ZeroTierOne/root/root.cpp

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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2019 ZeroTier, Inc. https://www.zerotier.com/
*
* 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/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
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#include "../node/Constants.hpp"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
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#include "../node/Packet.hpp"
#include "../node/Utils.hpp"
#include "../node/Address.hpp"
#include "../node/Identity.hpp"
#include "../node/InetAddress.hpp"
#include "../node/Mutex.hpp"
#include "../osdep/OSUtils.hpp"
#include <string>
#include <thread>
#include <map>
#include <vector>
#include <iostream>
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#include <unordered_map>
#include <vector>
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#include <atomic>
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using namespace ZeroTier;
struct PeerInfo
{
InetAddress address;
int64_t lastReceive;
};
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struct AddressHasher { ZT_ALWAYS_INLINE std::size_t operator()(const Address &a) const { return (std::size_t)a.toInt(); } };
struct InetAddressHasher { ZT_ALWAYS_INLINE std::size_t operator()(const InetAddress &ip) const { return (std::size_t)ip.hashCode(); } };
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static std::atomic_bool run;
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static std::unordered_map< Address,std::map< Identity,PeerInfo >,AddressHasher > peersByVirtAddr;
static std::unordered_map< InetAddress,std::map< Identity,PeerInfo >,InetAddressHasher > peersByPhysAddr;
static Mutex peersByVirtAddr_l;
static Mutex peersByAddress_l;
static void handlePacket(const InetAddress *const ip,const Packet *const pkt)
{
char stmp[128];
printf("%s\n",ip->toString(stmp));
}
static int bindSocket(struct sockaddr *bindAddr)
{
int s = socket(bindAddr->sa_family,SOCK_DGRAM,0);
if (s < 0) {
close(s);
return -1;
}
int f = 131072;
setsockopt(s,SOL_SOCKET,SO_RCVBUF,(const char *)&f,sizeof(f));
f = 131072;
setsockopt(s,SOL_SOCKET,SO_SNDBUF,(const char *)&f,sizeof(f));
if (bindAddr->sa_family == AF_INET6) {
f = 1; setsockopt(s,IPPROTO_IPV6,IPV6_V6ONLY,(void *)&f,sizeof(f));
#ifdef IPV6_MTU_DISCOVER
f = 0; setsockopt(s,IPPROTO_IPV6,IPV6_MTU_DISCOVER,&f,sizeof(f));
#endif
#ifdef IPV6_DONTFRAG
f = 0; setsockopt(s,IPPROTO_IPV6,IPV6_DONTFRAG,&f,sizeof(f));
#endif
}
f = 1; setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(void *)&f,sizeof(f));
f = 1; setsockopt(s,SOL_SOCKET,SO_REUSEPORT,(void *)&f,sizeof(f));
f = 1; setsockopt(s,SOL_SOCKET,SO_BROADCAST,(void *)&f,sizeof(f));
#ifdef IP_DONTFRAG
f = 0; setsockopt(s,IPPROTO_IP,IP_DONTFRAG,&f,sizeof(f));
#endif
#ifdef IP_MTU_DISCOVER
f = IP_PMTUDISC_DONT; setsockopt(s,IPPROTO_IP,IP_MTU_DISCOVER,&f,sizeof(f));
#endif
#ifdef SO_NO_CHECK
if (bindAddr->sa_family == AF_INET) {
f = 1; setsockopt(s,SOL_SOCKET,SO_NO_CHECK,(void *)&f,sizeof(f));
}
#endif
if (bind(s,bindAddr,(bindAddr->sa_family == AF_INET) ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6))) {
close(s);
return -1;
}
return s;
}
int main(int argc,char **argv)
{
unsigned int ncores = std::thread::hardware_concurrency();
if (ncores == 0) ncores = 1;
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run = true;
std::vector<int> sockets;
std::vector<std::thread> threads;
for(unsigned int tn=0;tn<ncores;++tn) {
struct sockaddr_in6 in6;
memset(&in6,0,sizeof(in6));
in6.sin6_family = AF_INET6;
in6.sin6_port = htons(ZT_DEFAULT_PORT);
const int s6 = bindSocket((struct sockaddr *)&in6);
if (s6 < 0) {
std::cout << "ERROR: unable to bind to port " << ZT_DEFAULT_PORT << ZT_EOL_S;
exit(1);
}
struct sockaddr_in in4;
memset(&in4,0,sizeof(in4));
in4.sin_family = AF_INET;
in4.sin_port = htons(ZT_DEFAULT_PORT);
const int s4 = bindSocket((struct sockaddr *)&in4);
if (s4 < 0) {
std::cout << "ERROR: unable to bind to port " << ZT_DEFAULT_PORT << ZT_EOL_S;
exit(1);
}
sockets.push_back(s6);
sockets.push_back(s4);
threads.push_back(std::thread([s6]() {
struct sockaddr_in6 in6;
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Packet pkt;
memset(&in6,0,sizeof(in6));
for(;;) {
socklen_t sl = sizeof(in6);
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const int pl = (int)recvfrom(s6,pkt.unsafeData(),pkt.capacity(),0,(struct sockaddr *)&in6,&sl);
if (pl > 0) {
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try {
pkt.setSize((unsigned int)pl);
handlePacket(reinterpret_cast<const InetAddress *>(&in6),&pkt);
} catch ( ... ) {
}
} else {
break;
}
}
}));
threads.push_back(std::thread([s4]() {
struct sockaddr_in in4;
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Packet pkt;
memset(&in4,0,sizeof(in4));
for(;;) {
socklen_t sl = sizeof(in4);
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const int pl = (int)recvfrom(s4,pkt.unsafeData(),pkt.capacity(),0,(struct sockaddr *)&in4,&sl);
if (pl > 0) {
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try {
pkt.setSize((unsigned int)pl);
handlePacket(reinterpret_cast<const InetAddress *>(&in4),&pkt);
} catch ( ... ) {
}
} else {
break;
}
}
}));
}
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while (run) {
sleep(1);
}
return 0;
}