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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2015 ZeroTier, Inc.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include <sys/poll.h>
#include <string>
#include "../osdep/Phy.hpp"
#include "NetconEthernetTap.hpp"
#include "Intercept.h"
#include "LWIPStack.hpp"
#ifndef _NETCON_SERVICE_HPP
#define _NETCON_SERVICE_HPP
using namespace std;
namespace ZeroTier {
enum NetconConnectionType { RPC, BUFFER };
class NetconEthernetTap;
/*
* A helper class for passing a reference to _phy to LWIP callbacks as a "state"
*/
class Larg
{
public:
NetconEthernetTap *tap;
PhySocket *sock;
Larg(NetconEthernetTap *_tap, PhySocket *_sock) : tap(_tap), sock(_sock) {}
};
// prototypes
class NetconClient;
class NetconConnection;
/*
* A data connection, any number of these may be associated with a NetconClient
*/
class NetconConnection
{
public:
int their_fd;
unsigned char buf[DEFAULT_READ_BUFFER_SIZE];
int idx;
NetconConnectionType type;
struct tcp_pcb *pcb;
PhySocket *sock;
NetconClient *owner;
NetconConnection(NetconConnectionType type, PhySocket *sock) : type(type), sock(sock) {}
};
/*
* A "harnessed" client with associated rpc and data connections.
*/
class NetconClient
{
public:
vector<NetconConnection*> connections;
int tid;
bool waiting_for_retval;
NetconConnection *rpc;
NetconConnection* unmapped_conn;
NetconConnection *addConnection(NetconConnectionType type, PhySocket *sock)
{
NetconConnection *new_conn = new NetconConnection(type, sock);
new_conn->owner = this;
return new_conn;
}
// Check data and RPC connections
NetconConnection *getConnection(PhySocket *sock)
{
if(sock && sock == rpc->sock) {
return rpc;
}
for(size_t i=0; i<connections.size(); i++) {
if(sock == connections[i]->sock) return connections[i];
}
return NULL;
}
//
NetconConnection *getConnectionByTheirFD(int fd)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->their_fd == fd) return connections[i];
}
return NULL;
}
//
NetconConnection *getConnectionByPCB(struct tcp_pcb *pcb)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->pcb == pcb) return connections[i];
}
return NULL;
}
NetconConnection *containsPCB(struct tcp_pcb *pcb)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->pcb == pcb) return connections[i];
}
return NULL;
}
void removeConnection(PhySocket *sock)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->sock == sock)
connections.erase(connections.begin() + i);
}
}
};
} // namespace ZeroTier
#endif
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