neo-go/pkg/network/payload/addr.go
2018-01-29 19:17:49 +01:00

90 lines
2.1 KiB
Go

package payload
import (
"encoding/binary"
"io"
"github.com/anthdm/neo-go/pkg/util"
)
// AddrWithTime payload
type AddrWithTime struct {
// Timestamp the node connected to the network.
Timestamp uint32
Services uint64
Addr util.Endpoint
}
// NewAddrWithTime return a pointer to AddrWithTime.
func NewAddrWithTime(addr util.Endpoint) *AddrWithTime {
return &AddrWithTime{
Timestamp: 1337,
Services: 1,
Addr: addr,
}
}
// Size implements the payload interface.
func (p *AddrWithTime) Size() uint32 {
return 30
}
// DecodeBinary implements the Payload interface.
func (p *AddrWithTime) DecodeBinary(r io.Reader) error {
err := binary.Read(r, binary.LittleEndian, &p.Timestamp)
err = binary.Read(r, binary.LittleEndian, &p.Services)
err = binary.Read(r, binary.BigEndian, &p.Addr.IP)
err = binary.Read(r, binary.BigEndian, &p.Addr.Port)
return err
}
// EncodeBinary implements the Payload interface.
func (p *AddrWithTime) EncodeBinary(w io.Writer) error {
err := binary.Write(w, binary.LittleEndian, p.Timestamp)
err = binary.Write(w, binary.LittleEndian, p.Services)
err = binary.Write(w, binary.BigEndian, p.Addr.IP)
err = binary.Write(w, binary.BigEndian, p.Addr.Port)
return err
}
// AddressList holds a slice of AddrWithTime.
type AddressList struct {
Addrs []*AddrWithTime
}
// DecodeBinary implements the Payload interface.
func (p *AddressList) DecodeBinary(r io.Reader) error {
var lenList uint8
binary.Read(r, binary.LittleEndian, &lenList)
for i := 0; i < int(4); i++ {
address := &AddrWithTime{}
if err := address.DecodeBinary(r); err != nil {
return err
}
p.Addrs = append(p.Addrs, address)
}
return nil
}
// EncodeBinary implements the Payload interface.
func (p *AddressList) EncodeBinary(w io.Writer) error {
// Write the length of the slice
binary.Write(w, binary.LittleEndian, uint8(len(p.Addrs)))
for _, addr := range p.Addrs {
if err := addr.EncodeBinary(w); err != nil {
return err
}
}
return nil
}
// Size implements the Payloader interface.
func (p *AddressList) Size() uint32 {
return uint32(len(p.Addrs) * 30)
}