📄 rfc3261j.txt
字号:
Alice偼Bob偺SIP傾僀僨儞僥傿僥傿(SIP URI偲屇偽傟傞URI偺堦庬)傪巊梡偟偰
乽捠榖偡傞乿丅SIP URI偵偮偄偰偼僙僋僔儑儞19.1偱掕媊偝傟偰偄傞丅偦傟偼
E-mail傾僪儗僗偲帡偨宍幃偱偁傝丄捠忢丄儐乕僓乕柤偲儂僗僩柤傪娷傓丅偙偺
椺偱偼丄sip:bob@biloxi.com偱偁傞丅偙偙偱丄biloxi.com偼Bob偺SIP僒乕價僗
僾儘僶僀僟偺僪儊僀儞偱偁傞丅Alice偼sip:alice@atlanta.com 偲偄偆SIP URI
傪帩偭偰偄傞丅Alice偼偍偦傜偔丄Bob偺SIP URI傪僉乕儃乕僪偐傜懪偪崬傓偐丄
僴僀僷乕儕儞僋偁傞偄偼傾僪儗僗挔偺僄儞僩儕傪僋儕僢僋偟偨偩傠偆丅SIP偼
傑偨丄SIPS URI偲屇偽傟傞僙僉儏傾側URI傕採嫙偡傞丅椺偊偽丄
sips:bob@biloxi.com偱偁傞丅SIPS URI偵偐偗傜傟偨捠榖偼丄敪屇懁偐傜拝屇懁
偺僪儊僀儞傑偱丄偡傋偰偺SIP儊僢僙乕僕傪揱偊傞偨傔偵僙僉儏傾側埫崋壔偝傟
偨僩儔儞僗億乕僩(偡側傢偪TLS)偑巊梡偝傟傞偙偲傪曐徹偡傞丅偦偙偐傜丄儕僋
僄僗僩偼拝屇懁偺僪儊僀儞偺億儕僔乕偵埶懚偡傞僙僉儏儕僥傿偺巇慻傒傪巊梡
偟偰丄埨慡偵拝屇懁傑偱憲傜傟傞丅
SIP偼HTTP儔僀僋側儕僋僄僗僩/墳摎偺僩儔儞僓僋僔儑儞儌僨儖偵婎偯偄偰偄
傞丅奺僩儔儞僓僋僔儑儞偼丄僒乕僶乕忋偱偁傞摿掕偺儊僜僢僪傑偨偼娭悢傪
屇傃弌偡儕僋僄僗僩偲丄彮側偔偲傕堦偮偺墳摎偐傜側傞丅偙偺椺偱偼丄Alice
偺僜僼僩僼僅儞偑Bob偺SIP URI偵埗偰偰INVITE儕僋僄僗僩傪憲傞偙偲偱僩儔
儞僓僋僔儑儞偑巒傑傞丅INVITE偼丄儕僋僄僗僩憲傞懁(Alice)偑僒乕僶乕(Bob)
偵偲偭偰傎偟偄摦嶌傪巜掕偡傞丄SIP儊僜僢僪偺堦椺偱偁傞丅INVITE儕僋僄僗
僩偼懡偔偺僿僢僟乕僼傿乕儖僪傪娷傓丅僿僢僟乕僼傿乕儖僪偼丄儊僢僙乕僕
偵偮偄偰偺捛壛忣曬傪採嫙偡傞丄柤慜晅偗偝傟偨懏惈偱偁傞丅INVITE拞偵懚
嵼偡傞僿僢僟乕僼傿乕儖僪偼丄屇偺偨傔偺堦堄側幆暿巕丄僨僗僥傿僱乕僔儑
儞傾僪儗僗丄Alice偺傾僪儗僗丄偍傛傃Alice偑Bob偲妋棫偟偨偄僙僢僔儑儞偺
僞僀僾偵偮偄偰偺忣曬傪娷傓丅INVITE(恾1偺儊僢僙乕僕F1)偼師偺傛偆側宍偱
偁傞丅
Rosenberg, et. al. Standards Track [Page 11]
RFC 3261 SIP: Session Initiation Protocol June 2002
atlanta.com . . . biloxi.com
. 僾儘僉僔 僾儘僉僔 .
. .
