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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2012-2013 ZeroTier Networks LLC
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <string>
#include <stdexcept>
#include <iostream>
#include "node/Constants.hpp"
#ifdef __WINDOWS__
#include <Windows.h>
#else
#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#endif
#include <openssl/rand.h>
#include "node/Node.hpp"
#include "node/Utils.hpp"
#include "launcher.h"
using namespace ZeroTier;
// ---------------------------------------------------------------------------
// Override libcrypto default RAND_ with Utils::getSecureRandom(), which uses
// a system strong random source. This is because OpenSSL libcrypto's default
// RAND_ implementation uses uninitialized memory as one of its entropy
// sources, which plays havoc with all kinds of debuggers and auditing tools.
static void _zeroTier_rand_cleanup() {}
static void _zeroTier_rand_add(const void *buf, int num, double add_entropy) {}
static int _zeroTier_rand_status() { return 1; }
static void _zeroTier_rand_seed(const void *buf, int num) {}
static int _zeroTier_rand_bytes(unsigned char *buf, int num)
{
Utils::getSecureRandom(buf,num);
return 1;
}
static RAND_METHOD _zeroTierRandMethod = {
_zeroTier_rand_seed,
_zeroTier_rand_bytes,
_zeroTier_rand_cleanup,
_zeroTier_rand_add,
_zeroTier_rand_bytes,
_zeroTier_rand_status
};
static void _initLibCrypto()
{
RAND_set_rand_method(&_zeroTierRandMethod);
}
// ---------------------------------------------------------------------------
static Node *node = (Node *)0;
static void printHelp(const char *cn,FILE *out)
{
fprintf(out,"ZeroTier One version %d.%d.%d\n(c)2012-2013 ZeroTier Networks LLC\nLicensed under the GNU General Public License v3\n\nUsage: %s <home directory>\n",Node::versionMajor(),Node::versionMinor(),Node::versionRevision(),cn);
}
#ifndef _WIN32
static void sighandlerQuit(int sig)
{
Node *n = node;
if (n)
n->terminate();
else exit(0);
}
#endif
int main(int argc,char **argv)
{
#ifndef _WIN32
signal(SIGHUP,SIG_IGN);
signal(SIGPIPE,SIG_IGN);
signal(SIGUSR1,SIG_IGN);
signal(SIGUSR2,SIG_IGN);
signal(SIGALRM,SIG_IGN);
signal(SIGINT,&sighandlerQuit);
signal(SIGTERM,&sighandlerQuit);
signal(SIGQUIT,&sighandlerQuit);
#endif
_initLibCrypto();
if (argc < 2) {
printHelp(argv[0],stderr);
return ZT_EXEC_RETURN_VALUE_NORMAL_TERMINATION;
}
const char *homeDir = (const char *)0;
for(int i=1;i<argc;++i) {
if (argv[i][0] == '-') {
switch(argv[i][1]) {
default:
printHelp(argv[0],stderr);
return ZT_EXEC_RETURN_VALUE_NORMAL_TERMINATION;
}
} else {
if (homeDir) {
printHelp(argv[0],stderr);
return ZT_EXEC_RETURN_VALUE_NORMAL_TERMINATION;
}
homeDir = argv[i];
break;
}
}
if ((!homeDir)||(strlen(homeDir) <= 0)) {
printHelp(argv[0],stderr);
return ZT_EXEC_RETURN_VALUE_NORMAL_TERMINATION;
}
#ifndef _WIN32
mkdir(homeDir,0755); // will fail if it already exists
#endif
int exitCode = ZT_EXEC_RETURN_VALUE_NORMAL_TERMINATION;
node = new Node(homeDir);
const char *termReason = (char *)0;
switch(node->run()) {
case Node::NODE_RESTART_FOR_RECONFIGURATION:
exitCode = ZT_EXEC_RETURN_VALUE_PLEASE_RESTART;
break;
case Node::NODE_UNRECOVERABLE_ERROR:
exitCode = ZT_EXEC_RETURN_VALUE_UNRECOVERABLE_ERROR;
termReason = node->reasonForTermination();
fprintf(stderr,"%s: abnormal termination: %s\n",argv[0],(termReason) ? termReason : "(unknown reason)");
break;
case Node::NODE_NEW_VERSION_AVAILABLE:
exitCode = ZT_EXEC_RETURN_VALUE_TERMINATED_FOR_UPGRADE;
break;
default:
break;
}
delete node;
node = (Node *)0;
return exitCode;
}
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