mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
102 lines
3.1 KiB
Go
102 lines
3.1 KiB
Go
package sync
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import (
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"bytes"
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"errors"
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libp2pcore "github.com/libp2p/go-libp2p-core"
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"github.com/libp2p/go-libp2p-core/helpers"
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"github.com/libp2p/go-libp2p-core/mux"
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"github.com/libp2p/go-libp2p-core/network"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p/encoder"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p/types"
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"github.com/prysmaticlabs/prysm/shared/params"
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"github.com/sirupsen/logrus"
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)
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var responseCodeSuccess = byte(0x00)
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var responseCodeInvalidRequest = byte(0x01)
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var responseCodeServerError = byte(0x02)
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func (s *Service) generateErrorResponse(code byte, reason string) ([]byte, error) {
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return createErrorResponse(code, reason, s.p2p)
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}
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// ReadStatusCode response from a RPC stream.
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func ReadStatusCode(stream network.Stream, encoding encoder.NetworkEncoding) (uint8, string, error) {
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// Set ttfb deadline.
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SetStreamReadDeadline(stream, params.BeaconNetworkConfig().TtfbTimeout)
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b := make([]byte, 1)
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_, err := stream.Read(b)
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if err != nil {
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return 0, "", err
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}
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if b[0] == responseCodeSuccess {
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// Set response deadline on a successful response code.
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SetStreamReadDeadline(stream, params.BeaconNetworkConfig().RespTimeout)
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return 0, "", nil
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}
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// Set response deadline, when reading error message.
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SetStreamReadDeadline(stream, params.BeaconNetworkConfig().RespTimeout)
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msg := &types.ErrorMessage{}
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if err := encoding.DecodeWithMaxLength(stream, msg); err != nil {
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return 0, "", err
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}
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return b[0], string(*msg), nil
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}
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func writeErrorResponseToStream(responseCode byte, reason string, stream libp2pcore.Stream, encoder p2p.EncodingProvider) {
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resp, err := createErrorResponse(responseCode, reason, encoder)
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if err != nil {
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log.WithError(err).Debug("Could not generate a response error")
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} else if _, err := stream.Write(resp); err != nil {
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log.WithError(err).Debugf("Could not write to stream")
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}
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}
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func createErrorResponse(code byte, reason string, encoder p2p.EncodingProvider) ([]byte, error) {
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buf := bytes.NewBuffer([]byte{code})
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errMsg := types.ErrorMessage(reason)
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if _, err := encoder.Encoding().EncodeWithMaxLength(buf, &errMsg); err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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// reads data from the stream without applying any timeouts.
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func readStatusCodeNoDeadline(stream network.Stream, encoding encoder.NetworkEncoding) (uint8, string, error) {
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b := make([]byte, 1)
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_, err := stream.Read(b)
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if err != nil {
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return 0, "", err
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}
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if b[0] == responseCodeSuccess {
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return 0, "", nil
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}
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msg := &types.ErrorMessage{}
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if err := encoding.DecodeWithMaxLength(stream, msg); err != nil {
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return 0, "", err
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}
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return b[0], string(*msg), nil
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}
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// only returns true for errors that are valid (no resets or expectedEOF errors).
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func isValidStreamError(err error) bool {
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return err != nil && !errors.Is(err, mux.ErrReset) && !errors.Is(err, helpers.ErrExpectedEOF)
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}
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func closeStream(stream network.Stream, log *logrus.Entry) {
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if err := helpers.FullClose(stream); err != nil && err.Error() != mux.ErrReset.Error() {
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log.WithError(err).Debug("Could not reset stream")
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}
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}
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