Problems with Winsock API calls

Hi,

    I'm implementing, and it's almost ready, datagram sockets support (aka
UDP), for Dolphin XP 5.1.4.

   All the API calls works fine, there is just one with which I cannot find
what's going wrong, because the result is an standard error result, and I
have no more information that this result (-1).

    The Socket method is:

DatagramSocket>>receiveDatagram: aByteArray withSenderDo: aBlock
     "Receive aByteArray from message queue, if the reception completes
successfully, executes aBlock with the receiver datagram, and the
SOCKADDR_IN of the datagram sender as arguments."

 | remoteSocketAddress result |
 remoteSocketAddress := SOCKADDR_IN new.
 result := WSockLibrary default
    recvfrom: self asParameter
    buf: aByteArray
    len: aByteArray size
    flags: 0
    from: remoteSocketAddress asParameter
    fromlen: remoteSocketAddress size.

 result = -1
  ifTrue: [self error]
  ifFalse: [aBlock value: remoteSocketAddress value: aByteArray]

What the API funcion does is put in aByteArray the datagram's bytes, and in
remoteSocketAddress complete the SOCKADDR_IN structure with the information
of the datagram sender (IN_ADDR, port and protocol family).

remoteSocketAddress should be a pointer to a SOCKADDR_IN structure, but as i
understand, it is.

I can't make it work, but if I call it with the from and fromlength zero'ed
it works fine:

WSockLibrary default recvfrom: self asParameter
     buf: aByteArray len: aByteArray size
     flags: 0
     from: 0
     fromlen: 0.

It retrieves the datagram, pero is functionally similar to
"WSockLibrary>>recv:buf:len:flags:", and doesn't retrieves the sender
address of the datagram sender, being unable to answer back to the sender.

I've looked in SDK, and in other implementations (C, C++), and to me it
should work with no errors.

--
Esteban A. Maringolo

Hello,

"Esteban A. Maringolo" <[hidden email]> escribió en el mensaje
news:<40c5f8b1$[hidden email]>...

>     I'm implementing, and it's almost ready, datagram sockets support (aka
> UDP), for Dolphin XP 5.1.4.

The solution was passing anSDWORD as the 'fromlen' argument of the api call.


--
Esteban.

Esteban,

Dmitry Zamotkin wrote a UDP package and posted it to c.l.s.d. some time ago.
Take a look at the
following thread - maybe it helps:
http://groups.google.com/groups?hl=de&lr=&ie=UTF-8&threadm=9nt2r1%24m53%241%40news.demos.su&rnum=2&prev=/groups%3Fq%3DUDP%2Bgroup:comp.lang.smalltalk.dolphin%26hl%3Dde%26lr%3D%26ie%3DUTF-8%26group%3Dcomp.lang.smalltalk.dolphin%26selm%3D9nt2r1%2524m53%25241%2540news.demos.su%26rnum%3D2

CU,

Udo



"Esteban A. Maringolo" <[hidden email]> schrieb im Newsbeitrag
news:40c5f8b1$[hidden email]...
> Hi,
>
>     I'm implementing, and it's almost ready, datagram sockets support (aka
> UDP), for Dolphin XP 5.1.4.
>
>    All the API calls works fine, there is just one with which I cannot
find in
> remoteSocketAddress complete the SOCKADDR_IN structure with the
information
> of the datagram sender (IN_ADDR, port and protocol family).
>
> remoteSocketAddress should be a pointer to a SOCKADDR_IN structure, but as
i
> understand, it is.
>
> I can't make it work, but if I call it with the from and fromlength
zero'ed