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Version 0.4.7

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Merge pull request #986 from yggdrasil-network/develop
This commit is contained in:
Neil Alexander 2022-11-20 21:20:11 +00:00 committed by GitHub
commit 14f1cd4696
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16 changed files with 192 additions and 46 deletions
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18
CHANGELOG.md
View File

@ -26,6 +26,24 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
- in case of vulnerabilities.
-->
## [0.4.7] - 2022-11-20
### Added
- Dropped outbound peerings will now try to reconnect after a single second, rather than waiting up to 60 seconds for the normal peer timer
### Changed
- Session encryption keys are now rotated at most once per minute, which reduces CPU usage and improves throughput on fast low latency links
- Buffers are now reused in the session encryption handler, which improves session throughput and reduces memory allocations
- Buffers are now reused in the router for DHT and path traffic, which improves overall routing throughput and reduces memory allocations
### Fixed
- A bug in the admin socket where requests fail unless `arguments` is specified has been fixed
- Certificates on TLS listeners will no longer expire after a year
- The `-address` and `-subnet` command line options now return a useful warning when no configuration is specified
## [0.4.6] - 2022-10-25
### Added

7
cmd/yggdrasil/main.go
View File

@ -247,7 +247,12 @@ func run(args yggArgs, ctx context.Context) {
return
default:
// No flags were provided, therefore print the list of flags to stdout.
fmt.Println("Usage:")
flag.PrintDefaults()
if args.getaddr || args.getsnet {
fmt.Println("\nError: You need to specify some config data using -useconf or -useconffile.")
}
}
// Have we got a working configuration? If we don't then it probably means
// that neither -autoconf, -useconf or -useconffile were set above. Stop
@ -339,7 +344,7 @@ func run(args yggArgs, ctx context.Context) {
Beacon: intf.Beacon,
Listen: intf.Listen,
Port: intf.Port,
Priority: intf.Priority,
Priority: uint8(intf.Priority),
})
}
if n.multicast, err = multicast.New(n.core, logger, options...); err != nil {

28
contrib/mobile/mobile.go
View File

@ -87,7 +87,7 @@ func (m *Yggdrasil) StartJSON(configjson []byte) error {
Beacon: intf.Beacon,
Listen: intf.Listen,
Port: intf.Port,
Priority: intf.Priority,
Priority: uint8(intf.Priority),
})
}
m.multicast, err = multicast.New(m.core, logger, options...)
@ -115,6 +115,18 @@ func (m *Yggdrasil) Send(p []byte) error {
return nil
}
// Send sends a packet from given buffer to Yggdrasil. From first byte up to length.
func (m *Yggdrasil) SendBuffer(p []byte, length int) error {
if m.iprwc == nil {
return nil
}
if len(p) < length {
return nil
}
_, _ = m.iprwc.Write(p[:length])
return nil
}
// Recv waits for and reads a packet coming from Yggdrasil. It
// will be a fully formed IPv6 packet
func (m *Yggdrasil) Recv() ([]byte, error) {
@ -126,6 +138,15 @@ func (m *Yggdrasil) Recv() ([]byte, error) {
return buf[:n], nil
}
// Recv waits for and reads a packet coming from Yggdrasil to given buffer, returning size of packet
func (m *Yggdrasil) RecvBuffer(buf []byte) (int, error) {
if m.iprwc == nil {
return 0, nil
}
n, _ := m.iprwc.Read(buf)
return n, nil
}
// Stop the mobile Yggdrasil instance
func (m *Yggdrasil) Stop() error {
logger := log.New(m.log, "", 0)
@ -138,6 +159,11 @@ func (m *Yggdrasil) Stop() error {
return nil
}
// Retry resets the peer connection timer and tries to dial them immediately.
func (m *Yggdrasil) RetryPeersNow() {
m.core.RetryPeersNow()
}
// GenerateConfigJSON generates mobile-friendly configuration in JSON format
func GenerateConfigJSON() []byte {
nc := defaults.GenerateConfig()

