401 lines
13 KiB
Text
401 lines
13 KiB
Text
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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# Copyright (C) 2021-2022 Daniel afx <daniel@deflax.net>
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#
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#set -e -o pipefail
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shopt -s extglob
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export LC_ALL=C
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SELF="$(readlink -f "${BASH_SOURCE[0]}")"
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export PATH="${SELF%/*}:$PATH"
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WG_CONFIG=""
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CONFIG_FILE=""
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PROGRAM="${0##*/}"
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ARGS=( "$@" )
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EXTERNAL_NETWORK_TEST_IP="1.1.1.1"
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cmd_usage() {
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cat >&2 <<-_EOF
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Usage: $PROGRAM [ CONFIG_NAME ]
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CONFIG_NAME is the name of a configuration file, which is also the interface
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name followed by \`.conf'. It should be a configuration found at
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/etc/wireguard/INTERFACE.conf. It is to be readable by wg(8)'s \`setconf'
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sub-command, with the exception of the following additions
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to the [Interface] section, which are handled by $PROGRAM:
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- Address: may be specified one or more times and contains one or more
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IP addresses (with an optional CIDR mask) to be set for the interface.
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- DNS: an optional DNS server to use while the device is up.
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- MTU: an optional MTU for the interface; if unspecified, auto-calculated.
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- Table: an optional routing table to which routes will be added; if
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unspecified or \`auto', the default table is used. If \`off', no routes
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are added.
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- PreUp, PostUp, PreDown, PostDown: script snippets which will be executed
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by bash(1) at the corresponding phases of the link, most commonly used
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to configure DNS. The string \`%i' is expanded to INTERFACE.
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If for some reason the interface is already up, you could use:
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$PROGRAM [ CONFIG_NAME ] down
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_EOF
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}
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# Helper Functions
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auto_su() {
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[[ $UID == 0 ]] || exec sudo -p "$PROGRAM must be run as root. Please enter the password for %u to continue: " -- "$BASH" -- "$SELF" "${ARGS[@]}"
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}
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say() {
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echo " ] $*"
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}
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die() {
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echo "!] $*" >&2
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exit 1
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}
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cmd() {
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echo "#] $*" >&2
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"$@"
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}
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execute_hooks() {
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local hook
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for hook in "$@"; do
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hook="${hook//%i/$INTERFACE}"
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echo "#] $hook" >&2
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(eval "$hook")
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done
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}
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parse_options() {
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INTERFACE=""
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ADDRESSES=( )
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MTU=""
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DNS=( )
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DNS_SEARCH=( )
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TABLE=""
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PRE_UP=( )
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POST_UP=( )
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PRE_DOWN=( )
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POST_DOWN=( )
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local interface_section=0 line key value stripped v
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CONFIG_FILE="$1"
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[[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]] && CONFIG_FILE="/etc/wireguard/$CONFIG_FILE.conf"
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[[ -e $CONFIG_FILE ]] || die "\`$CONFIG_FILE' does not exist"
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[[ $CONFIG_FILE =~ (^|/)([a-zA-Z0-9_=+.-]{1,15})\.conf$ ]] || die "The config file must be a valid interface name, followed by .conf"
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CONFIG_FILE="$(readlink -f "$CONFIG_FILE")"
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((($(stat -c '0%#a' "$CONFIG_FILE") & $(stat -c '0%#a' "${CONFIG_FILE%/*}") & 0007) == 0)) || echo "Warning: \`$CONFIG_FILE' is world accessible" >&2
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INTERFACE="${BASH_REMATCH[2]}"
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shopt -s nocasematch
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while read -r line || [[ -n $line ]]; do
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stripped="${line%%\#*}"
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key="${stripped%%=*}"; key="${key##*([[:space:]])}"; key="${key%%*([[:space:]])}"
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value="${stripped#*=}"; value="${value##*([[:space:]])}"; value="${value%%*([[:space:]])}"
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[[ $key == "["* ]] && interface_section=0
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[[ $key == "[Interface]" ]] && interface_section=1
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if [[ $interface_section -eq 1 ]]; then
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case "$key" in
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Address) ADDRESSES+=( ${value//,/ } ); continue ;;
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MTU) MTU="$value"; continue ;;
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DNS) for v in ${value//,/ }; do
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[[ $v =~ (^[0-9.]+$)|(^.*:.*$) ]] && DNS+=( $v ) || DNS_SEARCH+=( $v )
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done; continue ;;
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Table) TABLE="$value"; continue ;;
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PreUp) PRE_UP+=( "$value" ); continue ;;
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PreDown) PRE_DOWN+=( "$value" ); continue ;;
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PostUp) POST_UP+=( "$value" ); continue ;;
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PostDown) POST_DOWN+=( "$value" ); continue ;;
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esac
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fi
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WG_CONFIG+="$line"$'\n'
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done < "$CONFIG_FILE"
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shopt -u nocasematch
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}
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set_config() {
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cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG")
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}
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# Setup Interface and Address
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add_if() {
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local ret
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if ! cmd ip link add "$INTERFACE" type wireguard; then
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ret=$?
