cwinfo/yggdrasil-go
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fixes to linkInterface.handler()

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This commit is contained in:
Arceliar 2019-02-26 21:07:56 -06:00
parent def4fb3587
commit 2569242050
2 changed files with 28 additions and 3 deletions
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20
src/util/util.go
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@ -56,3 +56,23 @@ func TimerStop(t *time.Timer) bool {
} }
return true return true
} }
// Run a blocking function with a timeout.
// Returns true if the function returns.
// Returns false if the timer fires.
// The blocked function remains blocked--the caller is responsible for somehow killing it.
func FuncTimeout(f func(), timeout time.Duration) bool {
success := make(chan struct{})
go func() {
defer close(success)
f()
}()
timer := time.NewTimer(timeout)
defer TimerStop(timer)
select {
case <-success:
return true
case <-timer.C:
return false
}
}

11
src/yggdrasil/link.go
View File

@ -92,11 +92,16 @@ func (intf *linkInterface) handler() error {
meta.link = *myLinkPub meta.link = *myLinkPub
metaBytes := meta.encode() metaBytes := meta.encode()
// TODO timeouts on send/recv (goroutine for send/recv, channel select w/ timer) // TODO timeouts on send/recv (goroutine for send/recv, channel select w/ timer)
err := intf.msgIO._sendMetaBytes(metaBytes) var err error
if !util.FuncTimeout(func() { err = intf.msgIO._sendMetaBytes(metaBytes) }, 30*time.Second) {
return errors.New("timeout on metadata send")
}
if err != nil { if err != nil {
return err return err
} }
metaBytes, err = intf.msgIO._recvMetaBytes() if !util.FuncTimeout(func() { metaBytes, err = intf.msgIO._recvMetaBytes() }, 30*time.Second) {
return errors.New("timeout on metadata recv")
}
if err != nil { if err != nil {
return err return err
} }
@ -110,7 +115,7 @@ func (intf *linkInterface) handler() error {
return errors.New("failed to connect: wrong version") return errors.New("failed to connect: wrong version")
} }
// Check if we're authorized to connect to this key / IP // Check if we're authorized to connect to this key / IP
if !intf.force && !intf.link.core.peers.isAllowedEncryptionPublicKey(&meta.box) { if !intf.incoming && !intf.force && !intf.link.core.peers.isAllowedEncryptionPublicKey(&meta.box) {
intf.link.core.log.Debugf("%s connection to %s forbidden: AllowedEncryptionPublicKeys does not contain key %s", intf.link.core.log.Debugf("%s connection to %s forbidden: AllowedEncryptionPublicKeys does not contain key %s",
strings.ToUpper(intf.info.linkType), intf.info.remote, hex.EncodeToString(meta.box[:])) strings.ToUpper(intf.info.linkType), intf.info.remote, hex.EncodeToString(meta.box[:]))
intf.msgIO.close() intf.msgIO.close()