Java Docker容器之间的SCTP连接挂起

我在设置Docker容器、通过SCTP进行通信时遇到了一些问题。所有相关文件如下

运行docker compose up后，以下是输出：

$ docker-compose up
Starting server ... done
Starting client ... done 
Attaching to server, client
server    | Opening SctpServerChannel...
server    | Binding to: server/172.18.0.2:3868
server    | Waiting for new connection....
client    | Opening SctpChannel...
client    | Binding to: client/172.18.0.3:0
client    | Connecting to: server/172.18.0.2:3868

客户端从未成功连接到服务器（同样，服务器也从未接收到客户端的连接）

src/SctpClient.java

import java.io.IOException;
import java.net.InetSocketAddress;

import com.sun.nio.sctp.SctpChannel;

public class SctpClient 
{
    public static void main(String[] args) throws IOException 
    {
        String[] parts = args[0].split(":");
        InetSocketAddress local = new InetSocketAddress(parts[0], Integer.parseInt(parts[1]));

        parts = args[1].split(":");
        InetSocketAddress remote = new InetSocketAddress(parts[0], Integer.parseInt(parts[1]));

        System.out.println("Opening SctpChannel...");
        SctpChannel client = SctpChannel.open();

        System.out.println("Binding to: "+local);
        client.bind(local);

        System.out.println("Connecting to: "+remote);
        if (client.connect(remote))
            System.out.println("Connected!");           
        else
            System.out.println("Connection failed!");
    }
}

import java.io.IOException;
import java.net.InetSocketAddress;

import com.sun.nio.sctp.SctpChannel;
import com.sun.nio.sctp.SctpServerChannel;

public class SctpServer 
{
    public static void main(String[] args) throws IOException 
    {
        String[] parts = args[0].split(":");
        InetSocketAddress local = new InetSocketAddress(parts[0], Integer.parseInt(parts[1]));

        System.out.println("Opening SctpServerChannel...");
        SctpServerChannel server = SctpServerChannel.open();

        System.out.println("Binding to: "+local);
        server.bind(local);

        System.out.println("Waiting for new connection....");
        while (true)
        {
            SctpChannel client = server.accept();
            if (client == null)
                System.out.println("Connection failed!");
            else
                System.out.println("Connected: "+client.getRemoteAddresses());
        }
    }
}

src/SctpServer.java

import java.io.IOException;
import java.net.InetSocketAddress;

import com.sun.nio.sctp.SctpChannel;

public class SctpClient 
{
    public static void main(String[] args) throws IOException 
    {
        String[] parts = args[0].split(":");
        InetSocketAddress local = new InetSocketAddress(parts[0], Integer.parseInt(parts[1]));

        parts = args[1].split(":");
        InetSocketAddress remote = new InetSocketAddress(parts[0], Integer.parseInt(parts[1]));

        System.out.println("Opening SctpChannel...");
        SctpChannel client = SctpChannel.open();

        System.out.println("Binding to: "+local);
        client.bind(local);

        System.out.println("Connecting to: "+remote);
        if (client.connect(remote))
            System.out.println("Connected!");           
        else
            System.out.println("Connection failed!");
    }
}

import java.io.IOException;
import java.net.InetSocketAddress;

import com.sun.nio.sctp.SctpChannel;
import com.sun.nio.sctp.SctpServerChannel;

public class SctpServer 
{
    public static void main(String[] args) throws IOException 
    {
        String[] parts = args[0].split(":");
        InetSocketAddress local = new InetSocketAddress(parts[0], Integer.parseInt(parts[1]));

        System.out.println("Opening SctpServerChannel...");
        SctpServerChannel server = SctpServerChannel.open();

        System.out.println("Binding to: "+local);
        server.bind(local);

        System.out.println("Waiting for new connection....");
        while (true)
        {
            SctpChannel client = server.accept();
            if (client == null)
                System.out.println("Connection failed!");
            else
                System.out.println("Connected: "+client.getRemoteAddresses());
        }
    }
}

docker compose.yml

version: '3.7'
services:

        server:
                build:
                        context: .
                        dockerfile: Dockerfile-Server
                image: server
                container_name: server
                restart: unless-stopped
                environment:
                        - LOCAL_IFACE=server:3868
                ports:
                        - "3868:3868/sctp"
                networks:
                        - sctp

        client:
                build:
                        context: .
                        dockerfile: Dockerfile-Client
                image: client
                container_name: client
                restart: unless-stopped
                environment:
                        - LOCAL_IFACE=client:0
                        - REMOTE_IFACE=server:3868
                networks:
                        - sctp
                depends_on:
                        - server
                stdin_open: true
                tty: true

networks:
        sctp:
                name: sctp

Dockerfile客户端

FROM openjdk:11-jdk
RUN apt-get update -y && apt-get install lksctp-tools -y && apt-get clean
WORKDIR /opt
COPY src/SctpClient.java .
CMD java SctpClient.java $LOCAL_IFACE $REMOTE_IFACE

Dockerfile服务器

FROM openjdk:11-jdk
RUN apt-get update -y && apt-get install lksctp-tools -y && apt-get clean
WORKDIR /opt
COPY src/SctpServer.java .
CMD java SctpServer.java $LOCAL_IFACE

---

有人有什么建议吗？

我想经过这么长时间之后，我应该发布我是如何让它工作的：

有趣的是，从docker-compose.yml中删除端口的发布允许容器之间的SCTP工作。这与TCP的工作方式不同

此外，如果您希望主机网络上的应用程序通过SCTP与容器通信，则必须使用主机网络。这与TCP的工作方式也不同

---

在最初发布文章时，docker对SCTP的支持似乎还很原始。

根据，我必须安装此版本的docker compose，以使其接受yml文件中的SCTP端口，但连接仍然挂起：如果这是一个bug，我已经在docker的GitHub上打开了一张罚单：