Am 06.02.2012 um 23:13 schrieb Eagle Offshore:
> Thanks, I found this but it pretty well ignores UDP other than mentioning it
> exists.
>
I think you might confuse the host and port portions of it. If you use
socket receiveDataInto:fromHost:port:
then the host and the port are the ones of the sending side. You need to
specify your own side as well
| localPort sourceAddress sourcePort buffer receivedBytes socket delay |
localPort := 5000.
sourceAddress := NetNameResolver addressFromString: '255.255.255.255'.
sourcePort := 4848.
buffer := ByteArray new: 1000.
delay := Delay forMilliseconds: 50.
socket := Socket newUDP setPort: localPort.
[[ receivedBytes := socket receiveDataInto: buffer fromHost: sourceAddress
port: sourcePort.
receivedBytes isZero ] whileTrue: [ delay wait ]]
ensure: [ socket closeAndDestroy].
Or you are better off testing it by using #receiveDataInto: instead of
#receiveDataInto:fromHost:port:
Norbert
>
> On Feb 6, 2012, at 1:38 PM, jannik.laval wrote:
>
>> Hi Todd,
>>
>> The socket chapter in writing progress could help you:
>> https://gforge.inria.fr/scm/viewvc.php/*checkout*/PharoByExampleTwo-Eng/Sockets/Sockets.pdf?root=pharobooks
>> I do not remember if the receiveData method is blocking. If not, you should
>> wait til data arrives.
>>
>> Cheers,
>> Jannik
>>
>> On Feb 6, 2012, at 22:22 , Eagle Offshore wrote:
>>
>>> I'm trying to build a display for some instruments that multicast readings
>>> using UDP. I started out using CocoaAsyncSocket on Mac
>>> (https://github.com/robbiehanson/CocoaAsyncSocket) and I have to say it has
>>> a really wonderful api - would be worth cloning it.
>>>
>>> However, want to do the same thing in Pharo so I have typed this little
>>> snippet into the workspace:
>>>
>>> [| socket |
>>> socket := Socket newUDP.
>>> 10 timesRepeat: [| s |
>>> s := String new.
>>> socket receiveDataInto: s fromHost: (NetNameResolver
>>> addressFromString:'255.255.255.255' ) port: 4848.
>>> Transcript show: s.]] fork
>>>
>>> and it doesn't seem to do anything.
>>>
>>> What have I missed? Pharo 1.3 stable on SnowLeopard BTW.
>>>
>>> Thanks,
>>> -Todd Blanchard
>>>
>>
>> ---
>> Jannik Laval
>>
>>
>
>
