static SwfTagBase Create(SwfTagData tag_data)
{
var reader = new SwfStreamReader(tag_data.TagData);
switch (tag_data.TagId)
{
// Display list
case (int)SwfTagType.PlaceObject: return(PlaceObjectTag.Create(reader));
case (int)SwfTagType.PlaceObject2: return(PlaceObject2Tag.Create(reader));
case (int)SwfTagType.PlaceObject3: return(PlaceObject3Tag.Create(reader));
case (int)SwfTagType.RemoveObject: return(RemoveObjectTag.Create(reader));
case (int)SwfTagType.RemoveObject2: return(RemoveObject2Tag.Create(reader));
case (int)SwfTagType.ShowFrame: return(ShowFrameTag.Create(reader));
// Control
case (int)SwfTagType.SetBackgroundColor: return(SetBackgroundColorTag.Create(reader));
case (int)SwfTagType.FrameLabel: return(FrameLabelTag.Create(reader));
case (int)SwfTagType.Protect: return(ProtectTag.Create(reader));
case (int)SwfTagType.End: return(EndTag.Create(reader));
case (int)SwfTagType.ExportAssets: return(ExportAssetsTag.Create(reader));
case (int)SwfTagType.ImportAssets: return(UnsupportedTag.Create(SwfTagType.ImportAssets));
case (int)SwfTagType.EnableDebugger: return(EnableDebuggerTag.Create(reader));
case (int)SwfTagType.EnableDebugger2: return(EnableDebugger2Tag.Create(reader));
case (int)SwfTagType.ScriptLimits: return(ScriptLimitsTag.Create(reader));
case (int)SwfTagType.SetTabIndex: return(UnsupportedTag.Create(SwfTagType.SetTabIndex));
case (int)SwfTagType.ImportAssets2: return(UnsupportedTag.Create(SwfTagType.ImportAssets2));
case (int)SwfTagType.SymbolClass: return(SymbolClassTag.Create(reader));
case (int)SwfTagType.Metadata: return(MetadataTag.Create(reader));
case (int)SwfTagType.DefineScalingGrid: return(UnsupportedTag.Create(SwfTagType.DefineScalingGrid));
case (int)SwfTagType.DefineSceneAndFrameLabelData: return(DefineSceneAndFrameLabelDataTag.Create(reader));
// Actions
case (int)SwfTagType.DoAction: return(UnsupportedTag.Create(SwfTagType.DoAction));
case (int)SwfTagType.DoInitAction: return(UnsupportedTag.Create(SwfTagType.DoInitAction));
case (int)SwfTagType.DoABC: return(DoABCTag.Create(reader));
// Shape
case (int)SwfTagType.DefineShape: return(DefineShapeTag.Create(reader));
case (int)SwfTagType.DefineShape2: return(DefineShape2Tag.Create(reader));
case (int)SwfTagType.DefineShape3: return(DefineShape3Tag.Create(reader));
case (int)SwfTagType.DefineShape4: return(DefineShape4Tag.Create(reader));
// Bitmaps
case (int)SwfTagType.DefineBits: return(UnsupportedTag.Create(SwfTagType.DefineBits));
case (int)SwfTagType.JPEGTables: return(UnsupportedTag.Create(SwfTagType.JPEGTables));
case (int)SwfTagType.DefineBitsJPEG2: return(UnsupportedTag.Create(SwfTagType.DefineBitsJPEG2));
case (int)SwfTagType.DefineBitsJPEG3: return(UnsupportedTag.Create(SwfTagType.DefineBitsJPEG3));
case (int)SwfTagType.DefineBitsLossless: return(DefineBitsLosslessTag.Create(reader));
case (int)SwfTagType.DefineBitsLossless2: return(DefineBitsLossless2Tag.Create(reader));
case (int)SwfTagType.DefineBitsJPEG4: return(UnsupportedTag.Create(SwfTagType.DefineBitsJPEG4));
// Shape Morphing
case (int)SwfTagType.DefineMorphShape: return(UnsupportedTag.Create(SwfTagType.DefineMorphShape));
case (int)SwfTagType.DefineMorphShape2: return(UnsupportedTag.Create(SwfTagType.DefineMorphShape2));
// Fonts and Text
case (int)SwfTagType.DefineFont: return(UnsupportedTag.Create(SwfTagType.DefineFont));
case (int)SwfTagType.DefineFontInfo: return(UnsupportedTag.Create(SwfTagType.DefineFontInfo));
case (int)SwfTagType.DefineFontInfo2: return(UnsupportedTag.Create(SwfTagType.DefineFontInfo2));
case (int)SwfTagType.DefineFont2: return(UnsupportedTag.Create(SwfTagType.DefineFont2));
case (int)SwfTagType.DefineFont3: return(UnsupportedTag.Create(SwfTagType.DefineFont3));
case (int)SwfTagType.DefineFontAlignZones: return(UnsupportedTag.Create(SwfTagType.DefineFontAlignZones));
case (int)SwfTagType.DefineFontName: return(UnsupportedTag.Create(SwfTagType.DefineFontName));
case (int)SwfTagType.DefineText: return(UnsupportedTag.Create(SwfTagType.DefineText));
