networking: Hostname viewing & setting

addon/network settings/hostname

	allowing the hostname for the system to be set by the user using
	the preferences gui

Change-Id: I676c368070ef89a20435f97ee39e3caa25abf8f9
Reviewed-on: https://review.haiku-os.org/c/870
Reviewed-by: Axel Dörfler <axeld@pinc-software.de>
Reviewed-by: Stephan Aßmus <superstippi@gmx.de>

src/add-ons/network_settings/Jamfile

@@ -15,3 +15,5 @@ SubInclude HAIKU_TOP src add-ons network_settings telnetd ;
 # VPN add-ons
 SubInclude HAIKU_TOP src add-ons network_settings openvpn ;
 
+# Other add-ons
+SubInclude HAIKU_TOP src add-ons network_settings hostname ;

src/add-ons/network_settings/hostname/Hostname.rdef

@@ -0,0 +1,12 @@
+resource app_signature "application/x-vnd.Haiku-Hostname";
+
+resource app_version {
+	major  = 1,
+	middle = 0,
+	minor  = 0,
+	variety = 0,
+	internal = 0,
+	short_info = "1.0.0",
+	long_info = "Haiku Hostname settings"
+};
+

src/add-ons/network_settings/hostname/HostnameAddOn.cpp

@@ -0,0 +1,152 @@
+/*
+ * Copyright 2019 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, <axeld@pinc-software.de>
+ *		Rob Gill, <rrobgill@protonmail.com>
+ */
+
+
+#include <Catalog.h>
+#include <NetworkSettings.h>
+#include <NetworkSettingsAddOn.h>
+#include <StringItem.h>
+
+#include "HostnameView.h"
+
+
+using namespace BNetworkKit;
+
+
+#undef B_TRANSLATION_CONTEXT
+#define B_TRANSLATION_CONTEXT "HostnameAddOn"
+
+
+class HostnameAddOn : public BNetworkSettingsAddOn {
+public:
+								HostnameAddOn(image_id image,
+									BNetworkSettings& settings);
+	virtual						~HostnameAddOn();
+
+	virtual	BNetworkSettingsItem*
+								CreateNextItem(uint32& cookie);
+};
+
+
+class HostnameItem : public BNetworkSettingsItem {
+public:
+								HostnameItem(
+									BNetworkSettings& settings);
+	virtual						~HostnameItem();
+
+	virtual	BNetworkSettingsType
+								Type() const;
+
+	virtual	BListItem*			ListItem();
+	virtual	BView*				View();
+
+	virtual	status_t			Revert();
+	virtual	bool				IsRevertable();
+
+private:
+			BNetworkSettings&	fSettings;
+			BStringItem*		fItem;
+			HostnameView*		fView;
+};
+
+
+// #pragma mark -
+
+
+HostnameItem::HostnameItem(BNetworkSettings& settings)
+	:
+	fSettings(settings),
+	fItem(new BStringItem(B_TRANSLATE("Hostname settings"))),
+	fView(NULL)
+{
+}
+
+
+HostnameItem::~HostnameItem()
+{
+	if (fView->Parent() == NULL)
+		delete fView;
+
+	delete fItem;
+}
+
+
+BNetworkSettingsType
+HostnameItem::Type() const
+{
+	return B_NETWORK_SETTINGS_TYPE_OTHER;
+}
+
+
+BListItem*
+HostnameItem::ListItem()
+{
+	return fItem;
+}
+
+
+BView*
+HostnameItem::View()
+{
+	if (fView == NULL)
+		fView = new HostnameView(this);
+
+	return fView;
+}
+
+
+status_t
+HostnameItem::Revert()
+{
+	return fView != NULL ? fView->Revert() : B_OK;
+}
+
+
+bool
+HostnameItem::IsRevertable()
+{
+	return fView != NULL ? fView->IsRevertable() : false;
+}
+
+
+// #pragma mark -
+
+
+HostnameAddOn::HostnameAddOn(image_id image,
+	BNetworkSettings& settings)
+	:
+	BNetworkSettingsAddOn(image, settings)
+{
+}
+
+
+HostnameAddOn::~HostnameAddOn()
+{
+}
+
+
+BNetworkSettingsItem*
+HostnameAddOn::CreateNextItem(uint32& cookie)
+{
+	if (cookie++ == 0)
+		return new HostnameItem(Settings());
+
+	return NULL;
+}
+
+
+// #pragma mark -
+
+
+extern "C"
+BNetworkSettingsAddOn*
+instantiate_network_settings_add_on(image_id image, BNetworkSettings& settings)
+{
+	return new HostnameAddOn(image, settings);
+}

