cwinfo/yggdrasil-go
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clean up unused old session maps

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This commit is contained in:
Arceliar 2019-06-28 19:21:44 -05:00
parent c808be514f
commit e7cb76cea3
1 changed files with 1 additions and 59 deletions
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60
src/yggdrasil/session.go
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@ -118,12 +118,8 @@ type sessions struct {
isAllowedHandler func(pubkey *crypto.BoxPubKey, initiator bool) bool // Returns true or false if session setup is allowed
isAllowedMutex sync.RWMutex // Protects the above
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 (secret) handle onto session info
conns map[crypto.Handle]*Conn // Maps (secret) handle onto connections
byMySes map[crypto.BoxPubKey]*crypto.Handle // Maps mySesPub onto handle
sinfos map[crypto.Handle]*sessionInfo // Maps handle onto session info
byTheirPerm map[crypto.BoxPubKey]*crypto.Handle // Maps theirPermPub onto handle
addrToPerm map[address.Address]*crypto.BoxPubKey
subnetToPerm map[address.Subnet]*crypto.BoxPubKey
}
// Initializes the session struct.
@ -149,10 +145,7 @@ func (ss *sessions) init(core *Core) {
}()
ss.permShared = make(map[crypto.BoxPubKey]*crypto.BoxSharedKey)
ss.sinfos = make(map[crypto.Handle]*sessionInfo)
ss.byMySes = make(map[crypto.BoxPubKey]*crypto.Handle)
ss.byTheirPerm = make(map[crypto.BoxPubKey]*crypto.Handle)
ss.addrToPerm = make(map[address.Address]*crypto.BoxPubKey)
ss.subnetToPerm = make(map[address.Subnet]*crypto.BoxPubKey)
ss.lastCleanup = time.Now()
}
@ -175,16 +168,6 @@ func (ss *sessions) getSessionForHandle(handle *crypto.Handle) (*sessionInfo, bo
return sinfo, isIn
}
// Gets a session corresponding to an ephemeral session key used by this node.
func (ss *sessions) getByMySes(key *crypto.BoxPubKey) (*sessionInfo, bool) {
h, isIn := ss.byMySes[*key]
if !isIn {
return nil, false
}
sinfo, isIn := ss.getSessionForHandle(h)
return sinfo, isIn
}
// Gets a session corresponding to a permanent key used by the remote node.
func (ss *sessions) getByTheirPerm(key *crypto.BoxPubKey) (*sessionInfo, bool) {
h, isIn := ss.byTheirPerm[*key]
@ -195,26 +178,6 @@ func (ss *sessions) getByTheirPerm(key *crypto.BoxPubKey) (*sessionInfo, bool) {
return sinfo, isIn
}
// Gets a session corresponding to an IPv6 address used by the remote node.
func (ss *sessions) getByTheirAddr(addr *address.Address) (*sessionInfo, bool) {
p, isIn := ss.addrToPerm[*addr]
if !isIn {
return nil, false
}
sinfo, isIn := ss.getByTheirPerm(p)
return sinfo, isIn
}
// Gets a session corresponding to an IPv6 /64 subnet used by the remote node/network.
func (ss *sessions) getByTheirSubnet(snet *address.Subnet) (*sessionInfo, bool) {
p, isIn := ss.subnetToPerm[*snet]
if !isIn {
return nil, false
}
sinfo, isIn := ss.getByTheirPerm(p)
return sinfo, isIn
}
// Creates a new session and lazily cleans up old existing sessions. This
// includse initializing session info to sane defaults (e.g. lowest supported
// MTU).
@ -263,10 +226,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
sinfo.worker = make(chan func(), 1)
sinfo.recv = make(chan *wire_trafficPacket, 32)
ss.sinfos[sinfo.myHandle] = &sinfo
ss.byMySes[sinfo.mySesPub] = &sinfo.myHandle
ss.byTheirPerm[sinfo.theirPermPub] = &sinfo.myHandle
ss.addrToPerm[sinfo.theirAddr] = &sinfo.theirPermPub
ss.subnetToPerm[sinfo.theirSubnet] = &sinfo.theirPermPub
go sinfo.workerMain()
return &sinfo
}
@ -291,36 +251,18 @@ func (ss *sessions) cleanup() {
sinfos[k] = v
}
ss.sinfos = sinfos
byMySes := make(map[crypto.BoxPubKey]*crypto.Handle, len(ss.byMySes))
for k, v := range ss.byMySes {
byMySes[k] = v
}
ss.byMySes = byMySes
byTheirPerm := make(map[crypto.BoxPubKey]*crypto.Handle, len(ss.byTheirPerm))
for k, v := range ss.byTheirPerm {
byTheirPerm[k] = v
}
ss.byTheirPerm = byTheirPerm
addrToPerm := make(map[address.Address]*crypto.BoxPubKey, len(ss.addrToPerm))
for k, v := range ss.addrToPerm {
addrToPerm[k] = v
}
ss.addrToPerm = addrToPerm
subnetToPerm := make(map[address.Subnet]*crypto.BoxPubKey, len(ss.subnetToPerm))
for k, v := range ss.subnetToPerm {
subnetToPerm[k] = v
}
ss.subnetToPerm = subnetToPerm
ss.lastCleanup = time.Now()
}
// Closes a session, removing it from sessions maps and killing the worker goroutine.
func (sinfo *sessionInfo) close() {
delete(sinfo.core.sessions.sinfos, sinfo.myHandle)
delete(sinfo.core.sessions.byMySes, sinfo.mySesPub)
delete(sinfo.core.sessions.byTheirPerm, sinfo.theirPermPub)
delete(sinfo.core.sessions.addrToPerm, sinfo.theirAddr)
delete(sinfo.core.sessions.subnetToPerm, sinfo.theirSubnet)
close(sinfo.worker)
}