blob: 61d935adee875b02dc2a6b48d0ba3dca6835e8ea (
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
|
# no need for shebang - this file is loaded from charts.d.plugin
# netdata
# real-time performance and health monitoring, done right!
# (C) 2018 Costa Tsaousis <costa@tsaousis.gr>
# GPL v3+
#
# _update_every is a special variable - it holds the number of seconds
# between the calls of the _update() function
libreswan_update_every=1
# the priority is used to sort the charts on the dashboard
# 1 = the first chart
libreswan_priority=90000
# set to 1, to run ipsec with sudo
libreswan_sudo=1
# global variables to store our collected data
# [TUNNELID] = TUNNELNAME
# here we track the *latest* established tunnels
# as detected by: ipsec whack --status
declare -A libreswan_connected_tunnels=()
# [TUNNELID] = VALUE
# here we track values of all established tunnels (not only the latest)
# as detected by: ipsec whack --trafficstatus
declare -A libreswan_traffic_in=()
declare -A libreswan_traffic_out=()
declare -A libreswan_established_add_time=()
# [TUNNELNAME] = CHARTID
# here we remember CHARTIDs of all tunnels
# we need this to avoid converting tunnel names to chart IDs on every iteration
declare -A libreswan_tunnel_charts=()
# run the ipsec command
libreswan_ipsec() {
if [ ${libreswan_sudo} -ne 0 ]
then
sudo -n "${IPSEC_CMD}" "${@}"
return $?
else
"${IPSEC_CMD}" "${@}"
return $?
fi
}
# fetch latest values - fill the arrays
libreswan_get() {
# do all the work to collect / calculate the values
# for each dimension
# empty the variables
libreswan_traffic_in=()
libreswan_traffic_out=()
libreswan_established_add_time=()
libreswan_connected_tunnels=()
# convert the ipsec command output to a shell script
# and source it to get the values
source <(
{
libreswan_ipsec whack --status;
libreswan_ipsec whack --trafficstatus;
} | sed -n \
-e "s|[0-9]\+ #\([0-9]\+\): \"\(.*\)\".*IPsec SA established.*newest IPSEC.*|libreswan_connected_tunnels[\"\1\"]=\"\2\"|p" \
-e "s|[0-9]\+ #\([0-9]\+\): \"\(.*\)\",.* add_time=\([0-9]\+\),.* inBytes=\([0-9]\+\),.* outBytes=\([0-9]\+\).*|libreswan_traffic_in[\"\1\"]=\"\4\"; libreswan_traffic_out[\"\1\"]=\"\5\"; libreswan_established_add_time[\"\1\"]=\"\3\";|p"
) || return 1
# check we got some data
[ ${#libreswan_connected_tunnels[@]} -eq 0 ] && return 1
return 0
}
# _check is called once, to find out if this chart should be enabled or not
libreswan_check() {
# this should return:
# - 0 to enable the chart
# - 1 to disable the chart
require_cmd ipsec || return 1
# check that we can collect data
libreswan_get || return 1
return 0
}
# create the charts for an ipsec tunnel
libreswan_create_one() {
local n="${1}" name
name="${libreswan_connected_tunnels[${n}]}"
[ ! -z "${libreswan_tunnel_charts[${name}]}" ] && return 0
libreswan_tunnel_charts[${name}]="$(fixid "${name}")"
cat <<EOF
CHART libreswan.${libreswan_tunnel_charts[${name}]}_net '${name}_net' "LibreSWAN Tunnel ${name} Traffic" "kilobits/s" "${name}" libreswan.net area $((libreswan_priority)) $libreswan_update_every
DIMENSION in '' incremental 8 1000
DIMENSION out '' incremental -8 1000
CHART libreswan.${libreswan_tunnel_charts[${name}]}_uptime '${name}_uptime' "LibreSWAN Tunnel ${name} Uptime" "seconds" "${name}" libreswan.uptime line $((libreswan_priority + 1)) $libreswan_update_every
DIMENSION uptime '' absolute 1 1
EOF
return 0
}
# _create is called once, to create the charts
libreswan_create() {
local n
for n in "${!libreswan_connected_tunnels[@]}"
do
libreswan_create_one "${n}"
done
return 0
}
libreswan_now=$(date +%s)
# send the values to netdata for an ipsec tunnel
libreswan_update_one() {
local n="${1}" microseconds="${2}" name id uptime
name="${libreswan_connected_tunnels[${n}]}"
id="${libreswan_tunnel_charts[${name}]}"
[ -z "${id}" ] && libreswan_create_one "${name}"
uptime=$(( ${libreswan_now} - ${libreswan_established_add_time[${n}]} ))
[ ${uptime} -lt 0 ] && uptime=0
# write the result of the work.
cat <<VALUESEOF
BEGIN libreswan.${id}_net ${microseconds}
SET in = ${libreswan_traffic_in[${n}]}
SET out = ${libreswan_traffic_out[${n}]}
END
BEGIN libreswan.${id}_uptime ${microseconds}
SET uptime = ${uptime}
END
VALUESEOF
}
# _update is called continiously, to collect the values
libreswan_update() {
# the first argument to this function is the microseconds since last update
# pass this parameter to the BEGIN statement (see bellow).
libreswan_get || return 1
libreswan_now=$(date +%s)
local n
for n in "${!libreswan_connected_tunnels[@]}"
do
libreswan_update_one "${n}" "${@}"
done
return 0
}
|