diff --git a/.gitignore b/.gitignore
index 8cf0451..25eee3f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -93,6 +93,9 @@ examples/fivewin/err.txt
.DS_Store
Thumbs.db
+# Rust (openmonitor)
+tools/openmonitor/target/
+
# Compiler / linker artefacts
*.obj
*.o
diff --git a/README.md b/README.md
index 55527c8..f10598c 100644
--- a/README.md
+++ b/README.md
@@ -1195,6 +1195,7 @@ OpenADS/
│ ├── import_dd/ # openads_import_dd — SAP .add → OpenADS import
│ │ └── main.cpp
│ ├── bench/ # openads_bench — synthetic SQL benchmark
+│ ├── openmonitor/ # openmonitor — TUI + web dashboard for openads_serverd
│ ├── harbour_patch/ # rddads compatibility patches + ADS baseline fixture
│ ├── scripts/
│ │ ├── systemd/ # openads-serverd.service (Linux)
diff --git a/tools/openmonitor/.cargo/config.toml b/tools/openmonitor/.cargo/config.toml
new file mode 100644
index 0000000..0c17df0
--- /dev/null
+++ b/tools/openmonitor/.cargo/config.toml
@@ -0,0 +1,2 @@
+[target.x86_64-pc-windows-msvc]
+rustflags = ["-C", "target-feature=+crt-static"]
\ No newline at end of file
diff --git a/tools/openmonitor/Cargo.lock b/tools/openmonitor/Cargo.lock
new file mode 100644
index 0000000..62193f4
--- /dev/null
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+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
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+ "zerofrom",
+]
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+ "synstructure",
+]
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+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/tools/openmonitor/Cargo.toml b/tools/openmonitor/Cargo.toml
new file mode 100644
index 0000000..534d977
--- /dev/null
+++ b/tools/openmonitor/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "openmonitor"
+version = "0.1.0"
+edition = "2021"
+description = "Console monitor for openads server (wire telemetry + HTTP sessions)"
+
+[[bin]]
+name = "openmonitor"
+path = "src/main.rs"
+
+[dependencies]
+anyhow = "1"
+axum = "0.8"
+chrono = { version = "0.4", default-features = false, features = ["clock"] }
+clap = { version = "4", features = ["derive"] }
+crossterm = "0.28"
+ratatui = "0.29"
+reqwest = { version = "0.12", features = ["blocking", "json"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["rt-multi-thread", "net"] }
+
+[profile.release]
+opt-level = "z"
+lto = true
+codegen-units = 1
+panic = "abort"
+strip = true
\ No newline at end of file
diff --git a/tools/openmonitor/README.md b/tools/openmonitor/README.md
new file mode 100644
index 0000000..e0e7286
--- /dev/null
+++ b/tools/openmonitor/README.md
@@ -0,0 +1,78 @@
+# openmonitor
+
+Terminal and web monitor for a running **openads server** (`openads_serverd`).
+
+Reads live telemetry from:
+
+- **Wire** — `MgRequest` / `MgSnapshot` (uptime, connections, open tables, packet counters)
+- **HTTP** — Studio API (`/api/health`, `/api/server/sessions`, kill session)
+
+Useful when developing Harbour / OpenADS clients over `tcp://` or debugging a local server instance.
+
+## Build
+
+Requires [Rust](https://rustup.rs/) (`cargo` on `PATH`). On Windows MSVC link tools are recommended for the static CRT build (Visual Studio Build Tools or `vcvars64.bat`).
+
+```bat
+cd tools\openmonitor
+build.bat
+```
+
+```sh
+cd tools/openmonitor
+cargo build --release
+```
+
+Binary: `target/release/openmonitor` (`.exe` on Windows).
