Update LICENSING.md

Drafting licensing...

.github/workflows/release.yml

@@ -56,12 +56,11 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-${{ matrix.target }}-cargo-
 
+      - name: Install cross
+        run: cargo install cross --git https://github.com/cross-rs/cross
+
       - name: Build Release
-        uses: actions-rs/cargo@ae10961054e4aa8bff448f48a500763b90d5c550 # v1.0.1
+        run: cross build --release --target ${{ matrix.target }}
-        with:
-          use-cross: true
-          command: build
-          args: --release --target ${{ matrix.target }}
 
       - name: Package binary
         run: |
@@ -85,13 +84,42 @@ jobs:
       contents: write
 
     steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Download all artifacts
         uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
         with:
           path: artifacts
 
+      - name: Update version in Cargo.toml and Cargo.lock
+        run: |
+          # Extract version from tag (remove 'v' prefix if present)
+          VERSION="${GITHUB_REF#refs/tags/}"
+          VERSION="${VERSION#v}"
+          
+          # Install cargo-edit for version bumping
+          cargo install cargo-edit
+          
+          # Update Cargo.toml version
+          cargo set-version "$VERSION"
+          
+          # Configure git
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          
+          # Commit and push changes
+          git add Cargo.toml Cargo.lock
+          git commit -m "chore: bump version to $VERSION" || echo "No changes to commit"
+          git push origin HEAD:main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Create Release
-        uses: softprops/action-gh-release@c95fe1489396fe360a41fb53f90de6ddce8c4c8a # v2.2.1
+        uses: softprops/action-gh-release@v2
         with:
           files: artifacts/**/*
           generate_release_notes: true

CONTRIBUTING.md

@@ -0,0 +1,5 @@
+## Pull Requests - Rules
+- ONLY signed and verified commits
+- ONLY from your name
+- DO NOT commit with `codex` or `claude` as author/commiter
+- PREFER `flow` branch for development, not `main`

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "telemt"
-version = "3.0.3"
+version = "3.0.4"
 edition = "2024"
 
 [dependencies]

LICENSING.md

@@ -0,0 +1,17 @@
+# LICENSING
+## Licenses for Versions
+| Version | License       |
+|---------|---------------|
+| 1.0     | NO LICNESE    |
+| 1.1     | NO LICENSE    |
+| 1.2     | NO LICENSE    |
+| 2.0     | NO LICENSE    |
+| 3.0     | TELEMT UL 1   |
+
+### License Types
+- **NO LICENSE** = ***ALL RIGHT RESERVED***
+- **TELEMT UL1** - work in progress license for source code of `telemt`, which encourages:
+  - fair use, 
+  - contributions, 
+  - distribution, 
+  - but prohibits NOT mentioning the authors

README.md

@@ -10,74 +10,40 @@
 
 ### 🇷🇺 RU
 
-15 февраля мы опубликовали `telemt 3` с поддержкой Middle-End Proxy, а значит:
+18 февраля мы опубликовали `telemt 3.0.3`, он имеет:
 
-- с функциональными медиа, в том числе с CDN/DC=203  
+- улучшенный механизм Middle-End Health Check
-- с Ad-tag — показывайте спонсорский канал и собирайте статистику через официального бота  
+- высокоскоростное восстановление инициализации Middle-End
-- с новым подходом к безопасности и асинхронности  
+- меньше задержек на hot-path
-- с высокоточной диагностикой криптографии через `ME_DIAG`  
+- более корректную работу в Dualstack, а именно - IPv6 Middle-End
+- аккуратное переподключение клиента без дрифта сессий между Middle-End
+- автоматическая деградация на Direct-DC при массовой (>2 ME-DC-групп) недоступности Middle-End
+- автодетект IP за NAT, при возможности - будет выполнен хендшейк с ME, при неудаче - автодеградация
+- единственный известный специальный DC=203 уже добавлен в код: медиа загружаются с CDN в Direct-DC режиме
 
-Для использования нужно:
+[Здесь вы можете найти релиз](https://github.com/telemt/telemt/releases/tag/3.0.3)
 
