Adapt README to new interface

README.md

@@ -12,22 +12,25 @@ cargo build --release
 ## Setup
 A standard setup, which would route all traffic from your system through the tunnel interface, could look as follows:
 ```shell
-# Define the proxy endpoint.
+# The proxy type can be either SOCKS5 or HTTP.
+PROXY_TYPE=SOCKS5
 PROXY_IP=1.2.3.4
 PROXY_PORT=1080
 
-# Create a tunnel interface named tun0 which your user can bind to, so we don't need to run tun2proxy as root.
+# Create a tunnel interface named tun0 which your user can bind to,
+# so we don't need to run tun2proxy as root.
 sudo ip tuntap add name tun0 mode tun user $USER
 sudo ip link set tun0 up
 
-# To prevent a routing loop, we add a route to the proxy server that behaves like the default route.
+# To prevent a routing loop, we add a route to the proxy server that behaves
+# like the default route.
 sudo ip route add "$PROXY_IP" $(ip route | grep '^default' | cut -d ' ' -f 2-)
 
 # Route all your traffic through tun0 without interfering with the default route.
 sudo ip route add 128.0.0.0/1 dev tun0
 sudo ip route add 0.0.0.0/1 dev tun0
 
-./target/release/tun2proxy --tun tun0 --proxy socks5 --addr "$PROXY_IP:$PROXY_PORT"
+./target/release/tun2proxy --tun tun0 --proxy "$PROXY_TYPE://$PROXY_IP:$PROXY_PORT"
 ```
 
 Note that if you paste these commands into a shell script, which you then run with `sudo`, you might want to replace
@@ -36,49 +39,27 @@ Note that if you paste these commands into a shell script, which you then run wi
 For DNS to work, you might need an additional tool like [dnsproxy](https://github.com/AdguardTeam/dnsproxy) that is
 configured to listen on a local UDP port and communicates with the upstream DNS server via TCP.
 
-## CLI
+When you terminate this program and want to eliminate the impact caused by the above several commands,
-=======
+you can execute the following command. The routes will be automatically deleted with the tunnel device.
-When you end the running of this program and want to eliminate the impact caused by the above several commands,
-you can execute the following commands.
 ```shell
-sudo ip route del 0.0.0.0/1 dev tun0
+sudo ip link del tun0
-sudo ip route del 128.0.0.0/1 dev tun0
-sudo ip link set tun0 down
-sudo ip tuntap del tun0 mode tun
 ```
 
 ## CLI
 ```
 Tunnel interface to proxy.
 
-Usage: tun2proxy [OPTIONS] --tun <name> --proxy <type> --addr <ip:port>
+Usage: tun2proxy [OPTIONS] --proxy <URL>
 
 Options:
-  -t, --tun <name>
+  -t, --tun <name>   Name of the tun interface [default: tun0]
-          Name of the tun interface
+  -p, --proxy <URL>  The proxy URL in the form proto://[username[:password]@]host:port
-
+  -h, --help         Print help
-  -p, --proxy <type>
+  -V, --version      Print version
-          What proxy type to run
-
-          Possible values:
-          - socks5: SOCKS5 server to use
-          - http:   HTTP server to use
-
-  -a, --addr <ip:port>
-          Server address with format ip:port
-
-      --username <username>
-          Username for authentication
-
-      --password <password>
-          Password for authentication
-
-  -h, --help
-          Print help (see a summary with '-h')
-
-  -V, --version
-          Print version
 ```
+Currently, tun2proxy supports two proxy protocols: HTTP and SOCKS5. A proxy is supplied to the `--proxy` argument in the
+URL format. For example, an HTTP proxy at 1.2.3.4:1080 with a username of `john.doe` and a password of `secret` is
+supplied as `--proxy http://john.doe:secret@1.2.3.4:1080`. This works analogously to curl's `--proxy` argument.
 
 ## TODO
 - UDP support for SOCKS

src/main.rs

@@ -14,8 +14,8 @@ struct Args {
     #[arg(short, long, value_name = "name", default_value = "tun0")]
     tun: String,
 
-    /// What proxy type to run
+    /// The proxy URL in the form proto://[username[:password]@]host:port
-    #[arg(short, long = "proxy", value_parser = proxy_url_parser)]
+    #[arg(short, long = "proxy", value_parser = proxy_url_parser, value_name = "URL")]
     proxy: ArgProxy,
 }