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config.go
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/
config.go
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package main
import (
"net"
"os"
"time"
"gopkg.in/yaml.v2"
)
type Config struct {
configFilename string
configFileMtime time.Time
Listen map[string]Binding
Rules map[string][]RuleConfig `yaml:"rules"`
}
type Binding struct {
Address string
Port int
}
type RuleConfig struct {
Name string
Description string
Match MatchConfig
Then ThenConfig
}
type Network struct {
Network net.IPNet
}
func (n *Network) UnmarshalText(text []byte) error {
_, network, err := net.ParseCIDR(string(text))
n.Network = *network
return err
}
type MatchConfig struct {
QueryTypes []string `yaml:"query types"`
Patterns []string
SourceIps []string `yaml:"source ips"`
}
type AnsweredAddressConfig struct {
NotIn []string `yaml:"not in"`
// In []string `yaml:"in"`
}
type FilterConfig struct {
AnsweredAddress AnsweredAddressConfig `yaml:"answered address"`
}
type ThenConfig struct {
Action string
Targets []string
Filter FilterConfig
}
func (c *Config) Load(configfile string) error {
data, err := os.ReadFile(configfile)
if err != nil {
panic(err)
}
c.configFilename = configfile
fi, _ := os.Stat(c.configFilename)
c.configFileMtime = fi.ModTime()
return c.parse(data)
}
func (c *Config) Reload() (bool, error) {
fi, err := os.Stat(c.configFilename)
if err != nil {
return false, err
}
if c.configFileMtime == fi.ModTime() {
return false, nil
}
if err := c.Load(c.configFilename); err != nil {
return false, err
}
return true, nil
}
func (c *Config) parse(configdata []byte) error {
err := yaml.Unmarshal(configdata, &c)
return err
}
func (c *Config) CompileToRuleset() (*CompiledRuleSet, error) {
rs := CompiledRuleSet{}
if err := rs.ParseConfig(c); err != nil {
return nil, err
}
return &rs, nil
}