[Freeswitch-users] DTLS ICE and WebRTC using Freeswitch 1.6

[Anthony Minessale]

Ice must negotiate, then dtls.  The ice is not encrypted.


On Sunday, May 31, 2015, Michael Jerris <mike at jerris.com> wrote:

> Typically this happens when the traffic isn't making it back to FreeSWITCH.
>
> On Sunday, May 31, 2015, Jon Lederman <jonlederman at gmail.com
> <javascript:_e(%7B%7D,'cvml','jonlederman at gmail.com');>> wrote:
>
>> Hi,
>>
>> We are having trouble getting WebRTC working with 1.6.  I have tracked
>> the problem down to the do_dtls function in switch_rtp.c (shown partially
>> below).  Two things we have noticed:
>>
>> 1) It appears that ice.ready and ice.ready are always 0.
>> 2) DTLS negotiation never completes the handshake.
>>
>> Does ice have to be operative in order for dtls negotiation to proceed or
>> the other way around?  What should I look for, which may prevent the ice
>> setup and/or dtls handshake.
>> We are running on google cloud.  Are there networking/NAT issues running
>> on cloud servers that might interfere with either ICE or DTLS?
>>
>> Thanks in advance.
>>
>> -Jon
>>
>>
>> static int do_dtls(switch_rtp_t *rtp_session, switch_dtls_t *dtls)
>> {
>>         int r = 0, ret = 0, len;
>>         switch_size_t bytes;
>>         unsigned char buf[4096] = "";
>>         int ready = rtp_session->ice.ice_user ? (rtp_session->ice.rready
>> && rtp_session->ice.ready) : 1;
>>
>>
>>
>>         if (!dtls->bytes && !ready) {
>>
>> //switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(rtp_session->session),
>> SWITCH_LOG_ALERT, "Ice not ready");
>>                 return 0;
>>         }
>>
>> …
>>
>>
>>
>>
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>
>

-- 
Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬

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