+/**
+ * wpa_bss_anqp_clone - Clone an ANQP data structure
+ * @anqp: ANQP data structure from wpa_bss_anqp_alloc()
+ * Returns: Cloned ANQP data structure or %NULL on failure
+ */
+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
+ dl_list_init(&n->anqp_elems);
+ ANQP_DUP(capability_list);
+ 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_capability_list);
+ ANQP_DUP(hs20_operator_friendly_name);
+ ANQP_DUP(hs20_wan_metrics);
+ ANQP_DUP(hs20_connection_capability);
+ ANQP_DUP(hs20_operating_class);
+ ANQP_DUP(hs20_osu_providers_list);
+#endif /* CONFIG_HS20 */
+#undef ANQP_DUP
+
+ return n;
+}
+
+
+/**
+ * wpa_bss_anqp_unshare_alloc - Unshare ANQP data (if shared) in a BSS entry
+ * @bss: BSS entry
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function ensures the specific BSS entry has an ANQP data structure that
+ * is not shared with any other BSS entry.
+ */
+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;
+}
+
+
+/**
+ * wpa_bss_anqp_free - Free an ANQP data structure
+ * @anqp: ANQP data structure from wpa_bss_anqp_alloc() or wpa_bss_anqp_clone()
+ */