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 "sockutils.h"  // for SOCK_ASSERT
  37 #include "portability.h"
  38 #include "fileconf.h"
  39
  40 static SERVICE_STATUS_HANDLE service_status_handle;
  41 static SERVICE_STATUS service_status;
  42
  43 void svc_geterr(char *str);
  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
  56         // This call is blocking. A new thread is created which will launch
  57         // the svc_main() function
  58         if ( (rc = StartServiceCtrlDispatcher(ste)) == 0)
  59                 svc_geterr("StartServiceCtrlDispatcher()");
  60
  61         return rc; // FALSE if this is not started as a service
  62 }
  63
  64 void svc_geterr(char *str)
  65 {
  66         char message[PCAP_ERRBUF_SIZE];
  67         char string[PCAP_ERRBUF_SIZE];
  68         int val;
  69
  70         val = GetLastError();
  71         FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS |
  72                                   FORMAT_MESSAGE_MAX_WIDTH_MASK,
  73                                   NULL, val, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  74                                   (LPSTR) string, PCAP_ERRBUF_SIZE, NULL);
  75
  76         pcap_snprintf(message, PCAP_ERRBUF_SIZE, "%s failed with error %d: %s", str, val, string);
  77
  78         SOCK_ASSERT(message, 1);
  79 }
  80
  81 void WINAPI svc_control_handler(DWORD Opcode)
  82 {
  83         switch(Opcode)
  84         {
  85                 case SERVICE_CONTROL_STOP:
  86                         //
  87                         // XXX - is this sufficient to clean up the service?
  88                         // To be really honest, only the main socket and
  89                         // such these stuffs are cleared; however the threads
  90                         // that are running are not stopped.
  91                         // This can be seen by placing a breakpoint at the
  92                         // end of svc_main(), in which you will see that is
  93                         // never reached. However, as soon as you set the
  94                         // service status to "stopped", the
  95                         // StartServiceCtrlDispatcher() returns and the main
  96                         // thread ends. Then, Win32 has a good automatic
  97                         // cleanup, so that all the threads which are still
  98                         // running are stopped when the main thread ends.
  99                         //
 100                         send_shutdown_event();
 101
 102                         update_svc_status(SERVICE_STOP_PENDING, 0);
 103                         break;
 104
 105                 /*
 106                         Pause and Continue have an usual meaning and they are used just to be able
 107                         to change the running parameters at run-time. In other words, they act
 108                         like the SIGHUP signal on UNIX. All the running threads continue to run and
 109                         they are not paused at all.
 110                         Particularly,
 111                         - PAUSE does nothing
 112                         - CONTINUE re-reads the configuration file and creates the new threads that
 113                         can be needed according to the new configuration.
 114                 */
 115                 case SERVICE_CONTROL_PAUSE:
 116                         update_svc_status(SERVICE_PAUSED, 0);
 117                         break;
 118
 119                 case SERVICE_CONTROL_CONTINUE:
 120                         update_svc_status(SERVICE_RUNNING, 0);
 121                         fileconf_read();
 122                         break;
 123
 124                 case SERVICE_CONTROL_INTERROGATE:
 125                         // Fall through to send current status.
 126                         //      WARNING: not implemented
 127                         update_svc_status(SERVICE_RUNNING, 0);
 128                         MessageBox(NULL, "Not implemented", "warning", MB_OK);
 129                         break;
 130
 131                 case SERVICE_CONTROL_PARAMCHANGE:
 132                         fileconf_read();
 133                         break;
 134         }
 135
 136         // Send current status.
 137         return;
 138 }
 139
 140 void WINAPI svc_main(DWORD argc, char **argv)
 141 {
 142         service_status_handle = RegisterServiceCtrlHandler(PROGRAM_NAME, svc_control_handler);
 143
 144         if (!service_status_handle)
 145                 return;
 146
 147         service_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS | SERVICE_INTERACTIVE_PROCESS;
 148         service_status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE;
 149         // | SERVICE_ACCEPT_SHUTDOWN ;
 150         update_svc_status(SERVICE_RUNNING, 0);
 151
 152         //
 153         // Service requests until we're told to stop.
 154         //
 155         main_startup();
 156
 157         //
 158         // It returned, so we were told to stop.
 159         //
 160         update_svc_status(SERVICE_STOPPED, 0);
 161 }
 162
 163 static void
 164 update_svc_status(DWORD state, DWORD progress_indicator)
 165 {
 166         service_status.dwWin32ExitCode = NO_ERROR;
 167         service_status.dwCurrentState = state;
 168         service_status.dwCheckPoint = progress_indicator;
 169         service_status.dwWaitHint = 0;
 170         SetServiceStatus(service_status_handle, &service_status);
 171 }
 172
 173 /*
 174 sc create rpcapd DisplayName= "Remote Packet Capture Protocol v.0 (experimental)" binpath= "C:\cvsroot\winpcap\wpcap\PRJ\Debug\rpcapd -d -f rpcapd.ini"
 175 sc description rpcapd "Allows to capture traffic on this host from a remote machine."
 176 */