move generic communication substrate into its own 'mesh' package

This is mostly a matter of moving some files, changing package names,
changing some imports, and changing some type references.

We duplicate the odd constant & global var, and the intmac/macint
functions, since neither 'router' or 'mesh' nor, really,' common' are
a natural home for them.

Makefile

@@ -70,7 +70,7 @@ $(NETCHECK_EXE): common/*.go common/*/*.go net/*.go
 	go build $(BUILD_FLAGS) -o $@ ./$(@D)
 	$(NETGO_CHECK)
 
-$(WEAVER_EXE): router/*.go ipam/*.go ipam/*/*.go nameserver/*.go prog/weaver/*.go
+$(WEAVER_EXE): router/*.go mesh/*.go ipam/*.go ipam/*/*.go nameserver/*.go prog/weaver/*.go
 $(WEAVEPROXY_EXE): proxy/*.go prog/weaveproxy/main.go
 $(NETCHECK_EXE): prog/netcheck/netcheck.go
 

ipam/allocator.go

@@ -11,8 +11,8 @@ import (
 	"github.com/weaveworks/weave/ipam/paxos"
 	"github.com/weaveworks/weave/ipam/ring"
 	"github.com/weaveworks/weave/ipam/space"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 // Kinds of message we can unicast to other peers
@@ -43,31 +43,31 @@ type operation interface {
 // are used around data structures.
 type Allocator struct {
 	actionChan       chan<- func()
-	ourName          router.PeerName
+	ourName          mesh.PeerName
 	universe         address.Range                // superset of all ranges
 	ring             *ring.Ring                   // information on ranges owned by all peers
 	space            space.Space                  // more detail on ranges owned by us
 	owned            map[string][]address.Address // who owns what addresses, indexed by container-ID
-	nicknames        map[router.PeerName]string   // so we can map nicknames for rmpeer
+	nicknames        map[mesh.PeerName]string     // so we can map nicknames for rmpeer
 	pendingAllocates []operation                  // held until we get some free space
 	pendingClaims    []operation                  // held until we know who owns the space
-	gossip           router.Gossip                // our link to the outside world for sending messages
+	gossip           mesh.Gossip                  // our link to the outside world for sending messages
 	paxos            *paxos.Node
 	paxosTicker      *time.Ticker
 	shuttingDown     bool // to avoid doing any requests while trying to shut down
-	isKnownPeer      func(router.PeerName) bool
+	isKnownPeer      func(mesh.PeerName) bool
 	now              func() time.Time
 }
 
 // NewAllocator creates and initialises a new Allocator
-func NewAllocator(ourName router.PeerName, ourUID router.PeerUID, ourNickname string, universe address.Range, quorum uint, isKnownPeer func(name router.PeerName) bool) *Allocator {
+func NewAllocator(ourName mesh.PeerName, ourUID mesh.PeerUID, ourNickname string, universe address.Range, quorum uint, isKnownPeer func(name mesh.PeerName) bool) *Allocator {
 	return &Allocator{
 		ourName:     ourName,
 		universe:    universe,
 		ring:        ring.New(universe.Start, universe.End, ourName),
 		owned:       make(map[string][]address.Address),
 		paxos:       paxos.NewNode(ourName, ourUID, quorum),
-		nicknames:   map[router.PeerName]string{ourName: ourNickname},
+		nicknames:   map[mesh.PeerName]string{ourName: ourNickname},
 		isKnownPeer: isKnownPeer,
 		now:         time.Now,
 	}
@@ -75,7 +75,7 @@ func NewAllocator(ourName router.PeerName, ourUID router.PeerUID, ourNickname st
 
 // Start runs the allocator goroutine
 func (alloc *Allocator) Start() {
-	actionChan := make(chan func(), router.ChannelSize)
+	actionChan := make(chan func(), mesh.ChannelSize)
 	alloc.actionChan = actionChan
 	go alloc.actorLoop(actionChan)
 }
@@ -165,7 +165,7 @@ func (alloc *Allocator) tryPendingOps() {
 	}
 }
 
