+
+ if (is_multi) {
+ /* in case of multiple IEs stored in buffer */
+ old_ie = old_ie_buff ? wpabuf_head_u8(old_ie_buff) : NULL;
+ new_ie = new_ie_buff ? wpabuf_head_u8(new_ie_buff) : NULL;
+ old_ie_len = old_ie_buff ? wpabuf_len(old_ie_buff) : 0;
+ new_ie_len = new_ie_buff ? wpabuf_len(new_ie_buff) : 0;
+ } else {
+ /* in case of single IE */
+ old_ie_len = old_ie ? old_ie[1] + 2 : 0;
+ new_ie_len = new_ie ? new_ie[1] + 2 : 0;
+ }
+
+ if (!old_ie || !new_ie)
+ ret = !old_ie && !new_ie;
+ else
+ ret = (old_ie_len == new_ie_len &&
+ os_memcmp(old_ie, new_ie, old_ie_len) == 0);
+
+ wpabuf_free(old_ie_buff);
+ wpabuf_free(new_ie_buff);
+
+ return ret;
+}
+
+
+static u32 wpa_bss_compare_res(const struct wpa_bss *old,
+ const struct wpa_scan_res *new_res)
+{
+ u32 changes = 0;
+ int caps_diff = old->caps ^ new_res->caps;
+
+ if (old->freq != new_res->freq)
+ changes |= WPA_BSS_FREQ_CHANGED_FLAG;
+
+ if (old->level != new_res->level)
+ changes |= WPA_BSS_SIGNAL_CHANGED_FLAG;
+
+ if (caps_diff & IEEE80211_CAP_PRIVACY)
+ changes |= WPA_BSS_PRIVACY_CHANGED_FLAG;
+
+ if (caps_diff & IEEE80211_CAP_IBSS)
+ changes |= WPA_BSS_MODE_CHANGED_FLAG;
+
+ if (old->ie_len == new_res->ie_len &&
+ os_memcmp(old + 1, new_res + 1, old->ie_len) == 0)
+ return changes;
+ changes |= WPA_BSS_IES_CHANGED_FLAG;
+
+ if (!are_ies_equal(old, new_res, WPA_IE_VENDOR_TYPE))
+ changes |= WPA_BSS_WPAIE_CHANGED_FLAG;
+
+ if (!are_ies_equal(old, new_res, WLAN_EID_RSN))
+ changes |= WPA_BSS_RSNIE_CHANGED_FLAG;
+
+ if (!are_ies_equal(old, new_res, WPS_IE_VENDOR_TYPE))
+ changes |= WPA_BSS_WPS_CHANGED_FLAG;
+
+ if (!are_ies_equal(old, new_res, WLAN_EID_SUPP_RATES) ||
+ !are_ies_equal(old, new_res, WLAN_EID_EXT_SUPP_RATES))
+ changes |= WPA_BSS_RATES_CHANGED_FLAG;
+
+ return changes;
+}
+
+
+static void notify_bss_changes(struct wpa_supplicant *wpa_s, u32 changes,
+ const struct wpa_bss *bss)
+{
+ if (changes & WPA_BSS_FREQ_CHANGED_FLAG)
+ wpas_notify_bss_freq_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_SIGNAL_CHANGED_FLAG)
+ wpas_notify_bss_signal_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_PRIVACY_CHANGED_FLAG)
+ wpas_notify_bss_privacy_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_MODE_CHANGED_FLAG)
+ wpas_notify_bss_mode_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_WPAIE_CHANGED_FLAG)
+ wpas_notify_bss_wpaie_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_RSNIE_CHANGED_FLAG)
+ wpas_notify_bss_rsnie_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_WPS_CHANGED_FLAG)
+ wpas_notify_bss_wps_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_IES_CHANGED_FLAG)
+ wpas_notify_bss_ies_changed(wpa_s, bss->id);
+
+ if (changes & WPA_BSS_RATES_CHANGED_FLAG)
+ wpas_notify_bss_rates_changed(wpa_s, bss->id);
+
+ wpas_notify_bss_seen(wpa_s, bss->id);