Attached is the test program. I compiled it within the click chroot
using the following command:
arm-linux-gnueabihf-g++ -ggdb -std=c++11 -fPIC -o net-test.arm net-
test.cpp `arm-linux-gnueabihf-pkg-config --cflags --libs Qt5Network`
When run with a URL as an argument, it will attempt to retrieve the
resource every 5 seconds. When in flight mode, I see the process
blocked in poll():
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}], 2, -1)
Where the two file descriptors are:
eventfd2(0, O_NONBLOCK|O_CLOEXEC) = 3
socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC, 0) = 7
connect(7, {sa_family=AF_LOCAL, sun_path="/var/run/dbus/system_bus_socket"},
33) = 0
(i.e. the second is a D-Bus connection to the system bus).
** Attachment added: "net-test.cpp"
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1470700/+attachment/4423164/+files/net-test.cpp
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https://bugs.launchpad.net/bugs/1470700
Title:
QNetworkAccessManager hangs when in flight mode
Status in qtbase-opensource-src package in Ubuntu:
New
Bug description:
When my phone is in flight mode, HTTP requests made using
QNetworkAccessManager seem to hang rather than erroring out
immediately.
From my tests, it looks like the HTTP request is blocked until the
flight mode is disabled and a network connection is reestablished.
This is contrary to the documentation, which states:
"""If the network is not accessible the network access manager will
not process any new network requests, all such requests will fail with
an error. Requests with URLs with the file:// scheme will still be
processed."""
http://doc.qt.io/qt-5/qnetworkaccessmanager.html#networkAccessible-
prop
By running strace on my test program, it doesn't even look like it
attempts to open a TCP connection when blocked in flight mode.
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