/// <summary>
/// Construct for a lower layer and a cache data set (from which we return the non-volatile data).
/// </summary>
public VolatileFetchingWirelessPeerInfos(IWirelessPeerInfos wirelessPeerInfos, ISnmpLowerLayer lowerLayer)
{
this.lowerLayer = lowerLayer ?? throw new System.ArgumentNullException(nameof(lowerLayer), "lower layer is null");
this.underlyingWirelessPeerInfo = wirelessPeerInfos ?? throw new System.ArgumentNullException(nameof(wirelessPeerInfos), "underlying wireless peer info is null");
this.Details = wirelessPeerInfos.Details.Select(underlyingPeerInfo => new VolatileFetchingWirelessPeerInfo(underlyingPeerInfo, this.lowerLayer)).ToList();
}
/// <summary>
/// Formats as block-formatted string of an <see cref="IWirelessPeerInfos" />.
/// </summary>
/// <param name="wirelessPeerInfos">The data to format.</param>
/// <returns>The formatted string.</returns>
public string Format(IWirelessPeerInfos wirelessPeerInfos)
{
if (wirelessPeerInfos == null)
{
return("<null>");
}
StringBuilder returnBuilder = new StringBuilder(256);
returnBuilder.Append("Wireless Peer Infos: ");
if (wirelessPeerInfos.Details == null)
{
returnBuilder.Append(NotAvailableString);
}
else
{
foreach (var item in wirelessPeerInfos.Details)
{
returnBuilder.AppendLine().AppendLine(SnmpAbstraction.IndentLines(this.Format(item)));
}
}
return(returnBuilder.ToString());
}
/// <summary>
/// Construct from IWirelessPeerInfos.
/// </summary>
public SerializableWirelessPeerInfos(IWirelessPeerInfos inputInfos)
{
if (inputInfos is null)
{
throw new ArgumentNullException(nameof(inputInfos), "The IWirelessPeerInfos to make serializable is null");
}
this.peerInfosBacking = inputInfos.Details.Select(p => new SerializableWirelessPeerInfo(p) as IWirelessPeerInfo).ToList();
this.DeviceAddress = inputInfos.DeviceAddress;
this.DeviceModel = inputInfos.DeviceModel;
}
/// <inheritdoc />
public ILinkDetails DoQuery()
{
// we're only interested in the Wireless interfaces (not in ethernet ports or similar) and hence filter
// for interface type 71 (ieee80211)
// Note: We need to make the result distinct on MAC as some devices tend to return mulitple IEEE 802.11 interfaces with same MAC address.
var wifiInterfaces1 = this.querier1.NetworkInterfaceDetails.Where(i => i.InterfaceType == IanaInterfaceType.Ieee80211).Distinct(this.InterfaceByMacAddressEqualityComparer).ToList();
var wifiInterfaces2 = this.querier2.NetworkInterfaceDetails.Where(i => i.InterfaceType == IanaInterfaceType.Ieee80211).Distinct(this.InterfaceByMacAddressEqualityComparer).ToList();
IWirelessPeerInfos wlPeerInfo1 = this.querier1.WirelessPeerInfos;
IWirelessPeerInfos wlPeerInfo2 = this.querier2.WirelessPeerInfos;
// see if side #2 has peers with MAC address of side #1
var peeringWithSide1 = (from wlp2 in wlPeerInfo2
from wi1 in wifiInterfaces1
where (wlp2.RemoteMacString?.ToLowerInvariant() == wi1.MacAddressString?.ToLowerInvariant())
select new Tuple <IInterfaceDetail, IWirelessPeerInfo>(wi1, wlp2)).SingleOrDefault();
// see if side #1 has peers with MAC address of side #2
var peeringWithSide2 = (from wlp1 in wlPeerInfo1
from wi2 in wifiInterfaces2
where (wlp1.RemoteMacString?.ToLowerInvariant() == wi2.MacAddressString?.ToLowerInvariant())
select new Tuple <IInterfaceDetail, IWirelessPeerInfo>(wi2, wlp1)).SingleOrDefault();
if (peeringWithSide1 == null)
{
throw new HamnetSnmpException($"Side #2 ({this.querier2.Address}) seems to have no peerings with side #1 ({this.querier1.Address})", this.querier2.Address?.ToString(), this.querier1.Address?.ToString());
}
if (peeringWithSide2 == null)
{
throw new HamnetSnmpException($"Side #1 ({this.querier1.Address}) seems to have no peerings with side #2 ({this.querier2.Address})", this.querier1.Address?.ToString(), this.querier2.Address?.ToString());
}
var returnDetails = new LinkDetails(
new LinkDetail[] { new LinkDetail(
this.querier1.Address,
new LinkRelatedResultCollection(
peeringWithSide1.Item1,
peeringWithSide2.Item1,
peeringWithSide2.Item2,
peeringWithSide1.Item2)) },
this.querier1.Address,
this.querier1.SystemData.DeviceModel);
var lazyContainerSum = wifiInterfaces1.Aggregate(TimeSpan.Zero, (a, c) => a += c.QueryDuration);
lazyContainerSum += wifiInterfaces2.Aggregate(TimeSpan.Zero, (a, c) => a += c.QueryDuration);
lazyContainerSum += wlPeerInfo1.Aggregate(TimeSpan.Zero, (a, c) => a += c.QueryDuration);
lazyContainerSum += wlPeerInfo2.Aggregate(TimeSpan.Zero, (a, c) => a += c.QueryDuration);
log.Debug($"LinkDetectionQuery: Lazy container sum = {lazyContainerSum.TotalMilliseconds} ms");
return(returnDetails);
}
/// <summary>
/// Fetches wireless peer data.
