How to handle multiple SSIDs with the same BSS

Marcel Holtmann marcel at holtmann.org
Wed Dec 23 07:48:11 EST 2009


Hi guys,

so we have some funny access points, that provide two SSIDs from within
the same BSS. Something like this:

BSS 00:1a:a1:53:50:a0 (on wlan0)
	TSF: 9248013477550 usec (107d, 00:53:33)
	freq: 2462
	beacon interval: 100
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -72.00 dBm
	SSID: Private
	Supported rates: 6.0* 9.0 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)

BSS 00:1a:a1:53:50:a0 (on wlan0)
	TSF: 9248093259783 usec (107d, 00:54:53)
	freq: 2462
	beacon interval: 100
	capability: ESS ShortPreamble ShortSlotTime (0x0421)
	signal: -74.00 dBm
	SSID: Public
	Supported rates: 6.0* 9.0 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11

When using the wpa_supplicant D-Bus interface, every BSS can only be
listed once and so we either see "Private" or "Public", but never
actually both of them. How should this be handled.

Also looking into the register_bss callbacks, you only get the BSS
address and not the set of IE.

Regards

Marcel




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