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cli.cpp
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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012-2022 OpenVPN Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License Version 3
// as published by the Free Software Foundation.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program in the COPYING file.
// If not, see <http://www.gnu.org/licenses/>.
// OpenVPN 3 test client
#include <stdlib.h>
#include <string>
#include <iostream>
#include <thread>
#include <memory>
#include <mutex>
#include <openvpn/common/platform.hpp>
#ifdef OPENVPN_PLATFORM_MAC
#include <CoreFoundation/CFBundle.h>
#include <ApplicationServices/ApplicationServices.h>
#endif
// If enabled, don't direct ovpn3 core logging to
// ClientAPI::OpenVPNClient::log() virtual method.
// Instead, logging will go to LogBaseSimple::log().
// In this case, make sure to define:
// LogBaseSimple log;
// at the top of your main() function to receive
// log messages from all threads.
// Also, note that the OPENVPN_LOG_GLOBAL setting
// MUST be consistent across all compilation units.
#ifdef OPENVPN_USE_LOG_BASE_SIMPLE
#define OPENVPN_LOG_GLOBAL // use global rather than thread-local log object pointer
#include <openvpn/log/logbasesimple.hpp>
#endif
// don't export core symbols
#define OPENVPN_CORE_API_VISIBILITY_HIDDEN
// use SITNL on Linux by default
#if defined(OPENVPN_PLATFORM_LINUX) && !defined(OPENVPN_USE_IPROUTE2) && !defined(OPENVPN_USE_SITNL)
#define OPENVPN_USE_SITNL
#endif
// should be included before other openvpn includes,
// with the exception of openvpn/log includes
#include <client/ovpncli.cpp>
#include <openvpn/common/exception.hpp>
#include <openvpn/common/string.hpp>
#include <openvpn/common/signal.hpp>
#include <openvpn/common/file.hpp>
#include <openvpn/common/getopt.hpp>
#include <openvpn/common/getpw.hpp>
#include <openvpn/common/cleanup.hpp>
#include <openvpn/time/timestr.hpp>
#include <openvpn/ssl/peerinfo.hpp>
#include <openvpn/ssl/sslchoose.hpp>
#ifdef OPENVPN_REMOTE_OVERRIDE
#include <openvpn/common/process.hpp>
#endif
#if defined(USE_MBEDTLS)
#include <openvpn/mbedtls/util/pkcs1.hpp>
#elif defined(USE_OPENSSL)
#include <openssl/evp.h>
#if (OPENSSL_VERSION_NUMBER >= 0x30000000L)
#include <openssl/core_names.h>
#endif
#endif
#if defined(OPENVPN_PLATFORM_WIN)
#include <openvpn/win/console.hpp>
#include <shellapi.h>
#endif
#ifdef USE_NETCFG
#include "client/core-client-netcfg.hpp"
#endif
#if defined(OPENVPN_PLATFORM_LINUX)
#include <openvpn/tun/linux/client/tuncli.hpp>
// we use a static polymorphism and define a
// platform-specific TunSetup class, responsible
// for setting up tun device
#define TUN_CLASS_SETUP TunLinuxSetup::Setup<TUN_LINUX>
#include <openvpn/tun/linux/client/tuncli.hpp>
#elif defined(OPENVPN_PLATFORM_MAC)
#include <openvpn/tun/mac/client/tuncli.hpp>
#define TUN_CLASS_SETUP TunMac::Setup
#endif
using namespace openvpn;
namespace {
OPENVPN_SIMPLE_EXCEPTION(usage);
}
#ifdef USE_TUN_BUILDER
class ClientBase : public ClientAPI::OpenVPNClient
{
public:
bool tun_builder_new() override
{
tbc.tun_builder_set_mtu(1500);
return true;
}
int tun_builder_establish() override
{
if (!tun)
{
tun.reset(new TUN_CLASS_SETUP());
}
TUN_CLASS_SETUP::Config config;
config.layer = Layer(Layer::Type::OSI_LAYER_3);
// no need to add bypass routes on establish since we do it on socket_protect
config.add_bypass_routes_on_establish = false;
return tun->establish(tbc, &config, nullptr, std::cout);
}
bool tun_builder_add_address(const std::string& address,
