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monero/contrib/epee/include/service_impl_base.h

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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#ifndef _SERVICE_IMPL_BASE_H_
#define _SERVICE_IMPL_BASE_H_
#pragma comment(lib, "advapi32.lib")
namespace epee
{
class service_impl_base {
public:
service_impl_base();
virtual ~service_impl_base();
virtual const char *get_name() = 0;
virtual const char *get_caption() = 0;
virtual const char *get_description() = 0;
bool run_service();
virtual bool install();
virtual bool remove();
virtual bool init();
void set_control_accepted(unsigned controls);
void set_status(unsigned state, unsigned pending = 0);
unsigned get_control_accepted();
private:
virtual void service_main() = 0;
virtual unsigned service_handler(unsigned control, unsigned event_code,
void *pdata) = 0;
//-------------------------------------------------------------------------
static service_impl_base*& instance();
//-------------------------------------------------------------------------
static DWORD __stdcall _service_handler(DWORD control, DWORD event,
void *pdata, void *pcontext);
static void __stdcall service_entry(DWORD argc, char **pargs);
virtual SERVICE_FAILURE_ACTIONSA* get_failure_actions();
private:
SC_HANDLE m_manager;
SC_HANDLE m_service;
SERVICE_STATUS_HANDLE m_status_handle;
DWORD m_accepted_control;
};
inline service_impl_base::service_impl_base() {
m_manager = 0;
m_service = 0;
m_status_handle = 0;
m_accepted_control = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN
| SERVICE_ACCEPT_PAUSE_CONTINUE;
instance() = this;
}
//-----------------------------------------------------------------------------
inline service_impl_base::~service_impl_base() {
if (m_service) {
::CloseServiceHandle(m_service);
}
m_service = 0;
if (m_manager) {
::CloseServiceHandle(m_manager);
}
m_manager = 0;
instance() = 0;
}
//-----------------------------------------------------------------------------
inline service_impl_base*& service_impl_base::instance() {
static service_impl_base *pservice = NULL;
return pservice;
}
//-----------------------------------------------------------------------------
inline
bool service_impl_base::install() {
CHECK_AND_ASSERT(!m_service, false);
const char *psz_descr = get_description();
SERVICE_FAILURE_ACTIONSA* fail_acts = get_failure_actions();
char sz_path[MAX_PATH];
::GetModuleFileNameA(0, sz_path, sizeof(sz_path));
::GetShortPathNameA(sz_path, sz_path, sizeof(sz_path));
while (TRUE) {
if (!m_manager) {
m_manager = ::OpenSCManager(NULL, NULL, GENERIC_ALL);
if (!m_manager) {
int err = GetLastError();
LOG_ERROR(
"Failed to OpenSCManager(), last err="
<< log_space::get_win32_err_descr(err));
break;
}
}
m_service = ::CreateServiceA(m_manager, get_name(), get_caption(),
SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_DEMAND_START,
SERVICE_ERROR_IGNORE, sz_path, 0, 0, 0, 0, 0);
if (!m_service) {
int err = GetLastError();
LOG_ERROR(
"Failed to CreateService(), last err="
<< log_space::get_win32_err_descr(err));
break;
}
if (psz_descr) {
SERVICE_DESCRIPTIONA sd = { (char*) psz_descr };
if (!::ChangeServiceConfig2A(m_service, SERVICE_CONFIG_DESCRIPTION,
&sd)) {
int err = GetLastError();
LOG_ERROR(
"Failed to ChangeServiceConfig2(SERVICE_CONFIG_DESCRIPTION), last err="
<< log_space::get_win32_err_descr(err));
break;
}
}
if (fail_acts) {
if (!::ChangeServiceConfig2A(m_service, SERVICE_CONFIG_FAILURE_ACTIONS,
fail_acts)) {
int err = GetLastError();
LOG_ERROR(
"Failed to ChangeServiceConfig2(SERVICE_CONFIG_FAILURE_ACTIONS), last err="
<< log_space::get_win32_err_descr(err));
break;
}
}
LOG_PRINT("Installed succesfully.", LOG_LEVEL_0);
return true;
}
LOG_PRINT("Failed to install.", LOG_LEVEL_0);
return false;
}
//-----------------------------------------------------------------------------
inline
bool service_impl_base::remove() {
CHECK_AND_ASSERT(!m_service, false);
while (TRUE) {
if (!m_manager) {
m_manager = ::OpenSCManager(0, 0, GENERIC_ALL);
if (!m_manager) {
int err = GetLastError();
LOG_ERROR(
"Failed to OpenSCManager(), last err="
<< log_space::get_win32_err_descr(err));
break;
}
}
if (!m_service) {
m_service = ::OpenServiceA(m_manager, get_name(), SERVICE_STOP | DELETE);
if (!m_service) {
int err = GetLastError();
LOG_ERROR(
"Failed to OpenService(), last err="
