protected void SBParseMSG(PacketStream stream, TransactionNode payloadNode, int payloadLength)
{
List <PacketSlice> slices = new List <PacketSlice>(2);
string content = stream.PeekStringUTF8(payloadLength);
TransactionNode headersNode = new TransactionNode(payloadNode, "Headers");
int pos = content.IndexOf("\r\n\r\n");
string headers = content.Substring(0, pos);
string[] lines = headers.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string line in lines)
{
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(line), slices);
string[] tokens = line.Split(new char[] { ':' }, 2);
tokens[1] = tokens[1].TrimStart(new char[] { ' ' });
headersNode.AddField(tokens[0], tokens[1], "Message header field.", slices);
// Skip CRLF
stream.ReadBytes(2);
}
// Skip extra CRLF
stream.ReadBytes(2);
int bodyLength = payloadLength - StaticUtils.GetUTF8ByteCount(headers) - 4;
if (bodyLength > 0)
{
TransactionNode bodyNode = new TransactionNode(payloadNode, "Body");
string contentType = (string)headersNode.Fields["Content-Type"];
contentType = contentType.Split(new char[] { ';' }, 2)[0];
if (contentType == "application/x-msnmsgrp2p")
{
ReadNextP2PMessageChunk(stream, bodyNode);
UInt32 appID = stream.ReadU32BE(slices);
bodyNode.AddField("AppID", appID, "Application ID.", slices);
}
else if (contentType == "text/x-msmsgsinvite")
{
string bodyStr = stream.ReadStringUTF8(bodyLength, slices);
bodyNode.AddTextField("Body", bodyStr, "Invite body.", slices);
}
else
{
string bodyStr = stream.ReadStringUTF8(bodyLength, slices);
bodyNode.AddField("Body", bodyStr, "Body.", slices);
}
}
}
protected void AddBodyNode(PacketStream stream,
TransactionNode transactionNode,
string contentType,
string contentEncoding,
int bodyLen)
{
List <PacketSlice> slices = new List <PacketSlice>(1);
TransactionNode bodyNode = new TransactionNode("Body");
byte[] body = stream.ReadBytes(bodyLen, slices);
if (contentType == "text/html" || contentType == "text/xml")
{
int realBodyLen = body.Length;
if (body[realBodyLen - 1] == '\0')
{
realBodyLen--;
}
Decoder dec;
if (contentEncoding == "utf-8")
{
dec = Encoding.UTF8.GetDecoder();
}
else
{
dec = Encoding.ASCII.GetDecoder();
}
char[] bodyChars = new char[dec.GetCharCount(body, 0, realBodyLen)];
dec.GetChars(body, 0, realBodyLen, bodyChars, 0);
string bodyStr = new string(bodyChars);
if (contentType == "text/xml")
{
bodyNode.AddXMLField("XML", bodyStr, "Body XML data.", slices);
}
else
{
bodyNode.AddTextField("HTML", bodyStr, "Body HTML data.", slices);
}
}
else if (contentType == "application/vnd.ms-sync.wbxml")
{
string xml = WBXML.ConvertToXML(body);
bodyNode.AddXMLField("WBXML", xml, "Body WBXML data.", slices);
}
else
{
bodyNode.AddField("Raw", body, StaticUtils.FormatByteArray(body),
"Raw body data.", slices);
}
transactionNode.AddChild(bodyNode);
}
private bool HandleSwitchboardSession(IPSession session)
{
List<PacketSlice> slices = new List<PacketSlice>(1);
logger.AddMessage(String.Format("\r\n\r\nparsing session with remote endpoint: {0}\r\n", session.RemoteEndpoint));
while (true)
{
PacketStream stream = session.GetNextStreamDirection();
if (stream.GetBytesAvailable() == 0)
{
stream = session.GetNextStreamDirection();
if (stream.GetBytesAvailable() == 0)
{
break;
}
}
IPPacket pkt = stream.CurPacket;
PacketDirection direction = pkt.Direction;
try
{
string line = stream.PeekLineUTF8();
// Split the line up into CMD and the rest (being arguments, if any)
string[] tokens = line.Split(new char[] { ' ' }, 2);
logger.AddMessage(String.Format("{0} parsing command '{1}' (line: {2})",
(direction == PacketDirection.PACKET_DIRECTION_INCOMING) ? "<<" : ">>",
tokens[0], line));
// Set cmd and create an array of arguments if present
string cmd = tokens[0];
string[] arguments = new string[0];
if (tokens.Length > 1)
{
arguments = tokens[1].Split(new char[] { ' ' });
}
// Create command node
TransactionNode node = new TransactionNode("MSNSBCommand");
node.Description = cmd;
// Command field
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[0]), slices);
node.AddField("Command", tokens[0], "Switchboard command.", slices);
if (arguments.Length > 0)
{
// Skip space between command and arguments
stream.ReadByte();
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[1]), slices);
// Arguments fields
node.AddField("Arguments", tokens[1], "Arguments to command.", slices);
}
// Skip CRLF
stream.ReadBytes(2);
// Is there a payload?
