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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* [email protected] *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef DHTRPCMSG_H
#define DHTRPCMSG_H
#include <ksocketaddress.h>
#include <util/constants.h>
#include "key.h"
#include "database.h"
namespace bt
{
class BDictNode;
}
using bt::Uint8;
using bt::Uint32;
namespace dht
{
class DHT;
class RPCServer;
enum Type
{
REQ_MSG,
RSP_MSG,
ERR_MSG,
INVALID
};
enum Method
{
PING,
FIND_NODE,
GET_PEERS,
ANNOUNCE_PEER,
NONE
};
/**
* Base class for all RPC messages.
*/
class MsgBase
{
public:
MsgBase(Uint8 mtid,Method m,Type type,const Key & id);
virtual ~MsgBase();
/**
* When this message arrives this function will be called upon the DHT.
* The message should then call the appropriate DHT function (double dispatch)
* @param dh_table Pointer to DHT
*/
virtual void apply(DHT* dh_table) = 0;
/**
* Print the message for debugging purposes.
*/
virtual void print() = 0;
/**
* BEncode the message.
* @param arr Data array
*/
virtual void encode(QByteArray & arr) = 0;
/// Set the origin (i.e. where the message came from)
void setOrigin(const KNetwork::KSocketAddress & o) {origin = o;}
/// Get the origin
const KNetwork::KInetSocketAddress & getOrigin() const {return origin;}
/// Set the origin (i.e. where the message came from)
void setDestination(const KNetwork::KSocketAddress & o) {origin = o;}
/// Get the origin
const KNetwork::KInetSocketAddress & getDestination() const {return origin;}
/// Get the MTID
Uint8 getMTID() const {return mtid;}
/// Set the MTID
void setMTID(Uint8 m) {mtid = m;}
/// Get the id of the sender
const Key & getID() const {return id;}
/// Get the type of the message
Type getType() const {return type;}
/// Get the message it's method
Method getMethod() const {return method;}
protected:
Uint8 mtid;
Method method;
Type type;
Key id;
KNetwork::KInetSocketAddress origin;
};
/**
* Creates a message out of a BDictNode.
* @param dict The BDictNode
* @param srv The RPCServer
* @return A newly created message or 0 upon error
*/
MsgBase* MakeRPCMsg(bt::BDictNode* dict,RPCServer* srv);
MsgBase* MakeRPCMsgTest(bt::BDictNode* dict,dht::Method req_method);
class ErrMsg : public MsgBase
{
public:
ErrMsg(Uint8 mtid,const Key & id,const QString & msg);
virtual ~ErrMsg();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
private:
QString msg;
};
class PingReq : public MsgBase
{
public:
PingReq(const Key & id);
virtual ~PingReq();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
};
class FindNodeReq : public MsgBase
{
public:
FindNodeReq(const Key & id,const Key & target);
virtual ~FindNodeReq();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
const Key & getTarget() const {return target;}
private:
Key target;
};
class GetPeersReq : public MsgBase
{
public:
GetPeersReq(const Key & id,const Key & info_hash);
virtual ~GetPeersReq();
const Key & getInfoHash() const {return info_hash;}
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
protected:
Key info_hash;
};
class AnnounceReq : public GetPeersReq
{
public:
AnnounceReq(const Key & id,const Key & info_hash,bt::Uint16 port,const Key & token);
virtual ~AnnounceReq();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
const Key & getToken() const {return token;}
bt::Uint16 getPort() const {return port;}
private:
bt::Uint16 port;
Key token;
};
class PingRsp : public MsgBase
{
public:
PingRsp(Uint8 mtid,const Key & id);
virtual ~PingRsp();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
};
class FindNodeRsp : public MsgBase
{
public:
FindNodeRsp(Uint8 mtid,const Key & id,const QByteArray & nodes);
virtual ~FindNodeRsp();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
const QByteArray & getNodes() const {return nodes;}
protected:
QByteArray nodes;
};
class GetPeersRsp : public MsgBase
{
public:
GetPeersRsp(Uint8 mtid,const Key & id,const QByteArray & data,const Key & token);
GetPeersRsp(Uint8 mtid,const Key & id,const DBItemList & values,const Key & token);
virtual ~GetPeersRsp();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
const QByteArray & getData() const {return data;}
const DBItemList & getItemList() const {return items;}
const Key & getToken() const {return token;}
bool containsNodes() const {return data.size() > 0;}
bool containsValues() const {return data.size() == 0;}
private:
Key token;
QByteArray data;
DBItemList items;
};
class AnnounceRsp : public MsgBase
{
public:
AnnounceRsp(Uint8 mtid,const Key & id);
virtual ~AnnounceRsp();
virtual void apply(DHT* dh_table);
virtual void print();
virtual void encode(QByteArray & arr);
};
}
#endif
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