static void handle_server_audio(ENetPacket* packet) {
enet_uint32 src, len;
svc_network_packet_t np;
/* ignore audio when locally muted */
if (client.deafen) { /* FIXME: no lock, as deafen is only access from this thread (for now) */
return;
}
/* decode header */
src = ENET_NET_TO_HOST_32(*(enet_uint32*)(packet->data + 0));
len = ENET_NET_TO_HOST_32(*(enet_uint32*)(packet->data + 4));
if (src >= client.peers_size) {
fprintf(stderr, "Invalid source %i in audio packet.\n", src);
return;
}
/* make an audio packet */
np.data = packet->data + 10;
np.data_len = len - 2;
np.time = ENET_NET_TO_HOST_16(*(enet_uint16*)(packet->data + 8));
/* send audio to SVC */
svc_packet_recieve(&np, client.peers[src].peer);
}
static void
enet_protocol_handle_bandwidth_limit (ENetHost * host, ENetPeer * peer, const ENetProtocol * command)
{
if (command -> header.commandLength < sizeof (ENetProtocolBandwidthLimit))
return;
peer -> incomingBandwidth = ENET_NET_TO_HOST_32 (command -> bandwidthLimit.incomingBandwidth);
peer -> outgoingBandwidth = ENET_NET_TO_HOST_32 (command -> bandwidthLimit.outgoingBandwidth);
}
static void
enet_protocol_handle_throttle_configure (ENetHost * host, ENetPeer * peer, const ENetProtocol * command)
{
if (command -> header.commandLength < sizeof (ENetProtocolThrottleConfigure))
return;
peer -> packetThrottleInterval = ENET_NET_TO_HOST_32 (command -> throttleConfigure.packetThrottleInterval);
peer -> packetThrottleAcceleration = ENET_NET_TO_HOST_32 (command -> throttleConfigure.packetThrottleAcceleration);
peer -> packetThrottleDeceleration = ENET_NET_TO_HOST_32 (command -> throttleConfigure.packetThrottleDeceleration);
}
uint32_t MessageIn::readInt32()
{
uint32_t value = 0;
if (mPos + 4 <= mLength)
{
uint32_t t;
memcpy(&t, mData + mPos, 4);
value = ENET_NET_TO_HOST_32(t);
}
mPos += 4;
return value;
}
static void
enet_protocol_handle_verify_connect (ENetHost * host, ENetEvent * event, ENetPeer * peer, const ENetProtocol * command)
{
enet_uint16 mtu;
enet_uint32 windowSize;
if (command -> header.commandLength < sizeof (ENetProtocolVerifyConnect) ||
peer -> state != ENET_PEER_STATE_CONNECTING)
return;
if (ENET_NET_TO_HOST_32 (command -> verifyConnect.channelCount) != peer -> channelCount ||
ENET_NET_TO_HOST_32 (command -> verifyConnect.packetThrottleInterval) != peer -> packetThrottleInterval ||
ENET_NET_TO_HOST_32 (command -> verifyConnect.packetThrottleAcceleration) != peer -> packetThrottleAcceleration ||
ENET_NET_TO_HOST_32 (command -> verifyConnect.packetThrottleDeceleration) != peer -> packetThrottleDeceleration)
{
peer -> state = ENET_PEER_STATE_ZOMBIE;
return;
}
peer -> outgoingPeerID = ENET_NET_TO_HOST_16 (command -> verifyConnect.outgoingPeerID);
mtu = ENET_NET_TO_HOST_16 (command -> verifyConnect.mtu);
if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
mtu = ENET_PROTOCOL_MINIMUM_MTU;
else
if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
mtu = ENET_PROTOCOL_MAXIMUM_MTU;
if (mtu < peer -> mtu)
peer -> mtu = mtu;
windowSize = ENET_NET_TO_HOST_32 (command -> verifyConnect.windowSize);
if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
if (windowSize < peer -> windowSize)
peer -> windowSize = windowSize;
peer -> incomingBandwidth = ENET_NET_TO_HOST_32 (command -> verifyConnect.incomingBandwidth);
peer -> outgoingBandwidth = ENET_NET_TO_HOST_32 (command -> verifyConnect.outgoingBandwidth);
host -> recalculateBandwidthLimits = 1;
peer -> state = ENET_PEER_STATE_CONNECTED;
event -> type = ENET_EVENT_TYPE_CONNECT;
event -> peer = peer;
}
static void
enet_protocol_handle_bandwidth_limit (ENetHost * host, ENetPeer * peer, const ENetProtocol * command)
{
