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|
/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* Anytun 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 anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#include <iostream>
#include <queue>
#include <string>
#include <sstream>
#include <cstring>
#include "datatypes.h"
#include "options.h"
#include "log.h"
Options* Options::inst = NULL;
Mutex Options::instMutex;
Options& gOpt = Options::instance();
Options& Options::instance()
{
Lock lock(instMutex);
static instanceCleaner c;
if(!inst)
inst = new Options();
return *inst;
}
Options::Options() : key_(u_int32_t(0)), salt_(u_int32_t(0))
{
progname_ = "anytun";
daemonize_ = true;
chroot_ = false;
username_ = "nobody";
chroot_dir_ = "/var/run/anytun";
pid_file_ = "";
sender_id_ = 0;
local_addr_ = "";
local_port_ = "4444";
local_sync_port_ = "";
remote_sync_port_ = "";
remote_sync_addr_ = "";
remote_addr_ = "";
remote_port_ = "4444";
dev_name_ = "";
dev_type_ = "";
ifconfig_param_local_ = "";
ifconfig_param_remote_netmask_ = "";
post_up_script_ = "";
seq_window_size_ = 100;
cipher_ = "aes-ctr";
kd_prf_ = "aes-ctr";
ld_kdr_ = 0;
auth_algo_ = "sha1";
mux_ = 0;
}
Options::~Options()
{
}
#define PARSE_BOOL_PARAM(SHORT, LONG, VALUE) \
else if(str == SHORT || str == LONG) \
VALUE = true;
#define PARSE_INVERSE_BOOL_PARAM(SHORT, LONG, VALUE) \
else if(str == SHORT || str == LONG) \
VALUE = false;
#define PARSE_SIGNED_INT_PARAM(SHORT, LONG, VALUE) \
else if(str == SHORT || str == LONG) \
{ \
if(argc < 1) \
return i; \
std::stringstream tmp; \
tmp << argv[i+1]; \
tmp >> VALUE; \
argc--; \
i++; \
}
#define PARSE_SCALAR_PARAM(SHORT, LONG, VALUE) \
else if(str == SHORT || str == LONG) \
{ \
if(argc < 1 || argv[i+1][0] == '-') \
return i; \
std::stringstream tmp; \
tmp << argv[i+1]; \
tmp >> VALUE; \
argc--; \
i++; \
}
#define PARSE_SCALAR_PARAM2(SHORT, LONG, VALUE1, VALUE2) \
else if(str == SHORT || str == LONG) \
{ \
if(argc < 2 || \
argv[i+1][0] == '-' || argv[i+2][0] == '-') \
return i; \
std::stringstream tmp; \
tmp << argv[i+1] << " " << argv[i+2]; \
tmp >> VALUE1; \
tmp >> VALUE2; \
argc-=2; \
i+=2; \
}
#define PARSE_HEXSTRING_PARAM_SEC(SHORT, LONG, VALUE) \
else if(str == SHORT || str == LONG) \
{ \
if(argc < 1 || argv[i+1][0] == '-') \
return i; \
VALUE = Buffer(std::string(argv[i+1])); \
for(size_t j=0; j < strlen(argv[i+1]); ++j) \
argv[i+1][j] = '#'; \
argc--; \
i++; \
}
#define PARSE_CSLIST_PARAM(SHORT, LONG, LIST) \
else if(str == SHORT || str == LONG) \
{ \
if(argc < 1 || argv[i+1][0] == '-') \
return i; \
std::stringstream tmp(argv[i+1]); \
while (tmp.good()) \
{ \
std::string tmp_line; \
getline(tmp,tmp_line,','); \
LIST.push(tmp_line); \
} \
argc--; \
i++; \
}
int32_t Options::parse(int argc, char* argv[])
{
Lock lock(mutex);
progname_ = argv[0];
argc--;
std::queue<std::string> route_queue;
std::queue<std::string> host_port_queue;
int32_t ld_kdr_tmp = ld_kdr_;
for(int i=1; argc > 0; ++i)
{
std::string str(argv[i]);
argc--;
if(str == "-h" || str == "--help")
return -1;
PARSE_INVERSE_BOOL_PARAM("-D","--nodaemonize", daemonize_)
PARSE_BOOL_PARAM("-C","--chroot", chroot_)
PARSE_SCALAR_PARAM("-u","--username", username_)
PARSE_SCALAR_PARAM("-H","--chroot-dir", chroot_dir_)
