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BSS: Add wpa_bss_get_ie_beacon()

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This is a variant of wpa_bss_get_ie() to allow IEs to be checked from
only Beacon frames similarly to how wpa_bss_get_vendor_ie_beacon()
behaves for vendor specific elements.

Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>
This commit is contained in:
Jouni Malinen 2024-07-11 23:50:55 +03:00 • committed by Jouni Malinen
parent d5d0012bfb
commit 89b164138c
2 changed files with 26 additions and 0 deletions
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25
wpa_supplicant/bss.c
View file

@ -1225,6 +1225,31 @@ const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie)
} }
/**
* wpa_bss_get_ie_beacon - Fetch a specified information element from a BSS entry
* @bss: BSS table entry
* @ie: Information element identitifier (WLAN_EID_*)
* Returns: Pointer to the information element (id field) or %NULL if not found
*
* This function returns the first matching information element in the BSS
* entry.
*
* This function is like wpa_bss_get_ie(), but uses IE buffer only from Beacon
* frames instead of either Beacon or Probe Response frames.
*/
const u8 * wpa_bss_get_ie_beacon(const struct wpa_bss *bss, u8 ie)
{
const u8 *ies;
if (bss->beacon_ie_len == 0)
return NULL;
ies = wpa_bss_ie_ptr(bss);
ies += bss->ie_len;
return get_ie(ies, bss->beacon_ie_len, ie);
}
/** /**
* wpa_bss_get_ie_ext - Fetch a specified extended IE from a BSS entry * wpa_bss_get_ie_ext - Fetch a specified extended IE from a BSS entry
* @bss: BSS table entry * @bss: BSS table entry

1
wpa_supplicant/bss.h
View file

@ -175,6 +175,7 @@ struct wpa_bss * wpa_bss_get_id(struct wpa_supplicant *wpa_s, unsigned int id);
struct wpa_bss * wpa_bss_get_id_range(struct wpa_supplicant *wpa_s, struct wpa_bss * wpa_bss_get_id_range(struct wpa_supplicant *wpa_s,
unsigned int idf, unsigned int idl); unsigned int idf, unsigned int idl);
const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie); const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie);
const u8 * wpa_bss_get_ie_beacon(const struct wpa_bss *bss, u8 ie);
const u8 * wpa_bss_get_ie_ext(const struct wpa_bss *bss, u8 ext); const u8 * wpa_bss_get_ie_ext(const struct wpa_bss *bss, u8 ext);
const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type); const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type);
const u8 * wpa_bss_get_vendor_ie_beacon(const struct wpa_bss *bss, const u8 * wpa_bss_get_vendor_ie_beacon(const struct wpa_bss *bss,