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_ssize_t fnet_socket_sendto ( fnet_socket_t  s, const void *  buf, fnet_size_t  len, fnet_flag_t  flags, const struct fnet_sockaddr *  to, fnet_size_t  tolen  ) Sends the data to a specific destination. Parameters s Descriptor, identifying a socket. buf Buffer containing the data to be transmitted. len Length of the data in buf. flags Optional flag specifying the way, in which the call is made. It can be constructed by using the bitwise OR operator with any of the values defined by the fnet_msg_flags_t. to Pointer to the address of the target socket. tolen Size of the address in to. Returns This function returns: The total number of bytes sent, if no error occurs. It can be lesser than the number indicated by len. FNET_ERR if an error occurs. The specific error code can be retrieved using the fnet_error_get(). See also fnet_socket_connect(), fnet_socket_send() For nonb-locking stream-oriented sockets (SOCK_STREAM), the number of actually sent bytes can be between 1 and the requested length, depending on buffer availability on both client and server machines. For message-oriented sockets (SOCK_DGRAM), care must be taken not not exceed the maximum datagram size, which can be obtained by using the fnet_socket_getopt() to retrieve the value of the socket option SO_SNDBUF. If the data is too long to pass atomically through the underlying datagram protocol, the error FNET_ERR_MSGSIZE is returned and no data is transmitted. Calling fnet_socket_sendto() with a zero len parameter is permissible. In such cases, the fnet_socket_sendto() will return zero as a valid value, and for message-oriented sockets (SOCK_DGRAM), a zero-length transport datagram is sent. The fnet_socket_sendto() function is normally used on a connectionless socket (SOCK_DGRAM) to send a datagram to a specific peer socket identified by the to parameter. Even if the connectionless socket has been previously connected to a specific address, the to parameter overrides the destination address for that particular datagram only. On a connection-oriented socket (SOCK_STREAM), the to and tolen parameters are ignored, making the fnet_socket_sendto() equivalent to fnet_socket_send(). The flags parameter can be used to influence the behavior of the function invocation beyond the options specified for the associated socket.