Can I make such non blocking read with already established connection? Regards, Krzysztof Wesolowski,
On Thu, Apr 12, 2012 at 2:03 PM, <[email protected]> wrote: > Send lwip-users mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.nongnu.org/mailman/listinfo/lwip-users > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of lwip-users digest..." > > > Today's Topics: > > 1. Detecting remote close when using netconn API > (Krzysztof Weso?owski) > 2. Re: Detecting remote close when using netconn API (Kieran Mansley) > 3. tcp_sndbuf return 0 when sending file (vincent cui) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 12 Apr 2012 00:44:48 +0200 > From: Krzysztof Weso?owski <[email protected]> > To: [email protected] > Subject: [lwip-users] Detecting remote close when using netconn API > Message-ID: > <caprkjpbmoltt5jbzrpke25_ac1pwc8pnkcd220nlrarwacp...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-2 > > Hi, > > I am using netcon api in simple application. Device is a server > processing connections in loop, PC is a client. After PC establishes > connection we go into simple loop: > > while (err == ERR_OK) { > if (streaming_enabled()) { > err = netconn_write(pc,sbuf, 1152, NETCONN_COPY); > } > vTaskDelay(1); > } > > where pc is struct netconn *. > > However if streaming is disabled, there is now way we can detect that > PC sent FIN and closed connection - so subsequent connection to same > port to server causes RST (we are still in inner loop so we cannot > accept next connection). > > What can i do to detect that PC closed connection? I do not mean > Ethernet layer error and other "hard do diagnose in few miliseconds" > problems, rather typical situation with connection closed by PC. > > Regards, > Krzysztof Weso?owski, > > > > ------------------------------ > > Message: 2 > Date: Thu, 12 Apr 2012 09:44:45 +0100 > From: Kieran Mansley <[email protected]> > To: Mailing list for lwIP users <[email protected]> > Subject: Re: [lwip-users] Detecting remote close when using netconn > API > Message-ID: > <[email protected]> > Content-Type: text/plain; charset="UTF-8" > > On Thu, 2012-04-12 at 00:44 +0200, Krzysztof Weso?owski wrote: >> What can i do to detect that PC closed connection? > > The simplest way would be to do a non-blocking read from the connection. > If the PC has closed it in that direction, you will get an error. > > Kieran > > > > > ------------------------------ > > Message: 3 > Date: Thu, 12 Apr 2012 07:09:48 +0000 > From: vincent cui <[email protected]> > To: Mailing list for lwIP users <[email protected]> > Subject: [lwip-users] tcp_sndbuf return 0 when sending file > Message-ID: > <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > All > > I develop a FTP server with lwIP 1.3.2 in Cortex M3 platform, when I use > FlashFXP to get file from the server, the tcp_sndbuf always return 0 after > work a while . > I capture it with wireshark, the file is attached file. The server ip: > 192.168.1.51. it seems that transfer error and need retransmission. > > [Untitled.png] > > My sendcode in server is below: > > static void send_data(struct tcp_pcb *pcb, struct ftpd_datastate *fsd) > { > err_t err; > u16_t len; > int i; > if (sfifo_used(&fsd->fifo) > 0) > { > if (tcp_sndbuf(pcb) < sfifo_used(&fsd->fifo)) > { > len = tcp_sndbuf(pcb); -> the len is set 0 after work a while. > } > else > { > len = (u16_t)sfifo_used(&fsd->fifo); > } > > i = fsd->fifo.readpos; > if ((i + len) > fsd->fifo.size) > { > err = tcp_write(pcb, fsd->fifo.buffer + i, (u16_t)(fsd->fifo.size > - i), 1); > if (err != ERR_OK) > { > return; > } > len -= fsd->fifo.size - i; > fsd->fifo.readpos = 0; > i = 0; > } > err = tcp_write(pcb, fsd->fifo.buffer + i, len, 1); > if (err != ERR_OK) > { > return; > } > fsd->fifo.readpos += len; > } > } > > Who know how to solve ? > Vincent Cui > Software Engineer Leader > Mobile: +8613255150315 > Tel: +86 21 34612525x6104 > Fax: +86 21 34619770 > E-Mail: [email protected]<mailto:[email protected]> > Shanghai EnLogic Electric Technology Co., Ltd. > Address: 1104-1106, Building A, No.391, Guiping Road, Xuhui District, > Shanghai, 200233 > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.nongnu.org/archive/html/lwip-users/attachments/20120412/fb6e52a1/attachment.html> > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: image001.png > Type: image/png > Size: 27828 bytes > Desc: image001.png > URL: > <http://lists.nongnu.org/archive/html/lwip-users/attachments/20120412/fb6e52a1/attachment.png> > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: sendfileerror.pcap > Type: application/octet-stream > Size: 1348287 bytes > Desc: sendfileerror.pcap > URL: > <http://lists.nongnu.org/archive/html/lwip-users/attachments/20120412/fb6e52a1/attachment.obj> > > ------------------------------ > > _______________________________________________ > lwip-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/lwip-users > > End of lwip-users Digest, Vol 104, Issue 6 > ****************************************** _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
