137 lines
3.9 KiB
Go
137 lines
3.9 KiB
Go
// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package p2p
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//import "fmt"
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//import "net"
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import "sync"
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import "time"
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//import "container/list"
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//import log "github.com/sirupsen/logrus"
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//import "github.com/vmihailenco/msgpack"
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import "github.com/deroproject/derohe/crypto"
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//import "github.com/deroproject/derosuite/globals"
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import "github.com/deroproject/derohe/block"
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// if block request pool is empty, we are syncronised otherwise we are syncronising
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var block_request_pool = map[crypto.Hash]uint64{} // these are received, we must attach a connection to blacklist peers
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var block_received = map[crypto.Hash]*block.Complete_Block{} // once blocks are received, they are placed here
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var block_request_pool_mutex sync.Mutex
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func queue_block(blid crypto.Hash) {
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block_request_pool_mutex.Lock()
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defer block_request_pool_mutex.Unlock()
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// if object has already been received, it no longer should be request
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if _, ok := block_received[blid]; ok { // object is already in pool
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return
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}
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// if object has already been requested, skip it , else add it to queue
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if _, ok := block_request_pool[blid]; !ok {
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block_request_pool[blid] = 0
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}
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}
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// a block hash been received, make it ready for consumption
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func queue_block_received(blid crypto.Hash, cbl *block.Complete_Block) {
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block_request_pool_mutex.Lock()
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defer block_request_pool_mutex.Unlock()
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if _, ok := block_request_pool[blid]; !ok {
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// unknown object received discard it
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return
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}
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delete(block_request_pool, blid)
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block_received[blid] = cbl
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}
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// continusly retrieve_objects
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func retrieve_objects() {
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for {
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select {
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case <-Exit_Event:
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return
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case <-time.After(5 * time.Second):
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}
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block_request_pool_mutex.Lock()
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for k, _ := range block_request_pool {
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connection := Random_Connection(0)
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if connection != nil {
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connection.Send_ObjectRequest([]crypto.Hash{k}, []crypto.Hash{})
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}
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}
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block_request_pool_mutex.Unlock()
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}
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}
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// this goroutine will keep searching the queue for any blocks and see if they are can be attached somewhere, if yes they will be attached and cleaned up
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func sync_retrieved_blocks() {
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// success := make(chan bool)
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for {
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select {
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case <-Exit_Event:
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return
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//case <- success:
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case <-time.After(1 * time.Second):
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}
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block_request_pool_mutex.Lock()
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for blid, cbl := range block_received {
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if chain.Is_Block_Topological_order(blid) { /// block is already in chain, discard it
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delete(block_received, blid)
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continue
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}
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_ = cbl
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/*if cbl == nil {
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delete(block_received,blid)
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block_request_pool[blid]=0 // need to request object again
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continue
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}*/
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/*
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// attach it to parent, else skip for now
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if chain.Block_Exists(cbl.Bl.Prev_Hash) {
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if chain.Add_Complete_Block(cbl) {
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// if block successfully added , delete it now
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delete(block_received, blid)
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continue
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} else { // checksum of something failed, request it randomly from another peer
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block_request_pool[blid] = 0
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}
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}*/
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}
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block_request_pool_mutex.Unlock()
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}
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}
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