Re: [lwip-users] tcp_connection cann't start the callback function after connection successfully

[vincent cui]

Keiran:

ftp works now ... the data port from PORT command is wrong....

锘?Vincent Cui
Sr.Firmware Engineer
Mobile: +8613482482211
Tel: +86 21 34612525x6104
Fax: +86 21 34619770
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Shanghai EnLogic Electric Technology Co., Ltd.
Address: 1104-1106, Building A, No.391, Guiping Road, Xuhui District, Shanghai, 
200233
http://www.enlogic.com

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Kieran Mansley
Sent: 2011年9月6日 18:36
To: Mailing list for lwIP users
Subject: Re: [lwip-users] tcp_connection cann't start the callback function 
after connection successfully

On Tue, 2011-09-06 at 10:17 +0000, vincent cui wrote:
> Please check attached file 

A screenshot of the packet capture?  If you have the packet capture,
please send that instead of a screenshot, as it has so much more useful
information.

Let me summarise what I think the situation is, please correct me if I'm
wrong:

- You have an FTP server running on your lwIP device.
- You use an FTP client on windows to try to connect to it
- It connects successfully and you can log in.
- You've called tcp_connect() on your lwIP device to open a data
connection.
- We see the SYN for this new connection in the packet capture, but
Windows seems to ignore it.
- You don't see the connected callback invoked (which makes sense, as it
is not connected)

I would guess that this is nothing to do with lwIP at all.  It's
probably the common problem of Active FTP and firewalls, where you
windows PC is not allowing the data connection to be opened.  Please
check that.

Kieran




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