+extern bool meshlink_add_address(struct meshlink_handle *mesh, const char *address) __attribute__((__warn_unused_result__, __deprecated__("use meshlink_set_canonical_address() and/or meshlink_add_invitation_address() instead")));
+
+/// 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.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ *
+ * @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() returns, the application is free to overwrite or free this string.
+ */
+extern char *meshlink_get_external_address(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__));
+
+/// 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.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param address_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(struct meshlink_handle *mesh, int address_family) __attribute__((__warn_unused_result__));
+
+/// 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.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param address_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(struct meshlink_handle *mesh, int address_family) __attribute__((__warn_unused_result__));
+
+/// Try to discover the external address for the local node, and add it to its list of addresses.
+/** This function is equivalent to:
+ *
+ * meshlink_set_canonical_address(mesh, meshlink_get_self(mesh), meshlink_get_external_address(mesh), NULL);
+ *
+ * Read the description of meshlink_get_external_address() for the limitations of this function.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ *
+ * @return This function returns true if the address was added, false otherwise.
+ */
+extern bool meshlink_add_external_address(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__));
+
+/// Get the network port used by the local node.
+/** This function returns the network port that the local node is listening on.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ *
+ * @return This function returns the port number, or -1 in case of an error.
+ */
+extern int meshlink_get_port(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__));
+
+/// Set the network port used by the local node.
+/** This function sets the network port that the local node is listening on.
+ * It may only be called when the mesh is not running.
+ * If unsure, call meshlink_stop() before calling this function.
+ * Also note that if your node is already part of a mesh with other nodes,
+ * that the other nodes may no longer be able to initiate connections to the local node,
+ * since they will try to connect to the previously configured port.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param port The port number to listen on. This must be between 0 and 65535.
+ * If the port is set to 0, then MeshLink will listen on a port
+ * that is randomly assigned by the operating system every time meshlink_open() is called.
+ *
+ * @return This function returns true if the port was successfully changed
+ * to the desired port, false otherwise. If it returns false, there
+ * is no guarantee that MeshLink is listening on the old port.
+ */
+
+extern bool meshlink_set_port(struct meshlink_handle *mesh, int port) __attribute__((__warn_unused_result__));
+
+/// Set the timeout for invitations.
+/** This function sets the timeout for invitations.
+ * Note that timeouts are only checked at the time a node tries to join using an invitation.
+ * The default timeout for invitations is 1 week.
+ *
+ * \memberof meshlink_handle
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param timeout The timeout for invitations in seconds.
+ */
+extern void meshlink_set_invitation_timeout(struct meshlink_handle *mesh, int timeout);