4
go.mod
View File

@ -3,7 +3,7 @@ module github.com/yggdrasil-network/yggdrasil-go
go 1.17
require (
github.com/Arceliar/ironwood v0.0.0-20221025225125-45b4281814c2
github.com/Arceliar/ironwood v0.0.0-20221115123222-ec61cea2f439
github.com/Arceliar/phony v0.0.0-20210209235338-dde1a8dca979
github.com/cheggaaa/pb/v3 v3.0.8
github.com/gologme/log v1.2.0
@ -12,7 +12,7 @@ require (
github.com/kardianos/minwinsvc v1.0.2
github.com/mitchellh/mapstructure v1.4.1
github.com/vishvananda/netlink v1.1.0
golang.org/x/mobile v0.0.0-20221012134814-c746ac228303
golang.org/x/mobile v0.0.0-20221110043201-43a038452099
golang.org/x/net v0.0.0-20221014081412-f15817d10f9b
golang.org/x/sys v0.0.0-20221013171732-95e765b1cc43
golang.org/x/text v0.3.8

9
go.sum
View File

@ -1,5 +1,5 @@
github.com/Arceliar/ironwood v0.0.0-20221025225125-45b4281814c2 h1:Usab30pNT2i/vZvpXcN9uOr5IO1RZPcUqoGH0DIAPnU=
github.com/Arceliar/ironwood v0.0.0-20221025225125-45b4281814c2/go.mod h1:RP72rucOFm5udrnEzTmIWLRVGQiV/fSUAQXJ0RST/nk=
github.com/Arceliar/ironwood v0.0.0-20221115123222-ec61cea2f439 h1:eOW6/XIs06TnUn9GPCnfv71CQZw8edP3u3mH3lZt6iM=
github.com/Arceliar/ironwood v0.0.0-20221115123222-ec61cea2f439/go.mod h1:RP72rucOFm5udrnEzTmIWLRVGQiV/fSUAQXJ0RST/nk=
github.com/Arceliar/phony v0.0.0-20210209235338-dde1a8dca979 h1:WndgpSW13S32VLQ3ugUxx2EnnWmgba1kCqPkd4Gk1yQ=
github.com/Arceliar/phony v0.0.0-20210209235338-dde1a8dca979/go.mod h1:6Lkn+/zJilRMsKmbmG1RPoamiArC6HS73xbwRyp3UyI=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
@ -55,8 +55,8 @@ golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56/go.mod h1:JhuoJpWY28nO4Vef9t
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20221012134814-c746ac228303 h1:K4fp1rDuJBz0FCPAWzIJwnzwNEM7S6yobdZzMrZ/Zws=
golang.org/x/mobile v0.0.0-20221012134814-c746ac228303/go.mod h1:M32cGdzp91A8Ex9qQtyZinr19EYxzkFqDjW2oyHzTDQ=
golang.org/x/mobile v0.0.0-20221110043201-43a038452099 h1:aIu0lKmfdgtn2uTj7JI2oN4TUrQvgB+wzTPO23bCKt8=
golang.org/x/mobile v0.0.0-20221110043201-43a038452099/go.mod h1:aAjjkJNdrh3PMckS4B10TGS2nag27cbKR1y2BpUxsiY=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 h1:6zppjxzCulZykYSLyVDYbneBfbaBIQPYMevg0bEwv2s=
@ -108,7 +108,6 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm
golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/tools v0.1.8-0.20211022200916-316ba0b74098/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/tools v0.1.12 h1:VveCTK38A2rkS8ZqFY25HIDFscX5X9OoEhJd3quQmXU=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

1
src/admin/admin.go
View File

@ -327,6 +327,7 @@ func (a *AdminSocket) handleRequest(conn net.Conn) {
var buf json.RawMessage
var req AdminSocketRequest
var resp AdminSocketResponse
req.Arguments = []byte("{}")
if err := func() error {
if err = decoder.Decode(&buf); err != nil {
return fmt.Errorf("Failed to find request")

4
src/admin/getpeers.go
View File

@ -19,7 +19,7 @@ type PeerEntry struct {
IPAddress string `json:"address"`
PublicKey string `json:"key"`
Port uint64 `json:"port"`
Priority uint8 `json:"priority"`
Priority uint64 `json:"priority"`
Coords []uint64 `json:"coords"`
Remote string `json:"remote"`
RXBytes DataUnit `json:"bytes_recvd"`
@ -36,7 +36,7 @@ func (a *AdminSocket) getPeersHandler(req *GetPeersRequest, res *GetPeersRespons
IPAddress: net.IP(addr[:]).String(),
PublicKey: hex.EncodeToString(p.Key),
Port: p.Port,
Priority: p.Priority,
Priority: uint64(p.Priority), // can't be uint8 thanks to gobind
Coords: p.Coords,
Remote: p.Remote,
RXBytes: DataUnit(p.RXBytes),

