blob: 470279a288ccb5ac480c4ff1984b88bde649535d (
plain)
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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* Module: lbdata.cc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <sys/time.h>
#include <time.h>
#include <iostream>
#include "lbdata.hh"
int LBHealthHistory::_buffer_size = 10;
/**
*
*
**/
void
LBHealth::put(int rtt)
{
int activity_ct = _hresults.push(rtt);
if (rtt == -1) {
if (activity_ct >= _failure_ct) {
if (_is_active == true) {
_state_changed = true;
}
_is_active = false;
}
}
else {
if (activity_ct >= _success_ct) {
if (_is_active == false) {
_state_changed = true;
}
_is_active = true;
}
}
}
/**
*
*
**/
LBHealthHistory::LBHealthHistory(int buffer_size) :
_last_success(0),
_last_failure(0),
_failure_count(0),
_index(0)
{
_resp_data.resize(10);
for (int i = 0; i < _buffer_size; ++i) {
_resp_data[i] = 0;
}
}
/**
*
*
**/
int
LBHealthHistory::push(int rtt)
{
struct timeval tv;
gettimeofday(&tv,NULL);
if (rtt == -1) {
_last_failure = tv.tv_sec;
++_failure_count;
}
else {
_failure_count = 0;
_last_success = tv.tv_sec;
}
_resp_data[_index % _buffer_size] = rtt;
++_index;
//compute count of sequence of same responses
int ct = 0;
int start_index = (_index - 1) % _buffer_size;
for (int i = 0; i < _buffer_size; ++i) {
int index = start_index - i;
if (index < 0) {
//handle wrap around of index here
index = _buffer_size - index;
}
if (_resp_data[index] == -1 && rtt == -1) {
++ct;
}
else if (_resp_data[index] != -1 && rtt != -1) {
++ct;
}
else {
break;
}
}
return ct;
}
/**
*
*
**/
bool
LBData::is_active(const string &iface)
{
InterfaceHealthIter iter = _iface_health_coll.find(iface);
if (iter != _iface_health_coll.end()) {
return iter->second._is_active;
}
return false;
}
/**
*
*
**/
void
LBData::dump()
{
cout << "health" << endl;
LBData::InterfaceHealthIter h_iter = _iface_health_coll.begin();
while (h_iter != _iface_health_coll.end()) {
cout << " " << h_iter->first << endl;
cout << " " << h_iter->second._success_ct << endl;
cout << " " << h_iter->second._failure_ct << endl;
cout << " " << h_iter->second._ping_target << endl;
cout << " " << h_iter->second._ping_resp_time << endl;
++h_iter;
}
cout << endl << "wan" << endl;
LBData::LBRuleIter r_iter = _lb_rule_coll.begin();
while (r_iter != _lb_rule_coll.end()) {
cout << " rule: " << r_iter->first << endl;
cout << " " << r_iter->second._proto << endl;
cout << " " << r_iter->second._s_addr << endl;
cout << " " << r_iter->second._s_port << endl;
cout << " " << r_iter->second._d_addr << endl;
cout << " " << r_iter->second._d_port << endl;
LBRule::InterfaceDistIter ri_iter = r_iter->second._iface_dist_coll.begin();
while (ri_iter != r_iter->second._iface_dist_coll.end()) {
cout << " interface: " << ri_iter->first << endl;
cout << " weight: " << ri_iter->second << endl;
++ri_iter;
}
++r_iter;
}
cout << "end dump" << endl;
}
/**
*
*
**/
bool
LBData::state_changed()
{
LBData::InterfaceHealthIter h_iter = _iface_health_coll.begin();
while (h_iter != _iface_health_coll.end()) {
if (h_iter->second.state_changed()) {
return true;
}
++h_iter;
}
return false;
}
/**
*
*
**/
void
LBData::reset_state_changed()
{
LBData::InterfaceHealthIter h_iter = _iface_health_coll.begin();
while (h_iter != _iface_health_coll.end()) {
h_iter->second._state_changed = false;
++h_iter;
}
}
|
