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91fcc471 TJ |
1 | /* |
2 | The software in this package is distributed under the GNU General | |
3 | Public License version 2 (with a special exception described below). | |
4 | ||
5 | A copy of GNU General Public License (GPL) is included in this distribution, | |
6 | in the file COPYING.GPL. | |
7 | ||
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. | |
13 | ||
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. | |
16 | ||
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. | |
19 | */ | |
6c14bbee | 20 | #include "host/hoststatus.h" |
ddf41c89 GMF |
21 | |
22 | #include <iostream> | |
3f7c921f | 23 | #include <logfunc.hpp> |
ddf41c89 | 24 | |
780b0bca | 25 | #include "boost_assert_handler.h" |
ddf41c89 GMF |
26 | |
27 | using namespace std; | |
3f7c921f | 28 | using I2n::Logger::GlobalLogger; |
ddf41c89 GMF |
29 | |
30 | //----------------------------------------------------------------------------- | |
6c14bbee | 31 | // HostStatus |
ddf41c89 GMF |
32 | //----------------------------------------------------------------------------- |
33 | ||
c01a6023 | 34 | /** |
6c14bbee GMF |
35 | * @param host_address The address of the host it has to analyze. |
36 | * @param ping_fail_percentage_limit The percentage threshold of pings that can | |
c01a6023 | 37 | * fail. |
a7b15639 CH |
38 | * @param ping_congestion_limit_percentage The percentage threshold of pings |
39 | * that can fail due to line congestion | |
40 | * @param ping_duration_congestion_thresh Threshold in micro seconds that marks | |
41 | * the difference between a "normal" and a congested line | |
42 | * @param n_parallel_pings Number of pings that is sent for each IP | |
6c14bbee | 43 | * @param link_analyzer The object used to notify the status of the host. |
c01a6023 | 44 | */ |
6c14bbee | 45 | HostStatus::HostStatus( |
ddf41c89 | 46 | const string &host_address, |
cd4048df | 47 | const int ping_fail_limit_percentage, |
a7b15639 CH |
48 | const int ping_congestion_limit_percentage, |
49 | const int ping_duration_congestion_thresh, | |
91aa83f9 | 50 | const int n_parallel_pings, |
c6c54dfb | 51 | const LinkStatusItem link_analyzer |
ddf41c89 | 52 | ) : |
c1fff16a | 53 | HostAddress( host_address ), |
fb469ffa | 54 | LinkAnalyzer( link_analyzer ), |
cd4048df | 55 | PingFailLimitPercentage( ping_fail_limit_percentage ), |
a7b15639 CH |
56 | PingCongestionLimitPercentage( ping_congestion_limit_percentage ), |
57 | PingDurationCongestionsThresh( ping_duration_congestion_thresh*1000000 ), | |
ddf41c89 GMF |
58 | ResolvedIpCount( 0 ), |
59 | PingsPerformedCount( 0 ), | |
d8a91bd6 | 60 | PingsFailedCount( 0 ), |
a7b15639 | 61 | PingCongestionCount( 0 ), |
91aa83f9 | 62 | ExceededPingFailedLimit( false ), |
a7b15639 | 63 | ExceededPingCongestionLimit( false ), |
91aa83f9 | 64 | NParallelPingers( n_parallel_pings) |
ddf41c89 | 65 | { |
d4793cc9 | 66 | BOOST_ASSERT( !HostAddress.empty() ); |
a7b15639 CH |
67 | BOOST_ASSERT( ( 0 <= PingFailLimitPercentage ) |
68 | && ( PingFailLimitPercentage <= 100 ) ); | |