+
+## Usage
+
+Start `openads_serverd` first, then:
+
+```text
+openmonitor --wire-port 16262 --http http://127.0.0.1:16263
+```
+
+One-shot snapshot (scripts / CI):
+
+```text
+openmonitor --wire-port 16262 --http http://127.0.0.1:16263 --once
+```
+
+Web dashboard (default bind `127.0.0.1:9850`):
+
+```text
+openmonitor --wire-port 16262 --http http://127.0.0.1:16263 --web
+```
+
+### Common flags
+
+| Flag | Default | Description |
+|------|---------|-------------|
+| `--wire-host` | `127.0.0.1` | openads server wire host |
+| `--wire-port` | `16262` | openads server wire port |
+| `--http` | — | Studio HTTP base URL (enables session list + kill in TUI) |
+| `--web` | off | Serve browser dashboard |
+| `--web-port` | `9850` | Web UI port |
+| `--once` | off | Print one snapshot and exit |
+| `--interval` | `2` | TUI refresh seconds |
+
+### TUI keys
+
+| Key | Action |
+|-----|--------|
+| `q` / `Esc` | Quit |
+| `r` | Refresh now |
+| `k` | Kill selected HTTP session (requires `--http`) |
+
+## Wireshark
+
+With the server listening on the wire port:
+
+```
+tcp.port == 16262
+```
+
+## Related
+
+Full local lab scripts (server launchers, optional Harbour probe) live in the companion repo [openads-wire-lab](https://github.com/Admnwk/openads-wire-lab).
\ No newline at end of file
diff --git a/tools/openmonitor/assets/dashboard.html b/tools/openmonitor/assets/dashboard.html
new file mode 100644
index 0000000..147ec94
--- /dev/null
+++ b/tools/openmonitor/assets/dashboard.html
@@ -0,0 +1,333 @@
+
+
+
+
+
+openmonitor
+
+
+
+
+
+
+
openmonitor
+
openads server
+
+ —
+
+
+
+
+
+
+
+
+
+ Atividade wire
+
+ Usuários wire
+ —
+
+
+ Sessões HTTP
+
+ Studio
+
+
+
+
+
= app
+ .inner
+ .http
+ .sessions
+ .iter()
+ .enumerate()
+ .map(|(i, s)| {
+ let style = if i == app.selected_session {
+ Style::default().bg(Color::DarkGray)
+ } else {
+ Style::default()
+ };
+ Row::new(vec![
+ Cell::from(s.id.to_string()),
+ Cell::from(format!("{}:{}", s.peer_ip, s.peer_port)),
+ Cell::from(s.user.clone()),
+ Cell::from(s.open_tables.to_string()),
+ Cell::from(format!("{}s", s.idle_secs)),
+ ])
+ .style(style)
+ })
+ .collect();
+ let hint = if app.inner.http.sessions.is_empty() {
+ "no HTTP sessions (start server with --http-port)"
+ } else {
+ "HTTP wire sessions"
+ };
+ Table::new(
+ rows,
+ [
+ Constraint::Length(6),
+ Constraint::Length(18),
+ Constraint::Min(10),
+ Constraint::Length(4),
+ Constraint::Length(6),
+ ],
+ )
+ .header(header)
+ .block(Block::default().borders(Borders::ALL).title(hint))
+}
+
+fn comm_panel(app: &TuiState) -> Paragraph<'_> {
+ let mut lines = Vec::new();
+ if let Some(s) = &app.inner.mg {
+ lines.push(Line::from(format!(
+ "Packets in/out {} / {}",
+ s.packets_in, s.packets_out
+ )));
+ lines.push(Line::from(format!(
+ "Bytes in/out {} / {}",
+ wire::format_bytes(s.bytes_in),
+ wire::format_bytes(s.bytes_out)
+ )));
+ lines.push(Line::from(format!(
+ "Disconnects {} Partial connects {}",
+ s.disconnects, s.partial_connects
+ )));