src/add-ons/network_settings/hostname/HostnameView.cpp

@@ -0,0 +1,136 @@
+/*
+ * Copyright 2019 Haiku Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *      Adrien Destugues, pulkomandy@pulkomandy.tk
+ *		Rob Gill, <rrobgill@protonmail.com>
+ */
+
+
+#include "HostnameView.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <Box.h>
+#include <Button.h>
+#include <Catalog.h>
+#include <ControlLook.h>
+#include <LayoutBuilder.h>
+#include <SeparatorView.h>
+#include <StringView.h>
+
+
+static const int32 kMsgApply = 'aply';
+
+
+#undef B_TRANSLATION_CONTEXT
+#define B_TRANSLATION_CONTEXT "HostnameView"
+
+
+HostnameView::HostnameView(BNetworkSettingsItem* item)
+	:
+	BView("hostname", 0),
+	fItem(item)
+{
+	BStringView* titleView = new BStringView("title",
+		B_TRANSLATE("Hostname settings"));
+	titleView->SetFont(be_bold_font);
+	titleView->SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNSET));
+
+	fHostname = new BTextControl(B_TRANSLATE("Hostname:"), "", NULL);
+	fApplyButton = new BButton(B_TRANSLATE("Apply"), new BMessage(kMsgApply));
+
+	BLayoutBuilder::Group<>(this, B_VERTICAL)
+		.Add(titleView)
+		.Add(fHostname)
+		.AddGlue()
+		.AddGroup(B_HORIZONTAL)
+			.AddGlue()
+			.Add(fApplyButton);
+
+	_LoadHostname();
+}
+
+
+HostnameView::~HostnameView()
+{
+}
+
+status_t
+HostnameView::Revert()
+{
+	return B_OK;
+}
+
+bool
+HostnameView::IsRevertable() const
+{
+	return false;
+}
+
+
+void
+HostnameView::AttachedToWindow()
+{
+	fApplyButton->SetTarget(this);
+}
+
+
+void
+HostnameView::MessageReceived(BMessage* message)
+{
+	switch (message->what) {
+		case kMsgApply:
+			if (_SaveHostname() == B_OK)
+				fItem->NotifySettingsUpdated();
+			break;
+
+		default:
+			BView::MessageReceived(message);
+			break;
+	}
+}
+
+
+status_t
+HostnameView::_LoadHostname()
+{
+	BString fHostnameString;
+	char hostname[MAXHOSTNAMELEN];
+
+	if (gethostname(hostname, MAXHOSTNAMELEN) == 0) {
+
+		fHostnameString.SetTo(hostname, MAXHOSTNAMELEN);
+		fHostname->SetText(fHostnameString);
+
+		return B_OK;
+	} else
+
+	return B_ERROR;
+}
+
+
+status_t
+HostnameView::_SaveHostname()
+{
+	BString hostnamestring("");
+
+	size_t hostnamelen(strlen(fHostname->Text()));
+
+	if (hostnamelen == 0)
+		return B_ERROR;
+
+	if (hostnamelen > MAXHOSTNAMELEN) {
+		hostnamestring.Truncate(MAXHOSTNAMELEN);
+		hostnamelen = MAXHOSTNAMELEN;
+	}
+
+	hostnamestring << fHostname->Text();
+
+	if (sethostname(hostnamestring, hostnamelen) == 0)
+		return B_OK;
+
+	return B_ERROR;
+}

src/add-ons/network_settings/hostname/HostnameView.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2014-2019 Haiku Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Adrien Destugues, pulkomandy@pulkomandy.tk
+ *		Rob Gill, rrobgill@protonmail.com
+ */
+#ifndef HOSTNAME_VIEW_H
+#define HOSTNAME_VIEW_H
+
+
+#include <NetworkSettingsAddOn.h>
+#include <StringList.h>
+#include <View.h>
+
+
+using namespace BNetworkKit;
+
+class BButton;
+class BTextControl;
+
+
+class HostnameView : public BView {
+public:
+								HostnameView(BNetworkSettingsItem* item);
+								~HostnameView();
+
+			status_t			Revert();
+			bool				IsRevertable() const;
+
+	virtual	void				AttachedToWindow();
+	virtual	void				MessageReceived(BMessage* message);
+
+private:
+			status_t			_LoadHostname();
+			status_t			_SaveHostname();
+
+private:
+			BNetworkSettingsItem*
+								fItem;
+			BTextControl*		fHostname;
+
+			BButton*			fApplyButton;
+};
+
+
+#endif // HOSTNAME_VIEW_H

src/add-ons/network_settings/hostname/Jamfile

@@ -0,0 +1,20 @@
+SubDir HAIKU_TOP src add-ons network_settings hostname ;
+
+UsePublicHeaders [ FDirName add-ons network_settings ] ;
+UsePrivateHeaders app libroot kernel net ;
+UseHeaders [ FDirName $(HAIKU_TOP) src preferences network ] : false ;
+
+AddResources Hostname : Hostname.rdef ;
+
+Addon Hostname :
+	HostnameAddOn.cpp
+	HostnameView.cpp
+
+	: be network bnetapi <nogrist>Network [ TargetLibsupc++ ]
+		[ TargetLibstdc++ ] localestub
+;
+
+DoCatalogs Hostname : x-vnd.Haiku-Hostname :
+	HostnameAddOn.cpp
+	HostnameView.cpp
+;