Data Structures | |
struct | udp_socket |
UDP socket information structure. More... | |
struct | tcp_socket |
TCP socket information structure. More... | |
typedef udp_socket | UDPSOCKET |
UDP socket type. | |
Defines | |
#define | SO_FIN |
Socket transmit flag. Send FIN after all data has been transmitted. | |
#define | SO_SYN |
Socket transmit flag. Send SYN first. | |
#define | SO_FORCE |
Socket transmit flag. Force sending ACK. | |
#define | SO_ACK |
Socket transmit flag. Send ACK. | |
Typedefs | |
typedef tcp_socket | TCPSOCKET |
TCP socket type. | |
Functions | |
void | NutUdpInput (NETBUF *nb, ureg_t bcast) |
Handle incoming UDP packets. | |
int | NutUdpOutput (UDPSOCKET *sock, u_long dest, u_short port, NETBUF *nb) |
Send a UDP packet. | |
int | NutTcpOutput (TCPSOCKET *sock, CONST u_char *data, u_short size) |
Initiate TCP segment transmission. | |
int | NutTcpReject (NETBUF *nb) |
Reject an incoming segment. |
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Initiate TCP segment transmission. Check the TCP socket status and send any segment waiting for transmission. The function will not return until the data has been stored in the network device hardware for transmission. If the device is not ready for transmitting a new packet, the calling thread will be suspended until the device becomes ready again. If the target host is connected through an Ethernet network and if the hardware address of that host is currently unknown, an ARP request is sent out and the function will block until a response is received or an ARP timeout occurs. Segments containing data or SYN and FIN flags are added to a special queue for unacknowledged segments and will be retransmitted by the TCP timer thread, if not acknowledged by the remote within a specific time. The state machine will remove these segments from the queue as soon as they are acknowledged.
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Reject an incoming segment. Send RST in response to an incoming segment, which should be rejected. The function avoids to send out a RST segment in response to an incoming RST segment.
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