github.com/bigzoro/my_simplechain@v0.0.0-20240315012955-8ad0a2a29bb9/consensus/pbft/core/request.go (about)

     1  // Copyright 2020 The go-simplechain Authors
     2  // This file is part of the go-simplechain library.
     3  //
     4  // The go-simplechain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-simplechain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-simplechain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package core
    18  
    19  import (
    20  	"github.com/bigzoro/my_simplechain/consensus/pbft"
    21  	"github.com/bigzoro/my_simplechain/log"
    22  )
    23  
    24  func (c *core) handleRequest(request *pbft.Request) error {
    25  	logger := c.logger.New("state", c.state, "seq", c.current.sequence)
    26  	log.Report("> handleRequest")
    27  
    28  	if err := c.checkRequestMsg(request); err != nil {
    29  		if err == errInvalidMessage {
    30  			logger.Warn("invalid request")
    31  			return err
    32  		}
    33  		logger.Warn("unexpected request", "err", err, "number", request.Proposal.Number(), "hash", request.Proposal.PendingHash())
    34  		return err
    35  	}
    36  
    37  	logger.Trace("handleRequest", "number", request.Proposal.Number(), "hash", request.Proposal.PendingHash())
    38  
    39  	c.current.pendingRequest = request
    40  	if c.state == StateAcceptRequest {
    41  		c.sendPreprepare(request)
    42  	}
    43  	return nil
    44  }
    45  
    46  // check request state
    47  // return errInvalidMessage if the message is invalid
    48  // return errFutureMessage if the sequence of proposal is larger than current sequence
    49  // return errOldMessage if the sequence of proposal is smaller than current sequence
    50  func (c *core) checkRequestMsg(request *pbft.Request) error {
    51  	if request == nil || request.Proposal == nil {
    52  		return errInvalidMessage
    53  	}
    54  
    55  	if c := c.current.sequence.Cmp(request.Proposal.Number()); c > 0 {
    56  		return errOldMessage
    57  	} else if c < 0 {
    58  		return errFutureMessage
    59  	} else {
    60  		return nil
    61  	}
    62  }
    63  
    64  func (c *core) storeRequestMsg(request *pbft.Request) {
    65  	logger := c.logger.New("state", c.state)
    66  
    67  	//logger.Trace("Store future request", "number", request.Proposal.Number(), "hash", request.Proposal.Hash())
    68  	logger.Trace("Store future request", "number", request.Proposal.Number(), "hash", request.Proposal.PendingHash())
    69  
    70  	c.pendingRequestsMu.Lock()
    71  	defer c.pendingRequestsMu.Unlock()
    72  
    73  	c.pendingRequests.Push(request, -request.Proposal.Number().Int64())
    74  }
    75  
    76  func (c *core) processPendingRequests() {
    77  	c.pendingRequestsMu.Lock()
    78  	defer c.pendingRequestsMu.Unlock()
    79  
    80  	for !(c.pendingRequests.Empty()) {
    81  		m, prio := c.pendingRequests.Pop()
    82  		r, ok := m.(*pbft.Request)
    83  		if !ok {
    84  			c.logger.Warn("Malformed request, skip", "msg", m)
    85  			continue
    86  		}
    87  		// Push back if it's a future message
    88  		err := c.checkRequestMsg(r)
    89  		if err != nil {
    90  			if err == errFutureMessage {
    91  				//c.logger.Trace("Stop processing request", "number", r.Proposal.Number(), "hash", r.Proposal.Hash())
    92  				c.logger.Trace("Stop processing request", "number", r.Proposal.Number(), "hash", r.Proposal.PendingHash())
    93  				c.pendingRequests.Push(m, prio)
    94  				break
    95  			}
    96  			//c.logger.Trace("Skip the pending request", "number", r.Proposal.Number(), "hash", r.Proposal.Hash(), "err", err)
    97  			c.logger.Trace("Skip the pending request", "number", r.Proposal.Number(), "hash", r.Proposal.PendingHash(), "err", err)
    98  			continue
    99  		}
   100  		//c.logger.Trace("Post pending request", "number", r.Proposal.Number(), "hash", r.Proposal.Hash())
   101  		c.logger.Trace("Post pending request", "number", r.Proposal.Number(), "hash", r.Proposal.PendingHash())
   102  
   103  		go c.sendEvent(pbft.RequestEvent{
   104  			Proposal: r.Proposal,
   105  		})
   106  	}
   107  }