AF_INET AF_INET6 AF_SUPPORTED AF_UNSPEC fnet_address_family_t FNET_HTONL fnet_htonl FNET_HTONS fnet_htons fnet_inet_aton fnet_inet_ntoa fnet_inet_ntop fnet_inet_pton fnet_inet_ptos FNET_IP4_ADDR_INIT FNET_IP4_ADDR_STR_SIZE fnet_ip4_addr_t FNET_IP6_ADDR_STR_SIZE FNET_IP_ADDR_STR_SIZE fnet_msg_flags_t FNET_NTOHL fnet_ntohl FNET_NTOHS fnet_ntohs fnet_protocol_t FNET_SA_DATA_SIZE fnet_scope_id_t fnet_sd_flags_t fnet_socket fnet_socket_accept fnet_socket_addr_are_equal fnet_socket_addr_is_multicast fnet_socket_addr_is_unspecified fnet_socket_bind fnet_socket_close fnet_socket_connect fnet_socket_getname fnet_socket_getopt fnet_socket_getpeername fnet_socket_listen fnet_socket_options_t fnet_socket_recv fnet_socket_recvfrom fnet_socket_send fnet_socket_sendto fnet_socket_set_callback_on_rx fnet_socket_setopt fnet_socket_shutdown fnet_socket_state_t fnet_socket_t fnet_socket_type_t INADDR_ANY INADDR_BROADCAST

fnet_return_t fnet_socket_close ( fnet_socket_t  s ) Closes an existing socket. Parameters s Descriptor, identifying a socket to close. Returns This function returns: FNET_OK if no error occurs. FNET_ERR if an error occurs. The specific error code can be retrieved using the fnet_error_get(). See also fnet_socket() This function releases the socket descriptor s, so that further references to s fail with the error FNET_ERR_BAD_DESC. An application should always have a matching call to the fnet_socket_close() for each successful call to the fnet_socket() to return any socket resources to the system. For the SOCK_STREAM sockets, the SO_LINGER option controls the action of the closing, when unsent data is present on the socket and the fnet_socket_close() function is performed. This option has effect on TCP sockets only. To enable or disable the SO_LINGER option, the application should use the fnet_linger structure. This structure includes the l_onoff and the l_linger fields. If the l_onoff has a non-zero value, then the SO_LINGER is enabled. Otherwise, the SO_LINGER option is disabled. The l_linger field includes the timeout in seconds. If the SO_LINGER option is not used , the remaining data of the output buffer can be sent after the execution of the fnet_socket_close() in the background. If a timeout expires and unsent data is present, the hard reset occurs and unsent data will be deleted. If the SO_LINGER option is used with a zero timeout interval, the hard reset occurs immediately and unsent data will be deleted.