PARSE_SCALAR_PARAM("-P","--write-pid", pid_file_)
PARSE_SCALAR_PARAM("-i","--interface", local_addr_)
PARSE_SCALAR_PARAM("-p","--port", local_port_)
PARSE_SCALAR_PARAM("-S","--sync-port", local_sync_port_)
PARSE_SCALAR_PARAM("-I","--sync-interface", local_sync_addr_)
PARSE_SCALAR_PARAM("-R","--remote-sync-host", remote_sync_addr_)
PARSE_SCALAR_PARAM("-O","--remote-sync-port", remote_sync_port_)
PARSE_SCALAR_PARAM("-r","--remote-host", remote_addr_)
PARSE_SCALAR_PARAM("-o","--remote-port", remote_port_)
PARSE_SCALAR_PARAM("-d","--dev", dev_name_)
PARSE_SCALAR_PARAM("-t","--type", dev_type_)
PARSE_SCALAR_PARAM2("-n","--ifconfig", ifconfig_param_local_, ifconfig_param_remote_netmask_)
PARSE_SCALAR_PARAM("-x","--post-up-script", post_up_script_)
PARSE_SCALAR_PARAM("-s","--sender-id", sender_id_)
PARSE_SCALAR_PARAM("-m","--mux", mux_)
PARSE_SCALAR_PARAM("-w","--window-size", seq_window_size_)
PARSE_CSLIST_PARAM("-M","--sync-hosts", host_port_queue)
PARSE_CSLIST_PARAM("-X","--control-host", host_port_queue)
PARSE_CSLIST_PARAM("-T","--route", route_queue)
PARSE_SCALAR_PARAM("-c","--cipher", cipher_)
PARSE_SCALAR_PARAM("-k","--kd-prf", kd_prf_)
PARSE_SIGNED_INT_PARAM("-l","--ld-kdr", ld_kdr_tmp)
PARSE_SCALAR_PARAM("-a","--auth-algo", auth_algo_)
PARSE_HEXSTRING_PARAM_SEC("-K","--key", key_)
PARSE_HEXSTRING_PARAM_SEC("-A","--salt", salt_)
else
return i;
}
ld_kdr_ = ld_kdr_tmp;
if(cipher_ == "null" && auth_algo_ == "null")
kd_prf_ = "null";
if((cipher_ != "null" || auth_algo_ != "null") && kd_prf_ == "null")
cLog.msg(Log::PRIO_WARNING) << "using NULL key derivation with encryption and or authentication enabled!";
if(dev_name_ == "" && dev_type_ == "")
dev_type_ = "tun";
while(!host_port_queue.empty())
{
bool ret = splitAndAddHostPort(host_port_queue.front(), connect_to_);
if(!ret) return -2;
host_port_queue.pop();
}
while(!route_queue.empty())
{
std::stringstream tmp_stream(route_queue.front());
OptionRoute rt;
getline(tmp_stream,rt.net_addr,'/');
if(!tmp_stream.good())
return false;
tmp_stream >> rt.prefix_length;
route_queue.pop();
routes_.push_back(rt);
}
return 0;
}
bool Options::splitAndAddHostPort(std::string hostPort, ConnectToList& list)
{
OptionConnectTo oct;
size_t pos = hostPort.find_first_of("[");
if(pos != std::string::npos && pos != 0)
return false; // an [ was found but not at the beginning
bool hasPort = false;
if(pos != std::string::npos) {
hostPort.erase(pos, 1);
pos = hostPort.find_first_of("]");
if(pos == std::string::npos)
return false; // no trailing ] although an leading [ was found
if(pos < hostPort.length()-2) {
if(hostPort[pos+1] != ':')
return false; // wrong port delimieter
hostPort[pos+1] = '/';
hasPort = true;
}
else if(pos != hostPort.length()-1)
return false; // to few characters left
hostPort.erase(pos, 1);
}
else {
pos = hostPort.find_first_of(":");
if(pos != std::string::npos && pos == hostPort.find_last_of(":")) {
// an ':' has been found and it is the only one -> assuming port present
hasPort = true;
hostPort[pos] = '/';
}
}
if(hasPort) {
std::stringstream tmp_stream(hostPort);
getline(tmp_stream,oct.host,'/');
if(!tmp_stream.good())
return false;
tmp_stream >> oct.port;
}
else {
oct.host = hostPort;
oct.port = "2323"; // default sync port
}
list.push_back(oct);
return true;
}
void Options::printUsage()
