func (c *Config) validateFilter() error {
if c.Filter == nil {
c.Filter = []filter.Rule{{Block: true}}
}
_, err := filter.New(c.Filter...)
if err != nil {
return fmt.Errorf("forwarder: %v", err)
}
return nil
}
func Filter(rules []filter.Rule) ([]filter.Rule, error) {
if rules == nil {
rules = []filter.Rule{{Block: true}}
return rules, nil
}
if n := len(rules); n > maxRules {
err := fmt.Errorf("too many filter rules defined (%d>%d)", n, maxRules)
return nil, err
}
_, err := filter.New(rules...)
if err != nil {
err := fmt.Errorf("error creating filter: %v", err)
return nil, err
}
return rules, nil
}
// ListenAndServe starts Statse listener that forwards incoming Statse messages
// to the aggregator.
func ListenAndServe(config *Config) error {
if err := config.Validate(); err != nil {
return err
}
filter, err := filter.New(config.Filter...)
if err != nil {
return err
}
l, err := statse.Listen(statse.ListenAddr)
if err != nil {
return err
}
defaultServer = &server{
dec: statse.NewDecoder(l),
filter: filter,
aggregator: aggregator.NewClient(config.AggregatorHost),
}
return defaultServer.loop()
}