/**
* Call this when you have a result packet belonging to this search result object
* */
public void PushResultPacket(G2PacketQH2 pack)
{
lock (LockBuffer)
{
Buffer.PushPacketToReceive(pack);
Monitor.Pulse(LockBuffer);
}
}
private string getVendorCodeFromQueryHit(G2PacketQH2 qh2)
{
G2Packet vendorPacket = qh2.getFirstChildPacket(G2PacketType.V);
if (vendorPacket == null)
{
return("");
}
return(((G2PacketV)vendorPacket).Str);
}
private string getDNSNameFromQueryHit(G2PacketQH2 qh2)
{
G2Packet dns = qh2.getFirstChildPacket(G2PacketType.DNS);
if (dns == null)
{
return("");
}
return(((G2PacketDNS)dns).Str);
}
/** Search address of the servent
* may be null
**/
private static NodeAddress getAddressFromQueryHit(G2PacketQH2 qh2)
{
G2Packet p = qh2.getFirstChildPacket(G2PacketType.NA);
if (p == null)
{
return(null);
}
G2PacketNA na = p as G2PacketNA;
return(na.node);
}
private void SearchResultThread()
{
while (ContinueRegrouping)
{
// take a packet from the buffer
G2PacketQH2 resultPack = PollResultPacket();
if (resultPack == null)
{
continue;
}
// append it to the global result of this search
AppendResult(resultPack);
}
G2Log.Write("SearchResult (" + SearchedWord + ") STOPPING .....");
}
/* *
* Return the nickname if there is one
* otherwise return empty string
* */
private static String getNickFromQueryHit(G2PacketQH2 qh2)
{
G2Packet upro = qh2.getFirstChildPacket(G2PacketType.UPRO);
if (upro == null)
{
return("");
}
G2Packet nick = upro.getFirstChildPacket(G2PacketType.NICK);
if (nick == null)
{
return("");
}
return(((G2PacketNICK)nick).Str);
}
/** G2Peer will parse the packet itself to get the relevant info
* **/
public static G2Peer ParseG2Peer(G2PacketQH2 resultPacket)
{
NodeAddress node = getAddressFromQueryHit(resultPacket);
if (node == null)
{
return(null);
}
string nickname = getNickFromQueryHit(resultPacket);
GUID g = ((G2PacketGU)(resultPacket.getFirstChildPacket(G2PacketType.GU))).nodeGuid;
G2Peer peer = new G2Peer(node.ipv4.ToString(), BitConverter.ToString(g.bytes), node.port, nickname);
peer.Browsable = resultPacket.getFirstChildPacket(G2PacketType.BH) == null ? false : true;
peer.Firewalled = resultPacket.getFirstChildPacket(G2PacketType.FW) == null ? false : true;
peer.VendorCode = resultPacket.getStringFromChildType(G2PacketType.V);
peer.DNSName = resultPacket.getStringFromChildType(G2PacketType.DNS);
peer.AlternatePeers = getAlternateLocationsFromQueryHit(resultPacket);
return(peer);
}
/**
* Stop the connection to the peer,
* and sends the results back
* */
private void SearchTimeOut(Object sender, EventArgs args)
{
G2Packet pack = null;
while ((pack = Peer.Buffer.PollPacketToReceive()) != null)
{
G2PacketQH2 qh2 = pack as G2PacketQH2;
if (qh2 == null)
{
continue;
}
packetResults.Add(qh2);
}
Peer.Close();
if (EndSearch != null)
{
EndSearch(referenceToPeer, referenceToSearchResults, packetResults);
}
}
/**
* Take a search related packets i.e. QA (ack) or QH2 (hit)
* and stores it into SearchResults class
* */
public void EnqueueResultPacket(NodePeer p, G2Packet pack)
{
// a hub packet ACK a query
if (pack.type == G2PacketType.QA)
{
G2PacketQA qa = pack as G2PacketQA;
G2SearchResults res = null;
bool exists = SearchResults.TryGetValue(qa.guid, out res);
if (!exists) // no entry => not a search we initiated
{
G2Log.Write("G2SearchManager : Received ACK of non asked Query");
}
else
{
res.SetAcknowledgement(qa);
G2Log.Write("G2SearchManager Received ACK of search " + SearchDB[qa.guid].Keywords[0]);
}
}
// Hit packet !
else if (pack.type == G2PacketType.QH2)
{
G2PacketQH2 qh2 = pack as G2PacketQH2;
G2SearchResults res = null;
bool exists = SearchResults.TryGetValue(qh2.searchGuid, out res);
if (exists)
{ // a new result packet coming for a requested query
res.PushResultPacket(qh2);
//if (res.TotalFiles > MAX_RESULTS)
// G2Network.Instance.StopNetwork();
}
else // got a response for a query we did not ask ?
