little indian or big indian?

Massimiliano Conte

hi all! does anyone knows if there is a "strong" specification on sending numeric data using TCP/IP protocol? Do i HAVE TO send any integer in my structs in any specific byte-order? thanks all! :)

toxcct

use these : htons()[^] htonl()[^] ntohs()[^] ntohl()[^]

TOXCCT >>> GEII power

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led mike

JonathanLivingstone wrote:

Do i HAVE TO send any integer in my structs in any specific byte-order?

Only if you want it to work correctly! http://en.wikipedia.org/wiki/Endianness[^]

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led mike

Michael Dunn

If you control both the sending and receiving programs, then no. Bytes are just bytes. Where endian-ness comes into play is when you're using the low-level socket APIs, where the structs require integers to be in network byte order. If you don't control the receiving end, then follow whatever data format it's expecting.

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Jun Du

JonathanLivingstone wrote:

little indian or big indian?

I thought you guys are talking about Little India Town, like Little Italy or Korea Town, in Toronto :-D

Best, Jun

_AK_

And I am still confused.. :-D

Best Regards, Apurva Kaushal

led mike

uh? endianness is a platform issue not an application "control" issue. :confused:

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led mike

Michael Dunn

The OP asked whether he has to send his own data in a particular endian order. The answer is no, his data is just bytes to the network stack, endian-ness doesn't enter into play at that high a level.

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led mike

Michael Dunn wrote:

The OP asked whether he has to send his own data in a particular endian order.

I don't know that that is supposed to mean but here is what he asked:

JonathanLivingstone wrote:

sending numeric data using TCP/IP protocol? Do i HAVE TO send any integer in my structs in any specific byte-order?

and the answer is "yes". integers are multi-byte width and therefore byte order is significant for TCP/IP.

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led mike

iqazi

u made me laugh..thankss

ihtesham