Exemple #1
0
// Fetch a given number of best (most recenty seen) peers.
func GetBestPeers(limit uint, isConnected func(*PeerAddr) bool) (res manyPeers) {
	if proxyPeer != nil {
		if isConnected == nil || !isConnected(proxyPeer) {
			return manyPeers{proxyPeer}
		}
		return manyPeers{}
	}
	peerdb_mutex.Lock()
	tmp := make(manyPeers, 0)
	PeerDB.Browse(func(k qdb.KeyType, v []byte) uint32 {
		ad := NewPeer(v)
		if ad.Banned == 0 && sys.ValidIp4(ad.Ip4[:]) && !sys.IsIPBlocked(ad.Ip4[:]) {
			if isConnected == nil || !isConnected(ad) {
				tmp = append(tmp, ad)
			}
		}
		return 0
	})
	peerdb_mutex.Unlock()
	// Copy the top rows to the result buffer
	if len(tmp) > 0 {
		sort.Sort(tmp)
		if uint(len(tmp)) < limit {
			limit = uint(len(tmp))
		}
		res = make(manyPeers, limit)
		copy(res, tmp[:limit])
	}
	return
}
Exemple #2
0
func NewPeerFromString(ipstr string, force_default_port bool) (p *PeerAddr, e error) {
	port := DefaultTcpPort()
	x := strings.Index(ipstr, ":")
	if x != -1 {
		if !force_default_port {
			v, er := strconv.ParseUint(ipstr[x+1:], 10, 32)
			if er != nil {
				e = er
				return
			}
			if v > 0xffff {
				e = errors.New("Port number too big")
				return
			}
			port = uint16(v)
		}
		ipstr = ipstr[:x] // remove port number
	}
	ip := net.ParseIP(ipstr)
	if ip != nil && len(ip) == 16 {
		if sys.IsIPBlocked(ip[12:16]) {
			e = errors.New(ipstr + " is blocked")
			return
		}
		p = NewEmptyPeer()
		copy(p.Ip4[:], ip[12:16])
		p.Services = Services
		copy(p.Ip6[:], ip[:12])
		p.Port = port
		if dbp := PeerDB.Get(qdb.KeyType(p.UniqID())); dbp != nil && NewPeer(dbp).Banned != 0 {
			e = errors.New(p.Ip() + " is banned")
			p = nil
		} else {
			p.Time = uint32(time.Now().Unix())
			p.Save()
		}
	} else {
		e = errors.New("Error parsing IP '" + ipstr + "'")
	}
	return
}