|
From: | Justin Bayles |
Subject: | Re: [lwip-users] Problems with ASSERTION in tcp_in and tcp_out |
Date: | Fri, 11 Jun 2004 10:59:33 +1000 |
Hi Leon, I am using the 0.7.2 release to do a win32 port.I am using the slip interface with Named Pipes as the physical layer. Each netif connects to the Named Pipe Server. The Named Pipe Server is a separate process that creates a thread to listen to each pipe. When a full slip packet arrives, the thread transmits the slip packet down every pipe except the pipe that the packet came from. The write is protected by a semaphore so that pipes will only ever receive one slip packet at a time. This has no effect on the lwip stack. It emulates a shared transmission medium.
I have a read process that listens for incoming connection requests, connects, receives data and prints it to stdout. The read process has three threads running: the tcpip thread, the slipif thread and the main thread. The tcpip thread is generated by lwip. The slipif thread reads bytes from the serial interface (pipe), and forwards complete slip packets to the ip layer. The main thread is an infinite loop on netconn_recv, netbuf_data, netbuf_delete etc.
I have a write process that connects to the read process and sends packets every half a second using netconn_write. The write process also has three threads running: the tcpip thread, the slipif thread and the main thread.
Sometime I get up to 250 successful transmissions before the ASSERTION in tcp_out or tcp_in is called. I think I have a re-entrancy problem.
Thanks, Justin
From: Leon Woestenberg <address@hidden> Reply-To: Mailing list for lwIP users <address@hidden> To: Mailing list for lwIP users <address@hidden> Subject: Re: [lwip-users] Problems with ASSERTION in tcp_in and tcp_out Date: Thu, 10 Jun 2004 18:54:00 +0200 Hello Justin, Justin Bayles wrote:I am having trouble with the following assertions:"Assertion "tcp_enqueue: valid queue length" failed at line 139 in .\src\core\tcp_out.c""Assertion "tcp_receive: valid queue length" failed at line 801 in .\src\core\tcp_in.c"Could people please suggest some possible solutions to these errors? I have read previous posts from the archive on this topic however they have not helped.Could you mention the version of lwIP you are using? As well as some details on your application. Regards, Leon. _______________________________________________ lwip-users mailing list address@hidden http://lists.nongnu.org/mailman/listinfo/lwip-users
_________________________________________________________________What's your house worth? Click here to find out: http://www.ninemsn.realestate.com.au
[Prev in Thread] | Current Thread | [Next in Thread] |