50 lines
1023 B
Go
50 lines
1023 B
Go
package dht
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import (
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"bytes"
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"encoding/binary"
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"errors"
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"fmt"
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"github.com/anacrolix/torrent/bencode"
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)
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type CompactIPv4NodeInfo []NodeInfo
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var _ bencode.Unmarshaler = &CompactIPv4NodeInfo{}
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func (me *CompactIPv4NodeInfo) UnmarshalBencode(_b []byte) (err error) {
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var b []byte
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err = bencode.Unmarshal(_b, &b)
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if err != nil {
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return
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}
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if len(b)%CompactIPv4NodeInfoLen != 0 {
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err = fmt.Errorf("bad length: %d", len(b))
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return
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}
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for i := 0; i < len(b); i += CompactIPv4NodeInfoLen {
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var ni NodeInfo
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err = ni.UnmarshalCompactIPv4(b[i : i+CompactIPv4NodeInfoLen])
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if err != nil {
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return
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}
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*me = append(*me, ni)
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}
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return
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}
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func (me CompactIPv4NodeInfo) MarshalBencode() (ret []byte, err error) {
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var buf bytes.Buffer
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for _, ni := range me {
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buf.Write(ni.ID[:])
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if ni.Addr == nil {
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err = errors.New("nil addr in node info")
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return
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}
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buf.Write(ni.Addr.IP().To4())
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binary.Write(&buf, binary.BigEndian, uint16(ni.Addr.UDPAddr().Port))
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}
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return bencode.Marshal(buf.Bytes())
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}
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