예제 #1
0
파일: peer.cpp 프로젝트: Kittnz/FoxEmu
/** Request a disconnection from a peer.
    @param peer peer to request a disconnection
    @param data data describing the disconnection
    @remarks An ENET_EVENT_DISCONNECT event will be generated by enet_host_service()
    once the disconnection is complete.
*/
void
enet_peer_disconnect (ENetPeer * peer, enet_uint32 data)
{
    ENetProtocol command;

    if (peer -> state == ENET_PEER_STATE_DISCONNECTING ||
        peer -> state == ENET_PEER_STATE_DISCONNECTED ||
        peer -> state == ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT ||
        peer -> state == ENET_PEER_STATE_ZOMBIE)
      return;

    enet_peer_reset_queues (peer);

    command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT;
    command.header.channelID = 0xFF;
    command.disconnect.data = ENET_HOST_TO_NET_32 (data);

    if (peer -> state == ENET_PEER_STATE_CONNECTED || peer -> state == ENET_PEER_STATE_DISCONNECT_LATER)
      command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
    else
      command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;      
    
    enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);

    if (peer -> state == ENET_PEER_STATE_CONNECTED || peer -> state == ENET_PEER_STATE_DISCONNECT_LATER)
      peer -> state = ENET_PEER_STATE_DISCONNECTING;
    else
    {
        enet_host_flush (peer -> host);
        enet_peer_reset (peer);
    }
}
예제 #2
0
파일: peer.c 프로젝트: bsegovia/cube-gles
/** Request a disconnection from a peer.
    @param peer peer to request a disconnection
    @remarks An ENET_EVENT_DISCONNECT event will be generated by enet_host_service()
    once the disconnection is complete.
*/
void
enet_peer_disconnect (ENetPeer * peer)
{
    ENetProtocol command;

    if (peer -> state == ENET_PEER_STATE_DISCONNECTING ||
        peer -> state == ENET_PEER_STATE_DISCONNECTED ||
        peer -> state == ENET_PEER_STATE_ZOMBIE)
      return;

    enet_peer_reset_queues (peer);

    command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT;
    command.header.channelID = 0xFF;
    command.header.flags = ENET_PROTOCOL_FLAG_UNSEQUENCED;
    command.header.commandLength = sizeof (ENetProtocolDisconnect);

    if (peer -> state == ENET_PEER_STATE_CONNECTED)
      command.header.flags = ENET_PROTOCOL_FLAG_ACKNOWLEDGE;

    enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);

    if (peer -> state == ENET_PEER_STATE_CONNECTED)
      peer -> state = ENET_PEER_STATE_DISCONNECTING;
    else
    {
        enet_host_flush (peer -> host);
        enet_peer_reset (peer);
    }
}
예제 #3
0
파일: peer.c 프로젝트: wangeek/Egoboo
/** Force an immediate disconnection from a peer.
    @param peer peer to disconnect
    @remarks No ENET_EVENT_DISCONNECT event will be generated. The foreign peer is not
    guarenteed to receive the disconnect notification, and is reset immediately upon
    return from this function.
*/
void
enet_peer_disconnect_now (ENetPeer * peer)
{
    ENetProtocol command;

    if (peer -> state != ENET_PEER_STATE_DISCONNECTED)
      return;

    if (peer -> state != ENET_PEER_STATE_ZOMBIE &&
        peer -> state != ENET_PEER_STATE_DISCONNECTING)
    {
        enet_peer_reset_queues (peer);

        command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT;
        command.header.channelID = 0xFF;
        command.header.flags = 0;
        command.header.commandLength = sizeof (ENetProtocolDisconnect);

        enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);

        enet_host_flush (peer -> host);
    }

    enet_peer_reset (peer);
}
예제 #4
0
파일: peer.cpp 프로젝트: Kittnz/FoxEmu
/** Sends a ping request to a peer.
    @param peer destination for the ping request
    @remarks ping requests factor into the mean round trip time as designated by the 
    roundTripTime field in the ENetPeer structure.  Enet automatically pings all connected
    peers at regular intervals, however, this function may be called to ensure more
    frequent ping requests.
*/
void
enet_peer_ping (ENetPeer * peer)
{
    ENetProtocol command;

    if (peer -> state != ENET_PEER_STATE_CONNECTED)
      return;

    command.header.command = ENET_PROTOCOL_COMMAND_PING | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
    command.header.channelID = 0xFF;
   
    enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);
}
예제 #5
0
파일: peer.cpp 프로젝트: Kittnz/FoxEmu
/** Configures throttle parameter for a peer.

