mirror of
https://github.com/m1ngsama/TNT.git
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m1ngsama
da8b77d625
- Move all documentation to docs/ directory for better organization - Rewrite README.md following Linux kernel style (English only) - Rename HACKING -> CONTRIBUTING.md - Rename QUICKREF -> QUICKREF.md - Rename README -> README.old - Add comprehensive Development-Guide.md for contributors Documentation structure: - README.md: Project overview and quick start - docs/Development-Guide.md: Complete developer manual - docs/CONTRIBUTING.md: Contribution guidelines - docs/DEPLOYMENT.md: Production deployment guide - docs/SECURITY_QUICKREF.md: Security config reference - docs/QUICKREF.md: Command cheat sheet This aligns with Linux kernel documentation practices: simple, organized, and accessible.
277 lines
6.2 KiB
Markdown
277 lines
6.2 KiB
Markdown
# TNT - Terminal Network Talk
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A minimalist terminal chat server with Vim-style interface over SSH.
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## Features
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- **Zero config** - Download and run, auto-generates SSH keys
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- **SSH-based** - Leverage mature SSH protocol for encryption and auth
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- **Vim-style UI** - Modal editing (INSERT/NORMAL/COMMAND)
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- **UTF-8 native** - Full Unicode support
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- **High performance** - Pure C, multi-threaded, sub-100ms startup
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- **Secure** - Rate limiting, auth failure protection, input validation
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- **Persistent** - Auto-saves chat history
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- **Elegant** - Flicker-free TUI rendering
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## Quick Start
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### Installation
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**One-liner:**
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```sh
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curl -sSL https://raw.githubusercontent.com/m1ngsama/TNT/main/install.sh | sh
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```
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**From source:**
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```sh
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git clone https://github.com/m1ngsama/TNT.git
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cd TNT
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make
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sudo make install
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```
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**Binary releases:**
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https://github.com/m1ngsama/TNT/releases
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### Running
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```sh
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tnt # default port 2222
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tnt -p 3333 # custom port
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PORT=3333 tnt # via env var
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```
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### Connecting
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```sh
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ssh -p 2222 localhost
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```
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**Anonymous access by default**: Users can connect with ANY username/password (or empty password). No SSH keys required. Perfect for public chat servers.
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## Usage
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### Keybindings
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**INSERT mode (default)**
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```
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ESC - Enter NORMAL mode
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Enter - Send message
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Backspace - Delete character
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Ctrl+W - Delete last word
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Ctrl+U - Delete line
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Ctrl+C - Enter NORMAL mode
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```
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**NORMAL mode**
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```
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i - Return to INSERT mode
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: - Enter COMMAND mode
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j/k - Scroll down/up
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g/G - Scroll to top/bottom
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? - Show help
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```
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**COMMAND mode**
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```
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:list, :users, :who - Show online users
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:help, :commands - Show available commands
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:clear, :cls - Clear command output
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ESC - Return to NORMAL mode
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```
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### Security Configuration
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**Access control:**
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```sh
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# Require password
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TNT_ACCESS_TOKEN="secret" tnt
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# Bind to localhost only
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TNT_BIND_ADDR=127.0.0.1 tnt
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# Bind to specific IP
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TNT_BIND_ADDR=192.168.1.100 tnt
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```
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**Rate limiting:**
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```sh
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# Max total connections (default 64)
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TNT_MAX_CONNECTIONS=100 tnt
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# Max connections per IP (default 5)
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TNT_MAX_CONN_PER_IP=10 tnt
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# Disable rate limiting (testing only)
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TNT_RATE_LIMIT=0 tnt
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```
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**SSH logging:**
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```sh
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# 0=none, 1=warning, 2=protocol, 3=packet, 4=functions (default 1)
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TNT_SSH_LOG_LEVEL=3 tnt
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```
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**Production example:**
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```sh
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TNT_ACCESS_TOKEN="strong-password-123" \
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TNT_BIND_ADDR=0.0.0.0 \
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TNT_MAX_CONNECTIONS=200 \
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TNT_MAX_CONN_PER_IP=3 \
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TNT_SSH_LOG_LEVEL=1 \
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tnt -p 2222
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```
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## Development
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### Building
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```sh
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make # standard build
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make debug # debug build (with symbols)
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make asan # AddressSanitizer build
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make check # static analysis (cppcheck)
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make clean # clean build artifacts
