Function hostsToIPStrings

vpn/tunnel.go:710–722

hostsToIPStrings returns a slice of all unique IP addresses in the values of the given map.

(hosts map[dnsname.FQDN][]netip.Addr)

// hostsToIPStrings returns a slice of all unique IP addresses in the values
// of the given map.
func hostsToIPStrings(hosts map[dnsname.FQDN][]netip.Addr) []string {
	seen := make(map[netip.Addr]struct{})
	var result []string
	for _, inner := range hosts {
		for _, elem := range inner {
			if _, exists := seen[elem]; !exists {
				seen[elem] = struct{}{}
				result = append(result, elem.String())
			}
		}
	}
	return result
}

// the following are taken from sloghuman: