That's the point. But to unpack a packet, we have to know exactly its format. Hope someone can tell what format of the packet is. And what information can we get from the packets.
Thanks everybody =^D Mason-29 wrote: > > Quoting "Y. Zhuang" <[EMAIL PROTECTED]>: > >> Thanks very much for help. So "@qHBB" and "@qHbB" actually mean the >> format that we should unpack this string, right? What is the >> differences between "@qHBB" and "@qHbB" then? and "@BBBBBB"? >> >> Thank you >> > > Yes. Basically, to summarize the python doc I linked, if you have > binary data stored in a string you want to decode, each character in > the python format string corresponds to one or more of the bytes in it > (with the exception of the @ at the beginning. @ tells the byte order > and alignment to use -- the system default in this case). Then q would > be a long long, H an unsigned short, and B being an unsigned char. > Also, @BBBBBB can be written as @6B, and you can construct the > formatting strings dynamically if needed (if transmitting a variable > length packet). > > The difference between qHbB and qHBB is that the lowercase b in > the middle is signed and the capital B is unsigned. (i.e. is the > number stored in two's-complement.) Of course, what that means for the > code is up to the coder. > > --Mason > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/bbn_80211b_rx.py%3A-how-is-the-received-packet-handled-please--tp18720769p18724417.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