+ if !s.table_list.is_empty() {
+ lines.push(Line::from(Span::styled(
+ "Open tables (wire)",
+ Style::default().add_modifier(Modifier::UNDERLINED),
+ )));
+ for t in s.table_list.iter().take(5) {
+ lines.push(Line::from(format!(
+ " {} — {} (#{})",
+ t.name, t.user, t.conn_no
+ )));
+ }
+ }
+ }
+ if let Some(info) = &app.inner.http.server_info {
+ if let Some(v) = info.get("version").and_then(|v| v.as_str()) {
+ lines.push(Line::from(format!("Engine version {v}")));
+ }
+ if let Some(n) = info.get("tables").and_then(|v| v.as_array()) {
+ lines.push(Line::from(format!("Data tables (disk) {}", n.len())));
+ }
+ }
+ if let Some(e) = &app.inner.http.error {
+ lines.push(Line::from(Span::styled(
+ format!("HTTP: {e}"),
+ Style::default().fg(Color::Yellow),
+ )));
+ }
+ Paragraph::new(lines).block(
+ Block::default()
+ .borders(Borders::ALL)
+ .title("Communication / data"),
+ )
+}
\ No newline at end of file
diff --git a/tools/openmonitor/src/snapshot.rs b/tools/openmonitor/src/snapshot.rs
new file mode 100644
index 0000000..6237b39
--- /dev/null
+++ b/tools/openmonitor/src/snapshot.rs
@@ -0,0 +1,222 @@
+use crate::history::MetricHistory;
+use crate::http_api::{Health, HttpSnapshot, Session};
+use crate::wire::{self, MgSnapshot};
+use serde::Serialize;
+
+#[derive(Debug, Clone)]
+pub struct MonitorConfig {
+ pub wire_host: String,
+ pub wire_port: u16,
+ pub http: Option,
+ pub interval_secs: u64,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct SeriesView {
+ pub label: String,
+ pub values: Vec,
+ pub current: u64,
+ pub max: u64,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct WireUserView {
+ pub conn_no: u16,
+ pub name: String,
+ pub address: String,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct WireView {
+ pub online: bool,
+ pub error: Option,
+ pub uptime: Option,
+ pub connections: u32,
+ pub max_connections: u32,
+ pub users: u32,
+ pub max_users: u32,
+ pub tables: u32,
+ pub operations: u64,
+ pub packets_in: u64,
+ pub packets_out: u64,
+ pub bytes_in: String,
+ pub bytes_out: String,
+ pub rss: String,
+ pub listener_port: u16,
+ pub wire_users: Vec,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct HttpView {
+ pub configured: bool,
+ pub error: Option,
+ pub status: Option,
+ pub mode: Option,
+ pub data_dir: Option,
+ pub version: Option,
+ pub disk_tables: Option,
+ pub sessions: Vec,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct MonitorSnapshot {
+ pub wire_host: String,
+ pub wire_port: u16,
+ pub http_url: Option,
+ pub updated_at: String,
+ pub wire: WireView,
+ pub http: HttpView,
+ pub series: Vec,
+}
+
+pub struct MonitorState {
+ pub mg: Option,
+ pub mg_err: Option,
+ pub http: HttpSnapshot,
+ pub history: MetricHistory,
+}
+
+impl MonitorState {
+ pub fn refresh(&mut self, cfg: &MonitorConfig) {
+ match wire::fetch_mg_snapshot(&cfg.wire_host, cfg.wire_port) {
+ Ok(s) => {
+ self.history.push(&s);
+ self.mg = Some(s);
+ self.mg_err = None;
+ }
+ Err(e) => {
+ self.mg = None;
