Add support for Dynu.com

README.md

@@ -44,6 +44,7 @@ Light container updating DNS A and/or AAAA records periodically for multiple DNS
   - Dreamhost
   - DuckDNS
   - DynDNS
+  - Dynu
   - FreeDNS
   - Gandi
   - GoDaddy
@@ -164,6 +165,7 @@ Check the documentation for your DNS provider:
 - [Dreamhost](https://github.com/qdm12/ddns-updater/blob/master/docs/dreamhost.md)
 - [DuckDNS](https://github.com/qdm12/ddns-updater/blob/master/docs/duckdns.md)
 - [DynDNS](https://github.com/qdm12/ddns-updater/blob/master/docs/dyndns.md)
+- [Dynu](https://github.com/qdm12/ddns-updater/blob/master/docs/dynu.md)
 - [DynV6](https://github.com/qdm12/ddns-updater/blob/master/docs/dynv6.md)
 - [FreeDNS](https://github.com/qdm12/ddns-updater/blob/master/docs/freedns.md)
 - [Gandi](https://github.com/qdm12/ddns-updater/blob/master/docs/gandi.md)

docs/dynu.md

@@ -0,0 +1,41 @@
+# Dynu
+
+## Configuration
+
+### Example
+
+```json
+{
+  "settings": [
+    {
+      "provider": "dynu",
+      "domain": "domain.com",
+      "host": "host",
+      "alias": "subdomain",
+      "location": "group",
+      "username": "username",
+      "password": "password",
+      "ip_version": "ipv4",
+      "provider_ip": true
+    }
+  ]
+}
+```
+
+### Compulsory parameters
+
+- `"domain"`
+- `"host"` is your host or `"@"` (@ allows to update all domains that has no group)
+- `"username"`
+- `"password"` could be plain text or password in MD5 or SHA256 format (There's also an option for setting a password for IP Update only)
+
+### Optional parameters
+
+- `"ip_version"` can be `ipv4` (A records) or `ipv6` (AAAA records), defaults to `ipv4 or ipv6`
+- `"provider_ip"` can be set to `true` to let your DNS provider determine your IPv4 address (and/or IPv6 address) automatically when you send an update request, without sending the new IP address detected by the program in the request.
+- `"alias"` Specify the subdomain you want to set the IP
+- `"location"` Specify the Group for which you want to set the IP (domains and subdomains in the same group on dynu)
+
+NOTE: `location` takes precedence over `alias`, so if you set `location` `alias` will do nothing
+
+## Domain setup

internal/settings/constants/providers.go

@@ -15,6 +15,7 @@ const (
 	Dreamhost    models.Provider = "dreamhost"
 	DuckDNS      models.Provider = "duckdns"
 	Dyn          models.Provider = "dyn"
+	Dynu         models.Provider = "dynu"
 	DynV6        models.Provider = "dynv6"
 	FreeDNS      models.Provider = "freedns"
 	Gandi        models.Provider = "gandi"
@@ -50,6 +51,7 @@ func ProviderChoices() []models.Provider {
 		Dreamhost,
 		DuckDNS,
 		Dyn,
+		Dynu,
 		DynV6,
 		FreeDNS,
 		Gandi,

internal/settings/errors/validation.go

@@ -21,6 +21,7 @@ var (
 	ErrHostOnlyAt              = errors.New(`host can only be "@"`)
 	ErrHostOnlySubdomain       = errors.New("host can only be a subdomain")
 	ErrHostWildcard            = errors.New(`host cannot be a "*"`)
+	ErrHostWithAlias           = errors.New("host cannot be @ if alias is set") // Dynu
 	ErrIPv6NotSupported        = errors.New("IPv6 is not supported by this provider")
 	ErrMalformedEmail          = errors.New("malformed email address")
 	ErrMalformedKey            = errors.New("malformed key")