if (command -> header.commandLength < sizeof (ENetProtocolBandwidthLimit))
return;
peer -> incomingBandwidth = ENET_NET_TO_HOST_32 (command -> bandwidthLimit.incomingBandwidth);
peer -> outgoingBandwidth = ENET_NET_TO_HOST_32 (command -> bandwidthLimit.outgoingBandwidth);
if (peer -> incomingBandwidth == 0 &&
host -> outgoingBandwidth == 0)
peer -> windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else
peer -> windowSize = (ENET_MIN (peer -> incomingBandwidth, host -> outgoingBandwidth) /
ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (peer -> windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
peer -> windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else
if (peer -> windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
peer -> windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
}
int MessageIn::readInt32()
{
int value = -1;
if (mPos + 4 <= mLength)
{
uint32_t t;
memcpy(&t, mData + mPos, 4);
value = ENET_NET_TO_HOST_32(t);
}
else LOG_DEBUG("Unable to read 4 bytes in " << this->getId() << "!");
mPos += 4;
return value;
}
/** 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;
}
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;
}
/** 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_uint32 fragmentCount = ENET_HOST_TO_NET_32 ((packet -> dataLength + fragmentLength - 1) / fragmentLength),
startSequenceNumber = ENET_HOST_TO_NET_32 (channel -> outgoingReliableSequenceNumber + 1),
fragmentNumber,
fragmentOffset;
packet -> flags = ENET_PACKET_FLAG_RELIABLE;
for (fragmentNumber = 0,
fragmentOffset = 0;
fragmentOffset < packet -> dataLength;
++ fragmentNumber,
fragmentOffset += fragmentLength)
{
command.header.command = ENET_PROTOCOL_COMMAND_SEND_FRAGMENT;
command.header.channelID = channelID;
command.header.flags = ENET_PROTOCOL_FLAG_ACKNOWLEDGE;
command.header.commandLength = sizeof (ENetProtocolSendFragment);
command.sendFragment.startSequenceNumber = startSequenceNumber;
command.sendFragment.fragmentCount = fragmentCount;
command.sendFragment.fragmentNumber = ENET_HOST_TO_NET_32 (fragmentNumber);
command.sendFragment.totalLength = ENET_HOST_TO_NET_32 (packet -> dataLength);
command.sendFragment.fragmentOffset = ENET_NET_TO_HOST_32 (fragmentOffset);
if (packet -> dataLength - fragmentOffset < fragmentLength)
fragmentLength = packet -> dataLength - fragmentOffset;
enet_peer_queue_outgoing_command (peer, & command, packet, fragmentOffset, fragmentLength);
}
return 0;
}
command.header.channelID = channelID;
if (packet -> flags & ENET_PACKET_FLAG_RELIABLE)
{
command.header.command = ENET_PROTOCOL_COMMAND_SEND_RELIABLE;
command.header.flags = ENET_PROTOCOL_FLAG_ACKNOWLEDGE;
command.header.commandLength = sizeof (ENetProtocolSendReliable);
}
else
if (packet -> flags & ENET_PACKET_FLAG_UNSEQUENCED)
{
command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED;
command.header.flags = ENET_PROTOCOL_FLAG_UNSEQUENCED;
command.header.commandLength = sizeof (ENetProtocolSendUnsequenced);
command.sendUnsequenced.unsequencedGroup = ENET_HOST_TO_NET_32 (peer -> outgoingUnsequencedGroup + 1);
}
else
{
command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE;
command.header.flags = 0;
command.header.commandLength = sizeof (ENetProtocolSendUnreliable);
command.sendUnreliable.unreliableSequenceNumber = ENET_HOST_TO_NET_32 (channel -> outgoingUnreliableSequenceNumber + 1);
}
enet_peer_queue_outgoing_command (peer, & command, packet, 0, packet -> dataLength);
return 0;
}
static int
enet_protocol_handle_incoming_commands (ENetHost * host, ENetEvent * event)
{
ENetProtocolHeader * header;
ENetProtocol * command;
ENetPeer * peer;
enet_uint8 * currentData;
size_t commandCount;
if (host -> receivedDataLength < sizeof (ENetProtocolHeader))
