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[Bug 1532431] [NEW] NetworkManager interferes with unmanaged 802.11 monitor mode interfaces

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Roger James <1532431@xxxxxxxxxxxxxxxxxx>
Date: Sat, 09 Jan 2016 12:18:37 -0000
Reply-to: Bug 1532431 <1532431@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

If a virtual 802.11 interface of type monitor is created on a 802.11
physical interface that already has a virtual interface of type managed
created on it, then the managed interface is deleted. NetworkManager
sets the type of the monitor interface to managed. This can be
illustrated by the following commands. All the interface names have been
listed in /etc/network/interfaces as follows so NetworkManager should
not be managing them in any way.

# Disable network manager on interface names I want to use for monitoring
# related purposes
iface eth1 inet manual
iface BigTenda inet manual
iface LittleBelkin inet manual
iface LittleTenda inet manual
iface Sinmax inet manual
iface mon0 inet manual
iface phy0.mon manual
iface phy1.mon manual
iface phy2.mon manual
iface phy3.mon manual
iface phy4.mon manual
iface phy5.mon manual
iface phy6.mon manual
iface phy7.mon manual
iface phy8.mon manual
iface phy9.mon manual

root@dragon:/home/roger# systemctl start NetworkManager
root@dragon:/home/roger# iw dev
phy#3
	Interface Sinmax
		ifindex 11
		wdev 0x300000001
		addr 00:0f:11:92:06:b2
		type managed
root@dragon:/home/roger# iw phy phy3 interface add phy2.mon type monitor flags otherbss
root@dragon:/home/roger# iw dev
phy#3
	Interface phy2.mon
		ifindex 12
		wdev 0x300000002
		addr 00:0f:11:92:06:b2
		type monitor
	Interface Sinmax
		ifindex 11
		wdev 0x300000001
		addr 00:0f:11:92:06:b2
		type managed
root@dragon:/home/roger# iw dev Sinmax del
root@dragon:/home/roger# iw dev
phy#3
	Interface phy2.mon
		ifindex 12
		wdev 0x300000002
		addr 00:0f:11:92:06:b2
		type managed
root@dragon:/home/roger# systemctl stop NetworkManager
root@dragon:/home/roger# iw dev
phy#3
	Interface phy2.mon
		ifindex 12
		wdev 0x300000002
		addr 00:0f:11:92:06:b2
		type managed
root@dragon:/home/roger# # Unplug the netwaork adapter for a few seconds
root@dragon:/home/roger# iw dev
phy#4
	Interface Sinmax
		ifindex 13
		wdev 0x400000001
		addr 00:0f:11:92:06:b2
		type managed
root@dragon:/home/roger# iw phy phy4 interface add phy2.mon type monitor flags otherbss
root@dragon:/home/roger# iw dev
phy#4
	Interface phy2.mon
		ifindex 14
		wdev 0x400000002
		addr 00:0f:11:92:06:b2
		type monitor
	Interface Sinmax
		ifindex 13
		wdev 0x400000001
		addr 00:0f:11:92:06:b2
		type managed
root@dragon:/home/roger# iw dev Sinmax del
root@dragon:/home/roger# iw dev
phy#4
	Interface phy2.mon
		ifindex 14
		wdev 0x400000002
		addr 00:0f:11:92:06:b2
		type monitor

This stops any running or future network traces on this interface
working.

This is another example of network manager interfering with interfaces
it is not supposed to be managing. See bug #1314848 which is still
unresolved.

The above test was carried out on Ubuntu 15.10

network-manager:
  Installed: 1.0.4-0ubuntu5.2
  Candidate: 1.0.4-0ubuntu5.2
  Version table:
 *** 1.0.4-0ubuntu5.2 0
        500 http://gb.archive.ubuntu.com/ubuntu/ wily-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.0.4-0ubuntu5 0
        500 http://gb.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: iw mac80211 monitor networkmanager wifi

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1532431

Title:
  NetworkManager interferes with unmanaged 802.11 monitor mode
  interfaces

Status in network-manager package in Ubuntu:
  New

Bug description:
  If a virtual 802.11 interface of type monitor is created on a 802.11
  physical interface that already has a virtual interface of type
  managed created on it, then the managed interface is deleted.
  NetworkManager sets the type of the monitor interface to managed. This
  can be illustrated by the following commands. All the interface names
  have been listed in /etc/network/interfaces as follows so
  NetworkManager should not be managing them in any way.