internal/settings/providers/dynu/provider.go

@@ -0,0 +1,172 @@
+package dynu
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/qdm12/ddns-updater/internal/models"
+	"github.com/qdm12/ddns-updater/internal/settings/constants"
+	"github.com/qdm12/ddns-updater/internal/settings/errors"
+	"github.com/qdm12/ddns-updater/internal/settings/headers"
+	"github.com/qdm12/ddns-updater/internal/settings/utils"
+	"github.com/qdm12/ddns-updater/pkg/publicip/ipversion"
+)
+
+type provider struct {
+	domain        string
+	host          string
+	location      string
+	alias         string
+	ipVersion     ipversion.IPVersion
+	username      string
+	password      string
+	useProviderIP bool
+}
+
+func New(data json.RawMessage, domain, host string,
+	ipVersion ipversion.IPVersion) (p *provider, err error) {
+	extraSettings := struct {
+		Username      string `json:"username"`
+		Password      string `json:"password"`
+		UseProviderIP bool   `json:"provider_ip"`
+		Location      string `json:"location"`
+		Alias         string `json:"alias"`
+	}{}
+	if err := json.Unmarshal(data, &extraSettings); err != nil {
+		return nil, err
+	}
+	p = &provider{
+		domain:        domain,
+		host:          host,
+		ipVersion:     ipVersion,
+		location:      extraSettings.Location,
+		alias:         extraSettings.Alias,
+		username:      extraSettings.Username,
+		password:      extraSettings.Password,
+		useProviderIP: extraSettings.UseProviderIP,
+	}
+	if err := p.isValid(); err != nil {
+		return nil, err
+	}
+	return p, nil
+}
+
+func (p *provider) isValid() error {
+	switch {
+	case p.username == "":
+		return errors.ErrEmptyUsername
+	case p.password == "":
+		return errors.ErrEmptyPassword
+	case p.host == "*":
+		return errors.ErrHostWildcard
+	case p.alias != "" && p.host == "@":
+		return errors.ErrHostWithAlias
+	}
+	return nil
+}
+
+func (p *provider) String() string {
+	return utils.ToString(p.domain, p.Host(), constants.Dynu, p.ipVersion)
+}
+
+func (p *provider) Domain() string {
+	return p.domain
+}
+
+func (p *provider) Host() string {
+	if p.alias != "" {
+		return p.alias + "." + p.host
+	}
+	return p.host
+}
+
+func (p *provider) IPVersion() ipversion.IPVersion {
+	return p.ipVersion
+}
+
+func (p *provider) Proxied() bool {
+	return false
+}
+
+func (p *provider) BuildDomainName() string {
+	return utils.BuildDomainName(p.Host(), p.domain)
+}
+
+func (p *provider) HTML() models.HTMLRow {
+	return models.HTMLRow{
+		Domain:    models.HTML(fmt.Sprintf("<a href=\"http://%s\">%s</a>", p.BuildDomainName(), p.BuildDomainName())),
+		Host:      models.HTML(p.Host()),
+		Provider:  "<a href=\"https://dynu.com/\">Dynu</a>",
+		IPVersion: models.HTML(p.ipVersion.String()),
+	}
+}
+
+func (p *provider) Update(ctx context.Context, client *http.Client, ip net.IP) (newIP net.IP, err error) {
+	u := url.URL{
+		Scheme: "https",
+		Host:   "api.dynu.com",
+		Path:   "/nic/update",
+	}
+	values := url.Values{}
+	values.Set("username", p.username)
+	values.Set("password", p.password)
+	values.Set("location", p.location)
+	if p.host != "@" {
+		values.Set("hostname", utils.BuildURLQueryHostname(p.host, p.domain))
+	}
+	if p.alias != "" {
+		values.Set("alias", p.alias)
+	}
+	if !p.useProviderIP {
+		if ip.To4() == nil {
+			values.Set("myipv6", ip.String())
+		} else {
+			values.Set("myip", ip.String())
+		}
+	}
+	u.RawQuery = values.Encode()
+
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+	headers.SetUserAgent(request)
+
+	response, err := client.Do(request)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	b, err := io.ReadAll(response.Body)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %s", errors.ErrUnmarshalResponse, err)
+	}
+	s := string(b)
+
+	if response.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("%w: %d: %s",
+			errors.ErrBadHTTPStatus, response.StatusCode, utils.ToSingleLine(s))
+	}
+
+	switch {
+	case strings.Contains(s, constants.Badauth):
+		return nil, errors.ErrAuth
+	case strings.Contains(s, constants.Notfqdn):
+		return nil, errors.ErrHostnameNotExists
+	case strings.Contains(s, constants.Abuse):
+		return nil, errors.ErrAbuse
+	case strings.Contains(s, "good"):
+		return ip, nil
+	case strings.Contains(s, "nochg"): // Updated but not changed
+		return ip, nil
+	default:
+		return nil, fmt.Errorf("%w: %s", errors.ErrUnknownResponse, utils.ToSingleLine(s))
+	}
+}

internal/settings/settings.go

@@ -22,6 +22,7 @@ import (
 	"github.com/qdm12/ddns-updater/internal/settings/providers/dreamhost"
 	"github.com/qdm12/ddns-updater/internal/settings/providers/duckdns"
 	"github.com/qdm12/ddns-updater/internal/settings/providers/dyn"
+	"github.com/qdm12/ddns-updater/internal/settings/providers/dynu"
 	"github.com/qdm12/ddns-updater/internal/settings/providers/dynv6"
 	"github.com/qdm12/ddns-updater/internal/settings/providers/freedns"
 	"github.com/qdm12/ddns-updater/internal/settings/providers/gandi"
@@ -85,6 +86,8 @@ func New(provider models.Provider, data json.RawMessage, domain, host string,
 		return duckdns.New(data, domain, host, ipVersion, matcher)
 	case constants.Dyn:
 		return dyn.New(data, domain, host, ipVersion)
+	case constants.Dynu:
+		return dynu.New(data, domain, host, ipVersion)
 	case constants.DynV6:
 		return dynv6.New(data, domain, host, ipVersion)
 	case constants.FreeDNS: