Network Settings fails on VirtualBox

[yahd]

How to reproduce:

1. Set VirtualBox Network Card to NAT mode
2. In Haiku execute Preferences-Network Preferences
3. Error message is shown

The application: /boot/system/preferences/Network has encountered an error <...>

Additional info:

[tcsetpgrp failed in terminal_inferior: Invalid Argument]
[Switching to team   /boot/system/preferences/Network  (563) thread Network(563)]
0x00209022 in EthernetSettingsView::_ShowConfiguration()

[xray7224]

I can confirm the same bug with the hrev39962 nighly build. Go to open network settings and it crashes before the window appears.

[yahd]

Forgot to mention, I has ​r39964 nighly build.

[diver]

I can reproduce it in VirtualBox 3.0.12 when I disable network adapter or if I switch to an unsupported one (e.g. PCnet based). When network card is detected Network preflet doesn't crash. So it seems that absence of NIC is not handled properly.

Thread 224 caused an exception: Segment violation
[...]
[Switching to team /boot/system/preferences/Network (224) thread Network (224)]
0x00209022 in EthernetSettingsView::_ShowConfiguration ()
(gdb) bt
#0  0x00209022 in EthernetSettingsView::_ShowConfiguration ()
#1  0x00209900 in EthernetSettingsView::AttachedToWindow ()
#2  0x0038b8aa in BView::_Attach () from /boot/system/lib/libbe.so
#3  0x003929aa in BView::_AddChild () from /boot/system/lib/libbe.so
#4  0x0032784e in BLayout::AddItem () from /boot/system/lib/libbe.so
#5  0x0032179f in BGroupLayout::AddItem () from /boot/system/lib/libbe.so
#6  0x003279e3 in BLayout::AddView () from /boot/system/lib/libbe.so
#7  0x003217e9 in BGroupLayout::AddView () from /boot/system/lib/libbe.so
#8  0x00326ad8 in BLayout::AddView () from /boot/system/lib/libbe.so
#9  0x0032180c in BGroupLayout::AddView () from /boot/system/lib/libbe.so
#10 0x00207edc in NetworkWindow::NetworkWindow ()
#11 0x00207c45 in NetworkApp::ReadyToRun ()
#12 0x002d08f9 in BApplication::DispatchMessage ()
   from /boot/system/lib/libbe.so
#13 0x002db2c4 in BLooper::task_looper () from /boot/system/lib/libbe.so
#14 0x002d0eb4 in BApplication::Run () from /boot/system/lib/libbe.so
#15 0x00207d81 in main ()
(gdb)

BTW: Several network drivers somehow appeared in Preferences -> Network component in Trac.

[jscipione]

Checks to see if your first adapter exists before trying to load it, fixes crash, window opens with nothing filled in

[jscipione]

Screen shot of the network preferences window after applying my patch

[kallisti5]

Duplicate #7492 closed.

[kallisti5]

Committed in hrev41412. While this isn't a final solution (funky NAT Ethernet device not working needs a separate ticket), it will at least prevent an unexpected crash.

[jscipione]

Put check for missing settings in _ShowConfiguration(). Check against NULL explicitly

[axeld]

Redone the fix a bit nicer in hrev42196.

[jscipione]

Screenshot of network preferences dialog with no adapter after Axel fixed it in hrev42196