yggdrasil-network/yggdrasil-go
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work-in-progress on more cleanup

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This commit is contained in:
Arceliar 2020-05-23 10:23:55 -05:00
parent 59c5644a52
commit ef1e506a0c
9 changed files with 74 additions and 74 deletions
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6
src/yggdrasil/api.go
View file

@ -257,14 +257,14 @@ func (c *Core) ConnDialer() (*Dialer, error) {
// "Listen" configuration item, e.g.
// tcp://a.b.c.d:e
func (c *Core) ListenTCP(uri string) (*TcpListener, error) {
return c.link.tcp.listen(uri, nil)
return c.links.tcp.listen(uri, nil)
}
// ListenTLS starts a new TLS listener. The input URI should match that of the
// "Listen" configuration item, e.g.
// tls://a.b.c.d:e
func (c *Core) ListenTLS(uri string) (*TcpListener, error) {
return c.link.tcp.listen(uri, c.link.tcp.tls.forListener)
return c.links.tcp.listen(uri, c.links.tcp.tls.forListener)
}
// NodeID gets the node ID. This is derived from your router encryption keys.
@ -463,7 +463,7 @@ func (c *Core) RemovePeer(addr string, sintf 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(addr string, sintf string) error {
return c.link.call(addr, sintf)
return c.links.call(addr, sintf)
}
// DisconnectPeer disconnects a peer once. This should be specified as a port

6
src/yggdrasil/core.go
View file

@ -29,7 +29,7 @@ type Core struct {
switchTable switchTable
peers peers
router router
link link
links links
log *log.Logger
addPeerTimer *time.Timer
}
@ -165,7 +165,7 @@ func (c *Core) _start(nc *config.NodeConfig, log *log.Logger) (*config.NodeState
return nil, err
}
if err := c.link.init(c); err != nil {
if err := c.links.init(c); err != nil {
c.log.Errorln("Failed to start link interfaces")
return nil, err
}
@ -197,7 +197,7 @@ func (c *Core) _stop() {
if c.addPeerTimer != nil {
c.addPeerTimer.Stop()
}
c.link.stop()
c.links.stop()
/* FIXME this deadlocks, need a waitgroup or something to coordinate shutdown
for _, peer := range c.GetPeers() {
c.DisconnectPeer(peer.Port)

