cwinfo/yggdrasil-go
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Merge pull request #566 from Arceliar/ckr

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CKR deadlock fix
This commit is contained in:
Neil Alexander 2019-10-05 10:24:44 +01:00 committed by GitHub
commit b455c225fc
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2 changed files with 8 additions and 12 deletions
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2
src/tuntap/conn.go
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@ -31,7 +31,7 @@ func (s *tunConn) close() {
} }
func (s *tunConn) _close_from_tun() { func (s *tunConn) _close_from_tun() {
s.conn.Close() go s.conn.Close() // Just in case it blocks on actor operations
delete(s.tun.addrToConn, s.addr) delete(s.tun.addrToConn, s.addr)
delete(s.tun.subnetToConn, s.snet) delete(s.tun.subnetToConn, s.snet)
func() { func() {

18
src/yggdrasil/conn.go
View File

@ -96,7 +96,7 @@ func (c *Conn) setMTU(from phony.Actor, mtu uint16) {
c.Act(from, func() { c.mtu = mtu }) c.Act(from, func() { c.mtu = mtu })
} }
// This should never be called from the router goroutine, used in the dial functions // This should never be called from an actor, used in the dial functions
func (c *Conn) search() error { func (c *Conn) search() error {
var err error var err error
done := make(chan struct{}) done := make(chan struct{})
@ -118,6 +118,10 @@ func (c *Conn) search() error {
sinfo.setConn(nil, c) sinfo.setConn(nil, c)
} }
c.session = sinfo c.session = sinfo
c.nodeID = crypto.GetNodeID(&c.session.theirPermPub)
for i := range c.nodeMask {
c.nodeMask[i] = 0xFF
}
err = e err = e
close(done) close(done)
} }
@ -133,12 +137,6 @@ func (c *Conn) search() error {
if c.session == nil && err == nil { if c.session == nil && err == nil {
panic("search failed but returned no error") panic("search failed but returned no error")
} }
if c.session != nil {
c.nodeID = crypto.GetNodeID(&c.session.theirPermPub)
for i := range c.nodeMask {
c.nodeMask[i] = 0xFF
}
}
return err return err
} }
@ -353,10 +351,8 @@ func (c *Conn) LocalAddr() crypto.NodeID {
// RemoteAddr returns the complete node ID of the remote side of the connection. // RemoteAddr returns the complete node ID of the remote side of the connection.
func (c *Conn) RemoteAddr() crypto.NodeID { func (c *Conn) RemoteAddr() crypto.NodeID {
// TODO warn that this can block while waiting for the Conn actor to run, so don't call it from other actors... // RemoteAddr is set during the dial or accept, and isn't changed, so it's safe to access directly
var n crypto.NodeID return *c.nodeID
phony.Block(c, func() { n = *c.nodeID })
return n
} }
// SetDeadline is equivalent to calling both SetReadDeadline and // SetDeadline is equivalent to calling both SetReadDeadline and