-func (alloc *Allocator) spaceRequestDenied(sender router.PeerName, r address.Range) {
+func (alloc *Allocator) spaceRequestDenied(sender mesh.PeerName, r address.Range) {
 	for i := 0; i < len(alloc.pendingClaims); {
 		claim := alloc.pendingClaims[i].(*claim)
 		if r.Contains(claim.addr) {
@@ -276,27 +276,27 @@ func (alloc *Allocator) Free(ident string, addrToFree address.Address) error {
 	return <-errChan
 }
 
-func (alloc *Allocator) pickPeerFromNicknames(isValid func(router.PeerName) bool) router.PeerName {
+func (alloc *Allocator) pickPeerFromNicknames(isValid func(mesh.PeerName) bool) mesh.PeerName {
 	for name := range alloc.nicknames {
 		if name != alloc.ourName && isValid(name) {
 			return name
 		}
 	}
-	return router.UnknownPeerName
+	return mesh.UnknownPeerName
 }
 
-func (alloc *Allocator) pickPeerForTransfer() router.PeerName {
+func (alloc *Allocator) pickPeerForTransfer() mesh.PeerName {
 	// first try alive peers that actively participate in IPAM (i.e. have entries)
-	if heir := alloc.ring.PickPeerForTransfer(alloc.isKnownPeer); heir != router.UnknownPeerName {
+	if heir := alloc.ring.PickPeerForTransfer(alloc.isKnownPeer); heir != mesh.UnknownPeerName {
 		return heir
 	}
 	// next try alive peers that have IPAM enabled but have no entries
-	if heir := alloc.pickPeerFromNicknames(alloc.isKnownPeer); heir != router.UnknownPeerName {
+	if heir := alloc.pickPeerFromNicknames(alloc.isKnownPeer); heir != mesh.UnknownPeerName {
 		return heir
 	}
 	// next try disappeared peers that still have entries
-	t := func(router.PeerName) bool { return true }
-	if heir := alloc.ring.PickPeerForTransfer(t); heir != router.UnknownPeerName {
+	t := func(mesh.PeerName) bool { return true }
+	if heir := alloc.ring.PickPeerForTransfer(t); heir != mesh.UnknownPeerName {
 		return heir
 	}
 	// finally, disappeared peers that that passively participated in IPAM
@@ -311,7 +311,7 @@ func (alloc *Allocator) Shutdown() {
 		alloc.shuttingDown = true
 		alloc.cancelOps(&alloc.pendingClaims)
 		alloc.cancelOps(&alloc.pendingAllocates)
-		if heir := alloc.pickPeerForTransfer(); heir != router.UnknownPeerName {
+		if heir := alloc.pickPeerForTransfer(); heir != mesh.UnknownPeerName {
 			alloc.ring.Transfer(alloc.ourName, heir)
 			alloc.space.Clear()
 			alloc.gossip.GossipBroadcast(alloc.Gossip())
@@ -350,14 +350,14 @@ func (alloc *Allocator) AdminTakeoverRanges(peerNameOrNickname string) error {
 // call into the router for this because we are interested in peers
 // that have gone away but are still in the ring, which is why we
 // maintain our own nicknames map.
-func (alloc *Allocator) lookupPeername(name string) (router.PeerName, error) {
+func (alloc *Allocator) lookupPeername(name string) (mesh.PeerName, error) {
 	for peername, nickname := range alloc.nicknames {
 		if nickname == name {
 			return peername, nil
 		}
 	}
 
-	return router.PeerNameFromString(name)
+	return mesh.PeerNameFromString(name)
 }
 
 // Restrict the peers in "nicknames" to those in the ring plus peers known to the router
@@ -370,7 +370,7 @@ func (alloc *Allocator) pruneNicknames() {
 	}
 }
 
-func (alloc *Allocator) annotatePeernames(names []router.PeerName) []string {
+func (alloc *Allocator) annotatePeernames(names []mesh.PeerName) []string {
 	var res []string
 	for _, name := range names {
 		if nickname, found := alloc.nicknames[name]; found {
@@ -388,7 +388,7 @@ func decodeRange(msg []byte) (r address.Range, err error) {
 }
 
 // OnGossipUnicast (Sync)
-func (alloc *Allocator) OnGossipUnicast(sender router.PeerName, msg []byte) error {
+func (alloc *Allocator) OnGossipUnicast(sender mesh.PeerName, msg []byte) error {
 	alloc.debugln("OnGossipUnicast from", sender, ": ", len(msg), "bytes")
 	resultChan := make(chan error)
 	alloc.actionChan <- func() {
@@ -414,7 +414,7 @@ func (alloc *Allocator) OnGossipUnicast(sender router.PeerName, msg []byte) erro
 }
 
