Beispiel #1
0
ENetOutgoingCommand *
enet_peer_queue_outgoing_command (ENetPeer * peer, const ENetProtocol * command, ENetPacket * packet, enet_uint32 offset, enet_uint16 length)
{
    ENetChannel * channel = & peer -> channels [command -> header.channelID];
    ENetOutgoingCommand * outgoingCommand;

    peer -> outgoingDataTotal += command -> header.commandLength + length;

    outgoingCommand = (ENetOutgoingCommand *) enet_malloc (sizeof (ENetOutgoingCommand));

    if (command -> header.channelID == 0xFF)
    {
       ++ peer -> outgoingReliableSequenceNumber;

       outgoingCommand -> reliableSequenceNumber = peer -> outgoingReliableSequenceNumber;
       outgoingCommand -> unreliableSequenceNumber = 0;
    }
    else
    if (command -> header.flags & ENET_PROTOCOL_FLAG_ACKNOWLEDGE)
    {
       ++ channel -> outgoingReliableSequenceNumber;

       outgoingCommand -> reliableSequenceNumber = channel -> outgoingReliableSequenceNumber;
       outgoingCommand -> unreliableSequenceNumber = 0;
    }
    else
    if (command -> header.flags & ENET_PROTOCOL_FLAG_UNSEQUENCED)
    {
       ++ peer -> outgoingUnsequencedGroup;

       outgoingCommand -> reliableSequenceNumber = 0;
       outgoingCommand -> unreliableSequenceNumber = 0;
    }
    else
    {
       ++ channel -> outgoingUnreliableSequenceNumber;

       outgoingCommand -> reliableSequenceNumber = channel -> outgoingReliableSequenceNumber;
       outgoingCommand -> unreliableSequenceNumber = channel -> outgoingUnreliableSequenceNumber;
    }

    outgoingCommand -> sentTime = 0;
    outgoingCommand -> roundTripTimeout = 0;
    outgoingCommand -> roundTripTimeoutLimit = 0;
    outgoingCommand -> fragmentOffset = offset;
    outgoingCommand -> fragmentLength = length;
    outgoingCommand -> packet = packet;
    outgoingCommand -> command = * command;
    outgoingCommand -> command.header.reliableSequenceNumber = ENET_HOST_TO_NET_32 (outgoingCommand -> reliableSequenceNumber);

    if (packet != NULL)
      ++ packet -> referenceCount;

    if (command -> header.flags & ENET_PROTOCOL_FLAG_ACKNOWLEDGE)
      enet_list_insert (enet_list_end (& peer -> outgoingReliableCommands), outgoingCommand);
    else
      enet_list_insert (enet_list_end (& peer -> outgoingUnreliableCommands), outgoingCommand);

    return outgoingCommand;
}
Beispiel #2
0
void
enet_peer_dispatch_incoming_unreliable_commands (ENetPeer * peer, ENetChannel * channel)
{
    ENetListIterator droppedCommand, startCommand, currentCommand;

    for (droppedCommand = startCommand = currentCommand = enet_list_begin (& channel -> incomingUnreliableCommands);
         currentCommand != enet_list_end (& channel -> incomingUnreliableCommands);
         currentCommand = enet_list_next (currentCommand))
    {
       ENetIncomingCommand * incomingCommand = (ENetIncomingCommand *) currentCommand;

       if ((incomingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
         continue;
       else
       if (incomingCommand -> reliableSequenceNumber != channel -> incomingReliableSequenceNumber)
         break;
       else
       if (incomingCommand -> fragmentsRemaining <= 0)
         channel -> incomingUnreliableSequenceNumber = incomingCommand -> unreliableSequenceNumber;
       else
       if (startCommand == currentCommand)
         startCommand = enet_list_next (currentCommand);
       else
       {
            enet_list_move (enet_list_end (& peer -> dispatchedCommands), startCommand, enet_list_previous (currentCommand));

            if (! peer -> needsDispatch)
            {
                enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

                peer -> needsDispatch = 1;
            }

            droppedCommand = startCommand = enet_list_next (currentCommand); 
       }
    }

    if (startCommand != currentCommand)
    {
        enet_list_move (enet_list_end (& peer -> dispatchedCommands), startCommand, enet_list_previous (currentCommand));

        if (! peer -> needsDispatch)
        {
            enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

