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network: rework discoverer/server interaction

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* treat connected/handshaked peers separately in the discoverer, save
   "original" address for connected ones, it can be a name instead of IP and
   it's important to keep it to avoid reconnections
 * store name->IP mapping for seeds if and when they're connected to avoid
   reconnections
 * block seed if it's detected to be our own node (which is often the case for
   small private networks)
 * add an event for handshaked peers in the server, connected but
   non-handshaked ones are not really helpful for MinPeers or GetAddr logic

Fixes #2796.
This commit is contained in:
Roman Khimov 2022-11-17 17:07:19 +03:00
parent 6ba4afc977
commit 23f118a1a9
10 changed files with 180 additions and 100 deletions
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21
pkg/network/peer.go
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@ -7,10 +7,12 @@ import (
"github.com/nspcc-dev/neo-go/pkg/network/payload"
)
// Peer represents a network node neo-go is connected to.
type Peer interface {
// RemoteAddr returns the remote address that we're connected to now.
RemoteAddr() net.Addr
type AddressablePeer interface {
// ConnectionAddr returns an address-like identifier of this connection
// before we have a proper one (after the handshake). It's either the
// address from discoverer (if initiated from node) or one from socket
// (if connected to node from outside).
ConnectionAddr() string
// PeerAddr returns the remote address that should be used to establish
// a new connection to the node. It can differ from the RemoteAddr
// address in case the remote node is a client and its current
@ -18,6 +20,16 @@ type Peer interface {
// to connect to it. It's only valid after the handshake is completed.
// Before that, it returns the same address as RemoteAddr.
PeerAddr() net.Addr
// Version returns peer's version message if the peer has handshaked
// already.
Version() *payload.Version
}
// Peer represents a network node neo-go is connected to.
type Peer interface {
AddressablePeer
// RemoteAddr returns the remote address that we're connected to now.
RemoteAddr() net.Addr
Disconnect(error)
// BroadcastPacket is a context-bound packet enqueuer, it either puts the
@ -49,7 +61,6 @@ type Peer interface {
// EnqueueHPPacket is similar to EnqueueHPMessage, but accepts a slice of
// message(s) bytes.
EnqueueHPPacket([]byte) error
Version() *payload.Version
LastBlockIndex() uint32
Handshaked() bool
IsFullNode() bool