修复tcp数据包解析问题

src/JT1078.Gateway.Tests/JT1078.Gateway.Test/PipeTest.cs

@@ -12,6 +12,7 @@ using JT1078.Protocol.Enums;
 using System.Linq;
 using System.Text;
 using System.IO;
+using System.Runtime.InteropServices;
 
 namespace JT1078.Gateway.Test
 {
@@ -355,7 +356,7 @@ namespace JT1078.Gateway.Test
                 if (seqReader.End) break;
             }
 
-        }   
+        }
 
         [Fact]
         public void Test2()

src/JT1078.Gateway.Tests/JT1078.Gateway.TestNormalHosting/Configs/nlog.Unix.config

@@ -29,7 +29,7 @@
     </target>
   </targets>
   <rules>
-    <logger name="*" minlevel="Trace" writeTo="all"/>
+    <logger name="*" minlevel="Error" writeTo="all"/>
     <logger name="JT1078.Gateway.TestNormalHosting.Services.JT1078FlvNormalMsgHostedService" minlevel="Trace" writeTo="JT1078FlvNormalMsgHostedService"/>
     <logger name="JT1078.Gateway.JT1078TcpServer" minlevel="Trace" writeTo="JT1078TcpServer"/>
     <logger name="JT1078Logging" minlevel="Trace" writeTo="JT1078Logging"/>

src/JT1078.Gateway.Tests/JT1078.Gateway.TestNormalHosting/Configs/nlog.Win32NT.config

@@ -37,7 +37,7 @@
       </target>
     </targets>
     <rules>
-      <logger name="*" minlevel="Trace" writeTo="all,console"/>
+      <logger name="*" minlevel="Error" writeTo="all,console"/>
       <logger name="JT1078.Gateway.JT1078TcpServer" minlevel="Trace" writeTo="JT1078TcpServer,console"/>
       <logger name="JT1078Logging" minlevel="Trace" writeTo="JT1078Logging,console"/>
     </rules>

src/JT1078.Gateway/JT1078TcpServer.cs

@@ -6,6 +6,7 @@ using System.IO.Pipelines;
 using System.Linq;
 using System.Net;
 using System.Net.Sockets;
+using System.Security.Cryptography;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
@@ -40,6 +41,8 @@ namespace JT1078.Gateway
 
         private readonly JT1078UseType jT1078UseType;
 
