recei)-.22 E -.165(ve)
-.275 G(rs, and DOS attacks as straight DCCP with CCID 3.).165 E
(In particular)100.8 711.8 Q 2.75(,C)-.44 G
(CID 3-Thin does not support ECN, so the ECN Nonce-based v)-2.75 E
(eri\214cation)-.165 E(mechanisms of CCID 3 are not a)100.8 724.8 Q
-.275(va)-.22 G(ilable to it.).275 E -.385(Ko)72 769 S 312.793
(hler Section).385 F 2.75(6. [P)2.75 F(age 6])-.165 E 0 Cg EP
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Q/F2 14/Times-Bold@0 SF(IAN)5.5 E 3.5(AC)-.28 G(onsiderations)-3.5 E F0
(The CCID 3-Thin speci\214cation allocates tw)100.8 101.6 Q 2.75(ov)-.11
G(alues from IAN)-3.025 E(A-administered re)-.385 E(gistries:)-.165 E
12.65<8354>100.8 118.2 S
(he CCID 3-speci\214c option 195, for CCID 3-Thin.)-12.65 E 12.65<8354>
100.8 134.8 S(he CCID 3-speci\214c Reset Reason 195, for Thin V)-12.65 E
(iolation.)-.66 E F1(8.)72 160.8 Q F2(Thanks)5.5 E F0(Thanks to T)100.8
177.4 Q(om Phelan for his DCCP-Lite draft, which sho)-.88 E
(wed what he thought could be)-.275 E(elided from full CCID 3.)100.8
190.4 Q F2(Normati)72 216.4 Q .28 -.14(ve R)-.14 H(efer).14 E(ences)
-.252 E F0([CCID 2 PR)100.8 233 Q(OFILE] S. Flo)-.44 E(yd and E. K)-.11
E(ohler)-.385 E 5.5(.P)-.605 G
(ro\214le for DCCP Congestion Control ID 2:)-5.5 E(TCP-lik)129.6 246 Q
2.75(eC)-.11 G(ongestion Control, draft-ietf-dccp-ccid2-06.txt, w)-2.75
E(ork in progress.)-.11 E([CCID 3 PR)100.8 262.6 Q(OFILE] S. Flo)-.44 E
(yd, E. K)-.11 E(ohler)-.385 E 2.75(,a)-.44 G(nd J. P)-2.75 E(adh)-.165
E 2.75(ye. Pro\214le)-.055 F(for DCCP Congestion)2.75 E(Control ID 3: T\
CP-Friendly Rate Control, draft-ietf-dccp-ccid3-06.txt, w)129.6 275.6 Q
(ork in)-.11 E(progress.)129.6 288.6 Q([DCCP] E. K)100.8 305.2 Q(ohler)
-.385 E 2.75(,M)-.44 G 2.75(.H)-2.75 G(andle)-2.75 E 1.43 -.715(y, S)
-.165 H 2.75(.F).715 G(lo)-2.75 E(yd, and J. P)-.11 E(adh)-.165 E 2.75
(ye. Datagram)-.055 F(Congestion Control)2.75 E
(Protocol, draft-ietf-dccp-spec-07.txt, w)129.6 318.2 Q
(ork in progress.)-.11 E([RFC 2119] S. Bradner)100.8 334.8 Q 5.5(.K)
-.605 G .33 -.165(ey W)-5.775 H(ords F)-.715 E
(or Use in RFCs to Indicate Requirement Le)-.165 E -.165(ve)-.275 G(ls.)
.165 E(RFC 2119.)129.6 347.8 Q([RFC 3448] M. Handle)100.8 364.4 Q 1.43
-.715(y, S)-.165 H 2.75(.F).715 G(lo)-2.75 E(yd, J. P)-.11 E(adh)-.165 E
(ye, and J. W)-.055 E(idmer)-.44 E 5.5(.T)-.605 G
(CP Friendly Rate Control)-5.5 E(\(TFRC\): Protocol Speci\214cation.)