bool hasPayload = false;
if (arguments.Length > 0)
{
List<string> payloadCommands =
(direction == PacketDirection.PACKET_DIRECTION_OUTGOING) ? payloadCommandsFromClient : payloadCommandsFromServer;
hasPayload = payloadCommands.Contains(cmd);
}
if (hasPayload)
{
int payloadLength = -1;
try
{
payloadLength = (int)Convert.ToUInt32(arguments[arguments.Length - 1]);
}
catch (FormatException)
{
}
if (payloadLength > 0)
{
TransactionNode payloadNode = new TransactionNode(node, "Payload");
logger.AddMessage(String.Format("Parsing {0} bytes of payload", payloadLength));
PayloadFormat format = PayloadFormat.TEXT;
string cmdUpper = cmd.ToUpper();
if (payloadCommandFormats.ContainsKey(cmdUpper))
format = payloadCommandFormats[cmdUpper];
if (format == PayloadFormat.MESSAGE)
{
SBParseMSG(stream, payloadNode, payloadLength);
}
else
{
string body = stream.ReadStringUTF8(payloadLength, slices);
switch (format)
{
case PayloadFormat.SLP:
payloadNode.AddTextField("MSNSLP", body, "MSNSLP data.", slices);
break;
case PayloadFormat.XML:
payloadNode.AddXMLField("XML", body, "XML data.", slices);
break;
default:
payloadNode.AddTextField("Text", body, "Text.", slices);
break;
}
}
}
}
session.AddNode(node);
}
catch (EndOfStreamException e)
{
logger.AddMessage(String.Format("MSNSwitchboard: EOS at {0} ({1})", stream.Position, e));
break;
}
}
logger.AddMessage("done with session\r\n\r\n");
return true;
}
protected void SBParseMSG(PacketStream stream, TransactionNode payloadNode, int payloadLength)
{
List<PacketSlice> slices = new List<PacketSlice>(2);
string content = stream.PeekStringUTF8(payloadLength);
TransactionNode headersNode = new TransactionNode(payloadNode, "Headers");
int pos = content.IndexOf("\r\n\r\n");
string headers = content.Substring(0, pos);
string[] lines = headers.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string line in lines)
{
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(line), slices);
string[] tokens = line.Split(new char[] { ':' }, 2);
tokens[1] = tokens[1].TrimStart(new char[] { ' ' });
headersNode.AddField(tokens[0], tokens[1], "Message header field.", slices);
// Skip CRLF
stream.ReadBytes(2);
}
// Skip extra CRLF
stream.ReadBytes(2);
int bodyLength = payloadLength - StaticUtils.GetUTF8ByteCount(headers) - 4;
if (bodyLength > 0)
{
TransactionNode bodyNode = new TransactionNode(payloadNode, "Body");
string contentType = (string)headersNode.Fields["Content-Type"];
contentType = contentType.Split(new char[] { ';' }, 2)[0];
if (contentType == "application/x-msnmsgrp2p")
{
ReadNextP2PMessageChunk(stream, bodyNode);
UInt32 appID = stream.ReadU32BE(slices);
bodyNode.AddField("AppID", appID, "Application ID.", slices);
}
else if (contentType == "text/x-msmsgsinvite")
{
string bodyStr = stream.ReadStringUTF8(bodyLength, slices);
bodyNode.AddTextField("Body", bodyStr, "Invite body.", slices);
}
else
{
string bodyStr = stream.ReadStringUTF8(bodyLength, slices);
bodyNode.AddField("Body", bodyStr, "Body.", slices);
}
}
}
protected void ReadNextP2PMessageChunk(PacketStream stream, TransactionNode parentNode)
{
TransactionNode p2pNode = new TransactionNode(parentNode, "MSNP2PMessageChunk");
// Headers
TransactionNode p2pHeaders = new TransactionNode(p2pNode, "Headers");
List<PacketSlice> slices = new List<PacketSlice>();
UInt32 sessionID = stream.ReadU32LE(slices);
p2pHeaders.AddField("SessionID", sessionID, "Session ID.", slices);
UInt32 messageID = stream.ReadU32LE(slices);
p2pHeaders.AddField("MessageID", messageID, "Message ID.", slices);
UInt64 dataOffset = stream.ReadU64LE(slices);
p2pHeaders.AddField("DataOffset", dataOffset, "Data offset.", slices);
UInt64 dataSize = stream.ReadU64LE(slices);
p2pHeaders.AddField("DataSize", dataSize, "Data size.", slices);
UInt32 chunkSize = stream.ReadU32LE(slices);
p2pHeaders.AddField("ChunkSize", chunkSize, "Chunk size.", slices);
UInt32 flags = stream.ReadU32LE(slices);
p2pHeaders.AddField("Flags", flags, StaticUtils.FormatFlags(flags), "Flags.", slices);
UInt32 ackedMsgID = stream.ReadU32LE(slices);
p2pHeaders.AddField("AckedMsgID", ackedMsgID, "MessageID of the message to be acknowledged.", slices);
