104 lines
2.6 KiB
Markdown
104 lines
2.6 KiB
Markdown
# LookAround
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"I want to SSH into my laptop, but I keep forgetting its IP!!"
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_Has this ever happened to you?_
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```text
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$ ping $(lookaround find-nick laptop)
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PING 192.168.1.101 (192.168.1.101) 56(84) bytes of data.
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...
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$ lookaround client
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Found 3 peers:
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11:11:11:11:11:11 = 192.168.1.101 `laptop`
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22:22:22:22:22:22 = 192.168.1.102 `desktop`
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33:33:33:33:33:33 = 192.168.1.103 `old-laptop`
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```
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LookAround is a Rust program for looking up your computers' MAC and IP addresses
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within a LAN. There's no central server, so it's not a look-up, it's a look-around.
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The client uses IP multicast to find servers within the
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same multicast domain, similar to Avahi and Bonjour.
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Systems self-identify by MAC address and nicknames. Public keys with
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TOFU semantics are intended before v1.0.0.
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## Installation
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Use the Cargo package manager from [Rust](https://rustup.rs/) to install LookAround.
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```bash
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cargo install lookaround
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```
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To auto-start the server as a normal user.
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put this systemd unit in `~/.config/systemd/user/lookaround.service`:
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```ini
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[Unit]
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Description=LookAround
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[Service]
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ExecStart=/home/user/.cargo/bin/lookaround server --nickname my-desktop
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[Install]
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WantedBy=default.target
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```
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Then start the service, check that it's running okay, and enable it for
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auto-start:
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```bash
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systemctl --user start lookaround
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systemctl --user status lookaround
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systemctl --user enable lookaround
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```
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## Usage
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Run the server manually: (If you didn't configure auto-start)
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```bash
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lookaround server --nickname my-desktop
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```
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On a client computer:
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```bash
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# Use the `find-nick` subcommnad to find an IP...
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lookaround find-nick laptop
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# Prints `192.168.1.101`
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# Or ping it...
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ping $(lookaround find-nick laptop)
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# Or SSH to it...
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ssh user@$(lookaround find-nick laptop)
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# Or pull a file from it
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# (after starting `nc -l -p 9000 < some-file` on the laptop)
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nc $(lookaround find-nick laptop) 9000
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# Use the `client` subcommand to find all servers in the same multicast domain
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lookaround client
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# Use a longer timeout if servers need more than 500 ms to respond
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lookaround client --timeout-ms 1000
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```
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## Contributing
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Pull requests are welcome. This is a hobby project, so I may reject
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contributions that are too big to review.
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Use the [kazupon Git commit message convention](https://github.com/kazupon/git-commit-message-convention)
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## License
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[AGPL-3.0](https://www.gnu.org/licenses/agpl-3.0.html)
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## This Git repo
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This repo's upstream is https://six-five-six-four.com/git/reactor/lookaround.
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It's mirrored on my GitHub, https://github.com/ReactorScram/lookaround
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I don't use GitHub issues, so issues are in issues.md in the repo.
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