Hello,

I have a question...
It is for my iPhone 4S (iOS 5.1.1 with JB)

For the interface pdp_ip1 (3G) you can set a proxy in the "preferences.plist".

This is working ell for the most apps, but when I take a look in the WhatsApp logs, I see, that it chooses the pdp_ip0 Interface.
WhatsApp try to connect, but the connection timed out, because it seems to use the wrong interface.

This is shown in the WhatsApp logs:

Code:

LL_N en0: flags=8863 < up ptp multicast > | Link addr=c4:2c:03:5e:32:78
LL_N en1: flags=8822 < broadcast simplex multicast > | Link addr=C6:2C:03:5E:32:79
LL_N lo0: flags=8049 < up loopback running multicast > | Link addr=none | IPv6 ip=0.0.0.0/netmask=0.0.0.0 | IPv4 ip=127.0.0.1/netmask=255.0.0.0 | IPv6 ip=0.0.0.0/netmask=0.0.0.0
LL_N pdp_ip0: flags=8011 < up ptp multicast > | Link addr=none | IPv4 ip=10.235.128.15/netmask=255.255.255.255
LL_N pdp_ip1: flags=8011 < up ptp multicast > | Link addr=none
LL_N pdp_ip2: flags=8011 < up ptp multicast > | Link addr=none
LL_N pdp_ip3: flags=8011 < up ptp multicast > | Link addr=none

[...]

2012-05-27 16:26:48.401 WhatsApp[534:3203] LL_N -[AsyncSocket tryConnect] [Line 1245] Binding the socket to WWAN.
2012-05-27 16:26:48.551 WhatsApp[534:3203] LL_N -[AsyncSocket bindSocketToWWAN:] [Line 1198] Network interface: pdp_ip0
2012-05-27 16:26:58.620 WhatsApp[534:3203] LL_N -[AsyncSocket doConnectTimeout:] [Line 1313] Attempt to connect to host timed out.
2012-05-27 16:26:58.653 WhatsApp[534:3203] LL_N -[AsyncSocket close] [Line 473] Close connection.
2012-05-27 16:26:58.858 WhatsApp[534:3203] LL_N -[AsyncSocket close] [Line 544] Retry connect.
2012-05-27 16:26:59.102 WhatsApp[534:3203] LL_N -[AsyncSocket tryConnect] [Line 1226] Connecting to 173.192.219.156 on port 443
2012-05-27 16:26:59.136 WhatsApp[534:3203] LL_N -[AsyncSocket tryConnect] [Line 1245] Binding the socket to WWAN.
2012-05-27 16:26:59.350 WhatsApp[534:3203] LL_N -[AsyncSocket bindSocketToWWAN:] [Line 1198] Network interface: pdp_ip0
2012-05-27 16:27:10.175 WhatsApp[534:3203] LL_N -[AsyncSocket doConnectTimeout:] [Line 1313] Attempt to connect to host timed out.
2012-05-27 16:27:10.222 WhatsApp[534:3203] LL_N -[AsyncSocket close] [Line 473] Close connection.
2012-05-27 16:27:11.416 WhatsApp[534:3203] LL_N -[AsyncSocket close] [Line 544] Retry connect.
2012-05-27 16:27:12.539 WhatsApp[534:3203] LL_N -[AsyncSocket tryConnect] [Line 1226] Connecting to 50.22.210.145 on port 5222
2012-05-27 16:27:12.594 WhatsApp[534:3203] LL_N -[AsyncSocket tryConnect] [Line 1245] Binding the socket to WWAN.
2012-05-27 16:27:13.665 WhatsApp[534:3203] LL_N -[AsyncSocket bindSocketToWWAN:] [Line 1198] Network interface: pdp_ip0
2012-05-27 16:27:24.893 WhatsApp[534:3203] LL_N -[AsyncSocket doConnectTimeout:] [Line 1313] Attempt to connect to host timed out.
2012-05-27 16:27:25.153 WhatsApp[534:3203] LL_N -[AsyncSocket close] [Line 473] Close connection.
2012-05-27 16:27:31.005 WhatsApp[534:3203] LL_N -[AsyncSocket close] [Line 544] Retry connect.

And so on...

Maybe some of you can help me with this issue?
I want to set a system-wide Proxy when I am connected to 3G (like Autoproxy does it on Android).
Maybe there is an app for that?

If I tap on "Systemstatus" in the WhatsApp settings, I see a Twitter page with WhatsApp infos.
If I remove the proxy from the "preferences.plist", that does not work.
Facebook, AppStore, Safari etc. is working with the Proxysettings but not WhatsApp.

It seems logical, that WhatsApp chooses pdp_ip0 if I check the infos given by "ifconfig -a" (on iPhone)

Code:

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet 127.0.0.1 netmask 0xff000000
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        ether c4:2c:03:5e:32:78
pdp_ip0: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 1450
        inet 10.235.123.20 --> 10.235.123.20 netmask 0xffffffff
pdp_ip1: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 1024
pdp_ip2: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 1024
pdp_ip3: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 1024
en1: flags=8822<BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500
        ether c6:2c:03:5e:32:79

I hope somebody can help me :-)

The problem is that WhatsApp might be unable to use a proxy. There are various options to force a proxy up on it. If the communication is http, just use charles (Charles Web Debugging Proxy • HTTP Monitor / HTTP Proxy / HTTPS & SSL Proxy / Reverse Proxy) and configure it as a http reverse proxy to the real host, than manipulate your router for wifi DNS settings to point to it. That canbe done with most DDWRT routers etc.. You will get the http communication. If it is not using charles at all, you need to find a way to force it to use wifi (Airplane mode?) and sniff the traffic with something like wireshark (Wireshark · Go deep.).

Hope that helps.