89 lines
1.8 KiB
Go
89 lines
1.8 KiB
Go
package main
|
|
|
|
import (
|
|
"./backend"
|
|
"./config"
|
|
"./hosts"
|
|
"./web"
|
|
"flag"
|
|
"log"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
CmdBackend string = "backend"
|
|
CmdWeb string = "web"
|
|
)
|
|
|
|
var serviceConfig *config.Config
|
|
|
|
func init() {
|
|
flag.StringVar(&serviceConfig.Domain, "domain", "",
|
|
"The subdomain which should be handled by DDNS")
|
|
|
|
flag.StringVar(&serviceConfig.Listen, "listen", ":8080",
|
|
"Which socket should the web service use to bind itself")
|
|
|
|
flag.StringVar(&serviceConfig.RedisHost, "redis", ":6379",
|
|
"The Redis socket that should be used")
|
|
|
|
flag.StringVar(&serviceConfig.SOAFqdn, "soa_fqdn", "",
|
|
"The FQDN of the DNS server which is returned as a SOA record")
|
|
|
|
flag.IntVar(&serviceConfig.HostExpirationDays, "expiration-days", 10,
|
|
"The number of days after a host is released when it is not updated")
|
|
|
|
flag.BoolVar(&serviceConfig.Verbose, "verbose", false,
|
|
"Be more verbose")
|
|
}
|
|
|
|
func usage() {
|
|
log.Fatal("Usage: ./ddns [backend|web]")
|
|
}
|
|
|
|
func validateCommandArgs(cmd string) {
|
|
if serviceConfig.Domain == "" {
|
|
log.Fatal("You have to supply the domain via --domain=DOMAIN")
|
|
} else if !strings.HasPrefix(serviceConfig.Domain, ".") {
|
|
// get the domain in the right format
|
|
serviceConfig.Domain = "." + serviceConfig.Domain
|
|
}
|
|
|
|
if cmd == CmdBackend {
|
|
if serviceConfig.SOAFqdn == "" {
|
|
log.Fatal("You have to supply the server FQDN via --soa_fqdn=FQDN")
|
|
}
|
|
}
|
|
}
|
|
|
|
func prepareForExecution() string {
|
|
flag.Parse()
|
|
|
|
if len(flag.Args()) != 1 {
|
|
usage()
|
|
}
|
|
cmd := flag.Args()[0]
|
|
|
|
validateCommandArgs(cmd)
|
|
return cmd
|
|
}
|
|
|
|
func main() {
|
|
cmd := prepareForExecution()
|
|
|
|
redis := hosts.NewRedisBackend(serviceConfig)
|
|
defer redis.Close()
|
|
|
|
switch cmd {
|
|
case CmdBackend:
|
|
backend.NewPowerDnsBackend(serviceConfig, redis, os.Stdin, os.Stdout).Run()
|
|
|
|
case CmdWeb:
|
|
web.NewWebService(serviceConfig, redis).Run()
|
|
|
|
default:
|
|
usage()
|
|
}
|
|
}
|