log.h

   1 /*
   2  *  anytun
   3  *
   4  *  The secure anycast tunneling protocol (satp) defines a protocol used
   5  *  for communication between any combination of unicast and anycast
   6  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
   7  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
   8  *  ethernet, ip, arp ...). satp directly includes cryptography and
   9  *  message authentication based on the methodes used by SRTP.  It is
  10  *  intended to deliver a generic, scaleable and secure solution for
  11  *  tunneling and relaying of packets of any protocol.
  12  *
  13  *
  14  *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
  15  *
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License version 2
  18  *  as published by the Free Software Foundation.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program (see the file COPYING included with this
  27  *  distribution); if not, write to the Free Software Foundation, Inc.,
  28  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29  */
  30
  31 #ifndef _LOG_H_
  32 #define _LOG_H_
  33
  34 #include <string>
  35 #include <sstream>
  36 #include <syslog.h>
  37
  38 #include "threadUtils.hpp"
  39
  40 class Log;
  41
  42 class LogStringBuilder
  43 {
  44 public:
  45   LogStringBuilder(LogStringBuilder const& src);
  46   LogStringBuilder(Log& l, int p);
  47   ~LogStringBuilder();
  48
  49   template<class T>
  50   std::ostream& operator<<(T const& value) { return stream << value; }
  51
  52 private:
  53   Log& log;
  54   int prio;
  55   std::stringstream stream;
  56 };
  57
  58 class Log : public std::ostringstream
  59 {
  60 public:
  61   static const int FAC_USER = LOG_USER;
  62   static const int FAC_MAIL = LOG_MAIL;
  63   static const int FAC_DAEMON = LOG_DAEMON;
  64   static const int FAC_AUTH = LOG_AUTH;
  65   static const int FAC_SYSLOG = LOG_SYSLOG;
  66   static const int FAC_LPR = LOG_LPR;
  67   static const int FAC_NEWS = LOG_NEWS;
  68   static const int FAC_UUCP = LOG_UUCP;
  69   static const int FAC_CRON = LOG_CRON;
  70   static const int FAC_AUTHPRIV = LOG_AUTHPRIV;
  71   static const int FAC_FTP = LOG_FTP;
  72   static const int FAC_LOCAL0 = LOG_LOCAL0;
  73   static const int FAC_LOCAL1 = LOG_LOCAL1;
  74   static const int FAC_LOCAL2 = LOG_LOCAL2;
  75   static const int FAC_LOCAL3 = LOG_LOCAL3;
  76   static const int FAC_LOCAL4 = LOG_LOCAL4;
  77   static const int FAC_LOCAL5 = LOG_LOCAL5;
  78   static const int FAC_LOCAL6 = LOG_LOCAL6;
  79   static const int FAC_LOCAL7 = LOG_LOCAL7;
  80
  81   static const int PRIO_EMERG = LOG_EMERG;
  82   static const int PRIO_ALERT = LOG_ALERT;
  83   static const int PRIO_CRIT = LOG_CRIT;
  84   static const int PRIO_ERR = LOG_ERR;
  85   static const int PRIO_WARNING = LOG_WARNING;
  86   static const int PRIO_NOTICE = LOG_NOTICE;
  87   static const int PRIO_INFO = LOG_INFO;
  88   static const int PRIO_DEBUG = LOG_DEBUG;
  89
  90   static Log& instance();
  91
  92   Log& setLogName(std::string newLogName);
  93   std::string getLogName() const { return logName; }
  94   Log& setFacility(int newFacility);
  95   int getFacility() const { return facility; }
  96
  97   LogStringBuilder msg(int prio=PRIO_INFO) { return LogStringBuilder(*this, prio); }
  98
  99 private:
 100   Log();
 101   ~Log();
 102   Log(const Log &l);
 103   void operator=(const Log &l);
 104
 105   static Log* inst;
 106   static Mutex instMutex;
 107   class instanceCleaner {
 108     public: ~instanceCleaner() {
 109       if(Log::inst != 0)
 110         delete Log::inst;
 111     }
 112   };
 113   friend class instanceCleaner;
 114
 115   void open();
 116
 117   Mutex mutex;
 118   friend class LogStringBuilder;
 119
 120   std::string logName;
 121   int facility;
 122 };
 123
 124 extern Log& cLog;
 125
 126 #endif