// startListening on the network addresses
func startListening(ctx context.Context, host p2phost.Host, cfg *config.Config) error {
listenAddrs, err := listenAddresses(cfg)
if err != nil {
return err
}
// make sure we error out if our config does not have addresses we can use
log.Debugf("Config.Addresses.Swarm:%s", listenAddrs)
filteredAddrs := addrutil.FilterUsableAddrs(listenAddrs)
log.Debugf("Config.Addresses.Swarm:%s (filtered)", filteredAddrs)
if len(filteredAddrs) < 1 {
return fmt.Errorf("addresses in config not usable: %s", listenAddrs)
}
// Actually start listening:
if err := host.Network().Listen(filteredAddrs...); err != nil {
return err
}
// list out our addresses
addrs, err := host.Network().InterfaceListenAddresses()
if err != nil {
return err
}
log.Infof("Swarm listening at: %s", addrs)
return nil
}
func NewIDService(h host.Host) *IDService {
s := &IDService{
Host: h,
currid: make(map[inet.Conn]chan struct{}),
}
h.SetStreamHandler(ID, s.RequestHandler)
return s
}
func NewRelayService(h host.Host, sh inet.StreamHandler) *RelayService {
s := &RelayService{
host: h,
handler: sh,
}
h.SetStreamHandler(ID, s.requestHandler)
return s
}
// NewDiagnostics instantiates a new diagnostics service running on the given network
func NewDiagnostics(self peer.ID, h host.Host) *Diagnostics {
d := &Diagnostics{
host: h,
self: self,
birth: time.Now(),
diagMap: make(map[string]time.Time),
}
h.SetStreamHandler(ProtocolDiag, d.handleNewStream)
return d
}
// NewFromIpfsHost returns a BitSwapNetwork supported by underlying IPFS host
func NewFromIpfsHost(host host.Host, r routing.IpfsRouting) BitSwapNetwork {
bitswapNetwork := impl{
host: host,
routing: r,
}
host.SetStreamHandler(ProtocolBitswap, bitswapNetwork.handleNewStream)
host.Network().Notify((*netNotifiee)(&bitswapNetwork))
// TODO: StopNotify.
return &bitswapNetwork
}
func getDialableListenAddrs(ph host.Host) ([]*net.TCPAddr, error) {
var out []*net.TCPAddr
for _, addr := range ph.Addrs() {
na, err := manet.ToNetAddr(addr)
if err != nil {
continue
}
tcp, ok := na.(*net.TCPAddr)
if ok {
out = append(out, tcp)
}
}
if len(out) == 0 {
return nil, errors.New("failed to find good external addr from peerhost")
}
return out, nil
}
func bootstrapRound(ctx context.Context, host host.Host, cfg BootstrapConfig) error {
ctx, cancel := context.WithTimeout(ctx, cfg.ConnectionTimeout)
defer cancel()
id := host.ID()
// get bootstrap peers from config. retrieving them here makes
// sure we remain observant of changes to client configuration.
peers := cfg.BootstrapPeers()
// determine how many bootstrap connections to open
connected := host.Network().Peers()
if len(connected) >= cfg.MinPeerThreshold {
log.Event(ctx, "bootstrapSkip", id)
log.Debugf("%s core bootstrap skipped -- connected to %d (> %d) nodes",
id, len(connected), cfg.MinPeerThreshold)
return nil
}
numToDial := cfg.MinPeerThreshold - len(connected)
// filter out bootstrap nodes we are already connected to
var notConnected []peer.PeerInfo
for _, p := range peers {
if host.Network().Connectedness(p.ID) != inet.Connected {
notConnected = append(notConnected, p)
}
}
// if connected to all bootstrap peer candidates, exit
if len(notConnected) < 1 {
log.Debugf("%s no more bootstrap peers to create %d connections", id, numToDial)
return ErrNotEnoughBootstrapPeers
}
// connect to a random susbset of bootstrap candidates
randSubset := randomSubsetOfPeers(notConnected, numToDial)
defer log.EventBegin(ctx, "bootstrapStart", id).Done()
log.Debugf("%s bootstrapping to %d nodes: %s", id, numToDial, randSubset)
if err := bootstrapConnect(ctx, host, randSubset); err != nil {
return err
}
return nil
}
func NewMdnsService(peerhost host.Host, interval time.Duration) (Service, error) {
// TODO: dont let mdns use logging...
