From e7cb76cea3cad1ac735c712b1b32b2a7b1d34b53 Mon Sep 17 00:00:00 2001
From: Arceliar <Arceliar@users.noreply.github.com>
Date: Fri, 28 Jun 2019 19:21:44 -0500
Subject: [PATCH] clean up unused old session maps

---
 src/yggdrasil/session.go | 60 +---------------------------------------
 1 file changed, 1 insertion(+), 59 deletions(-)

diff --git a/src/yggdrasil/session.go b/src/yggdrasil/session.go
index 2211847..55b0ed4 100644
--- a/src/yggdrasil/session.go
+++ b/src/yggdrasil/session.go
@@ -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)
 }