From 5bdbc0f762bf3a7cc38ebda0757de234c45b5f65 Mon Sep 17 00:00:00 2001
From: Fabio Alessandrelli <fabio.alessandrelli@gmail.com>
Date: Sun, 22 Jan 2017 05:53:08 +0100
Subject: [PATCH] Convert ENetAddress host to 16 bytes to accomote IPv6

---
 thirdparty/enet/enet/enet.h | 21 ++++++++++++++-------
 thirdparty/enet/host.c      |  2 +-
 thirdparty/enet/protocol.c  |  9 ++++-----
 3 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/thirdparty/enet/enet/enet.h b/thirdparty/enet/enet/enet.h
index 650b199ee5b..8c9ad5463e7 100644
--- a/thirdparty/enet/enet/enet.h
+++ b/thirdparty/enet/enet/enet.h
@@ -12,11 +12,7 @@ extern "C"
 
 #include <stdlib.h>
 
-#ifdef _WIN32
-#include "enet/win32.h"
-#else
-#include "enet/unix.h"
-#endif
+#include "enet/godot.h"
 
 #include "enet/types.h"
 #include "enet/protocol.h"
@@ -72,7 +68,6 @@ typedef enum _ENetSocketShutdown
     ENET_SOCKET_SHUTDOWN_READ_WRITE = 2
 } ENetSocketShutdown;
 
-#define ENET_HOST_ANY       0
 #define ENET_HOST_BROADCAST 0xFFFFFFFFU
 #define ENET_PORT_ANY       0
 
@@ -88,9 +83,11 @@ typedef enum _ENetSocketShutdown
  */
 typedef struct _ENetAddress
 {
-   enet_uint32 host;
+   uint8_t host[16];
    enet_uint16 port;
+   uint8_t wildcard;
 } ENetAddress;
+#define enet_host_equal(host_a, host_b) (memcmp(&host_a, &host_b,16) == 0)
 
 /**
  * Packet flag bit constants.
@@ -519,6 +516,16 @@ ENET_API int        enet_socketset_select (ENetSocket, ENetSocketSet *, ENetSock
 */
 ENET_API int enet_address_set_host (ENetAddress * address, const char * hostName);
 
+/** Sets the host field in the address parameter from ip struct.
+    @param address destination to store resolved address
+    @param ip the ip struct to read from
+    @param size the size of the ip struct.
+    @retval 0 on success
+    @retval != 0 on failure
+    @returns the address of the given ip in address on success.
+*/
+ENET_API void enet_address_set_ip(ENetAddress * address, const uint8_t * ip, size_t size);
+
 /** Gives the printable form of the IP address specified in the address parameter.
     @param address    address printed
     @param hostName   destination for name, must not be NULL
diff --git a/thirdparty/enet/host.c b/thirdparty/enet/host.c
index 3be6c0922cb..fc4da4ca67f 100644
--- a/thirdparty/enet/host.c
+++ b/thirdparty/enet/host.c
@@ -87,7 +87,7 @@ enet_host_create (const ENetAddress * address, size_t peerCount, size_t channelL
     host -> commandCount = 0;
     host -> bufferCount = 0;
     host -> checksum = NULL;
-    host -> receivedAddress.host = ENET_HOST_ANY;
+    memset(host -> receivedAddress.host, 0, 16);
     host -> receivedAddress.port = 0;
     host -> receivedData = NULL;
     host -> receivedDataLength = 0;
diff --git a/thirdparty/enet/protocol.c b/thirdparty/enet/protocol.c
index 4a2a4ed185a..cbeea1a763a 100644
--- a/thirdparty/enet/protocol.c
+++ b/thirdparty/enet/protocol.c
@@ -299,7 +299,7 @@ enet_protocol_handle_connect (ENetHost * host, ENetProtocolHeader * header, ENet
         }
         else 
         if (currentPeer -> state != ENET_PEER_STATE_CONNECTING &&
-            currentPeer -> address.host == host -> receivedAddress.host)
+            enet_host_equal(currentPeer -> address.host, host -> receivedAddress.host))
         {
             if (currentPeer -> address.port == host -> receivedAddress.port &&
                 currentPeer -> connectID == command -> connect.connectID)
@@ -1011,9 +1011,8 @@ enet_protocol_handle_incoming_commands (ENetHost * host, ENetEvent * event)
 
        if (peer -> state == ENET_PEER_STATE_DISCONNECTED ||
            peer -> state == ENET_PEER_STATE_ZOMBIE ||
-           ((host -> receivedAddress.host != peer -> address.host ||
-             host -> receivedAddress.port != peer -> address.port) &&
-             peer -> address.host != ENET_HOST_BROADCAST) ||
+           (!enet_host_equal(host -> receivedAddress.host, peer -> address.host) ||
+             host -> receivedAddress.port != peer -> address.port) ||
            (peer -> outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID &&
             sessionID != peer -> incomingSessionID))
          return 0;
@@ -1055,7 +1054,7 @@ enet_protocol_handle_incoming_commands (ENetHost * host, ENetEvent * event)
        
     if (peer != NULL)
     {
-       peer -> address.host = host -> receivedAddress.host;
+       enet_address_set_ip(&(peer -> address), host -> receivedAddress.host, 16);
        peer -> address.port = host -> receivedAddress.port;
        peer -> incomingDataTotal += host -> receivedDataLength;
     }