+        private long Counter = 0;
+
         /// <summary>
         /// 使用正常方式
         /// </summary>
@@ -204,11 +207,13 @@ namespace JT1078.Gateway
         }
         private void ReaderBuffer(ref ReadOnlySequence<byte> buffer, FixedHeaderInfo fixedHeaderInfo, JT1078TcpSession session, out SequencePosition consumed, out SequencePosition examined)
         {
+            consumed = buffer.Start;
+            examined = buffer.End;
             SequenceReader<byte> seqReader = new SequenceReader<byte>(buffer);
             long totalConsumed = 0;
             while (!seqReader.End)
             {
-                if (seqReader.Remaining < 30)
+                if (seqReader.Length < 30)
                 {
                     fixedHeaderInfo.Reset();
                     break;
@@ -216,39 +221,24 @@ namespace JT1078.Gateway
                 if (!fixedHeaderInfo.FoundHeader)
                 {
                     var header = seqReader.Sequence.Slice(0, 4);
-                    var headerValue = BinaryPrimitives.ReadUInt32BigEndian(header.FirstSpan);
+                    uint headerValue = BinaryPrimitives.ReadUInt32BigEndian(header.ToArray());
                     if (JT1078Package.FH == headerValue)
                     {
                         //sim
-                        fixedHeaderInfo.SIM = ReadBCD(seqReader.Sequence.Slice(8, 6).FirstSpan, 12);
                         if (string.IsNullOrEmpty(fixedHeaderInfo.SIM))
                         {
-                            fixedHeaderInfo.SIM = session.SessionID;
+                            fixedHeaderInfo.SIM = ReadBCD(seqReader.Sequence.Slice(8, 6).ToArray(), 12);
+                            fixedHeaderInfo.SIM = fixedHeaderInfo.SIM ?? session.SessionID;
                         }
                         //根据数据类型处理对应的数据长度
                         fixedHeaderInfo.TotalSize += 15;
                         var dataType = seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize, 1).FirstSpan[0];
                         fixedHeaderInfo.TotalSize += 1;
-                        JT1078Label3 label3 = new JT1078Label3(dataType);
+                        int bodyLength = GetRealDataBodyLength(dataType);
-                        int bodyLength = 0;
-                        //透传的时候没有该字段
-                        if (label3.DataType != JT1078DataType.透传数据)
-                        {
-                            //时间戳
-                            bodyLength += 8;
-                        }
-                        //非视频帧时没有该字段
-                        if (label3.DataType == JT1078DataType.视频I帧 ||
-                            label3.DataType == JT1078DataType.视频P帧 ||
-                            label3.DataType == JT1078DataType.视频B帧)
-                        {
-                            //上一个关键帧 + 上一帧 = 2 + 2
-                            bodyLength += 4;
-                        }
                         fixedHeaderInfo.TotalSize += bodyLength;
-                        var bodyLengthFirstSpan = seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize, 2).FirstSpan;
+                        var bodyLengthFirstSpan = seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize, 2).ToArray();
-                        //数据体长度
                         fixedHeaderInfo.TotalSize += 2;
+                        //数据体长度
                         bodyLength = BinaryPrimitives.ReadUInt16BigEndian(bodyLengthFirstSpan);
                         if (bodyLength < 0)
                         {
@@ -257,8 +247,8 @@ namespace JT1078.Gateway
                         }
                         if (bodyLength == 0)//数据体长度为0
                         {
-                            seqReader.Advance(fixedHeaderInfo.TotalSize);
                             var package1 = seqReader.Sequence.Slice(0, fixedHeaderInfo.TotalSize).ToArray();
+                            seqReader.Advance(fixedHeaderInfo.TotalSize);
                             if (LogLogger.IsEnabled(LogLevel.Trace))
                             {
                                 LogLogger.LogTrace($"{package1.ToHexString()}");
@@ -283,7 +273,11 @@ namespace JT1078.Gateway
                             finally
                             {
                                 totalConsumed += seqReader.Consumed;
+                                seqReader = new SequenceReader<byte>(seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize));
                                 fixedHeaderInfo.Reset();
+#if DEBUG
+                                Interlocked.Increment(ref Counter);
+#endif
                             }
                             continue;
                         }
@@ -297,12 +291,12 @@ namespace JT1078.Gateway
                         throw new ArgumentException("not JT1078 package.");
                     }
                 }
-                if ((seqReader.Remaining - fixedHeaderInfo.TotalSize) < 0) break;
+                if ((seqReader.Length - fixedHeaderInfo.TotalSize) < 0) break;
-                seqReader.Advance(fixedHeaderInfo.TotalSize);
                 var package = seqReader.Sequence.Slice(0, fixedHeaderInfo.TotalSize).ToArray();
+                seqReader.Advance(fixedHeaderInfo.TotalSize);
                 if (LogLogger.IsEnabled(LogLevel.Trace))
                 {
-                    LogLogger.LogTrace($"{package.ToHexString()}");
+                    LogLogger.LogTrace($"===>{package.ToHexString()}");
                 }
                 try
                 {
@@ -324,9 +318,18 @@ namespace JT1078.Gateway
                 finally
                 {
                     totalConsumed += seqReader.Consumed;
+                    seqReader = new SequenceReader<byte>(seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize));
                     fixedHeaderInfo.Reset();
-                    seqReader = new SequenceReader<byte>(seqReader.Sequence.Slice(seqReader.Consumed));
+#if DEBUG
+                    Interlocked.Increment(ref Counter);
+#endif
+                }
+#if DEBUG
+                if (Logger.IsEnabled(LogLevel.Trace))
+                {
+                    Logger.LogTrace($"======>{Counter}");
                 }
+#endif
             }
             if (seqReader.End)
             {
@@ -335,7 +338,6 @@ namespace JT1078.Gateway
             else
             {
                 consumed = buffer.GetPosition(totalConsumed);
-                examined = buffer.End;
             }
         }
         public Task StopAsync(CancellationToken cancellationToken)
@@ -367,7 +369,26 @@ namespace JT1078.Gateway
             }
             return bcdSb.ToString().TrimStart('0');
         }
-
+        int GetRealDataBodyLength(byte dataType)
+        {
+            JT1078Label3 label3 = new JT1078Label3(dataType);
+            int bodyLength = 0;
+            //透传的时候没有该字段
+            if (label3.DataType != JT1078DataType.透传数据)
+            {
+                //时间戳
+                bodyLength += 8;
+            }
+            //非视频帧时没有该字段
+            if (label3.DataType == JT1078DataType.视频I帧 ||
+                label3.DataType == JT1078DataType.视频P帧 ||
+                label3.DataType == JT1078DataType.视频B帧)
+            {
+                //上一个关键帧 + 上一帧 = 2 + 2
+                bodyLength += 4;
+            }
+            return bodyLength;
+        }
         class FixedHeaderInfo
         {
             public bool FoundHeader { get; set; }