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Experimental ipv6 in wireguardConfigGenerator.sh

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This commit is contained in:
Stephen Seo 2024-02-17 15:29:07 +09:00
parent 105413e533
commit e682a003ff
1 changed files with 34 additions and 6 deletions
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40
wireguardConfigGenerator.sh
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@ -19,6 +19,7 @@ function print_help {
echo "-o <directory> - output dir to place configs (required)"
echo "-u <subnet> - subnet to use (default 24). Mutually exclusive with \"-c\""
echo "-f <ipv4_fourth> - must use with \"-u\" to set partial fourth byte"
echo "-x <ipv6_template> - set template, \"x\" will be replaced (must be last)"
}
WGNAME="wg$(date | sha1sum | head -c 8)"
@ -35,9 +36,10 @@ WG_SUBNET=24
CLIENT_COUNT_SET=0
WG_SUBNET_SET=0
IPV4_FOURTH_SET=0
IPV6_TEMPLATE="fc00::x"
# OPTARG
while getopts 'hn:c:s:i:e:p:ko:u:f:' opt; do
while getopts 'hn:c:s:i:e:p:ko:u:f:x:' opt; do
if [ "$opt" == "?" ]; then
print_help
exit 1
@ -82,6 +84,8 @@ while getopts 'hn:c:s:i:e:p:ko:u:f:' opt; do
elif [ "$opt" == "f" ]; then
IPV4_FOURTH="$OPTARG"
IPV4_FOURTH_SET=1
elif [ "$opt" == "x" ]; then
IPV6_TEMPLATE="$OPTARG"
fi
done
@ -101,6 +105,12 @@ elif (( $CLIENT_COUNT_SET )) && (( $WG_SUBNET_SET )); then
elif (( $IPV4_FOURTH_SET )) && (( $WG_SUBNET_SET == 0 )); then
echo "ERROR: fourth byte set but \"-u\" not used!"
exit 13
elif ! [[ "$IPV6_TEMPLATE" =~ .*x$ ]]; then
echo "ERROR: IPV6_TEMPLATE is invalid (does not end in x)!"
exit 14
elif ! [[ "$IPV6_TEMPLATE" =~ ^fc.*$ ]] && ! [[ "$IPV6_TEMPLATE" =~ ^fd.*$ ]]; then
echo "ERROR: IPV6_TEMPLATE is invalid (not in local address range)!"
exit 15
fi
# validation of "-u <subnet>"
@ -126,7 +136,25 @@ elif (( $WG_SUBNET > 24 )); then
CLIENT_COUNT=$(( 2**(32 - $WG_SUBNET) - 2 - 1 ))
fi
echo "Creating config with name \"$WGNAME\" with \"$CLIENT_COUNT\" clients and subnet \"$WG_SUBNET\"..."
IPV6_SUBNET=$(( 128 - (32 - WG_SUBNET ) ))
function to_ipv6_from_template() {
if (( $1 < (1 << 8) )); then
echo "${IPV6_TEMPLATE/x/$(printf "%04x" "$1")}"
elif (( $1 < (1 << 16) )); then
echo "${IPV6_TEMPLATE/x/$(printf "%04x" $(( ($1 >> 8) & 0xFFFF )) ):$(printf "%04x" $(( $1 & 0xFFFF )) )}"
elif (( $1 < (1 << 24) )); then
echo "${IPV6_TEMPLATE/x/$(printf "%04x" $(( ($1 >> 16) & 0xFFFF)) ):$(printf "%04x" $(( ($1 >> 8) & 0xFFFF )) ):$(printf "%04x" $(( $1 & 0xFFFF )) )}"
elif (( $1 < (1 << 32) )); then
echo "${IPV6_TEMPLATE/x/$(printf "%04x" $(( ($1 >> 24) & 0xFFFF)) ):$(printf "%04x" $(( ($1 >> 16) & 0xFFFF)) ):$(printf "%04x" $(( ($1 >> 8) & 0xFFFF )) ):$(printf "%04x" $(( $1 & 0xFFFF )) )}"
else
echo "ERROR"
return 1
fi
return 0
}
echo "Creating config with name \"$WGNAME\" with \"$CLIENT_COUNT\" clients and ipv4 subnet \"$WG_SUBNET\"..."
mkdir -p "$HOME/temp"
@ -140,7 +168,7 @@ SERVER_PUB="$(echo -n ${SERVER_PRK} | wg pubkey)"
echo "Creating server conf (will be appended to with client info)..."
cat >> "${SERVER_CONF}" <<EOF
[Interface]
Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( 1 | $IPV4_FOURTH ))/$WG_SUBNET
Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( 1 | $IPV4_FOURTH ))/$WG_SUBNET, $(to_ipv6_from_template 1)/${IPV6_SUBNET}
ListenPort = ${SERVER_LISTEN_PORT}
PrivateKey = ${SERVER_PRK}
EOF
@ -158,19 +186,19 @@ for ((i = 0; i < $CLIENT_COUNT; ++i)); do
[Peer]
PublicKey = ${CLIENT_PUB}
PresharedKey = ${CLIENT_PRE}
AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( (i + 2) | $IPV4_FOURTH ))/32
AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( (i + 2) | $IPV4_FOURTH ))/32, $(to_ipv6_from_template $(($i + 2)) )/128
EOF
echo "Creating client $((i + 1)) conf..."
cat >> "${CLIENT_CONF}" <<EOF
[Interface]
Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( (i + 2) | $IPV4_FOURTH ))/$WG_SUBNET
Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( (i + 2) | $IPV4_FOURTH ))/$WG_SUBNET, $(to_ipv6_from_template $(($i + 2)) )/${IPV6_SUBNET}
PrivateKey = ${CLIENT_PRK}
[Peer]
PublicKey = ${SERVER_PUB}
PresharedKey = ${CLIENT_PRE}
AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( 1 | $IPV4_FOURTH ))/32
AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( 1 | $IPV4_FOURTH ))/32, $(to_ipv6_from_template 1)/128
Endpoint = ${SERVER_ENDPOINT}:${SERVER_LISTEN_PORT}
EOF