yggdrasil-network/yggdrasil-go
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Add API functions for manipulating maximum session MTU, fix TUN/TAP to use that

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This commit is contained in:
Neil Alexander 2019-11-21 00:02:39 +00:00
parent 789307d52b
commit e90be6f569
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GPG key ID: A02A2019A2BB0944
3 changed files with 24 additions and 3 deletions
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16
src/yggdrasil/api.go
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@ -363,6 +363,22 @@ func (c *Core) SetNodeInfo(nodeinfo interface{}, nodeinfoprivacy bool) {
c.router.nodeinfo.setNodeInfo(nodeinfo, nodeinfoprivacy)
}
// GetMaximumSessionMTU returns the maximum allowed session MTU size.
func (c *Core) GetMaximumSessionMTU(mtu uint16) uint16 {
return c.router.sessions.myMaximumMTU
}
// SetMaximumSessionMTU sets the maximum allowed session MTU size. The return
// value contains the actual set value, since Yggdrasil will not accept MTUs
// below 1280 bytes. The default value is 65535 bytes.
func (c *Core) SetMaximumSessionMTU(mtu uint16) uint16 {
if mtu < 1280 {
mtu = 1280
}
c.router.sessions.myMaximumMTU = mtu
return mtu
}
// GetNodeInfo requests nodeinfo from a remote node, as specified by the public
// key and coordinates specified. The third parameter specifies whether a cached
// result is acceptable - this results in less traffic being generated than is

8
src/yggdrasil/session.go
View file

@ -121,6 +121,7 @@ type sessions struct {
lastCleanup time.Time
isAllowedHandler func(pubkey *crypto.BoxPubKey, initiator bool) bool // Returns true or false if session setup is allowed
isAllowedMutex sync.RWMutex // Protects the above
myMaximumMTU uint16 // Maximum allowed session MTU
permShared map[crypto.BoxPubKey]*crypto.BoxSharedKey // Maps known permanent keys to their shared key, used by DHT a lot
sinfos map[crypto.Handle]*sessionInfo // Maps handle onto session info
byTheirPerm map[crypto.BoxPubKey]*crypto.Handle // Maps theirPermPub onto handle
@ -133,6 +134,7 @@ func (ss *sessions) init(r *router) {
ss.sinfos = make(map[crypto.Handle]*sessionInfo)
ss.byTheirPerm = make(map[crypto.BoxPubKey]*crypto.Handle)
ss.lastCleanup = time.Now()
ss.myMaximumMTU = 65535
}
func (ss *sessions) reconfigure() {
@ -187,9 +189,9 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
sinfo.mySesPriv = *priv
sinfo.myNonce = *crypto.NewBoxNonce()
sinfo.theirMTU = 1280
ss.router.core.config.Mutex.RLock()
sinfo.myMTU = uint16(ss.router.core.config.Current.IfMTU)
ss.router.core.config.Mutex.RUnlock()
// TODO: sinfo.myMTU becomes unnecessary if we always have a reference to the
// sessions struct so let's check if that is the case
sinfo.myMTU = ss.myMaximumMTU
now := time.Now()
sinfo.timeOpened = now
sinfo.time = now