[asterisk-users] Grandstream RTPkeepalive packetscausing Asteriskwarning

Drew Gibson drew at oanda.com
Tue Jul 31 15:23:30 CDT 2007


Thanks Steve,

I'll keep digging,

regards,

Drew


Steve Langstaff wrote:
> Sorry Drew - I don't know enough about Asterisk to comment on the 
> effects of this on the RTP stack.
>
>     *From:* asterisk-users-bounces at lists.digium.com
>     [mailto:asterisk-users-bounces at lists.digium.com] *On Behalf Of
>     *Drew Gibson
>     *Sent:* 31 July 2007 15:02
>     *To:* Asterisk Users Mailing List - Non-Commercial Discussion
>     *Subject:* Re: [asterisk-users] Grandstream RTPkeepalive
>     packetscausing Asteriskwarning
>
>     Thanks Steve,
>
>     am I correct in assuming that Asterisk will ignore this packet? It
>     will not have any harmful effect if the caller is on hold for an
>     hour (120 packets)?
>
>     In order to feed back to Grandstream, is there a "correct" format
>     for a keepalive message or is this one adequate?
>
>     regards,
>
>     Drew
>
>
>
>     Steve Langstaff wrote:
>>     Your Grandstream device is using a UDP message of 8 x 0x00 bytes
>>     as it's RTP keepalive message.
>>      
>>     When Asterisk tries to read this it logs a warning because it is
>>     expecting a valid RTP packet. 
>>
>>         *From:* asterisk-users-bounces at lists.digium.com
>>         <mailto:asterisk-users-bounces at lists.digium.com>
>>         [mailto:asterisk-users-bounces at lists.digium.com] *On Behalf
>>         Of *Drew Gibson
>>         *Sent:* 30 July 2007 19:55
>>         *To:* Asterisk Users Mailing List - Non-Commercial Discussion
>>         *Subject:* Re: [asterisk-users] Grandstream RTP keepalive
>>         packetscausing Asteriskwarning
>>
>>         Hi Steve,
>>
>>         The following packets match the offending warnings on the *
>>         console by time and number of occurrences and . The SRC and
>>         DST ports vary between calls (naturally) but the rest remains
>>         the same.
>>
>>
>>         Frame 3 (60 bytes on wire, 60 bytes captured)
>>         Ethernet II, Src: Grandstr_0b:a5:3e (00:0b:82:0b:a5:3e), Dst:
>>         Dell_3e:05:ac (00:13:72:3e:05:ac)
>>         Internet Protocol, Src: 10.1.10.184 (10.1.10.184), Dst:
>>         10.1.10.1 (10.1.10.1)
>>         User Datagram Protocol, Src Port: avt-profile-1 (5004), Dst
>>         Port: 13608 (13608)
>>             Source port: avt-profile-1 (5004)
>>             Destination port: 13608 (13608)
>>             Length: 16
>>         Checksum: 0x8e5f [correct]
>>         Data (8 bytes)
>>
>>         Data is 8 x null (00)
>>
>>         regards,
>>
>>         Drew
>>
>>
>>
>>         Steve Langstaff wrote:
>>>         Grab a network trace (with e.g. Wireshark) and look at the payload type
>>>         and lengths of the RTP keepalive messages - if you post this information
>>>         to the list I'm sure someone will comment on what's happening.
>>>
>>>           
>>>>         -----Original Message-----
>>>>         From: asterisk-users-bounces at lists.digium.com <mailto:asterisk-users-bounces at lists.digium.com> 
>>>>         [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
>>>>         Drew Gibson
>>>>         Sent: 26 July 2007 19:23
>>>>         To: Asterisk Users Mailing List - Non-Commercial Discussion
>>>>         Subject: [asterisk-users] Grandstream RTP keepalive packets 
>>>>         causing Asteriskwarning
>>>>
>>>>         Grandstream GXP-2000 with firmware 1.1.4.18 (beta) fixes an 
>>>>         issue where the phone did not send rtp keepalives when on 
>>>>         mute (resulting in disconnect from tech support hold and concalls)
>>>>
>>>>         A side effect seems to be that Asterisk pops the following 
>>>>         warning on the console...
>>>>
>>>>         Jul 26 14:06:35 WARNING[31654]: rtp.c:463 ast_rtp_read: RTP 
>>>>         Read too short
>>>>
>>>>         Grandstream say they are not sure what it is but "it should 
>>>>         not affect anything".
>>>>
>>>>         In other words, "Don't worry, be happy!".
>>>>
>>>>         Any thoughts/experience on this?
>>>>
>>>>         regards,
>>>>
>>>>         Drew
>>>>
>>>>         --
>>>>         Drew Gibson
>>>>
>>>>         Systems Administrator
>>>>         OANDA Corporation
>>>>         416-593-6767 x322
>>>>         www.oanda.com <http://www.oanda.com>
>>>>
>>>>
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>>>>
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>>>>
>>>>             
>>>         _______________________________________________
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>>>
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>>>           
>>
>>
>>         -- 
>>         Drew Gibson
>>
>>         Systems Administrator
>>         OANDA Corporation
>>         416-593-6767 x322
>>         www.oanda.com <http://www.oanda.com>
>>             
>>
>>      
>>     _______________________________________________
>>     --Bandwidth and Colocation Provided by http://www.api-digital.com--
>>
>>     asterisk-users mailing list
>>     To UNSUBSCRIBE or update options visit:
>>        http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>     -- 
>     Drew Gibson
>
>     Systems Administrator
>     OANDA Corporation
>     416-593-6767 x322
>     www.oanda.com <http://www.oanda.com>
>         
>
> ------------------------------------------------------------------------
>
> _______________________________________________
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-- 
Drew Gibson

Systems Administrator
OANDA Corporation
416-593-6767 x322
www.oanda.com

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