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

[Pomeroy, Marty]

If the server is initiating the close, it's not an lwip issue...


-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of furiantes
Sent: Thursday, June 13, 2013 2:00 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] LPC1768/9 :: FreeRTOS 7.4 :: lwIP 1.4.1 ::TCPsend/recv

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->h
>> o
>> 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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