On Mon, Mar 05, 2001 at 12:43:06AM -0600, Hal Snyder wrote:
> 1. Do bpfattach using DLT_HDLC rather than DLT_PPP_SERIAL in
> /usr/src/sys/dev/pci/if_lmcvar.h. I also have heavily patched the rest
> of the lmc driver to support LMC1200P - will be submitting to netbsd.org.
Note that if you can support both PPP and Cisco HDLC on that card, you
can, I think, use "bpf_change_type()" to change the BPF type to match
the current encapsulation.
> 2. Make new tcpdump using sources later than Thu Mar 1 15:13:31 2001
> UTC to pick up hdlc changes by itojun.
Presumably referring to the NetBSD libpcap and tcpdump rather than the
tcpdump.org ones - there's no DLT_HDLC support, at present, in the
tcpdump.org ones, but there is in the NetBSD ones.
The tcpdump.org ones should probably treat DLT_HDLC as equivalent to
DLT_C_HDLC (the latter is what BSD/OS called it; libpcap 0.5 called it
DLT_CHDLC, and I'm assuming, perhaps incorrectly that they're the same,
i.e. that the link header is a Cisco HDLC header as described in
section 4.3.1 of RFC 1547 - itojun picked up the tcpdump.org
"print-chdlc.c", so it sounds as if that's the case).
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