Re: [BUG] pcap-usb-linux.c

[Jean-Louis <jelot-tcpdump () jelot it>]

> > > Jean-Louis ha scritto:
> > > > > today I have found some bug on pcap-usb-linux.c
> > > > >
> > > > > now i can try to tell you which are

in accordance with usbmon.txt in "mmap mode" the data is at

&mmap_area[vec[i]] + 64;

rather than

&mmap_area[vec[i]] + 48;

with mmap ther'is 16Byte filled with 0 first to the real data...

so if i.e. I have caplen = 18Byte, in file.pcap I have 16Byte with 
garbage (0x00) and only 2Byte with real data other 16Byte of real data 
is lost.

the mmap mode is *default* with kernel >= 2.6.25-rc8-mm1

I'm newbie with libpcap and I don't know how I can fix that without 
degrading performance
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