mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-09-20 02:32:32 +00:00
clean up unused session code
This commit is contained in:
Arceliar
parent
533da351f9
commit
e3603c0462
@ -161,12 +161,6 @@ func (r *router) _handleTraffic(packet []byte) {
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return
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}
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sinfo.recv(r, &p)
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return
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select {
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case sinfo.fromRouter <- p:
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case <-sinfo.cancel.Finished():
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util.PutBytes(p.Payload)
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}
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}
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// Handles protocol traffic by decrypting it, checking its type, and passing it to the appropriate handler for that traffic type.
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@ -7,7 +7,6 @@ package yggdrasil
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import (
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"bytes"
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"container/heap"
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"errors"
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"sync"
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"time"
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@ -71,9 +70,7 @@ type sessionInfo struct {
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bytesRecvd uint64 // Bytes of real traffic received in this session
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init chan struct{} // Closed when the first session pong arrives, used to signal that the session is ready for initial use
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cancel util.Cancellation // Used to terminate workers
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fromRouter chan wire_trafficPacket // Received packets go here, to be decrypted by the session
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toConn chan []byte // Decrypted packets go here, picked up by the associated Conn
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fromConn chan FlowKeyMessage // Packets with optional flow key go here, to be encrypted and sent
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callbacks []chan func() // Finished work from crypto workers
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}
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@ -253,9 +250,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
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sinfo.myHandle = *crypto.NewHandle()
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sinfo.theirAddr = *address.AddrForNodeID(crypto.GetNodeID(&sinfo.theirPermPub))
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sinfo.theirSubnet = *address.SubnetForNodeID(crypto.GetNodeID(&sinfo.theirPermPub))
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sinfo.fromRouter = make(chan wire_trafficPacket, 1)
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sinfo.toConn = make(chan []byte, 32)
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sinfo.fromConn = make(chan FlowKeyMessage, 32)
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ss.sinfos[sinfo.myHandle] = &sinfo
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ss.byTheirPerm[sinfo.theirPermPub] = &sinfo.myHandle
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go func() {
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@ -479,207 +474,11 @@ func (ss *sessions) reset() {
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//////////////////////////// Worker Functions Below ////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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func (sinfo *sessionInfo) startWorkers() {
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go sinfo.recvWorker()
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go sinfo.sendWorker()
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}
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type FlowKeyMessage struct {
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FlowKey uint64
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Message []byte
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}
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func (sinfo *sessionInfo) recvWorker() {
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// TODO move theirNonce etc into a struct that gets stored here, passed in over a channel
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// Since there's no reason for anywhere else in the session code to need to *read* it...
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// Only needs to be updated from the outside if a ping resets it...
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// That would get rid of the need to take a mutex for the sessionFunc
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var callbacks []chan func()
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doRecv := func(p wire_trafficPacket) {
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var bs []byte
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var err error
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var k crypto.BoxSharedKey
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sessionFunc := func() {
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if !sinfo._nonceIsOK(&p.Nonce) {
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err = ConnError{errors.New("packet dropped due to invalid nonce"), false, true, false, 0}
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return
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}
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k = sinfo.sharedSesKey
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}
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sinfo.doFunc(sessionFunc)
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if err != nil {
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util.PutBytes(p.Payload)
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return
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}
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var isOK bool
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ch := make(chan func(), 1)
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poolFunc := func() {
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bs, isOK = crypto.BoxOpen(&k, p.Payload, &p.Nonce)
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callback := func() {
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util.PutBytes(p.Payload)
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if !isOK {
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util.PutBytes(bs)
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return
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}
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sessionFunc = func() {
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if k != sinfo.sharedSesKey || !sinfo._nonceIsOK(&p.Nonce) {
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// The session updated in the mean time, so return an error
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err = ConnError{errors.New("session updated during crypto operation"), false, true, false, 0}
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return
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}
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sinfo._updateNonce(&p.Nonce)
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sinfo.time = time.Now()
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sinfo.bytesRecvd += uint64(len(bs))
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}
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sinfo.doFunc(sessionFunc)
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if err != nil {
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// Not sure what else to do with this packet, I guess just drop it
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util.PutBytes(bs)
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} else {
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// Pass the packet to the buffer for Conn.Read
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select {
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case <-sinfo.cancel.Finished():
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util.PutBytes(bs)
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case sinfo.toConn <- bs:
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}
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}
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}
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ch <- callback
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}
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// Send to the worker and wait for it to finish
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util.WorkerGo(poolFunc)
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callbacks = append(callbacks, ch)
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}
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fromHelper := make(chan wire_trafficPacket, 1)
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go func() {