return 0;
header = (ENetProtocolHeader *) host -> receivedData;
header -> peerID = ENET_NET_TO_HOST_16 (header -> peerID);
header -> sentTime = ENET_NET_TO_HOST_32 (header -> sentTime);
if (header -> peerID == 0xFFFF)
peer = NULL;
else
if (header -> peerID >= host -> peerCount)
return 0;
else
{
peer = & host -> peers [header -> peerID];
if (peer -> state == ENET_PEER_STATE_DISCONNECTED ||
peer -> state == ENET_PEER_STATE_ZOMBIE ||
host -> receivedAddress.host != peer -> address.host ||
header -> challenge != peer -> challenge)
return 0;
else
peer -> address.port = host -> receivedAddress.port;
}
if (peer != NULL)
peer -> incomingDataTotal += host -> receivedDataLength;
commandCount = header -> commandCount;
currentData = host -> receivedData + sizeof (ENetProtocolHeader);
while (commandCount > 0 &&
currentData < & host -> receivedData [host -> receivedDataLength])
{
command = (ENetProtocol *) currentData;
if (currentData + sizeof (ENetProtocolCommandHeader) > & host -> receivedData [host -> receivedDataLength])
return 0;
command -> header.commandLength = ENET_NET_TO_HOST_32 (command -> header.commandLength);
if (currentData + command -> header.commandLength > & host -> receivedData [host -> receivedDataLength])
return 0;
-- commandCount;
currentData += command -> header.commandLength;
if (peer == NULL)
{
if (command -> header.command != ENET_PROTOCOL_COMMAND_CONNECT)
return 0;
}
command -> header.reliableSequenceNumber = ENET_NET_TO_HOST_32 (command -> header.reliableSequenceNumber);
switch (command -> header.command)
{
case ENET_PROTOCOL_COMMAND_ACKNOWLEDGE:
enet_protocol_handle_acknowledge (host, event, peer, command);
break;
case ENET_PROTOCOL_COMMAND_CONNECT:
peer = enet_protocol_handle_connect (host, header, command);
break;
case ENET_PROTOCOL_COMMAND_VERIFY_CONNECT:
enet_protocol_handle_verify_connect (host, event, peer, command);
break;
case ENET_PROTOCOL_COMMAND_DISCONNECT:
enet_protocol_handle_disconnect (host, peer, command);
break;
case ENET_PROTOCOL_COMMAND_PING:
enet_protocol_handle_ping (host, peer, command);
break;
case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
enet_protocol_handle_send_reliable (host, peer, command);
break;
case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
enet_protocol_handle_send_unreliable (host, peer, command);
break;
case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
enet_protocol_handle_send_fragment (host, peer, command);
break;
case ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT:
enet_protocol_handle_bandwidth_limit (host, peer, command);
break;
case ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE:
enet_protocol_handle_throttle_configure (host, peer, command);
break;
default:
break;
}
if (peer != NULL &&
(command -> header.flags & ENET_PROTOCOL_FLAG_ACKNOWLEDGE) != 0)
{
switch (peer -> state)
{
case ENET_PEER_STATE_DISCONNECTING:
break;
case ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT:
if (command -> header.command != ENET_PROTOCOL_COMMAND_DISCONNECT)
break;
default:
enet_peer_queue_acknowledgement (peer, command, header -> sentTime);
break;
}
}
}
if (event -> type != ENET_EVENT_TYPE_NONE)
return 1;
return 0;
}
static int
enet_protocol_handle_acknowledge (ENetHost * host, ENetEvent * event, ENetPeer * peer, const ENetProtocol * command)
{
enet_uint32 roundTripTime,
receivedSentTime,
receivedReliableSequenceNumber;
ENetProtocolCommand commandNumber;
if (command -> header.commandLength < sizeof (ENetProtocolAcknowledge))
return 0;
receivedSentTime = ENET_NET_TO_HOST_32 (command -> acknowledge.receivedSentTime);
if (ENET_TIME_LESS (timeCurrent, receivedSentTime))
return 0;