            peer -> needsDispatch = 1;
        }

        droppedCommand = startCommand = enet_list_next (currentCommand);
    }

    enet_peer_remove_incoming_commands (& channel -> incomingUnreliableCommands, enet_list_begin (& channel -> incomingUnreliableCommands), droppedCommand);
}
Beispiel #3
0
void
enet_peer_setup_outgoing_command (ENetPeer * peer, ENetOutgoingCommand * outgoingCommand)
{
    ENetChannel * channel = & peer -> channels [outgoingCommand -> command.header.channelID];

    peer -> outgoingDataTotal += enet_protocol_command_size (outgoingCommand -> command.header.command) + outgoingCommand -> fragmentLength;

    if (outgoingCommand -> command.header.channelID == 0xFF)
    {
       ++ peer -> outgoingReliableSequenceNumber;

       outgoingCommand -> reliableSequenceNumber = peer -> outgoingReliableSequenceNumber;
       outgoingCommand -> unreliableSequenceNumber = 0;
    }
    else
    if (outgoingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE)
    {
       ++ channel -> outgoingReliableSequenceNumber;
       channel -> outgoingUnreliableSequenceNumber = 0;

       outgoingCommand -> reliableSequenceNumber = channel -> outgoingReliableSequenceNumber;
       outgoingCommand -> unreliableSequenceNumber = 0;
    }
    else
    if (outgoingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED)
    {
       ++ peer -> outgoingUnsequencedGroup;

       outgoingCommand -> reliableSequenceNumber = 0;
       outgoingCommand -> unreliableSequenceNumber = 0;
    }
    else
    {
       ++ channel -> outgoingUnreliableSequenceNumber;
        
       outgoingCommand -> reliableSequenceNumber = channel -> outgoingReliableSequenceNumber;
       outgoingCommand -> unreliableSequenceNumber = channel -> outgoingUnreliableSequenceNumber;
    }
   
    outgoingCommand -> sendAttempts = 0;
    outgoingCommand -> sentTime = 0;
    outgoingCommand -> roundTripTimeout = 0;
    outgoingCommand -> roundTripTimeoutLimit = 0;
    outgoingCommand -> command.header.reliableSequenceNumber = ENET_HOST_TO_NET_16 (outgoingCommand -> reliableSequenceNumber);

    if (outgoingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE)
      enet_list_insert (enet_list_end (& peer -> outgoingReliableCommands), outgoingCommand);
    else
      enet_list_insert (enet_list_end (& peer -> outgoingUnreliableCommands), outgoingCommand);
}
Beispiel #4
0
void
enet_peer_dispatch_incoming_unreliable_commands (ENetPeer * peer, ENetChannel * channel)
{
    ENetListIterator currentCommand;

    for (currentCommand = enet_list_begin (& channel -> incomingUnreliableCommands);
         currentCommand != enet_list_end (& channel -> incomingUnreliableCommands);
         currentCommand = enet_list_next (currentCommand))
    {
       ENetIncomingCommand * incomingCommand = (ENetIncomingCommand *) currentCommand;

       if ((incomingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE)
       {
          if (incomingCommand -> reliableSequenceNumber != channel -> incomingReliableSequenceNumber)
            break;

          channel -> incomingUnreliableSequenceNumber = incomingCommand -> unreliableSequenceNumber;
       }
    }

    if (currentCommand == enet_list_begin (& channel -> incomingUnreliableCommands))
      return;

    enet_list_move (enet_list_end (& peer -> dispatchedCommands), enet_list_begin (& channel -> incomingUnreliableCommands), enet_list_previous (currentCommand));

    if (! peer -> needsDispatch)
    {
       enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

       peer -> needsDispatch = 1;
    }
}
Beispiel #5
0
ENetAcknowledgement *
enet_peer_queue_acknowledgement (ENetPeer * peer, const ENetProtocol * command, enet_uint16 sentTime)
{
    ENetAcknowledgement * acknowledgement;

    if (command -> header.channelID < peer -> channelCount)
    {
        ENetChannel * channel = & peer -> channels [command -> header.channelID];
        enet_uint16 reliableWindow = command -> header.reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE,
                    currentWindow = channel -> incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;

        if (command -> header.reliableSequenceNumber < channel -> incomingReliableSequenceNumber)
           reliableWindow += ENET_PEER_RELIABLE_WINDOWS;

        if (reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1 && reliableWindow <= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS)
          return NULL;
    }

    acknowledgement = (ENetAcknowledgement *) enet_malloc (sizeof (ENetAcknowledgement));
    if (acknowledgement == NULL)
      return NULL;

