tcpconstants.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 60 行

/*
 * $Id: TCPConstants.java,v 1.1 2003/11/25 11:52:23 epr Exp $
 */
package org.jnode.net.ipv4.tcp;

/**
 * @author epr
 */
public interface TCPConstants {

	/** Length of TCP header length in bytes, without any options */
	public static final int TCP_HLEN = 20;

	/** Default Time to Live for TCP packets */
	public static final int TCP_DEFAULT_TTL = 64;

	/** Default timeout for blocking operations (in ms) */
	public static final int TCP_DEFAULT_TIMEOUT = 10000;

	/** Maximum TCP window size */
	public static final int TCP_MAXWIN = 1024;
	
	/** Default Maximum Segment Size */
	public static final int TCP_DEFAULT_MSS = 536;
	
	/** The default buffer size */
	public static final int TCP_BUFFER_SIZE = 8*1024;

	/** The maximum connect attempts */
	public static final int TCP_MAXCONNECT = 3;
	
	/** Interval bewteen timer events */
	public static final int TCP_TIMER_PERIOD = 500;

	// TCP flags
	public static final int TCPF_FIN = 0x0001;
	public static final int TCPF_SYN = 0x0002;
	public static final int TCPF_RST = 0x0004;
	public static final int TCPF_PSH = 0x0008;
	public static final int TCPF_ACK = 0x0010;
	public static final int TCPF_URG = 0x0020;

	// TCP Connection states
	public static final int TCPS_CLOSED = 0x0001;
	public static final int TCPS_LISTEN = 0x0002;
	public static final int TCPS_SYN_RECV = 0x0003;
	public static final int TCPS_SYN_SENT = 0x0004;
	public static final int TCPS_ESTABLISHED = 0x0005;
	public static final int TCPS_CLOSE_WAIT = 0x0006;
	public static final int TCPS_LAST_ACK = 0x0007;
	public static final int TCPS_FIN_WAIT_1 = 0x0008;
	public static final int TCPS_FIN_WAIT_2 = 0x0009;
	public static final int TCPS_CLOSING = 0x000a;
	public static final int TCPS_TIME_WAIT = 0x000b;

	public static final String TCP_STATE_NAMES[] =
		{ "?", "CLOSED", "LISTEN", "SYN_RECV", "SYN_SENT", "ESTABLISHED", "CLOSE_WAIT", "LAST_ACK", "FIN_WAIT_1", "FIN_WAIT_2", "CLOSING", "TIME_WAIT" };

}