This page describes the set of TCP-oriented tests which are embedded into the cFp_HelloKale/Role_BringUp.
The TCP Application Flash (TAF) connects to cFp_HelloKale/Shell_Kale via the TCP Shell Interface (TSIF) block. The main purpose of the TSIF is to provide a placeholder for the control flow related functions. Its use is not a prerequisite, but it is provided here with the aim of decoupling the data-path from the control flow.
A block diagram of the TCP Application Flash is depicted in Figure 1. It features:
- a Receive Path (RXp) process that waits for new data segments from the shell and forwards them to the process EchoPathThrough (EPt) or the EchoStoreAndForward (ESf) process upon the setting of the TCP destination port.
- a EchoStoreAndForward (ESf) process that loops the incoming traffic back to the producer. The echo is said to operate in "store-and-forward" mode because every received datagram is stored into the DDR4 memory before being read again from the DDR4 and sent back.
- a EchoPathThrough (EPt) process that loops the incoming traffic back to the producer in cut-through-mode.
- a Write Path (WRp) process that waits for new data segments from either the ESf or the EPt and forwards them to the TSIF.
Figure-1: Block diagram of the TCP Application Flash
| Acronym | Description | File |
|---|---|---|
| TAF | TCP Application Flash | tcp_app_flash |
| Acronym | Description | Filename |
|---|---|---|
| EPt | Echo Path Through process | tcp_app_flash |
| ESf | Echo Store And Forward process | tcp_app_flash |
| RXp | Receive Path process | tcp_app_flash |
| TXp | Transmit Path process | tcp_app_flash |