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WebRTC no DTLS Handshake from Firefox 47 or 48

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chrischarles2002
 
Posts: 1
Joined: August 18th, 2016, 12:17 pm

Post Posted August 18th, 2016, 12:52 pm

We are using WebRTC via Doubango’s "webrtc2sip" with Asterisk for 2-way audio within browsers (no video necessary).

We are very successful using this very same architecture within Chrome, Opera and Safari.

However, when using Firefox 4x + (specifically testing with Firefox 47.x and 48.x), we are not able to establish consistent bi-direction audio connectivity.
By consistent, this means that we DO establish audio, one out of every 30 to 50 attempts.

By doing SIP traces and TCP / UDP dumps, we have been able to determine that the reason for this inconsistency (really it's more like non-functioning), is because Firefox does not send out the DTLS "Client Hello".

This messaging is consistent in other browsers. As mentioned before, only with Firefox does it seem to basically almost never work.

I guess my question would be: >>> Is if there is a way to force Firefox to send that DTLS Handshake, "Client Hello", so that audio can be established in a more consistent fashion?


Thanks to all in advance.
_____________________

(Below is what a successful audio stream connection looks like in Firefox [or any other browser] compared to an unsuccessful attempt):


SUCCESSFUL AUDIO CONNECTIVITY ESTABLISHED:
Code: Select all
No.   Time   Source   Destination   Protocol   Length   Info
4   0.029545   1.1.1.1   2.2.2.2   STUN   142   Binding Request user: aAD4bmYKmi0uDoW:85353940
12   0.085025   2.2.2.2   1.1.1.1   STUN   154   Binding Success Response MAPPED-ADDRESS: 1.1.1.1:61209 XOR-MAPPED-ADDRESS: 1.1.1.1:61209
13   0.085142   2.2.2.2   1.1.1.1   STUN   178   Binding Request user: 85353940:aAD4bmYKmi0uDoW
18   0.170843   1.1.1.1   2.2.2.2   STUN   142   Binding Request user: aAD4bmYKmi0uDoW:85353940
19   0.170997   2.2.2.2   1.1.1.1   STUN   154   Binding Success Response MAPPED-ADDRESS: 1.1.1.1:61209 XOR-MAPPED-ADDRESS: 1.1.1.1:61209
20   0.171064   2.2.2.2   1.1.1.1   STUN   178   Binding Request user: 85353940:aAD4bmYKmi0uDoW
21   0.199192   1.1.1.1   2.2.2.2   STUN   142   Binding Request user: aAD4bmYKmi0uDoW:85353940
22   0.199307   1.1.1.1   2.2.2.2   STUN   106   Binding Success Response XOR-MAPPED-ADDRESS: 3.3.3.3:56390
23   0.199401   2.2.2.2   1.1.1.1   STUN   154   Binding Success Response MAPPED-ADDRESS: 1.1.1.1:61209 XOR-MAPPED-ADDRESS: 1.1.1.1:61209
24   0.19945   2.2.2.2   1.1.1.1   STUN   178   Binding Request user: 85353940:aAD4bmYKmi0uDoW
25   0.200302   2.2.2.2   1.1.1.1   UDP   114   Source port: 56390  Destination port: 61209
27   0.280766   1.1.1.1   2.2.2.2   STUN   106   Binding Success Response XOR-MAPPED-ADDRESS: 3.3.3.3:56390
29   0.28145   1.1.1.1   2.2.2.2   STUN   142   Binding Request user: aAD4bmYKmi0uDoW:85353940
30   0.281636   2.2.2.2   1.1.1.1   STUN   154   Binding Success Response MAPPED-ADDRESS: 1.1.1.1:61209 XOR-MAPPED-ADDRESS: 1.1.1.1:61209
31   0.281673   1.1.1.1   2.2.2.2   STUN   106   Binding Success Response XOR-MAPPED-ADDRESS: 3.3.3.3:56390
32   0.281684   2.2.2.2   1.1.1.1   STUN   182   Binding Request user: 85353940:aAD4bmYKmi0uDoW
33   0.295628   1.1.1.1   2.2.2.2   STUN   106   Binding Success Response XOR-MAPPED-ADDRESS: 3.3.3.3:56390
34   0.296057   1.1.1.1   2.2.2.2   DTLSv1.2   215   Client Hello
35   0.302753   2.2.2.2   1.1.1.1   DTLSv1.0   161   Server Hello
36   0.302793   2.2.2.2   1.1.1.1   DTLSv1.0   795   Certificate (Fragment)
37   0.302854   2.2.2.2   1.1.1.1   DTLSv1.0   914   Certificate (Fragment)
38   0.302889   2.2.2.2   1.1.1.1   DTLSv1.0   914   Certificate (Fragment)
39   0.30292   2.2.2.2   1.1.1.1   DTLSv1.0   116   Certificate (Fragment)
40   0.30295   2.2.2.2   1.1.1.1   DTLSv1.0   79   Certificate (Reassembled)
41   0.302981   2.2.2.2   1.1.1.1   DTLSv1.0   394   Server Key Exchange
42   0.303011   2.2.2.2   1.1.1.1   DTLSv1.0   73   Certificate Request
43   0.303037   2.2.2.2   1.1.1.1   DTLSv1.0   67   Server Hello Done
44   0.336477   1.1.1.1   2.2.2.2   DTLSv1.0   619   Certificate, Client Key Exchange, Certificate Verify, Change Cipher Spec, Encrypted Handshake Message
45   0.407568   2.2.2.2   1.1.1.1   DTLSv1.0   56   Change Cipher Spec
46   0.40762   2.2.2.2   1.1.1.1   DTLSv1.0   119   Encrypted Handshake Message
47   0.411422   2.2.2.2   1.1.1.1   UDP   224   Source port: 56390  Destination port: 61209


