You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
278 lines
13 KiB
278 lines
13 KiB
// yacyPeerActions.java
|
|
// -------------------------------------
|
|
// (C) by Michael Peter Christen; mc@anomic.de
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2005
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
//
|
|
// Using this software in any meaning (reading, learning, copying, compiling,
|
|
// running) means that you agree that the Author(s) is (are) not responsible
|
|
// for cost, loss of data or any harm that may be caused directly or indirectly
|
|
// by usage of this softare or this documentation. The usage of this software
|
|
// is on your own risk. The installation and usage (starting/running) of this
|
|
// software may allow other people or application to access your computer and
|
|
// any attached devices and is highly dependent on the configuration of the
|
|
// software which must be done by the user of the software; the author(s) is
|
|
// (are) also not responsible for proper configuration and usage of the
|
|
// software, even if provoked by documentation provided together with
|
|
// the software.
|
|
//
|
|
// Any changes to this file according to the GPL as documented in the file
|
|
// gpl.txt aside this file in the shipment you received can be done to the
|
|
// lines that follows this copyright notice here, but changes must not be
|
|
// done inside the copyright notive above. A re-distribution must contain
|
|
// the intact and unchanged copyright notice.
|
|
// Contributions and changes to the program code must be marked as such.
|
|
|
|
package de.anomic.yacy;
|
|
|
|
import java.io.IOException;
|
|
import java.util.HashMap;
|
|
|
|
import de.anomic.server.serverCodings;
|
|
import de.anomic.server.serverDate;
|
|
import de.anomic.server.logging.serverLog;
|
|
import de.anomic.xml.RSSFeed;
|
|
import de.anomic.xml.RSSMessage;
|
|
|
|
public class yacyPeerActions {
|
|
|
|
private yacySeedDB seedDB;
|
|
private HashMap<String, String> userAgents;
|
|
public long disconnects;
|
|
public yacyDHTAction dhtAction;
|
|
private yacyNewsPool newsPool;
|
|
|
|
public yacyPeerActions(yacySeedDB seedDB, yacyNewsPool newsPool) {
|
|
this.seedDB = seedDB;
|
|
this.newsPool = newsPool;
|
|
this.userAgents = new HashMap<String, String>();
|
|
this.disconnects = 0;
|
|
this.dhtAction = new yacyDHTAction(seedDB);
|
|
}
|
|
|
|
public void close() {
|
|
// the seedDB and newsPool should be cleared elsewhere
|
|
if (userAgents != null) userAgents.clear();
|
|
userAgents = null;
|
|
if (dhtAction != null) dhtAction.close();
|
|
dhtAction.close();
|
|
}
|
|
|
|
public synchronized boolean connectPeer(yacySeed seed, boolean direct) {
|
|
// store a remote peer's seed
|
|
// returns true if the peer is new and previously unknown
|
|
if (seed == null) {
|
|
yacyCore.log.logSevere("connect: WRONG seed (NULL)");
|
|
return false;
|
|
}
|
|
final String error = seed.isProper(false);
|
|
if (error != null) {
|
|
yacyCore.log.logSevere("connect: WRONG seed (" + seed.getName() + "/" + seed.hash + "): " + error);
|
|
return false;
|
|
}
|
|
if ((this.seedDB.mySeedIsDefined()) && (seed.hash.equals(this.seedDB.mySeed().hash))) {
|
|
yacyCore.log.logInfo("connect: SELF reference " + seed.getPublicAddress());
|
|
return false;
|
|
}
|
|
final String peerType = seed.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN);
|
|
|
|
if ((peerType.equals(yacySeed.PEERTYPE_VIRGIN)) || (peerType.equals(yacySeed.PEERTYPE_JUNIOR))) {
|
|
// reject unqualified seeds
|
|
yacyCore.log.logFine("connect: rejecting NOT QUALIFIED " + peerType + " seed " + seed.getName());
|
|
return false;
|
|
}
|
|
|
|
final yacySeed doubleSeed = this.seedDB.lookupByIP(seed.getInetAddress(), true, false, false);
|
|
if ((doubleSeed != null) && (doubleSeed.getPort() == seed.getPort()) && (!(doubleSeed.hash.equals(seed.hash)))) {