{
std::cout << "USAGE:" << std::endl;
std::cout << "anytun [-h|--help] prints this..." << std::endl;
// std::cout << " [-f|--config] <file> the config file" << std::endl;
std::cout << " [-D|--nodaemonize] don't run in background" << std::endl;
std::cout << " [-C|--chroot] chroot and drop privileges" << std::endl;
std::cout << " [-u|--username] <username> if chroot change to this user" << std::endl;
std::cout << " [-H|--chroot-dir] <path> chroot to this directory" << std::endl;
std::cout << " [-P|--write-pid] <path> write pid to this file" << std::endl;
std::cout << " [-i|--interface] <ip-address> local anycast ip address to bind to" << std::endl;
std::cout << " [-p|--port] <port> local anycast(data) port to bind to" << std::endl;
std::cout << " [-I|--sync-interface] <ip-address> local unicast(sync) ip address to bind to" << std::endl;
std::cout << " [-S|--sync-port] <port> local unicast(sync) port to bind to" << std::endl;
std::cout << " [-M|--sync-hosts] <hostname|ip>[:<port>][,<hostname|ip>[:<port>][...]]"<< std::endl;
std::cout << " remote hosts to sync with" << std::endl;
std::cout << " [-X|--control-host] <hostname|ip>[:<port>]"<< std::endl;
std::cout << " fetch the config from this host" << std::endl;
std::cout << " [-r|--remote-host] <hostname|ip> remote host" << std::endl;
std::cout << " [-o|--remote-port] <port> remote port" << std::endl;
std::cout << " [-d|--dev] <name> device name" << std::endl;
std::cout << " [-t|--type] <tun|tap> device type" << std::endl;
std::cout << " [-n|--ifconfig] <local> the local address for the tun/tap device" << std::endl
<< " <remote|netmask> the remote address(tun) or netmask(tap)" << std::endl;
std::cout << " [-x|--post-up-script] <script> script gets called after interface is created" << std::endl;
std::cout << " [-s|--sender-id ] <sender id> the sender id to use" << std::endl;
std::cout << " [-m|--mux] <mux-id> the multiplex id to use" << std::endl;
std::cout << " [-w|--window-size] <window size> seqence number window size" << std::endl;
std::cout << " [-c|--cipher] <cipher type> payload encryption algorithm" << std::endl;
std::cout << " [-K|--key] <master key> master key to use for encryption" << std::endl;
std::cout << " [-A|--salt] <master salt> master salt to use for encryption" << std::endl;
std::cout << " [-k|--kd-prf] <kd-prf type> key derivation pseudo random function" << std::endl;
std::cout << " [-l|--ld-kdr] <ld-kdr> log2 of key derivation rate" << std::endl;
std::cout << " [-a|--auth-algo] <algo type> message authentication algorithm" << std::endl;
std::cout << " [-T|--route] <net>/<prefix length> add a route to connection, can be invoked several times" << std::endl;
}
void Options::printOptions()
{
Lock lock(mutex);
std::cout << "Options:" << std::endl;
std::cout << "daemonize=" << daemonize_ << std::endl;
std::cout << "chroot=" << chroot_ << std::endl;
std::cout << "username='" << username_ << "'" << std::endl;
std::cout << "chroot_dir='" << chroot_dir_ << "'" << std::endl;
std::cout << "pid_file='" << pid_file_ << "'" << std::endl;
std::cout << "sender_id='" << sender_id_ << "'" << std::endl;
std::cout << "local_addr='" << local_addr_ << "'" << std::endl;
std::cout << "local_port='" << local_port_ << "'" << std::endl;