    peer -> outgoingDataTotal += sizeof (ENetProtocolAcknowledge);

    acknowledgement -> sentTime = sentTime;
    acknowledgement -> command = * command;
    
    enet_list_insert (enet_list_end (& peer -> acknowledgements), acknowledgement);
    
    return acknowledgement;
}
Beispiel #6
0
static int
enet_protocol_check_timeouts (ENetHost * host, ENetPeer * peer, ENetEvent * event)
{
    ENetOutgoingCommand * outgoingCommand;
    ENetListIterator currentCommand;

    currentCommand = enet_list_begin (& peer -> sentReliableCommands);

    while (currentCommand != enet_list_end (& peer -> sentReliableCommands))
    {
       outgoingCommand = (ENetOutgoingCommand *) currentCommand;

       currentCommand = enet_list_next (currentCommand);

       if (ENET_TIME_DIFFERENCE (timeCurrent, outgoingCommand -> sentTime) < outgoingCommand -> roundTripTimeout)
         continue;

       if (outgoingCommand -> roundTripTimeout >= outgoingCommand -> roundTripTimeoutLimit)
       {
          event -> type = ENET_EVENT_TYPE_DISCONNECT;
          event -> peer = peer;

          enet_peer_reset (peer);

          return 1;
       }

       if (outgoingCommand -> packet != NULL)
         peer -> reliableDataInTransit -= outgoingCommand -> fragmentLength;

       ++ peer -> packetsLost;

       outgoingCommand -> roundTripTimeout *= 2;

       enet_list_insert (enet_list_begin (& peer -> outgoingReliableCommands),
                         enet_list_remove (& outgoingCommand -> outgoingCommandList));

       if (currentCommand == enet_list_begin (& peer -> sentReliableCommands) &&
           enet_list_empty (& peer -> sentReliableCommands) == 0)
       {
          outgoingCommand = (ENetOutgoingCommand *) currentCommand;

          peer -> nextTimeout = outgoingCommand -> sentTime + outgoingCommand -> roundTripTimeout;
       }
    }

    return 0;
}
Beispiel #7
0
ENetAcknowledgement *
enet_peer_queue_acknowledgement (ENetPeer * peer, const ENetProtocol * command, enet_uint32 sentTime)
{
    ENetAcknowledgement * acknowledgement;

    peer -> outgoingDataTotal += sizeof (ENetProtocolAcknowledge);

    acknowledgement = (ENetAcknowledgement *) enet_malloc (sizeof (ENetAcknowledgement));

    acknowledgement -> sentTime = sentTime;
    acknowledgement -> command = * command;

    enet_list_insert (enet_list_end (& peer -> acknowledgements), acknowledgement);

    return acknowledgement;
}
Beispiel #8
0
void
enet_peer_dispatch_incoming_reliable_commands (ENetPeer * peer, ENetChannel * channel)
{
    enet_uint16 oldReliableSequenceNumber = channel -> incomingReliableSequenceNumber;
    ENetListIterator currentCommand;

    for (currentCommand = enet_list_begin (& channel -> incomingReliableCommands);
         currentCommand != enet_list_end (& channel -> incomingReliableCommands);
         currentCommand = enet_list_next (currentCommand))
    {
       ENetIncomingCommand * incomingCommand = (ENetIncomingCommand *) currentCommand;
         
       if (incomingCommand -> fragmentsRemaining > 0 ||
           incomingCommand -> reliableSequenceNumber != (enet_uint16) (channel -> incomingReliableSequenceNumber + 1))
         break;

       channel -> incomingReliableSequenceNumber = incomingCommand -> reliableSequenceNumber;

       if (incomingCommand -> fragmentCount > 0)
         channel -> incomingReliableSequenceNumber += incomingCommand -> fragmentCount - 1;
    } 

    if (currentCommand == enet_list_begin (& channel -> incomingReliableCommands))
      return;

    channel -> incomingUnreliableSequenceNumber = 0;

    enet_list_move (enet_list_end (& peer -> dispatchedCommands), enet_list_begin (& channel -> incomingReliableCommands), enet_list_previous (currentCommand));

    if (! peer -> needsDispatch)
    {
       enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