|
|
// a user frauds with his peer different peer hashes
|
|
yacyCore.log.logFine("connect: rejecting FRAUD (double hashes " + doubleSeed.hash + "/" + seed.hash + " on same port " + seed.getPort() + ") peer " + seed.getName());
|
|
return false;
|
|
}
|
|
|
|
if (seed.get(yacySeed.LASTSEEN, "").length() != 14) {
|
|
// hack for peers that do not have a LastSeen date
|
|
seed.setLastSeenUTC();
|
|
yacyCore.log.logFine("connect: reset wrong date (" + seed.getName() + "/" + seed.hash + ")");
|
|
}
|
|
|
|
// connection time
|
|
final long nowUTC0Time = System.currentTimeMillis(); // is better to have this value in a variable for debugging
|
|
long ctimeUTC0 = seed.getLastSeenUTC();
|
|
|
|
if (ctimeUTC0 > nowUTC0Time) {
|
|
// the peer is future-dated, correct it
|
|
seed.setLastSeenUTC();
|
|
ctimeUTC0 = nowUTC0Time;
|
|
assert (seed.getLastSeenUTC() - ctimeUTC0 < 100);
|
|
}
|
|
if (Math.abs(nowUTC0Time - ctimeUTC0) > 60 * 60 * 24 * 1000) {
|
|
// the new connection is out-of-age, we reject the connection
|
|
yacyCore.log.logFine("connect: rejecting out-dated peer '" + seed.getName() + "' from " + seed.getPublicAddress() + "; nowUTC0=" + nowUTC0Time + ", seedUTC0=" + ctimeUTC0 + ", TimeDiff=" + serverDate.formatInterval(Math.abs(nowUTC0Time - ctimeUTC0)));
|
|
return false;
|
|
}
|
|
|
|
// disconnection time
|
|
long dtimeUTC0;
|
|
final yacySeed disconnectedSeed = seedDB.getDisconnected(seed.hash);
|
|
if (disconnectedSeed == null) {
|
|
dtimeUTC0 = 0; // never disconnected: virtually disconnected maximum time ago
|
|
} else {
|
|
dtimeUTC0 = disconnectedSeed.getLong("dct", 0);
|
|
}
|
|
|
|
if (direct) {
|
|
// remember the moment
|
|
// Date applies the local UTC offset, which is wrong
|
|
// we correct that by subtracting the local offset and adding
|
|
// the remote offset.
|
|
seed.setLastSeenUTC();
|
|
seed.setFlagDirectConnect(true);
|
|
} else {
|
|
// set connection flag
|
|
if (Math.abs(nowUTC0Time - ctimeUTC0) > 120000) seed.setFlagDirectConnect(false); // 2 minutes
|
|
}
|
|
|
|
// update latest version number
|
|
if (seed.getVersion() > yacyVersion.latestRelease) yacyVersion.latestRelease = seed.getVersion();
|
|
|
|
// prepare to update
|
|
if (disconnectedSeed != null) {
|
|
// if the indirect connect aims to announce a peer that we know
|
|
// has been disconnected then we compare the dates:
|
|
// if the new peer has a LastSeen date, and that date is before
|
|
// the disconnection date, then we ignore the new peer
|
|
if (!direct) {
|
|
if (ctimeUTC0 < dtimeUTC0) {
|
|
// the disconnection was later, we reject the connection
|
|
yacyCore.log.logFine("connect: rejecting disconnected peer '" + seed.getName() + "' from " + seed.getPublicAddress());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// this is a return of a lost peer
|
|
yacyCore.log.logFine("connect: returned KNOWN " + peerType + " peer '" + seed.getName() + "' from " + seed.getPublicAddress());
|
|
this.seedDB.addConnected(seed);
|
|
return true;
|
|
} else {
|
|
final yacySeed connectedSeed = this.seedDB.getConnected(seed.hash);
|
|
if (connectedSeed != null) {
|
|
// the seed is known: this is an update
|
|
try {
|
|
// if the old LastSeen date is later then the other
|
|
// info, then we reject the info
|
|
if ((ctimeUTC0 < (connectedSeed.getLastSeenUTC())) && (!direct)) {
|
|
yacyCore.log.logFine("connect: rejecting old info about peer '" + seed.getName() + "'");
|
|
return false;
|
|
}
|
|
|
|
/*if (connectedSeed.getName() != seed.getName()) {
|
|
// TODO: update seed name lookup cache
|
|
}*/
|
|
} catch (NumberFormatException e) {
|
|
yacyCore.log.logFine("connect: rejecting wrong peer '" + seed.getName() + "' from " + seed.getPublicAddress() + ". Cause: " + e.getMessage());
|
|
return false;
|
|
}
|
|
