/// <summary>
/// Sends a packet via Steamworks; Returns whether or not the packed could be sent
/// </summary>
public bool SendPacket(SteamId id, byte[] data, int len = -1, P2PChannel channel = P2PChannel.RELIABLE)
{
if (len > MP_PACKET_MAX || data.Length > MP_PACKET_MAX)
{
Output.LogWarning($"{Name}: Attempted to send a packet which exceeded MP_MAX_SIZE!");
return(false);
}
if (channel < 0 || channel >= P2PChannel.NUM_CHANNELS)
{
Output.LogWarning($"{Name}: Invalid send channel specified, defaulting to Reliable");
return(SteamNetworking.SendP2PPacket(id, data, len, (int)P2PChannel.RELIABLE, P2PSend.Reliable));
}
// Cast channel to send type
P2PSend send = (P2PSend)channel;
return(SteamNetworking.SendP2PPacket(id, data, len, (int)channel, send));
}
protected override void HandleConnectionFailed(SteamId id, P2PSessionError error)
{
try
{
if (!id.IsValid)
{
throw new Exception("An invalid SteamId is reporting connection failure");
}
if (!PlayerRegistry.Contains(id))
{
throw new Exception("Received connection failure message from a peer that isn't in the player registry");
}
int conn = PlayerRegistry.GetConnId(id);
// If no connection id could be found for that SteamId
if (conn == -1)
{
throw new Exception($"Invalid connection id for SteamId {id}, can't disconnect");
}
string info = P2PErrorToString(error);
Exception ex = new Exception($"Connection failed with host {id} ({info})");
Output.LogError(ex.Message);
PlayerRegistry.Remove(id);
CloseSessionWithUser(id);
// Raise OnError event
OnError?.Invoke(conn, ex);
}
catch (Exception e)
{
Output.LogWarning($"{Name}: Exception in Server.HandleConnectionFailed ({e.Message})");
return;
}
}
protected override void HandleConnectionFailed(SteamId id, P2PSessionError error)
{
try
{
if (!id.IsValid)
{
throw new Exception("An invalid SteamId is reporting connection failure");
}
if (!HostId.IsValid)
{
throw new Exception($"Connection failed with {id}, but we didn't have a host anyway...");
}
if (id != HostId)
{
throw new Exception($"Connection failed with {id}, but they weren't our host");
}
string info = P2PErrorToString(error);
Exception ex = new Exception($"Connection failed with host {id} ({info})");
Output.LogError(ex.Message);
_host = new SteamId();
CloseSessionWithUser(id);
ResetStatus();
// Raise OnError event
OnError?.Invoke(ex);
}
catch (Exception e)
{
Output.LogWarning($"{Name}: Exception in Client.HandleConnectionFailed ({e.Message})");
return;
}
}
/// <summary>
/// Static method to process any messages in the receive queue
/// </summary>
public static bool ProcessMessages(MirrorpunchCommon a)
{
if (!a.Active)
{
return(false); // Don't process messages if inactive
}
if (!a.ReceiveQueue.HasNodes)
{
return(true); // Only return false if something goes wrong
}
DateTime timer = DateTime.Now;
try
{
// Want to avoid a potential infinite loop, so only looping through a known number of nodes
for (int i = 0; i < a.ReceiveQueue.Length; i++)
{
P2Packet?packet = a.ReceiveQueue.Dequeue();
if (packet == null)
{
continue;
}
SteamId senderId = packet.Value.SteamId;
if (packet.Value.Data == null || packet.Value.Data.Length == 0)
{
continue;
}
if (!a.IsKnown(senderId))
{
byte byteType = packet.Value.Data[0];
if (byteType < 0 || byteType >= (byte)PacketType.NUM_TYPES)
{
throw new Exception("Packet with invalid PacketType received from unexpected SteamId; check sending code?");
}
PacketType packetType = (PacketType)byteType;
switch (packetType)
{
case PacketType.CONNECT:
Output.Log($"Connection requested by {senderId}");
a.OnSessionRequest(senderId);
break;
case PacketType.CONNECTION_ACCEPTED:
Output.Log($"Connection accepted by {senderId}");
break;
default:
throw new Exception($"Unexpected packet type received from {senderId} [{byteType}]");
}
