LBRYCommunity/lbcd
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btcd: only allow one getaddr request per peer

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This commit is contained in:
David Hill 2016-11-19 11:19:51 -05:00
parent e8b9147ba2
commit 9bedd7720c
1 changed files with 12 additions and 0 deletions
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12
server.go
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@ -213,6 +213,7 @@ type serverPeer struct {
continueHash *chainhash.Hash continueHash *chainhash.Hash
relayMtx sync.Mutex relayMtx sync.Mutex
disableRelayTx bool disableRelayTx bool
sentAddrs bool
requestQueue []*wire.InvVect requestQueue []*wire.InvVect
requestedTxns map[chainhash.Hash]struct{} requestedTxns map[chainhash.Hash]struct{}
requestedBlocks map[chainhash.Hash]struct{} requestedBlocks map[chainhash.Hash]struct{}
@ -892,9 +893,20 @@ func (sp *serverPeer) OnGetAddr(_ *peer.Peer, msg *wire.MsgGetAddr) {
// Do not accept getaddr requests from outbound peers. This reduces // Do not accept getaddr requests from outbound peers. This reduces
// fingerprinting attacks. // fingerprinting attacks.
if !sp.Inbound() { if !sp.Inbound() {
peerLog.Debugf("Ignoring getaddr request from outbound peer ",
"%v", sp)
return return
} }
// Only allow one getaddr request per connection to discourage
// address stamping of inv announcements.
if sp.sentAddrs {
peerLog.Debugf("Ignoring repeated getaddr request from peer ",
"%v", sp)
return
}
sp.sentAddrs = true
// Get the current known addresses from the address manager. // Get the current known addresses from the address manager.
addrCache := sp.server.addrManager.AddressCache() addrCache := sp.server.addrManager.AddressCache()