yacyCore.log.logFine("connect: updated KNOWN " + ((direct) ? "direct " : "") + peerType + " peer '" + seed.getName() + "' from " + seed.getPublicAddress());
|
|
seedDB.addConnected(seed);
|
|
return true;
|
|
} else {
|
|
// the seed is new
|
|
if ((seedDB.mySeedIsDefined()) && (seed.getIP().equals(this.seedDB.mySeed().getIP()))) {
|
|
// seed from the same IP as the calling client: can be
|
|
// the case if there runs another one over a NAT
|
|
yacyCore.log.logFine("connect: saved NEW seed (myself IP) " + seed.getPublicAddress());
|
|
} else {
|
|
// completely new seed
|
|
yacyCore.log.logFine("connect: saved NEW " + peerType + " peer '" + seed.getName() + "' from " + seed.getPublicAddress());
|
|
}
|
|
this.seedDB.addConnected(seed);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
public boolean peerArrival(yacySeed peer, boolean direct) {
|
|
if (peer == null) return false;
|
|
boolean res = connectPeer(peer, direct);
|
|
if (res) {
|
|
// perform all actions if peer is effective new
|
|
dhtAction.processPeerArrival(peer, direct);
|
|
this.processPeerArrival(peer, direct);
|
|
RSSFeed.channels(RSSFeed.PEERNEWS).addMessage(new RSSMessage(peer.getName() + " joined the network", "", ""));
|
|
}
|
|
return res;
|
|
}
|
|
|
|
public void peerDeparture(yacySeed peer, String cause) {
|
|
if (peer == null) return;
|
|
// we do this if we did not get contact with the other peer
|
|
yacyCore.log.logFine("connect: no contact to a " + peer.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN) + " peer '" + peer.getName() + "' at " + peer.getPublicAddress() + ". Cause: " + cause);
|
|
synchronized (seedDB) {
|
|
if (!seedDB.hasDisconnected(peer.hash)) { disconnects++; }
|
|
peer.put("dct", Long.toString(System.currentTimeMillis()));
|
|
seedDB.addDisconnected(peer); // update info
|
|
}
|
|
// perform all actions
|
|
dhtAction.processPeerDeparture(peer);
|
|
RSSFeed.channels(RSSFeed.PEERNEWS).addMessage(new RSSMessage(peer.getName() + " left the network", "", ""));
|
|
}
|
|
|
|
public void peerPing(yacySeed peer) {
|
|
if (peer == null) return;
|
|
// this is called only if the peer has junior status
|
|
seedDB.addPotential(peer);
|
|
// perform all actions
|
|
processPeerArrival(peer, true);
|
|
RSSFeed.channels(RSSFeed.PEERNEWS).addMessage(new RSSMessage(peer.getName() + " sent me a ping", "", ""));
|
|
}
|
|
|
|
private void processPeerArrival(yacySeed peer, boolean direct) {
|
|
String recordString = peer.get("news", null);
|
|
//System.out.println("### triggered news arrival from peer " + peer.getName() + ", news " + ((recordString == null) ? "empty" : "attached"));
|
|
if ((recordString == null) || (recordString.length() == 0)) return;
|
|
String decodedString = de.anomic.tools.crypt.simpleDecode(recordString, "");
|
|
yacyNewsRecord record = yacyNewsRecord.newRecord(decodedString);
|
|
if (record != null) {
|
|
//System.out.println("### news arrival from peer " + peer.getName() + ", decoded=" + decodedString + ", record=" + recordString + ", news=" + record.toString());
|
|
String cre1 = serverCodings.string2map(decodedString, ",").get("cre");
|
|
String cre2 = serverCodings.string2map(record.toString(), ",").get("cre");
|
|
if ((cre1 == null) || (cre2 == null) || (!(cre1.equals(cre2)))) {
|
|
System.out.println("### ERROR - cre are not equal: cre1=" + cre1 + ", cre2=" + cre2);
|
|
return;
|
|
}
|
|
try {
|
|
synchronized (this.newsPool) {this.newsPool.enqueueIncomingNews(record);}
|
|
} catch (IOException e) {
|
|
serverLog.logSevere("YACY", "processPeerArrival", e);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void setUserAgent(String IP, String userAgent) {
|
|
userAgents.put(IP, userAgent);
|
|
}
|
|
|
|
public String getUserAgent(String IP) {
|
|
String userAgent = userAgents.get(IP);
|
|
return (userAgent == null) ? "" : userAgent;
|
|
}
|
|
}
|