Impl full subnet clients for wireguardConfigGenerator.sh
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d99c70fc78
commit
39bc54234a
1 changed files with 51 additions and 8 deletions
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@ -10,13 +10,15 @@ function print_help {
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echo "Generates config for wireguard"
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echo "-h - prints this help"
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echo "-n <name> - gives a name to the config"
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echo "-c <count> - number of clients to generate for"
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echo "-c <count> - number of clients to generate for. Mutually exclusive with \"-u\""
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echo "-s <ipv4_second> - sets the second byte of the ipv4"
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echo "-i <ipv4_third> - sets the third byte of the ipv4"
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echo "-e <endpoint> - ip address or domain name (required)"
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echo "-p <port> - listen port of server (defaults to 50000)"
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echo "-k - enables persistent keepalive for clients"
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echo "-o <directory> - output dir to place configs (required)"
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echo "-u <subnet> - subnet to use (default 24). Mutually exclusive with \"-c\""
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echo "-f <ipv4_fourth> - must use with \"-u\" to set partial fourth byte"
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}
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WGNAME="wg$(date | sha1sum | head -c 8)"
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@ -24,14 +26,18 @@ CLIENT_COUNT=1
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IPV4_FIRST=10
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IPV4_SECOND=8 # this can be modified with "-s <integer>"
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IPV4_THIRD=0 # this can be modified with "-i <integer>"
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# IPV4_FOURTH is generated automatically. Server starts with 1, and clients increment afterward.
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IPV4_FOURTH=0 # used when "-u <subnet>" is used
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SERVER_ENDPOINT="REQUIRED"
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SERVER_LISTEN_PORT=50000
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ENABLE_PERSISTENT_KEEPALIVE=0
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CONFIG_OUTPUT_DIRECTORY="REQUIRED"
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WG_SUBNET=24
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CLIENT_COUNT_SET=0
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WG_SUBNET_SET=0
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IPV4_FOURTH_SET=0
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# OPTARG
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while getopts 'hn:c:s:i:e:p:ko:' opt; do
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while getopts 'hn:c:s:i:e:p:ko:u:f:' opt; do
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if [ "$opt" == "?" ]; then
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print_help
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exit 1
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@ -42,6 +48,7 @@ while getopts 'hn:c:s:i:e:p:ko:' opt; do
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WGNAME="$OPTARG"
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elif [ "$opt" == "c" ]; then
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CLIENT_COUNT="$OPTARG"
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CLIENT_COUNT_SET=1
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elif [ "$opt" == "s" ]; then
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IPV4_SECOND="$OPTARG"
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if (($IPV4_SECOND < 0 || $IPV4_SECOND > 255)); then
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@ -69,9 +76,16 @@ while getopts 'hn:c:s:i:e:p:ko:' opt; do
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ENABLE_PERSISTENT_KEEPALIVE=1
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elif [ "$opt" == "o" ]; then
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CONFIG_OUTPUT_DIRECTORY="$OPTARG"
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elif [ "$opt" == "u" ]; then
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WG_SUBNET="$OPTARG"
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WG_SUBNET_SET=1
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elif [ "$opt" == "f" ]; then
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IPV4_FOURTH="$OPTARG"
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IPV4_FOURTH_SET=1
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fi
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done
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# validation
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if [ "$SERVER_ENDPOINT" == "REQUIRED" ]; then
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echo "ERROR: Endpoint is not set with \"-e\" !"
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exit 2
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@ -81,9 +95,38 @@ elif [ "$CONFIG_OUTPUT_DIRECTORY" == "REQUIRED" ]; then
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elif [ ! -d "$CONFIG_OUTPUT_DIRECTORY" ]; then
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echo "ERROR: dir set with \"-o\" is not a directory!"
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exit 4
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elif (( $CLIENT_COUNT_SET )) && (( $WG_SUBNET_SET )); then
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echo "ERROR: \"-c\" and \"-u\" is mutually exclusive!"
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exit 12
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elif (( $IPV4_FOURTH_SET )) && (( $WG_SUBNET_SET == 0 )); then
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echo "ERROR: fourth byte set but \"-u\" not used!"
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exit 13
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fi
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echo "Creating config with name \"$WGNAME\" with \"$CLIENT_COUNT\" clients..."
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# validation of "-u <subnet>"
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if (( $WG_SUBNET < 24 )); then
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echo "ERROR: subnet cannot be less than 24!"
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exit 9
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elif (( $WG_SUBNET > 24 )); then
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USED_BITS=$(( 32 - $WG_SUBNET ))
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if (( $USED_BITS < 2 )); then
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echo "ERROR: subnet \"$WG_SUBNET\" is too large! Use 24-30!"
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exit 11
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fi
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TEMP_A="$IPV4_FOURTH"
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while (( $USED_BITS > 0 )); do
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if (( $TEMP_A & 1 != 0 )); then
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echo "ERROR: Invalid IPV4_FOURTH when using subnet \"$WG_SUBNET\"!"
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exit 10
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fi
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TEMP_A=$(( $TEMP_A >> 1 ))
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USED_BITS=$(( $USED_BITS - 1 ))
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done
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CLIENT_COUNT=$(( 2**(32 - $WG_SUBNET) - 2 ))
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fi
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echo "Creating config with name \"$WGNAME\" with \"$CLIENT_COUNT\" clients and subnet \"$WG_SUBNET\"..."
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mkdir -p "$HOME/temp"
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@ -97,7 +140,7 @@ SERVER_PUB="$(echo -n ${SERVER_PRK} | wg pubkey)"
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echo "Creating server conf (will be appended to with client info)..."
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cat >> "${SERVER_CONF}" <<EOF
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[Interface]
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Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.1/24
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Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( 1 | $IPV4_FOURTH ))/$WG_SUBNET
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ListenPort = ${SERVER_LISTEN_PORT}
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PrivateKey = ${SERVER_PRK}
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EOF
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@ -115,19 +158,19 @@ for ((i = 0; i < $CLIENT_COUNT; ++i)); do
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[Peer]
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PublicKey = ${CLIENT_PUB}
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PresharedKey = ${CLIENT_PRE}
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AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$((i + 2))/32
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AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( (i + 2) | $IPV4_FOURTH ))/32
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EOF
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echo "Creating client $((i + 1)) conf..."
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cat >> "${CLIENT_CONF}" <<EOF
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[Interface]
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Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$((i + 2))/24
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Address = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( (i + 2) | $IPV4_FOURTH ))/$WG_SUBNET
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PrivateKey = ${CLIENT_PRK}
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[Peer]
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PublicKey = ${SERVER_PUB}
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PresharedKey = ${CLIENT_PRE}
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AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.1/32
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AllowedIPs = ${IPV4_FIRST}.${IPV4_SECOND}.${IPV4_THIRD}.$(( 1 | $IPV4_FOURTH ))/32
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Endpoint = ${SERVER_ENDPOINT}:${SERVER_LISTEN_PORT}
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EOF
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