thanks Mathias, i´d like to create only one task, because only three socket i
need to read, the rest is only for answer. In my case the customer said to
me:
Requeest:
- RQ-R-1 Port Number = 1500H (=
5376 dec)
- RQ-R-2 Port Number = 1501H (=
5377 dec)
- RQ-R-3 Port Number = 1502H (=
5378 dec)
Answer:
- RP-R-1 Port Number = 1600H (=
5632 dec)
- RP-R-2 Port Number = 1601H (=
5633 dec)
- RP-R-3 Port Number = 1602H (=
5634 dec)
- the application in EVK1100 Internet
address shall be fixed to : 192.168.5.248
When i´ve received a request always i have to answerd for other socket,
example i recived RQ-R-1 and i need to answer ACK for RP-R-1.
If i use 6 task, i´ll need to syncronice, and communicate intertask, and i
not sure if that solution is more difficult. On the other hand i need to
create only task, i´ll need to accept the 6 socket connections sequentially
( the customer said me :connect sequentially (one after the other) all the
logical links.), i supossed that each accept coenction is blocking.
Then i´d like tu use (select function) for three socket to wait data
for RQ-R-1,
or RQ-R-2 or RQ-R-3, because select is a function blocking too.
I don´t know, if i can implement my idea, but i think is more easier. do you
think Mathias that my solution can be implemented?
If i can´t use this method, i ´ll need to use the six socket, i should to
create 6 task waiting for accept conecction, and then use three task to
answer (the RP-R-X) blocking with a semaphore, and the other task blocking
with a function to receive data from PC ¿lwip_recv can be used or need
another función to wait a data for PC blocking the task and let to the other
task are running? in the example
http://www.ultimaserial.com/classroom2.htmli supposed that the
while (1) always enter and no blocking the task to wait for data.
Thank again, it´s a pleasure for me your help.but i don´t knows what
implementation i should use......
Regards
Oscar
On Wed, Sep 9, 2009 at 8:15 AM, Mathias Zenger <[email protected]>wrote:
> Some thoughts:
>
> Your application should accept incoming requests so let's call it the
> server. I would suggest to start out with a single TCP connection to get
> familiar with the topic. As a simple example you could use the TCP echo
> server (socket programming) found at
> http://www.ultimaserial.com/classroom2.html
>
> What your server task basically needs:
>
> - implement a new task
> - create a socket: socket()
> - bind it to the local address: bind()
> - set socket to listen mode: listen()
> - accept incoming requests: accept()
> - answer the request: send()
>
> As soon as you get the example working you can go ahead with the other
> connections. Either you implement a seperate task for each socket you need
> or you could start more than one instance of the above task (e.g. pass the
> internet address and socket number as function parameters to your
> portTASK_FUNCTION).
>
> To get familiar with FreeRTOS I recommend to purchase and read Richard
> Barry's book (
> http://www.freertos.org/Documentation/FreeRTOS-documentation-and-book.html
> )
> Some information to get familiar with the BSD sockets interface from a link
> found at lwIP Wiki (http://docs.hp.com/en/B2355-90136/)
>
> Regards,
> Mathias
>
>
>
> -----Ursprüngliche Nachricht-----
> *Von:* [email protected] [mailto:
> lwip-users-bounces+m.zenger <lwip-users-bounces%2Bm.zenger>=mobatime.com@
> nongnu.org]*Im Auftrag von *Oscar F
> *Gesendet:* Dienstag, 8. September 2009 20:12
> *An:* Mailing list for lwIP users
> *Betreff:* [lwip-users] Re: More help with socket
>
> The second part is not correct because always my task have the control and
> another task never enter.
> can i use the select option? with TCP connection and another idea to listen
> about three socket and blocking while there isn´t data?
>
> Thanks again
> Oscar
>
>
>
> On Tue, Sep 8, 2009 at 7:59 PM, Oscar F <[email protected]> wrote:
>
>> I know more data about the application. The connection is TCP, and i have
>> to open 6 socket, all of them unidirectional , 3 for request and 3 for
>> response.
>> Logical links connection sequence
>>
>> logical links connection process shall be initiated by the PC unit: it
>> will connect sequentially (one after the other) all the logical links.
>>
>> At power-on/reset, the EVK1100 application shall first create the sockets
>> in order to be ready for accepting a connection in all of them.
>>
>>
>> my first question is the function accept is blocking the code, because
>> i´ll do of this way
>>
>>
>> -createsockets( ) (the six socket)
>>
>> -bind( ) the six socket
>>
>> -listen ( ) the six socket
>>
>>
>> and then
>>
>> do {
>>
>>
>> -accept ( ) for socket one
>>
>> if the answer is OK
>>
>> -accept () for the second one
>>
>> if the answer is OK
>>
>> ...
>>
>> -accept () for the six one
>>
>> if the answer is OK then fin=true
>>
>>
>>
>> }while (fin)
>>
>>
>>
>>
>> is that correct?
>>
>>
>> the next step is listen for 3 socket to request and this is my idea:
>>
>>
>>
>> do{
>>
>>
>> if recv(socke1)
>>
>> {
>>
>> //process
>>
>>
>> }
>>
>>
>> if recv(socket2)
>>
>> {
>>
>> //process
>>
>>
>> }
>>
>>
>>
>> if recv(socket3)
>>
>> {
>>
>> //process
>>
>>
>> }
>>
>>
>>
>> }while (fin2)
>>
>>
>> is a good idea?
>>
>>
>> thanks for all
>>
>> Oscar
>>
>>
>
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> lwip-users mailing list
> [email protected]
> http://lists.nongnu.org/mailman/listinfo/lwip-users
>
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