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Make sure we pick some link when Dialling

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This commit is contained in:
Milos Gajdos 2019-10-24 16:07:31 +01:00
parent 4db1e09798
commit 494eb13534
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GPG Key ID: 8B31058CC55DFD4F
1 changed files with 26 additions and 24 deletions
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12
tunnel/default.go
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@ -984,11 +984,10 @@ func (t *tun) Dial(channel string, opts ...DialOption) (Session, error) {
var measured bool
// non multicast so we need to find the link
if id := options.Link; id != "" {
t.RLock()
for _, link := range t.links {
// use the link specified it its available
if link.id != id {
if id := options.Link; len(id) > 0 && link.id != id {
continue
}
@ -1004,14 +1003,13 @@ func (t *tun) Dial(channel string, opts ...DialOption) (Session, error) {
}
t.RUnlock()
// link not found
if len(links) == 0 {
if len(links) == 0 && len(options.Link) > 0 {
// delete session and return error
t.delSession(c.channel, c.session)
log.Debugf("Tunnel deleting session %s %s: %v", c.session, c.channel, ErrLinkNotFound)
return nil, ErrLinkNotFound
}
}
// discovered so set the link if not multicast
// TODO: pick the link efficiently based
// on link status and saturation.
@ -1038,10 +1036,12 @@ func (t *tun) Dial(channel string, opts ...DialOption) (Session, error) {
select {
case <-time.After(after()):
t.delSession(c.channel, c.session)
log.Debugf("Tunnel deleting session %s %s: %v", c.session, c.channel, ErrDialTimeout)
return nil, ErrDialTimeout
case err := <-c.errChan:
if err != nil {
t.delSession(c.channel, c.session)
log.Debugf("Tunnel deleting session %s %s: %v", c.session, c.channel, err)
return nil, err
}
}
@ -1077,6 +1077,7 @@ func (t *tun) Dial(channel string, opts ...DialOption) (Session, error) {
// otherwise return an error
if err != nil {
t.delSession(c.channel, c.session)
log.Debugf("Tunnel deleting session %s %s: %v", c.session, c.channel, err)
return nil, err
}
@ -1109,6 +1110,7 @@ func (t *tun) Dial(channel string, opts ...DialOption) (Session, error) {
if err != nil {
// delete the session
t.delSession(c.channel, c.session)
log.Debugf("Tunnel deleting session %s %s: %v", c.session, c.channel, err)
return nil, err
}