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New flag Firewall in the Features field to inform uncontacted peers that a Traverse message might be required to establish a connection. Close #61

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This flag can be activated via the config setting LocalFirewall.
The Features field exists in Announcement/Response messages and was now added to peer records.
This commit is contained in:
Kleissner
2021-11-20 04:28:03 +01:00
parent 446c62bcd9
commit f7e8f1821b
11 changed files with 54 additions and 20 deletions
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8
Bootstrap.go
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@@ -105,7 +105,7 @@ func (peer *rootPeer) contact() {
for _, address := range peer.addresses {
// Port internal is always set to 0 for root peers. It disables NAT detection and will not send out a Traverse message.
contactArbitraryPeer(peer.publicKey, address, 0)
contactArbitraryPeer(peer.publicKey, address, 0, false)
}
}
@@ -205,7 +205,7 @@ func (nets *Networks) autoMulticastBroadcast() {
}
// contactArbitraryPeer contacts a new arbitrary peer for the first time.
func contactArbitraryPeer(publicKey *btcec.PublicKey, address *net.UDPAddr, receiverPortInternal uint16) (contacted bool) {
func contactArbitraryPeer(publicKey *btcec.PublicKey, address *net.UDPAddr, receiverPortInternal uint16, receiverFirewall bool) (contacted bool) {
findSelf := ShouldSendFindSelf()
_, blockchainHeight, blockchainVersion := UserBlockchain.Header()
packets := protocol.EncodeAnnouncement(true, findSelf, nil, nil, nil, FeatureSupport(), blockchainHeight, blockchainVersion, userAgent)
@@ -216,7 +216,7 @@ func contactArbitraryPeer(publicKey *btcec.PublicKey, address *net.UDPAddr, rece
Filters.MessageOutAnnouncement(publicKey, nil, raw, findSelf, nil, nil, nil)
networks.sendAllNetworks(publicKey, raw, address, receiverPortInternal, nil, &bootstrapFindSelf{})
networks.sendAllNetworks(publicKey, raw, address, receiverPortInternal, receiverFirewall, nil, &bootstrapFindSelf{})
return true
}
@@ -258,7 +258,7 @@ func (peer *PeerInfo) cmdResponseBootstrapFindSelf(msg *protocol.MessageResponse
}
// Initiate contact. Once a response comes back, the peer will be actually added to the peer list.
contactArbitraryPeer(closePeer.PublicKey, &net.UDPAddr{IP: address.IP, Port: int(address.Port)}, address.PortInternal)
contactArbitraryPeer(closePeer.PublicKey, &net.UDPAddr{IP: address.IP, Port: int(address.Port)}, address.PortInternal, closePeer.Features&(1<<protocol.FeatureFirewall) > 0)
}
}
}