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a85b5759f3
These files were pulled from the 1.6.3 release tarball. This new version builds against OpenSSL version 1.1 which will be the default in the new Debian Stable which is due to be released RealSoonNow (tm).
622 lines
18 KiB
C
622 lines
18 KiB
C
/*
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* winrc/win_svc.c - windows services API implementation for unbound
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*
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* Copyright (c) 2009, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains functions to integrate with the windows services API.
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* This means it handles the commandline switches to install and remove
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* the service (via CreateService and DeleteService), it handles
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* the ServiceMain() main service entry point when started as a service,
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* and it handles the Handler[_ex]() to process requests to the service
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* (such as start and stop and status).
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*/
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#include "config.h"
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#include "winrc/win_svc.h"
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#include "winrc/w_inst.h"
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#include "daemon/daemon.h"
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#include "daemon/worker.h"
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#include "daemon/remote.h"
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#include "util/config_file.h"
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#include "util/netevent.h"
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#include "util/ub_event.h"
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/** global service status */
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static SERVICE_STATUS service_status;
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/** global service status handle */
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static SERVICE_STATUS_HANDLE service_status_handle;
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/** global service stop event */
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static WSAEVENT service_stop_event = NULL;
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/** event struct for stop callbacks */
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static struct ub_event* service_stop_ev = NULL;
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/** if stop even means shutdown or restart */
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static int service_stop_shutdown = 0;
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/** config file to open. global communication to service_main() */
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static char* service_cfgfile = CONFIGFILE;
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/** commandline verbosity. global communication to service_main() */
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static int service_cmdline_verbose = 0;
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/** the cron callback */
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static struct comm_timer* service_cron = NULL;
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/** the cron thread */
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static ub_thread_type cron_thread = NULL;
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/** if cron has already done its quick check */
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static int cron_was_quick = 0;
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/**
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* Report current service status to service control manager
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* @param state: current state
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* @param exitcode: error code (when stopped)
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* @param wait: pending operation estimated time in milliseconds.
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*/
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static void report_status(DWORD state, DWORD exitcode, DWORD wait)
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{
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static DWORD checkpoint = 1;
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service_status.dwCurrentState = state;
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service_status.dwWin32ExitCode = exitcode;
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service_status.dwWaitHint = wait;
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if(state == SERVICE_START_PENDING)
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service_status.dwControlsAccepted = 0;
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else service_status.dwControlsAccepted = SERVICE_ACCEPT_STOP;
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if(state == SERVICE_RUNNING || state == SERVICE_STOPPED)
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service_status.dwCheckPoint = 0;
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else service_status.dwCheckPoint = checkpoint++;
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SetServiceStatus(service_status_handle, &service_status);
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}
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/**
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* Service control handler. Called by serviceControlManager when a control
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* code is sent to the service (with ControlService).
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* @param ctrl: control code
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*/
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static void
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hdlr(DWORD ctrl)
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{
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if(ctrl == SERVICE_CONTROL_STOP) {
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report_status(SERVICE_STOP_PENDING, NO_ERROR, 0);
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service_stop_shutdown = 1;
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/* send signal to stop */
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if(!WSASetEvent(service_stop_event))
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log_err("Could not WSASetEvent: %s",
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wsa_strerror(WSAGetLastError()));
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return;
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} else {
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/* ctrl == SERVICE_CONTROL_INTERROGATE or whatever */
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/* update status */
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report_status(service_status.dwCurrentState, NO_ERROR, 0);
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}
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}
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/**
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* report event to system event log
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* For use during startup and shutdown.
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* @param str: the error
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*/
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static void
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reportev(const char* str)
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{
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char b[256];
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char e[256];
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HANDLE* s;
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LPCTSTR msg = b;
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/* print quickly to keep GetLastError value */
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wsvc_err2str(e, sizeof(e), str, GetLastError());
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snprintf(b, sizeof(b), "%s: %s", SERVICE_NAME, e);
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s = RegisterEventSource(NULL, SERVICE_NAME);
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if(!s) return;
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ReportEvent(s, /* event log */
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EVENTLOG_ERROR_TYPE, /* event type */
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0, /* event category */
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MSG_GENERIC_ERR, /* event ID (from gen_msg.mc) */
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NULL, /* user security context */
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1, /* numstrings */
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0, /* binary size */
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&msg, /* strings */
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NULL); /* binary data */
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DeregisterEventSource(s);
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}
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/**
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* Obtain registry string (if it exists).
