// 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
}
func NewPeerFromString(ipstr string) (p *PeerAddr, e error) {
port := DefaultTcpPort()
x := strings.Index(ipstr, ":")
if x != -1 {
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
}