Trojan 协议 FallbackObject 中的 name 与 alpn 项不生效

[OrvilleQ]

版本信息

Xray-core Commit: dd67699
Golang Version: 1.17.2

期待结果

根据 VLESS-TCP-XTLS-WHATEVER 模板配置 XTLS 回落至 Trojan 回落至 Nginx。

实际结果

Curl 参数 \ 配置文件	默认回落为 http1.1	默认回落为 h2	无默认回落
-http1.1	√	×(1)	×(2)
-http2	×(1)	√	×(2)

(1) 表现为连接到错误的 http 协议。
(2) 表现为 (52) Empty reply from server，同时程序会产生 app/proxyman/inbound: connection ends > proxy/trojan: failed to find the default "name" config 的错误。

Xray-core/proxy/trojan/server.go

Lines 435 to 437 in 0888296

	if apfb == nil {
	return newError(`failed to find the default "name" config`).AtWarning()
	}

配置文件

05_inbounds.json

{
    "inbounds": [
      {
        "port": 443,
        "protocol": "vless",
        "settings": {
          "clients": [
            {
              "id": "a-client-id",
              "flow": "xtls-rprx-direct",
              "level": 0,
              "email": "a-client@xtls"
            }
          ],
          "decryption": "none",
          "fallbacks": [
            {
              "dest": "8443",
              "xver": 1
            }
          ]
        },
        "streamSettings": {
          "network": "tcp",
          "security": "xtls",
          "xtlsSettings": {
            "alpn": [
              "h2",
              "http/1.1"
            ],
            "certificates": [
              {
                "certificateFile": "/etc/ssl/certs.pem",
                "keyFile": "/etc/ssl/private.pem"
              }
            ]
          }
        }
      },
      {
        "port": 8443,
        "listen": "0.0.0.0",
        "protocol": "trojan",
        "settings": {
          "clients": [
            {
              "password": "a-client-password",
              "level": 0,
              "email": "a-client@trojan"
            }
          ],
          "fallbacks": [
            {
              "name": "a-site.com",
              "dest": "82",
              "xver": 1,
              "alpn": "h2"
            },
            {
              "name": "a-site.com",
              "dest": "80",
              "xver": 1
            },
            {
              "name": "another-site.com",
              "dest": "82",
              "xver": 1,
              "alpn": "h2"
            },
            {
              "name": "another-site.com",
              "dest": "80",
              "xver": 1
            }
          ]
        },
        "streamSettings": {
          "network": "tcp",
          "security": "none",
          "tcpSettings": {
            "acceptProxyProtocol": true
          },
          "tlsSettings": {
            "alpn": [
              "h2",
              "http/1.1"
            ]
          }
        }
      }
    ]
  }

[malikshi]

"alpn": [
"h2",
"http/1.1"
],
Can you try put http/1.1 first then h2

[OrvilleQ]

"alpn": [ "h2", "http/1.1" ], Can you try put http/1.1 first then h2

@malikshi

I have tested your suggestion in different situations, including modifying only xtlsSettings or tlsSettings, or both.

All tests present error type 2 with (52) Empty reply from server and app/proxyman/inbound: connection ends > proxy/trojan: failed to find the default "name" config.

And it can't be a bug related to alpn, at least not yet.

Xray-core/proxy/trojan/server.go

Lines 431 to 445 in 0888296

	if napfb[name] == nil {
	name = ""
	}
	apfb := napfb[name]
	if apfb == nil {
	return newError(`failed to find the default "name" config`).AtWarning()
	}
	if apfb[alpn] == nil {
	alpn = ""
	}
	pfb := apfb[alpn]
	if pfb == nil {
	return newError(`failed to find the default "alpn" config`).AtWarning()
	}

Because the program has not yet executed the code that may throw the alpn-related error.

[malikshi]

I see. Yes it's still catch error when using trojan/xray trojan. I used trojan-go with alpn order that i suggested

[yuhan6665]

v2fly/v2ray-core#1286
应该修好了 如果最新版还不行再报告