UInt32 prevAckedMsgID = stream.ReadU32LE(slices);
p2pHeaders.AddField("PrevAckedMsgID", prevAckedMsgID, "AckedMsgID of the last chunk to ack.", slices);
UInt64 ackedDataSize = stream.ReadU64LE(slices);
p2pHeaders.AddField("AckedDataSize", ackedDataSize, "Acknowledged data size.", slices);
// Body
TransactionNode p2pContent = null;
if (chunkSize > 0)
{
p2pContent = new TransactionNode(p2pNode, "Content");
byte[] bytes = stream.ReadBytes((int)chunkSize, slices);
if (sessionID != 0)
{
p2pContent.AddField("Raw", bytes, StaticUtils.FormatByteArray(bytes), "Raw content.", slices);
}
else
{
p2pContent.AddTextField("MSNSLP", bytes, StaticUtils.DecodeUTF8(bytes), "MSNSLP data.", slices);
}
}
}
protected void ReadNextP2PMessageChunk(PacketStream stream, TransactionNode parentNode)
{
TransactionNode p2pNode = new TransactionNode(parentNode, "MSNP2PMessageChunk");
// Headers
TransactionNode p2pHeaders = new TransactionNode(p2pNode, "Headers");
List <PacketSlice> slices = new List <PacketSlice>();
UInt32 sessionID = stream.ReadU32LE(slices);
p2pHeaders.AddField("SessionID", sessionID, "Session ID.", slices);
UInt32 messageID = stream.ReadU32LE(slices);
p2pHeaders.AddField("MessageID", messageID, "Message ID.", slices);
UInt64 dataOffset = stream.ReadU64LE(slices);
p2pHeaders.AddField("DataOffset", dataOffset, "Data offset.", slices);
UInt64 dataSize = stream.ReadU64LE(slices);
p2pHeaders.AddField("DataSize", dataSize, "Data size.", slices);
UInt32 chunkSize = stream.ReadU32LE(slices);
p2pHeaders.AddField("ChunkSize", chunkSize, "Chunk size.", slices);
UInt32 flags = stream.ReadU32LE(slices);
p2pHeaders.AddField("Flags", flags, StaticUtils.FormatFlags(flags), "Flags.", slices);
UInt32 ackedMsgID = stream.ReadU32LE(slices);
p2pHeaders.AddField("AckedMsgID", ackedMsgID, "MessageID of the message to be acknowledged.", slices);
UInt32 prevAckedMsgID = stream.ReadU32LE(slices);
p2pHeaders.AddField("PrevAckedMsgID", prevAckedMsgID, "AckedMsgID of the last chunk to ack.", slices);
UInt64 ackedDataSize = stream.ReadU64LE(slices);
p2pHeaders.AddField("AckedDataSize", ackedDataSize, "Acknowledged data size.", slices);
// Body
TransactionNode p2pContent = null;
if (chunkSize > 0)
{
p2pContent = new TransactionNode(p2pNode, "Content");
byte[] bytes = stream.ReadBytes((int)chunkSize, slices);
if (sessionID != 0)
{
p2pContent.AddField("Raw", bytes, StaticUtils.FormatByteArray(bytes), "Raw content.", slices);
}
else
{
p2pContent.AddTextField("MSNSLP", bytes, StaticUtils.DecodeUTF8(bytes), "MSNSLP data.", slices);
}
}
}
private bool HandleSwitchboardSession(IPSession session)
{
List <PacketSlice> slices = new List <PacketSlice>(1);
logger.AddMessage(String.Format("\r\n\r\nparsing session with remote endpoint: {0}\r\n", session.RemoteEndpoint));
while (true)
{
PacketStream stream = session.GetNextStreamDirection();
if (stream.GetBytesAvailable() == 0)
{
stream = session.GetNextStreamDirection();
if (stream.GetBytesAvailable() == 0)
{
break;
}
}
IPPacket pkt = stream.CurPacket;
PacketDirection direction = pkt.Direction;
try
{
string line = stream.PeekLineUTF8();
// Split the line up into CMD and the rest (being arguments, if any)
string[] tokens = line.Split(new char[] { ' ' }, 2);
logger.AddMessage(String.Format("{0} parsing command '{1}' (line: {2})",
(direction == PacketDirection.PACKET_DIRECTION_INCOMING) ? "<<" : ">>",
tokens[0], line));
// Set cmd and create an array of arguments if present
string cmd = tokens[0];
string[] arguments = new string[0];
if (tokens.Length > 1)
{
arguments = tokens[1].Split(new char[] { ' ' });
}
// Create command node
TransactionNode node = new TransactionNode("MSNSBCommand");
node.Description = cmd;
// Command field
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[0]), slices);
node.AddField("Command", tokens[0], "Switchboard command.", slices);
if (arguments.Length > 0)
{
// Skip space between command and arguments
stream.ReadByte();
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[1]), slices);
// Arguments fields
node.AddField("Arguments", tokens[1], "Arguments to command.", slices);
}
// Skip CRLF
stream.ReadBytes(2);
// Is there a payload?
