[Freeswitch-users] bidirectional SRTP
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
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mrene at avgs.ca
On 14-Dec-09, at 11:00 AM, Helmut Kuper wrote:
> 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:
> 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?
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