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[[ -e /sys/module/wireguard ]] || ! command -v "${WG_QUICK_USERSPACE_IMPLEMENTATION:-wireguard-go}" >/dev/null && exit $ret
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echo "!] Missing WireGuard kernel module. Falling back to slow userspace implementation." >&2
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cmd "${WG_QUICK_USERSPACE_IMPLEMENTATION:-wireguard-go}" "$INTERFACE"
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fi
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}
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del_if() {
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local table
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#[[ $HAVE_SET_DNS -eq 0 ]] || unset_dns
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#[[ $HAVE_SET_FIREWALL -eq 0 ]] || remove_firewall
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if [[ -z $TABLE || $TABLE == auto ]] && get_fwmark table && [[ $(wg show "$INTERFACE" allowed-ips) =~ /0(\ |$'\n'|$) ]]; then
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while [[ $(ip -4 rule show 2>/dev/null) == *"lookup $table"* ]]; do
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cmd ip -4 rule delete table $table
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done
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while [[ $(ip -4 rule show 2>/dev/null) == *"from all lookup main suppress_prefixlength 0"* ]]; do
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cmd ip -4 rule delete table main suppress_prefixlength 0
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done
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while [[ $(ip -6 rule show 2>/dev/null) == *"lookup $table"* ]]; do
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cmd ip -6 rule delete table $table
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done
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while [[ $(ip -6 rule show 2>/dev/null) == *"from all lookup main suppress_prefixlength 0"* ]]; do
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cmd ip -6 rule delete table main suppress_prefixlength 0
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done
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fi
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cmd ip link delete dev "$INTERFACE"
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}
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add_addr() {
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local proto=-4
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[[ $1 == *:* ]] && proto=-6
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cmd ip $proto address add "$1" dev "$INTERFACE"
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}
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set_mtu_up() {
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local mtu=0 endpoint output
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if [[ -n $MTU ]]; then
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cmd ip link set mtu "$MTU" up dev "$INTERFACE"
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return
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fi
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while read -r _ endpoint; do
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[[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
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output="$(ip route get "${BASH_REMATCH[1]}" || true)"
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[[ ( $output =~ mtu\ ([0-9]+) || ( $output =~ dev\ ([^ ]+) && $(ip link show dev "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) ) ) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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done < <(wg show "$INTERFACE" endpoints)
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if [[ $mtu -eq 0 ]]; then
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read -r output < <(ip route show default || true) || true
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[[ ( $output =~ mtu\ ([0-9]+) || ( $output =~ dev\ ([^ ]+) && $(ip link show dev "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) ) ) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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fi
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[[ $mtu -gt 0 ]] || mtu=1500
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cmd ip link set mtu $(( mtu - 80 )) up dev "$INTERFACE"
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}
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# Checks the active internet connection interface
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transport_interface() {
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local netiface
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netiface=$(ip route get ${EXTERNAL_NETWORK_TEST_IP} | grep -Po '(?<=dev\s)\w+' | cut -f1 -d ' ')
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if [ -z ${netiface} ]; then
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die "Unable to reach ${EXTERNAL_NETWORK_TEST_IP}. Check the Internet connection"
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exit 1
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else
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echo "${netiface}"
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fi
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}
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# Setup DNS
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HAVE_SET_DNS=0
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set_dns() {
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[[ ${#DNS[@]} -gt 0 ]] || return 0
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#{ printf 'nameserver %s\n' "${DNS[@]}"
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# [[ ${#DNS_SEARCH[@]} -eq 0 ]] || printf 'search %s\n' "${DNS_SEARCH[*]}"
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#} | cmd resolvconf -a "$(resolvconf_iface_prefix)$INTERFACE" -m 0 -x
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cmd resolvectl dns ${INTERFACE} "${DNS[@]}"
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cmd resolvectl domain ${INTERFACE} "~."