    Unreliable packets are dropped by ENet in response to the varying conditions
    of the Internet connection to the peer.  The throttle represents a probability
    that an unreliable packet should not be dropped and thus sent by ENet to the peer.
    The lowest mean round trip time from the sending of a reliable packet to the
    receipt of its acknowledgement is measured over an amount of time specified by
    the interval parameter in milliseconds.  If a measured round trip time happens to
    be significantly less than the mean round trip time measured over the interval, 
    then the throttle probability is increased to allow more traffic by an amount
    specified in the acceleration parameter, which is a ratio to the ENET_PEER_PACKET_THROTTLE_SCALE
    constant.  If a measured round trip time happens to be significantly greater than
    the mean round trip time measured over the interval, then the throttle probability
    is decreased to limit traffic by an amount specified in the deceleration parameter, which
    is a ratio to the ENET_PEER_PACKET_THROTTLE_SCALE constant.  When the throttle has
    a value of ENET_PEER_PACKET_THROTTLE_SCALE, on unreliable packets are dropped by 
    ENet, and so 100% of all unreliable packets will be sent.  When the throttle has a
    value of 0, all unreliable packets are dropped by ENet, and so 0% of all unreliable
    packets will be sent.  Intermediate values for the throttle represent intermediate
    probabilities between 0% and 100% of unreliable packets being sent.  The bandwidth
    limits of the local and foreign hosts are taken into account to determine a 
    sensible limit for the throttle probability above which it should not raise even in
    the best of conditions.

    @param peer peer to configure 
    @param interval interval, in milliseconds, over which to measure lowest mean RTT; the default value is ENET_PEER_PACKET_THROTTLE_INTERVAL.
    @param acceleration rate at which to increase the throttle probability as mean RTT declines
    @param deceleration rate at which to decrease the throttle probability as mean RTT increases
*/
void
enet_peer_throttle_configure (ENetPeer * peer, enet_uint32 interval, enet_uint32 acceleration, enet_uint32 deceleration)
{
    ENetProtocol command;

    peer -> packetThrottleInterval = interval;
    peer -> packetThrottleAcceleration = acceleration;
    peer -> packetThrottleDeceleration = deceleration;

    command.header.command = ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
    command.header.channelID = 0xFF;

    command.throttleConfigure.packetThrottleInterval = ENET_HOST_TO_NET_32 (interval);
    command.throttleConfigure.packetThrottleAcceleration = ENET_HOST_TO_NET_32 (acceleration);
    command.throttleConfigure.packetThrottleDeceleration = ENET_HOST_TO_NET_32 (deceleration);

    enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);
}
예제 #6
0
파일: peer.cpp 프로젝트: Kittnz/FoxEmu
/** Force an immediate disconnection from a peer.
    @param peer peer to disconnect
    @param data data describing the disconnection
    @remarks No ENET_EVENT_DISCONNECT event will be generated. The foreign peer is not
    guarenteed to receive the disconnect notification, and is reset immediately upon
    return from this function.
*/
void
enet_peer_disconnect_now (ENetPeer * peer, enet_uint32 data)
{
    ENetProtocol command;

    if (peer -> state == ENET_PEER_STATE_DISCONNECTED)
      return;

    if (peer -> state != ENET_PEER_STATE_ZOMBIE &&
        peer -> state != ENET_PEER_STATE_DISCONNECTING)
    {
        enet_peer_reset_queues (peer);

        command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
        command.header.channelID = 0xFF;
        command.disconnect.data = ENET_HOST_TO_NET_32 (data);

        enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);

