com.acgist.snail.system.config.UtpConfig Maven / Gradle / Ivy
package com.acgist.snail.system.config;
/**
* UTP配置
*
* @author acgist
* @since 1.1.0
*/
public final class UtpConfig {
//================帧类型================//
/**
* 数据
*/
public static final byte ST_DATA = 0;
/**
* 结束
*/
public static final byte ST_FIN = 1;
/**
* 响应
*/
public static final byte ST_STATE = 2;
/**
* 重置
*/
public static final byte ST_RESET = 3;
/**
* 握手
*/
public static final byte ST_SYN = 4;
/**
* 版本
*/
public static final byte UTP_VERSION = 1;
//================消息类型（类型 + 版本）================//
/**
* 消息类型：数据
*/
public static final byte TYPE_DATA = (ST_DATA << 4) | (UTP_VERSION & 0xFF);
/**
* 消息类型：结束
*/
public static final byte TYPE_FIN = (ST_FIN << 4) | (UTP_VERSION & 0xFF);
/**
* 消息类型：响应
*/
public static final byte TYPE_STATE = (ST_STATE << 4) | (UTP_VERSION & 0xFF);
/**
* 消息类型：重置
*/
public static final byte TYPE_RESET = (ST_RESET << 4) | (UTP_VERSION & 0xFF);
/**
* 消息类型：握手
*/
public static final byte TYPE_SYN = (ST_SYN << 4) | (UTP_VERSION & 0xFF);
/**
* 扩展
*/
public static final byte EXTENSION = 0;
/**
* UDP最大包长度：1500 - 20(IP头) - 8(UDP头) = 1472
* UTP最大包长度：1472 - 20(UTP扩展消息头) = 1452
*/
public static final int UTP_PACKET_MAX_LENGTH = 1452;
/**
* 默认窗口大小
*/
public static final int WND_SIZE = 1024 * 1024;
/**
* 最大发送次数
*/
public static final byte MAX_PUSH_TIMES = 3;
/**
* 类型
*/
public static final String type(byte type) {
return
type == ST_DATA ? "DATA" :
type == ST_FIN ? "FIN" :
type == ST_STATE ? "STATE" :
type == ST_RESET ? "RESET" :
type == ST_SYN ? "SYN" : "UNKNOW";
}
}