2
src/config/config.go
View File

@ -44,7 +44,7 @@ type MulticastInterfaceConfig struct {
Beacon bool
Listen bool
Port uint16
Priority uint8
Priority uint64 // really uint8, but gobind won't export it
}
// NewSigningKeys replaces the signing keypair in the NodeConfig with a new

4
src/core/api.go
View File

@ -194,7 +194,7 @@ func (c *Core) AddPeer(uri string, sourceInterface string) error {
if err != nil {
return err
}
info, err := c.links.call(u, sourceInterface)
info, err := c.links.call(u, sourceInterface, nil)
if err != nil {
return err
}
@ -236,7 +236,7 @@ func (c *Core) RemovePeer(uri string, sourceInterface string) error {
// This does not add the peer to the peer list, so if the connection drops, the
// peer will not be called again automatically.
func (c *Core) CallPeer(u *url.URL, sintf string) error {
_, err := c.links.call(u, sintf)
_, err := c.links.call(u, sintf, nil)
return err
}

7
src/core/core.go
View File

@ -121,6 +121,13 @@ func (c *Core) _addPeerLoop() {
})
}
func (c *Core) RetryPeersNow() {
if c.addPeerTimer != nil && !c.addPeerTimer.Stop() {
<-c.addPeerTimer.C
}
c.Act(nil, c._addPeerLoop)
}
// Stop shuts down the Yggdrasil node.
func (c *Core) Stop() {
phony.Block(c, func() {

75
src/core/link.go
View File

@ -34,6 +34,11 @@ type linkInfo struct {
remote string // Remote name or address
}
type linkDial struct {
url *url.URL
sintf string
}
type link struct {
lname string
links *links
@ -105,9 +110,12 @@ func (l *links) isConnectedTo(info linkInfo) bool {
return isConnected
}
func (l *links) call(u *url.URL, sintf string) (linkInfo, error) {
info := linkInfoFor(u.Scheme, sintf, u.Host)
func (l *links) call(u *url.URL, sintf string, errch chan<- error) (info linkInfo, err error) {
info = linkInfoFor(u.Scheme, sintf, u.Host)
if l.isConnectedTo(info) {
if errch != nil {
close(errch) // already connected, no error
}
return info, nil
}
options := linkOptions{
@ -116,6 +124,9 @@ func (l *links) call(u *url.URL, sintf string) (linkInfo, error) {
for _, pubkey := range u.Query()["key"] {
sigPub, err := hex.DecodeString(pubkey)
if err != nil {
if errch != nil {
close(errch)
}
return info, fmt.Errorf("pinned key contains invalid hex characters")
}
var sigPubKey keyArray
@ -125,6 +136,9 @@ func (l *links) call(u *url.URL, sintf string) (linkInfo, error) {
if p := u.Query().Get("priority"); p != "" {
pi, err := strconv.ParseUint(p, 10, 8)
if err != nil {
if errch != nil {
close(errch)
}
return info, fmt.Errorf("priority invalid: %w", err)
}
options.priority = uint8(pi)
@ -132,15 +146,27 @@ func (l *links) call(u *url.URL, sintf string) (linkInfo, error) {
switch info.linkType {
case "tcp":
go func() {
if errch != nil {
defer close(errch)
}
if err := l.tcp.dial(u, options, sintf); err != nil && err != io.EOF {
l.core.log.Warnf("Failed to dial TCP %s: %s\n", u.Host, err)
if errch != nil {
errch <- err
}
}
}()
case "socks":
go func() {
if errch != nil {
defer close(errch)
}
if err := l.socks.dial(u, options); err != nil && err != io.EOF {
l.core.log.Warnf("Failed to dial SOCKS %s: %s\n", u.Host, err)
if errch != nil {
errch <- err
}
}
}()
@ -163,19 +189,34 @@ func (l *links) call(u *url.URL, sintf string) (linkInfo, error) {
}
}
go func() {
if errch != nil {
defer close(errch)
}
if err := l.tls.dial(u, options, sintf, tlsSNI); err != nil && err != io.EOF {
l.core.log.Warnf("Failed to dial TLS %s: %s\n", u.Host, err)
if errch != nil {
errch <- err
}
}
}()
case "unix":
go func() {
if errch != nil {
defer close(errch)
}
if err := l.unix.dial(u, options, sintf); err != nil && err != io.EOF {
l.core.log.Warnf("Failed to dial UNIX %s: %s\n", u.Host, err)
if errch != nil {
errch <- err
}
}
}()
default:
if errch != nil {
close(errch)
}
return info, errors.New("unknown call scheme: " + u.Scheme)
}
return info, nil
@ -197,7 +238,7 @@ func (l *links) listen(u *url.URL, sintf string) (*Listener, error) {
return listener, err
}
func (l *links) create(conn net.Conn, name string, info linkInfo, incoming, force bool, options linkOptions) error {
func (l *links) create(conn net.Conn, dial *linkDial, name string, info linkInfo, incoming, force bool, options linkOptions) error {
intf := link{
conn: &linkConn{
Conn: conn,
@ -211,14 +252,14 @@ func (l *links) create(conn net.Conn, name string, info linkInfo, incoming, forc
force: force,
}
go func() {
if err := intf.handler(); err != nil {
if err := intf.handler(dial); err != nil {
l.core.log.Errorf("Link handler %s error (%s): %s", name, conn.RemoteAddr(), err)
}
}()
return nil
}
func (intf *link) handler() error {
func (intf *link) handler(dial *linkDial) error {
defer intf.conn.Close() // nolint:errcheck
// Don't connect to this link more than once.
@ -321,6 +362,30 @@ func (intf *link) handler() error {
intf.links.core.log.Infof("Disconnected %s %s: %s, source %s; error: %s",
dir, strings.ToUpper(intf.info.linkType), remoteStr, localStr, err)
}
if !intf.incoming && dial != nil {
// The connection was one that we dialled, so wait a second and try to
// dial it again.
var retry func(attempt int)
retry = func(attempt int) {
// intf.links.core.log.Infof("Retrying %s (attempt %d of 5)...", dial.url.String(), attempt)
errch := make(chan error, 1)
if _, err := intf.links.call(dial.url, dial.sintf, errch); err != nil {
return
}
if err := <-errch; err != nil {
if attempt < 3 {
time.AfterFunc(time.Second, func() {
retry(attempt + 1)
})
}
}
}
time.AfterFunc(time.Second, func() {
retry(1)
})
}
return nil
}

