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|
#!/bin/bash
hosts=(
'router 192.168.0.13'
'rpi3 192.168.1.3'
)
tmp_dir=$(mktemp -d)
trap 'rm -rf --one-file-system "${tmp_dir:?}"' EXIT
for host in "${hosts[@]}"; do
name="${host% *}"
addr="${host##* }"
printf '"%s" [fontcolor="#800000"];\n' "${name}" >> "${tmp_dir}/print-content"
ssh "${addr}" ip -o addr | \
sed -n '
s/\s*\\.*$//
s/\s\+/ /g
/ scope link/d
s/^[0-9]\+: //
/^lo /d
h
s/^\(\S\+\) .*$/'"${name}"' \1/
w '"${tmp_dir}"'/interfaces
s/^\(.\+\) \(\S\+\)$/"\0" [label = "\2", fontcolor="#00ff00"];/
w '"${tmp_dir}/print-content"'
g
s/^\(\S\+\) .*$/"'"${name}"'" -> "'"${name}"' \1";/
w '"${tmp_dir}/print-content"'
g
s/^\(\S\+\) \S\+ \(\S\+\) .*$/"'"${name}"' \1" -> "\2";/
w '"${tmp_dir}/print-content"'
g
s/^\S\+ \(\S\+\) \(\S\+\) .*$/\1 \2/
w '"${tmp_dir}"'/ips
'
for file in ips interfaces print-content; do
cat "${tmp_dir}/${file}" >> "${tmp_dir}/all-${file}"
done
ssh "${addr}" 'sudo iptables-save | sed "s/^/4 /"; sudo ip6tables-save | sed "s/^/6 /"' 2>/dev/null | \
sed '
s/^/'"${name}"' /
' >> \
"${tmp_dir}/iptables"
done
while read -r version address; do
case ${version} in
inet)
printf '"%s" [fontcolor="#000080"];\n' "${address}" >> "${tmp_dir}/adress-types"
;;
inet6)
printf '"%s" [fontcolor="#0000ff"];\n' "${address}" >> "${tmp_dir}/adress-types"
;;
esac
subnet_mask=${address##*/}
if [ -z "${subnet_mask}" ] || [ "${subnet_mask}" = "${address}" ]; then
continue;
fi
case ${version} in
inet)
printf '"%s" [fontcolor="#000080"];\n' "${address}" >> "${tmp_dir}/adress-types"
if [ "${subnet_mask}" = 32 ]; then
continue
fi
base_address=$(
sipcalc "${address}" | \
sed '
s/^Network address\s\+- \+\(\S\+\)\s*$/\1/
t
s/^Network mask (bits)\s\+- \+\([0-9]\+\)\s*$/\1/
t
d
' | \
sed '
N
s,\n,/,
'
)
;;
inet6)
if [ "${subnet_mask}" = 128 ]; then
continue
fi
base_address=$(
sipcalc "${address}" | \
sed -n '
s/^Subnet\s\+prefix\s\+(masked)\s\+-\s\+\(\S\+\)\s*$/\1/
T
s,0\(:0\)*/,:/,
p
'
)
;;
*)
continue
;;
esac
printf '%s %s\n' \
"${address}" \
"${base_address}"
done \
< "${tmp_dir}/all-ips" \
| sort -u \
| sort -k2,2 -k1,1 \
| uniq -Df1 \
| sed '
s/^\(\S\+\) \(\S\+\)$/"\1" -> "\2";\n/
' \
| tee -a "${tmp_dir}/all-print-content" \
| sed -n '
s/^".*" -> "\(\S\+\)";$/\1/
T
/:/ {
s/.*/"\0" [fontcolor="#a0a000"];/
p
}
/\./ {
s/.*/"\0" [fontcolor="#808000"];/
p
}
' \
