a41f938cec
As we have seen, dependencies version can prevent the build. We should user lock versions on dependencies that we know work: * Packages are vendored * Add Godep support * Added addtional install step in readme * Fix travis build error
46 lignes
997 o
Go
46 lignes
997 o
Go
package krpc
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
"net"
|
|
|
|
"github.com/anacrolix/missinggo"
|
|
)
|
|
|
|
// The size in bytes of a NodeInfo in its compact binary representation.
|
|
const CompactIPv4NodeInfoLen = 26
|
|
|
|
type NodeInfo struct {
|
|
ID [20]byte
|
|
Addr *net.UDPAddr
|
|
}
|
|
|
|
// Writes the node info to its compact binary representation in b. See
|
|
// CompactNodeInfoLen.
|
|
func (ni *NodeInfo) PutCompact(b []byte) error {
|
|
if n := copy(b[:], ni.ID[:]); n != 20 {
|
|
panic(n)
|
|
}
|
|
ip := ni.Addr.IP.To4()
|
|
if len(ip) != 4 {
|
|
return errors.New("expected ipv4 address")
|
|
}
|
|
if n := copy(b[20:], ip); n != 4 {
|
|
panic(n)
|
|
}
|
|
binary.BigEndian.PutUint16(b[24:], uint16(ni.Addr.Port))
|
|
return nil
|
|
}
|
|
|
|
func (ni *NodeInfo) UnmarshalCompactIPv4(b []byte) error {
|
|
if len(b) != CompactIPv4NodeInfoLen {
|
|
return errors.New("expected 26 bytes")
|
|
}
|
|
missinggo.CopyExact(ni.ID[:], b[:20])
|
|
ni.Addr = &net.UDPAddr{
|
|
IP: append(make([]byte, 0, 4), b[20:24]...),
|
|
Port: int(binary.BigEndian.Uint16(b[24:26])),
|
|
}
|
|
return nil
|
|
}
|