internal void OnSessionDelete(NetworkInterfaceHandler interfaceHandler, Origin origin)
{
lock (_sessionData)
{
SdpSession session = new SdpSession(origin, interfaceHandler.NetworkInterface);
SessionData sessionData = null;
SessionAnnouncement sessionAnnouncement = null;
if (_sessionData.TryGetValue(session, out sessionData))
{
sessionAnnouncement = sessionData.Session;
}
if (sessionData != null)
{
if (origin.IsUpdateOrEqual(sessionAnnouncement.SessionDescription.Origin))
{
sessionData.Timer.Dispose();
_sessionData.Remove(session);
_announcements.Remove(sessionData.Id);
SynchronizationContextPost(o =>
{
lock (Sessions)
{
Sessions.Remove(sessionData.Session);
}
});
}
}
}
}
private void CheckNetworkInterfaceStatuses(object sender, EventArgs e)
{
lock (_interfaceHandlers)
{
HashSet <NetworkInterfaceHandler> handlers = new HashSet <NetworkInterfaceHandler>(_interfaceHandlers.Values);
NetworkInterfaceInformation[] interfaceInfos = NetworkInterfaceInformation.GetAllNetworkInterfaces();
foreach (NetworkInterfaceInformation interfaceInfo in interfaceInfos)
{
if (interfaceInfo.NetworkInterfaceType == NetworkInterfaceType.Loopback)
{
continue;
}
if (interfaceInfo.NetworkInterfaceType == NetworkInterfaceType.Tunnel)
{
continue;
}
int index = interfaceInfo.GetIPProperties().GetIPv4Properties().Index;
NetworkInterfaceHandler interfaceHandler;
_interfaceHandlers.TryGetValue(index, out interfaceHandler);
if (interfaceHandler == null)
{
var networkInterface = new NetworkInterface(interfaceInfo);
index = interfaceInfo.GetIPProperties().GetIPv4Properties().Index;
interfaceHandler = new NetworkInterfaceHandler(this, networkInterface);
_interfaceHandlers.Add(index, interfaceHandler);
}
if (interfaceInfo.OperationalStatus == OperationalStatus.Up)
{
interfaceHandler.Enable();
}
else
{
interfaceHandler.Disable();
}
handlers.Remove(interfaceHandler);
}
foreach (NetworkInterfaceHandler handler in handlers)
{
handler.Disable();
}
}
}
internal void OnInterfaceDisable(NetworkInterfaceHandler networkInterfaceHandler)
{
lock (_sessionData)
{
var removedSessions = _sessionData.Where(s => s.Key.NetworkInterface == networkInterfaceHandler.NetworkInterface).ToList();
foreach (var pair in removedSessions)
{
SdpSession session = pair.Key;
SessionData sessionData = pair.Value;
sessionData.Timer.Dispose();
_sessionData.Remove(session);
_announcements.Remove(sessionData.Id);
SynchronizationContextPost(o =>
{
lock (Sessions)
{
Sessions.Remove(sessionData.Session);
}
});
}
}
}
internal void OnSessionAnnounce(NetworkInterfaceHandler interfaceHandler, Announcement announcement)
{
lock (_sessionData)
{
AnnouncementIdentifier id = new AnnouncementIdentifier(interfaceHandler.NetworkInterface, announcement);
SessionData sessionData = null;
bool knownAnnouncement = _announcements.TryGetValue(id, out sessionData);
if (!knownAnnouncement)
{
announcement.Decompress();
Stream stream = new MemoryStream(announcement.Payload.Array, announcement.Payload.Offset, announcement.Payload.Count);
SessionDescription description = SessionDescription.Load(stream);
description.SetReadOnly();
SdpSession session = new SdpSession(description, interfaceHandler.NetworkInterface);
SessionAnnouncement sessionAnnouncement = null;
if (_sessionData.TryGetValue(session, out sessionData))
{
sessionAnnouncement = sessionData.Session;
}
if (sessionData != null)
{
if (description.IsUpdateOf(sessionAnnouncement.SessionDescription))
{
sessionAnnouncement = new SessionAnnouncement(description, interfaceHandler.NetworkInterface);
SessionAnnouncement oldAnnouncement = sessionData.Session;
sessionData.Session = sessionAnnouncement;
_announcements.Remove(sessionData.Id);
sessionData.Id = id;
SynchronizationContextPost(o =>
{
lock (Sessions)
{
Sessions.Replace(oldAnnouncement, sessionAnnouncement);
}
});
}
}
else
{
sessionAnnouncement = new SessionAnnouncement(description, interfaceHandler.NetworkInterface);
sessionData = new SessionData()
{
Session = sessionAnnouncement,
Timer = new Timer(OnTimeOut, session, System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite),
Id = id
};
_sessionData.Add(session, sessionData);
_announcements.Add(id, sessionData);
SynchronizationContextPost(o =>
{
lock (Sessions)
{
Sessions.Add(sessionAnnouncement);
}
});
}
}
sessionData.TimeOutTime = DateTime.Now + DefaultTimeOut;
sessionData.Timer.Change(DefaultTimeOut, TimeSpan.FromMilliseconds(-1));
}
}