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Please see this
----- Original Message -----
Sent: Tuesday, August 29, 2006 12:00
PM
Subject: Re: [lwip-users] "minimal" on
unix
Thanks for replying.
I tried using tcp_connect(), with a
local IP address and the same port on which the server is listening. The
tcp_connect() returned but a connection with the server was not established
and the callback for tcp_connect() was never called.
I also tried
connecting using standard socket library connect. Please help me reach
the correct implementation.
I am also new to networking, please
point out any mistake in my testing. Do you or anyone else have a sample
tcp client implementation?
Currently echo.c does not seem to have it's
own low_level_xxx functions. So I was wondering whether tcp_xxx calls
use a default network interface when low_level_xxx functions are not
provided?
Thanks and regards,
Yadnesh
On 8/29/06, Mumtaz
Ahmad <address@hidden>
wrote:
Dear yadnesh
tcp_accept would get called if some client
tries to connect on a listening port .Just pingining does not trigger tcp
module .
Your second query is not clear .There is always
a need of some ethernet driver to actually send the data physically on
cable. So low_level_xxx functions need
to be implemented
Ahmad
-----
Original Message -----
Sent:
Tuesday, August 29, 2006 9:52 AM
Subject:
[lwip-users] "minimal" on unix
Hi All,
I am working on Linux and have just started learning
about lwIP functionality. So, studying the example
..../contrib/ports/unix/proj/minimal
There seem to be 2 different
types of implementation examples provided.
1) using
echo.c
In this tcp_new(), tcp_bind(), and
tcp_accept() are used.
I am really confused
about working of this implementation. tcp_accept() has specified
echo_accept() as a callback function for all packets received over the
network interface. But echo_accept() never seems to be called when I
ping the IP address.
Could somebody please give me some pointers
about what is happening here and whether I am doing something
wrong?
2) using
mintapif.c
This works perfectly fine for replying to
ping.
I have the following doubts:
1) Does lwIP communicate
directly over the Ethernet "eth0"? or the "tap" driver is always
required?
2) Is it mandatory for all applications to write code for
low_level_init(), low_level_input(), and low_level_output() ?
Thanks and Regards,
Yadnesh Phadke
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test_c.c