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* @param key: key string
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* @param name: name of value to fetch.
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* @return malloced string with the result or NULL if it did not
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* exist on an error (logged) was encountered.
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*/
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static char*
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lookup_reg_str(const char* key, const char* name)
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{
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HKEY hk = NULL;
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DWORD type = 0;
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BYTE buf[1024];
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DWORD len = (DWORD)sizeof(buf);
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LONG ret;
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char* result = NULL;
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
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if(ret == ERROR_FILE_NOT_FOUND)
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return NULL; /* key does not exist */
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else if(ret != ERROR_SUCCESS) {
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reportev("RegOpenKeyEx failed");
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return NULL;
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}
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ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
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if(RegCloseKey(hk))
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reportev("RegCloseKey");
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if(ret == ERROR_FILE_NOT_FOUND)
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return NULL; /* name does not exist */
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else if(ret != ERROR_SUCCESS) {
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reportev("RegQueryValueEx failed");
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return NULL;
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}
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if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
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buf[sizeof(buf)-1] = 0;
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buf[sizeof(buf)-2] = 0; /* for multi_sz */
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result = strdup((char*)buf);
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if(!result) reportev("out of memory");
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}
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return result;
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}
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/**
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* Obtain registry integer (if it exists).
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* @param key: key string
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* @param name: name of value to fetch.
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* @return integer value (if it exists), or 0 on error.
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*/
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static int
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lookup_reg_int(const char* key, const char* name)
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{
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HKEY hk = NULL;
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DWORD type = 0;
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BYTE buf[1024];
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DWORD len = (DWORD)sizeof(buf);
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LONG ret;
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int result = 0;
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
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if(ret == ERROR_FILE_NOT_FOUND)
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return 0; /* key does not exist */
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else if(ret != ERROR_SUCCESS) {
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reportev("RegOpenKeyEx failed");
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return 0;
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}
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ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
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if(RegCloseKey(hk))
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reportev("RegCloseKey");
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if(ret == ERROR_FILE_NOT_FOUND)
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return 0; /* name does not exist */
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else if(ret != ERROR_SUCCESS) {
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reportev("RegQueryValueEx failed");
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return 0;
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}
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if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
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buf[sizeof(buf)-1] = 0;
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buf[sizeof(buf)-2] = 0; /* for multi_sz */
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result = atoi((char*)buf);
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} else if(type == REG_DWORD) {
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DWORD r;
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memmove(&r, buf, sizeof(r));
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result = r;
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}
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return result;
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}
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/** wait for unbound-anchor process to finish */
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static void
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waitforubanchor(PROCESS_INFORMATION* pinfo)
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{
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/* we have 5 seconds scheduled for it, usually it will be very fast,
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* with only a UDP message or two (100 msec or so), but the https
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* connections could take some time */
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DWORD count = 7900;
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DWORD ret = WAIT_TIMEOUT;
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/* decrease timer every 1/10 second, we are still starting up */
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while(ret == WAIT_TIMEOUT) {
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ret = WaitForSingleObject(pinfo->hProcess, 100);
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if(count > 4000) count -= 100;
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else count--; /* go slow, it is taking long */
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if(count > 3000)
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report_status(SERVICE_START_PENDING, NO_ERROR, count);
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}
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verbose(VERB_ALGO, "unbound-anchor done");
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if(ret != WAIT_OBJECT_0) {
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return; /* did not end successfully */
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}
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if(!GetExitCodeProcess(pinfo->hProcess, &ret)) {
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log_err("GetExitCodeProcess failed");
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return;
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}
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verbose(VERB_ALGO, "unbound-anchor exit code is %d", (int)ret);
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if(ret != 0) {
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log_info("The root trust anchor has been updated.");
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}
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}
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/**
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* Perform root anchor update if so configured, by calling that process
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*/
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static void
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call_root_update(void)
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{
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char* rootanchor;
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rootanchor = lookup_reg_str("Software\\Unbound", "RootAnchor");
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if(rootanchor && strlen(rootanchor)>0) {
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STARTUPINFO sinfo;
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PROCESS_INFORMATION pinfo;
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memset(&pinfo, 0, sizeof(pinfo));
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memset(&sinfo, 0, sizeof(sinfo));
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sinfo.cb = sizeof(sinfo);
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verbose(VERB_ALGO, "rootanchor: %s", rootanchor);
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report_status(SERVICE_START_PENDING, NO_ERROR, 8000);
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if(!CreateProcess(NULL, rootanchor, NULL, NULL, 0,
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CREATE_NO_WINDOW, NULL, NULL, &sinfo, &pinfo))
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log_err("CreateProcess error for unbound-anchor.exe");
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else {
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waitforubanchor(&pinfo);
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CloseHandle(pinfo.hProcess);
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CloseHandle(pinfo.hThread);
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}
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}
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free(rootanchor);
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}
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/**
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* Init service. Keeps calling status pending to tell service control
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* manager that this process is not hanging.
