controlling program with GUIProtocol problem on ARM board.

[zhy2111314]

First thanks for mldonkey on ARM. However, here we meet a strange problem as follows:
1. we use 2.9.3 on ARM from here, and sancho on x86 PC can control it well.
2. we write a controlling program named mlctl for mlnet according to the GUIProtocol of mlnet, and we want it running on the ARM board with mlnet.
3. we can not get any file info (fileinfo, downloading, downloaded) using mlctl on board to control mlnet also on board, but it's strange that we can control it with mlctl such as open, close, add a new download, etc.
4. finally, we find that it used the old GUI protocol described on wiki of mlnet to communicate with mlctl.
5. we compiled the mlctl on x86 PC and use it to control mlnet on ARM board, and it looks like well also with the latest protocol version.
6. we want to know why it is auto-changed in the different situation and according to what? and is there any document for developers like sancho to explain how to use GUI Protocol of mlnet.

Thanks very much for any reply.

[zhy2111314]

Thanks here.
We just solve this problem by substituting all the (int , (int 16), or (int 32) to memcpy(). We even do not know the exact reason, maybe something different with cross-comping chain(gcc).

[fabtar]

Don't know, for sure you need to specify int16 or int32 cause a protocol "field" has a proper size.
The int type usually has 32 bit, but it could change between implementations.
In case you need a 16 bit integer you cannot use an "int" type because you don't know the exact int size... or better ... I have reminds about using int16 - int32 is the only way in order to make network software portable(and inter-operate) between different architectures.

I Hope my thoughts make sense.
_________________
ARM,ARMEL,MIPS,MIPSEL,POWERPC mldonkey cores: http://fabtar.ygrek.org.ua/

[fabtar]

You have also to respect "network order"in data transmission.Spiralvoice olready pointend the importance of Endianess in network communications.
Endianess is important when transmitting data fields bigger than 1 byte.
_________________
ARM,ARMEL,MIPS,MIPSEL,POWERPC mldonkey cores: http://fabtar.ygrek.org.ua/

[spiralvoice]

http://mldonkey.sourceforge.net/forums/viewtopic.php?p=19130#19130