From 1a06773cf7e10847fae7e08d4c223b8effa4e58c Mon Sep 17 00:00:00 2001
From: Vojtech Vilimek <vojtech.vilimek@nic.cz>
Date: Thu, 8 Feb 2024 10:43:54 +0100
Subject: [PATCH] YANG: trivial rust implementation of show memory

---
 yang/rust/.gitignore  |  2 ++
 yang/rust/Cargo.toml  |  9 +++++++
 yang/rust/src/main.rs | 60 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)
 create mode 100644 yang/rust/.gitignore
 create mode 100644 yang/rust/Cargo.toml
 create mode 100644 yang/rust/src/main.rs

diff --git a/yang/rust/.gitignore b/yang/rust/.gitignore
new file mode 100644
index 00000000..1e7caa9e
--- /dev/null
+++ b/yang/rust/.gitignore
@@ -0,0 +1,2 @@
+Cargo.lock
+target/
diff --git a/yang/rust/Cargo.toml b/yang/rust/Cargo.toml
new file mode 100644
index 00000000..ce3daa0a
--- /dev/null
+++ b/yang/rust/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = "1.0.196"
+serde_cbor = "0.11.2"
+serde_derive = "1.0.196"
diff --git a/yang/rust/src/main.rs b/yang/rust/src/main.rs
new file mode 100644
index 00000000..0890ef72
--- /dev/null
+++ b/yang/rust/src/main.rs
@@ -0,0 +1,60 @@
+use std::env;
+use std::fs::File;
+use serde_derive::Deserialize;
+
+#[derive(Debug, Deserialize)]
+struct Memory {
+    effective: u32,
+    overhead: u32,
+}
+
+#[derive(Debug, Deserialize)]
+struct ShowMemoryBody {
+    routing_tables: Memory,
+    route_attributes: Memory,
+    protocols: Memory,
+    current_config: Memory,
+    standby_memory: Memory,
+    total: Memory,
+}
+
+#[derive(Debug, Deserialize)]
+struct ShowMemory {
+    header: String,
+    body: ShowMemoryBody,
+}
+
+#[derive(Debug, Deserialize)]
+struct ShowMemoryMessage {
+    /* serde does not support prefix, so we use rename work-around */
+    #[serde(rename(deserialize = "show_memory:message"))]
+    message: ShowMemory,
+
+    /* for prefixing both Serializator and Deserializator, use:
+      #[serde(rename(serialize = "show_memory:message", deserialize = "show_memory:mesage"))]
+     */
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() < 2 {
+	println!("Usage: ./program {{show-memory-cbor-file}}");
+	return;
+    }
+
+    let mut file = File::open(&args[1]);
+
+    if file.is_err() {
+	println!("Error during openning file {} occured!", args[1].clone());
+	return;
+    }
+
+    let rep : Result<ShowMemoryMessage, _> = serde_cbor::from_reader(file.unwrap());
+    if let Ok(report) = rep {
+	println!("{:?}", report);
+    } else {
+	let err = rep.err().unwrap();
+	println!("Error {}", err);
+    }
+}