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|
#!/bin/sh
# @(#) $Header: arp2ethers,v 1.2 94/03/29 02:44:44 leres Exp $ (LBL)
#
# Convert arp.dat to ethers format
#
# - sort on timestamp, newest first
# - discard entries without simple hostnames
# - discard all but first occurance of each ethernet address
# - discard entires with raw ip addresses for simple names
# - remove ip address and timestamp fields
# - append "-ip" to hosts with decnet address too
# - append "-old", "-old1", etc. as necessary
# - sort
#
# 1999-04-12 KELEMEN Peter <fuji@debian.org>
# Use sh(1) instead of csh(1).
#
# 2000-03-21 Erik Warmelink <erik@selwerd.nl>
# Use next instead of continue in included p.awk.
sort +2rn arp.dat | \
awk 'NF == 4 { print }' | \
# 1999-04-12 KELEMEN Peter <fuji@debian.org>
# awk -f p.awk | \
awk '
# Only print the first ethernet address seen
{
e = $1
if (seen[e])
next
seen[e] = 1
print $0
}
' | \
egrep -v '\.[0-9][0-9]*$' | \
sed -e 's/ .* / /' | \
# 1999-04-12 KELEMEN Peter <fuji@debian.org>
# awk -f d.awk | \
awk '
# DECnet hacking
BEGIN {
n = 0
sdecnet = "aa:0:4:"
ldecnet = length(sdecnet)
}
{
++n
e[n] = $1
h[n] = $2
if (sdecnet == substr($1, 1, ldecnet))
decnet[$2] = 1
}
END {
for (i = 1; i <= n; ++i) {
if (decnet[h[i]] && sdecnet != substr(e[i], 1, ldecnet))
h[i] = h[i] "-ip"
print e[i] "\t" h[i]
}
}
' | \
# 1999-04-12 KELEMEN Peter <fuji@debian.org>
# awk -f e.awk | \
awk '
# Add -old suffix to ethers file, as required. Assumed sorted input
{
if (!seen[$2]) {
seen[$2] = 1
print
next
}
h = $2 "-old"
s = h
for (n = 1; seen[h]; ++n)
h = s n
seen[h] = 1
print $1 "\t" h
next
}
' | \
sort
|
