[Serusers] SIP Torture Tests Using Sip Foundry SFTF

Jiri Kuthan jiri at iptel.org
Mon Mar 28 21:42:29 CEST 2005


At 06:48 AM 3/28/2005, Java Rockx wrote:
>Hi All.
>
>I'm doing some validation checks against my SIP proxy (ser-0.9.1)
>using SFTF http://www.sipfoundry.org/sftf/
>
>I'm seeing that some tests are making further through my ser.cfg than I'd like.
>
>For example, SFTF test case214 sends an INVITE message to SER with an
>invalid Content-Type header.
>
>SER replies with a 404 User Not Found, which is technically correct,
>since the the destination doesn't exist, but SFTF complains that SER
>should have returned a  415 Unsupported Media Type error instead.

That's correct. SFTF aims at testing end-devices. proxy servers are not
supposed to process body, 404 is correct answer in this context.


>So my question is this; even though ser rejected the SIP message,
>shouldn't it have performed some checks on the message to validate
>things like Content-Type, R-URI, etc to make sure the message is not
>corrupt or invalid?

no. Extensibility is a feature, not a bug.


>If not, does it make sense to do so before letting a SIP message get
>too far in to my ser.cfg?
>
>I did find this article in the archives which seems to indicate that
>ser should [happliy] ignore things it doesn't understand - but is this
>safe?

A good proxy server should intervene with signaling as litte as it
can. 

-jiri 




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