 // OnGossipBroadcast (Sync)
-func (alloc *Allocator) OnGossipBroadcast(sender router.PeerName, msg []byte) (router.GossipData, error) {
+func (alloc *Allocator) OnGossipBroadcast(sender mesh.PeerName, msg []byte) (mesh.GossipData, error) {
 	alloc.debugln("OnGossipBroadcast from", sender, ":", len(msg), "bytes")
 	resultChan := make(chan error)
 	alloc.actionChan <- func() {
@@ -427,7 +427,7 @@ type gossipState struct {
 	// We send a timstamp along with the information to be
 	// gossipped in order to detect skewed clocks
 	Now       int64
-	Nicknames map[router.PeerName]string
+	Nicknames map[mesh.PeerName]string
 
 	Paxos paxos.GossipState
 	Ring  *ring.Ring
@@ -463,11 +463,11 @@ func (alloc *Allocator) Encode() []byte {
 }
 
 // OnGossip (Sync)
-func (alloc *Allocator) OnGossip(msg []byte) (router.GossipData, error) {
+func (alloc *Allocator) OnGossip(msg []byte) (mesh.GossipData, error) {
 	alloc.debugln("Allocator.OnGossip:", len(msg), "bytes")
 	resultChan := make(chan error)
 	alloc.actionChan <- func() {
-		resultChan <- alloc.update(router.UnknownPeerName, msg)
+		resultChan <- alloc.update(mesh.UnknownPeerName, msg)
 	}
 	return nil, <-resultChan // for now, we never propagate updates. TBD
 }
@@ -478,7 +478,7 @@ type ipamGossipData struct {
 	alloc *Allocator
 }
 
-func (d *ipamGossipData) Merge(other router.GossipData) {
+func (d *ipamGossipData) Merge(other mesh.GossipData) {
 	// no-op
 }
 
@@ -488,12 +488,12 @@ func (d *ipamGossipData) Encode() [][]byte {
 
 // Gossip returns a GossipData implementation, which in this case always
 // returns the latest ring state (and does nothing on merge)
-func (alloc *Allocator) Gossip() router.GossipData {
+func (alloc *Allocator) Gossip() mesh.GossipData {
 	return &ipamGossipData{alloc}
 }
 
 // SetInterfaces gives the allocator two interfaces for talking to the outside world
-func (alloc *Allocator) SetInterfaces(gossip router.Gossip) {
+func (alloc *Allocator) SetInterfaces(gossip mesh.Gossip) {
 	alloc.gossip = gossip
 }
 
@@ -540,7 +540,7 @@ func (alloc *Allocator) establishRing() {
 	}
 }
 
-func (alloc *Allocator) createRing(peers []router.PeerName) {
+func (alloc *Allocator) createRing(peers []mesh.PeerName) {
 	alloc.debugln("Paxos consensus:", peers)
 	alloc.ring.ClaimForPeers(normalizeConsensus(peers))
 	alloc.gossip.GossipBroadcast(alloc.Gossip())
@@ -563,7 +563,7 @@ func (alloc *Allocator) ringUpdated() {
 }
 
 // For compatibility with sort.Interface
-type peerNames []router.PeerName
+type peerNames []mesh.PeerName
 
 func (a peerNames) Len() int           { return len(a) }
 func (a peerNames) Less(i, j int) bool { return a[i] < a[j] }
@@ -572,7 +572,7 @@ func (a peerNames) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
 // When we get a consensus from Paxos, the peer names are not in a
 // defined order and may contain duplicates.  This function sorts them
 // and de-dupes.
-func normalizeConsensus(consensus []router.PeerName) []router.PeerName {
+func normalizeConsensus(consensus []mesh.PeerName) []mesh.PeerName {
 	if len(consensus) == 0 {
 		return nil
 	}
@@ -607,22 +607,22 @@ func encodeRange(r address.Range) []byte {
 	return buf.Bytes()
 }
 
