协议分析SIP协议分析总结Word文件下载.docx
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Status-Line=SIP-VersionSPStatus-CodeSPReason-PhraseCRLF
SIP/2.0100Trying
状态码给机器翻译使用，Reason-Phrase给用户查看使用，状态码范围如下，第一个数字为类别代表，共3个数字。
1xx:
Provisional--requestreceived,continuingtoprocessthe
request;
2xx:
Success--theactionwassuccessfullyreceived,understood,
andaccepted;
3xx:
Redirection--furtheractionneedstobetakeninorderto
completetherequest;
4xx:
ClientError--therequestcontainsbadsyntaxorcannotbe
fulfilledatthisserver;
5xx:
ServerError--theserverfailedtofulfillanapparently
validrequest;
6xx:
GlobalFailure--therequestcannotbefulfilledatany
server.
3、头域格式（HeaderFieldFormat）
field-name:
field-value
实例：
Via:
SIP/2.0/UDP192.168.83.166:
59888;
branch=z9hG4bK-d87543-fe184d2d9922c37b-1--d87543-;
rport
冒号左域可以有空格举例如下：
Subject:
lunch
Subject:
lunch
头域值可以为多行，在每行前面至少有一个空格或Tab，下面两张表达是相等的。
Iknowyou'
rethere,pickupthephoneandtalktome!
rethere,
pickupthephone
andtalktome!
下面的2种方式有的相等，有的不相等,不相等的原因主要是顺序不同。
Thefollowinggroupsofheaderfieldrowsarevalidandequivalent:
Route:
&
sip:
alice@&
Lunch
bob@&
carol@&
&
LunchSubject:
Eachofthefollowingblocksisvalidbutnotequivalenttothe
others:
&
大小写敏感问题：
对于域名，域值参数名和参数值都不区分大小写，但对于值所引用的字符串是区分大小的。
field-value*（;
parameter-name=parameter-value）
Contact:
;
expires=3600isequivalenttoCONTACT:
ExPiReS=3600andContent-Disposition:
session;
handling=optionalisequivalenttocontent-disposition:
Session;
HANDLING=OPTIONALThefollowingtwoheaderfieldsarenotequivalent:
Warning:
370devnull"
Chooseabiggerpipe"
CHOOSEABIGGERPIPE"
4、请求头域和响应头域是不同的，如果请求头域在响应中则直接被忽略，具体可参考RFC3261。
where中R为请求，r为响应
Example:
HeaderfieldwhereproxyACKBYECANINVOPTREG
___________________________________________________________
AcceptR-o-om*o
Accept2xx---om*o
Accept415-c-ccc
Accept-EncodingR-o-ooo
Accept-Encoding2xx---om*o
Accept-Encoding415-c-ccc
Accept-LanguageR-o-ooo
Accept-Language2xx---om*o
Accept-Language415-c-ccc
Alert-InfoRar---o--
Alert-Info180ar---o--
AllowR-o-ooo
Allow2xx-o-m*m*o
Allowr-o-ooo
Allow405-m-mmm
Authentication-Info2xx-o-ooo
AuthorizationRoooooo
Call-IDcrmmmmmm
Call-Infoar---ooo
ContactRo--moo
Contact1xx---o--
Contact2xx---moo
Contact3xxd-o-ooo
Contact485-o-ooo
Content-Dispositionoo-ooo
Content-Encodingoo-ooo
Content-Languageoo-ooo
Content-Lengthartttttt
Content-Type**-***
CSeqcrmmmmmm
Dateaoooooo
Error-Info300-699a-ooooo
Expires---o-o
Fromcrmmmmmm
In-Reply-ToR---o--
Max-ForwardsRamrmmmmmm
Min-Expires423-----m
MIME-Versionoo-ooo
Organizationar---oooTable2:
Summaryofheaderfields,A--OHeaderfieldwhereproxyACKBYECANINVOPTREG
___________________________________________________________________
PriorityRar---o--
Proxy-Authenticate407ar-m-mmm
Proxy-Authenticate401ar-ooooo
Proxy-AuthorizationRdroo-ooo
Proxy-RequireRar-o-ooo
Record-RouteRarooooo-
Record-Route2xx,18xmr-oooo-
Reply-To---o--
Requirear-c-ccc
Retry-After404,413,480,486-ooooo
500,503-ooooo
600,603-ooooo
RouteRadrcccccc
Serverr-ooooo
SubjectR---o--
SupportedR-oom*oo
Supported2xx-oom*m*o
Timestampoooooo
Toc
（1）rmmmmmm
Unsupported420-m-mmm
User-Agentoooooo
ViaRamrmmmmmm
Viarcdrmmmmmm
Warningr-ooooo
WWW-Authenticate401ar-m-mmm
WWW-Authenticate407ar-o-oooTable3:
Summaryofheaderfields,P--Z;
（1）:
copiedwithpossible
additionoftagAccept:
application/sdp;
level=1,application/x-private,text/html5、头域可以为精简格式，当报文大于MTU时，可能会出现此类情况。
Content-Type精简为c
Content-Type:
application/sdp
c:
text/html;
charset=ISO-8859-4
ThecompactformoftheCall-IDheaderfieldisi.Examples:
Call-ID:
f81d4fae-7dec-11d0-a765-00a0c91e6bf6@
i:
f81d4fae-7dec-11d0-a765-00a0c91e6bf6@192.0.2.46、请求和响应都可能包含Body，消息体内容和含义由请求和回应方法决定。
INVITEsip:
555@192.168.83.165SIP/2.0Via:
Max-Forwards:
70
1111@192.168.83.166:
59888&
To:
"
555"
555@192.168.83.165&
From:
1111"
1111@192.168.83.165&
tag=c84a0f35
Y2M1ZWQzNjZkZGUyNGZjMDQ3ODViNDQxMWNlYjJkMjg.