       peer -> needsDispatch = 1;
    }

    if (! enet_list_empty (& channel -> incomingUnreliableCommands))
       enet_peer_dispatch_incoming_unreliable_commands (peer, channel);
}
Beispiel #9
0
/** Queues a packet to be sent.
    @param peer destination for the packet
    @param channelID channel on which to send
    @param packet packet to send
    @retval 0 on success
    @retval < 0 on failure
*/
int
enet_peer_send (ENetPeer * peer, enet_uint8 channelID, ENetPacket * packet)
{
   ENetChannel * channel = & peer -> channels [channelID];
   ENetProtocol command;
   size_t fragmentLength;

   if (peer -> state != ENET_PEER_STATE_CONNECTED ||
       channelID >= peer -> channelCount)
     return -1;

   fragmentLength = peer -> mtu - sizeof (ENetProtocolHeader) - sizeof (ENetProtocolSendFragment);

   if (packet -> dataLength > fragmentLength)
   {
      enet_uint16 startSequenceNumber = ENET_HOST_TO_NET_16 (channel -> outgoingReliableSequenceNumber + 1);
      enet_uint32 fragmentCount = ENET_HOST_TO_NET_32 ((packet -> dataLength + fragmentLength - 1) / fragmentLength),
             fragmentNumber,
             fragmentOffset;
      ENetList fragments;
      ENetOutgoingCommand * fragment;

      enet_list_clear (& fragments);

      for (fragmentNumber = 0,
             fragmentOffset = 0;
           fragmentOffset < packet -> dataLength;
           ++ fragmentNumber,
             fragmentOffset += fragmentLength)
      {
         if (packet -> dataLength - fragmentOffset < fragmentLength)
           fragmentLength = packet -> dataLength - fragmentOffset;

         fragment = (ENetOutgoingCommand *) enet_malloc (sizeof (ENetOutgoingCommand));
         if (fragment == NULL)
         {
            while (! enet_list_empty (& fragments))
            {
               fragment = (ENetOutgoingCommand *) enet_list_remove (enet_list_begin (& fragments));
               
               enet_free (fragment);
            }
            
            return -1;
         }
         
         fragment -> fragmentOffset = fragmentOffset;
         fragment -> fragmentLength = fragmentLength;
         fragment -> packet = packet;
         fragment -> command.header.command = ENET_PROTOCOL_COMMAND_SEND_FRAGMENT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
         fragment -> command.header.channelID = channelID;
         fragment -> command.sendFragment.startSequenceNumber = startSequenceNumber;
         fragment -> command.sendFragment.dataLength = ENET_HOST_TO_NET_16 (fragmentLength);
         fragment -> command.sendFragment.fragmentCount = fragmentCount;
         fragment -> command.sendFragment.fragmentNumber = ENET_HOST_TO_NET_32 (fragmentNumber);
         fragment -> command.sendFragment.totalLength = ENET_HOST_TO_NET_32 (packet -> dataLength);
         fragment -> command.sendFragment.fragmentOffset = ENET_NET_TO_HOST_32 (fragmentOffset);
        
         enet_list_insert (enet_list_end (& fragments), fragment);
      }

      packet -> referenceCount += fragmentNumber;

      while (! enet_list_empty (& fragments))
      {
         fragment = (ENetOutgoingCommand *) enet_list_remove (enet_list_begin (& fragments));
 
         enet_peer_setup_outgoing_command (peer, fragment);
      }

      return 0;
   }

   command.header.channelID = channelID;

   if (packet -> flags & ENET_PACKET_FLAG_RELIABLE)
   {
      command.header.command = ENET_PROTOCOL_COMMAND_SEND_RELIABLE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
      command.sendReliable.dataLength = ENET_HOST_TO_NET_16 (packet -> dataLength);
   }
   else
   if (packet -> flags & ENET_PACKET_FLAG_UNSEQUENCED)
   {
      command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
      command.sendUnsequenced.unsequencedGroup = ENET_HOST_TO_NET_16 (peer -> outgoingUnsequencedGroup + 1);
      command.sendUnsequenced.dataLength = ENET_HOST_TO_NET_16 (packet -> dataLength);
   }
   else 
   if (channel -> outgoingUnreliableSequenceNumber >= 0xFFFF)
   {
      command.header.command = ENET_PROTOCOL_COMMAND_SEND_RELIABLE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
      command.sendReliable.dataLength = ENET_HOST_TO_NET_16 (packet -> dataLength);
   }
   else
   {
      command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE;
      command.sendUnreliable.unreliableSequenceNumber = ENET_HOST_TO_NET_16 (channel -> outgoingUnreliableSequenceNumber + 1);
      command.sendUnreliable.dataLength = ENET_HOST_TO_NET_16 (packet -> dataLength);
   }

   if (enet_peer_queue_outgoing_command (peer, & command, packet, 0, packet -> dataLength) == NULL)
     return -1;

   return 0;
}
Beispiel #10
0
ENetIncomingCommand *
enet_peer_queue_incoming_command (ENetPeer * peer, const ENetProtocol * command, ENetPacket * packet, enet_uint32 fragmentCount)
{
    static ENetIncomingCommand dummyCommand;