-func (alloc *Allocator) sendSpaceRequest(dest router.PeerName, r address.Range) error {
+func (alloc *Allocator) sendSpaceRequest(dest mesh.PeerName, r address.Range) error {
 	msg := append([]byte{msgSpaceRequest}, encodeRange(r)...)
 	return alloc.gossip.GossipUnicast(dest, msg)
 }
 
-func (alloc *Allocator) sendSpaceRequestDenied(dest router.PeerName, r address.Range) error {
+func (alloc *Allocator) sendSpaceRequestDenied(dest mesh.PeerName, r address.Range) error {
 	msg := append([]byte{msgSpaceRequestDenied}, encodeRange(r)...)
 	return alloc.gossip.GossipUnicast(dest, msg)
 }
 
-func (alloc *Allocator) sendRingUpdate(dest router.PeerName) {
+func (alloc *Allocator) sendRingUpdate(dest mesh.PeerName) {
 	msg := append([]byte{msgRingUpdate}, alloc.encode()...)
 	alloc.gossip.GossipUnicast(dest, msg)
 }
 
-func (alloc *Allocator) update(sender router.PeerName, msg []byte) error {
+func (alloc *Allocator) update(sender mesh.PeerName, msg []byte) error {
 	reader := bytes.NewReader(msg)
 	decoder := gob.NewDecoder(reader)
 	var data gossipState
@@ -674,7 +674,7 @@ func (alloc *Allocator) update(sender router.PeerName, msg []byte) error {
 					alloc.createRing(cons.Value)
 				}
 			}
-		} else if sender != router.UnknownPeerName {
+		} else if sender != mesh.UnknownPeerName {
 			// Sender is trying to initialize a ring, but we have one
 			// already - send it straight back
 			alloc.sendRingUpdate(sender)
@@ -684,7 +684,7 @@ func (alloc *Allocator) update(sender router.PeerName, msg []byte) error {
 	return nil
 }
 
-func (alloc *Allocator) donateSpace(r address.Range, to router.PeerName) {
+func (alloc *Allocator) donateSpace(r address.Range, to mesh.PeerName) {
 	// No matter what we do, we'll send a unicast gossip
 	// of our ring back to tha chap who asked for space.
 	// This serves to both tell him of any space we might

ipam/claim.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 
 	"github.com/weaveworks/weave/common"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 type claim struct {
@@ -43,7 +43,7 @@ func (c *claim) Try(alloc *Allocator) bool {
 	switch owner := alloc.ring.Owner(c.addr); owner {
 	case alloc.ourName:
 		// success
-	case router.UnknownPeerName:
+	case mesh.UnknownPeerName:
 		// If our ring doesn't know, it must be empty.
 		if c.noErrorOnUnknown {
 			alloc.infof("Claim %s for %s: address allocator still initializing; will try later.", c.addr, c.ident)
@@ -86,7 +86,7 @@ func (c *claim) Try(alloc *Allocator) bool {
 	return true
 }
 
-func (c *claim) deniedBy(alloc *Allocator, owner router.PeerName) {
+func (c *claim) deniedBy(alloc *Allocator, owner mesh.PeerName) {
 	name, found := alloc.nicknames[owner]
 	if found {
 		name = " (" + name + ")"

ipam/paxos/paxos.go

@@ -1,7 +1,7 @@
 package paxos
 
 import (
-	"github.com/weaveworks/weave/router"
+	"github.com/weaveworks/weave/mesh"
 )
 
 // The node identifier.  The use of the UID here is important: Paxos
@@ -9,8 +9,8 @@ import (
 // node does not restart and lose its Paxos state but claim to have
 // the same ID.
 type NodeID struct {
-	Name router.PeerName
-	UID  router.PeerUID
+	Name mesh.PeerName
+	UID  mesh.PeerUID
 }
 
 // note all fields exported in structs so we can Gob them
@@ -39,7 +39,7 @@ func (a ProposalID) valid() bool {
 }
 
 // For seeding IPAM, the value we want consensus on is a set of peer names
-type Value []router.PeerName
+type Value []mesh.PeerName
 
 // An AcceptedValue is a Value plus the proposal which originated that
 // Value.  The origin is not essential, but makes comparing
@@ -72,7 +72,7 @@ type Node struct {
 	knows  GossipState
 }
 
