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232 строки
6.9 KiB
Plaintext
232 строки
6.9 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Dave Camp <dcamp@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsNetworkLinkService.h"
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#include "nsCOMPtr.h"
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#include "nsIObserverService.h"
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#include "nsServiceManagerUtils.h"
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#include "nsString.h"
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#include "nsCRT.h"
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#import <Cocoa/Cocoa.h>
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#import <netinet/in.h>
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NS_IMPL_ISUPPORTS2(nsNetworkLinkService,
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nsINetworkLinkService,
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nsIObserver)
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nsNetworkLinkService::nsNetworkLinkService()
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: mLinkUp(true)
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, mStatusKnown(false)
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, mReachability(NULL)
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, mCFRunLoop(NULL)
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{
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}
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nsNetworkLinkService::~nsNetworkLinkService()
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{
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}
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NS_IMETHODIMP
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nsNetworkLinkService::GetIsLinkUp(bool *aIsUp)
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{
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*aIsUp = mLinkUp;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNetworkLinkService::GetLinkStatusKnown(bool *aIsUp)
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{
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*aIsUp = mStatusKnown;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNetworkLinkService::GetLinkType(PRUint32 *aLinkType)
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{
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NS_ENSURE_ARG_POINTER(aLinkType);
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// XXX This function has not yet been implemented for this platform
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*aLinkType = nsINetworkLinkService::LINK_TYPE_UNKNOWN;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNetworkLinkService::Observe(nsISupports *subject,
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const char *topic,
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const PRUnichar *data)
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{
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if (!strcmp(topic, "xpcom-shutdown")) {
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Shutdown();
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}
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return NS_OK;
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}
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nsresult
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nsNetworkLinkService::Init(void)
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{
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nsresult rv;
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nsCOMPtr<nsIObserverService> observerService =
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do_GetService("@mozilla.org/observer-service;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = observerService->AddObserver(this, "xpcom-shutdown", false);
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NS_ENSURE_SUCCESS(rv, rv);
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// If the network reachability API can reach 0.0.0.0 without
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// requiring a connection, there is a network interface available.
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struct sockaddr_in addr;
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bzero(&addr, sizeof(addr));
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addr.sin_len = sizeof(addr);
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addr.sin_family = AF_INET;
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mReachability =
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::SCNetworkReachabilityCreateWithAddress(NULL,
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(struct sockaddr *)&addr);
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if (!mReachability) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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SCNetworkReachabilityContext context = {0, this, NULL, NULL, NULL};
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if (!::SCNetworkReachabilitySetCallback(mReachability,
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ReachabilityChanged,
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&context)) {
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NS_WARNING("SCNetworkReachabilitySetCallback failed.");
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::CFRelease(mReachability);
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mReachability = NULL;
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return NS_ERROR_NOT_AVAILABLE;
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}
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// Get the current run loop. This service is initialized at startup,
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// so we shouldn't run in to any problems with modal dialog run loops.
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mCFRunLoop = [[NSRunLoop currentRunLoop] getCFRunLoop];
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if (!mCFRunLoop) {
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NS_WARNING("Could not get current run loop.");
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::CFRelease(mReachability);
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mReachability = NULL;
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return NS_ERROR_NOT_AVAILABLE;
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}
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::CFRetain(mCFRunLoop);
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if (!::SCNetworkReachabilityScheduleWithRunLoop(mReachability, mCFRunLoop,
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kCFRunLoopDefaultMode)) {
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NS_WARNING("SCNetworkReachabilityScheduleWIthRunLoop failed.");
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::CFRelease(mReachability);
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mReachability = NULL;
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::CFRelease(mCFRunLoop);
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mCFRunLoop = NULL;
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return NS_ERROR_NOT_AVAILABLE;
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}
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UpdateReachability();
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return NS_OK;
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}
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nsresult
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nsNetworkLinkService::Shutdown()
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{
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if (!::SCNetworkReachabilityUnscheduleFromRunLoop(mReachability,
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mCFRunLoop,
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kCFRunLoopDefaultMode)) {
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NS_WARNING("SCNetworkReachabilityUnscheduleFromRunLoop failed.");
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}
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::CFRelease(mReachability);
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mReachability = NULL;
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::CFRelease(mCFRunLoop);
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mCFRunLoop = NULL;
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return NS_OK;
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}
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void
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nsNetworkLinkService::UpdateReachability()
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{
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if (!mReachability) {
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return;
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}
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SCNetworkConnectionFlags flags;
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if (!::SCNetworkReachabilityGetFlags(mReachability, &flags)) {
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mStatusKnown = false;
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return;
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}
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bool reachable = (flags & kSCNetworkFlagsReachable) != 0;
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bool needsConnection = (flags & kSCNetworkFlagsConnectionRequired) != 0;
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mLinkUp = (reachable && !needsConnection);
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mStatusKnown = true;
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}
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void
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nsNetworkLinkService::SendEvent()
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{
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nsCOMPtr<nsIObserverService> observerService =
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do_GetService("@mozilla.org/observer-service;1");
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if (!observerService)
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return;
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const char *event;
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if (!mStatusKnown)
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event = NS_NETWORK_LINK_DATA_UNKNOWN;
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else
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event = mLinkUp ? NS_NETWORK_LINK_DATA_UP
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: NS_NETWORK_LINK_DATA_DOWN;
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observerService->NotifyObservers(static_cast<nsINetworkLinkService*>(this),
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NS_NETWORK_LINK_TOPIC,
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NS_ConvertASCIItoUTF16(event).get());
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}
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/* static */
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void
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nsNetworkLinkService::ReachabilityChanged(SCNetworkReachabilityRef target,
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SCNetworkConnectionFlags flags,
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void *info)
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{
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nsNetworkLinkService *service =
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static_cast<nsNetworkLinkService*>(info);
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service->UpdateReachability();
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service->SendEvent();
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}
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