Datasheet

Flyport Wi-Fi and Ethernet Programmer's guide framework 2.3 (rev 1.0) www.openpicus.com

TCP Protocol

TCP, Transmission Control Protocol, is a packet oriented protocol. It can be used to transmit and

receive packets of data through the network between server and client.

• To use this kind of transmission, server and client should establish a connection. Since the

connection between server and client consumes network resources (exchanging protocol

service packets), it should be closed after the transmission is finished.

• In every TCP connection there is a Server and a Client, and Flyport can play both roles.

• The TCP/IP transmission is “full-duplex” capable, and all the packets sent arrive in source

order and “at most once”.

• By using acknowledgement, timeouts and checksums, the TCP protocol can check the

integrity of every packet and know if a packet arrived at the destination.

• At every host, multiple connections can be opened with the using of different ports, which

we will call the “TCP_SOCKETS”.

TCP Functions

Every TCP connection is identified by its TCP_SOCKET.

First of all one or more TCP_SOCKETs must be created:

TCP_SOCKET myTCPSocket = INVALID_SOCKET;

Every TCP_SOCKET needed by application must be properly sized in the IDE Wizard to optimize

Flyport memory. It is best to use the least possible both number of sockets and buffer lengths.