Add documentation and example for linux tun

docs/examples/index.md

@@ -3,4 +3,5 @@
 Configuration examples for sing-box.
 
 * [Shadowsocks Server](./ss-server)
-* [Shadowsocks Client](./ss-client)
+* [Shadowsocks Client](./ss-client)
+* [Shadowsocks Tun](./ss-tun)

docs/examples/ss-tun.md

@@ -0,0 +1,66 @@
+```json
+{
+  "dns": {
+    "servers": [
+      {
+        "tag": "google",
+        "address": "tls://8.8.8.8"
+      },
+      {
+        "tag": "local",
+        "address": "223.5.5.5",
+        "detour": "direct"
+      }
+    ],
+    "rules": [
+      {
+        "domain": "mydomain.com",
+        "geosite": "cn",
+        "server": "local"
+      }
+    ],
+    "strategy": "ipv4_only"
+  },
+  "inbounds": [
+    {
+      "type": "tun",
+      "inet4_address": "172.19.0.1/30",
+      "auto_route": true,
+      "hijack_dns": true,
+      "sniff": true
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "shadowsocks",
+      "tag": "proxy",
+      "server": "mydomain.com",
+      "server_port": 8080,
+      "method": "2022-blake3-aes-128-gcm",
+      "password": "8JCsPssfgS8tiRwiMlhARg=="
+    },
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "block",
+      "tag": "block"
+    }
+  ],
+  "route": {
+    "rules": [
+      {
+        "geosite": "category-ads-all",
+        "outbound": "block"
+      },
+      {
+        "geosite": "cn",
+        "geoip": "cn",
+        "outbound": "direct"
+      }
+    ],
+    "auto_detect_interface": true
+  }
+}
+```