-1. Версия `telemt` ≥3.0.0
+Если у вас есть компетенции в асинхронных сетевых приложениях, анализе трафика, реверс-инжиниринге или сетевых расследованиях - мы открыты к идеям и pull requests!
-2. Выполнение любого из наборов условий:
-   - публичный IP для исходящих соединений установлен на интерфейса инстанса с `telemt`
-     - ЛИБО
-   - вы используете NAT 1:1 + включили STUN-пробинг
-3. В конфиге, в секции `[general]` указать:
-```toml
-use_middle_proxy = true
-```
-
-Если условия из пункта 1 не выполняются:
-1. Выключите ME-режим:
-   - установите `use_middle_proxy = false`
-     - ЛИБО
-   - Middle-End Proxy будет выключен автоматически по таймауту, но это займёт больше времени при запуске
-2. В конфиге, добавьте в конец:
-```toml
-[dc_overrides]
-"203" = "91.105.192.100:443"
-```
-
-Если у вас есть компетенции в асинхронных сетевых приложениях, анализе трафика, реверс-инжиниринге или сетевых расследованиях — мы открыты к идеям и pull requests.
 
 </td>
 <td width="50%" valign="top">
 
 ### 🇬🇧 EN
 
-On February 15, we released `telemt 3` with support for Middle-End Proxy, which means:
+On February 18, we released `telemt 3.0.3`. This version introduces:
 
-- functional media, including CDN/DC=203  
+- improved Middle-End Health Check method  
-- Ad-tag support – promote a sponsored channel and collect statistics via Telegram bot  
+- high-speed recovery of Middle-End init
-- new approach to security and asynchronicity  
+- reduced latency on the hot path  
-- high-precision cryptography diagnostics via `ME_DIAG`  
+- correct Dualstack support: proper handling of IPv6 Middle-End  
+- *clean* client reconnection without session "drift" between Middle-End
+- automatic degradation to Direct-DC mode in case of large-scale (>2 ME-DC groups) Middle-End unavailability  
+- automatic public IP detection behind NAT; first - Middle-End handshake is performed, otherwise automatic degradation is applied  
+- known special DC=203 is now handled natively: media is delivered from the CDN via Direct-DC mode  
 
-To use this feature, the following requirements must be met:
+[Release is available here](https://github.com/telemt/telemt/releases/tag/3.0.3)
-1. `telemt` version ≥ 3.0.0
-2. One of the following conditions satisfied:
-   - the instance running `telemt` has a public IP address assigned to its network interface for outbound connections  
-     - OR
-   - you are using 1:1 NAT and have STUN probing enabled  
-3. In the config file, under the `[general]` section, specify:
-```toml
-use_middle_proxy = true
-````
 
-If the conditions from step 1 are not satisfied:
+If you have expertise in asynchronous network applications, traffic analysis, reverse engineering, or network forensics - we welcome ideas and pull requests!
-1. Disable Middle-End mode:
-   - set `use_middle_proxy = false`
-     - OR
-   - Middle-End Proxy will be disabled automatically after a timeout, but this will increase startup time
-
-2. In the config file, add the following at the end:
-```toml
-[dc_overrides]
-"203" = "91.105.192.100:443"
-```
-
-If you have expertise in asynchronous network applications, traffic analysis, reverse engineering, or network forensics — we welcome ideas, suggestions, and pull requests.
 
 </td>
 </tr>
@@ -88,6 +54,8 @@ If you have expertise in asynchronous network applications, traffic analysis, re
 
 ⚓ Our implementation of **TLS-fronting** is one of the most deeply debugged, focused, advanced and *almost* **"behaviorally consistent to real"**:  we are confident we have it right - [see evidence on our validation and traces](#recognizability-for-dpi-and-crawler)
 
+⚓ Our ***Middle-End Pool*** is fastest by design in standard scenarios, compared to other implementations of connecting to the Middle-End Proxy: non dramatically, but usual
+
 # GOTO
 - [Features](#features)
 - [Quick Start Guide](#quick-start-guide)

src/config/load.rs

@@ -208,6 +208,8 @@ impl ProxyConfig {
                 upstream_type: UpstreamType::Direct { interface: None },
                 weight: 1,
                 enabled: true,
+                scopes: String::new(),
+                selected_scope: String::new(),
             });
         }
 

src/config/types.rs

@@ -403,6 +403,10 @@ pub struct UpstreamConfig {
     pub weight: u16,
     #[serde(default = "default_true")]
     pub enabled: bool,
+    #[serde(default)]
+    pub scopes: String,
+    #[serde(skip)]
+    pub selected_scope: String,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]

src/proxy/direct_relay.rs

@@ -45,7 +45,7 @@ where
     );
 