    ENetChannel * channel = & peer -> channels [command -> header.channelID];
    enet_uint32 unreliableSequenceNumber = 0, reliableSequenceNumber;
    enet_uint16 reliableWindow, currentWindow;
    ENetIncomingCommand * incomingCommand;
    ENetListIterator currentCommand;

    if (peer -> state == ENET_PEER_STATE_DISCONNECT_LATER)
      goto freePacket;

    if ((command -> header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
    {
        reliableSequenceNumber = command -> header.reliableSequenceNumber;
        reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
        currentWindow = channel -> incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;

        if (reliableSequenceNumber < channel -> incomingReliableSequenceNumber)
           reliableWindow += ENET_PEER_RELIABLE_WINDOWS;

        if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
          goto freePacket;
    }
                    
    switch (command -> header.command & ENET_PROTOCOL_COMMAND_MASK)
    {
    case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
    case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
       if (reliableSequenceNumber == channel -> incomingReliableSequenceNumber)
           goto freePacket;
       
       for (currentCommand = enet_list_previous (enet_list_end (& channel -> incomingReliableCommands));
            currentCommand != enet_list_end (& channel -> incomingReliableCommands);
            currentCommand = enet_list_previous (currentCommand))
       {
          incomingCommand = (ENetIncomingCommand *) currentCommand;

          if (reliableSequenceNumber >= channel -> incomingReliableSequenceNumber)
          {
             if (incomingCommand -> reliableSequenceNumber < channel -> incomingReliableSequenceNumber)
               continue;
          }
          else
          if (incomingCommand -> reliableSequenceNumber >= channel -> incomingReliableSequenceNumber)
            break;

          if (incomingCommand -> reliableSequenceNumber <= reliableSequenceNumber)
          {
             if (incomingCommand -> reliableSequenceNumber < reliableSequenceNumber)
               break;

             goto freePacket;
          }
       }
       break;

    case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
       unreliableSequenceNumber = ENET_NET_TO_HOST_16 (command -> sendUnreliable.unreliableSequenceNumber);

       if (reliableSequenceNumber == channel -> incomingReliableSequenceNumber &&
           unreliableSequenceNumber <= channel -> incomingUnreliableSequenceNumber)
           goto freePacket;

       for (currentCommand = enet_list_previous (enet_list_end (& channel -> incomingUnreliableCommands));
            currentCommand != enet_list_end (& channel -> incomingUnreliableCommands);
            currentCommand = enet_list_previous (currentCommand))
       {
          incomingCommand = (ENetIncomingCommand *) currentCommand;

          if ((incomingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE)
            continue;

          if (reliableSequenceNumber >= channel -> incomingReliableSequenceNumber)
          {
             if (incomingCommand -> reliableSequenceNumber < channel -> incomingReliableSequenceNumber)
               continue;
          }
          else
          if (incomingCommand -> reliableSequenceNumber >= channel -> incomingReliableSequenceNumber)
            break;

          if (incomingCommand -> reliableSequenceNumber < reliableSequenceNumber)
            break;

          if (incomingCommand -> reliableSequenceNumber > reliableSequenceNumber)
            continue;

          if (incomingCommand -> unreliableSequenceNumber <= unreliableSequenceNumber)
          {
             if (incomingCommand -> unreliableSequenceNumber < unreliableSequenceNumber)
               break;

             goto freePacket;
          }
       }
       break;

    case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
       currentCommand = enet_list_end (& channel -> incomingUnreliableCommands);
       break;

    default:
       goto freePacket;
    }

    incomingCommand = (ENetIncomingCommand *) enet_malloc (sizeof (ENetIncomingCommand));
    if (incomingCommand == NULL)
      goto notifyError;

    incomingCommand -> reliableSequenceNumber = command -> header.reliableSequenceNumber;
    incomingCommand -> unreliableSequenceNumber = unreliableSequenceNumber & 0xFFFF;
    incomingCommand -> command = * command;
    incomingCommand -> fragmentCount = fragmentCount;
    incomingCommand -> fragmentsRemaining = fragmentCount;
    incomingCommand -> packet = packet;
    incomingCommand -> fragments = NULL;
    