peer -> lastReceiveTime = timeCurrent;
roundTripTime = ENET_TIME_DIFFERENCE (timeCurrent, receivedSentTime);
enet_peer_throttle (peer, roundTripTime);
peer -> roundTripTimeVariance -= peer -> roundTripTimeVariance / 4;
if (roundTripTime >= peer -> roundTripTime)
{
peer -> roundTripTime += (roundTripTime - peer -> roundTripTime) / 8;
peer -> roundTripTimeVariance += (roundTripTime - peer -> roundTripTime) / 4;
}
else
{
peer -> roundTripTime -= (peer -> roundTripTime - roundTripTime) / 8;
peer -> roundTripTimeVariance += (peer -> roundTripTime - roundTripTime) / 4;
}
if (peer -> roundTripTime < peer -> lowestRoundTripTime)
peer -> lowestRoundTripTime = peer -> roundTripTime;
if (peer -> roundTripTimeVariance > peer -> highestRoundTripTimeVariance)
peer -> highestRoundTripTimeVariance = peer -> roundTripTimeVariance;
if (peer -> packetThrottleEpoch == 0 ||
ENET_TIME_DIFFERENCE(timeCurrent, peer -> packetThrottleEpoch) >= peer -> packetThrottleInterval)
{
peer -> lastRoundTripTime = peer -> lowestRoundTripTime;
peer -> lastRoundTripTimeVariance = peer -> highestRoundTripTimeVariance;
peer -> lowestRoundTripTime = peer -> roundTripTime;
peer -> highestRoundTripTimeVariance = peer -> roundTripTimeVariance;
peer -> packetThrottleEpoch = timeCurrent;
}
receivedReliableSequenceNumber = ENET_NET_TO_HOST_32 (command -> acknowledge.receivedReliableSequenceNumber);
commandNumber = enet_protocol_remove_sent_reliable_command (peer, receivedReliableSequenceNumber, command -> header.channelID);
switch (peer -> state)
{
case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
if (commandNumber != ENET_PROTOCOL_COMMAND_VERIFY_CONNECT)
return 0;
host -> recalculateBandwidthLimits = 1;
peer -> state = ENET_PEER_STATE_CONNECTED;
event -> type = ENET_EVENT_TYPE_CONNECT;
event -> peer = peer;
return 1;
case ENET_PEER_STATE_DISCONNECTING:
if (commandNumber != ENET_PROTOCOL_COMMAND_DISCONNECT)
return 0;
host -> recalculateBandwidthLimits = 1;
event -> type = ENET_EVENT_TYPE_DISCONNECT;
event -> peer = peer;
enet_peer_reset (peer);
return 1;
default:
break;
}
return 0;
}
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);
}
static ENetPeer *
enet_protocol_handle_connect (ENetHost * host, const ENetProtocolHeader * header, const ENetProtocol * command)
{
enet_uint16 mtu;
enet_uint32 windowSize;
ENetChannel * channel;
size_t channelCount;
ENetPeer * currentPeer;
ENetProtocol verifyCommand;
if (command -> header.commandLength < sizeof (ENetProtocolConnect))
return NULL;
channelCount = ENET_NET_TO_HOST_32 (command -> connect.channelCount);
if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT ||
channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
return NULL;
for (currentPeer = host -> peers;
currentPeer < & host -> peers [host -> peerCount];
++ currentPeer)
{
if (currentPeer -> state != ENET_PEER_STATE_DISCONNECTED &&
currentPeer -> address.host == host -> receivedAddress.host &&
currentPeer -> address.port == host -> receivedAddress.port &&
currentPeer -> challenge == header -> challenge)
return NULL;
}
for (currentPeer = host -> peers;
currentPeer < & host -> peers [host -> peerCount];
++ currentPeer)
{
if (currentPeer -> state == ENET_PEER_STATE_DISCONNECTED)
break;
}
if (currentPeer >= & host -> peers [host -> peerCount])
return NULL;
currentPeer -> state = ENET_PEER_STATE_ACKNOWLEDGING_CONNECT;
currentPeer -> challenge = header -> challenge;
currentPeer -> address = host -> receivedAddress;
currentPeer -> outgoingPeerID = ENET_NET_TO_HOST_16 (command -> connect.outgoingPeerID);
currentPeer -> incomingBandwidth = ENET_NET_TO_HOST_32 (command -> connect.incomingBandwidth);
currentPeer -> outgoingBandwidth = ENET_NET_TO_HOST_32 (command -> connect.outgoingBandwidth);