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```
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### Testing
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```sh
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make test # run comprehensive test suite
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# Individual tests
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cd tests
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./test_basic.sh # basic functionality
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./test_security_features.sh # security features
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./test_anonymous_access.sh # anonymous access
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./test_stress.sh # stress test
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```
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**Test coverage:**
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- Basic functionality: 3 tests
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- Anonymous access: 2 tests
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- Security features: 11 tests
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- Stress test: concurrent connections
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### Dependencies
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- **libssh** (>= 0.9.0) - SSH protocol library
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- **pthread** - POSIX threads
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- **gcc/clang** - C11 compiler
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**Ubuntu/Debian:**
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```sh
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sudo apt-get install libssh-dev
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```
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**macOS:**
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```sh
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brew install libssh
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```
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**Fedora/RHEL:**
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```sh
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sudo dnf install libssh-devel
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```
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## Project Structure
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```
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TNT/
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├── src/ # source code
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│ ├── main.c # entry point
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│ ├── ssh_server.c # SSH server implementation
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│ ├── chat_room.c # chat room logic
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│ ├── message.c # message persistence
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│ ├── tui.c # terminal UI rendering
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│ └── utf8.c # UTF-8 character handling
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├── include/ # header files
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├── tests/ # test scripts
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├── docs/ # documentation
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├── scripts/ # operational scripts
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├── Makefile # build configuration
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└── README.md # this file
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```
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## Deployment
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### systemd Service
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```sh
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sudo cp tnt.service /etc/systemd/system/
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sudo systemctl daemon-reload
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sudo systemctl enable tnt
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sudo systemctl start tnt
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```
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### Docker
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```dockerfile
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FROM alpine:latest
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RUN apk add --no-cache libssh
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COPY tnt /usr/local/bin/
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EXPOSE 2222
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CMD ["tnt"]
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```
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See [docs/DEPLOYMENT.md](docs/DEPLOYMENT.md) for details.
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## Files
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```
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messages.log - Chat history (RFC3339 format)
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host_key - SSH host key (auto-generated, 4096-bit RSA)
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tnt.service - systemd service unit
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```
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## Documentation
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- [Development Guide](https://github.com/m1ngsama/TNT/wiki/Development-Guide) - Complete development manual
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- [Quick Setup](docs/EASY_SETUP.md) - 5-minute deployment guide
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- [Security Reference](docs/SECURITY_QUICKREF.md) - Security config quick reference
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- [Contributing](docs/CONTRIBUTING.md) - How to contribute
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- [Changelog](docs/CHANGELOG.md) - Version history
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- [CI/CD](docs/CICD.md) - Continuous integration setup
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- [Quick Reference](docs/QUICKREF.md) - Command cheat sheet
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## Performance
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- **Startup**: < 100ms (even with 100k+ message history)
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- **Memory**: ~2MB (idle)
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- **Concurrency**: Supports 100+ concurrent connections
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- **Throughput**: 1000+ messages/second
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## Known Limitations
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- Single chat room (no multi-room support yet)
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- Keeps only last 100 messages in memory
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- Ctrl+W only recognizes ASCII space as word boundary
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## Contributing
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Contributions welcome! See [CONTRIBUTING.md](docs/CONTRIBUTING.md)
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**Process:**
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1. Fork the repository
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2. Create feature branch (`git checkout -b feature/AmazingFeature`)
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3. Commit changes (`git commit -m 'Add some AmazingFeature'`)
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4. Push to branch (`git push origin feature/AmazingFeature`)
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5. Open Pull Request
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## License
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MIT License - see [LICENSE](LICENSE)
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## Acknowledgments
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- [libssh](https://www.libssh.org/) - SSH protocol implementation
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- Linux kernel community - Code style and engineering practices
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## Contact
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- Issues: https://github.com/m1ngsama/TNT/issues
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- Pull Requests: https://github.com/m1ngsama/TNT/pulls
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---
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**"Talk is cheap. Show me the code."** - Linus Torvalds
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