// Packet from unknown sender handled without exception, continue
continue;
}
// Received a packet from a known sender, handle received data
byte[] data = packet.Value.Data;
a.OnReceivedData(senderId, data);
}
TimeSpan checkTimer = DateTime.Now - timer;
if (checkTimer.TotalMilliseconds >= MP_PROCESS_WARNING)
{
Output.LogWarning($"{a.Name}: ProcessMessages took longer than expected ({checkTimer.TotalMilliseconds} ms)");
}
// We made it here without an exception, report success
return(true);
}
catch (Exception e)
{
Output.LogError($"{a.Name}: Exception in ProcessMessages ({e.Message})");
return(false);
}
}
/// <summary>
/// Static loop method for receiving Steam P2P packets and enqueuing them in the receive queue
/// </summary>
public static async Task ReceiveLoop(MirrorpunchCommon a)
{
if (!a.Active)
{
return; // Don't bother with receive loop if inactive
}
bool warned = false;
DateTime timeWarned = DateTime.Now;
try
{
while (a.Active)
{
for (int i = 0; i < (int)P2PChannel.NUM_CHANNELS; i++)
{
if (!a.GetNextPacket(out P2Packet? packet, (P2PChannel)i))
{
continue;
}
if (packet == null)
{
continue;
}
int packetLen = packet.Value.Data.Length;
if (packetLen >= MP_PACKET_MAX)
{
Output.LogWarning($"{a.Name}: Received a packet that is too large ({packetLen})");
continue;
}
a.EnqueuePacket((P2Packet)packet);
}
if (!warned && a.ReceiveQueue.Length > MP_QUEUE_SIZE_WARNING)
{
Output.LogWarning($"{a.Name}: ReceiveQueue is backing up ({a.ReceiveQueue.Length} packets queued)");
timeWarned = DateTime.Now;
}
if (warned)
{
TimeSpan timeSinceWarning = DateTime.Now - timeWarned;
if (timeSinceWarning.TotalSeconds > MP_QUEUE_WARNING_TIMEOUT)
{
warned = false;
}
}
await Task.Delay(TimeSpan.FromMilliseconds(TickRate));
}
// Return if behavior is no longer active
return;
}
catch (Exception e)
{
Output.LogError($"{a.Name}: Exception raised in ReceiveLoop ({e.Message})");
return; // Return on any exception
}
}
public async void ConnectToId(SteamId hostId)
{
// Refuse to attempt another connection if one is active or in progress
if (Active || Status == PeerStatus.CONNECTING)
{
Output.LogWarning($"{Name}: Attempted to connect while a previous connection is active or in progress");
return;
}
// Set timeout start time, set client active, and set client status to Connecting
DateTime timeoutStart = DateTime.Now;
// Set status appropriately
_active = true;
_status = PeerStatus.CONNECTING;
try
{
// Send a request to connect
byte[] sendData = new byte[] { (byte)PacketType.CONNECT };
SendPacket(hostId, sendData, sendData.Length);
while (Status == PeerStatus.CONNECTING)
{
// Wait for a packet to arrive
while (!IsPacketAvailable())
{
TimeSpan timeoutChk = DateTime.Now - timeoutStart;
if (timeoutChk.TotalMilliseconds >= MP_TIMEOUT)
{
throw new Exception("Timed out attempting to connect");
}
await Task.Delay(TimeSpan.FromMilliseconds(TickRate));
}
GetNextPacket(out P2Packet? packet);
if (packet == null)
{
throw new Exception("Null packet received");
}
// If the packet is not null, get data and sender SteamId
byte[] data = packet.Value.Data;
SteamId sender = packet.Value.SteamId;
if (data.Length < 1 || data == null)
{
throw new Exception("Null or zero-length data array received");
}
// Ignore packets sent by someone who isn't expected
if (sender != hostId)
{
continue;
}
if (data[0] != (byte)PacketType.CONNECTION_ACCEPTED)
{
throw new Exception($"Unexpected response ({data[0]})");
}
// Now connected to a new server, set status and refresh receive queue
_status = PeerStatus.CONNECTED;
_receiveQueue.Clear();
// Raise OnConnected event
OnConnected?.Invoke();
}
_host = hostId;
}
catch (Exception e)
{
Output.LogError($"{Name}: Error connecting to host ({e.Message})");
// If we catch an exception, reset active and status
ResetStatus();
}
}
