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package dex
import (
"net"
"sync"
"github.com/dexon-foundation/dexon/common"
"github.com/dexon-foundation/dexon/crypto/sha3"
"github.com/dexon-foundation/dexon/event"
"github.com/dexon-foundation/dexon/log"
"github.com/dexon-foundation/dexon/p2p/enode"
"github.com/dexon-foundation/dexon/rlp"
)
type NodeMeta struct {
ID enode.ID
IP net.IP
UDP int
TCP int
Timestamp uint64
Sig []byte
}
func (n *NodeMeta) Hash() (h common.Hash) {
hw := sha3.NewKeccak256()
rlp.Encode(hw, n)
hw.Sum(h[:0])
return h
}
type newMetasEvent struct{ Metas []*NodeMeta }
type nodeTable struct {
mu sync.RWMutex
entry map[enode.ID]*NodeMeta
feed event.Feed
}
func newNodeTable() *nodeTable {
return &nodeTable{
entry: make(map[enode.ID]*NodeMeta),
}
}
func (t *nodeTable) Get(id enode.ID) *NodeMeta {
t.mu.RLock()
defer t.mu.RUnlock()
return t.entry[id]
}
func (t *nodeTable) Add(metas []*NodeMeta) {
t.mu.Lock()
defer t.mu.Unlock()
var newMetas []*NodeMeta
for _, meta := range metas {
// TODO: validate the meta
if e, ok := t.entry[meta.ID]; ok && e.Timestamp > meta.Timestamp {
continue
}
t.entry[meta.ID] = meta
newMetas = append(newMetas, meta)
log.Trace("add new node meta", "id", meta.ID[:8],
"ip", meta.IP, "udp", meta.UDP, "tcp", meta.TCP)
}
t.feed.Send(newMetasEvent{newMetas})
}
func (t *nodeTable) Metas() []*NodeMeta {
t.mu.RLock()
defer t.mu.RUnlock()
metas := make([]*NodeMeta, 0, len(t.entry))
for _, meta := range t.entry {
metas = append(metas, meta)
}
return metas
}
func (t *nodeTable) SubscribeNewMetasEvent(
ch chan<- newMetasEvent) event.Subscription {
return t.feed.Subscribe(ch)
}
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