case (int)SwfTagType.DefineText2: return(UnsupportedTag.Create(SwfTagType.DefineText2));
case (int)SwfTagType.DefineEditText: return(UnsupportedTag.Create(SwfTagType.DefineEditText));
case (int)SwfTagType.CSMTextSettings: return(UnsupportedTag.Create(SwfTagType.CSMTextSettings));
case (int)SwfTagType.DefineFont4: return(UnsupportedTag.Create(SwfTagType.DefineFont4));
// Sounds
case (int)SwfTagType.DefineSound: return(UnsupportedTag.Create(SwfTagType.DefineSound));
case (int)SwfTagType.StartSound: return(UnsupportedTag.Create(SwfTagType.StartSound));
case (int)SwfTagType.StartSound2: return(UnsupportedTag.Create(SwfTagType.StartSound2));
case (int)SwfTagType.SoundStreamHead: return(UnsupportedTag.Create(SwfTagType.SoundStreamHead));
case (int)SwfTagType.SoundStreamHead2: return(UnsupportedTag.Create(SwfTagType.SoundStreamHead2));
case (int)SwfTagType.SoundStreamBlock: return(UnsupportedTag.Create(SwfTagType.SoundStreamBlock));
// Buttons
case (int)SwfTagType.DefineButton: return(UnsupportedTag.Create(SwfTagType.DefineButton));
case (int)SwfTagType.DefineButton2: return(UnsupportedTag.Create(SwfTagType.DefineButton2));
case (int)SwfTagType.DefineButtonCxform: return(UnsupportedTag.Create(SwfTagType.DefineButtonCxform));
case (int)SwfTagType.DefineButtonSound: return(UnsupportedTag.Create(SwfTagType.DefineButtonSound));
// Sprites and Movie Clips
case (int)SwfTagType.DefineSprite: return(DefineSpriteTag.Create(reader));
// Video
case (int)SwfTagType.DefineVideoStream: return(UnsupportedTag.Create(SwfTagType.DefineVideoStream));
case (int)SwfTagType.VideoFrame: return(UnsupportedTag.Create(SwfTagType.VideoFrame));
// Metadata
case (int)SwfTagType.FileAttributes: return(FileAttributesTag.Create(reader));
case (int)SwfTagType.EnableTelemetry: return(EnableTelemetryTag.Create(reader));
case (int)SwfTagType.DefineBinaryData: return(DefineBinaryDataTag.Create(reader));
default: return(UnknownTag.Create(tag_data.TagId));
}
}
/// <summary>
/// Attempts to parse raw data into a structured packet
/// </summary>
/// <param name="buffer">Raw data to parse</param>
/// <param name="packet">Parsed packet</param>
/// <param name="count">The length of the packet in bytes</param>
/// <param name="index">The index into the buffer at which the packet begins</param>
/// <returns>True if parsing was successful, false if it is not.</returns>
internal static bool TryParse(byte[] buffer, int index, int count, out Beacon802_11 packet)
{
try
{
if (count < MinimumParseableBytes)
{
packet = null;
return(false);
}
using (var ms = new MemoryStream(buffer, index, count, false))
{
using (var br = new BinaryReader(ms))
{
packet = new Beacon802_11();
packet.Timestamp = br.ReadUInt64();
packet.BeaconInterval = br.ReadBytes(2);
packet.Capabilities = br.ReadUInt16();
while (br.BaseStream.Position <= count - 2)
{
IManagementTag newTag = null;
var tagType = br.ReadByte();
var tagLength = br.ReadByte();
var safeLength = Math.Min(tagLength, count - (int)br.BaseStream.Position);
switch (tagType)
{
case (byte)ManagementTagTypes.SSID:
{
SSIDTag tag;
if (SSIDTag.TryParse(
buffer,
index + (int)br.BaseStream.Position - 2,
2 + safeLength,
out tag))
{
newTag = tag;
}
}
break;
case (byte)ManagementTagTypes.VendorSpecific:
{
/* We'll ask each vendor to parse. Not the most efficient solution.
* MSTag msTag;
* if (MSTag.TryParse(
* buffer,
* index + (int)br.BaseStream.Position - 2,
* 2 + safeLength,
* out msTag))
* {
* newTag = msTag;
* }
* else
* {*/
VendorTag tag;
if (VendorTag.TryParse(
buffer,
index + (int)br.BaseStream.Position - 2,
2 + safeLength,
out tag))
{
newTag = tag;
}
/*}*/
}
break;
}
if (newTag == null)
{
UnsupportedTag tag;
UnsupportedTag.TryParse(
buffer,
index + (int)br.BaseStream.Position - 2,
2 + safeLength,
out tag);
newTag = tag;
}
br.BaseStream.Seek(safeLength, SeekOrigin.Current);
packet.Tags.Add(newTag);
}
return(true);
}
}
}
catch (Exception)
{
packet = null;
return(false);
}
}
public SwfDisplayList Visit(UnsupportedTag tag, SwfDisplayList dl)
{
TagToWarningLog(tag);
return(dl);
}