<< log_space::get_win32_err_descr(err));
break;
}
}
SERVICE_STATUS status = { };
if (!::ControlService(m_service, SERVICE_CONTROL_STOP, &status)) {
int err = ::GetLastError();
if (err == ERROR_SHUTDOWN_IN_PROGRESS)
continue;
else if (err != ERROR_SERVICE_NOT_ACTIVE) {
LOG_ERROR(
"Failed to ControlService(SERVICE_CONTROL_STOP), last err="
<< log_space::get_win32_err_descr(err));
break;
}
}
if (!::DeleteService(m_service)) {
int err = ::GetLastError();
LOG_ERROR(
"Failed to ControlService(SERVICE_CONTROL_STOP), last err="
<< log_space::get_win32_err_descr(err));
break;
}
LOG_PRINT("Removed successfully.", LOG_LEVEL_0);
break;
}
return true;
}
//-----------------------------------------------------------------------------
inline
bool service_impl_base::init() {
return true;
}
//-----------------------------------------------------------------------------
inline
bool service_impl_base::run_service() {
CHECK_AND_ASSERT(!m_service, false);
long error_code = 0;
SERVICE_TABLE_ENTRYA service_table[2];
ZeroMemory(&service_table, sizeof(service_table));
service_table->lpServiceName = (char*) get_name();
service_table->lpServiceProc = service_entry;
LOG_PRINT("[+] Start service control dispatcher for \"" << get_name() << "\"",
LOG_LEVEL_1);
error_code = 1;
BOOL res = ::StartServiceCtrlDispatcherA(service_table);
if (!res) {
int err = GetLastError();
LOG_PRINT(
"[+] Error starting service control dispatcher, err="
<< log_space::get_win32_err_descr(err), LOG_LEVEL_1);
return false;
} else {
LOG_PRINT("[+] End service control dispatcher for \"" << get_name() << "\"",
LOG_LEVEL_1);
}
return true;
}
//-----------------------------------------------------------------------------
inline DWORD __stdcall service_impl_base::_service_handler(DWORD control,
DWORD event, void *pdata, void *pcontext) {
CHECK_AND_ASSERT(pcontext, ERROR_CALL_NOT_IMPLEMENTED);
service_impl_base *pservice = (service_impl_base*) pcontext;
return pservice->service_handler(control, event, pdata);
}
//-----------------------------------------------------------------------------
inline
void __stdcall service_impl_base::service_entry(DWORD argc, char **pargs) {
service_impl_base *pme = instance();
LOG_PRINT("instance: " << pme, LOG_LEVEL_4);
if (!pme) {
LOG_ERROR("Error: at service_entry() pme = NULL");
return;
}
pme->m_status_handle = ::RegisterServiceCtrlHandlerExA(pme->get_name(),
_service_handler, pme);
pme->set_status(SERVICE_RUNNING);
pme->service_main();
pme->set_status(SERVICE_STOPPED);
}
//-----------------------------------------------------------------------------
inline
void service_impl_base::set_status(unsigned state, unsigned pending) {
if (!m_status_handle)
return;
SERVICE_STATUS status = { 0 };
status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
status.dwCurrentState = state;
status.dwControlsAccepted = m_accepted_control;
/*status.dwWin32ExitCode = NO_ERROR;
status.dwServiceSpecificExitCode = ERROR_SERVICE_SPECIFIC_ERROR;
status.dwCheckPoint = 0;
status.dwWaitHint = 0;
status.dwCurrentState = state;*/
if (state == SERVICE_START_PENDING || state == SERVICE_STOP_PENDING
|| state == SERVICE_CONTINUE_PENDING || state == SERVICE_PAUSE_PENDING) {
status.dwWaitHint = 2000;
status.dwCheckPoint = pending;
}
::SetServiceStatus(m_status_handle, &status);
}
//-----------------------------------------------------------------------------------------
inline
void service_impl_base::set_control_accepted(unsigned controls) {
m_accepted_control = controls;
}
//-----------------------------------------------------------------------------------------
inline
unsigned service_impl_base::get_control_accepted() {
return m_accepted_control;
}
//-----------------------------------------------------------------------------------------
inline SERVICE_FAILURE_ACTIONSA* service_impl_base::get_failure_actions() {
// first 3 failures in 30 minutes. Service will be restarted.
// do nothing for next failures
static SC_ACTION sa[] = { { SC_ACTION_RESTART, 3 * 1000 }, {
SC_ACTION_RESTART, 3 * 1000 }, { SC_ACTION_RESTART, 3 * 1000 }, {
SC_ACTION_NONE, 0 } };
static SERVICE_FAILURE_ACTIONSA sfa = { 1800, // interval for failures counter - 30 min
"", NULL, 4, (SC_ACTION*) &sa };
// TODO: refactor this code, really unsafe!
return &sfa;
}
}
#endif //_SERVICE_IMPL_BASE_H_
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