        enet_host_flush (peer -> host);
    }

    enet_peer_reset (peer);
}
예제 #7
0
파일: host.c 프로젝트: STLVNUB/blitzmax
void
enet_host_bandwidth_throttle (ENetHost * host)
{
    enet_uint32 timeCurrent = enet_time_get (),
           elapsedTime = timeCurrent - host -> bandwidthThrottleEpoch,
           peersTotal = 0,
           dataTotal = 0,
           peersRemaining,
           bandwidth,
           throttle = 0,
           bandwidthLimit = 0;
    int needsAdjustment;
    ENetPeer * peer;
    ENetProtocol command;

    if (elapsedTime < ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
      return;

    for (peer = host -> peers;
         peer < & host -> peers [host -> peerCount];
         ++ peer)
    {
        if (peer -> state != ENET_PEER_STATE_CONNECTED)
          continue;

        ++ peersTotal;
        dataTotal += peer -> outgoingDataTotal;
    }

    if (peersTotal == 0)
      return;

    peersRemaining = peersTotal;
    needsAdjustment = 1;

    if (host -> outgoingBandwidth == 0)
      bandwidth = ~0;
    else
      bandwidth = (host -> outgoingBandwidth * elapsedTime) / 1000;

    while (peersRemaining > 0 && needsAdjustment != 0)
    {
        needsAdjustment = 0;
        
        if (dataTotal < bandwidth)
          throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
        else
          throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;

        for (peer = host -> peers;
             peer < & host -> peers [host -> peerCount];
             ++ peer)
        {
            enet_uint32 peerBandwidth;
            
            if (peer -> state != ENET_PEER_STATE_CONNECTED ||
                peer -> incomingBandwidth == 0 ||
                peer -> outgoingBandwidthThrottleEpoch == timeCurrent)
              continue;

            peerBandwidth = (peer -> incomingBandwidth * elapsedTime) / 1000;
            if ((throttle * peer -> outgoingDataTotal) / ENET_PEER_PACKET_THROTTLE_SCALE <= peerBandwidth)
              continue;

            peer -> packetThrottleLimit = (peerBandwidth * 
                                            ENET_PEER_PACKET_THROTTLE_SCALE) / peer -> outgoingDataTotal;
            
            if (peer -> packetThrottleLimit == 0)
              peer -> packetThrottleLimit = 1;
            
            if (peer -> packetThrottle > peer -> packetThrottleLimit)
              peer -> packetThrottle = peer -> packetThrottleLimit;

            peer -> outgoingBandwidthThrottleEpoch = timeCurrent;

            
            needsAdjustment = 1;
            -- peersRemaining;
            bandwidth -= peerBandwidth;
            dataTotal -= peerBandwidth;
        }
    }

    if (peersRemaining > 0)
    for (peer = host -> peers;
         peer < & host -> peers [host -> peerCount];
         ++ peer)
    {
        if (peer -> state != ENET_PEER_STATE_CONNECTED ||
            peer -> outgoingBandwidthThrottleEpoch == timeCurrent)
          continue;

        peer -> packetThrottleLimit = throttle;

        if (peer -> packetThrottle > peer -> packetThrottleLimit)
          peer -> packetThrottle = peer -> packetThrottleLimit;
    }
    
    if (host -> recalculateBandwidthLimits)
    {
       host -> recalculateBandwidthLimits = 0;

       peersRemaining = peersTotal;
       bandwidth = host -> incomingBandwidth;
       needsAdjustment = 1;

       if (bandwidth == 0)
         bandwidthLimit = 0;
       else
       while (peersRemaining > 0 && needsAdjustment != 0)
       {
           needsAdjustment = 0;
           bandwidthLimit = bandwidth / peersRemaining;

           for (peer = host -> peers;
                peer < & host -> peers [host -> peerCount];
                ++ peer)
           {
               if (peer -> state != ENET_PEER_STATE_CONNECTED ||
                   peer -> incomingBandwidthThrottleEpoch == timeCurrent)
                 continue;

               if (peer -> outgoingBandwidth > 0 &&
                   bandwidthLimit > peer -> outgoingBandwidth)
                 continue;

               peer -> incomingBandwidthThrottleEpoch = timeCurrent;
 
               needsAdjustment = 1;
               -- peersRemaining;
               bandwidth -= peer -> outgoingBandwidth;
           }
       }

