242 lines
6.7 KiB
C++
242 lines
6.7 KiB
C++
/*
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* ZeroTier SDK - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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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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#ifndef ZT_SOCKETTAP_HPP
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#define ZT_SOCKETTAP_HPP
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#include <stdio.h>
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#include <stdlib.h>
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#include <string>
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#include <vector>
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#include <queue>
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#include <utility>
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#include <stdexcept>
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#include <stdint.h>
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#include "Constants.hpp"
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#include "MulticastGroup.hpp"
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#include "Mutex.hpp"
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#include "InetAddress.hpp"
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#include "Thread.hpp"
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#include "Phy.hpp"
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#include "ZeroTierSDK.h"
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#include "picoTCP.hpp"
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#include "Connection.hpp"
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#include "pico_protocol.h"
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#include "pico_stack.h"
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#include "pico_ipv4.h"
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#include "pico_icmp4.h"
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#include "pico_dev_tap.h"
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#include "pico_protocol.h"
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#include "pico_device.h"
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#include "pico_ipv6.h"
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namespace ZeroTier {
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/*
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* Socket Tap -- emulates an Ethernet tap device
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*/
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class SocketTap
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{
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friend class Phy<SocketTap *>;
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public:
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SocketTap(
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const char *homePath,
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const MAC &mac,
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unsigned int mtu,
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unsigned int metric,
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uint64_t nwid,
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const char *friendlyName,
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void (*handler)(void *, void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
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void *arg);
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~SocketTap();
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void setEnabled(bool en);
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bool enabled() const;
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/*
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* Adds an address to the userspace stack interface associated with this SocketTap
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*/
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bool addIp(const InetAddress &ip);
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/*
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* Removes an address from the userspace stack interface associated with this SocketTap
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*/
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bool removeIp(const InetAddress &ip);
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/*
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* Presents data to the userspace stack
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*/
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void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,
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unsigned int len);
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/*
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*
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*/
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std::string deviceName() const;
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/*
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*
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*/
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void setFriendlyName(const char *friendlyName);
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/*
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*
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*/
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void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
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/*
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*
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*/
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void threadMain()
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throw();
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/*
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* For moving data onto the ZeroTier virtual wire
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*/
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void (*_handler)(void *,void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,
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const void *,unsigned int);
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/*
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* Signals us to close the TcpConnection associated with this PhySocket
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*/
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void phyOnUnixClose(PhySocket *sock,void **uptr);
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/*
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* Notifies us that there is data to be read from an application's socket
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*/
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void phyOnUnixData(PhySocket *sock,void **uptr,void *data,ssize_t len);
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/*
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* Notifies us that we can write to an application's socket
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*/
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void phyOnUnixWritable(PhySocket *sock,void **uptr,bool lwip_invoked);
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/****************************************************************************/
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/* Vars */
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/****************************************************************************/
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std::vector<InetAddress> ips() const;
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std::vector<InetAddress> _ips;
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std::string _homePath;
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void *_arg;
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volatile bool _enabled;
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volatile bool _run;
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MAC _mac;
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unsigned int _mtu;
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uint64_t _nwid;
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PhySocket *_unixListenSocket;
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Phy<SocketTap *> _phy;
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std::vector<Connection*> _Connections;
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Thread _thread;
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std::string _dev; // path to Unix domain socket
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std::vector<MulticastGroup> _multicastGroups;
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Mutex _multicastGroups_m;
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Mutex _ips_m, _tcpconns_m, _rx_buf_m, _close_m;
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/****************************************************************************/
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/* Guarded RX Frame Buffer for picoTCP */
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/****************************************************************************/
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unsigned char pico_frame_rxbuf[MAX_PICO_FRAME_RX_BUF_SZ];
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int pico_frame_rxbuf_tot;
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Mutex _pico_frame_rxbuf_m;
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/****************************************************************************/
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/* In these, we will call the stack's corresponding functions, this is */
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/* where one would put logic to select between different stacks */
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/****************************************************************************/
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/*
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* Connect to a remote host via the userspace stack interface associated with this SocketTap
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*/
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int Connect(Connection *conn, int fd, const struct sockaddr *addr, socklen_t addrlen);
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/*
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* Bind to the userspace stack interface associated with this SocketTap
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*/
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int Bind(Connection *conn, int fd, const struct sockaddr *addr, socklen_t addrlen);
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/*
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* Listen for a Connection
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*/
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int Listen(Connection *conn, int fd, int backlog);
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/*
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* Accepts an incoming Connection
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*/
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int Accept(Connection *conn);
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/*
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* Move data from RX buffer to application's "socket"
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*/
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void Read(PhySocket *sock,void **uptr,bool stack_invoked);
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/*
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* Move data from application's "socket" into network stack
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*/
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void Write(Connection *conn);
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/*
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* Closes a Connection
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*/
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void Close(Connection *conn);
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/*
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* Return the address that the socket is bound to
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*/
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void handleGetsockname(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct getsockname_st *getsockname_rpc);
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/*
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* Return the address of the peer connected to this socket
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*/
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void handleGetpeername(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct getsockname_st *getsockname_rpc);
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/****************************************************************************/
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/* Not used in this implementation */
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/****************************************************************************/
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void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *local_address,
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const struct sockaddr *from,void *data,unsigned long len);
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void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success);
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void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN,
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const struct sockaddr *from);
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void phyOnTcpClose(PhySocket *sock,void **uptr);
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void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len);
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void phyOnTcpWritable(PhySocket *sock,void **uptr, bool stack_invoked);
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};
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} // namespace ZeroTier
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#endif
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