golog.SetOutput(ioutil.Discard)
var ipaddrs []net.IP
port := 4001
addrs, err := getDialableListenAddrs(peerhost)
if err != nil {
log.Warning(err)
} else {
port = addrs[0].Port
for _, a := range addrs {
ipaddrs = append(ipaddrs, a.IP)
}
}
myid := peerhost.ID().Pretty()
info := []string{myid}
service, err := mdns.NewMDNSService(myid, ServiceTag, "", "", port, ipaddrs, info)
if err != nil {
return nil, err
}
// Create the mDNS server, defer shutdown
server, err := mdns.NewServer(&mdns.Config{Zone: service})
if err != nil {
return nil, err
}
s := &mdnsService{
server: server,
service: service,
host: peerhost,
interval: interval,
}
go s.pollForEntries()
return s, nil
}
// NewDHT creates a new DHT object with the given peer as the 'local' host
func NewDHT(ctx context.Context, h host.Host, dstore ds.ThreadSafeDatastore) *IpfsDHT {
dht := new(IpfsDHT)
dht.datastore = dstore
dht.self = h.ID()
dht.peerstore = h.Peerstore()
dht.host = h
// register for network notifs.
dht.host.Network().Notify((*netNotifiee)(dht))
dht.proc = goprocess.WithTeardown(func() error {
// remove ourselves from network notifs.
dht.host.Network().StopNotify((*netNotifiee)(dht))
return nil
})
dht.ctx = ctx
h.SetStreamHandler(ProtocolDHT, dht.handleNewStream)
dht.providers = NewProviderManager(dht.ctx, dht.self)
dht.proc.AddChild(dht.providers.proc)
goprocessctx.CloseAfterContext(dht.proc, ctx)
dht.routingTable = kb.NewRoutingTable(20, kb.ConvertPeerID(dht.self), time.Minute, dht.peerstore)
dht.birth = time.Now()
dht.Validator = make(record.Validator)
dht.Validator["pk"] = record.PublicKeyValidator
dht.Selector = make(record.Selector)
dht.Selector["pk"] = record.PublicKeySelector
return dht
}
func bootstrapConnect(ctx context.Context, ph host.Host, peers []peer.PeerInfo) error {
if len(peers) < 1 {
return ErrNotEnoughBootstrapPeers
}
errs := make(chan error, len(peers))
var wg sync.WaitGroup
for _, p := range peers {
// performed asynchronously because when performed synchronously, if
// one `Connect` call hangs, subsequent calls are more likely to
// fail/abort due to an expiring context.
// Also, performed asynchronously for dial speed.
wg.Add(1)
go func(p peer.PeerInfo) {
defer wg.Done()
defer log.EventBegin(ctx, "bootstrapDial", ph.ID(), p.ID).Done()
log.Debugf("%s bootstrapping to %s", ph.ID(), p.ID)
ph.Peerstore().AddAddrs(p.ID, p.Addrs, peer.PermanentAddrTTL)
if err := ph.Connect(ctx, p); err != nil {
log.Event(ctx, "bootstrapDialFailed", p.ID)
log.Debugf("failed to bootstrap with %v: %s", p.ID, err)
errs <- err
return
}
log.Event(ctx, "bootstrapDialSuccess", p.ID)
log.Infof("bootstrapped with %v", p.ID)
}(p)
}
wg.Wait()
// our failure condition is when no connection attempt succeeded.
// So drain the errs channel, counting the results.
close(errs)
count := 0
var err error
for err = range errs {
if err != nil {
count++
}
}
if count == len(peers) {
return fmt.Errorf("failed to bootstrap. %s", err)
}
return nil
}