Copy Chargeable-User-Identity in PMKSA caching case

Maintain a copy of Chargeable-User-Identity in the PMKSA cache to allow
it to be included in accounting messages even if full authentication was
not completed.

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

src/ap/pmksa_cache_auth.c

@@ -1,6 +1,6 @@
 /*
  * hostapd - PMKSA cache for IEEE 802.11i RSN
- * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2004-2008, 2012, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -40,6 +40,7 @@ static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry)
 	if (entry == NULL)
 		return;
 	os_free(entry->identity);
+	wpabuf_free(entry->cui);
 #ifndef CONFIG_NO_RADIUS
 	radius_free_class(&entry->radius_class);
 #endif /* CONFIG_NO_RADIUS */
@@ -136,6 +137,9 @@ static void pmksa_cache_from_eapol_data(struct rsn_pmksa_cache_entry *entry,
 		}
 	}
 
+	if (eapol->radius_cui)
+		entry->cui = wpabuf_dup(eapol->radius_cui);
+
 #ifndef CONFIG_NO_RADIUS
 	radius_copy_class(&entry->radius_class, &eapol->radius_class);
 #endif /* CONFIG_NO_RADIUS */
@@ -163,6 +167,11 @@ void pmksa_cache_to_eapol_data(struct rsn_pmksa_cache_entry *entry,
 				  eapol->identity, eapol->identity_len);
 	}
 
+	if (entry->cui) {
+		wpabuf_free(eapol->radius_cui);
+		eapol->radius_cui = wpabuf_dup(entry->cui);
+	}
+
 #ifndef CONFIG_NO_RADIUS
 	radius_free_class(&eapol->radius_class);
 	radius_copy_class(&eapol->radius_class, &entry->radius_class);
@@ -299,6 +308,8 @@ pmksa_cache_add_okc(struct rsn_pmksa_cache *pmksa,
 				  old_entry->identity_len);
 		}
 	}
+	if (old_entry->cui)
+		entry->cui = wpabuf_dup(old_entry->cui);
 #ifndef CONFIG_NO_RADIUS
 	radius_copy_class(&entry->radius_class, &old_entry->radius_class);
 #endif /* CONFIG_NO_RADIUS */

src/ap/pmksa_cache_auth.h

@@ -1,6 +1,6 @@
 /*
  * hostapd - PMKSA cache for IEEE 802.11i RSN
- * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2004-2008, 2012, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -25,6 +25,7 @@ struct rsn_pmksa_cache_entry {
 
 	u8 *identity;
 	size_t identity_len;
+	struct wpabuf *cui;
 	struct radius_class_data radius_class;
 	u8 eap_type_authsrv;
 	int vlan_id;