to DLT_C_HDLC.
Arrange that if "map_arphrd_to_dlt()" supplies DLT_LINUX_SLL as the
link-layer DLT_ value, we capture in cooked mode.
Return DLT_LINUX_SLL for ARPHRD_PPP, as some PPP code in the kernel
supplies no link-layer header whatsoever to PF_PACKET sockets, other PPP
code supplies PPP link-layer headers ("syncppp.c"), and PPP-over-ISDN
appears to supply random link-layer headers (there's code in Ethereal,
for example, to cope with PPP-over-ISDN captures with which the Ethereal
developers have had to cope, heuristically trying to determine which of
the oddball link-layer headers particular packets have).
#5228, to correctly check for Appletalk for EtherTalk phase II - they
use 802.3 with LLC SNAP packets, rather than D/I/X Ethernet packets.
His patch made "atalk" check for Appletalk ARP as well as other
Appletalk packets; I've instead added a separate "aarp" packet type,
leaving "atalk" checking only for ETHERTYPE_ATALK, so you can check for
ETHERTYPE_ATALK, ETHERTYPE_AARP, or both.
counting any extra jumps required by a flowgraph node (the conditional
jump instructions have an 8-bit offset; if the target is more than 256
instructions away, we generate a nearby "jump always" to the target, and
jump to that instead).
letting you filter based on the VLAN to which a packet belongs, and an
improvement to the printing of VLAN packets (adding an extra space to
separate the VLAN priority and flags from the next stuff printed).
guy