From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gary Guangyu Pei <pei@CS.UCLA.EDU>
To: Gary Thomas <gthomas@cambridge.redhat.com>
Cc: ecos-discuss@sources.redhat.com
Subject: RE: [ECOS] problem with TCP/IP stack
Date: Fri, 26 Jan 2001 16:39:00 -0000
Message-id: <Pine.SOL.4.10.10101261633010.19909-100000@k2.cs.ucla.edu>
References: <XFMail.20010126144559.gthomas@cambridge.redhat.com>
X-SW-Source: 2001-01/msg00440.html

Yes, you are right. I modified one of the test program: udp_lo_test.c
program. Instead of using a loopback address, I use the real IP address.
Thank you,
Gary
On Fri, 26 Jan 2001, Gary Thomas wrote:

|Are you trying to run one of our test/demo programs?  If not, I'm not
|sure I understand your "UDP server" terminology.
|
|On 26-Jan-2001 Gary Guangyu Pei wrote:
|> Hi,
|> I encountered the following problem with TCP/IP stack:
|> It cannot run both UDP server and client together. If I run server only,
|> it can receive UDP packets from the other nodes. However, if I run both
|> client and server, the client can keep on sending out packets, the server
|> will stop receiving packets after it receives the first packet (or
|> sometime the first 2 packets) from a client. I use the gdb to trace the
|> program. I find the received packages travelling along the protocol stack
|> all way up to udp_usrreq.c. After calling the sorwakeup() at line 565, the
|> server thread never gets to run.
|> 
|> Does anyone know what might go wrong? Do you have similar experience?
|> 
|> The network priority is 7. I tried both 6,7,8 priority for the udp server.
|> 
|> Thank you very much, any suggestion is highly appreciated.
|> 
|> Gary
|> 
|