[ethereal-dev] bitfield changes committed

["Gilbert Ramirez Jr." <gram@xxxxxxxxxxxxxxxxxxx>]

I just now put into CVS the changes to the bit-field variables
in packet.h (igmp, ip, and tcp headers) and packet-atalk.c
ANSI allows bitfields in unsigned ints, but gcc allows them in
just about anything.

I tested the change on IP, TCP, and DDP headers, but not IGMP
since I don't have a trace with IGMP packets.

In packet.h I introduced 2 new macros, lo_nibble and hi_nibble,
which extrace the low and high nibbles from a byte. Actually,
the macros are not very fancy; they don't check to make sure you're
sending them only a byte.

In packet-atalk.c I introduced 2 new macros, ddp_len and ddp_hops,
which extract bitfields from the guint16 value.

--gilbert
-- 
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