[OpenSIPS-Users] Engage media proxy corrupts sdp c= when dynamic routing

[Charles Solar]

Definitely not - I know there was a lengthy discussion about calling
use_media_proxy twice and that function a while ago.  The only thing I do
with a natted invite is this:

# NAT test
        if( is_method("INVITE") && !has_totag() )
        {
                $avp(can_uri) = $ru;

                setflag(3); # flag for NAT
                force_rport();
                fix_contact();
                append_hf("P-hint: NAT\r\n");
                xlog( "L_INFO", "Engaging media proxy" );
                engage_media_proxy();
        }

Charles

On Fri, Feb 10, 2012 at 3:54 PM, Brian ipt <voiplists at iptel.co> wrote:

>
>
> On Fri, Feb 10, 2012 at 9:21 PM, Charles Solar <charlessolar at gmail.com>wrote:
>
>> I have been using engage_media_proxy in my script, but it seems to cause
>> problems when I failover in the dynamic routing module.
>> This is the scenario:
>>
>> 1. Incoming call
>> 2. Engage media proxy
>> 3. Try first GW (which is down)
>> 4. Failure route
>> 5. Try next GW
>> 6. Next GW sends Session progress & invite
>> 7. Media proxy module 'fixes' my SDP contact twice
>>
>> My SIP message end up with duplicated SDP contact info.  For example:c=IN IP4 33.66.22.1133.66.22.11
>>
>> If the first gateway works, this does not happen.  In fact it works
>> perfectly.  But I guess engage_media_proxy or the dialog module is having
>> an issue with a failure scenario?
>>
>> My failure route is pretty simple:
>>
>> failure_route[4] {
>>         xlog("L_INFO", "Failure Route: $rm,  $fu,  $ru\n");
>>
>>         if (use_next_gw()) {
>>                 xlog("L_INFO", "Trying next gateway" );
>>                 t_relay();
>>                 exit;
>>         } else {
>>                 xlog( "L_INFO", "Exhausted gateway list" );
>>                 t_reply ("503", "Service not available");
>>                 exit;
>>         }
>> }
>>
>> Should I switch to use_media_proxy/end_media_session if I want to expect
>> failovers?  Or could I be doing something wrong?
>>
>> Thanks guys
>> Charles
>>
>
>
>
> Hi Charles,
>
> Are you using fix_nated_sdp anywhere in your scripts or using anything
> else that modifies the SDP?
>
> Brian
>
>
>
>>
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>>
>
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