michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsNetworkLinkService.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsIObserverService.h"
michael@0: #include "nsServiceManagerUtils.h"
michael@0: #include "nsString.h"
michael@0: #include "nsCRT.h"
michael@0: 
michael@0: #import <Cocoa/Cocoa.h>
michael@0: #import <netinet/in.h>
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsNetworkLinkService,
michael@0:                   nsINetworkLinkService,
michael@0:                   nsIObserver)
michael@0: 
michael@0: nsNetworkLinkService::nsNetworkLinkService()
michael@0:     : mLinkUp(true)
michael@0:     , mStatusKnown(false)
michael@0:     , mReachability(NULL)
michael@0:     , mCFRunLoop(NULL)
michael@0: {
michael@0: }
michael@0: 
michael@0: nsNetworkLinkService::~nsNetworkLinkService()
michael@0: {
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsNetworkLinkService::GetIsLinkUp(bool *aIsUp)
michael@0: {
michael@0:     *aIsUp = mLinkUp;
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsNetworkLinkService::GetLinkStatusKnown(bool *aIsUp)
michael@0: {
michael@0:     *aIsUp = mStatusKnown;
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsNetworkLinkService::GetLinkType(uint32_t *aLinkType)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aLinkType);
michael@0: 
michael@0:   // XXX This function has not yet been implemented for this platform
michael@0:   *aLinkType = nsINetworkLinkService::LINK_TYPE_UNKNOWN;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsNetworkLinkService::Observe(nsISupports *subject,
michael@0:                               const char *topic,
michael@0:                               const char16_t *data)
michael@0: {
michael@0:     if (!strcmp(topic, "xpcom-shutdown")) {
michael@0:         Shutdown();
michael@0:     }
michael@0: 
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsNetworkLinkService::Init(void)
michael@0: {
michael@0:     nsresult rv;
michael@0: 
michael@0:     nsCOMPtr<nsIObserverService> observerService =
michael@0:         do_GetService("@mozilla.org/observer-service;1", &rv);
michael@0:     NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:     rv = observerService->AddObserver(this, "xpcom-shutdown", false);
michael@0:     NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:     // If the network reachability API can reach 0.0.0.0 without
michael@0:     // requiring a connection, there is a network interface available.
michael@0:     struct sockaddr_in addr;
michael@0:     bzero(&addr, sizeof(addr));
michael@0:     addr.sin_len = sizeof(addr);
michael@0:     addr.sin_family = AF_INET;
michael@0:     mReachability =
michael@0:         ::SCNetworkReachabilityCreateWithAddress(NULL,
michael@0:                                                  (struct sockaddr *)&addr);
michael@0:     if (!mReachability) {
michael@0:         return NS_ERROR_NOT_AVAILABLE;
michael@0:     }
michael@0: 
michael@0:     SCNetworkReachabilityContext context = {0, this, NULL, NULL, NULL};
michael@0:     if (!::SCNetworkReachabilitySetCallback(mReachability,
michael@0:                                             ReachabilityChanged,
michael@0:                                             &context)) {
michael@0:         NS_WARNING("SCNetworkReachabilitySetCallback failed.");
michael@0:         ::CFRelease(mReachability);
michael@0:         mReachability = NULL;
michael@0:         return NS_ERROR_NOT_AVAILABLE;
michael@0:     }
michael@0: 
michael@0:     // Get the current run loop.  This service is initialized at startup,
michael@0:     // so we shouldn't run in to any problems with modal dialog run loops.
michael@0:     mCFRunLoop = [[NSRunLoop currentRunLoop] getCFRunLoop];
michael@0:     if (!mCFRunLoop) {
michael@0:         NS_WARNING("Could not get current run loop.");
michael@0:         ::CFRelease(mReachability);
michael@0:         mReachability = NULL;
michael@0:         return NS_ERROR_NOT_AVAILABLE;
michael@0:     }
michael@0:     ::CFRetain(mCFRunLoop);
michael@0: 
michael@0:     if (!::SCNetworkReachabilityScheduleWithRunLoop(mReachability, mCFRunLoop,
michael@0:                                                     kCFRunLoopDefaultMode)) {
michael@0:         NS_WARNING("SCNetworkReachabilityScheduleWIthRunLoop failed.");
michael@0:         ::CFRelease(mReachability);
michael@0:         mReachability = NULL;
michael@0:         ::CFRelease(mCFRunLoop);
michael@0:         mCFRunLoop = NULL;
michael@0:         return NS_ERROR_NOT_AVAILABLE;
michael@0:     }
michael@0: 
michael@0:     UpdateReachability();
michael@0: 
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsNetworkLinkService::Shutdown()
michael@0: {
michael@0:     if (!::SCNetworkReachabilityUnscheduleFromRunLoop(mReachability,
michael@0:                                                       mCFRunLoop,
michael@0:                                                       kCFRunLoopDefaultMode)) {
michael@0:         NS_WARNING("SCNetworkReachabilityUnscheduleFromRunLoop failed.");
michael@0:     }
michael@0: 
michael@0:     ::CFRelease(mReachability);
michael@0:     mReachability = NULL;
michael@0: 
michael@0:     ::CFRelease(mCFRunLoop);
michael@0:     mCFRunLoop = NULL;
michael@0: 
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsNetworkLinkService::UpdateReachability()
michael@0: {
michael@0:     if (!mReachability) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     SCNetworkConnectionFlags flags;
michael@0:     if (!::SCNetworkReachabilityGetFlags(mReachability, &flags)) {
michael@0:         mStatusKnown = false;
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     bool reachable = (flags & kSCNetworkFlagsReachable) != 0;
michael@0:     bool needsConnection = (flags & kSCNetworkFlagsConnectionRequired) != 0;
michael@0: 
michael@0:     mLinkUp = (reachable && !needsConnection);
michael@0:     mStatusKnown = true;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsNetworkLinkService::SendEvent()
michael@0: {
michael@0:     nsCOMPtr<nsIObserverService> observerService =
michael@0:         do_GetService("@mozilla.org/observer-service;1");
michael@0:     if (!observerService)
michael@0:         return;
michael@0: 
michael@0:     const char *event;
michael@0:     if (!mStatusKnown)
michael@0:         event = NS_NETWORK_LINK_DATA_UNKNOWN;
michael@0:     else
michael@0:         event = mLinkUp ? NS_NETWORK_LINK_DATA_UP
michael@0:                         : NS_NETWORK_LINK_DATA_DOWN;
michael@0: 
michael@0:     observerService->NotifyObservers(static_cast<nsINetworkLinkService*>(this),
michael@0:                                      NS_NETWORK_LINK_TOPIC,
michael@0:                                      NS_ConvertASCIItoUTF16(event).get());
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: void
michael@0: nsNetworkLinkService::ReachabilityChanged(SCNetworkReachabilityRef target,
michael@0:                                           SCNetworkConnectionFlags flags,
michael@0:                                           void *info)
michael@0: {
michael@0:     nsNetworkLinkService *service =
michael@0:         static_cast<nsNetworkLinkService*>(info);
michael@0: 
michael@0:     service->UpdateReachability();
michael@0:     service->SendEvent();
michael@0: }