4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief SyslogUDPTarget public header */
26 #ifndef HH_SENF_Utils_Logger_SyslogUDPTarget_
27 #define HH_SENF_Utils_Logger_SyslogUDPTarget_ 1
31 #include "LogFormat.hh"
33 #include <senf/Socket/Protocols/INet/INetAddressing.hh>
34 #include <senf/Socket/ClientSocketHandle.hh>
35 #include <senf/Socket/FramingPolicy.hh>
36 #include <senf/Socket/ReadWritePolicy.hh>
37 #include <senf/Socket/CommunicationPolicy.hh>
39 //#include "SyslogUDPTarget.mpp"
40 //-/////////////////////////////////////////////////////////////////////////////////////////////////
45 /** \brief Log target writing UDP syslog packets
47 The SyslogUDPTarget will send all %log messages directly via UDP to a target host. This
48 host should have a syslog daemon or relay running. The protocol is defined in <a
49 href="http://tools.ietf.org/html/rfc3164">RFC-3164</a>.
51 This %log target has some important benefits:
53 \li It will never block. It may however lose %log messages.
54 \li It does \e not add timestamp information locally.
56 These are \e advantages since this makes SyslogUDPTarget a very reliable high-performance
59 Valid facility values are from <tt>man 3 syslog</tt>:
62 <tt>LOG_AUTHPRIV</tt>, <tt>LOG_CRON</tt>, <tt>LOG_DAEMON</tt>, <tt>LOG_FTP</tt>,
63 <tt>LOG_KERN</tt>, <tt>LOG_LOCAL0</tt>, <tt>LOG_LOCAL1</tt>, <tt>LOG_LOCAL2</tt>,
64 <tt>LOG_LOCAL3</tt>, <tt>LOG_LOCAL4</tt>, <tt>LOG_LOCAL5</tt>, <tt>LOG_LOCAL6</tt>,
65 <tt>LOG_LOCAL7</tt>, <tt>LOG_LPR</tt>, <tt>LOG_MAIL</tt>, <tt>LOG_NEWS</tt>,
66 <tt>LOG_SYSLOG</tt>, <tt>LOG_USER</tt>, <tt>LOG_UUCP</tt>
68 the default facility is <tt>LOG_USER</tt>
70 The SENF %log levels are mapped to syslog levels in the following way:
72 <table class="senf fixedcolumn">
73 <tr><td>senf::log::VERBOSE</td> <td>\c LOG_DEBUG</td></tr>
74 <tr><td>senf::log::NOTICE</td> <td>\c LOG_INFO</td></tr>
75 <tr><td>senf::log::MESSAGE</td> <td>\c LOG_NOTICE</td></tr>
76 <tr><td>senf::log::IMPORTANT</td> <td>\c LOG_WARNING</td></tr>
77 <tr><td>senf::log::CRITICAL</td> <td>\c LOG_CRIT</td></tr>
78 <tr><td>senf::log::FATAL</td> <td>\c LOG_EMERG</td></tr>
81 \note Since the UDP syslog packets are limited to 1024 characters and there must be some
82 space left so a relay may optionally add a timestamp and hostname section, the %log
83 messages are split after 896 characters. Additionally the %log messages are split at each
84 newline char since non-printable characters are not allowed.
86 \implementation The RFC only \e recommends the exact message format. This allows us to
87 include the \c PRI part but skip the \c HEADER part (which includes the timestamp and
88 hostname) for better performance. We add a space after the \c PRI to force the syslog
89 daemon to skip the \c HEADER part.
94 : public Target, private detail::LogFormat
97 //-////////////////////////////////////////////////////////////////////////
100 //-////////////////////////////////////////////////////////////////////////
101 ///\name Structors and default members
104 explicit SyslogUDPTarget(senf::INet4Address const & target, int facility = LOG_USER);
105 explicit SyslogUDPTarget(senf::INet4SocketAddress const & target, int facility = LOG_USER);
106 explicit SyslogUDPTarget(senf::INet6Address const & target, int facility = LOG_USER);
107 explicit SyslogUDPTarget(senf::INet6SocketAddress const & target, int facility = LOG_USER);
110 //-////////////////////////////////////////////////////////////////////////
112 using detail::LogFormat::showTime;
113 using detail::LogFormat::showStream;
114 using detail::LogFormat::showLevel;
115 using detail::LogFormat::showArea;
116 using detail::LogFormat::timeFormat;
117 using detail::LogFormat::tag;
119 bool syslog() const; ///< \c true, if using syslog format, \c false otherwise
120 /**< When syslog format is disabled, messages are not
121 formated as valid syslog messages but sent using plain
123 void syslog(bool enabled=true); ///< Set syslog format
127 void v_write(time_type timestamp, std::string const & stream,
128 std::string const & area, unsigned level,
129 std::string const & message);
131 void consoleFormat(std::ostream & os);
134 typedef senf::ClientSocketHandle< senf::MakeSocketPolicy<
135 senf::DatagramFramingPolicy,
136 senf::ConnectedCommunicationPolicy,
137 senf::WriteablePolicy>::policy > Handle;
143 AUTHPRIV = LOG_AUTHPRIV,
166 struct RegisterConsole {
168 static boost::shared_ptr<senf::console::DirectoryNode> create(
169 senf::INet4SocketAddress const & target, LogFacility facility = USER);
170 static boost::shared_ptr<senf::console::DirectoryNode> create(
171 senf::INet4Address const & target, LogFacility facility = USER);
172 static boost::shared_ptr<senf::console::DirectoryNode> create(
173 senf::INet6SocketAddress const & target, LogFacility facility = USER);
174 static boost::shared_ptr<senf::console::DirectoryNode> create(
175 senf::INet6Address const & target, LogFacility facility = USER);
176 static RegisterConsole instance;
182 //-/////////////////////////////////////////////////////////////////////////////////////////////////
183 #include "SyslogUDPTarget.cci"
184 //#include "SyslogUDPTarget.ct"
185 //#include "SyslogUDPTarget.cti"
192 // comment-column: 40
193 // c-file-style: "senf"
194 // indent-tabs-mode: nil
195 // ispell-local-dictionary: "american"
196 // compile-command: "scons -u test"