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authorJason A. Donenfeld <Jason@zx2c4.com>2017-07-31 03:02:26 +0200
committerSamuel Holland <samuel@sholland.org>2017-07-31 03:02:26 +0200
commitad06f51589f97fda5d2e7f83e430208c838862a8 (patch)
treef43de4a3a219c9805cd91ec743b8f395cbbae25c
parentc8ff6076f0487197a9f539eab0343a6dcd7b3f9b (diff)
cli: import from contrib/examples/android
-rw-r--r--cli/README.md21
-rw-r--r--cli/addonsd.sh37
-rwxr-xr-xcli/install.sh14
-rw-r--r--cli/wg-quick.bash187
4 files changed, 259 insertions, 0 deletions
diff --git a/cli/README.md b/cli/README.md
new file mode 100644
index 00000000..2d16fc40
--- /dev/null
+++ b/cli/README.md
@@ -0,0 +1,21 @@
+# Tools for Android
+
+This currently contains a version of wg-quick.bash that works with
+Android 7's `ndc` command. It requires the WireGuard module to be
+part of your kernel, but after that, the usual `wg-quick up` and
+`wg-quick down` commands work normally.
+
+## Installation
+
+Build a `wg` binary for Android and place it in this folder. Then
+copy this folder some place on your phone, and run `sh ./install.sh`
+as root. It should survive ROM flashes.
+
+## Usage
+
+Compared to the ordinary wg-quick, this one does not support SaveConfig
+and {Pre,Post}{Up,Down}.
+
+Put your configuration files into `/data/misc/wireguard/`. After that,
+the normal `wg-quick up|down` commands will work.
+
diff --git a/cli/addonsd.sh b/cli/addonsd.sh
new file mode 100644
index 00000000..90865d0c
--- /dev/null
+++ b/cli/addonsd.sh
@@ -0,0 +1,37 @@
+#!/sbin/sh
+
+. /tmp/backuptool.functions
+
+list_files() {
+cat <<_EOF
+xbin/wg
+xbin/wg-quick
+_EOF
+}
+
+case "$1" in
+ backup)
+ list_files | while read FILE DUMMY; do
+ backup_file $S/"$FILE"
+ done
+ ;;
+ restore)
+ list_files | while read FILE REPLACEMENT; do
+ R=""
+ [ -n "$REPLACEMENT" ] && R="$S/$REPLACEMENT"
+ [ -f "$C/$S/$FILE" ] && restore_file $S/"$FILE" "$R"
+ done
+ ;;
+ pre-backup)
+ # Stub
+ ;;
+ post-backup)
+ # Stub
+ ;;
+ pre-restore)
+ # Stub
+ ;;
+ post-restore)
+ # Stub
+ ;;
+esac
diff --git a/cli/install.sh b/cli/install.sh
new file mode 100755
index 00000000..f619eb6c
--- /dev/null
+++ b/cli/install.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+mount -o rw,remount /system
+
+cp -v ./addonsd.sh /system/addon.d/40-wireguard.sh
+if [ -f ./wg ]; then
+ cp -v ./wg /system/xbin/wg
+else
+ echo "Warning: this directory does not contain wg. You may have forgotten to compile it yourself?" >&2
+fi
+cp -v ./wg-quick.bash /system/xbin/wg-quick
+chmod 755 /system/xbin/wg /system/xbin/wg-quick /system/addon.d/40-wireguard.sh
+mkdir -pvm 700 /data/misc/wireguard
+
+mount -o ro,remount /system
diff --git a/cli/wg-quick.bash b/cli/wg-quick.bash
new file mode 100644
index 00000000..40417358
--- /dev/null
+++ b/cli/wg-quick.bash
@@ -0,0 +1,187 @@
+#!/system/xbin/bash
+#
+# Copyright (C) 2016-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+#
+
+set -e -o pipefail
+shopt -s extglob
+export LC_ALL=C
+
+SELF="$(readlink -f "${BASH_SOURCE[0]}")"
+export PATH="${SELF%/*}:$PATH"
+
+WG_CONFIG=""
+INTERFACE=""
+NETID=0
+ADDRESSES=( )
+MTU=""
+DNS=""
+CONFIG_FILE=""
+PROGRAM="${0##*/}"
+ARGS=( "$@" )
+
+parse_options() {
+ local interface_section=0 line key value
+ CONFIG_FILE="$1"
+ [[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,16}$ ]] && CONFIG_FILE="/data/misc/wireguard/$CONFIG_FILE.conf"
+ [[ -e $CONFIG_FILE ]] || die "\`$CONFIG_FILE' does not exist"
+ [[ $CONFIG_FILE =~ /?([a-zA-Z0-9_=+.-]{1,16})\.conf$ ]] || die "The config file must be a valid interface name, followed by .conf"
+ ((($(stat -c '%#a' "$CONFIG_FILE") & 0007) == 0)) || echo "Warning: \`$CONFIG_FILE' is world accessible" >&2
+ INTERFACE="${BASH_REMATCH[1]}"
+ shopt -s nocasematch
+ while read -r line || [[ -n $line ]]; do
+ key="${line%%=*}"; key="${key##*( )}"; key="${key%%*( )}"
+ value="${line#*=}"; value="${value##*( )}"; value="${value%%*( )}"