70
src/yggdrasil/link.go
View file

@ -20,7 +20,7 @@ import (
"github.com/Arceliar/phony"
)
type link struct {
type links struct {
core *Core
mutex sync.RWMutex // protects interfaces below
interfaces map[linkInfo]*linkInterface
@ -37,7 +37,7 @@ type linkInfo struct {
remote string // Remote name or address
}
type linkInterfaceMsgIO interface {
type linkMsgIO interface {
readMsg() ([]byte, error)
writeMsgs([][]byte) (int, error)
close() error
@ -48,9 +48,9 @@ type linkInterfaceMsgIO interface {
type linkInterface struct {
lname string
link *link
links *links
peer *peer
msgIO linkInterfaceMsgIO
msgIO linkMsgIO
info linkInfo
incoming bool
force bool
@ -66,7 +66,7 @@ type linkInterface struct {
blocked bool // True if we've blocked the peer in the switch
}
func (l *link) init(c *Core) error {
func (l *links) init(c *Core) error {
l.core = c
l.mutex.Lock()
l.interfaces = make(map[linkInfo]*linkInterface)
@ -81,11 +81,11 @@ func (l *link) init(c *Core) error {
return nil
}
func (l *link) reconfigure() {
func (l *links) reconfigure() {
l.tcp.reconfigure()
}
func (l *link) call(uri string, sintf string) error {
func (l *links) call(uri string, sintf string) error {
u, err := url.Parse(uri)
if err != nil {
return fmt.Errorf("peer %s is not correctly formatted (%s)", uri, err)
@ -104,7 +104,7 @@ func (l *link) call(uri string, sintf string) error {
return nil
}
func (l *link) listen(uri string) error {
func (l *links) listen(uri string) error {
u, err := url.Parse(uri)
if err != nil {
return fmt.Errorf("listener %s is not correctly formatted (%s)", uri, err)
@ -121,11 +121,11 @@ func (l *link) listen(uri string) error {
}
}
func (l *link) create(msgIO linkInterfaceMsgIO, name, linkType, local, remote string, incoming, force bool) (*linkInterface, error) {
func (l *links) create(msgIO linkMsgIO, name, linkType, local, remote string, incoming, force bool) (*linkInterface, error) {
// Technically anything unique would work for names, but let's pick something human readable, just for debugging
intf := linkInterface{
lname: name,
link: l,
links: l,
msgIO: msgIO,
info: linkInfo{
linkType: linkType,
@ -142,7 +142,7 @@ func (l *link) create(msgIO linkInterfaceMsgIO, name, linkType, local, remote st
return &intf, nil
}
func (l *link) stop() error {
func (l *links) stop() error {
close(l.stopped)
if err := l.tcp.stop(); err != nil {
return err
@ -163,8 +163,8 @@ func (intf *linkInterface) handler() error {
})
myLinkPub, myLinkPriv := crypto.NewBoxKeys()
meta := version_getBaseMetadata()
meta.box = intf.link.core.boxPub
meta.sig = intf.link.core.sigPub
meta.box = intf.links.core.boxPub
meta.sig = intf.links.core.sigPub
meta.link = *myLinkPub
metaBytes := meta.encode()
// TODO timeouts on send/recv (goroutine for send/recv, channel select w/ timer)
@ -187,12 +187,12 @@ func (intf *linkInterface) handler() error {
}
base := version_getBaseMetadata()
if meta.ver > base.ver || meta.ver == base.ver && meta.minorVer > base.minorVer {
intf.link.core.log.Errorln("Failed to connect to node: " + intf.lname + " version: " + fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
intf.links.core.log.Errorln("Failed to connect to node: " + intf.lname + " version: " + fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
return errors.New("failed to connect: wrong version")
}
// Check if we're authorized to connect to this key / IP
if intf.incoming && !intf.force && !intf.link.core.peers.isAllowedEncryptionPublicKey(&meta.box) {
intf.link.core.log.Warnf("%s connection from %s forbidden: AllowedEncryptionPublicKeys does not contain key %s",
if intf.incoming && !intf.force && !intf.links.core.peers.isAllowedEncryptionPublicKey(&meta.box) {
intf.links.core.log.Warnf("%s connection from %s forbidden: AllowedEncryptionPublicKeys does not contain key %s",
strings.ToUpper(intf.info.linkType), intf.info.remote, hex.EncodeToString(meta.box[:]))
intf.msgIO.close()
return nil
@ -200,12 +200,12 @@ func (intf *linkInterface) handler() error {
