FILS: Make FILS Indication element information available in BSS output

This extends wpa_supplicant BSS command to parse FILS Indication
element.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/common/wpa_ctrl.h

@@ -320,6 +320,7 @@ extern "C" {
 #define WPA_BSS_MASK_FST		BIT(21)
 #define WPA_BSS_MASK_UPDATE_IDX		BIT(22)
 #define WPA_BSS_MASK_BEACON_IE		BIT(23)
+#define WPA_BSS_MASK_FILS_INDICATION	BIT(24)
 
 
 /* VENDOR_ELEM_* frame id values */

wpa_supplicant/ctrl_iface.c

@@ -4101,6 +4101,78 @@ static char * anqp_add_hex(char *pos, char *end, const char *title,
 #endif /* CONFIG_INTERWORKING */
 
 
+#ifdef CONFIG_FILS
+static int print_fils_indication(struct wpa_bss *bss, char *pos, char *end)
+{
+	char *start = pos;
+	const u8 *ie, *ie_end;
+	u16 info, realms;
+	int ret;
+
+	ie = wpa_bss_get_ie(bss, WLAN_EID_FILS_INDICATION);
+	if (!ie)
+		return 0;
+	ie_end = ie + 2 + ie[1];
+	ie += 2;
+	if (ie_end - ie < 2)
+		return -1;
+
+	info = WPA_GET_LE16(ie);
+	ie += 2;
+	ret = os_snprintf(pos, end - pos, "fils_info=%04x\n", info);
+	if (os_snprintf_error(end - pos, ret))
+		return 0;
+	pos += ret;
+
+	if (info & BIT(7)) {
+		/* Cache Identifier Included */
+		if (ie_end - ie < 2)
+			return -1;
+		ret = os_snprintf(pos, end - pos, "fils_cache_id=%02x%02x\n",
+				  ie[0], ie[1]);
+		if (os_snprintf_error(end - pos, ret))
+			return 0;
+		pos += ret;
+		ie += 2;
+	}
+
+	if (info & BIT(8)) {
+		/* HESSID Included */
+		if (ie_end - ie < ETH_ALEN)
+			return -1;
+		ret = os_snprintf(pos, end - pos, "fils_hessid=" MACSTR "\n",
+				  MAC2STR(ie));
+		if (os_snprintf_error(end - pos, ret))
+			return 0;
+		pos += ret;
+		ie += ETH_ALEN;
+	}
+
+	realms = (info & (BIT(3) | BIT(4) | BIT(5))) >> 3;
+	if (realms) {
+		if (ie_end - ie < realms * 2)
+			return -1;
+		ret = os_snprintf(pos, end - pos, "fils_realms=");
+		if (os_snprintf_error(end - pos, ret))
+			return 0;
+		pos += ret;
+
+		ret = wpa_snprintf_hex(pos, end - pos, ie, realms * 2);
+		if (ret <= 0)
+			return 0;
+		pos += ret;
+		ie += realms * 2;
+		ret = os_snprintf(pos, end - pos, "\n");
+		if (os_snprintf_error(end - pos, ret))
+			return 0;
+		pos += ret;
+	}
+
+	return pos - start;
+}
+#endif /* CONFIG_FILS */
+
+
 static int print_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
 			  unsigned long mask, char *buf, size_t buflen)
 {
@@ -4473,6 +4545,15 @@ static int print_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
 		pos += ret;
 	}
 
+#ifdef CONFIG_FILS
+	if (mask & WPA_BSS_MASK_FILS_INDICATION) {
+		ret = print_fils_indication(bss, pos, end);
+		if (ret < 0)
+			return 0;
+		pos += ret;
+	}
+#endif /* CONFIG_FILS */
+
 	if (mask & WPA_BSS_MASK_DELIM) {
 		ret = os_snprintf(pos, end - pos, "====\n");
 		if (os_snprintf_error(end - pos, ret))