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package main
import (
"errors"
"net"
"sync"
"time"
)
const ()
type Peer struct {
mutex sync.RWMutex
endpoint *net.UDPAddr
persistentKeepaliveInterval time.Duration // 0 = disabled
keyPairs KeyPairs
handshake Handshake
device *Device
tx_bytes uint64
rx_bytes uint64
time struct {
lastSend time.Time // last send message
}
signal struct {
newHandshake chan bool
flushNonceQueue chan bool // empty queued packets
stopSending chan bool // stop sending pipeline
stopInitiator chan bool // stop initiator timer
}
timer struct {
sendKeepalive time.Timer
handshakeTimeout time.Timer
}
queue struct {
nonce chan []byte // nonce / pre-handshake queue
outbound chan *QueueOutboundElement // sequential ordering of work
}
mac MacStatePeer
}
func (device *Device) NewPeer(pk NoisePublicKey) *Peer {
var peer Peer
// create peer
peer.mutex.Lock()
peer.device = device
peer.keyPairs.Init()
peer.mac.Init(pk)
peer.queue.outbound = make(chan *QueueOutboundElement, QueueOutboundSize)
peer.queue.nonce = make(chan []byte, QueueOutboundSize)
// map public key
device.mutex.Lock()
_, ok := device.peers[pk]
if ok {
panic(errors.New("bug: adding existing peer"))
}
device.peers[pk] = &peer
device.mutex.Unlock()
// precompute DH
handshake := &peer.handshake
handshake.mutex.Lock()
handshake.remoteStatic = pk
handshake.precomputedStaticStatic = device.privateKey.sharedSecret(handshake.remoteStatic)
handshake.mutex.Unlock()
peer.mutex.Unlock()
// start workers
peer.signal.stopSending = make(chan bool, 1)
peer.signal.stopInitiator = make(chan bool, 1)
peer.signal.newHandshake = make(chan bool, 1)
peer.signal.flushNonceQueue = make(chan bool, 1)
go peer.RoutineNonce()
go peer.RoutineHandshakeInitiator()
return &peer
}
func (peer *Peer) Close() {
peer.signal.stopSending <- true
peer.signal.stopInitiator <- true
}
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