LIBNUTCLIENT_TCP(3) NUT Manual LIBNUTCLIENT_TCP(3)

libnutclient_tcp, nutclient_tcp_create_client, nutclient_tcp_is_connected, nutclient_tcp_disconnect, nutclient_tcp_reconnect, nutclient_tcp_set_timeout, nutclient_tcp_get_timeout - TCP protocol related function for Network UPS Tools high-level client access library

        #include <nutclient.h>
        #include <cstdint> /* uint16_t */
        #include <ctime> /* time_t */
        typedef NUTCLIENT_t NUTCLIENT_TCP_t;
        NUTCLIENT_TCP_t nutclient_tcp_create_client(
                const char* host, uint16_t port);
        int nutclient_tcp_is_connected(NUTCLIENT_TCP_t client);
        void nutclient_tcp_disconnect(NUTCLIENT_TCP_t client);
        int nutclient_tcp_reconnect(NUTCLIENT_TCP_t client);
        void nutclient_tcp_set_timeout(NUTCLIENT_TCP_t client, time_t timeout);
        time_t nutclient_tcp_get_timeout(NUTCLIENT_TCP_t client);

These functions allow to manage connections to upsd(8) using NUT TCP protocol.

•The nutclient_tcp_create_client() function create the NUTCLIENT_TCP_t context and intend to connect to upsd at host and port.

The context must be freed by nutclient_destroy().

•host can be a sever name or a valid IPv4 or IPv6 address like "localhost", "127.0.0.1" or "::1".
•port is a valid TCP port, generally 3493.
•The nutclient_tcp_is_connected() function test if the connection is valid.
•The nutclient_tcp_disconnect() function force to disconnect the specified connection.
•The nutclient_tcp_reconnect() function force to reconnect a connection, disconnecting it if needed.
•The nutclient_tcp_set_timeout() function set the timeout duration for I/O operations.
•The nutclient_tcp_get_timeout() function retrieve the timeout duration for I/O operations.

timeout values are specified in seconds, use negative values for blocking.

libnutclient(3) libnutclient_general(3)

05/29/2025 Network UPS Tools 2.8.3