Updating enet to version 1.3.1

6 files changed, 62 insertions, 31 deletions

diff --git a/libs/enet/ChangeLog b/libs/enet/ChangeLog
index 45f14db..b1fc200 100644
--- a/libs/enet/ChangeLog
+++ b/libs/enet/ChangeLog
@@ -1,3 +1,9 @@
+ENet 1.3.1 (February 10, 2011):
+
+* fixed bug in tracking of reliable data in transit
+* reliable data window size now scales with the throttle
+* fixed bug in fragment length calculation when checksums are used
+
 ENet 1.3.0 (June 5, 2010):
 
 * enet_host_create() now requires the channel limit to be specified as
diff --git a/libs/enet/LICENSE b/libs/enet/LICENSE
index df0f91e..357a4e5 100644
--- a/libs/enet/LICENSE
+++ b/libs/enet/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2002-2010 Lee Salzman
+Copyright (c) 2002-2011 Lee Salzman
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
diff --git a/libs/enet/include/enet/enet.h b/libs/enet/include/enet/enet.h
index 2f656d6..b572590 100644
--- a/libs/enet/include/enet/enet.h
+++ b/libs/enet/include/enet/enet.h
@@ -25,7 +25,7 @@ extern "C"
 
 #define ENET_VERSION_MAJOR 1
 #define ENET_VERSION_MINOR 3
-#define ENET_VERSION_PATCH 0
+#define ENET_VERSION_PATCH 1
 #define ENET_VERSION_CREATE(major, minor, patch) (((major)<<16) | ((minor)<<8) | (patch))
 #define ENET_VERSION ENET_VERSION_CREATE(ENET_VERSION_MAJOR, ENET_VERSION_MINOR, ENET_VERSION_PATCH)
 
diff --git a/libs/enet/list.c b/libs/enet/list.c
index 8487200..1c1a8df 100644
--- a/libs/enet/list.c
+++ b/libs/enet/list.c
@@ -3,7 +3,7 @@
  @brief ENet linked list functions
 */
 #define ENET_BUILDING_LIB 1
-#include "enet/list.h"
+#include "enet/enet.h"
 
 /** 
     @defgroup list ENet linked list utility functions
diff --git a/libs/enet/peer.c b/libs/enet/peer.c
index d778ce1..e1c117f 100644
--- a/libs/enet/peer.c
+++ b/libs/enet/peer.c
@@ -108,6 +108,8 @@ enet_peer_send (ENetPeer * peer, enet_uint8 channelID, ENetPacket * packet)
      return -1;
 
    fragmentLength = peer -> mtu - sizeof (ENetProtocolHeader) - sizeof (ENetProtocolSendFragment);
+   if (peer -> host -> checksum != NULL)
+     fragmentLength -= sizeof(enet_uint32);
 
    if (packet -> dataLength > fragmentLength)
    {
diff --git a/libs/enet/protocol.c b/libs/enet/protocol.c
index 8e26dfb..2237ba8 100644
--- a/libs/enet/protocol.c
+++ b/libs/enet/protocol.c
@@ -172,6 +172,7 @@ enet_protocol_remove_sent_reliable_command (ENetPeer * peer, enet_uint16 reliabl
     ENetOutgoingCommand * outgoingCommand;
     ENetListIterator currentCommand;
     ENetProtocolCommand commandNumber;
+    int wasSent = 1;
 
     for (currentCommand = enet_list_begin (& peer -> sentReliableCommands);
          currentCommand != enet_list_end (& peer -> sentReliableCommands);
@@ -201,6 +202,8 @@ enet_protocol_remove_sent_reliable_command (ENetPeer * peer, enet_uint16 reliabl
 
        if (currentCommand == enet_list_end (& peer -> outgoingReliableCommands))
          return ENET_PROTOCOL_COMMAND_NONE;
+
+       wasSent = 0;
     }
 
     if (channelID < peer -> channelCount)
@@ -221,7 +224,8 @@ enet_protocol_remove_sent_reliable_command (ENetPeer * peer, enet_uint16 reliabl
 
     if (outgoingCommand -> packet != NULL)
     {
-       peer -> reliableDataInTransit -= outgoingCommand -> fragmentLength;
+       if (wasSent)
+         peer -> reliableDataInTransit -= outgoingCommand -> fragmentLength;
 
        -- outgoingCommand -> packet -> referenceCount;
 
@@ -1252,7 +1256,7 @@ enet_protocol_check_timeouts (ENetHost * host, ENetPeer * peer, ENetEvent * even
     return 0;
 }
 
-static void
+static int
 enet_protocol_send_reliable_outgoing_commands (ENetHost * host, ENetPeer * peer)
 {
     ENetProtocol * command = & host -> commands [host -> commandCount];
@@ -1262,6 +1266,7 @@ enet_protocol_send_reliable_outgoing_commands (ENetHost * host, ENetPeer * peer)
     ENetChannel *channel;
     enet_uint16 reliableWindow;
     size_t commandSize;
+    int windowExceeded = 0, windowWrap = 0, canPing = 1;
 
     currentCommand = enet_list_begin (& peer -> outgoingReliableCommands);
     