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cmd resolvectl domain $(transport_interface) "lan"
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HAVE_SET_DNS=1
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}
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unset_dns() {
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[[ ${#DNS[@]} -gt 0 ]] || return 0
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cmd resolvectl domain $(transport_interface) "lan"
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cmd resolvectl domain $(transport_interface) "~."
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}
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# Setup Routes and Firewall
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add_route() {
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local proto=-4
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[[ $1 == *:* ]] && proto=-6
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[[ $TABLE != off ]] || return 0
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if [[ -n $TABLE && $TABLE != auto ]]; then
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cmd ip $proto route add "$1" dev "$INTERFACE" table "$TABLE"
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elif [[ $1 == */0 ]]; then
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add_default "$1"
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else
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[[ -n $(ip $proto route show dev "$INTERFACE" match "$1" 2>/dev/null) ]] || cmd ip $proto route add "$1" dev "$INTERFACE"
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fi
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}
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get_fwmark() {
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local fwmark
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fwmark="$(wg show "$INTERFACE" fwmark)" || return 1
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[[ -n $fwmark && $fwmark != off ]] || return 1
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printf -v "$1" "%d" "$fwmark"
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return 0
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}
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HAVE_SET_FIREWALL=0
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add_default() {
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local table line
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if ! get_fwmark table; then
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table=51820
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while [[ -n $(ip -4 route show table $table 2>/dev/null) || -n $(ip -6 route show table $table 2>/dev/null) ]]; do
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((table++))
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done
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cmd wg set "$INTERFACE" fwmark $table
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fi
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local proto=-4 iptables=iptables pf=ip
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[[ $1 == *:* ]] && proto=-6 iptables=ip6tables pf=ip6
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cmd ip $proto route add "$1" dev "$INTERFACE" table $table
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cmd ip $proto rule add not fwmark $table table $table
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cmd ip $proto rule add table main suppress_prefixlength 0
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local marker="-m comment --comment \"wg-quick(8) rule for $INTERFACE\"" restore=$'*raw\n' nftable="wg-quick-$INTERFACE" nftcmd
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printf -v nftcmd '%sadd table %s %s\n' "$nftcmd" "$pf" "$nftable"
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printf -v nftcmd '%sadd chain %s %s preraw { type filter hook prerouting priority -300; }\n' "$nftcmd" "$pf" "$nftable"
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printf -v nftcmd '%sadd chain %s %s premangle { type filter hook prerouting priority -150; }\n' "$nftcmd" "$pf" "$nftable"
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printf -v nftcmd '%sadd chain %s %s postmangle { type filter hook postrouting priority -150; }\n' "$nftcmd" "$pf" "$nftable"
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while read -r line; do
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[[ $line =~ .*inet6?\ ([0-9a-f:.]+)/[0-9]+.* ]] || continue
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printf -v restore '%s-I PREROUTING ! -i %s -d %s -m addrtype ! --src-type LOCAL -j DROP %s\n' "$restore" "$INTERFACE" "${BASH_REMATCH[1]}" "$marker"
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printf -v nftcmd '%sadd rule %s %s preraw iifname != "%s" %s daddr %s fib saddr type != local drop\n' "$nftcmd" "$pf" "$nftable" "$INTERFACE" "$pf" "${BASH_REMATCH[1]}"