     let tg_stream = upstream_manager
-        .connect(dc_addr, Some(success.dc_idx))
+        .connect(dc_addr, Some(success.dc_idx), user.strip_prefix("scope_").filter(|s| !s.is_empty()))
         .await?;
 
     debug!(peer = %success.peer, dc_addr = %dc_addr, "Connected, performing TG handshake");

src/transport/upstream.rs

@@ -167,20 +167,44 @@ impl UpstreamManager {
     }
 
     /// Select upstream using latency-weighted random selection.
-    async fn select_upstream(&self, dc_idx: Option<i16>) -> Option<usize> {
+    async fn select_upstream(&self, dc_idx: Option<i16>, scope: Option<&str>) -> Option<usize> {
         let upstreams = self.upstreams.read().await;
         if upstreams.is_empty() {
             return None;
         }
-
+        // Scope filter:
-        let healthy: Vec<usize> = upstreams.iter()
+        //   If scope is set: only scoped and matched items
+        //   If scope is not set: only unscoped items
+        let filtered_upstreams : Vec<usize> = upstreams.iter()
             .enumerate()
-            .filter(|(_, u)| u.healthy)
+            .filter(|(_, u)| {
+                scope.map_or(
+                    u.config.scopes.is_empty(),
+                    |req_scope| {
+                        u.config.scopes
+                            .split(',')
+                            .map(str::trim)
+                            .any(|s| s == req_scope)
+                    }
+                )
+            })
             .map(|(i, _)| i)
             .collect();
 
+        // Healthy filter
+        let healthy: Vec<usize> = filtered_upstreams.iter()
+            .filter(|&&i| upstreams[i].healthy)
+            .copied()
+            .collect();
+
+        if filtered_upstreams.is_empty() {
+            warn!(scope = scope, "No upstreams available! Using first (direct?)");
+            return None;
+        }
+
         if healthy.is_empty() {
-            return Some(rand::rng().gen_range(0..upstreams.len()));
+            warn!(scope = scope, "No healthy upstreams available! Using random.");
+            return Some(filtered_upstreams[rand::rng().gen_range(0..filtered_upstreams.len())]);
         }
 
         if healthy.len() == 1 {
@@ -222,15 +246,20 @@ impl UpstreamManager {
     }
 
     /// Connect to target through a selected upstream.
-    pub async fn connect(&self, target: SocketAddr, dc_idx: Option<i16>) -> Result<TcpStream> {
+    pub async fn connect(&self, target: SocketAddr, dc_idx: Option<i16>, scope: Option<&str>) -> Result<TcpStream> {
-        let idx = self.select_upstream(dc_idx).await
+        let idx = self.select_upstream(dc_idx, scope).await
             .ok_or_else(|| ProxyError::Config("No upstreams available".to_string()))?;
 
-        let upstream = {
+        let mut upstream = {
             let guard = self.upstreams.read().await;
             guard[idx].config.clone()
         };
 
+        // Set scope for configuration copy
+        if let Some(s) = scope {
+            upstream.selected_scope = s.to_string();
+        }
+
         let start = Instant::now();
 
         match self.connect_via_upstream(&upstream, target).await {
@@ -313,8 +342,12 @@ impl UpstreamManager {
                 if let Some(e) = stream.take_error()? {
                     return Err(ProxyError::Io(e));
                 }
+                // replace socks user_id with config.selected_scope, if set
+                let scope: Option<&str> = Some(config.selected_scope.as_str())
+                    .filter(|s| !s.is_empty());
+                let _user_id: Option<&str> = scope.or(user_id.as_deref());
 
-                connect_socks4(&mut stream, target, user_id.as_deref()).await?;
+                connect_socks4(&mut stream, target, _user_id).await?;
                 Ok(stream)
             },
             UpstreamType::Socks5 { address, interface, username, password } => {
@@ -341,7 +374,14 @@ impl UpstreamManager {
                     return Err(ProxyError::Io(e));
                 }
 
-                connect_socks5(&mut stream, target, username.as_deref(), password.as_deref()).await?;
+                debug!(config = ?config, "Socks5 connection");
+                // replace socks user:pass with config.selected_scope, if set
+                let scope: Option<&str> = Some(config.selected_scope.as_str())
+                    .filter(|s| !s.is_empty());
+                let _username: Option<&str> = scope.or(username.as_deref());
+                let _password: Option<&str> = scope.or(password.as_deref());
+
+                connect_socks5(&mut stream, target, _username, _password).await?;
                 Ok(stream)
             },
         }