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HS 2.0: Add mechanism for disabling DGAF

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disable_dgaf=1 in hostapd.conf can now be used to disable downstream
group-addressed forwarding (DGAF). In this configuration, a unique
GTK (and IGTK) is provided to each STA in the BSS to make sure the
keys do not match and no STA can forge group-addressed frames.

An additional mechanism in the AP needs to be provided to handle some
group-addressed frames, e.g., by converting DHCP packets to unicast
IEEE 802.11 frames regardless of their destination IP address and by
providing Proxy ARP functionality.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2011-10-18 12:38:32 +03:00 • committed by Jouni Malinen
parent 19a8ad9944
commit 8342185012
9 changed files with 55 additions and 4 deletions
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3
src/ap/hs20.c
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@ -25,6 +25,7 @@ u8 * hostapd_eid_hs20_indication(struct hostapd_data *hapd, u8 *eid)
WPA_PUT_BE24(eid, OUI_WFA);
eid += 3;
*eid++ = HS20_INDICATION_OUI_TYPE;
*eid++ = 0x00; /* Hotspot Configuration: DGAF Enabled */
/* Hotspot Configuration: DGAF Enabled */
*eid++ = hapd->conf->disable_dgaf ? 0x01 : 0x00;
return eid;
}