int prefix_length,
const std::string& gateway, // optional
bool ipv6,
bool net30) override
{
return tbc.tun_builder_add_address(address, prefix_length, gateway, ipv6, net30);
}
bool tun_builder_add_route(const std::string& address,
int prefix_length,
int metric,
bool ipv6) override
{
return tbc.tun_builder_add_route(address, prefix_length, metric, ipv6);
}
bool tun_builder_reroute_gw(bool ipv4,
bool ipv6,
unsigned int flags) override
{
return tbc.tun_builder_reroute_gw(ipv4, ipv6, flags);
}
bool tun_builder_set_remote_address(const std::string& address,
bool ipv6) override
{
return tbc.tun_builder_set_remote_address(address, ipv6);
}
bool tun_builder_set_session_name(const std::string& name) override
{
return tbc.tun_builder_set_session_name(name);
}
bool tun_builder_add_dns_server(const std::string& address, bool ipv6) override
{
return tbc.tun_builder_add_dns_server(address, ipv6);
}
void tun_builder_teardown(bool disconnect) override
{
std::ostringstream os;
auto os_print = Cleanup([&os](){ OPENVPN_LOG_STRING(os.str()); });
tun->destroy(os);
}
bool socket_protect(int socket, std::string remote, bool ipv6) override
{
(void)socket;
std::ostringstream os;
auto os_print = Cleanup([&os](){ OPENVPN_LOG_STRING(os.str()); });
return tun->add_bypass_route(remote, ipv6, os);
}
private:
TUN_CLASS_SETUP::Ptr tun = new TUN_CLASS_SETUP();
TunBuilderCapture tbc;
};
#else // USE_TUN_BUILDER
class ClientBase : public ClientAPI::OpenVPNClient
{
public:
bool socket_protect(int socket, std::string remote, bool ipv6) override
{
std::cout << "NOT IMPLEMENTED: *** socket_protect " << socket << " " << remote << std::endl;
return true;
}
};
#endif
class Client : public ClientBase
{
public:
enum ClockTickAction {
CT_UNDEF,
CT_STOP,
CT_RECONNECT,
CT_PAUSE,
CT_RESUME,
CT_STATS,
};
bool is_dynamic_challenge() const
{
return !dc_cookie.empty();
}
std::string dynamic_challenge_cookie()
{
return dc_cookie;
}
std::string epki_ca;
std::string epki_cert;
#if defined(USE_MBEDTLS)
MbedTLSPKI::PKContext epki_ctx; // external PKI context
#elif defined(USE_OPENSSL)
openvpn::OpenSSLPKI::PKey epki_pkey;
#endif
void set_clock_tick_action(const ClockTickAction action)
{
clock_tick_action = action;
}
void print_stats()
{
const int n = stats_n();
std::vector<long long> stats = stats_bundle();
std::cout << "STATS:" << std::endl;
for (int i = 0; i < n; ++i)
{
const long long value = stats[i];
if (value)
std::cout << " " << stats_name(i) << " : " << value << std::endl;
}
}
#ifdef OPENVPN_REMOTE_OVERRIDE
void set_remote_override_cmd(const std::string& cmd)
{
remote_override_cmd = cmd;
}
#endif
void set_write_url_fn(const std::string& fn)
{
write_url_fn = fn;
}
private:
virtual void event(const ClientAPI::Event& ev) override
{
std::cout << date_time() << " EVENT: " << ev.name;
if (!ev.info.empty())
std::cout << ' ' << ev.info;
if (ev.fatal)
std::cout << " [FATAL-ERR]";
else if (ev.error)
std::cout << " [ERR]";
std::cout << std::endl;
if (ev.name == "DYNAMIC_CHALLENGE")
{
dc_cookie = ev.info;
ClientAPI::DynamicChallenge dc;
if (ClientAPI::OpenVPNClientHelper::parse_dynamic_challenge(ev.info, dc)) {
std::cout << "DYNAMIC CHALLENGE" << std::endl;
std::cout << "challenge: " << dc.challenge << std::endl;
std::cout << "echo: " << dc.echo << std::endl;
std::cout << "responseRequired: " << dc.responseRequired << std::endl;
std::cout << "stateID: " << dc.stateID << std::endl;
}
}
else if (ev.name == "PROXY_NEED_CREDS")
{
std::cout << "PROXY_NEED_CREDS " << ev.info << std::endl;
}
else if (ev.name == "INFO")
