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Re: [lwip-users] LPC1768/9 :: FreeRTOS 7.4 :: lwIP 1.4.1 :: TCPsend/recv
From: |
Pomeroy, Marty |
Subject: |
Re: [lwip-users] LPC1768/9 :: FreeRTOS 7.4 :: lwIP 1.4.1 :: TCPsend/recv |
Date: |
Thu, 13 Jun 2013 13:20:10 -0400 |
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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