public static OSD GetLLSD(Packet packet)
{
OSDMap body = new OSDMap();
Type type = packet.GetType();
foreach (FieldInfo field in type.GetFields())
{
if (field.IsPublic)
{
Type blockType = field.FieldType;
if (blockType.IsArray)
{
object blockArray = field.GetValue(packet);
Array array = (Array)blockArray;
OSDArray blockList = new OSDArray(array.Length);
IEnumerator ie = array.GetEnumerator();
while (ie.MoveNext())
{
object block = ie.Current;
blockList.Add(BuildLLSDBlock(block));
}
body[field.Name] = blockList;
}
else
{
object block = field.GetValue(packet);
body[field.Name] = BuildLLSDBlock(block);
}
}
}
return body;
}
/// <summary>
/// Sends a packet directly to the simulator without queuing
/// </summary>
/// <param name="packet">Packet to be sent</param>
/// <param name="setSequence">True to set the sequence number, false to
/// leave it as is</param>
public void SendPacketUnqueued(Packet packet, bool setSequence)
{
byte[] buffer;
int bytes;
// Set sequence implies that this is not a resent packet
if (setSequence)
{
// Reset to zero if we've hit the upper sequence number limit
Interlocked.CompareExchange(ref Sequence, 0, Settings.MAX_SEQUENCE);
// Increment and fetch the current sequence number
packet.Header.Sequence = (uint)Interlocked.Increment(ref Sequence);
if (packet.Header.Reliable)
{
// Wrap this packet in a struct to track timeouts and resends
NetworkManager.OutgoingPacket outgoing = new NetworkManager.OutgoingPacket(this, packet, true);
// Keep track of when this packet was first sent out (right now)
outgoing.TickCount = Environment.TickCount;
// Add this packet to the list of ACK responses we are waiting on from the server
lock (NeedAck)
{
NeedAck[packet.Header.Sequence] = outgoing;
}
if (packet.Header.Resent)
{
// This packet has already been sent out once, strip any appended ACKs
// off it and reinsert them into the outgoing ACK queue under the
// assumption that this packet will continually be rejected from the
// server or that the appended ACKs are possibly making the delivery fail
if (packet.Header.AckList.Length > 0)
{
Logger.DebugLog(String.Format("Purging ACKs from packet #{0} ({1}) which will be resent.",
packet.Header.Sequence, packet.GetType()));
lock (PendingAcks)
{
foreach (uint sequence in packet.Header.AckList)
{
if (!PendingAcks.ContainsKey(sequence))
PendingAcks[sequence] = sequence;
}
}
packet.Header.AppendedAcks = false;
packet.Header.AckList = new uint[0];
}
// Update the sent time for this packet
SetResentTime(packet.Header.Sequence);
}
else
{
// This packet is not a resend, check if the conditions are favorable
// to ACK appending
if (packet.Type != PacketType.PacketAck &&
packet.Type != PacketType.LogoutRequest)
{
lock (PendingAcks)
{
if (PendingAcks.Count > 0 &&
PendingAcks.Count < Client.Settings.MAX_APPENDED_ACKS)
{
// Append all of the queued up outgoing ACKs to this packet
packet.Header.AckList = new uint[PendingAcks.Count];
for (int i = 0; i < PendingAcks.Count; i++)
packet.Header.AckList[i] = PendingAcks.Values[i];
PendingAcks.Clear();
packet.Header.AppendedAcks = true;
}
}
}
}
}
else if (packet.Header.AckList.Length > 0)
{
// Sanity check for ACKS appended on an unreliable packet, this is bad form
Logger.Log("Sending appended ACKs on an unreliable packet", Helpers.LogLevel.Warning);
}
}
// Serialize the packet
buffer = packet.ToBytes();
bytes = buffer.Length;
Stats.SentBytes += (ulong)bytes;
++Stats.SentPackets;
UDPPacketBuffer buf = new UDPPacketBuffer(ipEndPoint);
// Zerocode if needed
if (packet.Header.Zerocoded)
bytes = Helpers.ZeroEncode(buffer, bytes, buf.Data);
else
Buffer.BlockCopy(buffer, 0, buf.Data, 0, bytes);
buf.DataLength = bytes;
AsyncBeginSend(buf);
}
/// <summary>
/// Creates a formatted string containing the values of a Packet
/// </summary>
/// <param name="packet">The Packet</param>
/// <returns>A formatted string of values of the nested items in the Packet object</returns>
public static string PacketToString(Packet packet)
{
StringBuilder result = new StringBuilder();
result.AppendFormat("Packet Type: {0} http://lib.openmetaverse.co/wiki/{0} http://wiki.secondlife.com/wiki/{0}" + Environment.NewLine, packet.Type);
result.AppendLine("[Packet Header]");
// payload
result.AppendFormat("Sequence: {0}" + Environment.NewLine, packet.Header.Sequence);
result.AppendFormat(" Options: {0}" + Environment.NewLine, InterpretOptions(packet.Header));
result.AppendLine();
result.AppendLine("[Packet Payload]");
FieldInfo[] fields = packet.GetType().GetFields();
for (int i = 0; i < fields.Length; i++)
{
// we're not interested in any of these here
if (fields[i].Name == "Type" || fields[i].Name == "Header" || fields[i].Name == "HasVariableBlocks")
continue;
if (fields[i].FieldType.IsArray)
{
result.AppendFormat("{0,30} []" + Environment.NewLine, "-- " + fields[i].Name + " --");
RecursePacketArray(fields[i], packet, ref result);
