summaryrefslogtreecommitdiff
path: root/src/posix/signalHandler.hpp
blob: 11d0c2f1efeb072900438b3811da41970793f719 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/*
 *  anytun
 *
 *  The secure anycast tunneling protocol (satp) defines a protocol used
 *  for communication between any combination of unicast and anycast
 *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
 *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
 *  ethernet, ip, arp ...). satp directly includes cryptography and
 *  message authentication based on the methodes used by SRTP.  It is
 *  intended to deliver a generic, scaleable and secure solution for
 *  tunneling and relaying of packets of any protocol.
 *
 *
 *  Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
 *                          Christian Pointner <satp@wirdorange.org>
 *
 *  This file is part of Anytun.
 *
 *  Anytun is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  Anytun is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef ANYTUN_signalHandler_hpp_INCLUDED
#define ANYTUN_signalHandler_hpp_INCLUDED

#include <csignal>
#include <boost/thread.hpp>
#include <boost/bind.hpp>

int SigIntHandler(int /*sig*/, const std::string& /*msg*/)
{
  cLog.msg(Log::PRIO_NOTICE) << "SIG-Int caught, exiting";
  return 1;
}

int SigQuitHandler(int /*sig*/, const std::string& /*msg*/)
{
  cLog.msg(Log::PRIO_NOTICE) << "SIG-Quit caught, exiting";
  return 1;
}

int SigHupHandler(int /*sig*/, const std::string& /*msg*/)
{
  cLog.msg(Log::PRIO_NOTICE) << "SIG-Hup caught";
  return 0;
}

int SigTermHandler(int /*sig*/, const std::string& /*msg*/)
{
  cLog.msg(Log::PRIO_NOTICE) << "SIG-Term caught, exiting";
  return 1;
}

int SigUsr1Handler(int /*sig*/, const std::string& /*msg*/)
{
  cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr1 caught";
  return 0;
}

int SigUsr2Handler(int /*sig*/, const std::string& /*msg*/)
{
  cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr2 caught";
  return 0;
}

/// TODO: this outstandignly ugly please and i really can't stress the please fix it asap!!!!!!!
extern std::ofstream pidFile;

void handleSignal()
{
  if(pidFile.is_open()) {
    pid_t pid = getpid();
    pidFile << pid;
    pidFile.close();
  }

  struct timespec timeout;
  sigset_t signal_set;
  int sigNum;
  while(1) {
    sigemptyset(&signal_set);
    sigaddset(&signal_set, SIGINT);
    sigaddset(&signal_set, SIGQUIT);
    sigaddset(&signal_set, SIGHUP);
    sigaddset(&signal_set, SIGTERM);
    sigaddset(&signal_set, SIGUSR1);
    sigaddset(&signal_set, SIGUSR2);
    timeout.tv_sec = 1;
    timeout.tv_nsec = 0;
    sigNum = sigtimedwait(&signal_set, NULL, &timeout);
    if(sigNum == -1) {
      if(errno != EINTR && errno != EAGAIN) {
        cLog.msg(Log::PRIO_ERROR) << "sigwait failed with error: \"" << AnytunErrno(errno) << "\" SignalHandling will be disabled";
        break;
      }
    } else {
      gSignalController.inject(sigNum);
    }
  }
}

void registerSignalHandler(SignalController& ctrl, DaemonService& /*service*/)
{
  sigset_t signal_set;

  sigemptyset(&signal_set);
  sigaddset(&signal_set, SIGINT);
  sigaddset(&signal_set, SIGQUIT);
  sigaddset(&signal_set, SIGHUP);
  sigaddset(&signal_set, SIGTERM);
  sigaddset(&signal_set, SIGUSR1);
  sigaddset(&signal_set, SIGUSR2);

#if defined(BOOST_HAS_PTHREADS)
  pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
#else
#error The signalhandler works only with pthreads
#endif

  boost::thread(boost::bind(handleSignal));

  ctrl.handler[SIGINT] = boost::bind(SigIntHandler, _1, _2);
  ctrl.handler[SIGQUIT] = boost::bind(SigQuitHandler, _1, _2);
  ctrl.handler[SIGHUP] = boost::bind(SigHupHandler, _1, _2);
  ctrl.handler[SIGTERM] = boost::bind(SigTermHandler, _1, _2);
  ctrl.handler[SIGUSR1] = boost::bind(SigUsr1Handler, _1, _2);
  ctrl.handler[SIGUSR2] = boost::bind(SigUsr2Handler, _1, _2);

  cLog.msg(Log::PRIO_DEBUG) << "signal handlers are now registered";
}

#endif