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)
var (
cfg *config.Config
ipv4Endpoint string
ipv6Endpoint string
// Logging
logOpts := log.Ldate | log.Ltime | log.LUTC | log.Lshortfile
logger = log.New(os.Stdout, "", logOpts)
logger.Println("PINGING dyndnsd ENDPOINT")
var configPath string
flag.StringVar(&configPath, "config", "", "Config file path")
flag.Parse()
if _, err := os.Stat(configPath); os.IsNotExist(err) {
fmt.Println("Config path does not exist. Aborting!\n")
flag.Usage()
os.Exit(3)
}
cfg = config.New(configPath)
cfg.Get("ipv4_endpoint", &ipv4Endpoint)
cfg.Get("ipv6_endpoint", &ipv6Endpoint)
}
// Do the update!
// Base URL
endpoint, err := buildEndpointUrl()
if err != nil {
logger.Println("Couldn't build endpoint URL")
logger.Printf("%s", err)
if ipv4Valid := net.ParseIP(ipv4); ipv4Valid == nil {
logger.Println("Invalid IPv4 address returned by endpoint")
logger.Printf("%s", err)
return
} else {
query := endpoint.Query()
query.Set("myip", ipv4Valid.String())
endpoint.RawQuery = query.Encode()
}
logger.Println("Couldn't retrieve IPv4 address")
logger.Printf("%s", err)
// Leave empty to skip
if len(ipv6Endpoint) > 0 {
if ipv6, err := getUrl(ipv6Endpoint); err == nil {
if ipv6Valid := net.ParseIP(ipv6); ipv6Valid == nil {
logger.Println("Invalid IPv6 address returned by endpoint")
logger.Printf("%s", err)
} else {
var ipv6String string
var usePrefix bool
cfg.Get("ipv6_use_prefix", &usePrefix)
ipMask := fmt.Sprintf("%s/%d", ipv6Valid.String(), 64)
if ipv6, network, err := net.ParseCIDR(ipMask); usePrefix && err == nil {
ipv6String = network.String()
ipv6String = strings.Replace(ipv6String, "/64", "1", 1)
} else {
ipv6String = ipv6.String()
}
query := endpoint.Query()
query.Set("myip6", ipv6String)
endpoint.RawQuery = query.Encode()
}
} else {
logger.Println("Couldn't retrieve IPv6 address")
logger.Printf("%s", err)
}
// Send the update
dyndns, err := getUrl(endpoint.String())
if err != nil {
logger.Println("Couldn't update dyndnsd endpoint")
logger.Printf("%s", err)
logger.Println("SUCCESS! Ping sent.")
logger.Printf("%s", dyndns)
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}
// Build endpoint URL from configuration
func buildEndpointUrl() (*url.URL, error) {
var username string
var password string
var protocol string
var host string
var port int
var path string
var hostname string
cfg.Get("username", &username)
cfg.Get("password", &password)
cfg.Get("protocol", &protocol)
cfg.Get("host", &host)
cfg.Get("port", &port)
cfg.Get("path", &path)
cfg.Get("dns_hostname", &hostname)
daemonUrl, err := url.Parse("")
if err != nil {
return nil, err
}
daemonUrl.Scheme = protocol
daemonUrl.Host = fmt.Sprintf("%s:%d", host, port)
daemonUrl.Path = path
userInfo := url.UserPassword(username, password)
daemonUrl.User = userInfo
query := daemonUrl.Query()
query.Set("hostname", hostname)
daemonUrl.RawQuery = query.Encode()
return daemonUrl, nil
}
// Retrieve given URL
func getUrl(url string) (string, error) {
resp, err := http.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
respBodyString := string(respBody)
return respBodyString, nil