| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package chrony |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "net" |
| 8 | ) |
| 9 | |
| 10 | func (c *Collector) validateConfig() error { |
| 11 | if c.Address == "" { |
| 12 | return errors.New("empty 'address'") |
| 13 | } |
| 14 | return nil |
| 15 | } |
| 16 | |
| 17 | func (c *Collector) initChronycBinary() (chronyBinary, error) { |
| 18 | host, _, err := net.SplitHostPort(c.Address) |
| 19 | if err != nil { |
| 20 | return nil, err |
| 21 | } |
| 22 | |
| 23 | // 'serverstats' allowed only through the Unix domain socket |
| 24 | if !isLocalhost(host) { |
| 25 | return nil, nil |
| 26 | } |
| 27 | |
| 28 | chronyc := newChronycExec(c.Timeout.Duration(), c.Logger) |
| 29 | |
| 30 | return chronyc, nil |
| 31 | } |
| 32 | |
| 33 | func isLocalhost(host string) bool { |
| 34 | ip := net.ParseIP(host) |
| 35 | return host == "localhost" || (ip != nil && ip.IsLoopback()) |
| 36 | } |