开发者

Java library for Raw Ethernet [closed]

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 9 years ago.

I'm looking for a Java library that will give me access to raw Ethernet frames, both for reading and sending them. My end goal is to create a BACnet Ethernet network scanner.

Please, Note, I'm not looking for TC开发者_C百科P\IP.

Anyone know of a good library for doing this?


Maybe Jpcap can help. Notice that there's a Sourceforge project with the same name, but it doesn't seem to be the same project.

Here's some sample code (from the library's tutorial) that uses Jpcap to send a TCP packet and an Ethernet frame:

Edit: The sample code does create a TCPPacket, but you may create a regular Packet instead.

//open a network interface to send a packet to
JpcapSender sender=JpcapSender.openDevice(devices[index]);

//create a TCP packet with specified port numbers, flags, and other parameters
TCPPacket p=new TCPPacket(12,34,56,78,false,false,false,false,true,true,true,true,10,10);

//specify IPv4 header parameters
p.setIPv4Parameter(0,false,false,false,0,false,false,false,0,1010101,100,IPPacket.IPPROTO_TCP,
  InetAddress.getByName("www.microsoft.com"),InetAddress.getByName("www.google.com"));

//set the data field of the packet
p.data=("data").getBytes();

//create an Ethernet packet (frame)
EthernetPacket ether=new EthernetPacket();
//set frame type as IP
ether.frametype=EthernetPacket.ETHERTYPE_IP;
//set source and destination MAC addresses
ether.src_mac=new byte[]{(byte)0,(byte)1,(byte)2,(byte)3,(byte)4,(byte)5};
ether.dst_mac=new byte[]{(byte)0,(byte)6,(byte)7,(byte)8,(byte)9,(byte)10};

//set the datalink frame of the packet p as ether
p.datalink=ether;

//send the packet p
sender.sendPacket(p);

sender.close();
0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