69 | BOOST_ASSERT( ( 0 <= PingCongestionLimitPercentage ) | |
70 | && ( PingCongestionLimitPercentage <= 100 ) ); | |
ddf41c89 GMF |
71 | } |
72 | ||
6c14bbee | 73 | HostStatus::~HostStatus() |
ddf41c89 GMF |
74 | { |
75 | } | |
76 | ||
a7b15639 | 77 | |
242e5fb3 CH |
78 | void HostStatus::set_n_parallel_pings(const int n_parallel_pings) |
79 | { | |
80 | if (NParallelPingers != n_parallel_pings) | |
81 | { | |
82 | NParallelPingers = n_parallel_pings; | |
83 | reset_ping_counters(); | |
84 | } | |
85 | GlobalLogger.debug() << log_prefix() << "#pingers set"; | |
86 | } | |
87 | ||
88 | ||
a7b15639 CH |
89 | std::string HostStatus::log_prefix() |
90 | { | |
91 | std::stringstream temp; | |
92 | temp << "Stat(" << HostAddress << "): " | |
93 | << PingsFailedCount << " fail," << PingCongestionCount << " cong/" | |
94 | << PingsPerformedCount << " pings/" << ResolvedIpCount << "*" | |
95 | << NParallelPingers << " IPs: "; | |
242e5fb3 | 96 | return temp.str(); |
a7b15639 CH |
97 | } |
98 | ||
c01a6023 | 99 | /** |
6c14bbee | 100 | * @param resolved_ip_count The number of IPs resolved for the host. |
c01a6023 | 101 | */ |
6c14bbee | 102 | void HostStatus::set_resolved_ip_count( const int resolved_ip_count ) |
ddf41c89 | 103 | { |
838e0acf | 104 | BOOST_ASSERT( 0 <= resolved_ip_count ); |
ddf41c89 | 105 | |
db625177 CH |
106 | if (resolved_ip_count != ResolvedIpCount) |
107 | { // assume that the target has changed --> reset counters | |
108 | reset_ping_counters(); | |
109 | } | |
ddf41c89 | 110 | ResolvedIpCount = resolved_ip_count; |
3f7c921f | 111 | |
a7b15639 | 112 | GlobalLogger.debug() << log_prefix() << "#IPs set"; |
ddf41c89 GMF |
113 | } |
114 | ||
c01a6023 GMF |
115 | /** |
116 | * @return true if the amount of failed pings given to the host exceeded the | |
117 | * limit. | |
118 | */ | |
6c14bbee | 119 | bool HostStatus::exceeded_ping_failed_limit() const |
d8a91bd6 | 120 | { |
a341119a | 121 | return ExceededPingFailedLimit; |
d8a91bd6 GMF |
122 | } |
123 | ||
c01a6023 | 124 | /** |
a7b15639 CH |
125 | * @return true if the amount of congested pings given to the host exceeded the |
126 | * limit. | |
127 | */ | |
128 | bool HostStatus::exceeded_ping_congestion_limit() const | |
129 | { | |
130 | return ExceededPingCongestionLimit; | |
131 | } | |
132 | ||
133 | /** | |
96c4e7a4 CH |
134 | * Tells the status analyzer how the last ping went |
135 | * | |
136 | * @param result: status of ping specifying success/failure and reason of fail | |
137 | * @param ping_duration_us duration of ping in micro seconds | |
c01a6023 | 138 | */ |
96c4e7a4 CH |
139 | void HostStatus::update_ping_statistics( const PingStatus &result, |
140 | const long ping_duration_us ) | |
ddf41c89 | 141 | { |
242e5fb3 | 142 | float ping_duration_ms = static_cast<float>(ping_duration_us) / 1000.0f; |
96c4e7a4 | 143 | |
a7b15639 CH |
144 | GlobalLogger.debug() << log_prefix() << "add ping with result " |
145 | << to_string(result) << " which took " << ping_duration_ms << " ms"; | |
3f7c921f | 146 | |
ffa5cfe2 | 147 | BOOST_ASSERT( 0 <= ResolvedIpCount ); |
ddf41c89 GMF |
