netbirdio/netbird · error

decrement counter: %w

Error message

decrement counter: %w

What it means

Error "decrement counter: %w" thrown in netbirdio/netbird.

Source

Thrown at client/firewall/iptables/router_linux.go:225

		if err := r.decrementSetCounter(rule); err != nil {
			return fmt.Errorf("decrement ipset counter: %w", err)
		}
	} else {
		log.Debugf("route rule %s not found", ruleKey)
	}

	r.updateState()

	return nil
}

func (r *router) decrementSetCounter(rule []string) error {
	sets := r.findSets(rule)
	var merr *multierror.Error
	for _, setName := range sets {
		if _, err := r.ipsetCounter.Decrement(setName); err != nil {
			merr = multierror.Append(merr, fmt.Errorf("decrement counter: %w", err))
		}
	}

	return nberrors.FormatErrorOrNil(merr)
}

func (r *router) findSets(rule []string) []string {
	var sets []string
	for i, arg := range rule {
		if arg == "-m" && i+3 < len(rule) && rule[i+1] == "set" && rule[i+2] == matchSet {
			sets = append(sets, rule[i+3])
		}
	}
	return sets
}

func (r *router) createIpSet(setName string, sources []netip.Prefix) error {
	if err := r.createIPSet(setName); err != nil {

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/firewall/iptables/router_linux.go:225 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of netbirdio/netbird@93e97f4bf1 (2026-08-16). Data as JSON: /api/errors/a800e7e84a8c2aae. Report an issue: GitHub.