HS 2.0R2: Add update_identifier field to network

This can be used to configure a Hotspot 2.0 Release 2 network externally
for a case where wpa_supplicant-based Interworking network selection is
not used and the update_identifier cannot be copied directly from a
cred.

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

wpa_supplicant/config.c

@@ -1751,6 +1751,9 @@ static const struct parse_data ssid_fields[] = {
 #ifdef CONFIG_MACSEC
 	{ INT_RANGE(macsec_policy, 0, 1) },
 #endif /* CONFIG_MACSEC */
+#ifdef CONFIG_HS20
+	{ INT(update_identifier) },
+#endif /* CONFIG_HS20 */
 };
 
 #undef OFFSET

wpa_supplicant/config_file.c

@@ -739,6 +739,9 @@ static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 #ifdef CONFIG_MACSEC
 	INT(macsec_policy);
 #endif /* CONFIG_MACSEC */
+#ifdef CONFIG_HS20
+	INT(update_identifier);
+#endif /* CONFIG_HS20 */
 
 #undef STR
 #undef INT

wpa_supplicant/config_ssid.h

@@ -647,6 +647,10 @@ struct wpa_ssid {
 	 */
 	int macsec_policy;
 #endif /* CONFIG_MACSEC */
+
+#ifdef CONFIG_HS20
+	int update_identifier;
+#endif /* CONFIG_HS20 */
 };
 
 #endif /* CONFIG_SSID_H */

wpa_supplicant/config_winreg.c

@@ -930,6 +930,9 @@ static int wpa_config_write_network(HKEY hk, struct wpa_ssid *ssid, int id)
 		  MGMT_FRAME_PROTECTION_DEFAULT);
 #endif /* CONFIG_IEEE80211W */
 	STR(id_str);
+#ifdef CONFIG_HS20
+	INT(update_identifier);
+#endif /* CONFIG_HS20 */
 
 #undef STR
 #undef INT

wpa_supplicant/hs20_supplicant.c

@@ -109,7 +109,13 @@ int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 {
 	struct wpa_cred *cred;
 
-	if (ssid == NULL || ssid->parent_cred == NULL)
+	if (ssid == NULL)
+		return 0;
+
+	if (ssid->update_identifier)
+		return ssid->update_identifier;
+
+	if (ssid->parent_cred == NULL)
 		return 0;
 
 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {