refactor: refine presentation of C2 channel modes

Author: jm33-m0

core/internal/cc/operator/cmd.go

@@ -510,16 +510,17 @@ func gen_agent_cmd() *cobra.Command {
 			}
 		}
 	}
+
 	genAgentCmd.Flags().StringP("cc", "", default_cc, "C2 server address (Required)")
-	genAgentCmd.Flags().StringP("c2-channel-mode", "", def.C2ChannelModeDefault, fmt.Sprintf("C2 channel wrapper mode. Available: %s", strings.Join(transport.AllC2ChannelModes(), ",")))
-	genAgentCmd.Flags().StringP("cc-http-port", "", live.RuntimeConfig.CCHTTPPort, "Port for plain HTTP C2 transport")
+	genAgentCmd.Flags().StringP("c2-channel-mode", "", def.C2ChannelModeDefault, fmt.Sprintf("C2 channel wrapper mode. Available: %s", strings.Join(transport.AllC2ChannelModesDetailed(), ";")))
+	genAgentCmd.Flags().StringP("cc-http-port", "", live.RuntimeConfig.CCHTTPPort, "Port for HTTP Polling/Beaconing C2 transport")
 	genAgentCmd.Flags().StringP("proxy", "", "", "Hard coded proxy URL for agent's C2 transport. Example: socks5://127.0.0.1:9050")
 	genAgentCmd.Flags().StringP("cdn", "", "", "CDN proxy to reach C2. Example: wss://cdn.example.com/ws")
 	genAgentCmd.Flags().StringP("doh", "", "", "DNS over HTTPS server to use for DNS resolution. Example: https://1.1.1.1/dns-query")
 	genAgentCmd.Flags().BoolP("kcp", "", false, "Use KCP (secure UDP multiplexed tunnel)")
 	addFlagToGroup("C2 Transport Options", "cc", "c2-channel-mode", "cc-http-port", "proxy", "cdn", "doh", "kcp")
 
-	// Group 3: Beaconing (Polling Mode Only)
+	// Group 3: Beaconing (Polling/Beaconing Mode Only)
 	genAgentCmd.Flags().IntP("interval", "i", 60, "C2 beacon interval in seconds")
 	genAgentCmd.Flags().IntP("jitter", "j", 20, "C2 beacon jitter percentage (0-100)")
 	addFlagToGroup("Beaconing Options (HTTP Mode)", "interval", "jitter")

core/internal/transport/c2channel_http.go

@@ -618,5 +618,5 @@ func (s *HTTPServerStream) Close() error {
 }
 
 func init() {
-	RegisterC2Channel("http_poll", "Plain HTTP/1.1 stateless polling wrapper", &HTTPChannelWrapper{})
+	RegisterC2Channel("http_poll", "HTTP/1.1 stateless polling wrapper. Use `https://` to enable TLS", &HTTPChannelWrapper{})
 }

core/internal/transport/c2transport.go

@@ -74,6 +74,19 @@ func AllC2ChannelModes() []string {
 	return names
 }
 
+func AllC2ChannelModesDetailed() []string {
+	descriptions := []string{}
+	// Get C2 channel descriptions
+	C2Channels.Range(func(key, value any) bool {
+		descriptor := value.(C2ChannelDescriptor)
+		description := fmt.Sprintf("%s: %s", descriptor.Name, descriptor.Description)
+		descriptions = append(descriptions, description)
+		return true
+	})
+	sort.Strings(descriptions)
+	return descriptions
+}
+
 // GenericStreamTransport adapts a raw ReadWriteCloser to the StreamTransport interface.
 // It intentionally exposes only byte-stream semantics to higher protocol layers.
 type GenericStreamTransport struct {