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clean up unused session code

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This commit is contained in:
Arceliar 2019-08-23 22:25:40 -05:00
parent 533da351f9
commit e3603c0462
2 changed files with 0 additions and 207 deletions
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6
src/yggdrasil/router.go
View File

@ -161,12 +161,6 @@ func (r *router) _handleTraffic(packet []byte) {
return
}
sinfo.recv(r, &p)
return
select {
case sinfo.fromRouter <- p:
case <-sinfo.cancel.Finished():
util.PutBytes(p.Payload)
}
}
// Handles protocol traffic by decrypting it, checking its type, and passing it to the appropriate handler for that traffic type.

201
src/yggdrasil/session.go
View File

@ -7,7 +7,6 @@ package yggdrasil
import (
"bytes"
"container/heap"
"errors"
"sync"
"time"
@ -71,9 +70,7 @@ type sessionInfo struct {
bytesRecvd uint64 // Bytes of real traffic received in this session
init chan struct{} // Closed when the first session pong arrives, used to signal that the session is ready for initial use
cancel util.Cancellation // Used to terminate workers
fromRouter chan wire_trafficPacket // Received packets go here, to be decrypted by the session
toConn chan []byte // Decrypted packets go here, picked up by the associated Conn
fromConn chan FlowKeyMessage // Packets with optional flow key go here, to be encrypted and sent
callbacks []chan func() // Finished work from crypto workers
}
@ -253,9 +250,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
sinfo.myHandle = *crypto.NewHandle()
sinfo.theirAddr = *address.AddrForNodeID(crypto.GetNodeID(&sinfo.theirPermPub))
sinfo.theirSubnet = *address.SubnetForNodeID(crypto.GetNodeID(&sinfo.theirPermPub))
sinfo.fromRouter = make(chan wire_trafficPacket, 1)
sinfo.toConn = make(chan []byte, 32)
sinfo.fromConn = make(chan FlowKeyMessage, 32)
ss.sinfos[sinfo.myHandle] = &sinfo
ss.byTheirPerm[sinfo.theirPermPub] = &sinfo.myHandle
go func() {
@ -479,207 +474,11 @@ func (ss *sessions) reset() {
//////////////////////////// Worker Functions Below ////////////////////////////
////////////////////////////////////////////////////////////////////////////////
func (sinfo *sessionInfo) startWorkers() {
go sinfo.recvWorker()
go sinfo.sendWorker()
}
type FlowKeyMessage struct {
FlowKey uint64
Message []byte
}
func (sinfo *sessionInfo) recvWorker() {
// TODO move theirNonce etc into a struct that gets stored here, passed in over a channel
// Since there's no reason for anywhere else in the session code to need to *read* it...
// Only needs to be updated from the outside if a ping resets it...
// That would get rid of the need to take a mutex for the sessionFunc
var callbacks []chan func()
doRecv := func(p wire_trafficPacket) {
var bs []byte
var err error
var k crypto.BoxSharedKey
sessionFunc := func() {
if !sinfo._nonceIsOK(&p.Nonce) {
err = ConnError{errors.New("packet dropped due to invalid nonce"), false, true, false, 0}
return
}
k = sinfo.sharedSesKey
}
sinfo.doFunc(sessionFunc)
if err != nil {
util.PutBytes(p.Payload)
return
}
var isOK bool
ch := make(chan func(), 1)
poolFunc := func() {
bs, isOK = crypto.BoxOpen(&k, p.Payload, &p.Nonce)
callback := func() {
util.PutBytes(p.Payload)
if !isOK {
util.PutBytes(bs)
return
}
sessionFunc = func() {
if k != sinfo.sharedSesKey || !sinfo._nonceIsOK(&p.Nonce) {
// The session updated in the mean time, so return an error
err = ConnError{errors.New("session updated during crypto operation"), false, true, false, 0}
return
}
sinfo._updateNonce(&p.Nonce)