       for (peer = host -> peers;
            peer < & host -> peers [host -> peerCount];
            ++ peer)
       {
           if (peer -> state != ENET_PEER_STATE_CONNECTED)
             continue;

           command.header.command = ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT;
           command.header.channelID = 0xFF;
           command.header.flags = 0;
           command.header.commandLength = sizeof (ENetProtocolBandwidthLimit);
           command.bandwidthLimit.outgoingBandwidth = ENET_HOST_TO_NET_32 (host -> outgoingBandwidth);

           if (peer -> incomingBandwidthThrottleEpoch == timeCurrent)
             command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32 (peer -> outgoingBandwidth);
           else
             command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32 (bandwidthLimit);

           enet_peer_queue_outgoing_command (peer, & command, NULL, 0, 0);
       } 
    }

    host -> bandwidthThrottleEpoch = timeCurrent;

    for (peer = host -> peers;
         peer < & host -> peers [host -> peerCount];
         ++ peer)
    {
        peer -> incomingDataTotal = 0;
        peer -> outgoingDataTotal = 0;
    }
}
예제 #8
0
파일: host.c 프로젝트: STLVNUB/blitzmax
/** Initiates a connection to a foreign host.
    @param host host seeking the connection
    @param address destination for the connection
    @param channelCount number of channels to allocate
    @returns a peer representing the foreign host on success, NULL on failure
    @remarks The peer returned will have not completed the connection until enet_host_service()
    notifies of an ENET_EVENT_TYPE_CONNECT event for the peer.
*/
ENetPeer *
enet_host_connect (ENetHost * host, const ENetAddress * address, size_t channelCount)
{
    ENetPeer * currentPeer;
    ENetChannel * channel;
    ENetProtocol command;

    if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
      channelCount = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
    else
    if (channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
      channelCount = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;

    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_CONNECTING;
    currentPeer -> address = * address;
    currentPeer -> channels = (ENetChannel *) enet_malloc (channelCount * sizeof (ENetChannel));
    currentPeer -> channelCount = channelCount;
    currentPeer -> challenge = (enet_uint32) rand ();

    if (host -> outgoingBandwidth == 0)
      currentPeer -> windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
    else
      currentPeer -> windowSize = (host -> outgoingBandwidth /
                                    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;
         
    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);
    }
        
    command.header.command = ENET_PROTOCOL_COMMAND_CONNECT;
    command.header.channelID = 0xFF;
    command.header.flags = ENET_PROTOCOL_FLAG_ACKNOWLEDGE;
    command.header.commandLength = sizeof (ENetProtocolConnect);
    command.connect.outgoingPeerID = ENET_HOST_TO_NET_16 (currentPeer -> incomingPeerID);
    command.connect.mtu = ENET_HOST_TO_NET_16 (currentPeer -> mtu);
    command.connect.windowSize = ENET_HOST_TO_NET_32 (currentPeer -> windowSize);
    command.connect.channelCount = ENET_HOST_TO_NET_32 (channelCount);
    command.connect.incomingBandwidth = ENET_HOST_TO_NET_32 (host -> incomingBandwidth);
    command.connect.outgoingBandwidth = ENET_HOST_TO_NET_32 (host -> outgoingBandwidth);
    command.connect.packetThrottleInterval = ENET_HOST_TO_NET_32 (currentPeer -> packetThrottleInterval);
    command.connect.packetThrottleAcceleration = ENET_HOST_TO_NET_32 (currentPeer -> packetThrottleAcceleration);
    command.connect.packetThrottleDeceleration = ENET_HOST_TO_NET_32 (currentPeer -> packetThrottleDeceleration);
    
    enet_peer_queue_outgoing_command (currentPeer, & command, NULL, 0, 0);

    return currentPeer;
}
예제 #9
0
파일: peer.cpp 프로젝트: Kittnz/FoxEmu
/** 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;
}
예제 #10
0
파일: peer.c 프로젝트: bsegovia/cube-gles
/** 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;
}
예제 #11
0
파일: protocol.c 프로젝트: wangeek/Egoboo
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;
}