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Re: [lwip-users] tcp_sndbuf always returns 0

From: Kieran Mansley
Subject: Re: [lwip-users] tcp_sndbuf always returns 0
Date: Thu, 16 Jul 2009 16:45:51 +0100

On Thu, 2009-07-16 at 23:39 +0800, WU Rui-Qing wrote:
> Hi,
>    I want to port httpd.c as a high-speed server, it reads data from a
> FIFO and send data to TCP client. After it works for a moment, it
> slows down. tcp_sndbuf always returns 0.

Suggests that lwIP is waiting for an ACK for some of its packets from
the other end.  Could you send a packet capture (e.g. from wireshark) so
we can see if there's a problem?


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