UNSUCCESSFUL AUDIO CONNECTIVITY:
Code: Select all
No.   Time   Source   Destination   Protocol   Length   Info
35   1.677266   1.1.1.1   2.2.2.2   STUN   142   Binding Request user: LLz8JvlVhEuVgcc:bddf6fa3
41   1.701604   2.2.2.2   1.1.1.1   STUN   154   Binding Success Response MAPPED-ADDRESS: 1.1.1.1:52052 XOR-MAPPED-ADDRESS: 1.1.1.1:52052
42   1.7017   2.2.2.2   1.1.1.1   STUN   178   Binding Request user: bddf6fa3:LLz8JvlVhEuVgcc
44   1.714811   1.1.1.1   2.2.2.2   STUN   142   Binding Request user: LLz8JvlVhEuVgcc:bddf6fa3
45   1.714932   1.1.1.1   2.2.2.2   STUN   106   Binding Success Response XOR-MAPPED-ADDRESS: 3.3.3.3:43790
46   1.714973   2.2.2.2   1.1.1.1   STUN   154   Binding Success Response MAPPED-ADDRESS: 1.1.1.1:52052 XOR-MAPPED-ADDRESS: 1.1.1.1:52052
47   1.715021   2.2.2.2   1.1.1.1   STUN   178   Binding Request user: bddf6fa3:LLz8JvlVhEuVgcc
48   1.716517   2.2.2.2   1.1.1.1   UDP   114   Source port: 43790  Destination port: 52052
50   1.727207   1.1.1.1   2.2.2.2   STUN   106   Binding Success Response XOR-MAPPED-ADDRESS: 3.3.3.3:43790
52   4.040547   2.2.2.2   1.1.1.1   UDP   134   Source port: 43790  Destination port: 52052
55   4.047658   2.2.2.2   1.1.1.1   UDP   50   Source port: 43790  Destination port: 52052

DanRaisch
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Post Posted August 18th, 2016, 1:33 pm

Moving to Web Development.

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