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update 电单车协议

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Guoqs
2024-07-15 15:07:38 +08:00
parent ebf5259a6f
commit 61b948aea9
4 changed files with 184 additions and 5 deletions
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20
jsowell-netty/src/main/java/com/jsowell/netty/decoder/StartAndLengthFieldFrameDecoder.java
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@@ -13,6 +13,9 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
private static final int HEADER_LENGTH_DNY = 3; // "DNY" 包头的长度
private static final int HEADER_LENGTH_68 = 1; // 68 包头的长度
// 构造函数，初始化起始标志
public StartAndLengthFieldFrameDecoder() {}
// 起始标志
// private int HEAD_DATA;
@@ -88,6 +91,7 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
// 记录包头开始的index
int beginReader;
// 循环查找包头
while (true) {
if (buffer.readableBytes() < Math.min(HEADER_LENGTH_DNY, HEADER_LENGTH_68)) {
return; // 数据长度不足，等待更多数据
@@ -102,9 +106,9 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
// break;
// }
// 读到了协议的开始标志，结束while循环
// 判断是否为DNY包头或68包头
if (isStartOfDnyHeader(buffer, beginReader) || isStartOf68Header(buffer, beginReader)) {
break;
break; // 读到了协议的开始标志，结束while循环
}
// 未读到包头，略过一个字节
@@ -138,6 +142,7 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
buffer.resetReaderIndex();
}
// 判断是否为DNY包头
private boolean isStartOfDnyHeader(ByteBuf buffer, int beginReader) {
if (buffer.readableBytes() >= HEADER_LENGTH_DNY) {
byte[] headerBytes = new byte[HEADER_LENGTH_DNY];
@@ -148,6 +153,7 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
return false;
}
// 判断是否为68包头
private boolean isStartOf68Header(ByteBuf buffer, int beginReader) {
if (buffer.readableBytes() >= HEADER_LENGTH_68) {
return buffer.getUnsignedByte(beginReader) == 0x68;
@@ -155,14 +161,17 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
return false;
}
// 处理68协议消息
private void decode68Message(ByteBuf buffer, List<Object> out, int beginReader) {
// 检查剩余数据是否足够
if (buffer.readableBytes() < HEADER_LENGTH_68 + 1) {
buffer.readerIndex(beginReader);
return;
}
// 消息的长度
// 获取消息长度
int length = buffer.getUnsignedByte(beginReader + HEADER_LENGTH_68);
// 检查剩余数据是否足够
if (buffer.readableBytes() < HEADER_LENGTH_68 + 1 + length) {
buffer.readerIndex(beginReader);
return;
@@ -174,14 +183,17 @@ public class StartAndLengthFieldFrameDecoder extends ByteToMessageDecoder {
out.add(frame);
}
// 处理DNY协议消息
private void decodeDnyMessage(ByteBuf buffer, List<Object> out, int beginReader) {
// 检查剩余数据是否足够
if (buffer.readableBytes() < HEADER_LENGTH_DNY + 1) {
buffer.readerIndex(beginReader);
return;
}
// 消息的长度
// 获取消息长度
int length = buffer.getUnsignedByte(beginReader + HEADER_LENGTH_DNY);
// 检查剩余数据是否足够
if (buffer.readableBytes() < HEADER_LENGTH_DNY + 1 + length) {
buffer.readerIndex(beginReader);
return;