2 The software in this package is distributed under the GNU General
3 Public License version 2 (with a special exception described below).
5 A copy of GNU General Public License (GPL) is included in this distribution,
6 in the file COPYING.GPL.
8 As a special exception, if other files instantiate templates or use macros
9 or inline functions from this file, or you compile this file and link it
10 with other works to produce a work based on this file, this file
11 does not by itself cause the resulting work to be covered
12 by the GNU General Public License.
14 However the source code for this file must still be made available
15 in accordance with section (3) of the GNU General Public License.
17 This exception does not invalidate any other reasons why a work based
18 on this file might be covered by the GNU General Public License.
20 #include "host/hoststatus.h"
24 #include "boost_assert_handler.h"
28 //-----------------------------------------------------------------------------
30 //-----------------------------------------------------------------------------
33 * @param host_address The address of the host it has to analyze.
34 * @param ping_fail_percentage_limit The percentage threshold of pings that can
36 * @param link_analyzer The object used to notify the status of the host.
38 HostStatus::HostStatus(
39 const string &host_address,
40 const int ping_fail_limit_percentage,
41 const LinkStatusItem link_analyzer
43 HostAddress( host_address ),
44 LinkAnalyzer( link_analyzer ),
45 PingFailLimitPercentage( ping_fail_limit_percentage ),
47 PingsPerformedCount( 0 ),
48 PingsFailedCount( 0 ),
49 ExceededPingFailedLimit( false )
51 BOOST_ASSERT( !HostAddress.empty() );
52 BOOST_ASSERT( ( 0 <= PingFailLimitPercentage ) && ( PingFailLimitPercentage <= 100 ) );
55 HostStatus::~HostStatus()
60 * @param resolved_ip_count The number of IPs resolved for the host.
62 void HostStatus::set_resolved_ip_count( const int resolved_ip_count )
64 BOOST_ASSERT( 1 <= resolved_ip_count );
66 ResolvedIpCount = resolved_ip_count;
70 * @return true if the amount of failed pings given to the host exceeded the
73 bool HostStatus::exceeded_ping_failed_limit() const
75 return ExceededPingFailedLimit;
79 * Adds a ping status (success or failure).
82 void HostStatus::update_ping_statistics( bool ping_success )
84 BOOST_ASSERT( 1 <= ResolvedIpCount );
85 BOOST_ASSERT( 0 <= PingsPerformedCount );
86 BOOST_ASSERT( PingsFailedCount <= PingsPerformedCount );
88 increase_ping_performed_count();
92 increase_ping_failed_count();
95 analyze_ping_failed_count();
97 // after we tried all IPs resolved for this host, we can analyze how many
99 if ( tried_all_resolved_ip() )
101 analyze_ping_statistics();
103 reset_ping_counters();
106 BOOST_ASSERT( PingsFailedCount <= PingsPerformedCount );
109 void HostStatus::report_dns_resolution_failure()
111 LinkAnalyzer->notify_host_down( HostAddress );
115 bool HostStatus::tried_all_resolved_ip() const
117 BOOST_ASSERT( ( 0 < PingsPerformedCount ) && ( PingsPerformedCount <= ResolvedIpCount ) );
119 return ( PingsPerformedCount == ResolvedIpCount );
122 void HostStatus::analyze_ping_statistics()
124 BOOST_ASSERT( !HostAddress.empty() );
125 BOOST_ASSERT( PingsPerformedCount == ResolvedIpCount );
127 // notify if the amount of pings that failed exceed the limit
128 if ( exceeded_ping_failed_limit() )
130 LinkAnalyzer->notify_host_down( HostAddress );
134 LinkAnalyzer->notify_host_up( HostAddress );
138 void HostStatus::reset_ping_counters()
140 PingsPerformedCount = 0;
141 PingsFailedCount = 0;
144 void HostStatus::increase_ping_performed_count()
146 ++PingsPerformedCount;
148 BOOST_ASSERT( ( 0 <= PingsPerformedCount ) && ( PingsPerformedCount <= ResolvedIpCount ) );
151 void HostStatus::increase_ping_failed_count()
155 BOOST_ASSERT( ( 0 <= PingsFailedCount ) && ( PingsFailedCount <= PingsPerformedCount ) );
158 void HostStatus::analyze_ping_failed_count()
160 BOOST_ASSERT( ( 0 <= PingFailLimitPercentage ) && ( PingFailLimitPercentage <= 100 ) );
161 BOOST_ASSERT( ( 0 <= PingsFailedCount ) && ( PingsFailedCount <= PingsPerformedCount ) );
163 int ping_fail_limit_count = ( ResolvedIpCount * PingFailLimitPercentage ) / 100;
165 // keep a boolean variable because the PingsFailedCount can be reseted
166 if ( PingsFailedCount > ping_fail_limit_count )
168 ExceededPingFailedLimit = true;
172 ExceededPingFailedLimit = false;