mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 14:52:24 +00:00
236 lines
7.3 KiB
C++
236 lines
7.3 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, Inc.
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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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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef ZT_NETCONETHERNETTAP_HPP
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#define ZT_NETCONETHERNETTAP_HPP
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#ifdef ZT_ENABLE_NETCON
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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 <stdexcept>
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#include "../node/Constants.hpp"
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#include "../node/MulticastGroup.hpp"
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#include "../node/Mutex.hpp"
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#include "../node/InetAddress.hpp"
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#include "../osdep/Thread.hpp"
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#include "../osdep/Phy.hpp"
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#include "NetconService.hpp"
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#include "NetconUtilities.hpp"
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#include "netif/etharp.h"
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namespace ZeroTier {
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class NetconEthernetTap;
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/**
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* Network Containers instance -- emulates an Ethernet tap device as far as OneService knows
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*/
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class NetconEthernetTap
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{
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friend class Phy<NetconEthernetTap *>;
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public:
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NetconEthernetTap(
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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 *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
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void *arg);
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~NetconEthernetTap();
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void setEnabled(bool en);
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bool enabled() const;
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bool addIp(const InetAddress &ip);
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bool removeIp(const InetAddress &ip);
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std::vector<InetAddress> ips() const;
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void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
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std::string deviceName() const;
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void setFriendlyName(const char *friendlyName);
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void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
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void threadMain()
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throw();
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LWIPStack *lwipstack;
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uint64_t _nwid;
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void (*_handler)(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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private:
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// LWIP callbacks
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static err_t nc_poll(void* arg, struct tcp_pcb *tpcb);
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static err_t nc_accept(void *arg, struct tcp_pcb *newpcb, err_t err);
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static err_t nc_recved(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err);
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static void nc_err(void *arg, err_t err);
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static void nc_close(struct tcp_pcb *tpcb);
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static err_t nc_send(struct tcp_pcb *tpcb);
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static err_t nc_sent(void *arg, struct tcp_pcb *tpcb, u16_t len);
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static err_t nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err);
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// RPC handlers (from NetconIntercept)
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void unload_rpc(void *data, pid_t &pid, pid_t &tid, int &rpc_count, char (timestamp[20]), char &cmd, void* &payload);
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void handle_bind(PhySocket *sock, void **uptr, struct bind_st *bind_rpc);
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void handle_listen(PhySocket *sock, void **uptr, struct listen_st *listen_rpc);
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void handle_map_request(PhySocket *sock, void **uptr, unsigned char* buf);
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void handle_retval(PhySocket *sock, void **uptr, int rpc_count, int newfd);
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TcpConnection * handle_socket(PhySocket *sock, void **uptr, struct socket_st* socket_rpc);
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void handle_connect(PhySocket *sock, void **uptr, struct connect_st* connect_rpc);
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void handle_write(TcpConnection *conn);
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int send_return_value(TcpConnection *conn, int retval, int _errno);
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int send_return_value(int fd, int retval, int _errno);
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void phyOnDatagram(PhySocket *sock,void **uptr,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,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);
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void phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN);
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void phyOnUnixClose(PhySocket *sock,void **uptr);
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void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len);
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void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable);
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ip_addr_t convert_ip(struct sockaddr_in * addr)
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{
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ip_addr_t conn_addr;
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struct sockaddr_in *ipv4 = addr;
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short a = ip4_addr1(&(ipv4->sin_addr));
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short b = ip4_addr2(&(ipv4->sin_addr));
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short c = ip4_addr3(&(ipv4->sin_addr));
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short d = ip4_addr4(&(ipv4->sin_addr));
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IP4_ADDR(&conn_addr, a,b,c,d);
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return conn_addr;
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}
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// Client helpers
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TcpConnection *getConnectionByTheirFD(PhySocket *sock, int fd);
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void closeConnection(TcpConnection *conn);
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void closeAll();
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void closeClient(PhySocket *sock);
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void compact_dump();
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void dump();
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void die(int exret);
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Phy<NetconEthernetTap *> _phy;
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PhySocket *_unixListenSocket;
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std::vector<TcpConnection*> tcp_connections;
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std::vector<PhySocket*> rpc_sockets;
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std::map<PhySocket*, pid_t> pidmap;
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pid_t rpc_counter = -1;
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netif interface;
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MAC _mac;
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Thread _thread;
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std::string _homePath;
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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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std::vector<InetAddress> _ips;
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Mutex _ips_m;
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unsigned int _mtu;
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volatile bool _enabled;
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volatile bool _run;
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};
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/*------------------------------------------------------------------------------
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------------------------ low-level Interface functions -------------------------
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------------------------------------------------------------------------------*/
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static err_t low_level_output(struct netif *netif, struct pbuf *p);
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static err_t tapif_init(struct netif *netif)
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{
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// Actual init functionality is in addIp() of tap
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return ERR_OK;
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}
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static err_t low_level_output(struct netif *netif, struct pbuf *p)
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{
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struct pbuf *q;
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char buf[ZT_MAX_MTU+32];
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char *bufptr;
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int tot_len = 0;
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ZeroTier::NetconEthernetTap *tap = (ZeroTier::NetconEthernetTap*)netif->state;
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/* initiate transfer(); */
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bufptr = buf;
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for(q = p; q != NULL; q = q->next) {
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/* Send the data from the pbuf to the interface, one pbuf at a
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time. The size of the data in each pbuf is kept in the ->len
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variable. */
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/* send data from(q->payload, q->len); */
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memcpy(bufptr, q->payload, q->len);
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bufptr += q->len;
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tot_len += q->len;
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}
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// [Send packet to network]
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// Split ethernet header and feed into handler
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struct eth_hdr *ethhdr;
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ethhdr = (struct eth_hdr *)buf;
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ZeroTier::MAC src_mac;
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ZeroTier::MAC dest_mac;
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src_mac.setTo(ethhdr->src.addr, 6);
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dest_mac.setTo(ethhdr->dest.addr, 6);
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tap->_handler(tap->_arg,tap->_nwid,src_mac,dest_mac,
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Utils::ntoh((uint16_t)ethhdr->type),0,buf + sizeof(struct eth_hdr),tot_len - sizeof(struct eth_hdr));
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return ERR_OK;
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}
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} // namespace ZeroTier
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#endif // ZT_ENABLE_NETCON
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#endif
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