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* @param r: restart, true on restart
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* @param d: daemon returned here.
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* @param c: config file returned here.
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* @return false if failed.
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*/
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static int
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service_init(int r, struct daemon** d, struct config_file** c)
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{
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struct config_file* cfg = NULL;
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struct daemon* daemon = NULL;
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if(!service_cfgfile) {
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char* newf = lookup_reg_str("Software\\Unbound", "ConfigFile");
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if(newf) service_cfgfile = newf;
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else service_cfgfile = strdup(CONFIGFILE);
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if(!service_cfgfile) fatal_exit("out of memory");
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}
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/* create daemon */
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if(r) daemon = *d;
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else daemon = daemon_init();
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if(!daemon) return 0;
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if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2800);
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/* read config */
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cfg = config_create();
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if(!cfg) return 0;
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if(!config_read(cfg, service_cfgfile, daemon->chroot)) {
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if(errno != ENOENT) {
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log_err("error in config file");
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return 0;
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}
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log_warn("could not open config file, using defaults");
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}
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if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2600);
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verbose(VERB_QUERY, "winservice - apply settings");
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/* apply settings and init */
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verbosity = cfg->verbosity + service_cmdline_verbose;
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w_config_adjust_directory(cfg);
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if(cfg->directory && cfg->directory[0]) {
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char* dir = cfg->directory;
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if(chdir(dir)) {
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log_err("could not chdir to %s: %s",
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dir, strerror(errno));
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if(errno != ENOENT)
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return 0;
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log_warn("could not change directory - continuing");
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} else
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verbose(VERB_QUERY, "chdir to %s", dir);
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}
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log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
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if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2400);
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verbose(VERB_QUERY, "winservice - apply cfg");
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daemon_apply_cfg(daemon, cfg);
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if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2300);
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if(!(daemon->rc = daemon_remote_create(cfg))) {
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log_err("could not set up remote-control");
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daemon_delete(daemon);
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config_delete(cfg);
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return 0;
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}
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/* open ports */
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/* keep reporting that we are busy starting */
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if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2200);
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verbose(VERB_QUERY, "winservice - open ports");
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if(!daemon_open_shared_ports(daemon)) return 0;
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verbose(VERB_QUERY, "winservice - ports opened");
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if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2000);
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*d = daemon;
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*c = cfg;
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return 1;
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}
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/**
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* Deinit the service
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*/
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static void
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service_deinit(struct daemon* daemon, struct config_file* cfg)
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{
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daemon_cleanup(daemon);
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config_delete(cfg);
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daemon_delete(daemon);
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}
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#ifdef DOXYGEN
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#define ATTR_UNUSED(x) x
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#endif
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/**
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* The main function for the service.
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* Called by the services API when starting unbound on windows in background.
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* Arguments could have been present in the string 'path'.
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* @param argc: nr args
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* @param argv: arg text.