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done < <(ip -o $proto addr show dev "$INTERFACE" 2>/dev/null)
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printf -v restore '%sCOMMIT\n*mangle\n-I POSTROUTING -m mark --mark %d -p udp -j CONNMARK --save-mark %s\n-I PREROUTING -p udp -j CONNMARK --restore-mark %s\nCOMMIT\n' "$restore" $table "$marker" "$marker"
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printf -v nftcmd '%sadd rule %s %s postmangle meta l4proto udp mark %d ct mark set mark \n' "$nftcmd" "$pf" "$nftable" $table
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printf -v nftcmd '%sadd rule %s %s premangle meta l4proto udp meta mark set ct mark \n' "$nftcmd" "$pf" "$nftable"
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[[ $proto == -4 ]] && cmd sysctl -q net.ipv4.conf.all.src_valid_mark=1
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if type -p nft >/dev/null; then
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cmd nft -f <(echo -n "$nftcmd")
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else
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echo -n "$restore" | cmd $iptables-restore -n
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fi
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HAVE_SET_FIREWALL=1
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return 0
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}
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remove_firewall() {
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if type -p nft >/dev/null; then
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local table nftcmd
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while read -r table; do
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[[ $table == *" wg-quick-$INTERFACE" ]] && printf -v nftcmd '%sdelete %s\n' "$nftcmd" "$table"
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done < <(nft list tables 2>/dev/null)
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[[ -z $nftcmd ]] || cmd nft -f <(echo -n "$nftcmd")
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fi
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if type -p iptables >/dev/null; then
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local line iptables found restore
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for iptables in iptables ip6tables; do
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restore="" found=0
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while read -r line; do
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[[ $line == "*"* || $line == COMMIT || $line == "-A "*"-m comment --comment \"wg-quick(8) rule for $INTERFACE\""* ]] || continue
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[[ $line == "-A"* ]] && found=1
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printf -v restore '%s%s\n' "$restore" "${line/#-A/-D}"
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done < <($iptables-save 2>/dev/null)
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[[ $found -ne 1 ]] || echo -n "$restore" | cmd $iptables-restore -n
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done
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fi
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}
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# Up/Down Functions
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cmd_up() {
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local i
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#[[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists"
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[[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || cmd_down
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trap 'del_if; exit' INT TERM EXIT
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say "Starting UP the ${INTERFACE} interface ..."
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execute_hooks "${PRE_UP[@]}"
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add_if
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set_config
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for i in "${ADDRESSES[@]}"; do
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add_addr "$i"
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done
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set_mtu_up
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set_dns
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for i in $(while read -r _ i; do for i in $i; do [[ $i =~ ^[0-9a-z:.]+/[0-9]+$ ]] && echo "$i"; done; done < <(wg show "$INTERFACE" allowed-ips) | sort -nr -k 2 -t /); do
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add_route "$i"
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done
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execute_hooks "${POST_UP[@]}"
|
||
|
|
trap - INT TERM EXIT
|
||
|
|
sleep 3
|
||
|
|
}
|
||
|
|
|
||
|
|
cmd_down() {
|
||
|
|
say "Bringing DOWN the ${INTERFACE} interface ..."
