Support outgoing connections bound to a specific local address.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@18953 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -10,6 +10,15 @@
 	contigure.ac:
 	Add --enable-xslt option to require stylesheet support (in case we want
 	to start uisng it to generate documentation)
+	* Headers/Foundation/NSURLHandle.h:
+	* Source/GSFileHandle.m:
+	* Source/GSHTTPURLHandle.m:
+	* Source/NSFileHandle.m:
+	* Source/NSURLHandle.m:
+	Support binding to specific local ip address for outgoing connections
+	in gnustep extensions.
+	* Source/GSMime.m: ([-setContent:]), ([-addContent:]) Check that
+	content of a multipart document consists of GSMimeDocument objects.
 
 2004-03-29 Adrian Robert <arobert@cogsci.ucsd.edu>
 

Headers/Foundation/NSURLHandle.h

@@ -42,6 +42,7 @@ GS_EXPORT NSString * const NSHTTPPropertyRedirectionHeadersKey;
 GS_EXPORT NSString * const NSHTTPPropertyErrorPageDataKey;
 
 #ifndef	NO_GNUSTEP
+GS_EXPORT NSString * const GSHTTPPropertyLocalHostKey;
 GS_EXPORT NSString * const GSHTTPPropertyMethodKey;
 GS_EXPORT NSString * const GSHTTPPropertyProxyHostKey;
 GS_EXPORT NSString * const GSHTTPPropertyProxyPortKey;

Source/Additions/GSMime.m

@@ -3317,6 +3317,11 @@ static NSCharacterSet	*tokenSet = nil;
  */
 - (void) addContent: (id)newContent
 {
+  if ([newContent isKindOfClass: [GSMimeDocument class]] == NO)
+    {
+      [NSException raise: NSInvalidArgumentException
+		  format: @"Content to add is not a GSMimeDocument"];
+    }
   if (content == nil)
     {
       content = [NSMutableArray new];
@@ -4469,6 +4474,18 @@ static NSCharacterSet	*tokenSet = nil;
     {
       if (newContent != content)
 	{
+	  unsigned	c = [newContent count];
+
+	  while (c-- > 0)
+	    {
+	      id	o = [newContent objectAtIndex: c];
+
+	      if ([o isKindOfClass: [GSMimeDocument class]] == NO)
+		{
+		  [NSException raise: NSInvalidArgumentException
+			      format: @"Content contains non-GSMimeDocument"];
+		}
+	    }
 	  newContent = [newContent mutableCopy];
 	  ASSIGN(content, newContent);
 	  RELEASE(newContent);

Source/GSFileHandle.m

@@ -685,6 +685,8 @@ NSString * const GSSOCKSRecvAddr = @"GSSOCKSRecvAddr";
   static BOOL		beenHere = NO;
   SOCKET		net;
   struct sockaddr_in	sin;
+  struct sockaddr_in	lsin;
+  NSString		*lhost = nil;
   NSString		*shost = nil;
   NSString		*sport = nil;
 
@@ -720,6 +722,30 @@ NSString * const GSSOCKSRecvAddr = @"GSSOCKSRecvAddr";
       return nil;
     }
 
+  if ([p hasPrefix: @"bind-"] == YES)
+    {
+      NSRange	r;
+
+      lhost = [p substringFromIndex: 5];
+      r = [lhost rangeOfString: @":"];
+      if (r.length > 0)
+	{
+	  p = [lhost substringFromIndex: NSMaxRange(r)];
+	  lhost = [lhost substringToIndex: r.location];
+	}
+      else
+	{
+	  p = nil;
+	}
+      if (getAddr(lhost, p, @"tcp", &lsin) == NO)
+	{
+	  NSLog(@"bad bind address specification");
+	  RELEASE(self);
+	  return nil;
+	}
+      p = @"tcp";
+    }
+
   /**
    * A protocol fo the form 'socks-...' controls socks operation,
    * overriding defaults and environment variables.<br />
@@ -795,6 +821,21 @@ NSString * const GSSOCKSRecvAddr = @"GSSOCKSRecvAddr";
       RELEASE(self);
       return nil;
     }
+  if (lhost != nil)
+    {
+      if (bind(net, (struct sockaddr *)&lsin, sizeof(lsin)) == SOCKET_ERROR)
+	{
+	  NSLog(@"unable to bind to port %s:%d - %s", inet_ntoa(lsin.sin_addr),
+	    GSSwapBigI16ToHost(sin.sin_port), GSLastErrorStr(errno));
+#if defined(__MINGW__)
+	  (void) closesocket(net);
+#else
+	  (void) close(net);
+#endif
+	  RELEASE(self);
+	  return nil;
+	}
+    }
 