10
src/core/link_socks.go
View File

@ -37,13 +37,17 @@ func (l *linkSOCKS) dial(url *url.URL, options linkOptions) error {
if err != nil {
return err
}
return l.handler(url.String(), info, conn, options, false)
dial := &linkDial{
url: url,
}
return l.handler(dial, info, conn, options, false)
}
func (l *linkSOCKS) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
func (l *linkSOCKS) handler(dial *linkDial, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
return l.links.create(
conn, // connection
name, // connection name
dial, // connection URL
dial.url.String(), // connection name
info, // connection info
incoming, // not incoming
false, // not forced

13
src/core/link_tcp.go
View File

@ -47,8 +47,12 @@ func (l *linkTCP) dial(url *url.URL, options linkOptions, sintf string) error {
if err != nil {
return err
}
uri := strings.TrimRight(strings.SplitN(url.String(), "?", 2)[0], "/")
return l.handler(uri, info, conn, options, false, false)
name := strings.TrimRight(strings.SplitN(url.String(), "?", 2)[0], "/")
dial := &linkDial{
url: url,
sintf: sintf,
}
return l.handler(dial, name, info, conn, options, false, false)
}
func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
@ -86,7 +90,7 @@ func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
raddr := conn.RemoteAddr().(*net.TCPAddr)
name := fmt.Sprintf("tcp://%s", raddr)
info := linkInfoFor("tcp", sintf, tcpIDFor(laddr, raddr))
if err = l.handler(name, info, conn, linkOptionsForListener(url), true, raddr.IP.IsLinkLocalUnicast()); err != nil {
if err = l.handler(nil, name, info, conn, linkOptionsForListener(url), true, raddr.IP.IsLinkLocalUnicast()); err != nil {
l.core.log.Errorln("Failed to create inbound link:", err)
}
}
@ -97,9 +101,10 @@ func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
return entry, nil
}
func (l *linkTCP) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
func (l *linkTCP) handler(dial *linkDial, name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
return l.links.create(
conn, // connection
dial, // connection URL
name, // connection name
info, // connection info
incoming, // not incoming