傾儕僗偺 . . . . . . . . . . . . . . . . . . . . 儃僽偺
僜僼僩僼僅儞 SIP僼僅儞
| | | |
| INVITE F1 | | |
|--------------->| INVITE F2 | |
| 100 Trying F3 |--------------->| INVITE F4 |
|<---------------| 100 Trying F5 |--------------->|
| |<-------------- | 180 Ringing F6 |
| | 180 Ringing F7 |<---------------|
| 180 Ringing F8 |<---------------| 200 OK F9 |
|<---------------| 200 OK F10 |<---------------|
| 200 OK F11 |<---------------| |
|<---------------| | |
| ACK F12 |
|------------------------------------------------->|
| Media Session |
|<================================================>|
| BYE F13 |
|<-------------------------------------------------|
| 200 OK F14 |
|------------------------------------------------->|
| |
恾1: SIP偺僙僢僔儑儞僙僢僩傾僢僾椺(SIP戜宍偁傝)
INVITE sip:bob@biloxi.com SIP/2.0
Via: SIP/2.0/UDP pc33.atlanta.com;branch=z9hG4bK776asdhds
Max-Forwards: 70
To: Bob <sip:bob@biloxi.com>
From: Alice <sip:alice@atlanta.com>;tag=1928301774
Call-ID: a84b4c76e66710@pc33.atlanta.com
CSeq: 314159 INVITE
Contact: <sip:alice@pc33.atlanta.com>
Content-Type: application/sdp
Content-Length: 142
(Alice偺SDP偼帵偝傟偰偄側偄)
僥僉僗僩宍幃偱僄儞僐乕僪偝傟偨儊僢僙乕僕偺嵟弶偺峴偼儊僜僢僪柤(INVITE)
傪娷傓丅偦傟偵懕偔峴偼僿僢僟乕僼傿乕儖僪偺儕僗僩偱偁傞丅偙偺椺偱偼昁
梫偲偝傟傞嵟彫尷偺僼傿乕儖僪偺僙僢僩傪娷傓丅僿僢僟乕偵偮偄偰埲壓偵娙扨
偵弎傋傞丅
Rosenberg, et. al. Standards Track [Page 12]
RFC 3261 SIP: Session Initiation Protocol June 2002
Via偼丄Alice偑偙偺儕僋僄僗僩偵懳偡傞墳摎偺庴怣傪朷傓傾僪儗僗(pc33.atl
anta.com)傪娷傓丅傑偨丄偙偺僩儔儞僓僋僔儑儞傪幆暿偡傞branch僷儔儊乕僞
傕娷傓丅
To偼丄儕僋僄僗僩偑傕偲傕偲嵎偟岦偗傜傟偨愭偺丄昞帵柤(Bob)偲SIP URI傑
偨偼SIPS URI(sip:bob@biloxi.com)傪娷傓丅昞帵柤偵偮偄偰偼RFC2822(嶲峫
