From 726ff6bc6d0f596b8ff067f5ac10708d385767d3 Mon Sep 17 00:00:00 2001
From: Lee Salzman <lsalzman@gmail.com>
Date: Wed, 20 Mar 2013 00:43:34 +0200
Subject: [PATCH] query the socket name if an explicit address binding is
 requested on host creation

---
 host.c              |  2 +-
 include/enet/enet.h |  1 +
 unix.c              | 15 +++++++++++++++
 win32.c             | 15 +++++++++++++++
 4 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/host.c b/host.c
index d0ee595..92fe1b6 100644
--- a/host.c
+++ b/host.c
@@ -66,7 +66,7 @@ enet_host_create (const ENetAddress * address, size_t peerCount, size_t channelL
     enet_socket_set_option (host -> socket, ENET_SOCKOPT_RCVBUF, ENET_HOST_RECEIVE_BUFFER_SIZE);
     enet_socket_set_option (host -> socket, ENET_SOCKOPT_SNDBUF, ENET_HOST_SEND_BUFFER_SIZE);
 
-    if (address != NULL)
+    if (address != NULL && enet_socket_get_address (host -> socket, & host -> address) < 0)   
       host -> address = * address;
 
     if (! channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
diff --git a/include/enet/enet.h b/include/enet/enet.h
index 5f9d540..c0e6025 100644
--- a/include/enet/enet.h
+++ b/include/enet/enet.h
@@ -471,6 +471,7 @@ ENET_API void enet_time_set (enet_uint32);
 */
 ENET_API ENetSocket enet_socket_create (ENetSocketType);
 ENET_API int        enet_socket_bind (ENetSocket, const ENetAddress *);
+ENET_API int        enet_socket_get_address (ENetSocket, ENetAddress *);
 ENET_API int        enet_socket_listen (ENetSocket, int);
 ENET_API ENetSocket enet_socket_accept (ENetSocket, ENetAddress *);
 ENET_API int        enet_socket_connect (ENetSocket, const ENetAddress *);
diff --git a/unix.c b/unix.c
index d425b4b..fe8a280 100644
--- a/unix.c
+++ b/unix.c
@@ -194,6 +194,21 @@ enet_socket_bind (ENetSocket socket, const ENetAddress * address)
                  sizeof (struct sockaddr_in)); 
 }
 
+int
+enet_socket_get_address (ENetSocket socket, ENetAddress * address)
+{
+    struct sockaddr_in sin;
+    socklen_t sinLength = sizeof (struct sockaddr_in);
+
+    if (getsockname (socket, (struct sockaddr *) & sin, & sinLength) == -1)
+      return -1;
+
+    address -> host = (enet_uint32) sin.sin_addr.s_addr;
+    address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
+
+    return 0;
+}
+
 int 
 enet_socket_listen (ENetSocket socket, int backlog)
 {
diff --git a/win32.c b/win32.c
index dcc0791..99bdaaa 100644
--- a/win32.c
+++ b/win32.c
@@ -125,6 +125,21 @@ enet_socket_bind (ENetSocket socket, const ENetAddress * address)
                  sizeof (struct sockaddr_in)) == SOCKET_ERROR ? -1 : 0;
 }
 
+int
+enet_socket_get_address (ENetSocket socket, ENetAddress * address)
+{
+    struct sockaddr_in sin;
+    int sinLength = sizeof (struct sockaddr_in);
+
+    if (getsockname (socket, (struct sockaddr *) & sin, & sinLength) == -1)
+      return -1;
+
+    address -> host = (enet_uint32) sin.sin_addr.s_addr;
+    address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
+
+    return 0;
+}
+
 int
 enet_socket_listen (ENetSocket socket, int backlog)
 {