Common socket error handling

include/network.h

@@ -38,6 +38,8 @@
 #   include <winsock2.h>
 #   include <ws2tcpip.h>
 #   define ENETUNREACH WSAENETUNREACH
+#   define net_errno (WSAGetLastError())
+extern const char *net_strerror( int val );
 #else
 #   if HAVE_SYS_SOCKET_H
 #      include <sys/socket.h>
@@ -51,6 +53,8 @@
 #      include <net/netdb.h>
 #   endif
 #   include <netdb.h>
+#   define net_errno errno
+#   define net_strerror strerror
 #endif
 
 # ifdef __cplusplus

src/Makefile.am

@@ -305,6 +305,7 @@ SOURCES_libvlc_common = \
 	network/acl.c \
 	network/getaddrinfo.c \
 	network/io.c \
+	network/net_error.c \
 	network/tcp.c \
 	network/udp.c \
 	network/httpd.c \

src/network/net_error.c

+/*****************************************************************************
+ * net_error.c: Network error handling
+ *****************************************************************************
+ * Copyright (C) 2006 Rémi Denis-Courmont
+ * $Id$
+ *
+ * Author : Rémi Denis-Courmont <rem # videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <vlc/vlc.h>
+#include <errno.h>
+#include "network.h"
+
+#if defined (WIN32) || defined (UNDER_CE)
+const char *net_strerror( int value )
+{
+    /* There doesn't seem to be any portable error message generation for
+     * Winsock errors. Some old versions had s_error, but it appears to be
+     * gone, and is not documented.
+     */
+
+    switch( value )
+    {
+        /* Feel free to add any error message as you see fit */
+        case WSAENETUNREACH:
+            return "Destination unreachable";
+
+        case WSAETIMEDOUT:
+            return "Connection timed out";
+
+        case WSAECONNREFUSED:
+            return "Connection refused";
+
+        default:
+        {
+            static char errmsg[14 + 5 + 1];
+            /* Given PE don't support thread-local storage, this cannot be
+             * implemented in a thread-safe manner, I'm afraid. */
+
+            if( ((unsigned)value) > 99999 ) /* avoid overflow */
+                return "Invalid error code";
+
+            sprintf( errmsg, "Winsock error %u", (unsigned)value );
+            return errmsg;
+        }
+    }
+
+    return strerror( value );
+}
+#endif