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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?
Kieran