protected void HandleNotifyPacket(EndpointConfiguration config, IPEndPoint remoteEndPoint, HTTPVersion httpVersion,
string date, string cacheControl, string location, string server, string nts, string usn, string bi, string ci, string sp)
{
uint bootID = 0;
if (bi != null && !uint.TryParse(bi, out bootID))
{
// Invalid message
return;
}
uint configID = 0;
if (ci != null && !uint.TryParse(ci, out configID))
{
// Invalid message
return;
}
if (!usn.StartsWith("uuid:"))
{
// Invalid usn
return;
}
string deviceUUID;
string messageType;
if (!ParserHelper.TryParseUSN(usn, out deviceUUID, out messageType))
{
// We only use messages of the type "uuid:device-UUID::..." and discard the "uuid:device-UUID" message
return;
}
if (nts == "ssdp:alive")
{
if (server == null)
{
// Invalid message
return;
}
int maxAge;
if (!TryParseMaxAge(cacheControl, out maxAge))
{
// Invalid message
return;
}
DateTime d;
if (!DateTime.TryParse(date, out d))
{
d = DateTime.Now;
}
DateTime expirationTime = d.AddSeconds(maxAge);
// The specification says the SERVER header should contain three entries, separated by space, like
// "SERVER: OS/version UPnP/1.1 product/version".
// Unfortunately, some clients send entries separated by ", ", like "Linux/2.x.x, UPnP/1.0, pvConnect UPnP SDK/1.0".
// We try to handle all situations correctly here, that's the reason for this ugly code.
// What we've seen until now:
// SERVER: Linux/2.x.x, UPnP/1.0, pvConnect UPnP SDK/1.0 => tokens separated by ','
// SERVER: Windows 2003, UPnP/1.0 DLNADOC/1.50, Serviio/0.5.2 => tokens separated by ',' and additional info in UPnP version token
// SERVER: 3Com-ADSL-11g/1.0 UPnP/1.0 => only two tokens
string[] versionInfos = server.Contains(", ") ? server.Split(new string[] { ", " }, StringSplitOptions.RemoveEmptyEntries) :
server.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string upnpVersionInfo = versionInfos.FirstOrDefault(v => v.StartsWith(UPnPVersion.VERSION_PREFIX));
if (upnpVersionInfo == null)
{
// Invalid message
return;
}
// upnpVersionInfo = 'UPnP/1.0', 'UPnP/1.1', 'UPnP/1.0 DLNADOC/1.50', ..., the UPnP version is always the first token
string[] upnpVersionInfoTokens = upnpVersionInfo.Split(' ');
string upnpVersionInfoToken = upnpVersionInfoTokens[0];
UPnPVersion upnpVersion;
if (!UPnPVersion.TryParse(upnpVersionInfoToken, out upnpVersion))
{
// Invalid message
return;
}
if (upnpVersion.VerMax != 1)
{
// Incompatible UPnP version
return;
}
int searchPort = 1900;
if (upnpVersion.VerMin >= 1)
{
if (bi == null || ci == null)
{
// Invalid message
return;
}
if (sp != null && (!int.TryParse(sp, out searchPort) || searchPort < 49152 || searchPort > 65535))
{
// Invalid message
return;
}
}
RootEntry rootEntry;
DeviceEntry deviceEntry = null;
string serviceType = null;
bool fireDeviceRebooted = false;
bool fireConfigurationChanged = false;
bool fireRootDeviceAdded = false;
bool fireDeviceAdded = false;
bool fireServiceAdded = false;
lock (_cpData.SyncObj)
{
bool rootEntryAdded;
// Use fail-safe code, see comment above about the different SERVER headers
string osVersion = versionInfos.Length < 1 ? string.Empty : versionInfos[0];
string productVersion = versionInfos.Length < 3 ? string.Empty : versionInfos[2];
rootEntry = GetOrCreateRootEntry(deviceUUID, location, upnpVersion, osVersion,
productVersion, expirationTime, config, httpVersion, searchPort, out rootEntryAdded);
if (bi != null && rootEntry.BootID > bootID)
{
// Invalid message
return;
}
uint currentConfigId = rootEntry.GetConfigID(remoteEndPoint);
if (currentConfigId != 0 && currentConfigId != configID)
{
fireConfigurationChanged = true;
}
rootEntry.SetConfigID(remoteEndPoint, configID);
if (!rootEntryAdded && bi != null && rootEntry.BootID < bootID)
{ // Device reboot
// A device, which has rebooted, has lost all its links, so we must forget about the old link registrations and wait for new registrations in alive messages
rootEntry.ClearLinks();
fireDeviceRebooted = true;
}
// Don't add the link before a reboot was detected and thus, rootEntry.ClearLinks() was called
rootEntry.AddOrUpdateLink(config, location, httpVersion, searchPort);
rootEntry.BootID = bootID;
if (messageType == "upnp:rootdevice")
{
rootEntry.GetOrCreateDeviceEntry(deviceUUID);
object value;
if (!rootEntry.ClientProperties.TryGetValue("RootDeviceSetUp", out value))
{
rootEntry = MergeOrMoveRootEntry(rootEntry, deviceUUID);
fireRootDeviceAdded = true;
rootEntry.ClientProperties["RootDeviceSetUp"] = true;
}
}
else if (messageType.StartsWith("urn:"))
{
if (messageType.IndexOf(":device:") > -1)
{
string deviceType;
int deviceTypeVersion;
if (!ParserHelper.TryParseTypeVersion_URN(messageType, out deviceType, out deviceTypeVersion))
{
// Invalid message
return;
}
deviceEntry = rootEntry.GetOrCreateDeviceEntry(deviceUUID);
fireDeviceAdded = string.IsNullOrEmpty(deviceEntry.DeviceType);
deviceEntry.DeviceType = deviceType;
deviceEntry.DeviceTypeVersion = deviceTypeVersion;
}
else if (messageType.IndexOf(":service:") > -1)
{
deviceEntry = rootEntry.GetOrCreateDeviceEntry(deviceUUID);
serviceType = messageType;
if (deviceEntry.Services.Contains(serviceType))
{
return;
}
deviceEntry.Services.Add(serviceType);
fireServiceAdded = true;
}
}
else
{
// Invalid message
return;
}
}
// Raise events after returning the lock
if (fireDeviceRebooted)
{
InvokeDeviceRebooted(rootEntry, fireConfigurationChanged);
}
else if (fireConfigurationChanged)
{
InvokeDeviceConfigurationChanged(rootEntry);
}
if (fireRootDeviceAdded)
{
InvokeRootDeviceAdded(rootEntry);
}
if (fireDeviceAdded)
{
InvokeDeviceAdded(rootEntry, deviceEntry);
}
if (fireServiceAdded)
{
InvokeServiceAdded(rootEntry, deviceEntry, serviceType);
}
}
else if (nts == "ssdp:byebye")
{
RootEntry rootEntry = GetRootEntryByContainedDeviceUUID(deviceUUID);
if (rootEntry != null)
{
if (bi != null && rootEntry.BootID > bootID)
{
// Invalid message
return;
}
RemoveRootEntry(rootEntry);
InvokeRootDeviceRemoved(rootEntry);
}
}
}