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wireless: Only join DFS channels in mesh mode if userspace flags support

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When joining a mesh network it is not guaranteed that userspace has a
daemon listening for radar events. This is however required for channels
requiring DFS. To flag that userspace will handle radar events, it needs
to set NL80211_ATTR_HANDLE_DFS.

This matches the current mechanism used for IBSS mode.

Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg
2017-05-16 11:23:11 +02:00
committed by Johannes Berg
parent 61b81b4010
commit d37d49c2f1
3 changed files with 15 additions and 0 deletions
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8
net/wireless/mesh.c
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@@ -174,6 +174,14 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
scan_width);
}
err = cfg80211_chandef_dfs_required(&rdev->wiphy,
&setup->chandef,
NL80211_IFTYPE_MESH_POINT);
if (err < 0)
return err;
if (err > 0 && !setup->userspace_handles_dfs)
return -EINVAL;
if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef,
NL80211_IFTYPE_MESH_POINT))
return -EINVAL;