diff --git a/src/plugin/callback_ext.rs b/src/plugin/callback_ext.rs
index 0e4425a9c..ff78ca7ff 100644
--- a/src/plugin/callback_ext.rs
+++ b/src/plugin/callback_ext.rs
@@ -3,7 +3,7 @@
 // -----------------------------------------------------------------------------
 
 use super::*;
-use std::{ffi::c_void, ptr::null, str::FromStr};
+use std::{ffi::c_void, ptr::null};
 
 const EXT_SUPPORT_BLOCK_INPUT: &str = "block-input";
 
@@ -18,21 +18,17 @@ pub(super) fn ext_support_callback(
             // let supported = supported_plugins.contains(&id);
             let supported = true;
             if supported {
-                match bool::from_str(&msg.data) {
-                    Ok(block) => {
-                        if crate::server::plugin_block_input(peer, block) == block {
-                            null()
-                        } else {
-                            make_return_code_msg(
-                                errno::ERR_CALLBACK_FAILED,
-                                "Failed to block input",
-                            )
-                        }
-                    }
-                    Err(err) => make_return_code_msg(
+                if msg.data.len() != 1 {
+                    return make_return_code_msg(
                         errno::ERR_CALLBACK_INVALID_ARGS,
-                        &format!("Failed to parse data: {}", err),
-                    ),
+                        "Invalid data length",
+                    );
+                }
+                let block = msg.data[0] != 0;
+                if crate::server::plugin_block_input(peer, block) == block {
+                    null()
+                } else {
+                    make_return_code_msg(errno::ERR_CALLBACK_FAILED, "Failed to block input")
                 }
             } else {
                 make_return_code_msg(
diff --git a/src/plugin/callback_msg.rs b/src/plugin/callback_msg.rs
index 7ed4cf589..39abca67a 100644
--- a/src/plugin/callback_msg.rs
+++ b/src/plugin/callback_msg.rs
@@ -56,7 +56,7 @@ struct MsgToConfig {
 #[derive(Debug, Deserialize)]
 pub(super) struct MsgToExtSupport {
     pub r#type: String,
-    pub data: String,
+    pub data: Vec<u8>,
 }
 
 macro_rules! cb_msg_field {
diff --git a/src/plugin/errno.rs b/src/plugin/errno.rs
index eda53f2f2..410df5132 100644
--- a/src/plugin/errno.rs
+++ b/src/plugin/errno.rs
@@ -10,13 +10,18 @@ pub const ERR_RUSTDESK_HANDLE_BASE: i32 = 10000;
 // not loaded
 pub const ERR_PLUGIN_LOAD: i32 = 10001;
 // not initialized
-pub const ERR_PLUGIN_MSG_CB: i32 = 10101;
+pub const ERR_PLUGIN_MSG_INIT: i32 = 10101;
+pub const ERR_PLUGIN_MSG_INIT_INVALID: i32 = 10102;
+pub const ERR_PLUGIN_MSG_GET_LOCAL_PEER_ID: i32 = 10103;
 // invalid
-pub const ERR_CALL_INVALID_METHOD: i32 = 10201;
-pub const ERR_CALL_NOT_SUPPORTED_METHOD: i32 = 10202;
+pub const ERR_CALL_UNIMPLEMENTED: i32 = 10201;
+pub const ERR_CALL_INVALID_METHOD: i32 = 10202;
+pub const ERR_CALL_NOT_SUPPORTED_METHOD: i32 = 10203;
+pub const ERR_CALL_INVALID_PEER: i32 = 10204;
 // failed on calling
 pub const ERR_CALL_INVALID_ARGS: i32 = 10301;
 pub const ERR_PEER_ID_MISMATCH: i32 = 10302;
+pub const ERR_CALL_CONFIG_VALUE: i32 = 10303;
 // no handlers on calling
 pub const ERR_NOT_HANDLED: i32 = 10401;
 
@@ -38,6 +43,6 @@ pub const ERR_CALLBACK_FAILED: i32 = 21001;
 
 pub const ERR_PLUGIN_HANDLE_BASE: i32 = 30000;
 
-pub const EER_CALL_FAILED: i32 = 300021;
+pub const EER_CALL_FAILED: i32 = 30021;
 pub const ERR_PEER_ON_FAILED: i32 = 40012;
 pub const ERR_PEER_OFF_FAILED: i32 = 40012;