暥專[3])偱弎傋傜傟偰偄傞丅
From傕儕僋僄僗僩偺敪怣尦偺昞帵柤(Alice)偲SIP URI傑偨偼SIPS URI(sip:
alice@atlanta.com)傪娷傓丅偙偺僿僢僟乕僼傿乕儖僪偼丄僜僼僩僼僅儞偑URI
偵捛壛偟偨棎悢暥帤楍(1928301774)傪娷傓tag僷儔儊乕僞傕帩偮丅偙傟偼幆暿
偺栚揑偱巊梡偝傟傞丅
Call-ID偼丄棎悢暥帤楍偲僜僼僩僼僅儞偺儂僗僩柤傑偨偼IP傾僪儗僗傪慻傒崌
傢偣偰惗惉偝傟偨丄偙偺屇偺僌儘乕僶儖偵堦堄側幆暿巕傪娷傓丅To tag丄From
tag丄偍傛傃Call-ID偺慻傒崌傢偣偼丄Alice偲Bob偺偁偄偩偺僺傾僣乕僺傾偺
SIP儕儗乕僔儑儞僔僢僾傪姰慡偵掕媊偟丄僟僀傾儘僌偲屇偽傟傞丅
CSeq(Command Sequence)偼丄惍悢抣偲儊僜僢僪柤傪娷傓丅CSeq斣崋偼怴偟偄
儕僋僄僗僩偛偲偵僀儞僋儕儊儞僩偝傟傞丅CSeq斣崋偼僩儔僨傿僔儑僫儖側楢
懕偟偨斣崋偱偁傞丅
Contact偼丄Alice偵僐儞僞僋僩偡傞偨傔偺僟僀儗僋僩儖乕僩傪昞偡丄捠忢偼
姰慡廋忺僪儊僀儞柤(FQDN)偵偍偗傞儐乕僓乕柤偐傜側傞SIP URI傑偨偼SIPS URI
傪娷傓丅FQDN偑朷傑偟偄偲偼偄偊丄懡偔偺僄儞僪僔僗僥儉偼僪儊僀儞柤傪搊
榐偟偰偄側偄偺偱丄IP傾僪儗僗偑嫋壜偝傟偰偄傞丅Via僿僢僟乕僼傿乕儖僪偑
墳摎傪偳偙偵憲傞偐傪懠偺僄儗儊儞僩偵揱偊傞偺偵懳偟偰丄Contact僿僢僟乕
僼傿乕儖僪偼丄崱屻偺儕僋僄僗僩傪偳偙偵憲傞偐傪懠偺僄儗儊儞僩偵揱偊傞丅
Max-Forwards偼丄儕僋僄僗僩偑僨僗僥傿僱乕僔儑儞偵岦偐偆夁掱偱偲傞偙偲
偑偱偒傞儂僢僾悢傪惂尷偡傞偨傔偺栶偵棫偮丅Max-Forwards偼丄奺儂僢僾偛
偲偵1偢偮僨僋儕儊儞僩偝傟傞惍悢偐傜側傞丅
Content-Type偼丄儊僢僙乕僕儃僨傿(椺偱偼帵偝傟偰偄側偄)偺愢柧傪娷傓丅
Content-Length偼丄儊僢僙乕僕儃僨傿偺僆僋僥僢僩(byte)僇僂儞僩傪娷傓丅
SIP僿僢僟乕僼傿乕儖僪偺姰慡側僙僢僩偼僙僋僔儑儞20偱掕媊偝傟偰偄傞丅
僙僢僔儑儞偺徻嵶丄椺偊偽儊僨傿傾偺僞僀僾丄僐乕僨僢僋丄僒儞僾儕儞僌
儗乕僩偼丄SIP傪巊梡偟偰婰弎偝傟側偄丅傓偟傠丄SIP儊僢僙乕僕偺儃僨傿偑丄
懠偺僾儘僩僐儖偺彂幃偱僄儞僐乕僪偝傟偨僙僢僔儑儞偺婰弎傪娷傓丅偦偺傛偆
側彂幃偺堦偮偑僙僢僔儑儞婰弎僾儘僩僐儖(SDP)(RFC2327 嶲峫暥專[1])偱偁
傞丅偙偺SDP儊僢僙乕僕(椺偵偼帵偝傟偰偄側偄)偼丄E-mail儊僢僙乕僕偱
Rosenberg, et. al. Standards Track [Page 13]
RFC 3261 SIP: Session Initiation Protocol June 2002
僪僉儏儊儞僩偺傾僞僢僠儊儞僩偑塣偽傟傞傛偆偵丄偁傞偄偼HTTP儊僢僙乕僕
偱Web儁乕僕偑塣偽傟傞傛偆偵丄SIP儊僢僙乕僕偵傛偭偰塣偽傟傞丅
僜僼僩僼僅儞偼Bob偺応強丄偁傞偄偼biloxi.com僪儊僀儞偺SIP僒乕僶乕偺応
強傪抦傜側偄偺偱丄Alice偺僪儊僀儞(atlanta.com)偺SIP僒乕僶乕偵INVITE傪
憲傞丅atlanta.com偺SIP僒乕僶乕偺傾僪儗僗偼丄椺偊偽丄Alice偺僜僼僩僼僅
儞偵愝掕偝傟偰偄傞偐傕偟傟側偄偟丄偁傞偄偼DHCP偵傛偭偰敪尒偝傟傞傕
偟傟側偄丅
atlanta.com偺SIP僒乕僶乕偼丄僾儘僉僔僒乕僶乕偲偟偰抦傜傟傞僞僀僾偺SIP