{
G2Log.Write("G2SearchManager : Received a Hit on a NON ASKED Query");
}
}
}
private static ActionInnocence.P2PScan.PeerCollection getAlternateLocationsFromQueryHit(G2PacketQH2 qh2)
{
G2Packet pack = qh2.getFirstChildPacket(G2PacketType.ALT);
if (pack == null)
{
return(null);
}
G2PacketALT altPack = pack as G2PacketALT;
ActionInnocence.P2PScan.PeerCollection coll = new ActionInnocence.P2PScan.PeerCollection();
foreach (NodeAddress add in altPack.Addresses)
{
coll.Add(new ActionInnocence.P2PScan.Peer(add.ipv4.ToString(), add.ToString(), add.port, ""));
}
return(coll);
}
private void AppendResult(G2PacketQH2 res)
{
G2Peer g2peer = G2Peer.ParseG2Peer(res);
if (g2peer == null)
{
return;
}
/** Create a new search result from the hub ip and the search transaction */
SearchResult Results = new SearchResult(new System.Net.IPEndPoint(res.RemotePeer.Address, res.RemotePeer.Port), Transaction);
bool PeerBrowsable = false;
bool isFirewalled = false;
int fileCount = 0;
List <G2File> files = new List <G2File>();
// add the files to the collections.
foreach (G2Packet child in res.children)
{
if (child.type.Equals(G2PacketType.BH))
{
PeerBrowsable = true;
continue;
}
if (child.type.Equals(G2PacketType.FW))
{
isFirewalled = true;
continue;
}
if (!child.type.Equals(G2PacketType.H))
{
continue;
}
G2PacketH hit = child as G2PacketH;
G2File file = G2File.ParseHit(hit, FileLocationFound.ServerIndex);
if (file == null)
{
continue;
}
files.Add(file);
fileCount += 1;
}
if (fileCount == 0)
{
return; // may have some hosts having only partial file,so no file for the application ...
}
Results.PeerCollection.Add(g2peer);
Peer p = Results.PeerCollection.Find(g2peer); // to get the right object reference may not be needed .. ?
if (p.Ip.StartsWith("192.168"))
{
return;
}
foreach (G2File file in files)
{
p.Files.Add(file);
file.PeerDiffusedFiles.Add(p); // ?? necessary or wrong ?
Results.FileCollection.Add(file);
}
files.Clear();
files = null;
TotalFiles += fileCount;
G2Log.Write("SearchResults : New result from " + res.RemotePeer.ToString() + " for " + SearchedWord + " ==> " + fileCount + " files");
// try to see if we already have launched an browsing research on this peer or not
bool notAlreadySearched = !PeersBrowsed.Contains(p);
// make sure that the browsing will not increase the waiting time of the application for the result
bool notTooLate = StartSearchTime.AddMilliseconds(Settings.WAIT_TIME_BROWSING_MS)
< StartSearchTime.AddMilliseconds(Settings.SEARCH_TIME_OUT_MS + 100); // +100 to make sure browsing has time to regroup all
bool notConnectedHub = res.RemotePeer.Address.ToString() != p.Ip;
// verify that we dont search the hub, taht the peer is browsable and NOT firewalled
// TODO can send a PUSH packet to the hub that will bring the peer to establish a connection to us
if (notConnectedHub && PeerBrowsable && !isFirewalled && notAlreadySearched && notTooLate)
{
PeersBrowsed.Add(p);
G2BrowseSearch browser = new G2BrowseSearch(p, Results);
browser.EndSearch += new BrowseSearchEnd(BrowsingTerminated);
browser.StartBrowsing();
}
else // sends results to application
{
RegroupResults(Results);
}
}
