92 lines
1.7 KiB
Go
92 lines
1.7 KiB
Go
package main
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import (
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"bytes"
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"compress/zlib"
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"encoding/binary"
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"io"
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)
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const NodeCount = 16 * 16 * 16
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func processBlockdata(c *Conn, r *bytes.Reader) ([]byte, bool) {
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srv := c.ServerName()
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posData := make([]byte, 6)
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r.Read(posData)
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x := int16(binary.BigEndian.Uint16(posData[0:2]))
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y := int16(binary.BigEndian.Uint16(posData[2:4]))
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z := int16(binary.BigEndian.Uint16(posData[4:6]))
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c.blocks = append(c.blocks, [3]int16{x, y, z})
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r.Seek(13, io.SeekStart)
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zr, err := zlib.NewReader(r)
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if err != nil {
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return nil, true
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}
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buf := &bytes.Buffer{}
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_, err = io.Copy(buf, zr)
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if err != nil {
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return nil, true
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}
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zr.Close()
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nodes := buf.Bytes()
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for i := uint32(0); i < NodeCount; i++ {
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contentID := binary.BigEndian.Uint16(nodes[2*i : 2+2*i])
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if contentID >= ContentUnknown && contentID <= ContentIgnore {
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continue
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}
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newID := NodeDefs()[srv][contentID].ID()
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binary.BigEndian.PutUint16(nodes[2*i:2+2*i], newID)
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}
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var recompBuf bytes.Buffer
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zw := zlib.NewWriter(&recompBuf)
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zw.Write(nodes)
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zw.Close()
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recompNodes := recompBuf.Bytes()
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meta := make([]byte, r.Len())
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r.Read(meta)
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r.Seek(2, io.SeekStart)
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blockMeta := make([]byte, 11)
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r.Read(blockMeta)
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data := make([]byte, 11+len(recompNodes)+len(meta))
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copy(data[:11], blockMeta)
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copy(data[11:11+len(recompNodes)], recompNodes)
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copy(data[11+len(recompNodes):], meta)
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return data, false
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}
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func processAddnode(c *Conn, r *bytes.Reader) []byte {
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srv := c.ServerName()
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r.Seek(8, io.SeekStart)
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idBytes := make([]byte, 2)
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r.Read(idBytes)
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contentID := binary.BigEndian.Uint16(idBytes)
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newID := NodeDefs()[srv][contentID].ID()
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r.Seek(2, io.SeekStart)
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data := make([]byte, r.Len())
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r.Read(data)
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binary.BigEndian.PutUint16(data[6:8], newID)
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return data
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}
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