120 lines
3.0 KiB
Go
120 lines
3.0 KiB
Go
package zcash
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import (
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"runtime"
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"strconv"
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"time"
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"github.com/btcsuite/btcd/addrmgr"
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"github.com/btcsuite/btcd/peer"
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"github.com/btcsuite/btcd/wire"
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)
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func (s *Seeder) onVerAck(p *peer.Peer, msg *wire.MsgVerAck) {
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pk := peerKeyFromPeer(p)
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// Check if we're expecting to hear from this peer
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_, ok := s.pendingPeers.Load(pk)
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if !ok {
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s.logger.Printf("Got verack from unexpected peer %s", p.Addr())
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// TODO: probably want to disconnect from the peer sending us out-of-order veracks
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return
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}
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// Add to set of live peers
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s.livePeers.Store(pk, p)
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// Remove from set of pending peers
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s.pendingPeers.Delete(pk)
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// Signal successful connection
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if signal, ok := s.handshakeSignals.Load(pk); ok {
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signal.(chan struct{}) <- struct{}{}
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} else {
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s.logger.Printf("Got verack from peer without a callback channel: %s", p.Addr())
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s.DisconnectPeer(pk)
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return
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}
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// Add to list of known good addresses if we don't already have it.
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// Otherwise, update the last-valid time.
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if s.addrBook.IsKnown(pk) {
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s.addrBook.Touch(pk)
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} else {
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s.logger.Printf("Adding %s to address list", pk)
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s.addrBook.Add(pk)
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}
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return
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}
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func (s *Seeder) onAddr(p *peer.Peer, msg *wire.MsgAddr) {
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if len(msg.AddrList) == 0 {
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s.logger.Printf("Got empty addr message from peer %s. Disconnecting.", p.Addr())
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s.DisconnectPeer(peerKeyFromPeer(p))
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return
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}
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s.logger.Printf("Got %d addrs from peer %s", len(msg.AddrList), p.Addr())
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queue := make(chan *wire.NetAddress, len(msg.AddrList))
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for _, na := range msg.AddrList {
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queue <- na
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}
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for i := 0; i < runtime.NumCPU()*2; i++ {
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go func() {
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var na *wire.NetAddress
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for {
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select {
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case next := <-queue:
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// Pull the next address off the queue
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na = next
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case <-time.After(1 * time.Second):
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// Or die if there wasn't one
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return
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}
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// Note that AllowSelfConns is only exposed in a fork of btcd
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// pending https://github.com/btcsuite/btcd/pull/1481, which
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// is why the module `replace`s btcd.
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if !addrmgr.IsRoutable(na) && !s.config.AllowSelfConns {
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s.logger.Printf("Got bad addr %s:%d from peer %s", na.IP, na.Port, p.Addr())
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s.DisconnectAndBlacklist(peerKeyFromPeer(p))
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continue
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}
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potentialPeer := peerKeyFromNA(na)
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if s.addrBook.IsKnown(potentialPeer) {
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s.logger.Printf("Already knew about %s:%d", na.IP, na.Port)
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continue
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}
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if s.addrBook.IsBlacklisted(potentialPeer) {
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s.logger.Printf("Previously blacklisted %s:%d", na.IP, na.Port)
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continue
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}
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portString := strconv.Itoa(int(na.Port))
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err := s.Connect(na.IP.String(), portString)
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if err != nil {
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s.logger.Printf("Got unusable peer %s:%d from peer %s. Error: %s", na.IP, na.Port, p.Addr(), err)
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// Blacklist the potential peer. We might try to connect again later,
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// since we assume IsRoutable filtered out the truly wrong ones.
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s.addrBook.Blacklist(potentialPeer)
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continue
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}
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s.DisconnectPeer(potentialPeer)
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s.addrBook.Add(potentialPeer)
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}
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}()
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}
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}
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