{
if (string::starts_with(ev.info, "OPEN_URL:"))
{
open_url(ev.info.substr(9), "");
}
else if (string::starts_with(ev.info, "WEB_AUTH:"))
{
auto extra = ev.info.substr(9);
size_t flagsend = extra.find(':');
if (flagsend != std::string::npos)
{
auto flags = extra.substr(0, flagsend);
auto url = extra.substr(flagsend + 1);
open_url(url, flags);
}
}
else if (string::starts_with(ev.info, "CR_TEXT:"))
{
std::string cr_response;
std::cout << "\n\n" << ev.info.substr(8) << ": ";
std::getline(std::cin, cr_response);
post_cc_msg("CR_RESPONSE," + base64->encode(cr_response));
}
}
}
void open_url(std::string url_str, std::string flags)
{
if (string::starts_with(url_str, "http://")
|| string::starts_with(url_str, "https://"))
{
if (!write_url_fn.empty())
{
write_string(write_url_fn, url_str + '\n');
return;
}
#ifdef OPENVPN_PLATFORM_MAC
std::thread thr([url_str]()
{
CFURLRef url = CFURLCreateWithBytes(
NULL, // allocator
(UInt8*) url_str.c_str(), // URLBytes
url_str.length(), // length
kCFStringEncodingUTF8, // encoding
NULL // baseURL
);
LSOpenCFURLRef(url, 0);
CFRelease(url);
});
thr.detach();
#elif defined(OPENVPN_PLATFORM_TYPE_UNIX)
Argv argv;
if (::getuid() == 0 && ::getenv("SUDO_USER"))
{
argv.emplace_back("/usr/sbin/runuser");
argv.emplace_back("-u");
argv.emplace_back(::getenv("SUDO_USER"));
}
argv.emplace_back("/usr/bin/xdg-open");
argv.emplace_back(url_str);
system_cmd(argv);
#else
std::cout << "No implementation to launch " << url_str << std::endl;
#endif
}
}
virtual void log(const ClientAPI::LogInfo& log) override
{
std::lock_guard<std::mutex> lock(log_mutex);
std::cout << date_time() << ' ' << log.text << std::flush;
}
virtual void clock_tick() override
{
const ClockTickAction action = clock_tick_action;
clock_tick_action = CT_UNDEF;
switch (action)
{
case CT_STOP:
std::cout << "signal: CT_STOP" << std::endl;
stop();
break;
case CT_RECONNECT:
std::cout << "signal: CT_RECONNECT" << std::endl;
reconnect(0);
break;
case CT_PAUSE:
std::cout << "signal: CT_PAUSE" << std::endl;
pause("clock-tick pause");
break;
case CT_RESUME:
std::cout << "signal: CT_RESUME" << std::endl;
resume();
break;
case CT_STATS:
std::cout << "signal: CT_STATS" << std::endl;
print_stats();
break;
default:
break;
}
}
virtual void external_pki_cert_request(ClientAPI::ExternalPKICertRequest& certreq) override
{
if (!epki_cert.empty())
{
certreq.cert = epki_cert;
certreq.supportingChain = epki_ca;
}
else
{
certreq.error = true;
certreq.errorText = "external_pki_cert_request not implemented";
}
}
#ifdef USE_OPENSSL
void doOpenSSLSignature(ClientAPI::ExternalPKISignRequest &signreq) const
{
using PKEY_CTX_unique_ptr = std::unique_ptr<::EVP_PKEY_CTX, decltype(&::EVP_PKEY_CTX_free)>;
BufferAllocated signdata(256, BufferAllocated::GROW);
base64->decode(signdata, signreq.data);
EVP_PKEY* pkey = epki_pkey.obj();
PKEY_CTX_unique_ptr pkey_ctx(EVP_PKEY_CTX_new(pkey, nullptr), EVP_PKEY_CTX_free);
if(!(pkey_ctx))
throw Exception("epki_sign failed, error creating PKEY ctx");
if ((EVP_PKEY_sign_init(pkey_ctx.get()) < 0))
{
throw Exception("epki_sign failed, error in EVP_PKEY_sign_init: " + openssl_error());
}
if (signreq.algorithm == "RSA_PKCS1_PSS_PADDING")
{
EVP_PKEY_CTX_set_rsa_padding(pkey_ctx.get(), RSA_PKCS1_PSS_PADDING);
}
else if (signreq.algorithm == "RSA_PKCS1_PADDING")
{
EVP_PKEY_CTX_set_rsa_padding(pkey_ctx.get(), RSA_PKCS1_PADDING);
}
else if (signreq.algorithm == "RSA_NO_PADDING")
{
EVP_PKEY_CTX_set_rsa_padding(pkey_ctx.get(), RSA_NO_PADDING);
}
/* determine the output length */
size_t outlen;
if ((EVP_PKEY_sign(pkey_ctx.get(), nullptr, &outlen, signdata.c_data(), signdata.size())) < 0)
{
throw Exception("epki_sign failed, error signing data: " + openssl_error());
}
BufferAllocated sig(outlen, BufferAllocated::ARRAY);
if ((EVP_PKEY_sign(pkey_ctx.get(), sig.data(), &outlen, signdata.c_data(), signdata.size())) < 0)
{
throw Exception("epki_sign failed, error signing data: " + openssl_error());
}
sig.set_size(outlen);
signreq.sig = base64->encode(sig);
OPENVPN_LOG("SIGNATURE[" << outlen << "]: " << signreq.sig);
}
#if (OPENSSL_VERSION_NUMBER < 0x30000000L)
void doOpenSSLDigestSignature(ClientAPI::ExternalPKISignRequest &signreq)
{
/* technically implementing this without OpenSSL 3.0 is possible but
* only the xkey_provider implementation for OpenSSL 3.0 requires this,
* so in the cli.cpp, which is only a test cient, we skip this extra
* effort and just use only the modern APIs in doOpenSSLDigestSignature
*/
throw Exception("epki_sign failed, digest sign only implemented in OpenSSL 3.0");
}
#else
void doOpenSSLDigestSignature(ClientAPI::ExternalPKISignRequest &signreq)
{
EVP_PKEY_CTX* pkey_ctx = nullptr;
BufferAllocated signdata(256, BufferAllocated::GROW);
base64->decode(signdata, signreq.data);
using MD_unique_ptr = std::unique_ptr<::EVP_MD_CTX, decltype(&::EVP_MD_CTX_free)>;
MD_unique_ptr md(EVP_MD_CTX_new(), EVP_MD_CTX_free);
if(!md)
throw Exception("epki_sign failed, error creating MD ctx");
if (!signreq.saltlen.empty() && signreq.saltlen != "digest")
{
throw Exception("epki_sign failed, only padding=digest supported" + openssl_error());
}
const char *padding = "none";
if (signreq.algorithm == "RSA_PKCS1_PSS_PADDING")
{
padding = "pss";
}
else if (signreq.algorithm == "RSA_PKCS1_PADDING")
{
padding = "pkcs1";
}
else if (signreq.algorithm == "RSA_NO_PADDING")
{
padding = "none";
}
EVP_PKEY* pkey = epki_pkey.obj();
OSSL_PARAM params[6] = {OSSL_PARAM_END};
char *hashalg = const_cast<char *>(signreq.hashalg.c_str());
if (signreq.hashalg == "none")
hashalg = nullptr;
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, hashalg, 0);
params[1] = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_PAD_MODE, const_cast<char *>(padding), 0);
if (EVP_PKEY_get_id(pkey) == EVP_PKEY_RSA && !signreq.saltlen.empty())
{
/* The strings are used const in OpenSSL but the API definition has char * */
char *saltlen = const_cast<char *>(signreq.saltlen.c_str());
params[2] = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, saltlen, 0);
params[3] = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, hashalg, 0);
params[4] = OSSL_PARAM_construct_end();
}
EVP_DigestSignInit_ex(md.get(), &pkey_ctx, hashalg, nullptr,
nullptr, pkey, params);
/* determine the output length */
size_t outlen;
if (EVP_DigestSign(md.get(), nullptr, &outlen, signdata.data(), signdata.size()) < 0)
{
throw Exception("epki_sign failed, error signing data: " + openssl_error());
}
BufferAllocated sig(outlen, BufferAllocated::ARRAY);
if (EVP_DigestSign(md.get(), sig.data(), &outlen, signdata.data(), signdata.size()) < 0)
{
throw Exception("epki_sign failed, error signing data: " + openssl_error());
}
sig.set_size(outlen);
signreq.sig = base64->encode(sig);
OPENVPN_LOG("SIGNATURE[" << outlen << "]: " << signreq.sig);
}
#endif
void doOpenSSLSignRequest(ClientAPI::ExternalPKISignRequest &signreq)
{
if (signreq.hashalg.empty()) {
doOpenSSLSignature(signreq);
} else {
doOpenSSLDigestSignature(signreq);
}
}
#endif
virtual void external_pki_sign_request(ClientAPI::ExternalPKISignRequest& signreq) override
{
#if defined(USE_MBEDTLS)
if (epki_ctx.defined())
{
try {
// decode base64 sign request
BufferAllocated signdata(256, BufferAllocated::GROW);
base64->decode(signdata, signreq.data);
// get MD alg
const mbedtls_md_type_t md_alg = PKCS1::DigestPrefix::MbedTLSParse().alg_from_prefix(signdata);
// log info
OPENVPN_LOG("SIGN[" << PKCS1::DigestPrefix::MbedTLSParse::to_string(md_alg) << ',' << signdata.size() << "]: " << render_hex_generic(signdata));
// allocate buffer for signature
BufferAllocated sig(mbedtls_pk_get_len(epki_ctx.get()), BufferAllocated::ARRAY);
// sign it
size_t sig_size = 0;
const int status = mbedtls_pk_sign(epki_ctx.get(),
md_alg,
signdata.c_data(),
signdata.size(),
sig.data(),
&sig_size,
rng_callback,
this);
if (status != 0)
throw Exception("mbedtls_pk_sign failed, err=" + openvpn::to_string(status));
if (sig.size() != sig_size)
throw Exception("unexpected signature size");
// encode base64 signature
signreq.sig = base64->encode(sig);
OPENVPN_LOG("SIGNATURE[" << sig_size << "]: " << signreq.sig);
}
catch (const std::exception& e)
{
signreq.error = true;
signreq.errorText = std::string("external_pki_sign_request: ") + e.what();
}
}
else
#elif defined(USE_OPENSSL)
if (epki_pkey.defined())
{
try {
doOpenSSLSignRequest(signreq);
}
catch (const std::exception& e)
{
signreq.error = true;
signreq.errorText = std::string("external_pki_sign_request: ") + e.what();
}
}
else
#endif
{
signreq.error = true;
signreq.errorText = "external_pki_sign_request not implemented";
}
}
// RNG callback
static int rng_callback(void *arg, unsigned char *data, size_t len)
{
Client *self = (Client *)arg;
if (!self->rng)
{
self->rng.reset(new SSLLib::RandomAPI(false));
self->rng->assert_crypto();
}
return self->rng->rand_bytes_noexcept(data, len) ? 0 : -1; // using -1 as a general-purpose mbed TLS error code
}
virtual bool pause_on_connection_timeout() override
{
return false;
}
#ifdef OPENVPN_REMOTE_OVERRIDE
virtual bool remote_override_enabled() override
{
return !remote_override_cmd.empty();
}
virtual void remote_override(ClientAPI::RemoteOverride& ro) override
{
RedirectPipe::InOut pio;
Argv argv;
argv.emplace_back(remote_override_cmd);
OPENVPN_LOG(argv.to_string());
const int status = system_cmd(remote_override_cmd,
argv,
nullptr,
pio,
RedirectPipe::IGNORE_ERR,
nullptr);
if (!status)
{
const std::string out = string::first_line(pio.out);
OPENVPN_LOG("REMOTE OVERRIDE: " << out);
auto svec = string::split(out, ',');
if (svec.size() == 4)
{
ro.host = svec[0];
ro.ip = svec[1];
ro.port = svec[2];
ro.proto = svec[3];
}
else
ro.error = "cannot parse remote-override, expecting host,ip,port,proto (at least one or both of host and ip must be defined)";
}
else
ro.error = "status=" + std::to_string(status);
}
#endif
std::mutex log_mutex;
std::string dc_cookie;
RandomAPI::Ptr rng; // random data source for epki
volatile ClockTickAction clock_tick_action = CT_UNDEF;
#ifdef OPENVPN_REMOTE_OVERRIDE
std::string remote_override_cmd;
#endif
std::string write_url_fn;
};
static Client *the_client = nullptr; // GLOBAL
static void worker_thread()
{
#if !defined(OPENVPN_OVPNCLI_SINGLE_THREAD)
openvpn_io::detail::signal_blocker signal_blocker; // signals should be handled by parent thread
#endif
try {
std::cout << "Thread starting..." << std::endl;
ClientAPI::Status connect_status = the_client->connect();
if (connect_status.error)
{
std::cout << "connect error: ";
if (!connect_status.status.empty())
std::cout << connect_status.status << ": ";
std::cout << connect_status.message << std::endl;
}
}
catch (const std::exception& e)
