Alejandro
2010/5/11 Alejandro Casagrande <casagrande...@gmail.com>
> German, to not receive 3 times the same packet you should try to bind to an
> IP of the interface that will listen from Device A.
>
Im doing this, and dont work for the reason lucas exposed, check the
previous poost from lucas.
> If you want to use 0.0.0.0 you should filter by code the incoming packets
> and discard repeated packets. You can try with the GetRemoteSinIP property
> to filter packets.
>
>
The problem is not more than a remote ip sending data, it never was. I have
a unique device (IP) sending data. The problem is the data is sended as UDP
BROADCAST, then the destination listen for every IP a package (i have 3 ips
on the same machine).
> I'm using synapse UDP, but when sending data I connect to an IP ended with
> 255:
>
> FUDPSockettoSend := TUDPBlockSocket.Create();
> FUDPSockettoSend.Connect('192.168.0.255','4000');
>
> and in the listening peer (assuming that 192.168.0.45 is local IP):
>
> FUDPSockettoListen := TUDPBlockSocket.Create();
> FUDPSockettoListen.Bind('192.168.0.45','4000');
>
>
That work because is a different situation.
Thanks.
> Hope this can help
>
> Best regards
>
> --
> Ing. Alejandro Casagrande
> Advenio Software
> http://www.advenio.com.ar
>
> 2010/5/11 German Gentile <german.gent...@petrobox.net>
>
> 2010/5/11 Lukas Gebauer <gebyl...@mlp.cz>
>>
>> It's looks like Device A sending datas by a broadcast instead of
>>> unicast to your IP address.
>>>
>>>
>> As i'm not setting any IP on device A, i bet you are rigth.
>>
>>
>>> If device send unicast to a one IP address, then it cannot be readed
>>> by other local IP addresses! Only destination IP interface can see
>>> this UDP packet.
>>>
>>> It is possible only when you are reading broadcast. Broadcast can be
>>> readed by all interfaces who see broadcast message. (If it is network
>>> broadcast, then it can see by all interfaces within same IP network.)
>>> And broadcasts are readable only when you is binded to 0.0.0.0.
>>>
>>> When you bind to some specific local IP, then you cannot read
>>> broadcasts. You can read only unicast packets what is delivered to
>>> your binded IP adddress. But you see no packet.
>>>
>>
>> Ok, i undesrtand this. Question. Is possible to set 0.0.0.0 and then apply
>> a FILTER to the package for IP to restrict what packages to read?
>> I mean , some way to avoid getting 3 packages, all the time.
>>
>> If don't, theres any place where i can get the 3 packages at the same
>> time? On this place i can just filter for repeated packages, you know.
>>
>> Best regards.
>>
>>
>>> So, I think, Device A not using unicast to your IP, but sending datas
>>> by a broadcast. Or some crappy software hooks your winsock interface
>>> (firewall, antivirus,...)
>>>
>>>
>>> --
>>> Lukas Gebauer.
>>>
>>> http://synapse.ararat.cz/ - Ararat Synapse - TCP/IP Lib.
>>> http://geoget.ararat.cz/ - Geocaching solution
>>>
>>>
>>>
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>>
>>
>>
>> --
>> German Pablo Gentile
>> CTO - Dpto. de Desarrollo y Tecnología.
>> PetroBox Internacional
>> Fabricantes de la línea de productos
>> PetroBox y PetroTruck
>> http://www.petrobox.net
>> german.gent...@petrobox.net
>> (Oficinas Colombia)
>> (57) 5-4222465
>> (57) 3017258189
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>> (591) 75361612
>> (HQ Argentina)
>> (5411) 4524-0297
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>>
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--
German Pablo Gentile
CTO - Dpto. de Desarrollo y Tecnología.
PetroBox Internacional
Fabricantes de la línea de productos
PetroBox y PetroTruck
http://www.petrobox.net
german.gent...@petrobox.net
(Oficinas Colombia)
(57) 5-4222465
(57) 3017258189
(Bolivia)
(591) 75361612
(HQ Argentina)
(5411) 4524-0297
(54911) 3838-4749
(54911) 5701-0304
MSN gentileger...@hotmail.com
Google Talk germanpablogent...@gmail.com
skype(VoIP) germanpablogentile
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