// Check if we already have a link to this node
intf.info.box = meta.box
intf.info.sig = meta.sig
intf.link.mutex.Lock()
if oldIntf, isIn := intf.link.interfaces[intf.info]; isIn {
intf.link.mutex.Unlock()
intf.links.mutex.Lock()
if oldIntf, isIn := intf.links.interfaces[intf.info]; isIn {
intf.links.mutex.Unlock()
// FIXME we should really return an error and let the caller block instead
// That lets them do things like close connections on its own, avoid printing a connection message in the first place, etc.
intf.link.core.log.Debugln("DEBUG: found existing interface for", intf.name)
intf.links.core.log.Debugln("DEBUG: found existing interface for", intf.name)
intf.msgIO.close()
if !intf.incoming {
// Block outgoing connection attempts until the existing connection closes
@ -214,21 +214,21 @@ func (intf *linkInterface) handler() error {
return nil
} else {
intf.closed = make(chan struct{})
intf.link.interfaces[intf.info] = intf
intf.links.interfaces[intf.info] = intf
defer func() {
intf.link.mutex.Lock()
delete(intf.link.interfaces, intf.info)
intf.link.mutex.Unlock()
intf.links.mutex.Lock()
delete(intf.links.interfaces, intf.info)
intf.links.mutex.Unlock()
close(intf.closed)
}()
intf.link.core.log.Debugln("DEBUG: registered interface for", intf.name)
intf.links.core.log.Debugln("DEBUG: registered interface for", intf.name)
}
intf.link.mutex.Unlock()
intf.links.mutex.Unlock()
// Create peer
shared := crypto.GetSharedKey(myLinkPriv, &meta.link)
phony.Block(&intf.link.core.peers, func() {
phony.Block(&intf.links.core.peers, func() {
// FIXME don't use phony.Block, it's bad practice, even if it's safe here
intf.peer = intf.link.core.peers._newPeer(&meta.box, &meta.sig, shared, intf)
intf.peer = intf.links.core.peers._newPeer(&meta.box, &meta.sig, shared, intf)
})
if intf.peer == nil {
return errors.New("failed to create peer")
@ -240,7 +240,7 @@ func (intf *linkInterface) handler() error {
themAddr := address.AddrForNodeID(crypto.GetNodeID(&intf.info.box))
themAddrString := net.IP(themAddr[:]).String()
themString := fmt.Sprintf("%s@%s", themAddrString, intf.info.remote)
intf.link.core.log.Infof("Connected %s: %s, source %s",
intf.links.core.log.Infof("Connected %s: %s, source %s",
strings.ToUpper(intf.info.linkType), themString, intf.info.local)
// Start things
go intf.peer.start()
@ -252,7 +252,7 @@ func (intf *linkInterface) handler() error {
defer close(done)
go func() {
select {
case <-intf.link.stopped:
case <-intf.links.stopped:
intf.msgIO.close()
case <-done:
}
@ -260,10 +260,10 @@ func (intf *linkInterface) handler() error {
err = <-intf.reader.err
// TODO don't report an error if it's just a 'use of closed network connection'
if err != nil {
intf.link.core.log.Infof("Disconnected %s: %s, source %s; error: %s",
intf.links.core.log.Infof("Disconnected %s: %s, source %s; error: %s",
strings.ToUpper(intf.info.linkType), themString, intf.info.local, err)
} else {
intf.link.core.log.Infof("Disconnected %s: %s, source %s",
intf.links.core.log.Infof("Disconnected %s: %s, source %s",
strings.ToUpper(intf.info.linkType), themString, intf.info.local)
}
return err
@ -355,7 +355,7 @@ func (intf *linkInterface) notifyBlockedSend() {
if intf.sendTimer != nil && !intf.blocked {
//As far as we know, we're still trying to send, and the timer fired.
intf.blocked = true
intf.link.core.switchTable.blockPeer(intf, intf.peer.port)
intf.links.core.switchTable.blockPeer(intf, intf.peer.port)
}
})
}
@ -392,7 +392,7 @@ func (intf *linkInterface) notifyStalled() {
intf.stallTimer.Stop()
intf.stallTimer = nil
intf.blocked = true
intf.link.core.switchTable.blockPeer(intf, intf.peer.port)
intf.links.core.switchTable.blockPeer(intf, intf.peer.port)
}
})
}
@ -419,7 +419,7 @@ func (intf *linkInterface) notifyRead(size int) {
}
if intf.blocked {
intf.blocked = false
intf.link.core.switchTable.unblockPeer(intf, intf.peer.port)
intf.links.core.switchTable.unblockPeer(intf, intf.peer.port)
}
})
}

2
src/yggdrasil/simlink.go
View file

@ -58,7 +58,7 @@ func (c *Core) NewSimlink() *Simlink {
s := &Simlink{rch: make(chan []byte, 1)}
n := "Simlink"
var err error
s.link, err = c.link.create(s, n, n, n, n, false, true)
s.link, err = c.links.create(s, n, n, n, n, false, true)
if err != nil {
panic(err)
}

2
src/yggdrasil/stream.go
View file

@ -9,7 +9,7 @@ import (
)
// Test that this matches the interface we expect
var _ = linkInterfaceMsgIO(&stream{})
var _ = linkMsgIO(&stream{})
type stream struct {
rwc io.ReadWriteCloser

2
src/yggdrasil/switch.go
View file

@ -188,7 +188,7 @@ func (t *switchTable) init(core *Core) {
func (t *switchTable) reconfigure() {
// This is where reconfiguration would go, if we had anything useful to do.
t.core.link.reconfigure()
t.core.links.reconfigure()
t.core.peers.reconfigure()
}

50
src/yggdrasil/tcp.go
View file

@ -33,7 +33,7 @@ const tcp_ping_interval = (default_timeout * 2 / 3)
// The TCP listener and information about active TCP connections, to avoid duplication.
type tcp struct {
link *link
links *links
waitgroup sync.WaitGroup
mutex sync.Mutex // Protecting the below
listeners map[string]*TcpListener
@ -86,8 +86,8 @@ func (t *tcp) getAddr() *net.TCPAddr {
}
// Initializes the struct.
func (t *tcp) init(l *link) error {
t.link = l
func (t *tcp) init(l *links) error {
t.links = l
t.tls.init(t)
t.mutex.Lock()
t.calls = make(map[string]struct{})
@ -95,9 +95,9 @@ func (t *tcp) init(l *link) error {
t.listeners = make(map[string]*TcpListener)
t.mutex.Unlock()
t.link.core.config.Mutex.RLock()
defer t.link.core.config.Mutex.RUnlock()
for _, listenaddr := range t.link.core.config.Current.Listen {
t.links.core.config.Mutex.RLock()
defer t.links.core.config.Mutex.RUnlock()
for _, listenaddr := range t.links.core.config.Current.Listen {
switch listenaddr[:6] {
case "tcp://":
if _, err := t.listen(listenaddr[6:], nil); err != nil {
@ -108,7 +108,7 @@ func (t *tcp) init(l *link) error {
return err
}
default:
t.link.core.log.Errorln("Failed to add listener: listener", listenaddr, "is not correctly formatted, ignoring")
t.links.core.log.Errorln("Failed to add listener: listener", listenaddr, "is not correctly formatted, ignoring")
}
}
@ -126,35 +126,35 @@ func (t *tcp) stop() error {
}
func (t *tcp) reconfigure() {
t.link.core.config.Mutex.RLock()
added := util.Difference(t.link.core.config.Current.Listen, t.link.core.config.Previous.Listen)
deleted := util.Difference(t.link.core.config.Previous.Listen, t.link.core.config.Current.Listen)
t.link.core.config.Mutex.RUnlock()
t.links.core.config.Mutex.RLock()
added := util.Difference(t.links.core.config.Current.Listen, t.links.core.config.Previous.Listen)
deleted := util.Difference(t.links.core.config.Previous.Listen, t.links.core.config.Current.Listen)
t.links.core.config.Mutex.RUnlock()
if len(added) > 0 || len(deleted) > 0 {
for _, a := range added {
switch a[:6] {
case "tcp://":
if _, err := t.listen(a[6:], nil); err != nil {
t.link.core.log.Errorln("Error adding TCP", a[6:], "listener:", err)
t.links.core.log.Errorln("Error adding TCP", a[6:], "listener:", err)
}
case "tls://":
if _, err := t.listen(a[6:], t.tls.forListener); err != nil {
t.link.core.log.Errorln("Error adding TLS", a[6:], "listener:", err)
t.links.core.log.Errorln("Error adding TLS", a[6:], "listener:", err)
}
default:
t.link.core.log.Errorln("Failed to add listener: listener", a, "is not correctly formatted, ignoring")
t.links.core.log.Errorln("Failed to add listener: listener", a, "is not correctly formatted, ignoring")
}
}
for _, d := range deleted {
if d[:6] != "tcp://" && d[:6] != "tls://" {
t.link.core.log.Errorln("Failed to delete listener: listener", d, "is not correctly formatted, ignoring")
t.links.core.log.Errorln("Failed to delete listener: listener", d, "is not correctly formatted, ignoring")
continue
}
t.mutex.Lock()
if listener, ok := t.listeners[d[6:]]; ok {
t.mutex.Unlock()
listener.Stop()
t.link.core.log.Infoln("Stopped TCP listener:", d[6:])
t.links.core.log.Infoln("Stopped TCP listener:", d[6:])
} else {
t.mutex.Unlock()
}
@ -202,13 +202,13 @@ func (t *tcp) listener(l *TcpListener, listenaddr string) {
}
// And here we go!
defer func() {
t.link.core.log.Infoln("Stopping TCP listener on:", l.Listener.Addr().String())
t.links.core.log.Infoln("Stopping TCP listener on:", l.Listener.Addr().String())
l.Listener.Close()
t.mutex.Lock()
delete(t.listeners, listenaddr)
t.mutex.Unlock()
}()
t.link.core.log.Infoln("Listening for TCP on:", l.Listener.Addr().String())
t.links.core.log.Infoln("Listening for TCP on:", l.Listener.Addr().String())
go func() {
<-l.stop
l.Listener.Close()
@ -217,7 +217,7 @@ func (t *tcp) listener(l *TcpListener, listenaddr string) {
for {
sock, err := l.Listener.Accept()
if err != nil {
t.link.core.log.Errorln("Failed to accept connection:", err)
t.links.core.log.Errorln("Failed to accept connection:", err)
return
}
t.waitgroup.Add(1)
@ -344,7 +344,7 @@ func (t *tcp) call(saddr string, options interface{}, sintf string, upgrade *Tcp
}
conn, err = dialer.Dial("tcp", dst.String())
if err != nil {
t.link.core.log.Debugf("Failed to dial %s: %s", callproto, err)
t.links.core.log.Debugf("Failed to dial %s: %s", callproto, err)
return
}
t.waitgroup.Add(1)
@ -361,7 +361,7 @@ func (t *tcp) handler(sock net.Conn, incoming bool, options interface{}, upgrade
if upgrade != nil {
var err error
if sock, err = upgrade.upgrade(sock); err != nil {
t.link.core.log.Errorln("TCP handler upgrade failed:", err)
t.links.core.log.Errorln("TCP handler upgrade failed:", err)
return
} else {
upgraded = true
@ -387,12 +387,12 @@ func (t *tcp) handler(sock net.Conn, incoming bool, options interface{}, upgrade
remote, _, _ = net.SplitHostPort(sock.RemoteAddr().String())
}
force := net.ParseIP(strings.Split(remote, "%")[0]).IsLinkLocalUnicast()
link, err := t.link.core.link.create(&stream, name, proto, local, remote, incoming, force)
link, err := t.links.create(&stream, name, proto, local, remote, incoming, force)
if err != nil {
t.link.core.log.Println(err)
t.links.core.log.Println(err)
panic(err)
}
t.link.core.log.Debugln("DEBUG: starting handler for", name)
t.links.core.log.Debugln("DEBUG: starting handler for", name)
err = link.handler()
t.link.core.log.Debugln("DEBUG: stopped handler for", name, err)
t.links.core.log.Debugln("DEBUG: stopped handler for", name, err)
}

