beginning async version (#84)

scripts/linux.sh

@@ -0,0 +1,66 @@
+#! /usr/bin/bash -x
+
+# Please set the following parameters according to your environment
+# BYPASS_IP=123.45.67.89
+PROXY_IP=127.0.0.1
+PROXY_PORT=1080
+PROXY_TYPE=SOCKS5
+
+function core_function() {
+    local is_envonly="${1}"
+    local bypass_ip="${2}"
+
+    sudo ip tuntap add name tun0 mode tun
+    sudo ip link set tun0 up
+
+    sudo ip route add "${bypass_ip}" $(ip route | grep '^default' | cut -d ' ' -f 2-)
+
+    sudo ip route add 128.0.0.0/1 dev tun0
+    sudo ip route add 0.0.0.0/1 dev tun0
+
+    sudo ip route add ::/1 dev tun0
+    sudo ip route add 8000::/1 dev tun0
+
+    sudo sh -c "echo nameserver 198.18.0.1 > /etc/resolv.conf"
+
+    if [ "$is_envonly" = true ]; then
+        read -n 1 -s -r -p "Don't do anything. If you want to exit and clearup environment, press any key..."
+        echo ""
+        restore
+    else
+        trap 'echo "" && echo "tun2proxy exited with code: $?" && restore' EXIT
+        local SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+        local APP_BIN_PATH="${SCRIPT_DIR}/../target/release/tun2proxy"
+        "${APP_BIN_PATH}" --tun tun0 --proxy "${PROXY_TYPE}://${PROXY_IP}:${PROXY_PORT}" -v trace
+    fi
+}
+
+function restore() {
+    sudo ip link del tun0
+    sudo systemctl restart systemd-resolved.service
+}
+
+function main() {
+    local action=${1}
+    # [ -z ${1} ] && action="envonly"
+
+    local bypass_ip=${2}
+    # [ -z ${2} ] && bypass_ip="123.45.67.89"
+
+    case "${action}" in
+        envonly)
+            core_function true "${bypass_ip}"
+            ;;
+        tun2proxy)
+            core_function false "${bypass_ip}"
+            ;;
+        *)
+            echo "Arguments error! [${action}]"
+            echo "Usage: `basename $0` [envonly|tun2proxy] [bypass_ip]"
+            ;;
+    esac
+
+    exit 0
+}
+
+main "$@"