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127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
/*
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* Hans - IP over ICMP
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* Copyright (C) 2009 Friedrich Schöller <hans@schoeller.se>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef SERVER_H
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#define SERVER_H
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#include "worker.h"
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#include "auth.h"
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#include <map>
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#include <queue>
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#include <vector>
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#include <set>
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class Server : public Worker
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{
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public:
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Server(int tunnelMtu, const char *deviceName, const char *passphrase, uint32_t network, bool answerEcho, uid_t uid, gid_t gid, int pollTimeout);
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virtual ~Server();
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// change some time:
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// struct __attribute__ ((__packed__)) ClientConnectData
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struct ClientConnectData
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{
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uint8_t maxPolls;
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uint32_t desiredIp;
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};
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static const Worker::TunnelHeader::Magic magic;
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protected:
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struct Packet
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{
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int type;
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std::vector<char> data;
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};
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struct ClientData
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{
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enum State
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{
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STATE_NEW,
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STATE_CHALLENGE_SENT,
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STATE_ESTABLISHED
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};
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struct EchoId
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{
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EchoId(uint16_t id, uint16_t seq) { this->id = id; this->seq = seq; }
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uint16_t id;
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uint16_t seq;
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};
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uint32_t realIp;
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uint32_t tunnelIp;
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std::queue<Packet> pendingPackets;
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int maxPolls;
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std::queue<EchoId> pollIds;
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Time lastActivity;
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State state;
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Auth::Challenge challenge;
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};
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typedef std::vector<ClientData> ClientList;
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typedef std::map<uint32_t, int> ClientIpMap;
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virtual bool handleEchoData(const TunnelHeader &header, int dataLength, uint32_t realIp, bool reply, uint16_t id, uint16_t seq);
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virtual void handleTunData(int dataLength, uint32_t sourceIp, uint32_t destIp);
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virtual void handleTimeout();
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virtual void run();
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void serveTun(ClientData *client);
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void handleUnknownClient(const TunnelHeader &header, int dataLength, uint32_t realIp, uint16_t echoId, uint16_t echoSeq);
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void removeClient(ClientData *client);
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void sendChallenge(ClientData *client);
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void checkChallenge(ClientData *client, int dataLength);
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void sendReset(ClientData *client);
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void sendEchoToClient(ClientData *client, int type, int dataLength);
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void pollReceived(ClientData *client, uint16_t echoId, uint16_t echoSeq);
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uint32_t reserveTunnelIp(uint32_t desiredIp);
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void releaseTunnelIp(uint32_t tunnelIp);
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ClientData *getClientByTunnelIp(uint32_t ip);
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ClientData *getClientByRealIp(uint32_t ip);
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Auth auth;
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uint32_t network;
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std::set<uint32_t> usedIps;
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uint32_t latestAssignedIpOffset;
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Time pollTimeout;
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ClientList clientList;
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ClientIpMap clientRealIpMap;
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ClientIpMap clientTunnelIpMap;
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};
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#endif
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