+/// Try to discover the external address for the local node.
+/** This function performs tries to discover the local node's external address
+ * by contacting the meshlink.io server. If a reverse lookup of the address works,
+ * the FQDN associated with the address will be returned.
+ *
+ * Please note that this is function only returns a single address,
+ * even if the local node might have more than one external address.
+ * In that case, there is no control over which address will be selected.
+ * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
+ * there is no guarantee that the external address will be valid for an extended period of time.
+ *
+ * This function is blocking. It can take several seconds before it returns.
+ * There is no guarantee it will be able to resolve the external address.
+ * Failures might be because by temporary network outages.
+ *
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
+ * this might return the external address for any working address family.
+ *
+ * @return This function returns a pointer to a C string containing the discovered external address,
+ * or NULL if there was an error looking up the address.
+ * After meshlink_get_external_address_for_family() returns, the application is free to overwrite or free this string.
+ */
+extern char *meshlink_get_external_address_for_family(meshlink_handle_t *mesh, int address_family);
+
+/// Try to discover the local address for the local node.
+/** This function performs tries to discover the address of the local interface used for outgoing connection.
+ *
+ * Please note that this is function only returns a single address,
+ * even if the interface might have more than one address.
+ * In that case, there is no control over which address will be selected.
+ * Also note that if you have a dynamic IP address,
+ * there is no guarantee that the local address will be valid for an extended period of time.
+ *
+ * This function will fail if it couldn't find a local address for the given address family.
+ * If hostname resolving is requested, this function may block for a few seconds.
+ *
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
+ * this might return the local address for any working address family.
+ *
+ * @return This function returns a pointer to a C string containing the discovered local address,
+ * or NULL if there was an error looking up the address.
+ * After meshlink_get_local_address_for_family() returns, the application is free to overwrite or free this string.
+ */
+extern char *meshlink_get_local_address_for_family(meshlink_handle_t *mesh, int address_family);
+