Changelog

All official release notes are published on the GitHub Releases page.

v1.3.0 2026-10-09

• Custom reply rules: the old fixed "auto-reply" is now a rule engine — each rule is a match condition plus a reply action, matching incoming frames and answering automatically
  • Match conditions: arbitrary nesting of "all of / any of / not", plus a range of atomic predicates — contains bytes, fixed exact, fixed masked, prefix + length range (with optional positional constraints), frame length range, byte at offset, integer at offset, suffix, regex, source address (CIDR allowed), field value, and checksum validation
  • Reply action: content may use received-frame variables ${rx.*} and general variables; each rule can set its own encoding (Raw / append LF / append CRLF / inherit from the connection) — pick "Raw" for binary protocols so no line ending is appended and the checksum stays valid
  • Scoped per connection: a rule only applies to its own connection, and the connection page's "Auto Reply" switch is that connection's single master gate; supports enable/disable, duplicate, drag-to-reorder (top to bottom, first hit wins), trigger counts and reset
  • Inline test run: enter a test frame in the editor to immediately see whether it hits, the first unmet condition, the rendered reply, and the received-frame variables it uses
  • Legacy fixed auto-reply content can be migrated into an equivalent rule in one click
• Message variables: the send box, timed tasks and reply rules all support variables — beyond the existing ${seq} / ${timestamp} / ${uuid} / ${random:min:max}, new received-frame variables ${rx.*} (raw / hex / ascii / base64 and integer accessors such as u8 / u16be / i32le), checksums generated at send time (${crc16modbus:off:len} and others), and ${= expression }; in Hex mode numeric variables are converted to hexadecimal automatically
• Send tasks (line-by-line): import a file or paste multiple lines to send them one per line, with a per-line interval, looping and a maximum round count; the task panel shows live progress and supports pause / resume / stop / delete
• Timed tasks (heartbeat): each connection supports one timed task that loops a single message at a fixed interval, optionally auto-starting with the connection; visible in the task panel, with an interval you can edit and apply immediately
• Trailing character (LF / CRLF): a new "Suffix" selector in the send area (None / LF / CRLF) applies to every outgoing message, and also to line-send tasks and auto reply; the stress test config has its own "Trailer" option (Inherit / None / LF / CRLF) appended to each packet on send, where "Inherit" follows the message panel's suffix setting
• Hex input context menu: added cut / copy / paste / select all, plus checksum tools that compute XOR, Sum8, Modbus LRC, CRC16-Modbus, CRC16-CCITT-FALSE and CRC32 directly on the input
• Linux deb package: new deb packaging for x86_64 and ARM64 — Debian/Ubuntu and derivatives can install with sudo apt install ./netassistant-*.deb, which resolves dependencies automatically

Fixes and improvements:

• Dependencies migrated to gpui-kit

v1.2.0 2026-09-23

• Keyboard shortcuts: new application-level shortcuts — Ctrl+Enter to send, Ctrl+Tab / Ctrl+Shift+Tab and Ctrl+PageDown/PageUp to cycle tabs, Ctrl+1..9 to jump to a tab, Ctrl+W to close a tab, Ctrl+N for a new connection, Ctrl+K to focus the message input, Ctrl+F for message search; they work whether the focus is in an input or on empty space
• Message search: open a non-modal search overlay from the toolbar magnifier or Ctrl+F, with a live i/n match counter; jump ring-wise with Enter / Shift+Enter or the up/down buttons, with the matching row highlighted and scrolled into view; Esc closes it, and jumping turns auto-scroll off to keep the position stable
• ASCII ↔ Hex conversion: switching between text and hex mode converts the content as UTF-8; the context menu's "Convert to Hex / Convert to Text" shows the result in a read-only window with a copy button without rewriting the input; non-printable bytes are escaped as \n \r \t \\ and \xNN, so Hex → Text → Hex round-trips byte-for-byte; hex output is consistently uppercase
• File data source: the toolbar's "Open File" button reads a local file into the send box, with UTF-8 / GBK / ANSI encoding selection and content preview, human-readable file size, and a 1 MiB limit; hex mode imports raw bytes, and oversized content falls back to text editing
• Message count cap (keep last N): a new count input next to auto-scroll (default 10000, 0 = unlimited) drops the oldest messages once exceeded to bound memory usage; it is linked to auto-scroll — turning auto-scroll off sets it to 0 and stops dropping, and turning it back on restores the previous value. With dropping disabled (0 or auto-scroll off) messages keep accumulating, so memory grows under heavy or long-running traffic; clearing the messages or lowering the cap discards the excess immediately and brings memory down

Fixes and improvements:

• Network resources and subscriptions are now cleaned up when a tab is closed, avoiding leaks
• Fixed the caret being reset and a stray newline left behind after sending with Ctrl+Enter in the multi-line input
• Tabs are now ordered by open time; dependency upgrades (reqwest 0.13 and others, TLS root certificates now come from the system store)

v1.1.2 2026-09-17

• Windows installer: new official Inno Setup installer (netassistant-windows-x86_64-setup.exe) that creates Start Menu and desktop shortcuts automatically, and supports winget install & auto-upgrade
• Stress-test performance: separated network events from UI events and process them in batches, keeping the server message list in sync during heavy floods while lowering memory usage and UI stutter
• TCP/UDP path optimization: reworked send/receive and decode flow for improved throughput and stability

v1.1.1 2026-09-13

• Client local address/port binding: specify the local IP and local port under "More Settings" when creating/editing a connection, for multi-NIC setups or peers filtering by source address; the effective local endpoint is shown in the info panel once connected
• TCP listen refactor: reworked the TCP listen implementation and fixed TCP message receiving issues
• Performance improvements: batched log flushing, lazy message display recompute, faster stress latency histogram and HEX editor
• Fixed UDP socket leak on stop and port bind error reporting

v1.1.0 2026-08-31

• Multilingual interface (i18n): multi-language support built on rust-i18n, with full internationalization of UI texts, dialogs and panels
• HEX editor: new hex editor with dual hex/text views for editing payloads
• Stress panel: scrollable panel and improved dialog interactions

v1.0.1 2026-08-25

• Variable templates in stress configs: insert dynamic variables into message payloads
• Fixed a stress test UI lag issue
• Linux AppImage build: fixed AppRun / GTK dependency issues, AppImage distribution for Linux

v1.0.0 2026-08-13

First stable release. Core capabilities:

• TCP/UDP client & server with IPv4/IPv6 dual stack
• Four TCP decoders (raw / line-delimited / length-prefix / JSON) solving sticky packet issues
• Chat-style message log with favorites, remarks and keyword search
• Message export (TXT/JSON/CSV) and real-time logging
• Auto-reply and periodic send
• Smart UDP broadcast reply display for IoT device discovery debugging
• Built-in TCP/UDP high-concurrency stress engine (QPS, latency percentiles, failure breakdown, CSV reports)
• Dark mode, multi-tab, multilingual interface
• HEX editor

Highlights within this release:

• TCP/UDP stress testing: new stress engine, config dialog and stress panel
• TCP decoder and JSON decoder optimizations
• Optimized message list rendering with lower memory usage
• Fixed issues such as abnormal app exit

v0.9.1 2026-08-07

• Overall UI polish: theme color adjustments and log level changes

v0.9.0 2026-08-02

• Connection editing: edit existing saved connection configs
• JSON formatting: JSON pretty display for message content
• Monospace font for the message area, easier to read
• Upgraded the GPUI framework version

v0.8.0 2026-07-22

• Unexpected source highlighting: when the UDP server receives replies, unexpected source addresses are highlighted to spot abnormal senders
• Manual client addition: manually add client addresses in UDP server mode

v0.7.1 2026-07-21

• Fixed the UDP client source address filtering issue so broadcast replies are received correctly

v0.7.0 2026-07-15

• Message export: export message history (TXT/JSON/CSV) with real-time logging to file

v0.6.1 2026-06-05

• Fixed window dragging on GNOME (switched to the TitleBar component)

v0.6.0 2026-05-20

• Message favorites: favorite frequently used messages with remarks for quick reuse

v0.5.1 2026-05-11

• Fixed connections not being closed properly on disconnect

v0.5.0 2026-03-15

• Message list rewrite: rebuilt the message list and scrollbar on GPUI List for smoother long-list scrolling
• Ubuntu 22 build support

v0.4.5 2026-03-10

• IPv6 support: TCP/UDP connections now support IPv6
• Server message sending: TCP/UDP servers can proactively send messages to clients
• Auto-scroll option: the message list auto-scroll is now configurable
• Current version shown in the UI

v0.4.4 2026-03-01

• Fixed message sending issues and improved adaptive UI layout
• Switched to smol::channel to avoid UI lag under heavy message load

v0.4.3 2026-02-16

• Enhanced TCP decoder system: new decoder selection dialog with multiple decoding options
• Fixed real-time message refresh and theme issues

v0.4.2 2026-02-12

• Copy / clear messages: copy a single message or clear the whole list at once
• Hex auto-reply: auto-reply now supports hex content
• Added a scrollbar to the message list; refactored connection networking UI and message sender
• Theme and color updates

v0.4.1 2026-01-31

• Fixed TCP receiver splitting a single message into multiple messages
• Fixed dark mode issues; release workflow now includes commit logs

v0.4.0 2026-01-27

• Dark mode: light/dark theme switching
• Fixed the macOS build

v0.3.0 2026-01-20

• Fixed connection/tab mismatch by introducing connection IDs; multi-line tabs supported

v0.2.0 2026-01-20

• Fixed connections not being closed when closing a tab

v0.1.0 2026-01-20

• First public release: TCP/UDP client & server, multi-tab, persistent connection configs, auto-reply

Roadmap

• [x] Multilingual interface (v1.1.0)
• [x] File data source (v1.2.0)
• [ ] SSE debugging
• [ ] More data format codecs
• [ ] WebSocket protocol