请教 Loopback 协议的使用方法，比如 Freedom 协议 发出的数据能重新路由吗？

[wy16W2pIilK1xgqN]

Loopback 协议的说明只有一句，让人难以理解。
比如 Freedom 协议 发出的数据能重新路由吗？
如果可以希望能给个例子，也方便大家搜索。
🥺

[mydogshitgold]

The term "loopback" means to send the received data back to the sender and, in the context of V2Ray, to route the traffic to the input (the loopback is itself an output).

For example, can the data sent by the Freedom protocol be rerouted?

It doesn't work that way; they are both outbound protocols. Routing in V2Ray works by inbounds to outbounds, or outbounds to inbounds via loopback.

Loopback is mostly useful when used with Dokodemo-door

e.g. : I have two inbounds:

• http_proxy which uses http protocol
• quad_one which uses dokodemo-door protocol
  And two outbounds:
• out, what protocol does it uses does not matter here.
• lo, which uses the loopback protocol. and it's reentry point is http_proxy

Then I can create following route with loopback:

• qouad_one (inbound) <-> lo (outbound) <-> http_proxy (inbound) <-> out (outbound)

---

Here is an example configuration

{
  "log": {
    "loglevel": "info"
  },
  "inbounds": [
    {
      "tag": "http_proxy",
      "protocol": "http",
      "listen": "127.2.2.2",
      "port": 2222
    },
    {
      "tag": "vmess_proxy",
      "protocol": "vmess",
      "listen": "/dev/shm/vmess.sock",
      "settings": {
        "clients": [
          {
            "id": "a4c089b7-201a-4e4c-8786-2ba9f2e27a9c"
          }
        ]
      }
    },
    {
      "tag": "quad_one",
      "protocol": "dokodemo-door",
      "listen": "127.1.1.1",
      "port": 1111,
      "settings": {
        "address": "1.1.1.1",
        "port": 80
      }
    },
    {
      "tag": "google",
      "protocol": "dokodemo-door",
      "listen": "127.8.8.8",
      "port": 8888,
      "settings": {
        "address": "google.com",
        "port": 80
      }
    }
  ],
  "outbounds": [
    {
      "tag": "lo1",
      "protocol": "loopback",
      "settings": {
        "inboundTag": "http_proxy"
      }
    },
    {
      "tag": "lo2",
      "protocol": "loopback",
      "settings": {
        "inboundTag": "vmess_proxy"
      }
    },
    {
      "tag": "direct",
      "protocol": "freedom"
    }
  ],
  "routing": {
    "rules": [
      {
        "outboundTag": "lo1",
        "inboundTag": [
          "quad_one"
        ],
        "type": "field"
      },
      {
        "outboundTag": "lo2",
        "inboundTag": [
          "google"
        ],
        "type": "field"
      },
      {
        "outboundTag": "direct",
        "inboundTag": [
          "http_proxy",
          "vmess_proxy"
        ],
        "type": "field"
      }
    ]
  }
}

After V2Ray is started, try

curl 127.1.1.1:1111 -H 'Host: 1.1.1.1'

and

curl 127.8.8.8.8:8888 -H 'Host: google.com'

Then have a look at what happens and try to make sense of V2Ray's log.

[wy16W2pIilK1xgqN]

我明白了，😊
非常感谢您的帮助。
💐