}
else
{
result.AppendFormat("{0,30}" + Environment.NewLine, "-- " + fields[i].Name + " --");
RecursePacketField(fields[i], packet, ref result);
}
}
return result.ToString();
}
/// <summary>
/// Parse a packet into human readable formatted key/value pairs
/// </summary>
/// <param name="packet">the Packet to parse</param>
/// <returns>A string containing the packet block name, and key/value pairs of the data fields</returns>
public static string PacketToString(Packet packet)
{
StringBuilder result = new StringBuilder();
foreach(FieldInfo packetField in packet.GetType().GetFields())
{
object packetDataObject = packetField.GetValue(packet);
result.AppendFormat("-- {0} --" + System.Environment.NewLine, packetField.Name);
foreach(FieldInfo packetValueField in packetField.GetValue(packet).GetType().GetFields())
{
result.AppendFormat("{0}: {1}" + System.Environment.NewLine,
packetValueField.Name, packetValueField.GetValue(packetDataObject));
}
// handle blocks that are arrays
if (packetDataObject.GetType().IsArray)
{
foreach (object nestedArrayRecord in packetDataObject as Array)
{
foreach (FieldInfo packetArrayField in nestedArrayRecord.GetType().GetFields())
{
result.AppendFormat("{0} {1}" + System.Environment.NewLine,
packetArrayField.Name, packetArrayField.GetValue(nestedArrayRecord));
}
}
}
else
{
// handle non array data blocks
foreach (PropertyInfo packetPropertyField in packetField.GetValue(packet).GetType().GetProperties())
{
// Handle fields named "Data" specifically, this is generally binary data, we'll display it as hex values
if (packetPropertyField.PropertyType.Equals(typeof(System.Byte[]))
&& packetPropertyField.Name.Equals("Data"))
{
result.AppendFormat("{0}: {1}" + System.Environment.NewLine,
packetPropertyField.Name,
Utils.BytesToHexString((byte[])packetPropertyField.GetValue(packetDataObject, null), packetPropertyField.Name));
}
// decode bytes into strings
else if (packetPropertyField.PropertyType.Equals(typeof(System.Byte[])))
{
result.AppendFormat("{0}: {1}" + System.Environment.NewLine,
packetPropertyField.Name,
Utils.BytesToString((byte[])packetPropertyField.GetValue(packetDataObject, null)));
}
else
{
result.AppendFormat("{0}: {1}" + System.Environment.NewLine,
packetPropertyField.Name, packetPropertyField.GetValue(packetDataObject, null));
}
}
}
}
return result.ToString();
}
public void SendPacket(Packet packet, bool setSequence)
{
byte[] buffer;
int bytes;
// Keep track of when this packet was sent out
packet.TickCount = Environment.TickCount;
if (setSequence)
{
// Reset to zero if we've hit the upper sequence number limit
Interlocked.CompareExchange(ref currentSequence, 0, 0xFFFFFF);
// Increment and fetch the current sequence number
uint sequence = (uint)Interlocked.Increment(ref currentSequence);
packet.Header.Sequence = sequence;
if (packet.Header.Reliable)
{
// Add this packet to the list of ACK responses we are waiting on from the client
lock (needAcks)
needAcks[sequence] = packet;
if (packet.Header.Resent)
{
// This packet has already been sent out once, strip any appended ACKs
// off it and reinsert them into the outgoing ACK queue under the
// assumption that this packet will continually be rejected from the
// client or that the appended ACKs are possibly making the delivery fail
if (packet.Header.AckList.Length > 0)
{
Logger.DebugLog(String.Format("Purging ACKs from packet #{0} ({1}) which will be resent.",
packet.Header.Sequence, packet.GetType()));
lock (pendingAcks)
{
foreach (uint ack in packet.Header.AckList)
{
if (!pendingAcks.ContainsKey(ack))
pendingAcks[ack] = ack;
}
}
packet.Header.AppendedAcks = false;
packet.Header.AckList = new uint[0];
}
}
else
{
// This packet is not a resend, check if the conditions are favorable
// to ACK appending
if (packet.Type != PacketType.PacketAck)
{
lock (pendingAcks)
{
if (pendingAcks.Count > 0 &&
pendingAcks.Count < 10)
{
// Append all of the queued up outgoing ACKs to this packet
packet.Header.AckList = new uint[pendingAcks.Count];
for (int i = 0; i < pendingAcks.Count; i++)
packet.Header.AckList[i] = pendingAcks.Values[i];
pendingAcks.Clear();
packet.Header.AppendedAcks = true;
}
}
}
}
}
else if (packet.Header.AckList.Length > 0)
{
// Sanity check for ACKS appended on an unreliable packet, this is bad form
Logger.Log("Sending appended ACKs on an unreliable packet", Helpers.LogLevel.Warning);
}
}
// Serialize the packet
buffer = packet.ToBytes();
bytes = buffer.Length;
//Stats.SentBytes += (ulong)bytes;
//++Stats.SentPackets;
UDPPacketBuffer buf;
// Zerocode if needed
if (packet.Header.Zerocoded)
{
buf = new UDPPacketBuffer(address, true, false);
bytes = Helpers.ZeroEncode(buffer, bytes, buf.Data);
buf.DataLength = bytes;
}
else
{
buf = new UDPPacketBuffer(address, false, false);
buf.Data = buffer;
buf.DataLength = bytes;
}
udpServer.AsyncBeginSend(buf);
}
