On Nov 4, 2003, at 5:08 PM, [EMAIL PROTECTED] wrote:
I download and built tcpdump 3.7.2 and libpcap 0.7.2 on AIX 4.3 using BPF.
The bpf_open() call failed with errno 6 No such device or address for
device /dev/bpf0. However, if I just run once the tcpdump program came with
the OS in /usr/sbin directory then from that point on my built tcpdump work
without any problem. It seems that I must run the tcpdump came with the AIX
once every time system is IPL'ed.
Welcome to the wonderful world of AIX.
The /dev/bpf devices appear to be removed, and not re-created, on a reboot. AIX's tcpdump appears to load the BPF driver if it's not already loaded and create the devices if they don't already exist.
The 3.7.2 tcpdump and 0.7.2 libpcap don't do that, so you have to run some other program to load the driver and create the devices after a reboot.
The current CVS version of tcpdump.org libpcap, however, includes code from Shaun Clowes to load the driver and create the devices, so tcpdump - or any other program built with the current CVS version of libpcap - will, when asked to capture, load the driver and create the devices if necessary (and if run by root - other users probably don't have permission to do so).
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