    if (fragmentCount > 0)
    { 
       incomingCommand -> fragments = (enet_uint32 *) enet_malloc ((fragmentCount + 31) / 32 * sizeof (enet_uint32));
       if (incomingCommand -> fragments == NULL)
       {
          enet_free (incomingCommand);

          goto notifyError;
       }
       memset (incomingCommand -> fragments, 0, (fragmentCount + 31) / 32 * sizeof (enet_uint32));
    }

    if (packet != NULL)
      ++ packet -> referenceCount;

    enet_list_insert (enet_list_next (currentCommand), incomingCommand);

    switch (command -> header.command & ENET_PROTOCOL_COMMAND_MASK)
    {
    case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
    case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
       enet_peer_dispatch_incoming_reliable_commands (peer, channel);
       break;

    default:
       enet_peer_dispatch_incoming_unreliable_commands (peer, channel);
       break;
    }

    return incomingCommand;

freePacket:
    if (fragmentCount > 0)
      goto notifyError;

    if (packet != NULL && packet -> referenceCount == 0)
      enet_packet_destroy (packet);

    return & dummyCommand;

notifyError:
    if (packet != NULL && packet -> referenceCount == 0)
      enet_packet_destroy (packet);

    return NULL;
}
Beispiel #11
0
ENetIncomingCommand *
enet_peer_queue_incoming_command (ENetPeer * peer, const ENetProtocol * command, ENetPacket * packet, enet_uint32 fragmentCount)
{
    ENetChannel * channel = & peer -> channels [command -> header.channelID];
    enet_uint32 unreliableSequenceNumber = 0;
    ENetIncomingCommand * incomingCommand;
    ENetListIterator currentCommand;

    switch (command -> header.command)
    {
    case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
    case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
       for (currentCommand = enet_list_previous (enet_list_end (& channel -> incomingReliableCommands));
            currentCommand != enet_list_end (& channel -> incomingReliableCommands);
            currentCommand = enet_list_previous (currentCommand))
       {
          incomingCommand = (ENetIncomingCommand *) currentCommand;

          if (incomingCommand -> reliableSequenceNumber <= command -> header.reliableSequenceNumber)
          {
             if (incomingCommand -> reliableSequenceNumber < command -> header.reliableSequenceNumber)
               break;

             goto freePacket;
          }
       }
       break;

    case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
       unreliableSequenceNumber = ENET_NET_TO_HOST_32 (command -> sendUnreliable.unreliableSequenceNumber);

       if (command -> header.reliableSequenceNumber < channel -> incomingReliableSequenceNumber)
         goto freePacket;

       if (unreliableSequenceNumber <= channel -> incomingUnreliableSequenceNumber)
         goto freePacket;

       for (currentCommand = enet_list_previous (enet_list_end (& channel -> incomingUnreliableCommands));
            currentCommand != enet_list_end (& channel -> incomingUnreliableCommands);
            currentCommand = enet_list_previous (currentCommand))
       {
          incomingCommand = (ENetIncomingCommand *) currentCommand;

          if (incomingCommand -> unreliableSequenceNumber <= unreliableSequenceNumber)
          {
             if (incomingCommand -> unreliableSequenceNumber < unreliableSequenceNumber)
               break;

             goto freePacket;
          }
       }
       break;

    case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
       currentCommand = enet_list_end (& channel -> incomingUnreliableCommands);
       break;

    default:
       goto freePacket;
    }

    incomingCommand = (ENetIncomingCommand *) enet_malloc (sizeof (ENetIncomingCommand));

    incomingCommand -> reliableSequenceNumber = command -> header.reliableSequenceNumber;
    incomingCommand -> unreliableSequenceNumber = unreliableSequenceNumber;
    incomingCommand -> command = * command;
    incomingCommand -> fragmentCount = fragmentCount;
    incomingCommand -> fragmentsRemaining = fragmentCount;
    incomingCommand -> packet = packet;
    incomingCommand -> fragments = NULL;

    if (fragmentCount > 0)
    {
       incomingCommand -> fragments = (enet_uint32 *) enet_malloc ((fragmentCount + 31) / 32 * sizeof (enet_uint32));
       memset (incomingCommand -> fragments, 0, (fragmentCount + 31) / 32 * sizeof (enet_uint32));
    }

    if (packet != NULL)
      ++ packet -> referenceCount;