僒乕僶乕偱偁傞丅僾儘僉僔僒乕僶乕偼儕僋僄僗僩傪憲偭偨幰偺戙傢傝偵SIP儕
僋僄僗僩傪庴怣偟丄偦傟傪揮憲(forward)偡傞丅[栿拲:埲崀丄transfer偲嬫
暿偟丄乽揮憲(forward)乿丄乽揮憲(transfer)乿偲暪婰丅]偙偺椺偱偼丄僾儘僉
僔僒乕僶乕偑 INVITE儕僋僄僗僩傪庴怣偟丄Alice偺僜僼僩僼僅儞偵100(Trying)
墳摎傪憲傝曉偡丅100(Trying)墳摎偼丄INVITE偑庴怣偝傟丄僾儘僉僔偑Alice偺
僜僼僩僼僅儞偵惉傝戙傢偭偰丄僨僗僥傿僱乕僔儑儞偵INVITE傪儖乕僩偡傞偙偲
傪帋傒偰偄傞偙偲傪帵偡丅SIP偱偺墳摎偼丄悢抣3寘偺僐乕僪偲偦傟偵懕偔愢柧
僼儗乕僘傪梡偄傞丅偙偺墳摎偼丄INVITE偲摨偠To丄From丄Call-ID丄CSeq丄偍傛
傃branch僷儔儊乕僞傪帩偭偨Via傪娷傓丅偙傟偼丄Alice偺僜僼僩僼僅儞偑丄
憲怣偟偨INVITE偵偙偺墳摎傪娭學晅偗傞偙偲傪壜擻偵偡傞丅atlanta.com偺僾
儘僉僔僒乕僶乕偼丄biloxi.com僪儊僀儞偺SIP僒乕僶乕傪尒偮偗傞偨傔偵丄偍
偦傜偔摿掕偺僞僀僾偺DNS(Domain Name Service)儖僢僋傾僢僾傪幚峴偟偰丄
biloxi.com偺僾儘僉僔僒乕僶乕偺応強傪摿掕偡傞丅偙傟偵偮偄偰偼嶲峫暥專
[4]偱弎傋傜傟偰偄傞丅寢壥偲偟偰丄偦傟偼biloxi.com偺僾儘僉僔僒乕僶乕偺
IP傾僪儗僗傪庢摼偟丄INVITE儕僋僄僗僩傪偦偙偵揮憲(forward)(傑偨偼僾儘
僉僔)偡傞丅儕僋僄僗僩傪揮憲(forward)偡傞慜偵丄atlanta.com偺僾儘僉僔僒乕
僶乕偼偦傟帺恎偺傾僪儗僗傪娷傓晅壛揑側Via僿僢僟乕僼傿乕儖僪抣傪捛壛偡
傞(INVITE 偼嵟弶偺Via偵Alice偺傾僪儗僗傪偡偱偵娷傫偱偄傞)丅biloxi.com偺
僾儘僉僔僒乕僶乕偼INVITE傪庴怣偟丄偦傟偑INVITE傪庴怣偟儕僋僄僗僩傪張棟
偟偰偄傞偙偲傪帵偡偨傔偵丄atlanta.com偺僾儘僉僔僒乕僶乕偵100(Trying)墳
摎偱墳摎偡傞丅僾儘僉僔僒乕僶乕偼丄Bob偺尰嵼偺IP傾僪儗僗傪娷傓堦斒揑偵
儘働乕僔儑儞僒乕價僗偲屇偽傟傞僨乕僞儀乕僗偵栤偄崌傢偣傞丅(偙偺僨乕僞
儀乕僗傪偳偺傛偆偵偟偰懚嵼偝偣傞偙偲偑偱偒傞偐丄師偺僙僋僔儑儞偱傢偐傞
偩傠偆丅)biloxi.com偺僾儘僉僔僒乕僶乕偼丄偦傟帺恎偺傾僪儗僗傪娷傓傕偆堦
偮偺Via僿僢僟乕僼傿乕儖僪抣傪INVITE偵捛壛偟丄偦傟傪Bob偺SIP僼僅儞偵僾儘
僉僔偡傞丅
Bob偺SIP僼僅儞偼INVITE傪庴怣偡傞偲丄Bob偑Alice偐傜偐偐偭偰偒偨捠榖傪
庴偗傞偐偳偆偐寛掕偱偒傞傛偆偵丄偦偺捠榖傪Bob偵抦傜偣傞丅偮傑傝丄Bob
偺揹榖偑柭傞丅Bob偺SIP僼僅儞偼丄2偮偺僾儘僉僔傪媡岦偒偵儖乕僩偝傟偰曉
偝傟傞丄180(Ringing)墳摎偱偙偺偙偲傪帵偡丅奺僾儘僉僔偼丄墳摎傪偳偙偵
憲傞偐寛掕偡傞偨傔偵Via僿僢僟乕僼傿乕儖僪傪巊梡偟丄愭摢偐傜帺暘帺恎偺
傾僪儗僗傪庢傝彍偔丅寢壥偲偟偰丄嵟弶偺INVITE傪儖乕僩偡傞偨傔偵偼DNS偲
儘働乕僔儑儞僒乕價僗偺儖僢僋傾僢僾偑昁梫偲偝傟偨偑丄180(Ringing)墳摎
偼儖僢僋傾僢僾傗僾儘僉僔偱曐帩偝傟偰偄傞僗僥乕僩傪巊梡偣偢偵敪屇懁偵
曉偡偙偲偑偱偒傞丅偙偺偙偲偼傑偨丄INVITE傪尒傞奺僾儘僉僔偼丄偦偺INVITE
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