how to organize data in Data link layer?

QNX DEVELOPERS General Programming
1

There are 7 layers in OSI structure,as I know usually we can only visit application layer,for example in TCP/IP socket use “send()” and “receive()”,but some application we need to oranize data in some layer,such as data link layer,I want to know how to write the code in QNX .

2

Xuyong,

I’d start by downloading the source code to tcpdump. That program deals with those layers.

You might also look on source force to see about downloading the QNX networking code.

Tim

3

Yes. On QNX6 I believe that tcpdump uses bpf, so you might like to google for that as well…