@@ -1271,37 +1276,54 @@ enet_protocol_send_reliable_outgoing_commands (ENetHost * host, ENetPeer * peer)
 
        channel = outgoingCommand -> command.header.channelID < peer -> channelCount ? & peer -> channels [outgoingCommand -> command.header.channelID] : NULL;
        reliableWindow = outgoingCommand -> reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
-       if (channel != NULL && 
-           outgoingCommand -> sendAttempts < 1 && 
-           ! (outgoingCommand -> reliableSequenceNumber % ENET_PEER_RELIABLE_WINDOW_SIZE) &&
-           (channel -> reliableWindows [(reliableWindow + ENET_PEER_RELIABLE_WINDOWS - 1) % ENET_PEER_RELIABLE_WINDOWS] >= ENET_PEER_RELIABLE_WINDOW_SIZE ||
-             channel -> usedReliableWindows & ((((1 << ENET_PEER_FREE_RELIABLE_WINDOWS) - 1) << reliableWindow) | 
-               (((1 << ENET_PEER_FREE_RELIABLE_WINDOWS) - 1) >> (ENET_PEER_RELIABLE_WINDOW_SIZE - reliableWindow)))))
-         break;
-  
+       if (channel != NULL)
+       {
+           if (! windowWrap &&      
+               outgoingCommand -> sendAttempts < 1 && 
+               ! (outgoingCommand -> reliableSequenceNumber % ENET_PEER_RELIABLE_WINDOW_SIZE) &&
+               (channel -> reliableWindows [(reliableWindow + ENET_PEER_RELIABLE_WINDOWS - 1) % ENET_PEER_RELIABLE_WINDOWS] >= ENET_PEER_RELIABLE_WINDOW_SIZE ||
+                 channel -> usedReliableWindows & ((((1 << ENET_PEER_FREE_RELIABLE_WINDOWS) - 1) << reliableWindow) | 
+                   (((1 << ENET_PEER_FREE_RELIABLE_WINDOWS) - 1) >> (ENET_PEER_RELIABLE_WINDOW_SIZE - reliableWindow)))))
+             windowWrap = 1;
+          if (windowWrap)
+          {
+             currentCommand = enet_list_next (currentCommand);
+ 
+             continue;
+          }
+       }
+ 
+       if (outgoingCommand -> packet != NULL)
+       {
+          if (! windowExceeded)
+          {
+             enet_uint32 windowSize = (peer -> packetThrottle * peer -> windowSize) / ENET_PEER_PACKET_THROTTLE_SCALE;
+             
+             if (peer -> reliableDataInTransit + outgoingCommand -> fragmentLength > ENET_MAX (windowSize, peer -> mtu))
+               windowExceeded = 1;
+          }
+          if (windowExceeded)
+          {
+             currentCommand = enet_list_next (currentCommand);
+
+             continue;
+          }
+       }
+
+       canPing = 0;
+
        commandSize = commandSizes [outgoingCommand -> command.header.command & ENET_PROTOCOL_COMMAND_MASK];
        if (command >= & host -> commands [sizeof (host -> commands) / sizeof (ENetProtocol)] ||
            buffer + 1 >= & host -> buffers [sizeof (host -> buffers) / sizeof (ENetBuffer)] ||
-           peer -> mtu - host -> packetSize < commandSize)
+           peer -> mtu - host -> packetSize < commandSize ||
+           (outgoingCommand -> packet != NULL && 
+             (enet_uint16) (peer -> mtu - host -> packetSize) < (enet_uint16) (commandSize + outgoingCommand -> fragmentLength)))
        {
           host -> continueSending = 1;
           
           break;
        }
 
-       if (outgoingCommand -> packet != NULL)
-       {
-          if (peer -> reliableDataInTransit + outgoingCommand -> fragmentLength > peer -> windowSize)
-            break;
-
-          if ((enet_uint16) (peer -> mtu - host -> packetSize) < (enet_uint16) (commandSize + outgoingCommand -> fragmentLength))
-          {
-             host -> continueSending = 1;
-
-             break;
-          }
-       }
-      
        currentCommand = enet_list_next (currentCommand);
 
        if (channel != NULL && outgoingCommand -> sendAttempts < 1)
@@ -1354,6 +1376,8 @@ enet_protocol_send_reliable_outgoing_commands (ENetHost * host, ENetPeer * peer)
 
     host -> commandCount = command - host -> commands;
     host -> bufferCount = buffer - host -> buffers;
+
+    return canPing;
 }
 
 static int
@@ -1391,10 +1415,9 @@ enet_protocol_send_outgoing_commands (ENetHost * host, ENetEvent * event, int ch
             enet_protocol_check_timeouts (host, currentPeer, event) == 1)
           return 1;
 
-        if (! enet_list_empty (& currentPeer -> outgoingReliableCommands))
-          enet_protocol_send_reliable_outgoing_commands (host, currentPeer);
-        else
-        if (enet_list_empty (& currentPeer -> sentReliableCommands) &&
+        if ((enet_list_empty (& currentPeer -> outgoingReliableCommands) ||
+              enet_protocol_send_reliable_outgoing_commands (host, currentPeer)) &&
+            enet_list_empty (& currentPeer -> sentReliableCommands) &&
             ENET_TIME_DIFFERENCE (host -> serviceTime, currentPeer -> lastReceiveTime) >= ENET_PEER_PING_INTERVAL &&
             currentPeer -> mtu - host -> packetSize >= sizeof (ENetProtocolPing))
         {