You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
154 lines
3.3 KiB
154 lines
3.3 KiB
package privval
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
"github.com/tendermint/tendermint/libs/service"
|
|
)
|
|
|
|
const (
|
|
defaultTimeoutReadWriteSeconds = 3
|
|
)
|
|
|
|
type signerEndpoint struct {
|
|
service.BaseService
|
|
|
|
connMtx sync.Mutex
|
|
conn net.Conn
|
|
|
|
timeoutReadWrite time.Duration
|
|
}
|
|
|
|
// Close closes the underlying net.Conn.
|
|
func (se *signerEndpoint) Close() error {
|
|
se.DropConnection()
|
|
return nil
|
|
}
|
|
|
|
// IsConnected indicates if there is an active connection
|
|
func (se *signerEndpoint) IsConnected() bool {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
return se.isConnected()
|
|
}
|
|
|
|
// TryGetConnection retrieves a connection if it is already available
|
|
func (se *signerEndpoint) GetAvailableConnection(connectionAvailableCh chan net.Conn) bool {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
|
|
// Is there a connection ready?
|
|
select {
|
|
case se.conn = <-connectionAvailableCh:
|
|
return true
|
|
default:
|
|
}
|
|
return false
|
|
}
|
|
|
|
// TryGetConnection retrieves a connection if it is already available
|
|
func (se *signerEndpoint) WaitConnection(connectionAvailableCh chan net.Conn, maxWait time.Duration) error {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
|
|
select {
|
|
case se.conn = <-connectionAvailableCh:
|
|
case <-time.After(maxWait):
|
|
return ErrConnectionTimeout
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// SetConnection replaces the current connection object
|
|
func (se *signerEndpoint) SetConnection(newConnection net.Conn) {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
se.conn = newConnection
|
|
}
|
|
|
|
// IsConnected indicates if there is an active connection
|
|
func (se *signerEndpoint) DropConnection() {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
se.dropConnection()
|
|
}
|
|
|
|
// ReadMessage reads a message from the endpoint
|
|
func (se *signerEndpoint) ReadMessage() (msg SignerMessage, err error) {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
|
|
if !se.isConnected() {
|
|
return nil, fmt.Errorf("endpoint is not connected")
|
|
}
|
|
|
|
// Reset read deadline
|
|
deadline := time.Now().Add(se.timeoutReadWrite)
|
|
|
|
err = se.conn.SetReadDeadline(deadline)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
const maxRemoteSignerMsgSize = 1024 * 10
|
|
_, err = cdc.UnmarshalBinaryLengthPrefixedReader(se.conn, &msg, maxRemoteSignerMsgSize)
|
|
if _, ok := err.(timeoutError); ok {
|
|
if err != nil {
|
|
err = errors.Wrap(ErrReadTimeout, err.Error())
|
|
} else {
|
|
err = errors.Wrap(ErrReadTimeout, "Empty error")
|
|
}
|
|
se.Logger.Debug("Dropping [read]", "obj", se)
|
|
se.dropConnection()
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// WriteMessage writes a message from the endpoint
|
|
func (se *signerEndpoint) WriteMessage(msg SignerMessage) (err error) {
|
|
se.connMtx.Lock()
|
|
defer se.connMtx.Unlock()
|
|
|
|
if !se.isConnected() {
|
|
return errors.Wrap(ErrNoConnection, "endpoint is not connected")
|
|
}
|
|
|
|
// Reset read deadline
|
|
deadline := time.Now().Add(se.timeoutReadWrite)
|
|
err = se.conn.SetWriteDeadline(deadline)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
_, err = cdc.MarshalBinaryLengthPrefixedWriter(se.conn, msg)
|
|
if _, ok := err.(timeoutError); ok {
|
|
if err != nil {
|
|
err = errors.Wrap(ErrWriteTimeout, err.Error())
|
|
} else {
|
|
err = errors.Wrap(ErrWriteTimeout, "Empty error")
|
|
}
|
|
se.dropConnection()
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (se *signerEndpoint) isConnected() bool {
|
|
return se.conn != nil
|
|
}
|
|
|
|
func (se *signerEndpoint) dropConnection() {
|
|
if se.conn != nil {
|
|
if err := se.conn.Close(); err != nil {
|
|
se.Logger.Error("signerEndpoint::dropConnection", "err", err)
|
|
}
|
|
se.conn = nil
|
|
}
|
|
}
|