Implement saving DNS server list.

This makes the preflet good enough for replacing the current one.

src/tests/kits/net/preflet/ServicesAddOn/DNSSettingsView.cpp

@@ -10,8 +10,11 @@
 #include "DNSSettingsView.h"
 
 #include <Button.h>
+#include <File.h>
+#include <FindDirectory.h>
 #include <LayoutBuilder.h>
 #include <ListView.h>
+#include <Path.h>
 #include <ScrollView.h>
 #include <TextControl.h>
 
@@ -25,6 +28,8 @@
 
 static const int32 kAddServer = 'adds';
 static const int32 kDeleteServer = 'dels';
+static const int32 kMoveUp = 'mvup';
+static const int32 kMoveDown = 'mvdn';
 static const int32 kEditServer = 'edit';
 
 
@@ -35,8 +40,8 @@ DNSSettingsView::DNSSettingsView()
 	fTextControl->SetModificationMessage(new BMessage(kEditServer));
 	
 	fAddButton = new BButton("Add", new BMessage(kAddServer));
-	fUpButton = new BButton("Move up", NULL);
-	fDownButton = new BButton("Move down", NULL);
+	fUpButton = new BButton("Move up", new BMessage(kMoveUp));
+	fDownButton = new BButton("Move down", new BMessage(kMoveDown));
 	fRemoveButton = new BButton("Remove", new BMessage(kDeleteServer));
 
 	BLayoutBuilder::Group<>(this)
@@ -51,7 +56,7 @@ DNSSettingsView::DNSSettingsView()
 		.End()
 	.End();
 
-	_ParseResolvConf();
+	_LoadDNSConfiguration();
 }
 
 
@@ -79,7 +84,25 @@ DNSSettingsView::MessageReceived(BMessage* message)
 		}
 		case kDeleteServer:
 		{
-			fServerListView->RemoveItem(fServerListView->CurrentSelection());
+			delete fServerListView->RemoveItem(
+				fServerListView->CurrentSelection());
+			break;
+		}
+		case kMoveUp:
+		{
+			int index = fServerListView->CurrentSelection();
+
+			if (index > 0)
+				fServerListView->SwapItems(index, index - 1);
+			break;
+		}
+		case kMoveDown:
+		{
+			int index = fServerListView->CurrentSelection();
+
+			if (index < fServerListView->CountItems() - 1)
+				fServerListView->SwapItems(index, index + 1);
+			break;
 		}
 		case kEditServer:
 		{
@@ -87,6 +110,7 @@ DNSSettingsView::MessageReceived(BMessage* message)
 			bool success = inet_aton(fTextControl->Text(), &dummy);
 			fTextControl->MarkAsInvalid(!success);
 			fAddButton->SetEnabled(success);
+			break;
 		}
 		default:
 			BGroupView::MessageReceived(message);
@@ -95,18 +119,88 @@ DNSSettingsView::MessageReceived(BMessage* message)
 
 
 status_t
-DNSSettingsView::_ParseResolvConf()
+DNSSettingsView::Apply()
+{
+	return _SaveDNSConfiguration();
+}
+
+
+status_t
+DNSSettingsView::Revert()
+{
+	int i;
+	for(i = 0; i < fRevertList.CountStrings(); i++) {
+		BStringItem* item = static_cast<BStringItem*>(fServerListView->ItemAt(i));
+		if (item == NULL) {
+			item = new BStringItem("");
+			fServerListView->AddItem(item);
+		}
+
+		item->SetText(fRevertList.StringAt(i));
+	}
+
+	// Now remove any extra item
+	for(; i < fServerListView->CountItems(); i++)
+		delete fServerListView->RemoveItem(i);
+
+	return B_OK;
+}
+
+
+status_t
+DNSSettingsView::_LoadDNSConfiguration()
 {
 	res_init();
 	res_state state = __res_state();
 