/// </summary>
private void FetchWirelessPeerInfo()
{
if (this.wirelessPeerInfosBacking != null)
{
return;
}
Stopwatch stopper = Stopwatch.StartNew();
this.EnsureOpenConnection();
var wirelessPeers = this.TikConnection.LoadList <WirelessRegistrationTable>();
stopper.Stop();
this.wirelessPeerInfosBacking = new SerializableWirelessPeerInfos
{
DeviceAddress = this.Address,
DeviceModel = this.SystemData.DeviceModel,
Details = wirelessPeers.Select(d => this.MakeWirelessPeerInfo(d)).ToList(),
QueryDuration = stopper.Elapsed
};
}
/// <summary>
/// Fetches the wireless peer info from lower querier and saves it to the database.
/// </summary>
private void LowerQuerierFetchWirelessPeerInfo()
{
lock (this.SyncRoot)
{
if (this.volatileFetchingWirelessPeerInfo != null)
{
return;
}
if (this.cacheEntry.WirelessPeerInfos == null)
{
this.InitializeLowerQuerier();
var lowerLayerWirelessPeerInfos = this.lowerQuerier.WirelessPeerInfos;
// we force immediate evaluation in order to ensure that really all cachable OIDs have been set.
lowerLayerWirelessPeerInfos.ForceEvaluateAll();
this.cacheEntry.WirelessPeerInfos = new SerializableWirelessPeerInfos(lowerLayerWirelessPeerInfos);
this.cacheEntry.LastModification = DateTime.UtcNow;
this.cacheDatabaseContext.CacheData.Update(this.cacheEntry);
this.cacheDatabaseContext.SaveChanges();
}
if (this.cacheEntry.ApiUsed.HasFlag(QueryApis.VendorSpecific))
{
log.Info($"Forcing non-cached operation for FetchWirelessPeerInfo of device {this.Address} due to vendor specific API usage");
this.InitializeLowerQuerier();
this.volatileFetchingWirelessPeerInfo = this.lowerQuerier.WirelessPeerInfos;
}
else
{
this.volatileFetchingWirelessPeerInfo = new VolatileFetchingWirelessPeerInfos(this.cacheEntry.WirelessPeerInfos, this.lowerLayer);
}
}
}
/// <summary>
/// Formats a generic object if it's of one of the supported types.
/// </summary>
/// <param name="someObject">The object to format.</param>
/// <returns>The formatted text.</returns>
public string Format(object someObject)
{
if (someObject == null)
{
return("<null>");
}
IDeviceSystemData asDevSysData = someObject as IDeviceSystemData;
if (asDevSysData != null)
{
return(this.Format(asDevSysData));
}
IInterfaceDetails asIfDetails = someObject as IInterfaceDetails;
if (asIfDetails != null)
{
return(this.Format(asIfDetails));
}
IInterfaceDetail asIfDetail = someObject as IInterfaceDetail;
if (asIfDetail != null)
{
return(this.Format(asIfDetail));
}
IWirelessPeerInfos asWiPeerInfos = someObject as IWirelessPeerInfos;
if (asWiPeerInfos != null)
{
return(this.Format(asWiPeerInfos));
}
IWirelessPeerInfo asWiPeerInfo = someObject as IWirelessPeerInfo;
if (asWiPeerInfo != null)
{
return(this.Format(asWiPeerInfo));
}
ILinkDetails asLinkDetails = someObject as ILinkDetails;
if (asLinkDetails != null)
{
return(this.Format(asLinkDetails));
}
IBgpPeers asBgpPeers = someObject as IBgpPeers;
if (asBgpPeers != null)
{
return(this.Format(asBgpPeers));
}
IBgpPeer asBgpPeer = someObject as IBgpPeer;
if (asBgpPeer != null)
{
return(this.Format(asBgpPeer));
}
ITracerouteResult asTracerouteResult = someObject as ITracerouteResult;
if (asTracerouteResult != null)
{
return(this.Format(asTracerouteResult));
}
ITracerouteHop asTracerouteHop = someObject as ITracerouteHop;
if (asTracerouteHop != null)
{
return(this.Format(asTracerouteHop));
}
// fallback: call the object's ToString
return(someObject.ToString());
}