[Freeswitch-users] FreeSWITCH offering SRTP on Re-INVITE
mike at jerris.com
Fri May 18 14:41:06 UTC 2018
After review of the sip trace, I’d report that one to the zoiper guys. There is no reason they should reject the call in that case.
> On May 17, 2018, at 4:48 PM, Andrew Cassidy <andrew at cassidywebservices.co.uk> wrote:
> Good afternoon All,
> I have experienced the following issue with Zoiper specifically (I have a support ticket open with them currently) and was wondering if it's something that could/should be fixed FreeSWITCH side.
> If rtp_secure_media is set to optional, and SRTP is disabled on Zoiper, when FreeSWITCH sends the Re-INVITE, it sends crypto lines. Zoiper then replies with a 514 Unsupported Media Type and the timer refresh fails, causing Zoiper to hang up the call.
> My current feeling is that as Zoiper ignored the crypto on the initial INVITE it should be them that then handles the Re-INVITE consistently by also ignoring the crypto lines but I'm not familiar enough with the RFCs to make a judgement.
> The workaround is to either enable SRTP in Zoiper or don't set rtp_secure_media to optional when Zoiper is in use.
> Kind regards,
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