tcppacket.java

Java抓包必备

package jpcap;

/**
* TCP僷働僢僩傪昞尰偡傞僋儔僗偱偡
*/
public class TCPPacket extends IPPacket
{
	/**
	 * 憲怣尦億乕僩
	 */
	public int src_port;
	/**
	 * 憲怣愭億乕僩
	 */
	public int dst_port;
	/**
	 * 僔乕働儞僗斣崋
	 */
	public long sequence;
	/**
	 * ACK斣崋
	 */
	public long ack_num;
	/**
	 * URG僼儔僌: 嬞媫僨乕僞乮桪愭憲怣梫媮乯
	 */
	public boolean urg;
	/**
	 * ACK僼儔僌: ACK斣崋僼傿乕儖僪桳岠
	 */
	public boolean ack;
	/**
	 * PSH僼儔僌: PUSH乮嫮惂憲怣乯梫媮
	 */
	public boolean psh;
	/**
	 * RST僼儔僌: 嫮惂愗抐梫媮
	 */
	public boolean rst;
	/**
	 * SYN僼儔僌: 僔乕働儞僗斣崋偺摨婜梫媮
	 */
	public boolean syn;
	/**
	 * FIN僼儔僌: 憲怣廔椆梫媮
	 */
	public boolean fin;
	/**
	 * 僂傿儞僪僂乮庴怣僶僢僼傽巆傝僶僀僩悢乯
	 */
	public int window;
	/**
	 * 嬞媫億僀儞僞
	 */
	public short urgent_pointer;

	/**
	* TCP僆僾僔儑儞
	**/
	public byte[] option;

	/**
	 * TCP僷働僢僩偺僆僽僕僃僋僩傪惗惉偟傑偡
	 *
	 * @param src_port 憲怣尦億乕僩斣崋
	 * @param dst_port 憲怣愭億乕僩斣崋
	 * @param sequence 僔乕働儞僗斣崋
	 * @param ack_num ACK斣崋
	 * @param urg URG僼儔僌: 嬞媫僨乕僞乮桪愭憲怣梫媮乯
	 * @param ack ACK僼儔僌: ACK斣崋僼傿乕儖僪桳岠
	 * @param psh PSH僼儔僌: PUSH乮嫮惂憲怣乯梫媮
	 * @param rst RST僼儔僌: 嫮惂愗抐梫媮
	 * @param syn SYN僼儔僌: 僔乕働儞僗斣崋偺摨婜梫媮
	 * @param fin FIN僼儔僌: 憲怣廔椆梫媮
	 * @param window 僂傿儞僪僂僒僀僘
	 * @param urgent 嬞媫億僀儞僞
	 */
	public TCPPacket(int src_port,int dst_port,long sequence,long ack_num,
					 boolean urg,boolean ack,boolean psh,boolean rst,
					 boolean syn,boolean fin,int window,int urgent){
		this.src_port=src_port;this.dst_port=dst_port;
		this.sequence=this.sequence;
		this.ack_num=ack_num;
		this.urg=urg;this.ack=ack;this.psh=psh;this.rst=rst;
		this.syn=syn;this.fin=fin;
		this.window=window;
		urgent_pointer=(short)urgent;
	}

	void setValue(int src,int dst,long seq,long ack_num,boolean urg,boolean ack,
	      boolean psh,boolean rst,boolean syn,boolean fin,int win,short urp){
    src_port=src;dst_port=dst;
    sequence=seq;
    this.ack_num=ack_num;
    this.urg=urg;this.ack=ack;this.psh=psh;this.rst=rst;this.syn=syn;this.fin=fin;
    window=win;
	urgent_pointer=urp;
  }
  
  void setOption(byte[] option){
		this.option=option;
	}

  /**
  * 偙偺僷働僢僩偺撪梕傪暥帤楍偱昞尰偟傑偡<BR>
  *
  * <BR>
  * 宍幃: src_port > dst_port seq(sequence) win(window) [ack ack_num] [S][F][P]
  */
	public String toString(){
		return super.toString()+" TCP "+
			src_port+" > "+dst_port+" seq("+sequence+
			") win("+window+")"+(ack?" ack "+ack_num:"")+" "+
			(syn?" S":"")+(fin?" F":"")+(psh?" P":"")+
			(rst?" R":"")+(urg?" U":"");
	}
}