+ [[ $key == "["* ]] && interface_section=0
+ [[ $key == "[Interface]" ]] && interface_section=1
+ if [[ $interface_section -eq 1 ]]; then
+ case "$key" in
+ Address) ADDRESSES+=( ${value//,/ } ); continue ;;
+ MTU) MTU="$value"; continue ;;
+ DNS) DNS="$value"; continue ;;
+ esac
+ fi
+ WG_CONFIG+="$line"$'\n'
+ done < "$CONFIG_FILE"
+ shopt -u nocasematch
+}
+
+cmd() {
+ echo "[#] $*" >&2
+ "$@"
+}
+
+cndc() {
+ local out="$(cmd ndc "$@")"
+ [[ $out == *200\ 0* ]] || { echo "$out"; return 1; }
+}
+
+die() {
+ echo "$PROGRAM: $*" >&2
+ exit 1
+}
+
+auto_su() {
+ [[ $UID == 0 ]] || exec su -p -c "'$SELF' ${ARGS[*]}"
+}
+
+add_if() {
+ cmd ip link add "$INTERFACE" type wireguard
+}
+
+del_if() {
+ cmd ip link del "$INTERFACE"
+ [[ $(ip rule show) =~ 0xc([0-9a-f]+)/0xcffff\ lookup\ $INTERFACE ]] && cndc network destroy $(( 0x${BASH_REMATCH[1]} ));
+}
+
+up_if() {
+ while [[ $NETID -lt 4096 ]]; do
+ NETID="$RANDOM"
+ done
+ cmd wg set "$INTERFACE" fwmark 0x20000
+ cndc interface setcfg "$INTERFACE" up
+ cndc network create "$NETID" vpn 1 1
+ cndc network interface add "$NETID" "$INTERFACE"
+ cndc network users add "$NETID" 0-99999
+}
+
+set_dns() {
+ cndc resolver setnetdns "$NETID" "" "$1"
+}
+
+add_addr() {
+ if [[ $1 == *:* ]]; then
+ cndc interface ipv6 "$INTERFACE" enable
+ cmd ip -6 addr add "$1" dev "$INTERFACE"
+ else
+ local ip="${1%%/*}" mask=32
+ [[ $1 == */* ]] && mask="${1##*/}"
+ cndc interface setcfg "$INTERFACE" "$ip" "$mask"
+ fi
+}
+
+set_mtu() {
+ local mtu=0 endpoint output
+ if [[ -n $MTU ]]; then
+ cndc interface setmtu "$INTERFACE" "$MTU"
+ return
+ fi
+ while read -r _ endpoint; do
+ [[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
+ output="$(ip route get "${BASH_REMATCH[1]}" || true)"
+ [[ ( $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]}"
+ done < <(wg show "$INTERFACE" endpoints)
+ if [[ $mtu -eq 0 ]]; then
+ read -r output < <(ip route show default || true) || true
+ [[ ( $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]}"
+ fi
+ [[ $mtu -gt 0 ]] || mtu=1500
+ cndc interface setmtu "$INTERFACE" $(( mtu - 80 ))
+}
+
+add_route() {
+ cndc network route add "$NETID" "$INTERFACE" "$1"
+}
+
+set_config() {
+ cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG")
+}
+
+cmd_usage() {
+ cat >&2 <<-_EOF
+ Usage: $PROGRAM [ up | down ] [ CONFIG_FILE | INTERFACE ]
+
+ CONFIG_FILE is a configuration file, whose filename is the interface name
+ followed by \`.conf'. Otherwise, INTERFACE is an interface name, with
+ configuration found at /data/misc/wireguard/INTERFACE.conf. It is to be readable
+ by wg(8)'s \`setconf' sub-command, with the exception of the following additions
+ to the [Interface] section, which are handled by $PROGRAM:
+
+ - Address: may be specified one or more times and contains one or more
+ IP addresses (with an optional CIDR mask) to be set for the interface.
+ - MTU: an optional MTU for the interface; if unspecified, auto-calculated.
+ - DNS: an optional DNS server to use while the device is up.
+
+ See wg-quick(8) for more info and examples.
+ _EOF
+}
+
+cmd_up() {
+ local i
+ [[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists"
+ trap 'del_if; exit' INT TERM EXIT
+ add_if
+ set_config
+ set_mtu
+ for i in "${ADDRESSES[@]}"; do
+ add_addr "$i"
+ done
+ up_if
+ [[ -z $DNS ]] || set_dns "$DNS"
+ 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
+ [[ $(ip route get "$i" 2>/dev/null) == *dev\ $INTERFACE\ * ]] || add_route "$i"
+ done
+ trap - INT TERM EXIT
+}
+
+cmd_down() {
+ [[ -n $(ip link show dev "$INTERFACE" type wireguard 2>/dev/null) ]] || die "\`$INTERFACE' is not a WireGuard interface"
+ del_if
+}
+
+if [[ $# -eq 1 && ( $1 == --help || $1 == -h || $1 == help ) ]]; then
+ cmd_usage
+elif [[ $# -eq 2 && $1 == up ]]; then
+ auto_su
+ parse_options "$2"
+ cmd_up
+elif [[ $# -eq 2 && $1 == down ]]; then
+ auto_su
+ parse_options "$2"
+ cmd_down
+else
+ cmd_usage
+ exit 1
+fi
+
+exit 0