Map unrecognized file types to 'WeirdFile' instead of throwing.

README.md

@@ -494,6 +494,7 @@ enum UnixFileType
   BlockDevice,
   Socket,
   Fifo,
+  WeirdFile
 }
 [Flags]
 enum UnixFileTypeFilter
@@ -505,6 +506,7 @@ enum UnixFileTypeFilter
   BlockDevice,
   Socket,
   Fifo,
+  WeirdFile
 }
 [Flags]
 enum UnixFilePermissions // values match System.IO.UnixFileMode.

src/Tmds.Ssh/SftpChannel.Reader.cs

@@ -150,7 +150,7 @@ public PacketType ReadPacketType()
                 UnixFileTypeByte.BlockDevice => UnixFileType.BlockDevice,
                 UnixFileTypeByte.Socket => UnixFileType.Socket,
                 UnixFileTypeByte.Fifo => UnixFileType.Fifo,
-                _ => throw new InvalidDataException($"Invalid mode: {mode}.")
+                _ => UnixFileType.WeirdFile
             };
             return (permissions, fileType);
         }

src/Tmds.Ssh/UnixFileType.cs

@@ -12,6 +12,7 @@ public enum UnixFileType : short
     BlockDevice = UnixFileTypeFilter.BlockDevice << UnixFileTypeFilterExtensions.TypeShift | UnixFileTypeByte.BlockDevice,
     Socket = UnixFileTypeFilter.Socket << UnixFileTypeFilterExtensions.TypeShift | UnixFileTypeByte.Socket,
     Fifo = UnixFileTypeFilter.Fifo << UnixFileTypeFilterExtensions.TypeShift | UnixFileTypeByte.Fifo,
+    WeirdFile = unchecked((short)(UnixFileTypeFilter.WeirdFile << UnixFileTypeFilterExtensions.TypeShift))
 }
 
 static class UnixFileTypeExtensions

src/Tmds.Ssh/UnixFileTypeFilter.cs

@@ -13,6 +13,7 @@ public enum UnixFileTypeFilter : byte
     BlockDevice = 16,
     Socket = 32,
     Fifo = 64,
+    WeirdFile = 128
 }
 
 static class UnixFileTypeFilterExtensions

test/Tmds.Ssh.Tests/PublicApiTest.PublicApi.DotNet.verified.txt

@@ -570,6 +570,7 @@ namespace Tmds.Ssh
         BlockDevice = 4102,
         Socket = 8204,
         Fifo = 16385,
+        WeirdFile = -32768,
     }
     [System.Flags]
     public enum UnixFileTypeFilter : byte
@@ -581,6 +582,7 @@ namespace Tmds.Ssh
         BlockDevice = 16,
         Socket = 32,
         Fifo = 64,
+        WeirdFile = 128,
     }
     public sealed class UploadEntriesOptions
     {