24
src/core/link_tls.go
View File

@ -69,8 +69,12 @@ func (l *linkTLS) dial(url *url.URL, options linkOptions, sintf, sni string) err
if err != nil {
return err
}
uri := strings.TrimRight(strings.SplitN(url.String(), "?", 2)[0], "/")
return l.handler(uri, info, conn, options, false, false)
name := strings.TrimRight(strings.SplitN(url.String(), "?", 2)[0], "/")
dial := &linkDial{
url: url,
sintf: sintf,
}
return l.handler(dial, name, info, conn, options, false, false)
}
func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
@ -109,7 +113,7 @@ func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
raddr := conn.RemoteAddr().(*net.TCPAddr)
name := fmt.Sprintf("tls://%s", raddr)
info := linkInfoFor("tls", sintf, tcpIDFor(laddr, raddr))
if err = l.handler(name, info, conn, linkOptionsForListener(url), true, raddr.IP.IsLinkLocalUnicast()); err != nil {
if err = l.handler(nil, name, info, conn, linkOptionsForListener(url), true, raddr.IP.IsLinkLocalUnicast()); err != nil {
l.core.log.Errorln("Failed to create inbound link:", err)
}
}
@ -120,20 +124,18 @@ func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
return entry, nil
}
// RFC5280 section 4.1.2.5
var notAfterNeverExpires = time.Date(9999, time.December, 31, 23, 59, 59, 0, time.UTC)
func (l *linkTLS) generateConfig() (*tls.Config, error) {
certBuf := &bytes.Buffer{}
// TODO: because NotAfter is finite, we should add some mechanism to
// regenerate the certificate and restart the listeners periodically
// for nodes with very high uptimes. Perhaps regenerate certs and restart
// listeners every few months or so.
cert := x509.Certificate{
SerialNumber: big.NewInt(1),
Subject: pkix.Name{
CommonName: hex.EncodeToString(l.links.core.public[:]),
},
NotBefore: time.Now(),
NotAfter: time.Now().Add(time.Hour * 24 * 365),
NotAfter: notAfterNeverExpires,
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
@ -167,6 +169,6 @@ func (l *linkTLS) generateConfig() (*tls.Config, error) {
}, nil
}
func (l *linkTLS) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
return l.tcp.handler(name, info, conn, options, incoming, force)
func (l *linkTLS) handler(dial *linkDial, name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
return l.tcp.handler(dial, name, info, conn, options, incoming, force)
}

10
src/core/link_unix.go
View File

@ -45,7 +45,10 @@ func (l *linkUNIX) dial(url *url.URL, options linkOptions, _ string) error {
if err != nil {
return err
}
return l.handler(url.String(), info, conn, options, false)
dial := &linkDial{
url: url,
}
return l.handler(dial, url.String(), info, conn, options, false)
}
func (l *linkUNIX) listen(url *url.URL, _ string) (*Listener, error) {
@ -74,7 +77,7 @@ func (l *linkUNIX) listen(url *url.URL, _ string) (*Listener, error) {
break
}
info := linkInfoFor("unix", "", url.String())
if err = l.handler(url.String(), info, conn, linkOptionsForListener(url), true); err != nil {
if err = l.handler(nil, url.String(), info, conn, linkOptionsForListener(url), true); err != nil {
l.core.log.Errorln("Failed to create inbound link:", err)
}
}
@ -85,9 +88,10 @@ func (l *linkUNIX) listen(url *url.URL, _ string) (*Listener, error) {
return entry, nil
}
func (l *linkUNIX) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
func (l *linkUNIX) handler(dial *linkDial, name string, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
return l.links.create(
conn, // connection
dial, // connection URL
name, // connection name
info, // connection info
incoming, // not incoming

12
src/multicast/multicast.go
View File

@ -30,6 +30,7 @@ type Multicast struct {
_isOpen bool
_listeners map[string]*listenerInfo
_interfaces map[string]*interfaceInfo
_timer *time.Timer
config struct {
_groupAddr GroupAddress
_interfaces map[MulticastInterface]struct{}
@ -207,6 +208,15 @@ func (m *Multicast) _getAllowedInterfaces() map[string]*interfaceInfo {
return interfaces
}
func (m *Multicast) AnnounceNow() {
phony.Block(m, func() {
if m._timer != nil && !m._timer.Stop() {
<-m._timer.C
}
m.Act(nil, m._announce)
})
}
func (m *Multicast) _announce() {
if !m._isOpen {
return
@ -329,7 +339,7 @@ func (m *Multicast) _announce() {
break
}
}
time.AfterFunc(time.Second, func() {
m._timer = time.AfterFunc(time.Second, func() {
m.Act(nil, m._announce)
})
}