bool hasPayload = false;
if (arguments.Length > 0)
{
List <string> payloadCommands =
(direction == PacketDirection.PACKET_DIRECTION_OUTGOING) ? payloadCommandsFromClient : payloadCommandsFromServer;
hasPayload = payloadCommands.Contains(cmd);
}
if (hasPayload)
{
int payloadLength = -1;
try
{
payloadLength = (int)Convert.ToUInt32(arguments[arguments.Length - 1]);
}
catch (FormatException)
{
}
if (payloadLength > 0)
{
TransactionNode payloadNode = new TransactionNode(node, "Payload");
logger.AddMessage(String.Format("Parsing {0} bytes of payload", payloadLength));
PayloadFormat format = PayloadFormat.TEXT;
string cmdUpper = cmd.ToUpper();
if (payloadCommandFormats.ContainsKey(cmdUpper))
{
format = payloadCommandFormats[cmdUpper];
}
if (format == PayloadFormat.MESSAGE)
{
SBParseMSG(stream, payloadNode, payloadLength);
}
else
{
string body = stream.ReadStringUTF8(payloadLength, slices);
switch (format)
{
case PayloadFormat.SLP:
payloadNode.AddTextField("MSNSLP", body, "MSNSLP data.", slices);
break;
case PayloadFormat.XML:
payloadNode.AddXMLField("XML", body, "XML data.", slices);
break;
default:
payloadNode.AddTextField("Text", body, "Text.", slices);
break;
}
}
}
}
session.AddNode(node);
}
catch (EndOfStreamException e)
{
logger.AddMessage(String.Format("MSNSwitchboard: EOS at {0} ({1})", stream.Position, e));
break;
}
}
logger.AddMessage("done with session\r\n\r\n");
return(true);
}
protected void AddBodyNode(PacketStream stream,
TransactionNode transactionNode,
string contentType,
string contentEncoding,
int bodyLen)
{
List<PacketSlice> slices = new List<PacketSlice>(1);
TransactionNode bodyNode = new TransactionNode("Body");
byte[] body = stream.ReadBytes(bodyLen, slices);
if (contentType == "text/html" || contentType == "text/xml")
{
int realBodyLen = body.Length;
if (body[realBodyLen - 1] == '\0')
realBodyLen--;
Decoder dec;
if (contentEncoding == "utf-8")
{
dec = Encoding.UTF8.GetDecoder();
}
else
{
dec = Encoding.ASCII.GetDecoder();
}
char[] bodyChars = new char[dec.GetCharCount(body, 0, realBodyLen)];
dec.GetChars(body, 0, realBodyLen, bodyChars, 0);
string bodyStr = new string(bodyChars);
if (contentType == "text/xml")
bodyNode.AddXMLField("XML", bodyStr, "Body XML data.", slices);
else
bodyNode.AddTextField("HTML", bodyStr, "Body HTML data.", slices);
}
else if (contentType == "application/vnd.ms-sync.wbxml")
{
string xml = WBXML.ConvertToXML(body);
bodyNode.AddXMLField("WBXML", xml, "Body WBXML data.", slices);
}
else
{
bodyNode.AddField("Raw", body, StaticUtils.FormatByteArray(body),
"Raw body data.", slices);
}
transactionNode.AddChild(bodyNode);
}