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

[Furiantes]

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->host_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....