>> "${tmp_dir}/adress-types"
cat "${tmp_dir}/adress-types" >> "${tmp_dir}/all-print-content"
grep '\S\+ [46] :FORWARD ACCEPT ' "${tmp_dir}/iptables" | \
while read -r host ipver _; do
grep "^${host} " "${tmp_dir}/all-interfaces"
done | \
sort -u > \
"${tmp_dir}/ifs-routed"
join -j1 "${tmp_dir}/ifs-routed" "${tmp_dir}/ifs-routed" \
| grep -v ' \(\S\+\) \1$' \
| sed '
s/^\(\S\+\)\( .*\)$/\1 4\2\n\1 6\2/
' \
> "${tmp_dir}/routes"
grep -vwF "$(
grep -vwF -- '-m conntrack' "${tmp_dir}/iptables" | \
grep -v '^\S\+ 4 .*/32 ' | \
grep -v '^\S\+ 6 .*/128 ' | \
sed -n '
s/^\(\S\+\) \([46]\) \(.* \)\?-A FORWARD \(.* \)\?-i \(\S\+\) \(.* \)\?-j DROP/\1 \2 \5/
T
p
'
)" "${tmp_dir}/routes" \
> "${tmp_dir}/routes.new"
mv "${tmp_dir}/routes.new" "${tmp_dir}/routes"
grep -vwF -- '-m conntrack' "${tmp_dir}/iptables" | \
grep -v '^\S\+ 4 .*/32 ' | \
grep -v '^\S\+ 6 .*/128 ' | \
sed '
s/^\(\S\+\) \([46]\) \(.* \)\?-A FORWARD \(.* \)\?-i \(\S\+\) \(.* \)\?-o \(\S\+\) \(.* \)\?-j ACCEPT/\1 \2 \5 \7/
t
s/^\(\S\+\) \([46]\) \(.* \)\?-A FORWARD \(.* \)\?-o \(\S\+\) \(.* \)\?-i \(\S\+\) \(.* \)\?-j ACCEPT/\1 \2 \7 \5/
t
d
' \
>> "${tmp_dir}/routes"
sed '
s/^\(\S\+ \S\+\) \(\S\+\) \(\S\+\)$/f \1 \2 \3\nr \1 \3 \2/
' "${tmp_dir}/routes" \
| while read -r dir host ip from to; do
printf '%s %s %s %s %s %s\n' \
"${dir}" \
"${from}" \
"${to}" \
"${host}" \
"${ip}" \
"$(
printf '%s\n' "${from}" "${to}" | \
sort | \
sha512sum | \
awk '{print $1}'
)"
done \
| sort -k2,6 -k1,1 \
> "${tmp_dir}/routes.new"
uniq -uf1 "${tmp_dir}/routes.new" | tee /dev/stderr \
| grep '^f ' \
> "${tmp_dir}/routes"
uniq -df1 "${tmp_dir}/routes.new" \
| sed 's/^[fr] /b /' \
| sort -k4,6 -k1,3 \
| uniq -f3 \
>> "${tmp_dir}/routes"
rm "${tmp_dir}/routes.new"
sed '
s/^f \(\S\+\) \(\S\+\) \(\S\+\) 4 \S\+$/"\3 \1" -> "\3 \2" [weight=0, color="#808080"];\n/
t
s/^f \(\S\+\) \(\S\+\) \(\S\+\) 6 \S\+$/"\3 \1" -> "\3 \2" [weight=0, color="#000000"];\n/
t
s/^b \(\S\+\) \(\S\+\) \(\S\+\) 4 \S\+$/"\3 \1" -> "\3 \2" [dir=both, weight=0, color="#808080"];\n/
t
s/^b \(\S\+\) \(\S\+\) \(\S\+\) 6 \S\+$/"\3 \1" -> "\3 \2" [dir=both, weight=0, color="#000000"];\n/
t
d
' "${tmp_dir}/routes" \
>> "${tmp_dir}/all-print-content"
sort -u "${tmp_dir}/all-print-content" | cat -n
{
echo 'digraph network {'
echo 'rankdir=LR;'
sort -u "${tmp_dir}/all-print-content"
echo '}'
} | \
dot -Tpng -onetwork.png
|
