java - How to send Ethernet-Frames in Java without TCP/IP Stack

Question

My Java application should control an external device (EtherCAT Bus technology) directly connected to the network interface of my computer(Ubuntu and Windows). No other network devices are connected. The communication has do be done on Standard IEEE 802.3 Ethernet Frames without IP stack.

Example for sending data:

int etherType =  0x88A4;  // the EtherType registered by IEEE
byte[] macBroadcast = new byte[] {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
byte[] macSource = new byte[] ... ;  // MAC Address of my network interface card
byte[] buffer = ... // the data to send

device.write(macSource, macBroadcast, etherType, buffer);

I tried JNetPcap, which uses the pcap native library. The given API was fine, but there were multithreading issues on heavy load, which forced me to give up.

netty.io was also a candidate. I am not sure, but a TCP/IP stack is mandatory. Am I right?

Are there other ideas to communicate with low level Ethernet Frames? I would prefer a pure java library like netty.io, if one exists.

Of course JNA/JNI is an option, too. But I don't want to write C code.

Other alternatives?

Answer 1

这些是我能够找到的选项：

• jNetPcap 是 Java 的 libpcap 包装器 - http://jnetpcap.com/
• Jpcap 是 Java 的另一个 libpcap 包装器 - https://github.com/mgodave/Jpcap
• RockSaw 是一个使用“原始套接字”发送和接收 IPv4 和 IPv6 数据包的库 - http://www.savarese.org/software/rocksaw/。据我所知，它非常有限，自 2007 年以来就没有被触及过。
• Netutils 使用 libpcap 和 libnet - http://code.google.com/p/netutils/

我还看到评论说 jNetPcap 应该是线程安全的，但实际上它不是；即当与多个线程一起使用时它是错误的。