148 | BOOST_ASSERT( 0 <= PingsPerformedCount ); |
149 | BOOST_ASSERT( PingsFailedCount <= PingsPerformedCount ); | |
a7b15639 | 150 | BOOST_ASSERT( PingCongestionCount <= PingsPerformedCount ); |
ddf41c89 | 151 | |
a7b15639 CH |
152 | update_fail_stats( result ); |
153 | update_congestion_stats( result, ping_duration_us ); | |
2c10f87b | 154 | |
c5e4bfa1 GMF |
155 | // after we tried all IPs resolved for this host, we can analyze how many |
156 | // failed | |
157 | if ( tried_all_resolved_ip() ) | |
ddf41c89 | 158 | { |
d8a91bd6 | 159 | analyze_ping_statistics(); |
ddf41c89 | 160 | |
c5e4bfa1 | 161 | reset_ping_counters(); |
ddf41c89 GMF |
162 | } |
163 | ||
164 | BOOST_ASSERT( PingsFailedCount <= PingsPerformedCount ); | |
a7b15639 CH |
165 | BOOST_ASSERT( PingCongestionCount <= PingsPerformedCount ); |
166 | } | |
167 | ||
168 | ||
169 | void HostStatus::update_fail_stats( const PingStatus &result) | |
170 | { | |
171 | increase_ping_performed_count(); | |
172 | ||
173 | if ( result != PingStatus_SuccessReply | |
174 | && result != PingStatus_SuccessOutdatedIP) | |
175 | { | |
176 | increase_ping_failed_count(); | |
177 | } | |
178 | ||
179 | analyze_ping_failed_count(); | |
180 | } | |
181 | ||
182 | ||
183 | void HostStatus::update_congestion_stats( const PingStatus &result, | |
184 | const long ping_duration_us ) | |
185 | { | |
186 | if (ping_duration_us > PingDurationCongestionsThresh) | |
187 | increase_ping_congestion_count(); | |
188 | else if ( result == PingStatus_FailureTimeout ) | |
189 | increase_ping_congestion_count(); | |
190 | // PingStatus_FailureNoIP, PingStatus_SuccessOutdatedIP could also be caused | |
191 | // by congestion, but also by other reasons (e.g. firewall blocking port 53) | |
192 | ||
193 | analyze_ping_congestion_count(); | |
ddf41c89 GMF |
194 | } |
195 | ||
c1d776ba | 196 | |
6c14bbee | 197 | bool HostStatus::tried_all_resolved_ip() const |
d8a91bd6 | 198 | { |
ffa5cfe2 | 199 | BOOST_ASSERT( 0 < PingsPerformedCount ); |
d4793cc9 | 200 | |
ffa5cfe2 | 201 | return ( PingsPerformedCount >= ResolvedIpCount*NParallelPingers ); |
d8a91bd6 GMF |
202 | } |
203 | ||
6c14bbee | 204 | void HostStatus::analyze_ping_statistics() |
ddf41c89 | 205 | { |
c1fff16a | 206 | BOOST_ASSERT( !HostAddress.empty() ); |
ffa5cfe2 | 207 | BOOST_ASSERT( PingsPerformedCount >= ResolvedIpCount*NParallelPingers ); |
ddf41c89 | 208 | |
c1fff16a | 209 | // notify if the amount of pings that failed exceed the limit |
a341119a | 210 | if ( exceeded_ping_failed_limit() ) |
ddf41c89 | 211 | { |
a7b15639 | 212 | GlobalLogger.debug() << log_prefix() << "notify down"; |
fb469ffa | 213 | LinkAnalyzer->notify_host_down( HostAddress ); |
ddf41c89 GMF |
214 | } |
215 | else | |
216 | { | |
a7b15639 | 217 | GlobalLogger.debug() << log_prefix() << "notify up"; |
fb469ffa | 218 | LinkAnalyzer->notify_host_up( HostAddress ); |
ddf41c89 | 219 | } |
a7b15639 CH |
220 | |
221 | // nothing to do about congestion here, congestion is not forwarded to | |
222 | // central LinkAnalyzer | |
6fd0993e | 223 | } //lint !e1762 |
ddf41c89 | 224 | |
6c14bbee | 225 | void HostStatus::reset_ping_counters() |