sinfo.time = time.Now()
sinfo.bytesRecvd += uint64(len(bs))
}
sinfo.doFunc(sessionFunc)
if err != nil {
// Not sure what else to do with this packet, I guess just drop it
util.PutBytes(bs)
} else {
// Pass the packet to the buffer for Conn.Read
select {
case <-sinfo.cancel.Finished():
util.PutBytes(bs)
case sinfo.toConn <- bs:
}
}
}
ch <- callback
}
// Send to the worker and wait for it to finish
util.WorkerGo(poolFunc)
callbacks = append(callbacks, ch)
}
fromHelper := make(chan wire_trafficPacket, 1)
go func() {
var buf []wire_trafficPacket
for {
for len(buf) > 0 {
select {
case <-sinfo.cancel.Finished():
return
case p := <-sinfo.fromRouter:
buf = append(buf, p)
for len(buf) > 64 { // Based on nonce window size
util.PutBytes(buf[0].Payload)
buf = buf[1:]
}
case fromHelper <- buf[0]:
buf = buf[1:]
}
}
select {
case <-sinfo.cancel.Finished():
return
case p := <-sinfo.fromRouter:
buf = append(buf, p)
}
}
}()
select {
case <-sinfo.cancel.Finished():
return
case <-sinfo.init:
// Wait until the session has finished initializing before processing any packets
}
for {
for len(callbacks) > 0 {
select {
case f := <-callbacks[0]:
callbacks = callbacks[1:]
f()
case <-sinfo.cancel.Finished():
return
case p := <-fromHelper:
doRecv(p)
}
}
select {
case <-sinfo.cancel.Finished():
return
case p := <-fromHelper:
doRecv(p)
}
}
}
func (sinfo *sessionInfo) sendWorker() {
// TODO move info that this worker needs here, send updates via a channel
// Otherwise we need to take a mutex to avoid races with update()
var callbacks []chan func()
doSend := func(msg FlowKeyMessage) {
var p wire_trafficPacket
var k crypto.BoxSharedKey
sessionFunc := func() {
sinfo.bytesSent += uint64(len(msg.Message))
p = wire_trafficPacket{
Coords: append([]byte(nil), sinfo.coords...),
Handle: sinfo.theirHandle,
Nonce: sinfo.myNonce,
}
if msg.FlowKey != 0 {
// Helps ensure that traffic from this flow ends up in a separate queue from other flows
// The zero padding relies on the fact that the self-peer is always on port 0
p.Coords = append(p.Coords, 0)
p.Coords = wire_put_uint64(msg.FlowKey, p.Coords)
}
sinfo.myNonce.Increment()
k = sinfo.sharedSesKey
}
// Get the mutex-protected info needed to encrypt the packet
sinfo.doFunc(sessionFunc)
ch := make(chan func(), 1)
poolFunc := func() {
// Encrypt the packet
p.Payload, _ = crypto.BoxSeal(&k, msg.Message, &p.Nonce)
// The callback will send the packet
callback := func() {
// Encoding may block on a util.GetBytes(), so kept out of the worker pool
packet := p.encode()
// Cleanup
util.PutBytes(msg.Message)
util.PutBytes(p.Payload)
// Send the packet
// TODO replace this with a send to the peer struct if that becomes an actor
sinfo.sessions.router.EnqueueFrom(sinfo, func() {
sinfo.sessions.router.out(packet)
})
}
ch <- callback
}
// Send to the worker and wait for it to finish
util.WorkerGo(poolFunc)
callbacks = append(callbacks, ch)
}
select {
case <-sinfo.cancel.Finished():
return
case <-sinfo.init:
// Wait until the session has finished initializing before processing any packets
}
for {
for len(callbacks) > 0 {
select {
case f := <-callbacks[0]:
callbacks = callbacks[1:]
f()
case <-sinfo.cancel.Finished():
return
case msg := <-sinfo.fromConn:
doSend(msg)
}
}
select {
case <-sinfo.cancel.Finished():
return
case bs := <-sinfo.fromConn:
doSend(bs)
}
}
}
////////////////////////////////////////////////////////////////////////////////
func (sinfo *sessionInfo) recv(from phony.IActor, packet *wire_trafficPacket) {
sinfo.EnqueueFrom(from, func() {
sinfo._recvPacket(packet)