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handshake.go
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handshake.go
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package p2p
import (
"net"
"time"
cmn "github.com/lianxiangcloud/linkchain/libs/common"
"github.com/lianxiangcloud/linkchain/libs/ser"
)
var (
//HandShakeFunc is the gloable fuction of p2p handshake
HandShakeFunc = defaultHandshakeTimeout
)
func defaultHandshakeTimeout(
conn net.Conn,
ourNodeInfo NodeInfo,
timeout time.Duration,
isInCon bool,
) (peerNodeInfo NodeInfo, err error) {
// Set deadline for handshake so we don't block forever on conn.ReadFull
if err := conn.SetDeadline(time.Now().Add(timeout)); err != nil {
return peerNodeInfo, cmn.ErrorWrap(err, "Error setting deadline")
}
var trs, _ = cmn.Parallel(
func(_ int) (val interface{}, err error, abort bool) {
_, err = ser.EncodeWriterWithType(conn, ourNodeInfo)
return
},
func(_ int) (val interface{}, err error, abort bool) {
_, err = ser.DecodeReaderWithType(
conn,
&peerNodeInfo,
int64(MaxNodeInfoSize()),
)
return
},
)
if err := trs.FirstError(); err != nil {
return peerNodeInfo, cmn.ErrorWrap(err, "Error during handshake")
}
// Remove deadline
if err := conn.SetDeadline(time.Time{}); err != nil {
return peerNodeInfo, cmn.ErrorWrap(err, "Error removing deadline")
}
return peerNodeInfo, nil
}