tcpFastOpen似乎在服务端不生效

[Arrow-Li]

完整性要求

• 我保证阅读了文档，了解所有我编写的配置文件项的含义，而不是大量堆砌看似有用的选项或默认值。
• 我提供了完整的配置文件和日志，而不是出于自己的判断只给出截取的部分。
• 我搜索了 issues, 没有发现已提出的类似问题。
• 问题在 Release 最新的版本上可以成功复现

描述

客户端和服务端版本都是25.5.16，服务器上抓包看SYN请求里有tfo.request但是SYN-ACK里并没有tfo.cookie。/proc/net/netstat里TCPFastOpenPassive也是0
客户端：/proc/sys/net/ipv4/tcp_fastopen : 1
服务器：net.ipv4.tcp_fastopen = 3

重现方式

xhttp auto + reality, 两端都开启tcp fastopen，观察服务器响应包是否包含tfo cookie

客户端配置

{
    "log": {},
    "routing": {},
    "inbounds": [],
    "outbounds": [
        {
            "protocol": "vless",
            "settings": {
                "vnext": [
                    {
                        "address": "",
                        "port": 443,
                        "users": [
                            {
                                "id": "",
                                "encryption": "none"
                            }
                        ]
                    }
                ]
            },
            "streamSettings": {
                "network": "xhttp",
                "security": "reality",
                "realitySettings": {
                    "show": false,
                    "fingerprint": "chrome",
                    "serverName": "",
                    "publicKey": "",
                    "shortId": ""
                },
                "xhttpSettings": {
                    "path": "/",
                    "mode": "auto"
                },
                "sockopt": {
                    "tcpFastOpen": true
                }
            }
        }
    ]
}

服务端配置

{
    "log": {},
    "routing": {},
    "inbounds": [
        {
            "tag": "in",
            "listen": "/dev/shm/xray.socket",
            "port": 8000,
            "protocol": "vless",
            "settings": {
                "clients": [
                    {
                        "id": ""
                    }
                ],
                "decryption": "none"
            },
            "streamSettings": {
                "network": "xhttp",
                "security": "reality",
                "realitySettings": {
                    "show": false,
                    "dest": "",
                    "serverNames": [
                        ""
                    ],
                    "xver": 1,
                    "privateKey": "",
                    "shortIds": [
                        ""
                    ]
                },
                "xhttpSettings": {
                    "path": "/",
                    "mode": "auto"
                },
                "sockopt": {
                    "tcpFastOpen": true
                }
            },
            "sniffing": {
                "enabled": false
            }
        }
    ],
    "outbounds": []
}

客户端日志

N/A

服务端日志

2025/05/19 11:31:44.210420 [Debug] app/log: Logger started
2025/05/19 11:31:44.273562 [Info] app/dns: DNS: created localhost client
2025/05/19 11:31:44.291042 [Debug] app/router: MphDomainMatcher is enabled for 1 domain rule(s)
2025/05/19 11:31:44.593730 [Debug] app/router: MphDomainMatcher is enabled for 122067 domain rule(s)
2025/05/19 11:31:44.593917 [Debug] app/proxyman/inbound: creating unix domain socket worker on /dev/shm/xray.socket
2025/05/19 11:31:44.593990 [Info] transport/internet/splithttp: listening UNIX domain socket for XHTTP on /dev/shm/xray.socket
2025/05/19 11:31:44.594044 [Warning] core: Xray 25.5.16 started

[Fangliding]

uds哪来的tfo。。。。

[Arrow-Li]

服务端 127.0.0.1:8000 一样没有tfo cookie @Fangliding

[Fangliding]

再想想

[Arrow-Li]

再想想

我不理解