Accumulative patch from commit f5f37d3a4fc2df2a24676b4f95afca15ed793cba

Author: Jouni Malinen <j@w1.fi>
Date:   Sun Nov 25 22:05:32 2012 +0200

   Fix REAUTHENTICATE command after PMKSA caching

   The current PMKSA cache entry needs to be clear to allow EAPOL
   reauthentication to be started in case this association used PMKSA
   caching.

 - Remove old WPS_OOB NCF
 - WPS: Add preliminary NFC connection handover support for Enrollee
 - WPS: Reenable the networks disabled during wpa_wpas_reassoc
 - P2P: Avoid multi-channel scans when they are not needed
 - P2P: Allow discoverable interval for p2p_find to be configured
 - P2P: Allow all channels with multi-channel concurrency
 - Bonjour changes
 - Remove disassociate
 - HS 2.0 changes
 - Add preliminary support for using SQLite for eap_user database
 - Add SAE support
 - Add disallow_aps parameter to disallow BSSIDs/SSIDs

Change-Id: I85358a05b39d46b8db49acdad667e771c580b05c
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/wpa_supplicant/bss.c b/wpa_supplicant/bss.c
index 6223beb..0babbd5 100644
--- a/wpa_supplicant/bss.c
+++ b/wpa_supplicant/bss.c
@@ -62,6 +62,60 @@
 }
 
 
+static struct wpa_bss_anqp * wpa_bss_anqp_clone(struct wpa_bss_anqp *anqp)
+{
+	struct wpa_bss_anqp *n;
+
+	n = os_zalloc(sizeof(*n));
+	if (n == NULL)
+		return NULL;
+
+#define ANQP_DUP(f) if (anqp->f) n->f = wpabuf_dup(anqp->f)
+#ifdef CONFIG_INTERWORKING
+	ANQP_DUP(venue_name);
+	ANQP_DUP(network_auth_type);
+	ANQP_DUP(roaming_consortium);
+	ANQP_DUP(ip_addr_type_availability);
+	ANQP_DUP(nai_realm);
+	ANQP_DUP(anqp_3gpp);
+	ANQP_DUP(domain_name);
+#endif /* CONFIG_INTERWORKING */
+#ifdef CONFIG_HS20
+	ANQP_DUP(hs20_operator_friendly_name);
+	ANQP_DUP(hs20_wan_metrics);
+	ANQP_DUP(hs20_connection_capability);
+	ANQP_DUP(hs20_operating_class);
+#endif /* CONFIG_HS20 */
+#undef ANQP_DUP
+
+	return n;
+}
+
+
+int wpa_bss_anqp_unshare_alloc(struct wpa_bss *bss)
+{
+	struct wpa_bss_anqp *anqp;
+
+	if (bss->anqp && bss->anqp->users > 1) {
+		/* allocated, but shared - clone an unshared copy */
+		anqp = wpa_bss_anqp_clone(bss->anqp);
+		if (anqp == NULL)
+			return -1;
+		anqp->users = 1;
+		bss->anqp->users--;
+		bss->anqp = anqp;
+		return 0;
+	}
+
+	if (bss->anqp)
+		return 0; /* already allocated and not shared */
+
+	/* not allocated - allocate a new storage area */
+	bss->anqp = wpa_bss_anqp_alloc();
+	return bss->anqp ? 0 : -1;
+}
+
+
 static void wpa_bss_anqp_free(struct wpa_bss_anqp *anqp)
 {
 	if (anqp == NULL)