Instead of having the Ethernet-type handler process the VLAN and Alteon
jumbo frame Ethernet type values, process them in the Ethernet (and
Linux cooked-mode) dissectors. This makes it easier for the right MAC
addresses to be printed for those packets.
As part of that, rename ether_encap_print() to ethertype_print() - it
doesn't print encapsulated Ethernet frames, it prints payloads whose
packet type is indicated by an Ethernet type field value - and remove
the no-longer-needed "extracted Ethernet type" argument. That also lets
us eliminate it from the SNAP print routine.
Make ether_print() take a function, and an argument to pass to that
function, as parameters, so that, for example, the ATM LANE printer can
use it and put the LEC ID into the link-layer headeer printout.
Use the EXTRACT_ macros to extract multi-byte integral values from
packets, rather than just dereferencing pointers into the packet; there
is no guarantee that the packet data will be aligned on the right
boundary, and there is no guarantee that, if they're not, a direct
access will work correctly.
link-layer print routines if no other print routine claimed the packet.
Test whether that flag is set rather than testing whether neither of -x
or -q were specified, and have -x, -q, *and* -X set that flag, so that
-X suppresses it just as -x does. That way you don't get those pckets
dumped twice if -X was specified.
