The Tcpdump Group git mirrors - libpcap/blob - rpcapd/win32-svc.c

   1 /*
   2  * Copyright (c) 2002 - 2003
   3  * NetGroup, Politecnico di Torino (Italy)
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  * notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  * notice, this list of conditions and the following disclaimer in the
  14  * documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the Politecnico di Torino nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  */
  32
  33
  34 #include "rpcapd.h"
  35 #include <pcap.h>               // for PCAP_ERRBUF_SIZE
  36 #include "fmtutils.h"
  37 #include "portability.h"
  38 #include "fileconf.h"
  39 #include "log.h"
  40
  41 static SERVICE_STATUS_HANDLE service_status_handle;
  42 static SERVICE_STATUS service_status;
  43
  44 static void WINAPI svc_main(DWORD argc, char **argv);
  45 static void update_svc_status(DWORD state, DWORD progress_indicator);
  46
  47 int svc_start(void)
  48 {
  49         int rc;
  50         SERVICE_TABLE_ENTRY ste[] =
  51         {
  52                 { PROGRAM_NAME, svc_main },
  53                 { NULL, NULL }
  54         };
  55         char string[PCAP_ERRBUF_SIZE];
  56
  57         // This call is blocking. A new thread is created which will launch
  58         // the svc_main() function
  59         if ((rc = StartServiceCtrlDispatcher(ste)) == 0) {
  60                 pcap_win32_err_to_str(GetLastError(), string);
  61                 rpcapd_log(LOGPRIO_ERROR,
  62                     "StartServiceCtrlDispatcher() failed: %s", string);
  63         }
  64
  65         return rc; // FALSE if this is not started as a service
  66 }
  67
  68 void WINAPI svc_control_handler(DWORD Opcode)
  69 {
  70         switch(Opcode)
  71         {
  72                 case SERVICE_CONTROL_STOP:
  73                         //
  74                         // XXX - is this sufficient to clean up the service?
  75                         // To be really honest, only the main socket and
  76                         // such these stuffs are cleared; however the threads
  77                         // that are running are not stopped.
  78                         // This can be seen by placing a breakpoint at the
  79                         // end of svc_main(), in which you will see that is
  80                         // never reached. However, as soon as you set the
  81                         // service status to "stopped", the
  82                         // StartServiceCtrlDispatcher() returns and the main
  83                         // thread ends. Then, Win32 has a good automatic
  84                         // cleanup, so that all the threads which are still
  85                         // running are stopped when the main thread ends.
  86                         //
  87                         send_shutdown_notification();
  88
  89                         update_svc_status(SERVICE_STOP_PENDING, 0);
  90                         break;
  91
  92                 /*
  93                         Pause and Continue have an usual meaning and they are used just to be able
  94                         to change the running parameters at run-time. In other words, they act
  95                         like the SIGHUP signal on UNIX. All the running threads continue to run and
  96                         they are not paused at all.
  97                         Particularly,
  98                         - PAUSE does nothing
  99                         - CONTINUE re-reads the configuration file and creates the new threads that
 100                         can be needed according to the new configuration.
 101                 */
 102                 case SERVICE_CONTROL_PAUSE:
 103                         update_svc_status(SERVICE_PAUSED, 0);
 104                         break;
 105
 106                 case SERVICE_CONTROL_CONTINUE:
 107                         update_svc_status(SERVICE_RUNNING, 0);
 108                         //
 109                         // Tell the main loop to re-read the configuration.
 110                         //
 111                         send_reread_configuration_notification();
 112                         break;
 113
 114                 case SERVICE_CONTROL_INTERROGATE:
 115                         // Fall through to send current status.
 116                         //      WARNING: not implemented
 117                         update_svc_status(SERVICE_RUNNING, 0);
 118                         MessageBox(NULL, "Not implemented", "warning", MB_OK);
 119                         break;
 120
 121                 case SERVICE_CONTROL_PARAMCHANGE:
 122                         //
 123                         // Tell the main loop to re-read the configuration.
 124                         //
 125                         send_reread_configuration_notification();
 126                         break;
 127         }
 128
 129         // Send current status.
 130         return;
 131 }
 132
 133 void WINAPI svc_main(DWORD argc, char **argv)
 134 {
 135         service_status_handle = RegisterServiceCtrlHandler(PROGRAM_NAME, svc_control_handler);
 136
 137         if (!service_status_handle)
 138                 return;
 139
 140         service_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS | SERVICE_INTERACTIVE_PROCESS;
 141         service_status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE | SERVICE_ACCEPT_PARAMCHANGE;
 142         // | SERVICE_ACCEPT_SHUTDOWN ;
 143         update_svc_status(SERVICE_RUNNING, 0);
 144
 145         //
 146         // Service requests until we're told to stop.
 147         //
 148         main_startup();
 149
 150         //
 151         // It returned, so we were told to stop.
 152         //
 153         update_svc_status(SERVICE_STOPPED, 0);
 154 }
 155
 156 static void
 157 update_svc_status(DWORD state, DWORD progress_indicator)
 158 {
 159         service_status.dwWin32ExitCode = NO_ERROR;
 160         service_status.dwCurrentState = state;
 161         service_status.dwCheckPoint = progress_indicator;
 162         service_status.dwWaitHint = 0;
 163         SetServiceStatus(service_status_handle, &service_status);
 164 }
 165
 166 /*
 167 sc create rpcapd DisplayName= "Remote Packet Capture Protocol v.0 (experimental)" binpath= "C:\cvsroot\winpcap\wpcap\PRJ\Debug\rpcapd -d -f rpcapd.ini"
 168 sc description rpcapd "Allows to capture traffic on this host from a remote machine."
 169 */