-func NewNode(name router.PeerName, uid router.PeerUID, quorum uint) *Node {
+func NewNode(name mesh.PeerName, uid mesh.PeerUID, quorum uint) *Node {
 	return &Node{
 		id:     NodeID{name, uid},
 		quorum: quorum,
@@ -223,7 +223,7 @@ func (node *Node) Think() bool {
 // about.  This is not necessarily all peer names, but it is at least
 // a quorum, and so good enough for seeding the ring.
 func (node *Node) pickValue() Value {
-	val := make([]router.PeerName, len(node.knows))
+	val := make([]mesh.PeerName, len(node.knows))
 	i := 0
 	for id := range node.knows {
 		val[i] = id.Name

ipam/paxos/paxos_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/weaveworks/weave/router"
+	"github.com/weaveworks/weave/mesh"
 )
 
 type TestNode struct {
@@ -97,8 +97,8 @@ func makeRandomModel(params *TestParams, r *rand.Rand, t *testing.T) *Model {
 	}
 
 	for i := range m.nodes {
-		m.nodes[i].Node = NewNode(router.PeerName(i/2+1),
-			router.PeerUID(r.Int63()), m.quorum)
+		m.nodes[i].Node = NewNode(mesh.PeerName(i/2+1),
+			mesh.PeerUID(r.Int63()), m.quorum)
 		m.nodes[i].Propose()
 	}
 
@@ -172,8 +172,8 @@ func (m *Model) isolateNode(node *TestNode) {
 
 // Restart a node
 func (m *Model) restart(node *TestNode) {
-	node.Node = NewNode(router.PeerName(m.nextID),
-		router.PeerUID(m.r.Int63()), m.quorum)
+	node.Node = NewNode(mesh.PeerName(m.nextID),
+		mesh.PeerUID(m.r.Int63()), m.quorum)
 	m.nextID++
 	node.Propose()
 

ipam/ring/entry.go

@@ -4,14 +4,14 @@ import (
 	"sort"
 
 	"github.com/weaveworks/weave/common"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 // Entry represents entries around the ring
 type entry struct {
 	Token   address.Address // The start of this range
-	Peer    router.PeerName // Who owns this range
+	Peer    mesh.PeerName   // Who owns this range
 	Version uint32          // Version of this range
 	Free    address.Offset  // Number of free IPs in this range
 }
@@ -21,7 +21,7 @@ func (e *entry) Equal(e2 *entry) bool {
 		e.Version == e2.Version
 }
 
-func (e *entry) update(peername router.PeerName, free address.Offset) {
+func (e *entry) update(peername mesh.PeerName, free address.Offset) {
 	e.Peer = peername
 	e.Version++
 	e.Free = free

ipam/ring/ring.go

@@ -13,16 +13,16 @@ import (
 	"time"
 
 	"github.com/weaveworks/weave/common"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 // Ring represents the ring itself
 type Ring struct {
-	Start, End address.Address   // [min, max) tokens in this ring.  Due to wrapping, min == max (effectively)
-	Peer       router.PeerName   // name of peer owning this ring instance
-	Entries    entries           // list of entries sorted by token
-	Seeds      []router.PeerName // peers with which the ring was seeded
+	Start, End address.Address // [min, max) tokens in this ring.  Due to wrapping, min == max (effectively)
+	Peer       mesh.PeerName   // name of peer owning this ring instance
+	Entries    entries         // list of entries sorted by token
+	Seeds      []mesh.PeerName // peers with which the ring was seeded
 }
 
 func (r *Ring) assertInvariants() {
@@ -84,7 +84,7 @@ func (r *Ring) checkInvariants() error {
 }
 
 // New creates an empty ring belonging to peer.
-func New(start, end address.Address, peer router.PeerName) *Ring {
+func New(start, end address.Address, peer mesh.PeerName) *Ring {
 	common.Assert(start < end)
 
 	ring := &Ring{Start: start, End: end, Peer: peer, Entries: make([]*entry, 0)}
@@ -111,7 +111,7 @@ func (r *Ring) distance(start, end address.Address) address.Offset {
 // Preconditions:
 // - start < end
 // - [start, end) must be owned by the calling peer
-func (r *Ring) GrantRangeToHost(start, end address.Address, peer router.PeerName) {
+func (r *Ring) GrantRangeToHost(start, end address.Address, peer mesh.PeerName) {
 	//fmt.Printf("%s GrantRangeToHost [%v,%v) -> %s\n", r.Peer, start, end, peer)
 
 	r.assertInvariants()
@@ -210,7 +210,7 @@ func (r *Ring) Merge(gossip Ring) error {
 	addToResult := func(e entry) { result = append(result, &e) }
 
 	var mine, theirs *entry
-	var previousOwner *router.PeerName
+	var previousOwner *mesh.PeerName
 	// i is index into r.Entries; j is index into gossip.Entries
 	var i, j int
 	for i < len(r.Entries) && j < len(gossip.Entries) {
@@ -318,7 +318,7 @@ func (r *Ring) OwnedRanges() (result []address.Range) {
 
