Wireshark · Ethereal-users: RE: [Ethereal-users] H.225 and H.245 versions in Etheral?

["Ante Ugrina (ST/ETK)" <ante.ugrina@xxxxxxxxxxxx>]

Hi Martin,

I found some fault in ethereal.
We are sending H.225 Setup message from TTCNv3 and ethereal can not decode received message:

H.225.0 CS
    H323_UserInformation
        H323_UU_PDU
            h323_message_body
                h323_message_body: .... .000 : setup (0)
                    SetupUUIE
                        :
				:
				:
                        fastStart
                            Item 0
                                fastStart item length: 39
                                OpenLogicalChannel
                                    LogicalChannelNumber: 1
                                    forwardLogicalChannelParameters
                                        DataType
							:
							:
							:						 
                                        multiplexParameters
                                            Choice -----------------------> here is the fault
                                        something unknown here 

It seems that ethereal has general problem with decoding fastStart element in different H.225 messages
(like Setup, Alerting....).


Best regards
Ante Ugrina


-----Original Message-----
From: Martin Regner [mailto:martin.regner@xxxxxxxxx]
Sent: 28. srpanj 2004 15:30
To: Ethereal user support
Cc: Ante Ugrina (ST/ETK)
Subject: Re: [Ethereal-users] H.225 and H.245 versions in Etheral?


Ante Ugrina wrote:

> We are using Ethereal in some testing purposes for H.225 and H.245
> Which version of H.225 and H.245 are implemented in Ethereal?

Wat I remember it was the h2250v5.asn and h245v9.asn files from packetizer.com that was used when Ronnie prepared
the H.225 and H.245 dissectors about a year ago.
http://www.packetizer.com/iptel/h323/standards.html

There is maybe still some things from these specifications that are not fully decoded yet and there could of course
still be some mistakes in the dissectors.
If there is some specific things you are having problems with you could send a bug-report.

There seems to be a newer version of ASN.1 specs available for H.245, version 10:
http://www.itu.int/ITU-T/asn1/database/itu-t/h/h245/2003v10/MULTIMEDIA-SYSTEM-CONTROL.html
I don't know how much differences there are, but can maybe have a look at it in a couple of weeks if no one else
volonteers.

But the H.225.0 specification is probably still relevant.
http://www.itu.int/ITU-T/asn1/database/itu-t/h/h225-0/2003/H323-MESSAGES.html

H.235 was added recently and is developed based on:
http://www.itu.int/ITU-T/asn1/database/itu-t/h/h235/2003-amd1/H235-SECURITY-MESSAGES.asn