ieee80211_ie_rsn Struct Reference
[802.11 information elements]

802.11 Robust Security Network ("WPA") information element More...

#include <ieee80211.h>

Data Fields
u8	id
	Information element ID.
u8	len
	Information element length.
u16	version
	RSN information element version.
u32	group_cipher
	Cipher ID for the cipher used in multicast/broadcast frames.
u16	pairwise_count
	Number of unicast ciphers supported.
u32	pairwise_cipher [1]
	List of cipher IDs for supported unicast frame ciphers.
u16	akm_count
	Number of authentication types supported.
u32	akm_list [1]
	List of authentication type IDs for supported types.
u16	rsn_capab
	Security capabilities field (RSN only).
u16	pmkid_count
	Number of PMKIDs included (present only in association frames).
u8	pmkid_list [0]
	List of PMKIDs included, each a 16-byte SHA1 hash.

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Detailed Description

802.11 Robust Security Network ("WPA") information element

Showing once again a striking clarity of design, the IEEE folks put dynamically-sized data in the middle of this structure. As such, the below structure definition only works for IEs we create ourselves, which always have one pairwise cipher and one AKM; received IEs should be parsed piecemeal.

Also inspired was IEEE's choice of 16-bit fields to count the number of 4-byte elements in a structure with a maximum length of 255 bytes.

Many fields reference a cipher or authentication-type ID; this is a three-byte OUI followed by one byte identifying the cipher with respect to that OUI. For all standard ciphers the OUI is 00:0F:AC, except in old-style WPA IEs encapsulated in vendor-specific IEs, where it's 00:50:F2.

Definition at line 797 of file ieee80211.h.

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Field Documentation

u8 ieee80211_ie_rsn::id

Information element ID.

Definition at line 799 of file ieee80211.h.

u8 ieee80211_ie_rsn::len

Information element length.

Definition at line 802 of file ieee80211.h.

u16 ieee80211_ie_rsn::version

RSN information element version.

Definition at line 805 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u32 ieee80211_ie_rsn::group_cipher

Cipher ID for the cipher used in multicast/broadcast frames.

Definition at line 808 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u16 ieee80211_ie_rsn::pairwise_count

Number of unicast ciphers supported.

Definition at line 811 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u32 ieee80211_ie_rsn::pairwise_cipher[1]

List of cipher IDs for supported unicast frame ciphers.

Definition at line 814 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u16 ieee80211_ie_rsn::akm_count

Number of authentication types supported.

Definition at line 817 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u32 ieee80211_ie_rsn::akm_list[1]

List of authentication type IDs for supported types.

Definition at line 820 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u16 ieee80211_ie_rsn::rsn_capab

Security capabilities field (RSN only).

Definition at line 823 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u16 ieee80211_ie_rsn::pmkid_count

Number of PMKIDs included (present only in association frames).

Definition at line 826 of file ieee80211.h.

Referenced by wpa_make_rsn_ie().

u8 ieee80211_ie_rsn::pmkid_list[0]

List of PMKIDs included, each a 16-byte SHA1 hash.

Definition at line 829 of file ieee80211.h.

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The documentation for this struct was generated from the following file:

• include/gpxe/ieee80211.h