129.6 377.4 Q(RFC 3448.)5.5 E F2 -.7(Au)72 403.4 S(thors' Addr).7 E
(esses)-.252 E F0(Eddie K)100.8 420 Q(ohler <k)-.385 E
(ohler@cs.ucla.edu>)-.11 E(4531C Boelter Hall)100.8 433 Q
(UCLA Computer Science Department)100.8 446 Q(Los Angeles, CA 90095)
100.8 459 Q(USA)100.8 472 Q F2(Full Copyright Statement)72 498 Q F0(Cop)
100.8 514.6 Q(yright \(C\) The Internet Society 2004.)-.11 E
(This document is subject to the rights, licenses)5.5 E
(and restrictions contained in BCP 78, and e)100.8 527.6 Q
(xcept as set forth therein, the authors retain all)-.165 E
(their rights.)100.8 540.6 Q
(This document and the information contained herein are pro)100.8 557.2
Q(vided on an "AS IS" basis and)-.165 E(THE CONTRIB)100.8 570.2 Q(UT)
-.11 E(OR, THE ORGANIZA)-.198 E(TION HE/SHE REPRESENTS OR IS)-1.221 E
(SPONSORED BY \(IF ANY\), THE INTERNET SOCIETY AND THE INTERNET)100.8
583.2 Q(ENGINEERING T)100.8 596.2 Q(ASK FORCE DISCLAIM ALL W)-1.023 E
(ARRANTIES, EXPRESS OR)-1.32 E(IMPLIED, INCLUDING B)100.8 609.2 Q(UT NO)
-.11 E 2.75(TL)-.44 G(IMITED T)-2.75 E 2.75(OA)-.198 G(NY W)-2.75 E
(ARRANTY THA)-1.32 E 2.75(TT)-1.221 G(HE USE)-2.75 E(OF THE INFORMA)
100.8 622.2 Q(TION HEREIN WILL NO)-1.221 E 2.75(TI)-.44 G
(NFRINGE ANY RIGHTS OR ANY)-2.75 E(IMPLIED W)100.8 635.2 Q
(ARRANTIES OF MERCHANT)-1.32 E(ABILITY OR FITNESS FOR A)-1.023 E -1.012
(PA)100.8 648.2 S -.66(RT)1.012 G(ICULAR PURPOSE.).66 E F2
(Intellectual Pr)72 674.2 Q(operty)-.252 E F0(The IETF tak)100.8 690.8 Q
(es no position re)-.11 E -.055(ga)-.165 G(rding the v).055 E
(alidity or scope of an)-.275 E 2.75(yI)-.165 G(ntellectual Property)
-2.75 E(Rights or other rights that might be claimed to pertain to the \
implementation or use of the)100.8 703.8 Q
(technology described in this document or the e)100.8 716.8 Q
(xtent to which an)-.165 E 2.75(yl)-.165 G(icense under such rights)
-2.75 E -.385(Ko)72 769 S 362.293(hler [P).385 F(age 7])-.165 E 0 Cg EP
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(January 2005)2.75 E(July 2004)123.726 E(might or might not be a)100.8
85 Q -.275(va)-.22 G(ilable; nor does it represent that it has made an)
.275 E 2.75(yi)-.165 G(ndependent)-2.75 E(ef)100.8 98 Q
(fort to identify an)-.275 E 2.75(ys)-.165 G(uch rights.)-2.75 E
(Information on the procedures with respect to rights in)5.5 E
(RFC documents can be found in BCP 78 and BCP 79.)100.8 111 Q
(Copies of IPR disclosures made to the IETF Secretariat and an)100.8
127.6 Q 2.75(ya)-.165 G(ssurances of licenses to)-2.75 E(be made a)100.8
140.6 Q -.275(va)-.22 G(ilable, or the result of an attempt made to obt\
ain a general license or).275 E(permission for the use of such propriet\
ary rights by implementers or users of this)100.8 153.6 Q(speci\214cati\
on can be obtained from the IETF on-line IPR repository at)100.8 166.6 Q
(http://www)100.8 179.6 Q(.ietf.or)-.715 E(g/ipr)-.198 E(.)-.605 E
(The IETF in)100.8 196.2 Q(vites an)-.44 E 2.75(yi)-.165 G
(nterested party to bring to its attention an)-2.75 E 2.75(yc)-.165 G
(op)-2.75 E(yrights, patents or)-.11 E
(patent applications, or other proprietary rights that may co)100.8
209.2 Q -.165(ve)-.165 G 2.75(rt).165 G(echnology that may be)-2.75 E
(required to implement this standard.)100.8 222.2 Q
(Please address the information to the IETF at ietf-)5.5 E(ipr@ietf.or)
100.8 235.2 Q(g.)-.198 E -.385(Ko)72 769 S 362.293(hler [P).385 F
(age 8])-.165 E 0 Cg EP
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