Server packet parse error

[killcerr]

127.0.0.1/50186 Deserialization failure for packet 0x7a. Packet buffer saved in ./1760188917254_packetReadError.txt as buffer was too large (323296 bytes).
127.0.0.1/50186 PartialReadError: Read error for undefined : undefined

[extremeheat]

Are you going to provide the relevant buffer?

[killcerr]

Are you going to provide the relevant buffer?

1760188917254_packetReadError.txt
@extremeheat

[ahmed512s]

@extremeheat
I am chiming in to report that I am experiencing this exact same issue (Packet 0x7a, PartialReadError, BiomeChunkGeneration) on version 1.21.111 when using the Relay.The original reporter (killcerr) provided the buffer data as requested 3 weeks ago. Is there any update on this?

[ahmed512s]

Hi @extremeheat,

Following up on this issue, I believe I've found the specific protocol update we were all waiting for.

It looks like Mojang merged the official documentation for the latest version (NetworkProtocolVersion 859) a few days ago in their bedrock-protocol-docs repository.

This is the exact pull request:
Mojang/bedrock-protocol-docs#23
(Merge pull request #23 from Mojang/r/21_U12Protocol)

Does this PR provide the necessary schema changes to patch the parser for packet 0x7a (BiomeChunkGeneration)?

This seems to be the exact information needed to fix the PartialReadError and get the Relay feature working again.

We're really looking forward to a patch now that the official data is available. Thanks!

[killcerr]

Hi @extremeheat,

Following up on this issue, I believe I've found the specific protocol update we were all waiting for.

It looks like Mojang merged the official documentation for the latest version (NetworkProtocolVersion 859) a few days ago in their bedrock-protocol-docs repository.

This is the exact pull request:
Mojang/bedrock-protocol-docs#23
(Merge pull request #23 from Mojang/r/21_U12Protocol)

Does this PR provide the necessary schema changes to patch the parser for packet 0x7a (BiomeChunkGeneration)?

This seems to be the exact information needed to fix the PartialReadError and get the Relay feature working again.

We're really looking forward to a patch now that the official data is available. Thanks!

I think there are relevant discussions in discord, maybe you can take a look.

[extremeheat]

Open for PR

[killcerr]

I wonder if it's possible to forward a packet without parsing it.

[extremeheat]

Why not open PR to fix the bug?

[killcerr]

Why not open PR to fix the bug?

I might test my hypothesis over the weekend. There seem to be some errors in the packet structure.

[Poko-Cmnt]

Ah yes same kind of issue when connecting to relay.

New connection from 127.0.0.1/37855
New connection 127.0.0.1/37855
Connecting to 127.0.0.1 19132
Connected to upstream server
127.0.0.1/37855 Deserialization failure for packet 0x7a. Packet buffer saved in ./1763018421370_packetReadError.txt as buffer was too large (323383 bytes).
127.0.0.1/37855 PartialReadError: Read error for undefined : varint is too big: 70
    at new ExtendableError (home/pjs/node_modules/protodef/src/utils.js:63:13)
    at new PartialReadError (home/pjs/node_modules/protodef/src/utils.js:70:5)
    at readVarInt (home/pjs/node_modules/protodef/src/datatypes/varint.js:27:27)
    at Object.readSignedVarInt [as zigzag32] (home/pjs/node_modules/protodef/src/datatypes/varint.js:113:27)
    at eval (eval at compile (home/pjs/node_modules/protodef/src/compiler.js:262:12), <anonymous>:2354:47)
    at Object.BiomeCoordinate (eval at compile (home/pjs/node_modules/protodef/src/compiler.js:262:12), <anonymous>:2356:9)
    at eval (eval at compile (home/pjs/node_modules/protodef/src/compiler.js:262:12), <anonymous>:2328:45)
    at Object.BiomeScatterParameter (eval at compile (home/pjs/node_modules/protodef/src/compiler.js:262:12), <anonymous>:2333:9)
    at Object.BiomeConsolidatedFeature (eval at compile (home/pjs/node_modules/protodef/src/compiler.js:262:12), <anonymous>:2314:78)
    at eval (eval at compile (home/pjs/node_modules/protodef/src/compiler.js:262:12), <anonymous>:2084:56) {
  partialReadError: true
}
Kicked  127.0.0.1/37855 Server packet parse error
Kicked  127.0.0.1/37855 Backend server closed connection
player disconnected 127.0.0.1/37855 undefined
Connection closed:  127.0.0.1/37855 undefined