+ self.mg_err = Some(e.to_string());
+ }
+ }
+ if let Some(base) = &cfg.http {
+ self.http = crate::http_api::HttpClient::new(base).poll();
+ } else {
+ self.http = HttpSnapshot::default();
+ }
+ }
+
+ pub fn to_snapshot(&self, cfg: &MonitorConfig) -> MonitorSnapshot {
+ let wire = build_wire_view(&self.mg, &self.mg_err);
+ let http = build_http_view(&self.http, cfg.http.is_some());
+ let series = build_series(&self.history, &self.mg);
+ MonitorSnapshot {
+ wire_host: cfg.wire_host.clone(),
+ wire_port: cfg.wire_port,
+ http_url: cfg.http.clone(),
+ updated_at: chrono::Local::now().format("%H:%M:%S").to_string(),
+ wire,
+ http,
+ series,
+ }
+ }
+}
+
+fn build_wire_view(mg: &Option, err: &Option) -> WireView {
+ match mg {
+ Some(s) => WireView {
+ online: true,
+ error: None,
+ uptime: Some(wire::format_uptime(s.uptime_seconds)),
+ connections: s.connections,
+ max_connections: s.max_connections,
+ users: s.users,
+ max_users: s.max_users,
+ tables: s.tables,
+ operations: s.operations,
+ packets_in: s.packets_in,
+ packets_out: s.packets_out,
+ bytes_in: wire::format_bytes(s.bytes_in),
+ bytes_out: wire::format_bytes(s.bytes_out),
+ rss: wire::format_bytes(s.rss_bytes),
+ listener_port: s.server_port,
+ wire_users: s
+ .user_list
+ .iter()
+ .map(|u| WireUserView {
+ conn_no: u.conn_no,
+ name: u.name.clone(),
+ address: u.address.clone(),
+ })
+ .collect(),
+ },
+ None => WireView {
+ online: false,
+ error: err.clone(),
+ uptime: None,
+ connections: 0,
+ max_connections: 0,
+ users: 0,
+ max_users: 0,
+ tables: 0,
+ operations: 0,
+ packets_in: 0,
+ packets_out: 0,
+ bytes_in: "—".into(),
+ bytes_out: "—".into(),
+ rss: "—".into(),
+ listener_port: 0,
+ wire_users: vec![],
+ },
+ }
+}
+
+fn build_http_view(http: &HttpSnapshot, configured: bool) -> HttpView {
+ let health: Option<&Health> = http.health.as_ref();
+ HttpView {
+ configured,
+ error: http.error.clone(),
+ status: health.map(|h| h.status.clone()),
+ mode: health.map(|h| h.mode.clone()),
+ data_dir: health.map(|h| h.data_dir.clone()),
+ version: http
+ .server_info
+ .as_ref()
+ .and_then(|v| v.get("version"))
+ .and_then(|v| v.as_str())
+ .map(str::to_string),
+ disk_tables: http
+ .server_info
+ .as_ref()
+ .and_then(|v| v.get("tables"))
+ .and_then(|v| v.as_array())
+ .map(|a| a.len()),
+ sessions: http.sessions.clone(),
+ }
+}
+
+fn build_series(history: &MetricHistory, mg: &Option) -> Vec {
+ let max_conn = mg.as_ref().map(|s| s.max_connections as u64).unwrap_or(1);
+ let max_users = mg.as_ref().map(|s| s.max_users as u64).unwrap_or(1);
+ vec![
+ series_one("Conexões", history.connections(), max_conn),
+ series_one("Usuários", history.users(), max_users),
+ series_one(
+ "Ops/s",
+ history.ops_per_sec(),
+ MetricHistory::max_in(history.ops_per_sec()),
+ ),
+ series_one(
+ "Pkts/s",
+ history.pkt_per_sec(),
+ MetricHistory::max_in(history.pkt_per_sec()),
+ ),
+ series_one(
+ "RSS KB",
+ history.rss_kb(),
+ MetricHistory::max_in(history.rss_kb()),
+ ),
+ ]
+}
+
+fn series_one(label: &str, data: &[u64], scale_max: u64) -> SeriesView {
+ let values: Vec = if data.is_empty() { vec![0] } else { data.to_vec() };
+ let current = *values.last().unwrap_or(&0);
+ let peak = values.iter().copied().max().unwrap_or(1).max(scale_max).max(1);
+ SeriesView {
+ label: label.to_string(),
+ values,
+ current,
+ max: peak,
+ }
+}
\ No newline at end of file
diff --git a/tools/openmonitor/src/web.rs b/tools/openmonitor/src/web.rs
new file mode 100644
index 0000000..f475a7e
--- /dev/null
+++ b/tools/openmonitor/src/web.rs
@@ -0,0 +1,118 @@
+use crate::http_api::HttpClient;
+use crate::snapshot::{MonitorConfig, MonitorSnapshot, MonitorState};
+use anyhow::{Context, Result};
+use axum::{
+ extract::{Path, State},
+ http::StatusCode,
+ response::{Html, IntoResponse, Json},
+ routing::{get, post},
+ Router,
+};
+use std::sync::{Arc, RwLock};
+use std::thread;
+use std::time::Duration;
+use tokio::net::TcpListener;
+
+#[derive(Clone)]
+struct WebState {
+ cfg: MonitorConfig,
+ snap: Arc>,
+ poll: Arc>,
+}
+
+pub fn run(cfg: MonitorConfig, host: &str, port: u16) -> Result<()> {
+ let poll = Arc::new(RwLock::new(MonitorState {
+ mg: None,
+ mg_err: None,
+ http: Default::default(),
+ history: Default::default(),
+ }));
+
+ {
+ let mut state = poll.write().unwrap();
+ state.refresh(&cfg);
+ }
+
+ let initial = poll.read().unwrap().to_snapshot(&cfg);
+ let snap = Arc::new(RwLock::new(initial));
+ let web = WebState {
+ cfg: cfg.clone(),
+ snap: snap.clone(),
+ poll: poll.clone(),
+ };
+
+ let interval = Duration::from_secs(cfg.interval_secs.max(1));
+ let poller_cfg = cfg.clone();
+ thread::spawn(move || loop {
+ thread::sleep(interval);
+ if let Ok(mut state) = poll.write() {
+ state.refresh(&poller_cfg);
+ if let Ok(mut out) = snap.write() {
+ *out = state.to_snapshot(&poller_cfg);
+ }
+ }
+ });
+
+ let rt = tokio::runtime::Builder::new_multi_thread()
+ .enable_all()
+ .build()
+ .context("tokio runtime")?;
+
+ rt.block_on(async move {
+ let app = Router::new()
+ .route("/", get(index))
+ .route("/api/snapshot", get(api_snapshot))
+ .route("/api/sessions/{id}/kill", post(api_kill_session))
+ .with_state(web);
+
+ let addr = format!("{host}:{port}");
+ let listener = TcpListener::bind(&addr)
+ .await
+ .with_context(|| format!("bind web UI {addr}"))?;
+ eprintln!("[openmonitor] web UI http://{addr}/");
+ axum::serve(listener, app)
+ .await
+ .context("axum serve")?;
+ Ok::<(), anyhow::Error>(())
+ })?;
+
+ Ok(())
+}
+
+async fn index() -> Html<&'static str> {
+ Html(include_str!("../assets/dashboard.html"))
+}
+
+async fn api_snapshot(State(st): State) -> Json {
+ Json(st.snap.read().unwrap().clone())
+}
+
+async fn api_kill_session(
+ State(st): State,
+ Path(id): Path,
+) -> impl IntoResponse {
+ let Some(base) = st.cfg.http.clone() else {
+ return (StatusCode::BAD_REQUEST, "monitor started without --http").into_response();
+ };
+ let poll = st.poll.clone();
+ let snap = st.snap.clone();
+ let cfg = st.cfg.clone();
+ let res = tokio::task::spawn_blocking(move || {
+ let client = HttpClient::new(&base);
+ client.kill_session(id).map(|_| {
+ if let Ok(mut state) = poll.write() {
+ state.refresh(&cfg);
+ if let Ok(mut out) = snap.write() {
+ *out = state.to_snapshot(&cfg);
+ }
+ }
+ })
+ })
+ .await;
+
+ match res {
+ Ok(Ok(())) => StatusCode::OK.into_response(),
+ Ok(Err(e)) => (StatusCode::BAD_GATEWAY, e.to_string()).into_response(),
+ Err(e) => (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()).into_response(),
+ }
+}
\ No newline at end of file
diff --git a/tools/openmonitor/src/wire.rs b/tools/openmonitor/src/wire.rs
new file mode 100644
index 0000000..7d8bb78
--- /dev/null
+++ b/tools/openmonitor/src/wire.rs
@@ -0,0 +1,235 @@
+use anyhow::{anyhow, Context, Result};
+use std::io::{Read, Write};
+use std::net::TcpStream;
+use std::time::Duration;
+
+const OPCODE_MG_REQUEST: u8 = 0xA2;
+const OPCODE_MG_REPLY_ACK: u8 = 0xA3;
+
+#[derive(Debug, Clone, Default)]
+pub struct MgUser {
+ pub name: String,
+ pub address: String,
+ pub os_login: String,
+ pub conn_no: u16,
+ pub connected_at: u64,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct MgTable {
+ pub name: String,
+ pub user: String,
+ pub conn_no: u16,
+ pub open_mode: u16,
+ pub lock_type: u16,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct MgSnapshot {
+ pub users: u32,
+ pub connections: u32,
+ pub workareas: u32,
+ pub tables: u32,
+ pub indexes: u32,
+ pub locks: u32,
+ pub worker_threads: u32,
+ pub server_type: u16,
+ pub rss_bytes: u64,
+ pub server_port: u16,
+ pub uptime_seconds: u64,
+ pub packets_in: u64,
+ pub packets_out: u64,
+ pub bytes_in: u64,
+ pub bytes_out: u64,
+ pub disconnects: u64,
+ pub partial_connects: u64,
+ pub operations: u64,
+ pub logged_errors: u64,
+ pub max_users: u32,
+ pub max_connections: u32,
+ pub user_list: Vec,
+ pub table_list: Vec,
+}
+
+struct Reader<'a> {
+ data: &'a [u8],
+ pos: usize,
+}
+
+impl<'a> Reader<'a> {
+ fn new(data: &'a [u8]) -> Self {
+ Self { data, pos: 0 }
+ }
+
+ fn remaining(&self) -> usize {
+ self.data.len().saturating_sub(self.pos)
+ }
+
+ fn u16(&mut self) -> Result {
+ if self.remaining() < 2 {
+ return Err(anyhow!("truncated u16"));
+ }
+ let v = u16::from_le_bytes([self.data[self.pos], self.data[self.pos + 1]]);
+ self.pos += 2;
+ Ok(v)
+ }
+
+ fn u32(&mut self) -> Result {
+ if self.remaining() < 4 {
+ return Err(anyhow!("truncated u32"));
+ }
+ let mut buf = [0u8; 4];
+ buf.copy_from_slice(&self.data[self.pos..self.pos + 4]);
+ self.pos += 4;
+ Ok(u32::from_le_bytes(buf))
+ }
+
+ fn u64(&mut self) -> Result {
+ if self.remaining() < 8 {
+ return Err(anyhow!("truncated u64"));
+ }
+ let mut buf = [0u8; 8];
+ buf.copy_from_slice(&self.data[self.pos..self.pos + 8]);
+ self.pos += 8;
+ Ok(u64::from_le_bytes(buf))
+ }
+
+ fn str(&mut self) -> Result {
+ let n = self.u16()? as usize;
+ if self.remaining() < n {
+ return Err(anyhow!("truncated string"));
+ }
+ let s = std::str::from_utf8(&self.data[self.pos..self.pos + n])
+ .context("invalid utf-8 in mg snapshot")?