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*/
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static void
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service_main(DWORD ATTR_UNUSED(argc), LPTSTR* ATTR_UNUSED(argv))
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{
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struct config_file* cfg = NULL;
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struct daemon* daemon = NULL;
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service_status_handle = RegisterServiceCtrlHandler(SERVICE_NAME,
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(LPHANDLER_FUNCTION)hdlr);
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if(!service_status_handle) {
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reportev("Could not RegisterServiceCtrlHandler");
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return;
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}
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service_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
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service_status.dwServiceSpecificExitCode = 0;
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/* see if we have root anchor update enabled */
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call_root_update();
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/* we are now starting up */
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report_status(SERVICE_START_PENDING, NO_ERROR, 3000);
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if(!service_init(0, &daemon, &cfg)) {
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reportev("Could not service_init");
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report_status(SERVICE_STOPPED, NO_ERROR, 0);
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return;
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}
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/* event that gets signalled when we want to quit; it
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* should get registered in the worker-0 waiting loop. */
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service_stop_event = WSACreateEvent();
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if(service_stop_event == WSA_INVALID_EVENT) {
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log_err("WSACreateEvent: %s", wsa_strerror(WSAGetLastError()));
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reportev("Could not WSACreateEvent");
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report_status(SERVICE_STOPPED, NO_ERROR, 0);
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return;
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}
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if(!WSAResetEvent(service_stop_event)) {
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log_err("WSAResetEvent: %s", wsa_strerror(WSAGetLastError()));
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}
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/* SetServiceStatus SERVICE_RUNNING;*/
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report_status(SERVICE_RUNNING, NO_ERROR, 0);
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verbose(VERB_QUERY, "winservice - init complete");
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/* daemon performs work */
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while(!service_stop_shutdown) {
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daemon_fork(daemon);
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if(!service_stop_shutdown) {
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daemon_cleanup(daemon);
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config_delete(cfg); cfg=NULL;
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if(!service_init(1, &daemon, &cfg)) {
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reportev("Could not service_init");
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report_status(SERVICE_STOPPED, NO_ERROR, 0);
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return;
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}
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}
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}
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/* exit */
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verbose(VERB_ALGO, "winservice - cleanup.");
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report_status(SERVICE_STOP_PENDING, NO_ERROR, 0);
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if(service_stop_event) (void)WSACloseEvent(service_stop_event);
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service_deinit(daemon, cfg);
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free(service_cfgfile);
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verbose(VERB_QUERY, "winservice - full stop");
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report_status(SERVICE_STOPPED, NO_ERROR, 0);
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}
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/** start the service */
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static void
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service_start(const char* cfgfile, int v, int c)
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{
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SERVICE_TABLE_ENTRY myservices[2] = {
