Siphon dial out via VPN

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What steps will reproduce the problem?
1. Activate VPN connection on iPhone (asterisk server is only reachable 
via pptp vpn)
2. Open Siphon and attempt to dial
3. Get pop-up asking to dial with cellular

4. Activate Setting for siphon over 3G/Edge
5. Open Siphone and attempt to dial
6. Call is placed as expected.

What is the expected output? What do you see instead?

Would rather not have to enable the 3G/Edge option in siphone when wanting 
to dial out via vpn over wifi. Does enabling the 3G/Edge mode reduce the 
bandwith usage? Voice calls are sounding a little robotic.

What version of the product are you using? On what operating system?

siphone 20090104-1
iphone 2.2

Please provide any additional information below.

Original issue reported on code.google.com by jeremy.l...@gmail.com on 12 Jan 2009 at 11:03

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Did you ever solve the problem? Thanks Regards,

Original comment by camilo...@gmail.com on 27 Jan 2009 at 4:01

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I don't understand, the behavior is normal.
I defined this behavior because everybody don't want or can't use VoIP on 3G.

Otherwise, I don't know why Siphon doesn't use VPN. Siphon uses Apple's example:
reachibility. Maybe the return value by this code for VPN is specific.

Could you help me to test this feature ?
You can contact me by mail.

Original comment by samuelv0...@gmail.com on 27 Jan 2009 at 9:02

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I'm now back home and don't have the need for the VPN since asterisk is on 
local 
lan. Not sure when I'll have the opportunity to test this again.

Original comment by jeremy.l...@gmail.com on 27 Jan 2009 at 2:01

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If needed, I could help you test the VPN connectivity-issue. My companys 
sip-server
is reachable via vpn.

Original comment by suq...@gmail.com on 28 Jan 2009 at 2:34

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Issue 140 has been merged into this issue.

Original comment by samuelv0...@gmail.com on 1 Feb 2009 at 1:46

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I've had the problem, that using VPN and WiFi i can't connect to my SIP Server, 
since Siphon tries to use the 
public IP to communicate with the SIP server and not the VPN IP.

Any solution to that yet?
I can help test the VPN connection and would be glad to do so!

Original comment by lukas.pi...@gmail.com on 1 Mar 2009 at 5:28

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I have seen that siphone sends the 3G's IP instead of the local IP provided for 
the 
VPN server. It sends the register to my server but it sends the wrong IP, so 
when my 
IP-Pbx is trying to reach it, this is nos posible because the registration IP 
it's 
not and 192.X.X.X ip what siphon sent at the register message.

Any one can help me. Regards.

Original comment by drolda...@gmail.com on 3 Mar 2009 at 5:28

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This lines of code in call.m (Line 252-253) seem to establish the connection:

status = pjsua_transport_create(PJSIP_TRANSPORT_UDP,
          &app_config->udp_cfg, NULL/*&transport_id*/);

Looking into the pjsua_transport_create function, i think, the public ip should 
be passed to it, instead of NULL,
else the pjsua_transport_create takes over to lookup the public ip address, 
which then results in being either 
the 3G or WiFi Gateway, but not the VPN IP.

Maybe this could be solved, if the code checked for the connection being used 
by the iPhone (3G/WiFi/VPN) 
and passes the ip of the matching connection to the pjsua_transport_create 
function.

I'd love to be included in the beta testings to test upcoming Siphon versions 
with my Offices VPN connection

Original comment by lukas.pi...@gmail.com on 8 Mar 2009 at 10:18

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I would also be willing to help test any potential fixes.  I'm running an 
asterisk server that I have to open an L2TP 
VPN connection to in order to use.  Siphon seems to be passing my WiFi IP 
instead of the VPN IP.  Here's a copy 
of my log file from opening Siphon.  After it tries to connect the message 
displayed in the app is "Service 
Unavailable"

Original comment by masicign...@gmail.com on 26 Mar 2009 at 7:43

Attachments:

• log.txt

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Do you have any solution for using it with a VPN and sending the right VNP IP 
address??

Original comment by drolda...@gmail.com on 8 Apr 2009 at 7:19

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Do you have the possibility to get trace from iphone (log) and on server ?
If could you post here or send me by mail.

Like that we can see if the problem is caused by server not receiving the 
REGISTER
request or because the REGISTER response is not received by iPhone.

Original comment by samuelv0...@gmail.com on 27 Apr 2009 at 8:20

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Any status updates on this? I too am having the same problem. If I'm connected 
via
wifi over the vpn, I see in the logs that it is using my Wifi address instead 
of the
VPN. As Lukas was saying it looks like from the code that pjsip is what is 
handling
what IP it should use. Apparently it is picking the wrong one. However, I think 
Lukas
is wrong about the NULL thing (unless we are looking at different version of 
pjsip).
It looks like it can be passed in through the app_config->public_addr which is a
string. According to pjsua.h..

    /**
     * Optional address to advertise as the address of this transport.
     * Application can specify any address or hostname for this field,
     * for example it can point to one of the interface address in the
     * system, or it can point to the public address of a NAT router
     * where port mappings have been configured for the application.
     *
     * Note: this option can be used for both UDP and TCP as well!
     */
     pj_str_t       public_addr;

Original comment by danielbl...@gmail.com on 14 Jul 2009 at 4:07

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look issue 225 comment 3 ;-)

Original comment by samuelv0...@gmail.com on 15 Jul 2009 at 12:59

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I am having this same issue, I am willing to do some testing to assist the 
resolution
of this problem.

Thanks for your work! Hopefully we can get this working!

Original comment by jfranc...@gmail.com on 4 Aug 2009 at 4:15