currentPeer -> packetThrottleInterval = ENET_NET_TO_HOST_32 (command -> connect.packetThrottleInterval);
currentPeer -> packetThrottleAcceleration = ENET_NET_TO_HOST_32 (command -> connect.packetThrottleAcceleration);
currentPeer -> packetThrottleDeceleration = ENET_NET_TO_HOST_32 (command -> connect.packetThrottleDeceleration);
currentPeer -> channels = (ENetChannel *) enet_malloc (channelCount * sizeof (ENetChannel));
currentPeer -> channelCount = channelCount;
for (channel = currentPeer -> channels;
channel < & currentPeer -> channels [channelCount];
++ channel)
{
channel -> outgoingReliableSequenceNumber = 0;
channel -> outgoingUnreliableSequenceNumber = 0;
channel -> incomingReliableSequenceNumber = 0;
channel -> incomingUnreliableSequenceNumber = 0;
enet_list_clear (& channel -> incomingReliableCommands);
enet_list_clear (& channel -> incomingUnreliableCommands);
}
mtu = ENET_NET_TO_HOST_16 (command -> connect.mtu);
if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
mtu = ENET_PROTOCOL_MINIMUM_MTU;
else
if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
mtu = ENET_PROTOCOL_MAXIMUM_MTU;
currentPeer -> mtu = mtu;
if (host -> outgoingBandwidth == 0 &&
currentPeer -> incomingBandwidth == 0)
currentPeer -> windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else
currentPeer -> windowSize = (ENET_MIN (host -> outgoingBandwidth, currentPeer -> incomingBandwidth) /
ENET_PEER_WINDOW_SIZE_SCALE) *
ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (currentPeer -> windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
currentPeer -> windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else
if (currentPeer -> windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
currentPeer -> windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
if (host -> incomingBandwidth == 0)
windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else
windowSize = (host -> incomingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) *
ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (windowSize > ENET_NET_TO_HOST_32 (command -> connect.windowSize))
windowSize = ENET_NET_TO_HOST_32 (command -> connect.windowSize);
if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else
if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
verifyCommand.header.command = ENET_PROTOCOL_COMMAND_VERIFY_CONNECT;
verifyCommand.header.channelID = 0xFF;
verifyCommand.header.flags = ENET_PROTOCOL_FLAG_ACKNOWLEDGE;
verifyCommand.header.commandLength = sizeof (ENetProtocolVerifyConnect);
verifyCommand.verifyConnect.outgoingPeerID = ENET_HOST_TO_NET_16 (currentPeer -> incomingPeerID);
verifyCommand.verifyConnect.mtu = ENET_HOST_TO_NET_16 (currentPeer -> mtu);
verifyCommand.verifyConnect.windowSize = ENET_HOST_TO_NET_32 (windowSize);
verifyCommand.verifyConnect.channelCount = ENET_HOST_TO_NET_32 (channelCount);
verifyCommand.verifyConnect.incomingBandwidth = ENET_HOST_TO_NET_32 (host -> incomingBandwidth);
verifyCommand.verifyConnect.outgoingBandwidth = ENET_HOST_TO_NET_32 (host -> outgoingBandwidth);
verifyCommand.verifyConnect.packetThrottleInterval = ENET_HOST_TO_NET_32 (currentPeer -> packetThrottleInterval);
verifyCommand.verifyConnect.packetThrottleAcceleration = ENET_HOST_TO_NET_32 (currentPeer -> packetThrottleAcceleration);
verifyCommand.verifyConnect.packetThrottleDeceleration = ENET_HOST_TO_NET_32 (currentPeer -> packetThrottleDeceleration);
enet_peer_queue_outgoing_command (currentPeer, & verifyCommand, NULL, 0, 0);
return currentPeer;
}
uint32_t getip(uint32_t ip)
{
if (!geoip) return 0u;
ip = ENET_NET_TO_HOST_32(ip);
return getip(GeoIP_country_code_by_ipnum(geoip, ip));
}