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{SERVICE_NAME, (LPSERVICE_MAIN_FUNCTION)service_main},
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{NULL, NULL} };
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verbosity=v;
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if(verbosity >= VERB_QUERY) {
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/* log to file about start sequence */
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fclose(fopen("C:\\unbound.log", "w"));
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log_init("C:\\unbound.log", 0, 0);
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verbose(VERB_QUERY, "open logfile");
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} else log_init(0, 1, 0); /* otherwise, use Application log */
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if(c) {
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service_cfgfile = strdup(cfgfile);
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if(!service_cfgfile) fatal_exit("out of memory");
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} else service_cfgfile = NULL;
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service_cmdline_verbose = v;
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/* this call returns when service has stopped. */
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if(!StartServiceCtrlDispatcher(myservices)) {
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reportev("Could not StartServiceCtrlDispatcher");
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}
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}
|
|
|
|
void
|
|
wsvc_command_option(const char* wopt, const char* cfgfile, int v, int c)
|
|
{
|
|
if(strcmp(wopt, "install") == 0)
|
|
wsvc_install(stdout, NULL);
|
|
else if(strcmp(wopt, "remove") == 0)
|
|
wsvc_remove(stdout);
|
|
else if(strcmp(wopt, "service") == 0)
|
|
service_start(cfgfile, v, c);
|
|
else if(strcmp(wopt, "start") == 0)
|
|
wsvc_rc_start(stdout);
|
|
else if(strcmp(wopt, "stop") == 0)
|
|
wsvc_rc_stop(stdout);
|
|
else fatal_exit("unknown option: %s", wopt);
|
|
exit(0);
|
|
}
|
|
|
|
void
|
|
worker_win_stop_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev), void* arg)
|
|
{
|
|
struct worker* worker = (struct worker*)arg;
|
|
verbose(VERB_QUERY, "caught stop signal (wsaevent)");
|
|
worker->need_to_exit = 1;
|
|
comm_base_exit(worker->base);
|
|
}
|
|
|
|
/** wait for cron process to finish */
|
|
static void
|
|
waitforit(PROCESS_INFORMATION* pinfo)
|
|
{
|
|
DWORD ret = WaitForSingleObject(pinfo->hProcess, INFINITE);
|
|
verbose(VERB_ALGO, "cronaction done");
|
|
if(ret != WAIT_OBJECT_0) {
|
|
return; /* did not end successfully */
|
|
}
|
|
if(!GetExitCodeProcess(pinfo->hProcess, &ret)) {
|
|
log_err("GetExitCodeProcess failed");
|
|
return;
|
|
}
|
|
verbose(VERB_ALGO, "exit code is %d", (int)ret);
|
|
if(ret != 1) {
|
|
if(!WSASetEvent(service_stop_event))
|
|
log_err("Could not WSASetEvent: %s",
|
|
wsa_strerror(WSAGetLastError()));
|
|
}
|
|
}
|
|
|
|
/** Do the cron action and wait for result exit value */
|
|
static void*
|
|
win_do_cron(void* ATTR_UNUSED(arg))
|
|
{
|
|
int mynum=65;
|
|
char* cronaction;
|
|
log_thread_set(&mynum);
|
|
cronaction = lookup_reg_str("Software\\Unbound", "CronAction");
|
|
if(cronaction && strlen(cronaction)>0) {
|
|
STARTUPINFO sinfo;
|
|
PROCESS_INFORMATION pinfo;
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
memset(&sinfo, 0, sizeof(sinfo));
|
|
sinfo.cb = sizeof(sinfo);
|
|
verbose(VERB_ALGO, "cronaction: %s", cronaction);
|
|
if(!CreateProcess(NULL, cronaction, NULL, NULL, 0,
|
|
CREATE_NO_WINDOW, NULL, NULL, &sinfo, &pinfo))
|
|
log_err("CreateProcess error");
|
|
else {
|
|
waitforit(&pinfo);
|
|
CloseHandle(pinfo.hProcess);
|
|
CloseHandle(pinfo.hThread);
|
|
}
|
|
}
|
|
free(cronaction);
|
|
/* stop self */
|
|
CloseHandle(cron_thread);
|
|
cron_thread = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
/** Set the timer for cron for the next wake up */
|
|
static void
|
|
set_cron_timer(void)
|
|
{
|
|
struct timeval tv;
|
|
int crontime;
|
|
if(cron_was_quick == 0) {
|
|
cron_was_quick = 1;
|
|
crontime = 3600; /* first update some time after boot */
|
|
} else {
|
|
crontime = lookup_reg_int("Software\\Unbound", "CronTime");
|
|
if(crontime == 0) crontime = 60*60*24; /* 24 hours */
|
|
}
|
|
memset(&tv, 0, sizeof(tv));
|
|
tv.tv_sec = (time_t)crontime;
|
|
comm_timer_set(service_cron, &tv);
|
|
}
|
|
|
|
void
|
|
wsvc_cron_cb(void* arg)
|
|
{
|
|
struct worker* worker = (struct worker*)arg;
|
|
/* perform cronned operation */
|
|
verbose(VERB_ALGO, "cron timer callback");
|
|
if(cron_thread == NULL) {
|
|
/* create new thread to do it */
|
|
ub_thread_create(&cron_thread, win_do_cron, worker);
|
|
}
|
|
/* reschedule */
|
|
set_cron_timer();
|
|
}
|
|
|
|
void wsvc_setup_worker(struct worker* worker)
|
|
{
|
|
/* if not started with -w service, do nothing */
|
|
if(!service_stop_event)
|
|
return;
|
|
if(!(service_stop_ev = ub_winsock_register_wsaevent(
|
|
comm_base_internal(worker->base), service_stop_event,
|
|
&worker_win_stop_cb, worker))) {
|
|
fatal_exit("could not register wsaevent");
|
|
return;
|
|
}
|
|
if(!service_cron) {
|
|
service_cron = comm_timer_create(worker->base,
|
|
wsvc_cron_cb, worker);
|
|
if(!service_cron)
|
|
fatal_exit("could not create cron timer");
|
|
set_cron_timer();
|
|
}
|
|
}
|
|
|
|
void wsvc_desetup_worker(struct worker* ATTR_UNUSED(worker))
|
|
{
|
|
comm_timer_delete(service_cron);
|
|
service_cron = NULL;
|
|
}
|