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_recvfrom ( fnet_socket_t  s, void *  buf, fnet_size_t  len, fnet_flag_t  flags, struct fnet_sockaddr *  from, fnet_size_t *  fromlen  ) Receives the data and captures the address, from which the data was sent. Parameters s Descriptor, identifying a bound socket. buf Buffer for the incoming data. len Length of the 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. from Optional pointer to a buffer that will hold the source address upon return. fromlen Optional pointer to the size of the from buffer. Returns This function returns: The number of bytes received, if no error occurs. The return value is set to zero, if the socket is nonblocking and there is no input data. FNET_ERR if an error occurs. The specific error code can be retrieved using the fnet_error_get(). See also fnet_socket_bind(), fnet_socket_recv() For connection-oriented sockets (SOCK_STREAM), calling the fnet_socket_recvfrom() will return as much information as is currently available up to the size of the buffer supplied. The fnet_socket_recvfrom() call is rarely used for stream sockets, because the routine provides the peer-socket information, and stream sockets are tied to a specific peer. For connectionless sockets (SOCK_DGRAM), the data is extracted from the first enqueued datagram. If the datagram is larger than the buffer supplied, the buffer is filled with the first part of the datagram, and the fnet_socket_recvfrom() generates the error FNET_ERR_MSGSIZE and the excess data is lost. If the from parameter is non-zero, the network address of the peer that sent the data is copied to the corresponding fnet_sockaddr structure. The value pointed to by fromlen is initialized to the size of this structure and is modified on return, to indicate the actual size of the address stored in the fnet_sockaddr structure. The flags parameter can be used to influence the behavior of the function invocation beyond the options specified for the associated socket.