gecko/netwerk/system/mac/nsNetworkLinkService.mm

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dave Camp <dcamp@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsNetworkLinkService.h"
#include "nsCOMPtr.h"
#include "nsIObserverService.h"
#include "nsServiceManagerUtils.h"
#include "nsString.h"
#import <Cocoa/Cocoa.h>
#import <netinet/in.h>
NS_IMPL_ISUPPORTS2(nsNetworkLinkService,
nsINetworkLinkService,
nsIObserver)
nsNetworkLinkService::nsNetworkLinkService()
: mLinkUp(PR_TRUE)
, mStatusKnown(PR_FALSE)
, mReachability(NULL)
, mCFRunLoop(NULL)
{
}
nsNetworkLinkService::~nsNetworkLinkService()
{
}
NS_IMETHODIMP
nsNetworkLinkService::GetIsLinkUp(PRBool *aIsUp)
{
*aIsUp = mLinkUp;
return NS_OK;
}
NS_IMETHODIMP
nsNetworkLinkService::GetLinkStatusKnown(PRBool *aIsUp)
{
*aIsUp = mStatusKnown;
return NS_OK;
}
NS_IMETHODIMP
nsNetworkLinkService::Observe(nsISupports *subject,
const char *topic,
const PRUnichar *data)
{
if (!strcmp(topic, "xpcom-shutdown")) {
Shutdown();
}
return NS_OK;
}
nsresult
nsNetworkLinkService::Init(void)
{
nsresult rv;
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = observerService->AddObserver(this, "xpcom-shutdown", PR_FALSE);
NS_ENSURE_SUCCESS(rv, rv);
// If the network reachability API can reach 0.0.0.0 without
// requiring a connection, there is a network interface available.
struct sockaddr_in addr;
bzero(&addr, sizeof(addr));
addr.sin_len = sizeof(addr);
addr.sin_family = AF_INET;
mReachability =
::SCNetworkReachabilityCreateWithAddress(NULL,
(struct sockaddr *)&addr);
if (!mReachability) {
return NS_ERROR_NOT_AVAILABLE;
}
SCNetworkReachabilityContext context = {0, this, NULL, NULL, NULL};
if (!::SCNetworkReachabilitySetCallback(mReachability,
ReachabilityChanged,
&context)) {
NS_WARNING("SCNetworkReachabilitySetCallback failed.");
::CFRelease(mReachability);
mReachability = NULL;
return NS_ERROR_NOT_AVAILABLE;
}
// Get the current run loop. This service is initialized at startup,
// so we shouldn't run in to any problems with modal dialog run loops.
mCFRunLoop = [[NSRunLoop currentRunLoop] getCFRunLoop];
if (!mCFRunLoop) {
NS_WARNING("Could not get current run loop.");
::CFRelease(mReachability);
mReachability = NULL;
return NS_ERROR_NOT_AVAILABLE;
}
::CFRetain(mCFRunLoop);
if (!::SCNetworkReachabilityScheduleWithRunLoop(mReachability, mCFRunLoop,
kCFRunLoopDefaultMode)) {
NS_WARNING("SCNetworkReachabilityScheduleWIthRunLoop failed.");
::CFRelease(mReachability);
mReachability = NULL;
::CFRelease(mCFRunLoop);
mCFRunLoop = NULL;
return NS_ERROR_NOT_AVAILABLE;
}
UpdateReachability();
return NS_OK;
}
nsresult
nsNetworkLinkService::Shutdown()
{
if (!::SCNetworkReachabilityUnscheduleFromRunLoop(mReachability,
mCFRunLoop,
kCFRunLoopDefaultMode)) {
NS_WARNING("SCNetworkReachabilityUnscheduleFromRunLoop failed.");
}
::CFRelease(mReachability);
mReachability = NULL;
::CFRelease(mCFRunLoop);
mCFRunLoop = NULL;
return NS_OK;
}
void
nsNetworkLinkService::UpdateReachability()
{
if (!mReachability) {
return;
}
SCNetworkConnectionFlags flags;
if (!::SCNetworkReachabilityGetFlags(mReachability, &flags)) {
mStatusKnown = PR_FALSE;
return;
}
PRBool reachable = (flags & kSCNetworkFlagsReachable) != 0;
PRBool needsConnection = (flags & kSCNetworkFlagsConnectionRequired) != 0;
mLinkUp = (reachable && !needsConnection);
mStatusKnown = PR_TRUE;
}
void
nsNetworkLinkService::SendEvent()
{
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1");
if (!observerService)
return;
const char *event;
if (!mStatusKnown)
event = NS_NETWORK_LINK_DATA_UNKNOWN;
else
event = mLinkUp ? NS_NETWORK_LINK_DATA_UP
: NS_NETWORK_LINK_DATA_DOWN;
observerService->NotifyObservers(static_cast<nsINetworkLinkService*>(this),
NS_NETWORK_LINK_TOPIC,
NS_ConvertASCIItoUTF16(event).get());
}
/* static */
void
nsNetworkLinkService::ReachabilityChanged(SCNetworkReachabilityRef target,
SCNetworkConnectionFlags flags,
void *info)
{
nsNetworkLinkService *service =
static_cast<nsNetworkLinkService*>(info);
service->UpdateReachability();
service->SendEvent();
}