improve error checking and reporting when making a tcp/ip connection.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@24168 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,12 @@
+2006-11-29  Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/GSPrivate.h:
+	* Source/win32/GSFileHandleWin32.m:
+	* Source/Additions/GSCategories.m:
+	* Source/GSFileHandle.m:
+	Improve error checking and reporting when establishing a tcp/ip
+	connection.
+
 2006-11-27  Matt Rice  <ratmice@gmail.com>
 
 	* Source/NSObject.m: Fix typo.

Source/Additions/GSCategories.m

@@ -929,16 +929,25 @@ strerror(int eno)
  * additional information can be placed in it by higher level code.
  */
 + (NSError*) _last
+{
+#if defined(__MINGW32__)
+  return [self _systemError: GetLastError()];
+#else
+  extern int	errno;
+
+  return [self _systemError: errno];
+#endif
+}
+
++ (NSError*) _systemError: (long)code
 {
   NSError	*error;
   NSString	*domain;
   NSDictionary	*info;
-  long		code;
 #if defined(__MINGW32__)
   LPVOID	lpMsgBuf;
   NSString	*message;
 
-  code = GetLastError();
   domain = NSOSStatusErrorDomain;
   FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
     NULL, code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
@@ -949,10 +958,8 @@ strerror(int eno)
     message, NSLocalizedDescriptionKey,
     nil];
 #else
-  extern int	errno;
   NSString	*message;
 
-  code = errno;
   /* FIXME ... not all are POSIX, should we use NSMachErrorDomain for some? */
   domain = NSPOSIXErrorDomain;
   message = [NSString stringWithCString: strerror(code)

Source/GSFileHandle.m

@@ -2024,17 +2024,27 @@ NSString * const GSSOCKSRecvAddr = @"GSSOCKSRecvAddr";
   if (operation == GSFileHandleConnectCompletionNotification
     || operation == GSSOCKSConnect)
     { // Connection attempt completed.
+      extern int errno;
       int	result;
+      int	rval;
       unsigned	len = sizeof(result);
 
-      if (getsockopt(descriptor, SOL_SOCKET, SO_ERROR,
-        (char*)&result, &len) == 0 && result != 0)
+      rval = getsockopt(descriptor, SOL_SOCKET, SO_ERROR, (char*)&result, &len);
+      if (rval != 0)
         {
           NSString	*s;
 
           s = [NSString stringWithFormat: @"Connect attempt failed - %@",
 	    [NSError _last]];
           [info setObject: s forKey: GSFileHandleNotificationError];
+	}
+      else if (result != 0)
+        {
+          NSString	*s;
+
+          s = [NSString stringWithFormat: @"Connect attempt failed - %@",
+	    result, [NSError _systemError: result]];
+          [info setObject: s forKey: GSFileHandleNotificationError];
         }
       else
         {

Source/GSPrivate.h

@@ -246,6 +246,7 @@ typedef enum {
  */
 @interface	NSError (GSCategories)
 + (NSError*) _last;
++ (NSError*) _systemError: (long)number;
 @end
 
 /* Used by NSException uncaught exception handler - must not call any

Source/win32/GSFileHandleWin32.m

@@ -2039,16 +2039,26 @@ NSString * const GSSOCKSRecvAddr = @"GSSOCKSRecvAddr";
     || operation == GSSOCKSConnect)
     { // Connection attempt completed.
       int	result;
+      int	rval;
       unsigned	len = sizeof(result);
 
-      if (getsockopt((SOCKET)_get_osfhandle(descriptor), SOL_SOCKET, SO_ERROR,
-        (char*)&result, &len) == 0 && result != 0)
+      rval = getsockopt((SOCKET)_get_osfhandle(descriptor), SOL_SOCKET,
+        SO_ERROR, (char*)&result, &len);
+      if (rval != 0)
         {
           NSString	*s;
 
           s = [NSString stringWithFormat: @"Connect attempt failed - %@",
 	    [NSError _last]];
           [info setObject: s forKey: GSFileHandleNotificationError];
+	}
+      else if (result != 0)
+        {
+          NSString	*s;
+
+          s = [NSString stringWithFormat: @"Connect attempt failed - %@",
+	    [NSError _systemError: result]];
+          [info setObject: s forKey: GSFileHandleNotificationError];
         }
       else
         {