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);
}
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;
}
void
enet_peer_dispatch_incoming_reliable_commands (ENetPeer * peer, ENetChannel * channel)
{
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;
}
enet_peer_dispatch_incoming_unreliable_commands (peer, channel);
}
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;
}
}
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;
}
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);
}
static void
enet_protocol_handle_send_fragment (ENetHost * host, ENetPeer * peer, const ENetProtocol * command)
{
enet_uint32 fragmentNumber,
fragmentCount,
fragmentOffset,
fragmentLength,
startSequenceNumber,
totalLength;
ENetChannel * channel;
ENetListIterator currentCommand;
ENetIncomingCommand * startCommand;
if (command -> header.commandLength <= sizeof (ENetProtocolSendFragment) ||
command -> header.channelID >= peer -> channelCount ||
peer -> state != ENET_PEER_STATE_CONNECTED)
return;
startSequenceNumber = ENET_NET_TO_HOST_32 (command -> sendFragment.startSequenceNumber);
fragmentNumber = ENET_NET_TO_HOST_32 (command -> sendFragment.fragmentNumber);
fragmentCount = ENET_NET_TO_HOST_32 (command -> sendFragment.fragmentCount);
fragmentOffset = ENET_NET_TO_HOST_32 (command -> sendFragment.fragmentOffset);
totalLength = ENET_NET_TO_HOST_32 (command -> sendFragment.totalLength);
fragmentLength = command -> header.commandLength - sizeof (ENetProtocolSendFragment);
if (fragmentOffset >= totalLength ||
fragmentOffset + fragmentLength > totalLength ||
fragmentNumber >= fragmentCount)
return;
channel = & peer -> channels [command -> header.channelID];
if (startSequenceNumber <= channel -> incomingReliableSequenceNumber)
return;
for (currentCommand = enet_list_previous (enet_list_end (& channel -> incomingReliableCommands));
currentCommand != enet_list_end (& channel -> incomingReliableCommands);
currentCommand = enet_list_previous (currentCommand))
{
startCommand = (ENetIncomingCommand *) currentCommand;
if (startCommand -> command.header.command == ENET_PROTOCOL_COMMAND_SEND_FRAGMENT &&
startCommand -> command.sendFragment.startSequenceNumber == startSequenceNumber)
break;
}
if (currentCommand == enet_list_end (& channel -> incomingReliableCommands))
{
ENetProtocol hostCommand = * command;
hostCommand.sendFragment.startSequenceNumber = startSequenceNumber;
hostCommand.sendFragment.fragmentNumber = fragmentNumber;
hostCommand.sendFragment.fragmentCount = fragmentCount;
hostCommand.sendFragment.fragmentOffset = fragmentOffset;
hostCommand.sendFragment.totalLength = totalLength;
startCommand = enet_peer_queue_incoming_command (peer,
& hostCommand,
enet_packet_create (NULL, totalLength, ENET_PACKET_FLAG_RELIABLE),
fragmentCount);
}
else
if (totalLength != startCommand -> packet -> dataLength ||
fragmentCount != startCommand -> fragmentCount)
return;
if ((startCommand -> fragments [fragmentNumber / 32] & (1 << fragmentNumber)) == 0)
-- startCommand -> fragmentsRemaining;
startCommand -> fragments [fragmentNumber / 32] |= (1 << fragmentNumber);
if (fragmentOffset + fragmentLength > startCommand -> packet -> dataLength)
fragmentLength = startCommand -> packet -> dataLength - fragmentOffset;
memcpy (startCommand -> packet -> data + fragmentOffset,
(enet_uint8 *) command + sizeof (ENetProtocolSendFragment),
fragmentLength);
}