feat: support ipv4

README.md

@@ -0,0 +1,32 @@
+# CF-DDNS
+ddns service for Cloudflare. Currently only supports A and AAAA records.
+
+## Usage
+
+This is a WIP project, so no install script is provided yet. You can use the systemd files as a reference to setup your own service.
+
+### Configuration
+cf-ddns is configured using a json file. The default location is `/etc/cf-ddns/config.json`. You can specify a different location using the `-c` flag.
+
+```json
+{
+  "cloudflare": {
+    "token": "...", // Cloudflare API token, requires Zone.DNS.Edit permissions
+    "zoneId": "..."
+  },
+  "records": [
+    {
+      "name": "ddns.toledompm.xyz",
+      "proxy": true
+    },
+  ],
+  "ipv6": {
+    "enabled": true,
+    "fetchAddress": "https://myexternalip.com/json" // URL to fetch IPv6 address from, must return a json object with an "ip" field.
+  },
+  "ipv4": {
+    "enabled": true,
+    "fetchAddress": "https://myexternalip.com/json"
+  }
+}
+```

cmd/ddns.go

@@ -19,22 +19,33 @@ var (
 		Short: "Cloudflare DDNS Updater",
 		Long:  `Cloudflare DDNS Updater is a simple tool to update Cloudflare DNS records with your current IP address.`,
 		Run: func(cmd *cobra.Command, args []string) {
-			ipv6, err := nw.GetIPV6()
-			if err != nil {
-				fmt.Printf("Error getting IP: %s\n", err)
-				os.Exit(1)
-			}
-
 			for _, record := range cfg.Records {
 				if cfg.IPV6.Enabled {
+					ipv6, err := nw.GetIPV6()
+					if err != nil {
+						fmt.Printf("Error getting IP: %s\n", err)
+						os.Exit(1)
+					}
+
 					err = cf.UpdateRecord(ipv6, record.Name, cfg.Cloudflare.ZoneID, record.Proxy, "AAAA")
 					if err != nil {
 						fmt.Printf("Error updating record: %s\n", err)
 						os.Exit(1)
 					}
-				} else {
-					fmt.Println("Only ipv6 is supported at this time")
-					os.Exit(1)
+				}
+
+				if cfg.IPV4.Enabled {
+					ipv4, err := nw.GetIPV4()
+					if err != nil {
+						fmt.Printf("Error getting IP: %s\n", err)
+						os.Exit(1)
+					}
+
+					err = cf.UpdateRecord(ipv4, record.Name, cfg.Cloudflare.ZoneID, record.Proxy, "A")
+					if err != nil {
+						fmt.Printf("Error updating record: %s\n", err)
+						os.Exit(1)
+					}
 				}
 			}
 		},
@@ -50,7 +61,7 @@ func Execute() {
 func init() {
 	cobra.OnInitialize(initConfig)
 
-	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "(required) path to config file")
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "/etc/cf-ddns/config.json", "(required) path to config file")
 }
 
 func initConfig() {
@@ -69,5 +80,5 @@ func initConfig() {
 	cfg = config.MustParseConfig(cfgFileBytes, cfg)
 
 	cf = handlers.NewCloudflare(cfg.Cloudflare.Token)
-	nw = handlers.NewNetwork(cfg.IPV6.FetchAddress)
+	nw = handlers.NewNetwork(cfg.IPV6.FetchAddress, cfg.IPV4.FetchAddress)
 }

config/config.go

@@ -26,6 +26,13 @@ type Config struct {
 		// FetchAddress is the URL to fetch the current IPV6 address
 		FetchAddress string `json:"fetchAddress"`
 	} `json:"ipv6"`
+
+	IPV4 struct {
+		// Enabled is a flag to enable or disable IPV4
+		Enabled bool `json:"enabled"`
+		// FetchAddress is the URL to fetch the current IPV4 address
+		FetchAddress string `json:"fetchAddress"`
+	} `json:"ipv4"`
 }
 
 func New() *Config {

handlers/network.go

@@ -8,24 +8,35 @@ import (
 
 type Network interface {
 	GetIPV6() (string, error)
+	GetIPV4() (string, error)
 }
 
 type ipResponse struct {
 	IP string `json:"ip"`
 }
 
-func NewNetwork(ipv6FetchAddress string) Network {
+func NewNetwork(ipv6FetchAddress string, ipv4FetchAddress string) Network {
 	return &NetworkHandler{
 		ipv6FetchAddress: ipv6FetchAddress,
+		ipv4FetchAddress: ipv4FetchAddress,
 	}
 }
 
 type NetworkHandler struct {
 	ipv6FetchAddress string
+	ipv4FetchAddress string
+}
+
+func (n *NetworkHandler) GetIPV4() (string, error) {
+	return getIP(n.ipv4FetchAddress)
 }
 
 func (n *NetworkHandler) GetIPV6() (string, error) {
-	httpResponse, err := http.Get(n.ipv6FetchAddress)
+	return getIP(n.ipv6FetchAddress)
+}
+
+func getIP(apiAddr string) (string, error) {
+	httpResponse, err := http.Get(apiAddr)
 	if err != nil {
 		return "", err
 	}