BREAKING: changes to CLI interface, moved to cobra CLI

To better support configuration and user friendliness, migrated to cobra based CLI.  The source tree structure has also changed to single go module, the server has been renamed hypd and client has been named hyp.  The original structure came into being organically, but now that the vision is more complete it's best to make these adjustments now.

hypd/cmd/generate.go

@@ -0,0 +1,18 @@
+/*
+Copyright © 2024 Steven Polley <himself@stevenpolley.net>
+*/
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+// generateCmd represents the generate command
+var generateCmd = &cobra.Command{
+	Use:   "generate",
+	Short: "Generates configuration for Hide Your Ports",
+}
+
+func init() {
+	rootCmd.AddCommand(generateCmd)
+}

hypd/cmd/root.go

@@ -0,0 +1,33 @@
+/*
+Copyright © 2024 Steven Polley <himself@stevenpolley.net>
+*/
+package cmd
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "hypd",
+	Short: "Hide Your Ports Daemon",
+	Long: `Hide Your Ports (hyp) is a combination of Port Knocking and One Time Passwords:
+
+hyp uses a pre-shared key distributed between the server and client, as well as the time
+to calculate a unique authentic knock sequence which is only valid for 90 seconds.`,
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+
+}

hypd/cmd/secret.go

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+/*
+Copyright © 2024 Steven Polley <himself@stevenpolley.net>
+*/
+package cmd
+
+import (
+	"fmt"
+
+	"deadbeef.codes/steven/hyp/otphyp"
+	"github.com/spf13/cobra"
+)
+
+// secretCmd represents the secret command
+var secretCmd = &cobra.Command{
+	Use:   "secret",
+	Short: "Generates a secret key for hyp",
+	Long: `Generates a secret for hyp which should be distributed to both the
+server and to clients.  
+
+Example:
+
+hypd generatesecret > hyp.secret`,
+	Run: func(cmd *cobra.Command, args []string) {
+		sharedSecret, err := otphyp.GenerateSecret()
+		if err != nil {
+			panic(fmt.Errorf("failed to generate shared secret: %w", err))
+		}
+		fmt.Println(sharedSecret)
+	},
+}
+
+func init() {
+	generateCmd.AddCommand(secretCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// secretCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// secretCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

hypd/cmd/server.go

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+/*
+Copyright © 2024 Steven Polley <himself@stevenpolley.net>
+*/
+package cmd
+
+import (
+	"fmt"
+
+	"deadbeef.codes/steven/hyp/hypd/server"
+	"github.com/spf13/cobra"
+)
+
+// serverCmd represents the server command
+var serverCmd = &cobra.Command{
+	Use:   "server <NIC>",
+	Args:  cobra.ExactArgs(1),
+	Short: "Runs hyp in server mode",
+	Long: `Runs the hyp server and begins capture on the NIC specified
+
+Example Usage:
+
+	# Linux - capture enp0s0
+	hyp server enp0s0
+
+	# Linux - capture eth0
+	hyp server eth0
+
+	# Windows - get-netadapter | where {$_.Name -eq “Ethernet”} | Select-Object -Property DeviceName
+	hyp.exe server "\\Device\\NPF_{A6F067DE-C2DC-4B4E-9C74-BE649C4C0F03}"
+
+	`,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := server.PacketServer(args[0])
+		if err != nil {
+			panic(fmt.Errorf("failed to start packet server: %w", err))
+		}
+
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(serverCmd)
+	/*
+		viper.SetConfigName("hypconfig")
+		viper.SetConfigType("yaml")
+		viper.AddConfigPath("/etc/hyp/")
+		viper.AddConfigPath("$HOME/.hyp")
+		viper.AddConfigPath(".")
+		viper.SetDefault("RefreshInterval", 7200)
+
+		if err := viper.ReadInConfig(); err != nil {
+			if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+				// Config file not found
+				// TBD: Implement
+			} else {
+				// Config file was found, but another error was produced
+				panic(fmt.Errorf("failed reading existing config file: %w", err))
+			}
+		}*/
+
+}