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// SPDX-License-Identifier: GPL-3.0-or-later
package dnsmasq_dhcp
import (
_ "embed"
"errors"
"net"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/iprange"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("dnsmasq_dhcp", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
})
}
func New() *DnsmasqDHCP {
return &DnsmasqDHCP{
Config: Config{
// debian defaults
LeasesPath: "/var/lib/misc/dnsmasq.leases",
ConfPath: "/etc/dnsmasq.conf",
ConfDir: "/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new",
},
charts: charts.Copy(),
parseConfigEvery: time.Minute,
cacheDHCPRanges: make(map[string]bool),
mx: make(map[string]int64),
}
}
type Config struct {
UpdateEvery int `yaml:"update_every" json:"update_every"`
LeasesPath string `yaml:"leases_path" json:"leases_path"`
ConfPath string `yaml:"conf_path" json:"conf_path"`
ConfDir string `yaml:"conf_dir" json:"conf_dir"`
}
type DnsmasqDHCP struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
leasesModTime time.Time
parseConfigTime time.Time
parseConfigEvery time.Duration
dhcpRanges []iprange.Range
dhcpHosts []net.IP
cacheDHCPRanges map[string]bool
mx map[string]int64
}
func (d *DnsmasqDHCP) Configuration() any {
return d.Config
}
func (d *DnsmasqDHCP) Init() error {
if err := d.validateConfig(); err != nil {
d.Errorf("config validation: %v", err)
return err
}
if err := d.checkLeasesPath(); err != nil {
d.Errorf("leases path check: %v", err)
return err
}
return nil
}
func (d *DnsmasqDHCP) Check() error {
mx, err := d.collect()
if err != nil {
d.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (d *DnsmasqDHCP) Charts() *module.Charts {
return d.charts
}
func (d *DnsmasqDHCP) Collect() map[string]int64 {
mx, err := d.collect()
if err != nil {
d.Error(err)
}
if len(mx) == 0 {
return nil
}
return mx
}
func (d *DnsmasqDHCP) Cleanup() {}
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