CSeq:
2INVITE
Allow:
INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO
Proxy-Authorization:
Digestusername="
realm="
192.168.83.165"
nonce="
f9f1f5c1204f40b398e492c655db4688"
uri="
555@192.168.83.165"
response="
915d59413c734aab76a478152abec187"
algorithm=MD5
User-Agent:
X-Literelease1011astamp39982
Content-Length:
861
v=0
o=-02INIP4192.168.83.166
s=CounterPathX-Lite3.0
c=INIP4192.168.83.166
t=00
m=audio49500RTP/AVP1071191001060105988101
a=alt:
13:
ECRvm16mv+fqLshj192.168.83.16649500
22:
EdbNYVHvKIQdEfz6192.168.245.149500
31:
yDH1BrYbWlB139Ar192.168.204.149500
a=fmtp:
1010-15
a=rtpmap:
107BV32/16000
119BV32-FEC/16000
100SPEEX/16000
106SPEEX-FEC/16000
105SPEEX-FEC/8000
98iLBC/8000
101telephone-event/8000
a=sendrecv
m=video21544RTP/AVP11534
Hc0rAXD9/SSqAFC7192.168.83.16621544
jJ7atS9D+F6f93kw192.168.245.121544
A1p82jJp83lgK3Kn192.168.204.121544
115QCIF=1CIF=1I=1J=1K=1MaxBR=1960
34QCIF=1CIF=1MaxBR=1960
115H263-1998/90000
34H263/90000
7、消息体内容类型可以为压缩格式，可以为Mime格式，可以为TextUTF-8格式。
Examples:
charset=ISO-8859-48、消息体内容长度为一个整形值，不会出现httpchunk的情况。
9、SIP消息，通过消息体长度获取整个消息，SIP可以采用UDP协议，此消息中协商的传输层端口是有限制的，建议tcp、udp使用5060，TLSoverTCP使用5061实际报文交互过程：
REGISTERsip:
192.168.83.165SIP/2.0Via:
branch=z9hG4bK-d87543-d724e90eb209ee27-1--d87543-;
rportMax-Forwards:
70Contact:
rinstance=c5ea7f72275f318f&
To:
From:
tag=c5368845Call-ID:
MWJlMGU0MWMxZTZlY2ExMWUzOWM4ZGU3ZGFmYTg4YWQ.CSeq:
1REGISTERExpires:
3600Allow:
INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFOUser-Agent:
X-Literelease1011astamp39982Content-Length:
0SIP/2.0401UnauthorizedVia:
rportCSeq:
1REGISTERFrom:
tag=c5368845To:
WWW-Authenticate:
digestrealm="
8f19b3b571d04476a8f9eb7dbcf3f236"
Call-ID:
MWJlMGU0MWMxZTZlY2ExMWUzOWM4ZGU3ZGFmYTg4YWQ.Server:
SIPServer2008v3.6.6.773Content-Length:
0REGISTERsip:
branch=z9hG4bK-d87543-3f489b70543a3713-1--d87543-;
2REGISTERExpires:
X-Literelease1011astamp39982Authorization:
dac398335510f0a2455f71e110448320"
algorithm=MD5Content-Length:
0SIP/2.0200OKVia:
rportContact:
CSeq:
2REGISTERFrom:
SIPServer2008v3.6.6.773Date:
Tue,23Jul201318:
35:
06GMTExpires:
3600Content-Length:
0SUBSCRIBEsip:
1111@192.168
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