NetworkMonitor::NetworkMonitor(boost::asio::io_service& io)
: m_impl(new Impl(io))
{
m_impl->scheduleCfLoop();
// Potentially useful System Configuration regex patterns:
//
// State:/Network/Interface/.*/Link
// State:/Network/Interface/.*/IPv4
// State:/Network/Interface/.*/IPv6
//
// State:/Network/Global/DNS
// State:/Network/Global/IPv4
//
// Potentially useful notifications from Darwin Notify Center:
//
// com.apple.system.config.network_change
// network change observations
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
static_cast<void*>(this),
&NetworkMonitor::Impl::afterNotificationCenterEvent,
CFSTR("com.apple.system.config.network_change"),
nullptr, // object to observe
CFNotificationSuspensionBehaviorDeliverImmediately);
}
void CACFDistributedNotification::RemoveObserver(const void* inObserver, CFStringRef inName)
{
#if !TARGET_OS_IPHONE
CFNotificationCenterRef theCenter = CFNotificationCenterGetDistributedCenter();
#else
CFNotificationCenterRef theCenter = CFNotificationCenterGetDarwinNotifyCenter();
#endif
CFNotificationCenterRemoveObserver(theCenter, inObserver, inName, NULL);
}
void CACFDistributedNotification::AddObserver(const void* inObserver, CFNotificationCallback inCallback, CFStringRef inName, CFNotificationSuspensionBehavior inSuspensionBehavior)
{
#if !TARGET_OS_IPHONE
CFNotificationCenterRef theCenter = CFNotificationCenterGetDistributedCenter();
CFNotificationSuspensionBehavior theSuspensionBehavior = inSuspensionBehavior;
#else
#pragma unused(inSuspensionBehavior)
CFNotificationCenterRef theCenter = CFNotificationCenterGetDarwinNotifyCenter();
CFNotificationSuspensionBehavior theSuspensionBehavior = 0;
#endif
CFNotificationCenterAddObserver(theCenter, inObserver, inCallback, inName, NULL, theSuspensionBehavior);
}
void shm_post_update(nmeaINFO* nmeaInfo, const char *buff, int buff_sz)
{
shm_append_ringbuf(buff, buff_sz);
const int bestRatingResetTimeout = 3;
static int lastSeenBestRatedSentence = 0;
int currentRating = smask_rating(nmeaInfo->smask);
static nmeaTIME lastTimestamp;
// only do this for position sentences because
// sentences without embedded UTC get local device time
// which will vary with each sentence
if (currentRating > 0 &&
0 != memcmp(&lastTimestamp, &nmeaInfo->utc, sizeof(nmeaTIME))) {
lastTimestamp = nmeaInfo->utc;
++lastSeenBestRatedSentence;
#ifdef DEBUG
LogMsg("shm_post_update DEBUG: incrementing lastSeenBestRatedSentence to %u, current rating %u",
lastSeenBestRatedSentence, currentRating);
#endif
}
static int bestRating = 0;
if (lastSeenBestRatedSentence > bestRatingResetTimeout) {
LogMsg("shm_post_update: resetting best rating (%u)", bestRating);
bestRating = 0;
}
if (currentRating > bestRating) {
bestRating = currentRating;
LogMsg("shm_post_update: best rating set to (%u)", bestRating);
}
// always update shared mem to make it possible to show satellite positions before fix is available
memcpy(&g_shm_info->nmeaInfo, nmeaInfo, sizeof(nmeaINFO));
if (currentRating == bestRating && lastSeenBestRatedSentence != 0) {
lastSeenBestRatedSentence = 0;
CFNotificationCenterPostNotification(CFNotificationCenterGetDarwinNotifyCenter(), BtGpsNotificationName, nil, nil, TRUE);
}
}
void CACFDistributedNotification::PostNotification(CFStringRef inName, CFDictionaryRef inUserInfo, bool inPostToAllSessions)
{
#if !TARGET_OS_IPHONE
CFNotificationCenterRef theCenter = CFNotificationCenterGetDistributedCenter();
CFDictionaryRef theUserInfo = inUserInfo;
CFOptionFlags theFlags = kCFNotificationDeliverImmediately;
if(inPostToAllSessions)
{
theFlags += kCFNotificationPostToAllSessions;
}
#else
// flag unsupported features
Assert(inUserInfo == NULL, "CACFDistributedNotification::PostNotification: distributed notifications do not support a payload");
Assert(inPostToAllSessions, "CACFDistributedNotification::PostNotification: distributed notifications do not support per-session delivery");
CFNotificationCenterRef theCenter = CFNotificationCenterGetDarwinNotifyCenter();
CFDictionaryRef theUserInfo = NULL;
CFOptionFlags theFlags = 0;
#endif
CFNotificationCenterPostNotificationWithOptions(theCenter, inName, NULL, theUserInfo, theFlags);
}
NetworkMonitor::~NetworkMonitor()
{
CFNotificationCenterRemoveEveryObserver(CFNotificationCenterGetDarwinNotifyCenter(),
static_cast<void*>(this));
}