6
src/yggdrasil/tcp_linux.go
View file

@ -20,10 +20,10 @@ func (t *tcp) tcpContext(network, address string, c syscall.RawConn) error {
// Log any errors
if bbr != nil {
t.link.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, SetsockoptString error:", bbr)
t.links.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, SetsockoptString error:", bbr)
}
if control != nil {
t.link.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, Control error:", control)
t.links.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, Control error:", control)
}
// Return nil because errors here are not considered fatal for the connection, it just means congestion control is suboptimal
@ -38,7 +38,7 @@ func (t *tcp) getControl(sintf string) func(string, string, syscall.RawConn) err
}
c.Control(btd)
if err != nil {
t.link.core.log.Debugln("Failed to set SO_BINDTODEVICE:", sintf)
t.links.core.log.Debugln("Failed to set SO_BINDTODEVICE:", sintf)
}
return t.tcpContext(network, address, c)
}

4
src/yggdrasil/tls.go
View file

@ -34,7 +34,7 @@ func (t *tcptls) init(tcp *tcp) {
}
edpriv := make(ed25519.PrivateKey, ed25519.PrivateKeySize)
copy(edpriv[:], tcp.link.core.sigPriv[:])
copy(edpriv[:], tcp.links.core.sigPriv[:])
certBuf := &bytes.Buffer{}
@ -42,7 +42,7 @@ func (t *tcptls) init(tcp *tcp) {
pubtemp := x509.Certificate{
SerialNumber: big.NewInt(1),
Subject: pkix.Name{
CommonName: hex.EncodeToString(tcp.link.core.sigPub[:]),
CommonName: hex.EncodeToString(tcp.links.core.sigPub[:]),
},
NotBefore: time.Now(),
NotAfter: time.Now().Add(time.Hour * 24 * 365),