Hi, I had the same problem you have now, and suggest you to read my topic here called "lwIP malloc fail". I had to send in a HTTP website a large package (a download).
But the first question I would ask you is: do you try to send all the packages inside the tcp_recv callback function? If you do so, the lwIP buffers will not be freed and the memory will lack in a few sent packages. The solution I found is explained in the topic. Regards, Pedro Paulo. ----- Original Message ----- From: Damon, Antoine To: Mailing list for lwIP users Sent: Thursday, May 06, 2010 4:53 AM Subject: [lwip-users] LWIP configuration large packet size Hi I use LWiP for my project. I run the stack on an embedded board (with blackfin BF527 processor). I use the webserver too. I have created a webpage which is located on my webserver. I would like to use this webpage to show some dynamic data. I couldn't send some big packets. After two segments, the stack send an acknowledge of the end of transmission. On my webpage, I get the data with the command xmlhttprequest. I copy hear the main lines I could see with the sniffer Wireshark 192.168.1.1 192.168.1.11 HTTP GET /polyline_c.xml HTPP/1.1 192.168.1.11 192.168.1.1 TCP TCP segment of reassembled PDU 192.168.1.11 192.168.1.1 TCP TCP segment of reassembled PDU 192.168.1.1 192.168.1.11 TCP vaultbase > http [ACK] seq=444 Ack=1111 win =64425 len=0 192.168.1.11 192.168.1.1 TCP http> vaultbase [FIN,ACK] Seq=1111 ack=444 Win=8192 Len=0 .. I configured the TCP IP stack to accept the large packet size (file lwipopts.h), but this change nothing. After the transmission of two segments, the transmission is closed. I attached the file of trace and the file of the Stack configuration. Thanks for your help. Best regards. Antoine Damon DSP Software Designer Tel: +33.2.4360.0044 Fax: +33.2.4360.2870 FAURE HERMAN * * * * * * * * * * * * * This e-mail is intended solely for the intended recipient or recipients. If this e-mail is addressed to you in error or you otherwise receive this e-mail in error, please advise the sender, do not read, print, forward or save this e-mail, and promptly delete and destroy all copies of this e-mail. This email may contain information that is confidential, proprietary or secret and should be treated as confidential by all recipients. This e-mail may also be a confidential attorney-client communication, contain attorney work product, or otherwise be privileged and exempt from disclosure. If there is a confidentiality or non-disclosure agreement or protective order covering any information contained in this e-mail, such information shall be treated as confidential and subject to restriction on disclosure and use in accordance with such agreement or order, and this notice shall constitute identification, labeling or marking of such information as confidential, proprietary or secret in accordance with such agreement or order. The term 'this e-mail' includes any and all attachments. * * * * * * * * * * * * * ------------------------------------------------------------------------------ _______________________________________________ lwip-users mailing list lwip-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/lwip-users __________ Informação do ESET NOD32 Antivirus, versão da vacina 4628 (20091122) __________ A mensagem foi verificada pelo ESET NOD32 Antivirus. http://www.eset.com
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