{
std::cout << "Connect thread exception: " << e.what() << std::endl;
}
std::cout << "Thread finished" << std::endl;
}
static std::string read_profile(const char *fn, const std::string* profile_content)
{
if (!string::strcasecmp(fn, "http") && profile_content && !profile_content->empty())
return *profile_content;
else
{
ProfileMerge pm(fn, "ovpn", "", ProfileMerge::FOLLOW_FULL,
ProfileParseLimits::MAX_LINE_SIZE, ProfileParseLimits::MAX_PROFILE_SIZE);
if (pm.status() != ProfileMerge::MERGE_SUCCESS)
OPENVPN_THROW_EXCEPTION("merge config error: " << pm.status_string() << " : " << pm.error());
return pm.profile_content();
}
}
#if defined(OPENVPN_PLATFORM_WIN)
static void start_thread(Client& client)
{
// Set Windows title bar
const std::string title_text = "F2:Stats F3:Reconnect F4:Stop F5:Pause";
Win::Console::Title title(ClientAPI::OpenVPNClientHelper::platform() + " " + title_text);
Win::Console::Input console;
// start connect thread
std::unique_ptr<std::thread> thread;
volatile bool thread_exit = false;
the_client = &client;
thread.reset(new std::thread([&thread_exit]() {
worker_thread();
thread_exit = true;
}));
// wait for connect thread to exit, also check for keypresses
while (!thread_exit)
{
while (true)
{
const unsigned int c = console.get();
if (!c)
break;
else if (c == 0x3C) // F2
the_client->print_stats();
else if (c == 0x3D) // F3
the_client->reconnect(0);
else if (c == 0x3E) // F4
the_client->stop();
else if (c == 0x3F) // F5
the_client->pause("user-pause");
}
Sleep(1000);
}
// wait for connect thread to exit
thread->join();
the_client = nullptr;
}
#elif defined(OPENVPN_OVPNCLI_SINGLE_THREAD)
static void handler(int signum)
{
switch (signum)
{
case SIGTERM:
case SIGINT:
if (the_client)
the_client->set_clock_tick_action(Client::CT_STOP);
break;
case SIGHUP:
if (the_client)
the_client->set_clock_tick_action(Client::CT_RECONNECT);
break;
case SIGUSR1:
if (the_client)
the_client->set_clock_tick_action(Client::CT_STATS);
break;
case SIGUSR2:
{
// toggle pause/resume
static bool hup = false;
if (the_client)
{
if (hup)
the_client->set_clock_tick_action(Client::CT_RESUME);
else
the_client->set_clock_tick_action(Client::CT_PAUSE);
hup = !hup;
}
}
break;
default:
break;
}
}
static void start_thread(Client& client)
{
the_client = &client;
// capture signals that might occur while we're in worker_thread
Signal signal(handler, Signal::F_SIGINT|Signal::F_SIGTERM|Signal::F_SIGHUP|Signal::F_SIGUSR1|Signal::F_SIGUSR2);
// run the client
worker_thread();
the_client = nullptr;
}
#else
static void handler(int signum)
{
switch (signum)
{
case SIGTERM:
case SIGINT:
std::cout << "received stop signal " << signum << std::endl;
if (the_client)
the_client->stop();
break;
case SIGHUP:
std::cout << "received reconnect signal " << signum << std::endl;
if (the_client)
the_client->reconnect(0);
break;
case SIGUSR1:
if (the_client)
the_client->print_stats();
break;
case SIGUSR2:
{
// toggle pause/resume
static bool hup = false;
std::cout << "received pause/resume toggle signal " << signum << std::endl;
if (the_client)
{
if (hup)
the_client->resume();
else
the_client->pause("pause-resume-signal");
hup = !hup;
}
}
break;
default:
std::cout << "received unknown signal " << signum << std::endl;
break;
}
}
static void start_thread(Client& client)
{
std::unique_ptr<std::thread> thread;
// start connect thread
the_client = &client;
thread.reset(new std::thread([]() {
worker_thread();
}));
{
// catch signals that might occur while we're in join()