  # Disable network manager on interface names I want to use for monitoring
  # related purposes
  iface eth1 inet manual
  iface BigTenda inet manual
  iface LittleBelkin inet manual
  iface LittleTenda inet manual
  iface Sinmax inet manual
  iface mon0 inet manual
  iface phy0.mon manual
  iface phy1.mon manual
  iface phy2.mon manual
  iface phy3.mon manual
  iface phy4.mon manual
  iface phy5.mon manual
  iface phy6.mon manual
  iface phy7.mon manual
  iface phy8.mon manual
  iface phy9.mon manual

  root@dragon:/home/roger# systemctl start NetworkManager
  root@dragon:/home/roger# iw dev
  phy#3
  	Interface Sinmax
  		ifindex 11
  		wdev 0x300000001
  		addr 00:0f:11:92:06:b2
  		type managed
  root@dragon:/home/roger# iw phy phy3 interface add phy2.mon type monitor flags otherbss
  root@dragon:/home/roger# iw dev
  phy#3
  	Interface phy2.mon
  		ifindex 12
  		wdev 0x300000002
  		addr 00:0f:11:92:06:b2
  		type monitor
  	Interface Sinmax
  		ifindex 11
  		wdev 0x300000001
  		addr 00:0f:11:92:06:b2
  		type managed
  root@dragon:/home/roger# iw dev Sinmax del
  root@dragon:/home/roger# iw dev
  phy#3
  	Interface phy2.mon
  		ifindex 12
  		wdev 0x300000002
  		addr 00:0f:11:92:06:b2
  		type managed
  root@dragon:/home/roger# systemctl stop NetworkManager
  root@dragon:/home/roger# iw dev
  phy#3
  	Interface phy2.mon
  		ifindex 12
  		wdev 0x300000002
  		addr 00:0f:11:92:06:b2
  		type managed
  root@dragon:/home/roger# # Unplug the netwaork adapter for a few seconds
  root@dragon:/home/roger# iw dev
  phy#4
  	Interface Sinmax
  		ifindex 13
  		wdev 0x400000001
  		addr 00:0f:11:92:06:b2
  		type managed
  root@dragon:/home/roger# iw phy phy4 interface add phy2.mon type monitor flags otherbss
  root@dragon:/home/roger# iw dev
  phy#4
  	Interface phy2.mon
  		ifindex 14
  		wdev 0x400000002
  		addr 00:0f:11:92:06:b2
  		type monitor
  	Interface Sinmax
  		ifindex 13
  		wdev 0x400000001
  		addr 00:0f:11:92:06:b2
  		type managed
  root@dragon:/home/roger# iw dev Sinmax del
  root@dragon:/home/roger# iw dev
  phy#4
  	Interface phy2.mon
  		ifindex 14
  		wdev 0x400000002
  		addr 00:0f:11:92:06:b2
  		type monitor

  This stops any running or future network traces on this interface
  working.

  This is another example of network manager interfering with interfaces
  it is not supposed to be managing. See bug #1314848 which is still
  unresolved.

  The above test was carried out on Ubuntu 15.10

  network-manager:
    Installed: 1.0.4-0ubuntu5.2
    Candidate: 1.0.4-0ubuntu5.2
    Version table:
   *** 1.0.4-0ubuntu5.2 0
          500 http://gb.archive.ubuntu.com/ubuntu/ wily-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.0.4-0ubuntu5 0
          500 http://gb.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages

To manage notifications about this bug go to:
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Follow ups

[Bug 1532431] Re: NetworkManager interferes with unmanaged 802.11 monitor mode interfaces
From: Roger James, 2016-01-10