std::cout << "local_sync_addr='" << local_sync_addr_ << "'" << std::endl;
std::cout << "local_sync_port='" << local_sync_port_ << "'" << std::endl;
std::cout << "remote_addr='" << remote_addr_ << "'" << std::endl;
std::cout << "remote_port='" << remote_port_ << "'" << std::endl;
std::cout << "dev_name='" << dev_name_ << "'" << std::endl;
std::cout << "dev_type='" << dev_type_ << "'" << std::endl;
std::cout << "ifconfig_param_local='" << ifconfig_param_local_ << "'" << std::endl;
std::cout << "ifconfig_param_remote_netmask='" << ifconfig_param_remote_netmask_ << "'" << std::endl;
std::cout << "post_up_script='" << post_up_script_ << "'" << std::endl;
std::cout << "seq_window_size='" << seq_window_size_ << "'" << std::endl;
std::cout << "mux_id=" << mux_ << std::endl;
std::cout << "cipher='" << cipher_ << "'" << std::endl;
std::cout << "key=" << key_.getHexDumpOneLine() << std::endl;
std::cout << "salt=" << salt_.getHexDumpOneLine() << std::endl;
std::cout << "kd_prf='" << kd_prf_ << "'" << std::endl;
std::cout << "ld_kdr=" << static_cast<int32_t>(ld_kdr_) << std::endl;
std::cout << "auth_algo='" << auth_algo_ << "'" << std::endl;
std::cout << "connect_to=";
ConnectToList::const_iterator it = connect_to_.begin();
for(; it != connect_to_.end(); ++it)
std::cout << "'" << it->host << "','" << it->port << "';";
std::cout << std::endl;
std::cout << "routes:" << std::endl;
RouteList::const_iterator rit;
for(rit = routes_.begin(); rit != routes_.end(); ++rit)
std::cout << " " << rit->net_addr << "/" << rit->prefix_length << std::endl;
}
std::string Options::getProgname()
{
Lock lock(mutex);
return progname_;
}
Options& Options::setProgname(std::string p)
{
Lock lock(mutex);
progname_ = p;
return *this;
}
bool Options::getDaemonize()
{
return daemonize_;
}
Options& Options::setDaemonize(bool d)
{
daemonize_ = d;
return *this;
}
bool Options::getChroot()
{
return chroot_;
}
Options& Options::setChroot(bool c)
{
chroot_ = c;
return *this;
}
std::string Options::getUsername()
{
Lock lock(mutex);
return username_;
}
Options& Options::setUsername(std::string u)
{
Lock lock(mutex);
username_ = u;
return *this;
}
std::string Options::getChrootDir()
{
Lock lock(mutex);
return chroot_dir_;
}
Options& Options::setChrootDir(std::string c)
{
Lock lock(mutex);
chroot_dir_ = c;
return *this;
}
std::string Options::getPidFile()
{
Lock lock(mutex);
return pid_file_;
}
Options& Options::setPidFile(std::string p)
{
Lock lock(mutex);
pid_file_ = p;
return *this;
}
ConnectToList Options::getConnectTo()
{
Lock lock(mutex);
return connect_to_;
}
sender_id_t Options::getSenderId()
{
return sender_id_;
}
Options& Options::setSenderId(sender_id_t s)
{
sender_id_ = s;
return *this;
}
std::string Options::getLocalAddr()
{
Lock lock(mutex);
return local_addr_;
}
Options& Options::setLocalAddr(std::string l)
{
Lock lock(mutex);
local_addr_ = l;
return *this;
}
std::string Options::getLocalSyncAddr()
{
Lock lock(mutex);
return local_sync_addr_;
}
Options& Options::setLocalSyncAddr(std::string l)
{
Lock lock(mutex);
local_sync_addr_ = l;
return *this;
}
std::string Options::getLocalPort()
{
return local_port_;
}
Options& Options::setLocalPort(std::string l)
{
local_port_ = l;
return *this;
}
std::string Options::getLocalSyncPort()
{
return local_sync_port_;
}
