[ECOS] max IP packet size = 9216 B. Why?

Jürgen Lambrecht J.Lambrecht@televic.com
Tue Jun 12 21:58:00 GMT 2007


I found out that the maximum IP packet size = 9216 B (0x2400).
I implemented an echo program, both udp and tcp.
My ecos applic can receive more that 9216B, but not send back more than 

Has anybody a clue how to solve this?
I need to support the maximum IP packet size of 65535 B (IP_MAXPACKET).
I don't know if this is a bug in ecos, or a (hidden?) limitation of an 
embedded OS.

Juergen Lambrecht

I'm busy tracing this back in the source
This comes from the socket that is allocated statically in 
/io/fileio/.../fd.cxx and socket is part of a cyg_file (cyg_file is 
defined by file in file.h). In cyg_file there is a member f_data, which 
is the socket.
I'm continuing my search in the code at this point....

Jürgen Lambrecht
R&D Engineer
Televic Transport Systems
Televic NV / SA (main office)  	
Leo Bekaertlaan 1
B-8870 Izegem
Tel: +32 (0)51 303045
Fax: +32 (0)51 310670

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