    enet_list_insert (enet_list_next (currentCommand), incomingCommand);

    return incomingCommand;

freePacket:
    if (packet != NULL)
    {
       if (packet -> referenceCount == 0)
         enet_packet_destroy (packet);
    }

    return NULL;
}
Beispiel #12
0
void
enet_peer_dispatch_incoming_unreliable_commands (ENetPeer * peer, ENetChannel * channel)
{
    ENetListIterator droppedCommand, startCommand, currentCommand;

    for (droppedCommand = startCommand = currentCommand = enet_list_begin (& channel -> incomingUnreliableCommands);
         currentCommand != enet_list_end (& channel -> incomingUnreliableCommands);
         currentCommand = enet_list_next (currentCommand))
    {
       ENetIncomingCommand * incomingCommand = (ENetIncomingCommand *) currentCommand;

       if ((incomingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
         continue;

       if (incomingCommand -> reliableSequenceNumber == channel -> incomingReliableSequenceNumber)
       {
          if (incomingCommand -> fragmentsRemaining <= 0)
          {
             channel -> incomingUnreliableSequenceNumber = incomingCommand -> unreliableSequenceNumber;
             continue;
          }

          if (startCommand != currentCommand)
          {
             enet_list_move (enet_list_end (& peer -> dispatchedCommands), startCommand, enet_list_previous (currentCommand));

             if (! peer -> needsDispatch)
             {
                enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

                peer -> needsDispatch = 1;
             }

             droppedCommand = currentCommand;
          }
          else
          if (droppedCommand != currentCommand)
            droppedCommand = enet_list_previous (currentCommand);
       }
       else 
       {
          enet_uint16 reliableWindow = incomingCommand -> reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE,
                      currentWindow = channel -> incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
          if (incomingCommand -> reliableSequenceNumber < channel -> incomingReliableSequenceNumber)
            reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
          if (reliableWindow >= currentWindow && reliableWindow < currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
            break;

          droppedCommand = enet_list_next (currentCommand);

          if (startCommand != currentCommand)
          {
             enet_list_move (enet_list_end (& peer -> dispatchedCommands), startCommand, enet_list_previous (currentCommand));

             if (! peer -> needsDispatch)
             {
                enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

                peer -> needsDispatch = 1;
             }
          }
       }
          
       startCommand = enet_list_next (currentCommand);
    }

    if (startCommand != currentCommand)
    {
       enet_list_move (enet_list_end (& peer -> dispatchedCommands), startCommand, enet_list_previous (currentCommand));

       if (! peer -> needsDispatch)
       {
           enet_list_insert (enet_list_end (& peer -> host -> dispatchQueue), & peer -> dispatchList);

           peer -> needsDispatch = 1;
       }

       droppedCommand = currentCommand;
    }

    enet_peer_remove_incoming_commands (& channel -> incomingUnreliableCommands, enet_list_begin (& channel -> incomingUnreliableCommands), droppedCommand);
}
Beispiel #13
0
static void
enet_protocol_send_reliable_outgoing_commands (ENetHost * host, ENetPeer * peer)
{
    ENetProtocol * command = & host -> commands [host -> commandCount];
    ENetBuffer * buffer = & host -> buffers [host -> bufferCount];
    ENetOutgoingCommand * outgoingCommand;
    ENetListIterator currentCommand;

    currentCommand = enet_list_begin (& peer -> outgoingReliableCommands);

    while (currentCommand != enet_list_end (& peer -> outgoingReliableCommands))
    {
       outgoingCommand = (ENetOutgoingCommand *) currentCommand;

       if (command >= & host -> commands [sizeof (host -> commands) / sizeof (ENetProtocol)] ||
           buffer + 1 >= & host -> buffers [sizeof (host -> buffers) / sizeof (ENetBuffer)] ||
           peer -> mtu - host -> packetSize < outgoingCommand -> command.header.commandLength)
         break;

       currentCommand = enet_list_next (currentCommand);

       if (outgoingCommand -> packet != NULL)
       {
          if ((enet_uint16) (peer -> mtu - host -> packetSize) <
                (enet_uint16) (outgoingCommand -> command.header.commandLength +
                           outgoingCommand -> fragmentLength) ||
              peer -> reliableDataInTransit + outgoingCommand -> fragmentLength > peer -> windowSize)
            break;
       }