+ .to_string();
+ self.pos += n;
+ Ok(s)
+ }
+}
+
+pub fn decode_mg_snapshot(payload: &[u8]) -> Result {
+ let mut r = Reader::new(payload);
+ let mut s = MgSnapshot::default();
+ s.users = r.u32()?;
+ s.connections = r.u32()?;
+ s.workareas = r.u32()?;
+ s.tables = r.u32()?;
+ s.indexes = r.u32()?;
+ s.locks = r.u32()?;
+ s.worker_threads = r.u32()?;
+ s.server_type = r.u16()?;
+ s.rss_bytes = r.u64()?;
+ s.server_port = r.u16()?;
+ s.uptime_seconds = r.u64()?;
+ s.packets_in = r.u64()?;
+ s.packets_out = r.u64()?;
+ s.bytes_in = r.u64()?;
+ s.bytes_out = r.u64()?;
+ s.disconnects = r.u64()?;
+ s.partial_connects = r.u64()?;
+ s.operations = r.u64()?;
+ s.logged_errors = r.u64()?;
+ s.max_users = r.u32()?;
+ s.max_connections = r.u32()?;
+ let _ = r.u32()?;
+ let _ = r.u32()?;
+ let _ = r.u32()?;
+ let _ = r.u32()?;
+
+ let nu = r.u32()?;
+ for _ in 0..nu {
+ s.user_list.push(MgUser {
+ name: r.str()?,
+ address: r.str()?,
+ os_login: r.str()?,
+ conn_no: r.u16()?,
+ connected_at: r.u64()?,
+ });
+ }
+ let nt = r.u32()?;
+ for _ in 0..nt {
+ s.table_list.push(MgTable {
+ name: r.str()?,
+ user: r.str()?,
+ conn_no: r.u16()?,
+ open_mode: r.u16()?,
+ lock_type: r.u16()?,
+ });
+ }
+ Ok(s)
+}
+
+fn write_frame(stream: &mut TcpStream, opcode: u8, payload: &[u8]) -> Result<()> {
+ let len = payload.len() as u32;
+ let mut header = [0u8; 5];
+ header[0..4].copy_from_slice(&len.to_be_bytes());
+ header[4] = opcode;
+ stream
+ .write_all(&header)
+ .context("write frame header")?;
+ if !payload.is_empty() {
+ stream.write_all(payload).context("write frame payload")?;
+ }
+ Ok(())
+}
+
+fn read_frame(stream: &mut TcpStream) -> Result<(u8, Vec)> {
+ let mut header = [0u8; 5];
+ stream
+ .read_exact(&mut header)
+ .context("read frame header")?;
+ let len = u32::from_be_bytes([header[0], header[1], header[2], header[3]]) as usize;
+ if len > 16 * 1024 * 1024 {
+ return Err(anyhow::anyhow!(
+ "frame length {len} exceeds maximum limit of 16MB"
+ ));
+ }
+ let opcode = header[4];
+ let mut payload = vec![0u8; len];
+ if len > 0 {
+ stream
+ .read_exact(&mut payload)
+ .context("read frame payload")?;
+ }
+ Ok((opcode, payload))
+}
+
+pub fn fetch_mg_snapshot(host: &str, port: u16) -> Result {
+ let addr = format!("{host}:{port}");
+ let mut stream = TcpStream::connect(&addr).with_context(|| format!("connect {addr}"))?;
+ stream.set_read_timeout(Some(Duration::from_secs(5)))?;
+ stream.set_write_timeout(Some(Duration::from_secs(5)))?;
+
+ // Snapshot request: kind=0x01, arg=0
+ let req_payload = [0x01u8, 0x00, 0x00];
+ write_frame(&mut stream, OPCODE_MG_REQUEST, &req_payload)?;
+
+ let (opcode, payload) = read_frame(&mut stream)?;
+ if opcode != OPCODE_MG_REPLY_ACK {
+ return Err(anyhow!("unexpected mg reply opcode 0x{opcode:02X}"));
+ }
+ decode_mg_snapshot(&payload)
+}
+
+pub fn format_uptime(secs: u64) -> String {
+ let days = secs / 86_400;
+ let hours = (secs % 86_400) / 3_600;
+ let mins = (secs % 3_600) / 60;
+ let s = secs % 60;
+ format!("{days}d {hours}h {mins}m {s}s")
+}
+
+pub fn format_bytes(n: u64) -> String {
+ const KB: u64 = 1024;
+ const MB: u64 = KB * 1024;
+ const GB: u64 = MB * 1024;
+ if n >= GB {
+ format!("{:.2} GB", n as f64 / GB as f64)
+ } else if n >= MB {
+ format!("{:.2} MB", n as f64 / MB as f64)
+ } else if n >= KB {
+ format!("{:.1} KB", n as f64 / KB as f64)
+ } else {
+ format!("{n} B")
+ }
+}
\ No newline at end of file