[Freeswitch-users] bidirectional SRTP

Mathieu Rene mrene_lists at avgs.ca
Mon Dec 14 08:05:47 PST 2009

Both the INVITE and the 200 OK have an a=crypto line. You need to know  
that only the rtp payload is encrypted, it is normal that you see the  
headers as-is.

Mathieu Rene
Avant-Garde Solutions Inc
Office: + 1 (514) 664-1044 x100
Cell: +1 (514) 664-1044 x200
mrene at avgs.ca

On 14-Dec-09, at 11:00 AM, Helmut Kuper wrote:

> Hello,
> today I found that my SRTP calls are only SRTP in one way (from snom  
> to FS). The other direction is still RTP (at least if I believe  
> wireshark). How can I get both directions using SRTP?
> I do a simple call to an announcement in FS.
> My SIP-profile has:
> <param name="inbound-late-negotiation" value="true"/>
> I followed the document of FS Wiki:
> http://wiki.freeswitch.org/wiki/Secure_RTP
> But it seems there is no ch_var like sip_has_crypto.
> Is there a way to have both directions/streams per leg using SRTP?
> Please find attached the pcap trace of my snom phone.
> There you can see that snom offers crypto to FS. FS sends an OK with  
> SRTP and RTP. When you look into the RTP data you see SRTP from snom  
> to FS and RTP from FS to snom.
> Any hints?
> regards
> Helmut
> <trace.pcap>_______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org

More information about the FreeSWITCH-users mailing list