plugin_framework, add block input support

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/plugin/callback_ext.rs

@@ -0,0 +1,49 @@
+// External support for callback.
+// 1. Support block input for some plugins.
+// -----------------------------------------------------------------------------
+
+use super::*;
+use std::{ffi::c_void, ptr::null, str::FromStr};
+
+const EXT_SUPPORT_BLOCK_INPUT: &str = "block-input";
+
+pub(super) fn ext_support_callback(
+    id: &str,
+    peer: &str,
+    msg: &super::callback_msg::MsgToExtSupport,
+) -> *const c_void {
+    match &msg.r#type as _ {
+        EXT_SUPPORT_BLOCK_INPUT => {
+            // let supported_plugins = [];
+            // 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(
+                        errno::ERR_CALLBACK_INVALID_ARGS,
+                        &format!("Failed to parse data: {}", err),
+                    ),
+                }
+            } else {
+                make_return_code_msg(
+                    errno::ERR_CALLBACK_PLUGIN_ID,
+                    &format!("This operation is not supported for plugin '{}', please contact the RustDesk team for support.", id),
+                )
+            }
+        }
+        _ => make_return_code_msg(
+            errno::ERR_CALLBACK_TARGET_TYPE,
+            &format!("Unknown target type '{}'", &msg.r#type),
+        ),
+    }
+}