 	if (state != NULL) {
 		for (int i = 0; i < state->nscount; i++) {
-			fServerListView->AddItem(
-				new BStringItem(inet_ntoa(state->nsaddr_list[i].sin_addr)));
+			char* address = inet_ntoa(state->nsaddr_list[i].sin_addr);
+			fServerListView->AddItem(new BStringItem(address));
+			fRevertList.Add(address);
 		}
 		return B_OK;
 	}
 
 	return B_ERROR;
 }
+
+
+status_t
+DNSSettingsView::_SaveDNSConfiguration()
+{
+	BPath path;
+	status_t status;
+	status = find_directory(B_SYSTEM_SETTINGS_DIRECTORY, &path);
+	if (status != B_OK)
+		return status;
+
+	path.Append("network/resolv.conf");
+
+	BFile file(path.Path(), B_CREATE_FILE | B_ERASE_FILE | B_WRITE_ONLY);
+	if (file.InitCheck() != B_OK) {
+		fprintf(stderr, "failed to open %s for writing: %s\n", path.Path(),
+			strerror(file.InitCheck()));
+		return file.InitCheck();
+	}
+
+	BString content("# Generated by Network Preflet\n");
+
+	for (int j = 0; j < fServerListView->CountItems(); j++) {
+		BString item = ((BStringItem*)fServerListView->ItemAt(j))->Text();
+		if (item.Length() > 0) {
+			content << "nameserver\t" << item.String() << "\n";
+		}
+	}
+#if 0
+	if (strlen(settings->Domain()) > 0) {
+		content << "domain\t"
+			<< settings->Domain()
+			<< "\n";
+	}
+#endif
+
+	return file.Write(content.String(), content.Length());
+}
+
+

src/tests/kits/net/preflet/ServicesAddOn/DNSSettingsView.h

@@ -8,6 +8,7 @@
 
 
 #include <GroupView.h>
+#include <StringList.h>
 
 
 class BButton;
@@ -22,11 +23,16 @@ public:
 		void				AttachedToWindow();
 		void				MessageReceived(BMessage* message);
 
+		status_t			Apply();
+		status_t			Revert();
+
 private:
-		status_t			_ParseResolvConf();
+		status_t			_LoadDNSConfiguration();
+		status_t			_SaveDNSConfiguration();
 
 private:
 		BListView*			fServerListView;
+		BStringList			fRevertList;
 		BTextControl*		fTextControl;
 
 		BButton*			fAddButton;

src/tests/kits/net/preflet/ServicesAddOn/ServicesAddOn.cpp

@@ -79,7 +79,7 @@ ServicesAddOn::AttachedToWindow()
 void
 ServicesAddOn::MessageReceived(BMessage* message)
 {
-	switch(message->what) {
+	switch (message->what) {
 		case kSelectionChanged:
 		{
 			BStringItem* item = static_cast<BStringItem*>(
@@ -111,6 +111,36 @@ ServicesAddOn::MessageReceived(BMessage* message)
 }
 
 
+status_t
+ServicesAddOn::Save()
+{
+	BView* panel = Window()->FindView("panel");
+	DNSSettingsView* settingsView = dynamic_cast<DNSSettingsView*>(
+		panel->ChildAt(0));
+
+	// View not active - nothing to save
+	if (settingsView == NULL)
+		return B_OK;
+
+	return settingsView->Apply();
+}
+
+
+status_t
+ServicesAddOn::Revert()
+{
+	BView* panel = Window()->FindView("panel");
+	DNSSettingsView* settingsView = dynamic_cast<DNSSettingsView*>(
+		panel->ChildAt(0));
+
+	// View not active - nothing to revert
+	if (settingsView == NULL)
+		return B_OK;
+
+	return settingsView->Revert();
+}
+
+
 status_t
 ServicesAddOn::_ParseInetd()
 {

src/tests/kits/net/preflet/ServicesAddOn/ServicesAddOn.h

@@ -23,6 +23,9 @@ class ServicesAddOn : public NetworkSetupAddOn, public BGroupView {
 		void				AttachedToWindow();
 		void				MessageReceived(BMessage*);
 
+		status_t			Save();
+		status_t			Revert();
+
 	private:
 		status_t			_ParseInetd();
 		status_t			_ParseXinetd();