Libpcap Expression
Using BPF:(1) AIX 4.x's version of BPF is undocumented and somewhat unstandard; thecurrent BPF support code includes changes that should work aroundthat; it appears to compile and work on at least one AIX 4.3.3machine.Note that the BPF driver and the '/dev/bpf' devices might not existon your machine; AIX's tcpdump loads the driver and creates thedevices if they don't already exist. Our libpcap should do thesame, and the configure script should detect that it's on an AIXsystem and choose BPF even if the devices aren't there.Also note that tcpdump binary compiled on AIX 4 may have a problemdoing the initial loading of the BPF driver if copied to AIX 5 andrun there (GH #52).