src/kits/network/libnetapi/notifications.cpp

   1 /*
   2  * Copyright 2008, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 /*!     The notifications API uses the generic syscall interface of the
   7         network's stack notification module.
   8 */
   9
  10 #include <net_notifications.h>
  11
  12 #include <MessengerPrivate.h>
  13 #include <generic_syscall_defs.h>
  14 #include <syscalls.h>
  15
  16
  17 static status_t
  18 check_for_notifications_syscall(void)
  19 {
  20         uint32 version = 0;
  21         return _kern_generic_syscall(NET_NOTIFICATIONS_SYSCALLS, B_SYSCALL_INFO,
  22                 &version, sizeof(version));
  23 }
  24
  25
  26 //      #pragma mark -
  27
  28
  29 status_t
  30 start_watching_network(uint32 flags, const BMessenger& target)
  31 {
  32         if (check_for_notifications_syscall() != B_OK)
  33                 return B_NOT_SUPPORTED;
  34
  35         BMessenger::Private targetPrivate(const_cast<BMessenger&>(target));
  36         net_notifications_control control;
  37         control.flags = flags;
  38         control.port = targetPrivate.Port();
  39         control.token = targetPrivate.Token();
  40
  41         return _kern_generic_syscall(NET_NOTIFICATIONS_SYSCALLS,
  42                 NET_NOTIFICATIONS_CONTROL_WATCHING, &control,
  43                 sizeof(net_notifications_control));
  44 }
  45
  46
  47 status_t
  48 start_watching_network(uint32 flags, const BHandler* handler,
  49         const BLooper* looper)
  50 {
  51         const BMessenger target(handler, looper);
  52         return start_watching_network(flags, target);
  53 }
  54
  55 status_t
  56 stop_watching_network(const BMessenger& target)
  57 {
  58         return start_watching_network(0, target);
  59                 // start_watching_network() without flags just stops everything
  60 }
  61
  62
  63 status_t
  64 stop_watching_network(const BHandler* handler, const BLooper* looper)
  65 {
  66         const BMessenger target(handler, looper);
  67         return stop_watching_network(target);
  68 }