[Mesh] [Linphone-users] Linphone-users Digest, Vol 195, Issue 6

[Stuart D. Gathman]

Linphone Peer to Peer Tips

Here is what I have to do for peer to peer calls (the kind I an my 
family and friends use the most).   linphone-3.6.1

Even with direct internet connection, you must set firewall_policy=1 
(Behind NAT, specify public ip) in order to make linphone use the 
correct ip.  Otherwise, it randomly picks an ip, discarding those 
classified as "private" - i.e. it refuses to use a VPN.

For direct peer to peer calls, use a sip address like this:

  sip:username@[fc30:a40a:99bf:b885:44e4:7a3c:1577:9377]

Your default identity (used for receiving a peer to peer call) should 
be in the same format.

You are not expected to type these - use the handy address book.

If you need to also use linphone with a centralized SIP provider (e.g. 
to call an ancient POTS style address - i.e. telephone number), you 
must use an IPv6 VPN, and set firewall_policy=2 (behind NAT, use STUN 
server) *after* setting the desired IPv6 public ip with 
firewall_policy=1.  A STUN server typically only responds on IPv4, so 
while in IPv6 mode, linphone will fallback to firewall_policy=1 (none 
of this is documented).  With this setup, you just need to switch to 
IPv4 to use the centralized SIP provider, and IPv6 to make and receive 
Peer to Peer calls.

This all seems very fragile.  I hope that future versions give due 
consideration to peer to peer usage.  In particular, a documented way 
to specify the desired "public" ip (even if it is a private VPN or 
local LAN ip - another common peer to peer use is as an office 
intercom).


On Sat, Feb 16, 2019 at 12:49 PM, Russell Treleaven 
<rtreleaven at bunnykick.ca> wrote:
> 
> I for one appreciate your constructive feedback.
> 
> What version?
> What platform?
> If only one bug could be addressed(and I am not promising anything) 
> which one would you recommend?
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