Re: [lwip-users] LPC1768/9 :: FreeRTOS 7.4 :: lwIP 1.4.1 :: TCPsend/recv

[furiantes]

Actually i have (and trying with)

Connection: Keep-Alive

As I wrote down. The problem it seems that server after sending full of 
data (all packets) just send a FIN, ACK which is closing conn, so than i 
cant do netconn_write anymore.

As i sad i tried with Connection: Keep-Alive etc. but it just do not 
work ok. I don't know where is the bug at me or at lwIP how it's 
working. Becouse my server it's ok, today it was tested with TCP/IP tool 
and Keep-Alive it's working just fine.

Thank you Marty for help!

Regards,
Danijel

Dne 13.6.2013 19:20, piše Pomeroy, Marty:
> You have "Connection: Close" in your request string.  Doesn't that tell the 
> server to close the socket?
>
>
> -----Original Message-----
> From: address@hidden [mailto:address@hidden On Behalf Of Furiantes
> Sent: Thursday, June 13, 2013 4:10 AM
> To: address@hidden
> Subject: Re: [lwip-users] LPC1768/9 :: FreeRTOS 7.4 :: lwIP 1.4.1 :: 
> TCPsend/recv
>
> Hello,
>
> after sometime of debug, i saw:
>
> - Server send FIN, ACK after sending the packet
> - which cause the connection to go to state CLOSE_WAIT
> - after that i can't write to tcp_write, device dont send any more request to a 
> server becouse of state CLOSE_WAIT
>
> So how to keep things alive, i tried with Keep-Alive (enabling on device
> + sending request with Connection: Keep-Alive).
>
> So how I can maintain connection, to be able to send/recieve multiple times ?
>
> If anybody can please help.
>
> Regards,
> Danijel
>
>
> Dne 10.6.2013 10:38, piše Furiantes:
> > Hello,
> >
> > i have one more problem. My goal is:
> >
> > - connect to server
> >
> > loop
> > - send request (get request like
> > /my_php?dataFrom=[something]&dataTo=[something])
> > - and wait for response
> > while(some termination)
> >
> > I did this (code below), but a second request is never sent to server.
> > First request id OK, i get the data in processes it ok. But at the
> > second request, netconn_write it seems it never send it to a server
> > anything (i watch with WireShark).
> >
> > I tried to connect/disconnect, close - connect, but nothing worked.
> >
> > So if please can anybody tell the correct procedure to send/recieve
> > data TCP connection.
> >
> > Thanks to anybody who will even read it.
> >
> > Dan
> >
> >
> >
> > resultCon = netconn_connect(xNetConn, &remote_ip,
> > cdata->host_port_number );
> >
> > downloadBlock:
> > xNetConn->recv_timeout = 30000;
> >
> > sprintf(request_my_c, "GET /my_php/data.php?startB=%d&lenB=%d
> > HTTP/1.1\r\nAccept: */*\r\nAccept-Language: sl\r\nUser-Agent:
> > Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)\r\nHost:
> > %d.%d.%d.%d:%d\r\nConnection: Close\r\n\r\n\0",
> > transData,transDataLen,cdata->host_add[0],cdata->host_add[1],cdata->ho
> > st_add[2],cdata->host_add[3]
> > , cdata->host_port_number);
> >
> >
> > netconn_write(xNetConn, request_my_c, strlen(request_my_c),
> > NETCONN_COPY);
> >
> > while (1)
> > {
> >
> > resultRecv = netconn_recv(xNetConn, &buf);
> >
> > //process data
> > //all blocks downloaded -> break
> > //goto another block;
> >
> > }
> >
> > some code....
>
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