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MBO: Add option to add MBO query list to ANQP query 

MBO techspec v0.0_r27 changed the MBO ANQP-element format. The MBO
element in ANQP query should now include an MBO Query List element that
contains a list of MBO elements to query.

Add API to add the MBO Query List to an ANQP query.

Format:
ANQP_GET <addr> <info_id>[,<info_id>]...[,mbo:<subtype>...]

Example for querying neighbor report with MBO cellular data
connection preference:
ANQP_GET <bssid> 272,mbo:2

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
This commit is contained in:
Avraham Stern 2017-03-09 15:19:58 +02:00 committed by Jouni Malinen
parent f7c25d1a50
commit 2316cb358c
6 changed files with 26 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/common/ieee802_11_defs.h
View File

@ -1419,9 +1419,11 @@ enum wfa_wnm_notif_subelem_id {
WFA_WNM_NOTIF_SUBELEM_CELL_DATA_CAPA = 3,
};
/* MBO v0.0_r25, 4.3: MBO ANQP-elements */
/* MBO v0.0_r27, 4.3: MBO ANQP-elements */
#define MBO_ANQP_OUI_TYPE 0x12
#define MBO_ANQP_SUBTYPE_CELL_CONN_PREF 1
#define MBO_ANQP_SUBTYPE_QUERY_LIST 1
#define MBO_ANQP_SUBTYPE_CELL_CONN_PREF 2
#define MAX_MBO_ANQP_SUBTYPE MBO_ANQP_SUBTYPE_CELL_CONN_PREF
/* Wi-Fi Direct (P2P) */

9
wpa_supplicant/ctrl_iface.c
View File

@ -6712,7 +6712,7 @@ static int get_anqp(struct wpa_supplicant *wpa_s, char *dst)
u16 id[MAX_ANQP_INFO_ID];
size_t num_id = 0;
u32 subtypes = 0;
int get_cell_pref = 0;
u32 mbo_subtypes = 0;
used = hwaddr_aton2(dst, dst_addr);
if (used < 0)
@ -6733,9 +6733,10 @@ static int get_anqp(struct wpa_supplicant *wpa_s, char *dst)
} else if (os_strncmp(pos, "mbo:", 4) == 0) {
#ifdef CONFIG_MBO
int num = atoi(pos + 4);
if (num != MBO_ANQP_SUBTYPE_CELL_CONN_PREF)
if (num <= 0 || num > MAX_MBO_ANQP_SUBTYPE)
return -1;
get_cell_pref = 1;
mbo_subtypes |= BIT(num);
#else /* CONFIG_MBO */
return -1;
#endif /* CONFIG_MBO */
@ -6754,7 +6755,7 @@ static int get_anqp(struct wpa_supplicant *wpa_s, char *dst)
return -1;
return anqp_send_req(wpa_s, dst_addr, id, num_id, subtypes,
get_cell_pref);
mbo_subtypes);
}

6
wpa_supplicant/interworking.c
View File

@ -2694,7 +2694,7 @@ void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
u16 info_ids[], size_t num_ids, u32 subtypes,
int get_cell_pref)
u32 mbo_subtypes)
{
struct wpabuf *buf;
struct wpabuf *extra_buf = NULL;
@ -2728,10 +2728,10 @@ int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
#endif /* CONFIG_HS20 */
#ifdef CONFIG_MBO
if (get_cell_pref) {
if (mbo_subtypes) {
struct wpabuf *mbo;
mbo = mbo_build_anqp_buf(wpa_s, bss);
mbo = mbo_build_anqp_buf(wpa_s, bss, mbo_subtypes);
if (mbo) {
if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) {
wpabuf_free(extra_buf);

2
wpa_supplicant/interworking.h
View File

@ -13,7 +13,7 @@ enum gas_query_result;
int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
u16 info_ids[], size_t num_ids, u32 subtypes,
int get_cell_pref);
u32 mbo_subtypes);
void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,

15
wpa_supplicant/mbo.c
View File

@ -515,10 +515,11 @@ void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa)
struct wpabuf * mbo_build_anqp_buf(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss)
struct wpa_bss *bss, u32 mbo_subtypes)
{
struct wpabuf *anqp_buf;
u8 *len_pos;
u8 i;
if (!wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE)) {
wpa_printf(MSG_INFO, "MBO: " MACSTR
@ -527,7 +528,8 @@ struct wpabuf * mbo_build_anqp_buf(struct wpa_supplicant *wpa_s,
return NULL;
}
anqp_buf = wpabuf_alloc(10);
/* Allocate size for the maximum case - all MBO subtypes are set */
anqp_buf = wpabuf_alloc(9 + MAX_MBO_ANQP_SUBTYPE);
if (!anqp_buf)
return NULL;
@ -535,7 +537,14 @@ struct wpabuf * mbo_build_anqp_buf(struct wpa_supplicant *wpa_s,
wpabuf_put_be24(anqp_buf, OUI_WFA);
wpabuf_put_u8(anqp_buf, MBO_ANQP_OUI_TYPE);
wpabuf_put_u8(anqp_buf, MBO_ANQP_SUBTYPE_CELL_CONN_PREF);
wpabuf_put_u8(anqp_buf, MBO_ANQP_SUBTYPE_QUERY_LIST);
/* The first valid MBO subtype is 1 */
for (i = 1; i <= MAX_MBO_ANQP_SUBTYPE; i++) {
if (mbo_subtypes & BIT(i))
wpabuf_put_u8(anqp_buf, i);
}
gas_anqp_set_element_len(anqp_buf, len_pos);
return anqp_buf;

2
wpa_supplicant/wpa_supplicant_i.h
View File

@ -1294,7 +1294,7 @@ size_t wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant *wpa_s, u8 *pos,
enum mbo_transition_reject_reason reason);
void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa);
struct wpabuf * mbo_build_anqp_buf(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss);
struct wpa_bss *bss, u32 mbo_subtypes);
/* op_classes.c */
enum chan_allowed {