Options& Options::setLocalSyncPort(std::string l)
{
local_sync_port_ = l;
return *this;
}
std::string Options::getRemoteSyncPort()
{
return remote_sync_port_;
}
Options& Options::setRemoteSyncPort(std::string l)
{
remote_sync_port_ = l;
return *this;
}
std::string Options::getRemoteSyncAddr()
{
Lock lock(mutex);
return remote_sync_addr_;
}
Options& Options::setRemoteSyncAddr(std::string r)
{
Lock lock(mutex);
remote_sync_addr_ = r;
return *this;
}
std::string Options::getRemoteAddr()
{
Lock lock(mutex);
return remote_addr_;
}
Options& Options::setRemoteAddr(std::string r)
{
Lock lock(mutex);
remote_addr_ = r;
return *this;
}
std::string Options::getRemotePort()
{
return remote_port_;
}
Options& Options::setRemotePort(std::string r)
{
remote_port_ = r;
return *this;
}
Options& Options::setRemoteAddrPort(std::string addr, std::string port)
{
Lock lock(mutex);
remote_addr_ = addr;
remote_port_ = port;
return *this;
}
std::string Options::getDevName()
{
Lock lock(mutex);
return dev_name_;
}
std::string Options::getDevType()
{
Lock lock(mutex);
return dev_type_;
}
Options& Options::setDevName(std::string d)
{
Lock lock(mutex);
dev_name_ = d;
return *this;
}
Options& Options::setDevType(std::string d)
{
Lock lock(mutex);
dev_type_ = d;
return *this;
}
std::string Options::getIfconfigParamLocal()
{
Lock lock(mutex);
return ifconfig_param_local_;
}
Options& Options::setIfconfigParamLocal(std::string i)
{
Lock lock(mutex);
ifconfig_param_local_ = i;
return *this;
}
std::string Options::getIfconfigParamRemoteNetmask()
{
Lock lock(mutex);
return ifconfig_param_remote_netmask_;
}
Options& Options::setIfconfigParamRemoteNetmask(std::string i)
{
Lock lock(mutex);
ifconfig_param_remote_netmask_ = i;
return *this;
}
std::string Options::getPostUpScript()
{
Lock lock(mutex);
return post_up_script_;
}
Options& Options::setPostUpScript(std::string p)
{
Lock lock(mutex);
post_up_script_ = p;
return *this;
}
window_size_t Options::getSeqWindowSize()
{
return seq_window_size_;
}
Options& Options::setSeqWindowSize(window_size_t s)
{
seq_window_size_ = s;
return *this;
}
std::string Options::getCipher()
{
Lock lock(mutex);
return cipher_;
}
Options& Options::setCipher(std::string c)
{
Lock lock(mutex);
cipher_ = c;
return *this;
}
std::string Options::getKdPrf()
{
Lock lock(mutex);
return kd_prf_;
}
Options& Options::setKdPrf(std::string k)
{
Lock lock(mutex);
kd_prf_ = k;
return *this;
}
int8_t Options::getLdKdr()
{
Lock lock(mutex);
return ld_kdr_;
}
Options& Options::setLdKdr(int8_t l)
{
Lock lock(mutex);
ld_kdr_ = l;
return *this;
}
std::string Options::getAuthAlgo()
{
Lock lock(mutex);
return auth_algo_;
}
Options& Options::setAuthAlgo(std::string a)
{
Lock lock(mutex);
auth_algo_ = a;
return *this;
}
mux_t Options::getMux()
{
Lock lock(mutex);
return mux_;
}
Options& Options::setMux(mux_t m)
{
Lock lock(mutex);
mux_ = m;
return *this;
}
Buffer Options::getKey()
{
Lock lock(mutex);
return key_;
}
Options& Options::setKey(std::string k)
{
Lock lock(mutex);
key_ = k;
return *this;
}
Buffer Options::getSalt()
{
Lock lock(mutex);
return salt_;
}
Options& Options::setSalt(std::string s)
{
Lock lock(mutex);
salt_ = s;
return *this;
}
RouteList Options::getRoutes()
{
Lock lock(mutex);
return routes_;
}
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