Signal signal(handler, Signal::F_SIGINT|Signal::F_SIGTERM|Signal::F_SIGHUP|Signal::F_SIGUSR1|Signal::F_SIGUSR2);
// wait for connect thread to exit
thread->join();
}
the_client = nullptr;
}
#endif
int openvpn_client(int argc, char *argv[], const std::string* profile_content)
{
static const struct option longopts[] = {
{ "username", required_argument, nullptr, 'u' },
{ "password", required_argument, nullptr, 'p' },
{ "response", required_argument, nullptr, 'r' },
{ "dc", required_argument, nullptr, 'D' },
{ "proto", required_argument, nullptr, 'P' },
{ "ipv6", required_argument, nullptr, '6' },
{ "server", required_argument, nullptr, 's' },
{ "port", required_argument, nullptr, 'R' },
{ "timeout", required_argument, nullptr, 't' },
{ "compress", required_argument, nullptr, 'c' },
{ "pk-password", required_argument, nullptr, 'z' },
{ "tvm-override", required_argument, nullptr, 'M' },
{ "proxy-host", required_argument, nullptr, 'h' },
{ "proxy-port", required_argument, nullptr, 'q' },
{ "proxy-username", required_argument, nullptr, 'U' },
{ "proxy-password", required_argument, nullptr, 'W' },
{ "peer-info", required_argument, nullptr, 'I' },
{ "gremlin", required_argument, nullptr, 'G' },
{ "proxy-basic", no_argument, nullptr, 'B' },
{ "alt-proxy", no_argument, nullptr, 'A' },
#if defined(ENABLE_KOVPN) || defined(ENABLE_OVPNDCO) || defined(ENABLE_OVPNDCOWIN)
{ "no-dco", no_argument, nullptr, 'd' },
#endif
{ "eval", no_argument, nullptr, 'e' },
{ "self-test", no_argument, nullptr, 'T' },
{ "cache-password", no_argument, nullptr, 'C' },
{ "no-cert", no_argument, nullptr, 'x' },
{ "force-aes-cbc", no_argument, nullptr, 'f' },
{ "google-dns", no_argument, nullptr, 'g' },
{ "persist-tun", no_argument, nullptr, 'j' },
{ "wintun", no_argument, nullptr, 'w' },
{ "allow-local-dns-resolvers", no_argument, nullptr, 'l' },
{ "def-keydir", required_argument, nullptr, 'k' },
{ "merge", no_argument, nullptr, 'm' },
{ "version", no_argument, nullptr, 'v' },
{ "auto-sess", no_argument, nullptr, 'a' },
{ "auth-retry", no_argument, nullptr, 'Y' },
{ "tcprof-override", required_argument, nullptr, 'X' },
{ "write-url", required_argument, nullptr, 'Z' },
{ "sso-methods", required_argument, nullptr, 'S' },
{ "ssl-debug", required_argument, nullptr, 1 },
{ "epki-cert", required_argument, nullptr, 2 },
{ "epki-ca", required_argument, nullptr, 3 },
{ "epki-key", required_argument, nullptr, 4 },
{ "legacy-algorithms", no_argument, nullptr, 'L' },
{ "non-preferred-algorithms", no_argument, nullptr, 'Q' },
#ifdef OPENVPN_REMOTE_OVERRIDE
{ "remote-override",required_argument, nullptr, 5 },
#endif
{ "tbc", no_argument, nullptr, 6 },
{ nullptr, 0, nullptr, 0 }
};
int ret = 0;
auto cleanup = Cleanup([]() {
the_client = nullptr;
});
try {
if (argc >= 2)
{
std::string username;
std::string password;
std::string response;
std::string dynamicChallengeCookie;
std::string proto;
std::string allowUnusedAddrFamilies;
std::string server;
std::string port;
int timeout = 0;
std::string compress;
std::string privateKeyPassword;
std::string tlsVersionMinOverride;
std::string tlsCertProfileOverride;
std::string proxyHost;
std::string proxyPort;
std::string proxyUsername;
std::string proxyPassword;
std::string peer_info;
std::string gremlin;
std::string ssoMethods;
bool eval = false;
bool self_test = false;
bool cachePassword = false;
bool disableClientCert = false;
bool proxyAllowCleartextAuth = false;
int defaultKeyDirection = -1;
int sslDebugLevel = 0;
bool googleDnsFallback = false;
bool autologinSessions = false;
bool retryOnAuthFailed = false;
bool tunPersist = false;