Differences

This shows you the differences between two versions of the page.

--- airmon-ng [2019/08/17 04:01]
mister_x [Error "add_iface: Permission denied"] SVN doesn't exist anymore
+++ airmon-ng [2019/08/18 01:15] (current)
mister_x brcmf_cfg80211_add_iface: iface validation failed: err=-95
@@ Line 456: / Line 456: @@
 See also http://ubuntuforums.org/showthread.php?t=1311886
+==== ERROR adding monitor mode interface: command failed: Operation not supported (-95) ====
+It is known to happen on the Raspberry Pi, when using [[airmon-ng]]. When that happens, the following can be seen in dmesg:
+  brcmfmac: brcmf_vif_add_validate: Attempt to add a MONITOR interface...
+  brcmfmac: brcmf_vif_add_validate: ... there is already a monitor interface, returning EOPNOTSUPP
+  brcmfmac: brcmf_cfg80211_add_iface: iface validation failed: err=-95
+There may be instances of the following in dmesg as well prior to the above output:
+  brcmfmac: brcmf_vif_add_validate: Attempt to add a MONITOR interface...
+  brcmfmac: brcmf_mon_add_vif: brcmf_mon_add_vif called
+  brcmfmac: brcmf_mon_add_vif: Adding vif "wlan0mon"
+  brcmfmac: brcmf_cfg80211_get_channel: chanspec failed (-52)
+Even though dmesg says the interface is already in monitor mode and "iw dev wlan0 info" confirms it is, [[airodump-ng]] will fail and report the interface data linktype is Ethernet. This is a bug in the driver and/or firmware, and the workaround is to reboot the system or to reload the driver:
+  rmmod brcmfmac
+  modprobe brcmfmac

Aircrack-ng