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feat: protocol 767 (1.21) packet handling and AttributeSubComponent update

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- Add AttributeSubComponent121 that uses ResourceLocation(string) instead
  of UUID+Name, matching the 1.21 attribute modifier wire format change.
  Register it in SubComponentRegistry121 via new ReplaceSubComponent method.
- Add ProjectilePower packet handler: reads 1 double (accelerationPower)
  for 1.21+, or 3 doubles (xPower/yPower/zPower) for 1.20.6.
- Add CustomReportDetails and ServerLinks packet handlers in both Play
  and Configuration phases, consuming all fields to prevent byte offset
  errors on 1.21 servers.

Made-with: Cursor
This commit is contained in:
BruceChen 2026-03-20 01:22:25 +08:00
parent 2fb09342a3
commit c23c229eb2
4 changed files with 104 additions and 1 deletions
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61
MinecraftClient/Protocol/Handlers/Protocol18.cs
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@ -191,6 +191,7 @@ namespace MinecraftClient.Protocol.Handlers
// Item palette
> MC_1_21_Version when handler.GetInventoryEnabled() =>
throw new NotImplementedException(Translations.exception_palette_item),
>= MC_1_21_Version => new ItemPalette121(),
>= MC_1_20_6_Version => new ItemPalette1206(),
>= MC_1_20_4_Version => new ItemPalette1204(),
>= MC_1_20_Version => new ItemPalette120(),
@ -550,6 +551,28 @@ namespace MinecraftClient.Protocol.Handlers
SendKnownDataPacks(vanillaPacks);
break;
case ConfigurationPacketTypesIn.CustomReportDetails:
var cfgDetailsCount = dataTypes.ReadNextVarInt(packetData);
for (var i = 0; i < cfgDetailsCount; i++)
{
dataTypes.ReadNextString(packetData); // Title
dataTypes.ReadNextString(packetData); // Description
}
break;
case ConfigurationPacketTypesIn.ServerLinks:
var cfgLinksCount = dataTypes.ReadNextVarInt(packetData);
for (var i = 0; i < cfgLinksCount; i++)
{
var cfgIsBuiltIn = dataTypes.ReadNextBool(packetData);
if (cfgIsBuiltIn)
dataTypes.ReadNextVarInt(packetData); // Known type ID
else
dataTypes.ReadNextChat(packetData); // Component label
dataTypes.ReadNextString(packetData); // URL
}
break;
// Ignore other packets at this stage
default:
return true;
@ -2827,7 +2850,43 @@ namespace MinecraftClient.Protocol.Handlers
McClient.Instance?.Transfer(host, port);
break;
case PacketTypesIn.ProjectilePower:
dataTypes.ReadNextVarInt(packetData); // Entity ID
if (protocolVersion >= MC_1_21_Version)
{
dataTypes.ReadNextDouble(packetData); // Acceleration Power
}
else
{
dataTypes.ReadNextDouble(packetData); // X Power
dataTypes.ReadNextDouble(packetData); // Y Power
dataTypes.ReadNextDouble(packetData); // Z Power
}
break;
case PacketTypesIn.CustomReportDetails:
var detailsCount = dataTypes.ReadNextVarInt(packetData);
for (var i = 0; i < detailsCount; i++)
{
dataTypes.ReadNextString(packetData); // Title
dataTypes.ReadNextString(packetData); // Description
}
break;
case PacketTypesIn.ServerLinks:
var linksCount = dataTypes.ReadNextVarInt(packetData);
for (var i = 0; i < linksCount; i++)
{
var isBuiltIn = dataTypes.ReadNextBool(packetData);
if (isBuiltIn)
dataTypes.ReadNextVarInt(packetData); // Known type ID
else
dataTypes.ReadNextChat(packetData); // Component label
dataTypes.ReadNextString(packetData); // URL
}
break;
default:
return false; //Ignored packet
}