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https://github.com/italicsjenga/valence.git
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0a75f103aa
* Add `PacketName` * Fix inefficiency in codec.rs * Add regex argument to packet_inspector * Reorder imports * Make the regex arg optional * Update README
79 lines
2 KiB
Markdown
79 lines
2 KiB
Markdown
# What's This?
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The packet inspector is a very simple Minecraft proxy for viewing the contents of packets as they are sent/received.
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It uses Valence's protocol facilities to print packet contents.
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This was made for three purposes:
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- Check that packets between Valence and client are matching your expectations.
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- Check that packets between vanilla server and client are parsed correctly by Valence.
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- Understand how the protocol works between the vanilla server and client.
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# Usage
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First, start a server
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```sh
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cargo r -r --example conway
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```
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In a separate terminal, start the packet inspector.
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```sh
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cargo r -r -p packet_inspector -- 127.0.0.1:25566 127.0.0.1:25565
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```
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The client must connect to `localhost:25566`. You should see the packets in `stdout`.
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The third argument to the packet inspector is an optional regular expression compatible with
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the [regex](https://docs.rs/regex/latest/regex/) crate. Packets with names that match the regex are printed while those
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that don't are ignored. If the regex is not provided then the empty string is assumed and all packets are considered
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matching.
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If you're only interested in packets `Foo`, `Bar`, and `Baz`, you can use a regex such as `^(Foo|Bar|Baz)$`.
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```sh
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cargo r -r -p packet_inspector -- 127.0.0.1:25566 127.0.0.1:25565 '^(Foo|Bar|Baz)$'
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```
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Packets are printed to `stdout` while errors are printed to `stderr`. If you only want to see errors in your terminal,
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direct `stdout` elsewhere.
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```sh
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cargo r -r -p packet_inspector -- 127.0.0.1:25566 127.0.0.1:25565 > log.txt
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```
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## Quick start with Vanilla Server via Docker
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Start the server
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```sh
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docker run -e EULA=TRUE -e ONLINE_MODE=false -d -p 25565:25565 --name mc itzg/minecraft-server
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```
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View server logs
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```sh
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docker logs -f mc
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```
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Server Rcon
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```sh
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docker exec -i mc rcon-cli
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```
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In a separate terminal, start the packet inspector.
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```sh
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cargo r -r -p packet_inspector -- 127.0.0.1:25566 127.0.0.1:25565
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```
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Open Minecraft and connect to `localhost:25566`.
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Clean up
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```
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docker stop mc
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docker rm mc
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```
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