[Bug]使用nginx+grpc做服务时，配合有的客户端读取firstpayload超时的话会导致连接被关闭

[lw4free]

Describe the bug【描述 bug】
使用vs做服务器端时，客户端使用v2ray和vs，xshell都连接失败，但使用finalshell却没有问题。
使用v2ray做服务器端时，客户端使用v2ray和vs，xshell都是正常的。

To Reproduce【如何复现该bug】

Expected behavior【预期的行为】
xshell连接正常

Envs (please complete the following information):【系统环境】
服务器端服务器版本：almalinux 8.6 vs版本v1.2.4-beta.3 nginx版本：1.22.0

Config file 【配置文件，客户端服务端配置都提供】
vs配置：

[app]
loglevel = 0
logfile = "/var/log/verysimple/vs_log" 

[[listen]]
tag = "grpc1"
protocol = "vless"
host = "127.0.0.1"
port = 8081
version = -1
advancedLayer = "grpc"
path = "1111"
users = [ {user = "2222"}]

[[dial]]
tag = "direct"
protocol = "direct"

nginx配置：

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    gzip  on;
    resolver 127.0.0.1;
    charset utf-8;

    #include /etc/nginx/conf.d/*.conf;

    map $http_upgrade $connection_upgrade {  
        default upgrade;
        ''      close;
    }

    upstream grpc1.local {
        zone grpc1.local 64k;
        server 127.0.0.1:8081;
        keepalive 600;
    }

    # Settings for a TLS enabled server.

    server {
        listen 443 ssl http2 so_keepalive=on;

        server_name 33333;

        # Load configuration files for the default server block.

        ssl_certificate /etc/ssl/4444/cert.pem;
        ssl_certificate_key /etc/ssl/4444/key.pem;
        ssl_session_timeout 1d;
        ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
        ssl_session_tickets off;

        ssl_dhparam /etc/ssl/4444/dh.pem;

        # intermediate configuration
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
        ssl_prefer_server_ciphers off;

        # OCSP stapling
        ssl_stapling on;
        ssl_stapling_verify on;

        # verify chain of trust of OCSP response using Root CA and Intermediate certs
        ssl_trusted_certificate /etc/ssl/4444/cert.pem;

        location /1111/Tun {
            if ($content_type !~ "application/grpc") {
               return 404;
            }

            client_max_body_size 0;
            client_body_timeout  1d;
            client_body_buffer_size 512k;
            grpc_pass grpc://grpc1.local;
            grpc_read_timeout    1d;
            grpc_send_timeout    1d;
            grpc_socket_keepalive  on;
            grpc_set_header Connection "";
        }

        location / {
            access_log  /var/log/nginx/access.log  web;

            root /usr/share/html;
            index index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
    }
}

与客户端没有关系。

Debug Log 【Debug日志, 客户端 和 服务端 的 日志 都提供】
服务器端log

{"L":"INFO ","T":"221009 044718.780","M":"New Accepted Conn","connid":653428,"from":"127.0.0.1:42992","handler":"tcp+grpc+vless://127.0.0.1:8081#grpc1"}
{"L":"ERROR","T":"221009 044718.881","M":"Failed in reading first payload, not because of timeout, will hung up","connid":653428,"target":"1.2.3.4:22","error":"body closed by handler"}

与客户端没有关系。
Other 【其他】

【注意，配置文件和客户端服务端配置 太长的话，前后加上三个 `, 如 ```】

[lw4free]

服务器端不用grpc，改用ws，使用正常。同时请教如何使用ws+vless 开启fullcone的方法，我在服务器端direct开启fullcone = true并不成功。
服务器端配置

[[listen]]
tag = "proxy1"
protocol = "vless"
host = "127.0.0.1"
port = 8083
version = 1
advancedLayer = "ws"
path = "/***"
early = true
users = [ ***]

[[dial]]
tag = "direct"
protocol = "direct"
fullcone = true

用户端配置

[[listen]]
tag = "tproxy"
protocol = "tproxy"
ip = "0.0.0.0"
port = 3128

[[dial]]
tag = "proxy"
protocol = "vless"
uuid = "***"
host = "127.0.0.1"
port = 6083
version = 1
advancedLayer = "ws"
path = "/***"
early = true

[e1732a364fed]

试试新的代码 解没解决 grpc 的问题

[e1732a364fed]

我猜应该不能完整解决，因为读代码又猜到一处可能导致此问题的地方。 可能来源于 吸收过的clash的旧代码。待我再改一下。

[e1732a364fed]

改好了，在 1eb4568 ， 这回我认为应该搞定了 grpc的问题

[e1732a364fed]

fullcone 的话，你的客户端的 vless v1 以及 服务端的 direct 都要配置 fullcone，说白了，就是双端的 dial 都要配置 fullcone。

先关了，先当解决了。如果测试发现还是有问题再开

[lw4free]

非常感谢