I've included it below.
In summary:
1. port numbers in To and From shouldn't be used
2. if they are present, they should be ignored.
Table 1 summarizes the use of SIP URI components based on the context
in which the URI appears. The external column describes URIs
appearing anywhere outside of a SIP message, for instance on a web
page or business card. Entries marked "m" are mandatory, those marked
"o" are optional, and those marked "-" are not allowed. Elements
processing URIs SHOULD ignore any disallowed components if they are
present. The second column indicates the default value of an optional
element if it is not present. "--" indicates that the element is
either not optional, or has no default value.
SIP URIs in Contact header fields have different restrictions
depending on the context in which the header field appears. One set
applies to messages that establish and maintain dialogs (INVITE and
its 200 (OK) response). The other applies to registration and
redirection messages (REGISTER, its 200 (OK) response, and 3xx class
responses to any method).
dialog
reg./redir. Contact/
default Req.-URI To From Contact R-R/Route
external
user -- o o o o o o
password -- o o o o o o
host -- m m m m m m
port 5060 o - - o o o
user-param ip o o o o o o
method INVITE - - - - - o
maddr-param -- o - - o o o
ttl-param 1 o - - o - o
transp.-param udp o - - o o o
other-param -- o o o o o o
headers -- - - - o - o
Table 1: Use and default values of URI components for SIP headers,
Request-URI and references
Cheers,
Attila
Attila Sipos
Software Engineer
DDI ( +44 1344 784918 )
<mailto:[EMAIL PROTECTED]>
<http://www.vegastream.com>
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> -----Original Message-----
> From: Alexandre Charest [mailto:[EMAIL PROTECTED]]
> Sent: 28 March 2002 13:38
> To: '???'; [EMAIL PROTECTED]
> Subject: RE: [Sip-implementors] A basic sip question
>
>
> Can you give the reference in bis09 that makes you think that port is
> forbidden in From an To? I could not find it anywhere. Can
> you give the line
> numbers or at least the paragraph?
>
> Alexandre Charest
>
> -----Original Message-----
> From: ??? [mailto:[EMAIL PROTECTED]]
> Sent: March 28, 2002 03:49 AM
> To: luoqiang; [EMAIL PROTECTED]
> Subject: RE: [Sip-implementors] A basic sip question
>
>
> address of ua1 -> Contact
> But, response path is Via header.
> As bis09, From and To don't accept port.
>
> t:sip:[EMAIL PROTECTED]:5060
> ==> t:sip:[EMAIL PROTECTED]
>
> khlee
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of luoqiang
> Sent: Thursday, March 28, 2002 1:34 AM
> To: [EMAIL PROTECTED]
> Subject: [Sip-implementors] A basic sip question
>
>
> Hi,
>
>
> I am a beginer for sip.
> After reading the rfc,I have some questions.
> e.g:
> ua1: sip:[EMAIL PROTECTED]:5060
> ua2: sip:[EMAIL PROTECTED]:5061
> when ua1 call ua2,the message would be:
>
> INVITE sip:[EMAIL PROTECTED]:5061 SIP/2.0
> v:SIP/2.0/UDP 10.10.1.1
> f:sip:[EMAIL PROTECTED]
> t:sip:[EMAIL PROTECTED]:5060
> i:[EMAIL PROTECTED]
> m:[EMAIL PROTECTED]:5061
> c:application/sdp
>
> Suppose there are no proxies between them.
> The message should be forworded to ua2 and ua2 should send a
> 180 response.
> But where does the ua2 get the adress of ua1?
> Via?From?Contact?
> I was puzzled after reading the rfc,because it seems that all
> above headers
> is correct.
> Which is the ua2's chioce?
>
> Thanks!
>
> luoqiang
>
>
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