No problem to revive an old thread.
You can find all FreeRTOS+TCP drivers on Github here.
But… the driver for SAME70 is not there, only an old driver called ‘ATSAM4E’.
Here’s a copy of the driver that you probably found on SourceForge:
SAME70_plus_tcp_driver.zip (54.4 KB)
And here is the latest driver, that should work for both SAM4E and SAME70:
DriverSAM_plus_tcp_driver.zip (24.2 KB)
I recommend using the last driver because it is the newest. Please report how it goes.
I will prepare a pull request so it will be added to the repository on Github.