|
||
|
|
[[ " $(wg show interfaces) " == *" $INTERFACE "* ]] || die "$INTERFACE is not a WireGuard interface"
|
||
|
|
execute_hooks "${PRE_DOWN[@]}"
|
||
|
|
del_if
|
||
|
|
[[ $HAVE_SET_DNS -eq 0 ]] || unset_dns
|
||
|
|
[[ $HAVE_SET_FIREWALL -eq 0 ]] || remove_firewall
|
||
|
|
#unset_dns || true
|
||
|
|
#remove_firewall || true
|
||
|
|
execute_hooks "${POST_DOWN[@]}"
|
||
|
|
sleep 1
|
||
|
|
}
|
||
|
|
|
||
|
|
# Main
|
||
|
|
if [[ $# -eq 0 ]]; then
|
||
|
|
cmd_usage
|
||
|
|
exit 1
|
||
|
|
elif [[ $# -eq 1 ]]; then
|
||
|
|
auto_su
|
||
|
|
parse_options "$1"
|
||
|
|
cmd_up
|
||
|
|
while true; do
|
||
|
|
clear
|
||
|
|
say "wg-rapid by afx. ver.2204"
|
||
|
|
echo " "
|
||
|
|
say "[q] to stop the VPN connection."
|
||
|
|
say "[d] or close the terminal window to keep the VPN connection setup configured"
|
||
|
|
say "[o] forward all networking through the VPN tunnel"
|
||
|
|
say "[p] forward the predefined routes only through the VPN tunnel"
|
||
|
|
echo " "
|
||
|
|
wg show
|
||
|
|
echo " "
|
||
|
|
read -t 1 -N 1 input
|
||
|
|
if [[ $input = "q" ]] || [[ $input = "Q" ]]; then
|
||
|
|
echo
|
||
|
|
break
|
||
|
|
fi
|
||
|
|
if [[ $input = "d" ]] || [[ $input = "D" ]]; then
|
||
|
|
echo
|
||
|
|
say "$PROGRAM detached."
|
||
|
|
exit 0
|
||
|
|
fi
|
||
|
|
if [[ $input = "p" ]] || [[ $input = "P" ]]; then
|
||
|
|
cmd_down
|
||
|
|
LINE_ROUTE_LOCAL=`grep -n 'Route only vpn trafic through vpn' /etc/wireguard/$1.conf | cut -d ':' -f 1`
|
||
|
|
((LINE_ROUTE_LOCAL=LINE_ROUTE_LOCAL+1))
|
||
|
|
LINE_ROUTE_ALL=`grep -n 'Route ALL traffic through vpn' /etc/wireguard/$1.conf | cut -d ':' -f 1`
|
||
|
|
((LINE_ROUTE_ALL=LINE_ROUTE_ALL+1))
|
||
|
|
sed -i "${LINE_ROUTE_LOCAL} s/^##*//" /etc/wireguard/$1.conf
|
||
|
|
sed -i "${LINE_ROUTE_ALL} s/^/#/" /etc/wireguard/$1.conf
|
||
|
|
parse_options "$1"
|
||
|
|
cmd_up
|
||
|
|
fi
|
||
|
|
if [[ $input = "o" ]] || [[ $input = "O" ]]; then
|
||
|
|
cmd_down
|
||
|
|
sleep 1
|
||
|
|
LINE_ROUTE_LOCAL=`grep -n 'Route only vpn trafic through vpn' /etc/wireguard/$1.conf | cut -d ':' -f 1`
|
||
|
|
((LINE_ROUTE_LOCAL=LINE_ROUTE_LOCAL+1))
|
||
|
|
LINE_ROUTE_ALL=`grep -n 'Route ALL traffic through vpn' /etc/wireguard/$1.conf | cut -d ':' -f 1`
|
||
|
|
((LINE_ROUTE_ALL=LINE_ROUTE_ALL+1))
|
||
|
|
sed -i "${LINE_ROUTE_LOCAL} s/^/#/" /etc/wireguard/$1.conf
|
||
|
|
sed -i "${LINE_ROUTE_ALL} s/^##*//" /etc/wireguard/$1.conf
|
||
|
|
parse_options "$1"
|
||
|
|
cmd_up
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
cmd_down
|
||
|
|
elif [[ $# -eq 2 ]]; then
|
||
|
|
auto_su
|
||
|
|
parse_options "$1"
|
||
|
|
if [ "$2" == "down" ]; then
|
||
|
|
cmd_down
|
||
|
|
exit 0
|
||
|
|
else
|
||
|
|
say "$PROGRAM [ CONFIG_NAME ] [ down ]"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
exit 0
|