 #if defined(__MINGW__)
   self = [self initWithNativeHandle: (void*)net closeOnDealloc: YES];

Source/GSHTTPURLHandle.m

@@ -161,6 +161,12 @@ char emp[64] = {
  *   secure connection when a proxy is specified, GSHTTPURLHandle will
  *   attempt to open an SSL Tunnel through the proxy.
  * </p>
+ * <p>
+ *   Requests to the remote server may be forced to be bound to a
+ *   particular local IP address by using the key
+ *   &quot;GSHTTPPropertyLocalHostKey&quot;  which must contain the
+ *   IP address of a network interface on the local host.
+ * </p>
  */
 @implementation GSHTTPURLHandle
 
@@ -450,6 +456,7 @@ static void debugWrite(NSData *data)
   NSNotificationCenter	*nc;
   NSString		*host = nil;
   NSString		*port = nil;
+  NSString		*s;
 
   /*
    * Don't start a load if one is in progress.
@@ -471,6 +478,20 @@ static void debugWrite(NSData *data)
       [sock closeFile];
       DESTROY(sock);
     }
+
+  /*
+   * If we have a local address specified, tell the file handle to bind to it.
+   */
+  s = [request objectForKey: GSHTTPPropertyLocalHostKey];
+  if ([s length] > 0)
+    {
+      s = [NSString stringWithFormat: @"bind-%@", s];
+    }
+  else
+    {
+      s = @"tcp";	// Bind to any.
+    }
+
   if ([[request objectForKey: GSHTTPPropertyProxyHostKey] length] == 0)
     {
       NSNumber	*p;
@@ -493,17 +514,15 @@ static void debugWrite(NSData *data)
 		@"https not supported ... needs SSL bundle"];
 	      return;
 	    }
-	  sock = [sslClass
-	    fileHandleAsClientInBackgroundAtAddress: host
-					    service: port
-					   protocol: @"tcp"];
+	  sock = [sslClass fileHandleAsClientInBackgroundAtAddress: host
+							   service: port
+							  protocol: s];
 	}
       else
 	{
-	  sock = [NSFileHandle 
-	    fileHandleAsClientInBackgroundAtAddress: host
-					    service: port
-					   protocol: @"tcp"];
+	  sock = [NSFileHandle fileHandleAsClientInBackgroundAtAddress: host
+							       service: port
+							      protocol: s];
 	}
     }
   else
@@ -522,19 +541,17 @@ static void debugWrite(NSData *data)
 	    }
 	  host = [request objectForKey: GSHTTPPropertyProxyHostKey];
 	  port = [request objectForKey: GSHTTPPropertyProxyPortKey];
-	  sock = [sslClass
-	    fileHandleAsClientInBackgroundAtAddress: host 
-					    service: port
-					   protocol: @"tcp"];
+	  sock = [sslClass fileHandleAsClientInBackgroundAtAddress: host 
+							   service: port
+							  protocol: s];
 	}
       else
 	{
 	  host = [request objectForKey: GSHTTPPropertyProxyHostKey];
 	  port = [request objectForKey: GSHTTPPropertyProxyPortKey];
-	  sock = [NSFileHandle 
-	    fileHandleAsClientInBackgroundAtAddress: host 
-					    service: port
-					   protocol: @"tcp"];
+	  sock = [NSFileHandle fileHandleAsClientInBackgroundAtAddress: host 
+							       service: port
+							      protocol: s];
 	}
     }
   if (sock == nil)

Source/NSFileHandle.m

@@ -428,7 +428,10 @@ NSString * const NSFileHandleOperationException
  *     is <em>not</em> made via a socks server.<br />
  *     Otherwise, the text '...' must be the name of the host on which the
  *     socks5 server is running, with an optional port number separated
- *     from the host name by a colon.
+ *     from the host name by a colon.<br />
+ *     Alternatively a prefix of the form 'bind-' forllowed by an IP address
+ *     may be used (for non-socks connections) to ensure that the connection
+ *     is made from the specified address.
  *   </item>
  *   <item>
  *     If modes is nil or empty, uses NSDefaultRunLoopMode.

Source/NSURLHandle.m

@@ -64,6 +64,9 @@ NSString * const NSHTTPPropertyErrorPageDataKey
 NSString * const GSHTTPPropertyMethodKey
   = @"GSHTTPPropertyMethodKey";
 
+NSString * const GSHTTPPropertyLocalHostKey
+  = @"GSHTTPPropertyLocalHostKey";
+
 NSString * const GSHTTPPropertyProxyHostKey
   = @"GSHTTPPropertyProxyHostKey";