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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/
*/
#ifndef ZT_NETCONETHERNETTAP_HPP
#define ZT_NETCONETHERNETTAP_HPP
#ifdef ZT_ENABLE_NETCON
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>
#include <stdexcept>
#include "../node/Constants.hpp"
#include "../node/MulticastGroup.hpp"
#include "../node/Mutex.hpp"
#include "../node/InetAddress.hpp"
#include "../osdep/Thread.hpp"
#include "../osdep/Phy.hpp"
#include "netif/etharp.h"
struct tcp_pcb;
struct socket_st;
struct listen_st;
struct bind_st;
struct connect_st;
namespace ZeroTier {
class NetconEthernetTap;
class TcpConnection;
class Larg;
class LWIPStack;
/**
* Network Containers instance -- emulates an Ethernet tap device as far as OneService knows
*/
class NetconEthernetTap
{
friend class Phy<NetconEthernetTap *>;
public:
NetconEthernetTap(
const char *homePath,
const MAC &mac,
unsigned int mtu,
unsigned int metric,
uint64_t nwid,
const char *friendlyName,
void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
void *arg);
~NetconEthernetTap();
void setEnabled(bool en);
bool enabled() const;
bool addIp(const InetAddress &ip);
bool removeIp(const InetAddress &ip);
std::vector<InetAddress> ips() const;
void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
std::string deviceName() const;
void setFriendlyName(const char *friendlyName);
void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
void threadMain()
throw();
LWIPStack *lwipstack;
uint64_t _nwid;
void (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
void *_arg;
private:
// LWIP callbacks
static err_t nc_poll(void* arg, struct tcp_pcb *tpcb);
static err_t nc_accept(void *arg, struct tcp_pcb *newpcb, err_t err);
static err_t nc_recved(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err);
static void nc_err(void *arg, err_t err);
static void nc_close(struct tcp_pcb *tpcb);
static err_t nc_send(struct tcp_pcb *tpcb);
static err_t nc_sent(void *arg, struct tcp_pcb *tpcb, u16_t len);
static err_t nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err);
// RPC handlers (from NetconIntercept)
void unload_rpc(void *data, pid_t &pid, pid_t &tid, int &rpc_count, char (timestamp[20]), char &cmd, void* &payload);
void handle_bind(PhySocket *sock, void **uptr, struct bind_st *bind_rpc);
void handle_listen(PhySocket *sock, void **uptr, struct listen_st *listen_rpc);
void handle_map_request(PhySocket *sock, void **uptr, unsigned char* buf);
void handle_retval(PhySocket *sock, void **uptr, int rpc_count, int newfd);
TcpConnection * handle_socket(PhySocket *sock, void **uptr, struct socket_st* socket_rpc);
void handle_connect(PhySocket *sock, void **uptr, struct connect_st* connect_rpc);
void handle_write(TcpConnection *conn);
int send_return_value(TcpConnection *conn, int retval, int _errno);
int send_return_value(int fd, int retval, int _errno);
void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *from,void *data,unsigned long len);
void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success);
void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN,const struct sockaddr *from);
void phyOnTcpClose(PhySocket *sock,void **uptr);
void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len);
void phyOnTcpWritable(PhySocket *sock,void **uptr);
void phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN);
void phyOnUnixClose(PhySocket *sock,void **uptr);
void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len);
void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable);
ip_addr_t convert_ip(struct sockaddr_in * addr)
{
ip_addr_t conn_addr;
struct sockaddr_in *ipv4 = addr;
short a = ip4_addr1(&(ipv4->sin_addr));
short b = ip4_addr2(&(ipv4->sin_addr));
short c = ip4_addr3(&(ipv4->sin_addr));
short d = ip4_addr4(&(ipv4->sin_addr));
IP4_ADDR(&conn_addr, a,b,c,d);
return conn_addr;
}
// Client helpers
TcpConnection *getConnectionByTheirFD(PhySocket *sock, int fd);
void closeConnection(TcpConnection *conn);
void closeAll();
void closeClient(PhySocket *sock);
void compact_dump();
void dump();
void die(int exret);
Phy<NetconEthernetTap *> _phy;
PhySocket *_unixListenSocket;
std::vector<TcpConnection*> tcp_connections;
std::vector<PhySocket*> rpc_sockets;
std::map<PhySocket*, pid_t> pidmap;
pid_t rpc_counter;
netif interface;
MAC _mac;
Thread _thread;
std::string _homePath;
std::string _dev; // path to Unix domain socket
std::vector<MulticastGroup> _multicastGroups;
Mutex _multicastGroups_m;
std::vector<InetAddress> _ips;
Mutex _ips_m;
unsigned int _mtu;
volatile bool _enabled;
volatile bool _run;
};
} // namespace ZeroTier
#endif // ZT_ENABLE_NETCON
#endif
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