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var buf []wire_trafficPacket
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for {
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for len(buf) > 0 {
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select {
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case <-sinfo.cancel.Finished():
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return
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case p := <-sinfo.fromRouter:
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buf = append(buf, p)
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for len(buf) > 64 { // Based on nonce window size
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util.PutBytes(buf[0].Payload)
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buf = buf[1:]
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}
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case fromHelper <- buf[0]:
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buf = buf[1:]
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}
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}
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select {
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case <-sinfo.cancel.Finished():
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return
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case p := <-sinfo.fromRouter:
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buf = append(buf, p)
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}
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}
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}()
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select {
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case <-sinfo.cancel.Finished():
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return
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case <-sinfo.init:
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// Wait until the session has finished initializing before processing any packets
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}
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for {
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for len(callbacks) > 0 {
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select {
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case f := <-callbacks[0]:
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callbacks = callbacks[1:]
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f()
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case <-sinfo.cancel.Finished():
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return
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case p := <-fromHelper:
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doRecv(p)
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}
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}
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select {
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case <-sinfo.cancel.Finished():
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return
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case p := <-fromHelper:
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doRecv(p)
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}
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}
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}
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func (sinfo *sessionInfo) sendWorker() {
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// TODO move info that this worker needs here, send updates via a channel
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// Otherwise we need to take a mutex to avoid races with update()
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var callbacks []chan func()
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doSend := func(msg FlowKeyMessage) {
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var p wire_trafficPacket
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var k crypto.BoxSharedKey
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sessionFunc := func() {
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sinfo.bytesSent += uint64(len(msg.Message))
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p = wire_trafficPacket{
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Coords: append([]byte(nil), sinfo.coords...),
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Handle: sinfo.theirHandle,
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Nonce: sinfo.myNonce,
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}
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if msg.FlowKey != 0 {
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// Helps ensure that traffic from this flow ends up in a separate queue from other flows
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// The zero padding relies on the fact that the self-peer is always on port 0
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p.Coords = append(p.Coords, 0)
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p.Coords = wire_put_uint64(msg.FlowKey, p.Coords)
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}
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sinfo.myNonce.Increment()
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k = sinfo.sharedSesKey
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}
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// Get the mutex-protected info needed to encrypt the packet
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sinfo.doFunc(sessionFunc)
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ch := make(chan func(), 1)
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poolFunc := func() {
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// Encrypt the packet
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p.Payload, _ = crypto.BoxSeal(&k, msg.Message, &p.Nonce)
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// The callback will send the packet
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callback := func() {
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// Encoding may block on a util.GetBytes(), so kept out of the worker pool
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packet := p.encode()
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// Cleanup
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util.PutBytes(msg.Message)
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util.PutBytes(p.Payload)
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// Send the packet
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// TODO replace this with a send to the peer struct if that becomes an actor
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sinfo.sessions.router.EnqueueFrom(sinfo, func() {
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sinfo.sessions.router.out(packet)
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})
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}
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ch <- callback
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}
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// Send to the worker and wait for it to finish
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util.WorkerGo(poolFunc)
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callbacks = append(callbacks, ch)
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}
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select {
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case <-sinfo.cancel.Finished():
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return
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case <-sinfo.init:
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// Wait until the session has finished initializing before processing any packets
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}
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for {
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for len(callbacks) > 0 {
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select {
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case f := <-callbacks[0]:
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callbacks = callbacks[1:]
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f()
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case <-sinfo.cancel.Finished():
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return
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case msg := <-sinfo.fromConn:
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doSend(msg)
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}
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}
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select {
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case <-sinfo.cancel.Finished():
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return
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case bs := <-sinfo.fromConn:
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doSend(bs)
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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func (sinfo *sessionInfo) recv(from phony.IActor, packet *wire_trafficPacket) {
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sinfo.EnqueueFrom(from, func() {
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sinfo._recvPacket(packet)
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