       if (outgoingCommand -> roundTripTimeout == 0)
       {
          outgoingCommand -> roundTripTimeout = peer -> roundTripTime + 4 * peer -> roundTripTimeVariance;
          outgoingCommand -> roundTripTimeoutLimit = ENET_PEER_TIMEOUT_LIMIT * outgoingCommand -> roundTripTimeout;
       }

       if (enet_list_empty (& peer -> sentReliableCommands))
         peer -> nextTimeout = timeCurrent + outgoingCommand -> roundTripTimeout;

       enet_list_insert (enet_list_end (& peer -> sentReliableCommands),
                         enet_list_remove (& outgoingCommand -> outgoingCommandList));

       outgoingCommand -> sentTime = timeCurrent;

       buffer -> data = command;
       buffer -> dataLength = outgoingCommand -> command.header.commandLength;

       host -> packetSize += buffer -> dataLength;

       * command = outgoingCommand -> command;

       if (outgoingCommand -> packet != NULL)
       {
          ++ buffer;

          buffer -> data = outgoingCommand -> packet -> data + outgoingCommand -> fragmentOffset;
          buffer -> dataLength = outgoingCommand -> fragmentLength;

          command -> header.commandLength += outgoingCommand -> fragmentLength;

          host -> packetSize += outgoingCommand -> fragmentLength;

          peer -> reliableDataInTransit += outgoingCommand -> fragmentLength;
       }

       command -> header.commandLength = ENET_HOST_TO_NET_32 (command -> header.commandLength);

       ++ peer -> packetsSent;

       ++ command;
       ++ buffer;
    }

    host -> commandCount = command - host -> commands;
    host -> bufferCount = buffer - host -> buffers;
}
Beispiel #14
0
static void
enet_protocol_send_unreliable_outgoing_commands (ENetHost * host, ENetPeer * peer)
{
    ENetProtocol * command = & host -> commands [host -> commandCount];
    ENetBuffer * buffer = & host -> buffers [host -> bufferCount];
    ENetOutgoingCommand * outgoingCommand;
    ENetListIterator currentCommand;

    currentCommand = enet_list_begin (& peer -> outgoingUnreliableCommands);

    while (currentCommand != enet_list_end (& peer -> outgoingUnreliableCommands))
    {
       outgoingCommand = (ENetOutgoingCommand *) currentCommand;

       if (command >= & host -> commands [sizeof (host -> commands) / sizeof (ENetProtocol)] ||
           buffer + 1 >= & host -> buffers [sizeof (host -> buffers) / sizeof (ENetBuffer)] ||
           peer -> mtu - host -> packetSize < outgoingCommand -> command.header.commandLength ||
           (outgoingCommand -> packet != NULL &&
             peer -> mtu - host -> packetSize < outgoingCommand -> command.header.commandLength +
                                                         outgoingCommand -> packet -> dataLength))
         break;

       currentCommand = enet_list_next (currentCommand);

       if (outgoingCommand -> packet != NULL)
       {
          peer -> packetThrottleCounter += ENET_PEER_PACKET_THROTTLE_COUNTER;
          peer -> packetThrottleCounter %= ENET_PEER_PACKET_THROTTLE_SCALE;

          if (peer -> packetThrottleCounter > peer -> packetThrottle)
          {
             -- outgoingCommand -> packet -> referenceCount;

             if (outgoingCommand -> packet -> referenceCount == 0)
               enet_packet_destroy (outgoingCommand -> packet);

             enet_list_remove (& outgoingCommand -> outgoingCommandList);
             enet_free (outgoingCommand);

             continue;
          }
       }

       buffer -> data = command;
       buffer -> dataLength = outgoingCommand -> command.header.commandLength;

       host -> packetSize += buffer -> dataLength;

       * command = outgoingCommand -> command;

       enet_list_remove (& outgoingCommand -> outgoingCommandList);

       if (outgoingCommand -> packet != NULL)
       {
          ++ buffer;

          buffer -> data = outgoingCommand -> packet -> data;
          buffer -> dataLength = outgoingCommand -> packet -> dataLength;

          command -> header.commandLength += buffer -> dataLength;

          host -> packetSize += buffer -> dataLength;

          enet_list_insert (enet_list_end (& peer -> sentUnreliableCommands), outgoingCommand);
       }
       else
         enet_free (outgoingCommand);

       command -> header.commandLength = ENET_HOST_TO_NET_32 (command -> header.commandLength);

       ++ command;
       ++ buffer;
    }

    host -> commandCount = command - host -> commands;
    host -> bufferCount = buffer - host -> buffers;
}