Comment 0 for bug 1454625

Cannot send MMS messages with combined contexts in case the WiFi is enabled, for some operators. Combined contexts are able to handle internet data and MMS data. For the operator for which I've seen the bug, the data is:

$ /usr/share/ofono/scripts/list-contexts
[ /ril_0 ]
    [ /ril_0/context1 ]
        Password =
        MessageCenter = http://www.pepephone.com
        Name = MMS Pepephone
        Username =
        Protocol = ip
        Preferred = 0
        IPv6.Settings = { }
        Settings = { }
        MessageProxy = 10.138.255.43:8080
        Type = internet
        AccessPointName = gprs.pepephone.com
        Active = 0

Sending an MMS with cellular data and WiFi enabled fails for this operator when using a combined context. Disabling WiFi I was able to send the MMS.

The error I see in ~/.cache/upstart/dbus.log is:

E0513 09:55:03.254148 4565 file_upload.cpp:345] Upload ID{ d0e5da6eb7664d908ab49b810ff55e01 } http://www.pepephone.com ERROR::Network error UnknownNetworkError: an unknown network-related error was detected

The interface that were up when the failure happened were:

$ ifconfig
rmnet_usb0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:10.60.155.62 Mask:255.255.255.0
          inet6 addr: fe80::8159:5668:797f:eed7/64 Scope:Link
          UP RUNNING MTU:1500 Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:829 (829.0 B) TX bytes:1052 (1.0 KB)

wlan0 Link encap:Ethernet HWaddr 10:68:3f:7a:92:d5
          inet addr:192.168.1.40 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::1268:3fff:fe7a:92d5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:355 errors:0 dropped:0 overruns:0 frame:0
          TX packets:186 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:51241 (51.2 KB) TX bytes:18951 (18.9 KB)

See attached the tcpdump of the packets sent when this happened. Some quick analysis shows that the uploader is sending through the WiFi (192.168.1.40) instead of using 10.60.155.62, so it is clearly a routing problem. The MMS proxy has private address 10.138.255.43 so it is not reachable from WiFi.

Found in mako vivid-proposed image #195.