c1fff16a GMF |
226 | { |
227 | PingsPerformedCount = 0; | |
228 | PingsFailedCount = 0; | |
a7b15639 | 229 | PingCongestionCount = 0; |
c1fff16a GMF |
230 | } |
231 | ||
6c14bbee | 232 | void HostStatus::increase_ping_performed_count() |
c5e4bfa1 GMF |
233 | { |
234 | ++PingsPerformedCount; | |
c1fff16a | 235 | |
ffa5cfe2 | 236 | BOOST_ASSERT( 0 < PingsPerformedCount ); |
c5e4bfa1 GMF |
237 | } |
238 | ||
6c14bbee | 239 | void HostStatus::increase_ping_failed_count() |
c5e4bfa1 GMF |
240 | { |
241 | ++PingsFailedCount; | |
c1fff16a GMF |
242 | |
243 | BOOST_ASSERT( ( 0 <= PingsFailedCount ) && ( PingsFailedCount <= PingsPerformedCount ) ); | |
c5e4bfa1 GMF |
244 | } |
245 | ||
a7b15639 CH |
246 | void HostStatus::increase_ping_congestion_count() |
247 | { | |
248 | ++PingCongestionCount; | |
249 | ||
250 | BOOST_ASSERT( ( 0 <= PingCongestionCount ) | |
251 | && ( PingCongestionCount <= PingsPerformedCount ) ); | |
252 | } | |
253 | ||
6c14bbee | 254 | void HostStatus::analyze_ping_failed_count() |
ddf41c89 | 255 | { |
cd4048df | 256 | BOOST_ASSERT( ( 0 <= PingFailLimitPercentage ) && ( PingFailLimitPercentage <= 100 ) ); |
c1fff16a GMF |
257 | BOOST_ASSERT( ( 0 <= PingsFailedCount ) && ( PingsFailedCount <= PingsPerformedCount ) ); |
258 | ||
91aa83f9 CH |
259 | int ping_fail_limit_count = ( ResolvedIpCount * PingFailLimitPercentage |
260 | * NParallelPingers) / 100; | |
c1fff16a | 261 | |
6827496c | 262 | // keep a boolean variable because the PingsFailedCount can be reseted |
cd4048df | 263 | if ( PingsFailedCount > ping_fail_limit_count ) |
1d7d7cb2 GMF |
264 | { |
265 | ExceededPingFailedLimit = true; | |
3f7c921f | 266 | |
a7b15639 CH |
267 | GlobalLogger.debug() << log_prefix() << "exceed fail limit=" |
268 | << ping_fail_limit_count; | |
1d7d7cb2 GMF |
269 | } |
270 | else | |
271 | { | |
272 | ExceededPingFailedLimit = false; | |
3f7c921f | 273 | |
a7b15639 CH |
274 | GlobalLogger.debug() << log_prefix() << "below fail limit=" |
275 | << ping_fail_limit_count; | |
276 | } | |
277 | } | |
278 | ||
279 | void HostStatus::analyze_ping_congestion_count() | |
280 | { | |
281 | BOOST_ASSERT( ( 0 <= PingCongestionLimitPercentage ) | |
282 | && ( PingCongestionLimitPercentage <= 100 ) ); | |
283 | BOOST_ASSERT( ( 0 <= PingCongestionCount ) | |
284 | && ( PingCongestionCount <= PingsPerformedCount ) ); | |
285 | ||
286 | int ping_congestion_limit_count = ( ResolvedIpCount * NParallelPingers | |
287 | * PingCongestionLimitPercentage ) / 100; | |
288 | ||
289 | // keep a boolean variable because the PingCongestionCount can be reseted | |
290 | if ( PingCongestionCount > ping_congestion_limit_count ) | |
291 | { | |
292 | ExceededPingCongestionLimit = true; | |
293 | ||
294 | GlobalLogger.debug() << log_prefix() << "exceed congestion limit=" | |
295 | << ping_congestion_limit_count; | |
296 | } | |
297 | else | |
298 | { | |
299 | ExceededPingCongestionLimit = false; | |
300 | ||
301 | GlobalLogger.debug() << log_prefix() << "below congestion limit=" | |
302 | << ping_congestion_limit_count; | |
1d7d7cb2 | 303 | } |
c5e4bfa1 | 304 | } |