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https://github.com/cwinfo/yggdrasil-go.git
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Signal when a session is closed, other tweaks
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parent
c593721362
commit
ade684beff
@ -10,7 +10,6 @@ import (
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"os/signal"
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"strings"
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"syscall"
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"time"
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"golang.org/x/text/encoding/unicode"
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@ -268,19 +267,6 @@ func main() {
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defer func() {
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n.core.Stop()
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}()
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// Some stuff
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go func() {
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time.Sleep(time.Second * 2)
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//session, err := n.core.Dial("nodeid", "babd4e4bccb216f77bb723c1b034b63a652060aabfe9506b51f687183e9b0fd13f438876f5a3ab21cac9c8101eb88e2613fe2a8b0724add09d7ef5a72146c31f")
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session, err := n.core.Dial("nodeid", "9890e135604e8aa6039a909e40c629824d852042a70e51957d5b9d700195663d50552e8e869af132b4617d76f8ef00314d94cce23aa8d6b051b3b952a32a4966")
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logger.Println(session, err)
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b := []byte{1, 2, 3, 4, 5}
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for {
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logger.Println(session.Write(b))
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logger.Println(session.Read(b))
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time.Sleep(time.Second)
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}
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}()
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// Make some nice output that tells us what our IPv6 address and subnet are.
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// This is just logged to stdout for the user.
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address := n.core.Address()
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@ -27,9 +27,6 @@ func (c *Conn) startSearch() {
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}
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if sinfo != nil {
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c.session = sinfo
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c.core.log.Println("Search from API succeeded")
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c.core.log.Println("Pubkey:", hex.EncodeToString(sinfo.theirPermPub[:]))
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c.core.log.Println("Coords:", sinfo.coords)
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}
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}
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doSearch := func() {
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@ -69,25 +66,32 @@ func (c *Conn) Read(b []byte) (int, error) {
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// To prevent blocking forever on a session that isn't initialised
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return 0, errors.New("session not initialised")
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}
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p := <-c.session.recv
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defer util.PutBytes(p.Payload)
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if !c.session.nonceIsOK(&p.Nonce) {
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return 0, errors.New("packet dropped due to invalid nonce")
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select {
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case p, ok := <-c.session.recv:
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if !ok {
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return 0, errors.New("session was closed")
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}
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defer util.PutBytes(p.Payload)
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if !c.session.nonceIsOK(&p.Nonce) {
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return 0, errors.New("packet dropped due to invalid nonce")
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}
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bs, isOK := crypto.BoxOpen(&c.session.sharedSesKey, p.Payload, &p.Nonce)
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if !isOK {
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util.PutBytes(bs)
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return 0, errors.New("packet dropped due to decryption failure")
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}
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b = b[:0]
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b = append(b, bs...)
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c.session.updateNonce(&p.Nonce)
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c.session.time = time.Now()
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c.session.bytesRecvd += uint64(len(bs))
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return len(b), nil
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case <-c.session.closed:
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return len(b), errors.New("session was closed")
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}
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bs, isOK := crypto.BoxOpen(&c.session.sharedSesKey, p.Payload, &p.Nonce)
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if !isOK {
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util.PutBytes(bs)
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return 0, errors.New("packet dropped due to decryption failure")
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}
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b = b[:0]
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b = append(b, bs...)
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c.session.updateNonce(&p.Nonce)
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c.session.time = time.Now()
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c.session.bytesRecvd += uint64(len(bs))
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return len(b), nil
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}
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func (c *Conn) Write(b []byte) (int, error) {
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func (c *Conn) Write(b []byte) (bytesWritten int, err error) {
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if c.session == nil {
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c.core.router.doAdmin(func() {
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c.startSearch()
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@ -112,7 +116,11 @@ func (c *Conn) Write(b []byte) (int, error) {
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}
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packet := p.encode()
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c.session.bytesSent += uint64(len(b))
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c.session.send <- packet
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select {
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case c.session.send <- packet:
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case <-c.session.closed:
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return len(b), errors.New("session was closed")
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}
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c.session.core.router.out(packet)
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return len(b), nil
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}
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@ -41,6 +41,7 @@ type sessionInfo struct {
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init bool // Reset if coords change
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send chan []byte
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recv chan *wire_trafficPacket
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closed chan interface{}
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nonceMask uint64
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tstamp int64 // tstamp from their last session ping, replay attack mitigation
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tstampMutex int64 // protects the above
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@ -306,6 +307,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
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sinfo.theirSubnet = *address.SubnetForNodeID(crypto.GetNodeID(&sinfo.theirPermPub))
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sinfo.send = make(chan []byte, 32)
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sinfo.recv = make(chan *wire_trafficPacket, 32)
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sinfo.closed = make(chan interface{})
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ss.sinfos[sinfo.myHandle] = &sinfo
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ss.byMySes[sinfo.mySesPub] = &sinfo.myHandle
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ss.byTheirPerm[sinfo.theirPermPub] = &sinfo.myHandle
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@ -364,6 +366,8 @@ func (ss *sessions) cleanup() {
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// Closes a session, removing it from sessions maps and killing the worker goroutine.
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func (sinfo *sessionInfo) close() {
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sinfo.init = false
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close(sinfo.closed)
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delete(sinfo.core.sessions.sinfos, sinfo.myHandle)
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delete(sinfo.core.sessions.byMySes, sinfo.mySesPub)
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delete(sinfo.core.sessions.byTheirPerm, sinfo.theirPermPub)
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