 // ClaimForPeers claims the entire ring for the array of peers passed
 // in.  Only works for empty rings.
-func (r *Ring) ClaimForPeers(peers []router.PeerName) {
+func (r *Ring) ClaimForPeers(peers []mesh.PeerName) {
 	common.Assert(r.Empty())
 	defer r.assertInvariants()
 	defer r.updateExportedVariables()
@@ -350,7 +350,7 @@ func (r *Ring) ClaimForPeers(peers []router.PeerName) {
 	r.Seeds = peers
 }
 
-func (r *Ring) FprintWithNicknames(w io.Writer, m map[router.PeerName]string) {
+func (r *Ring) FprintWithNicknames(w io.Writer, m map[mesh.PeerName]string) {
 	for _, entry := range r.Entries {
 		nickname, found := m[entry.Peer]
 		if found {
@@ -365,7 +365,7 @@ func (r *Ring) FprintWithNicknames(w io.Writer, m map[router.PeerName]string) {
 func (r *Ring) String() string {
 	var buffer bytes.Buffer
 	fmt.Fprintf(&buffer, "Ring [%s, %s)", r.Start, r.End)
-	r.FprintWithNicknames(&buffer, make(map[router.PeerName]string))
+	r.FprintWithNicknames(&buffer, make(map[mesh.PeerName]string))
 	return buffer.String()
 }
 
@@ -415,7 +415,7 @@ func (r *Ring) ReportFree(freespace map[address.Address]address.Offset) {
 
 type weightedPeer struct {
 	weight   float64
-	peername router.PeerName
+	peername mesh.PeerName
 }
 type weightedPeers []weightedPeer
 
@@ -426,10 +426,10 @@ func (ws weightedPeers) Swap(i, j int)      { ws[i], ws[j] = ws[j], ws[i] }
 
 // ChoosePeersToAskForSpace returns all peers we can ask for space in
 // the range [start, end), in weighted-random order.  Assumes start<end.
-func (r *Ring) ChoosePeersToAskForSpace(start, end address.Address) []router.PeerName {
+func (r *Ring) ChoosePeersToAskForSpace(start, end address.Address) []mesh.PeerName {
 	var (
 		sum               address.Offset
-		totalSpacePerPeer = make(map[router.PeerName]address.Offset) // Compute total free space per peer
+		totalSpacePerPeer = make(map[mesh.PeerName]address.Offset) // Compute total free space per peer
 	)
 
 	// iterate through tokens
@@ -463,25 +463,25 @@ func (r *Ring) ChoosePeersToAskForSpace(start, end address.Address) []router.Pee
 		ws = append(ws, weightedPeer{weight: float64(space) * rand.Float64(), peername: peername})
 	}
 	sort.Sort(ws)
-	result := make([]router.PeerName, len(ws))
+	result := make([]mesh.PeerName, len(ws))
 	for i, wp := range ws {
 		result[i] = wp.peername
 	}
 	return result
 }
 
-func (r *Ring) PickPeerForTransfer(isValid func(router.PeerName) bool) router.PeerName {
+func (r *Ring) PickPeerForTransfer(isValid func(mesh.PeerName) bool) mesh.PeerName {
 	for _, entry := range r.Entries {
 		if entry.Peer != r.Peer && isValid(entry.Peer) {
 			return entry.Peer
 		}
 	}
-	return router.UnknownPeerName
+	return mesh.UnknownPeerName
 }
 
 // Transfer will mark all entries associated with 'from' peer as owned by 'to' peer
 // and return ranges indicating the new space we picked up
-func (r *Ring) Transfer(from, to router.PeerName) ([]address.Range, error) {
+func (r *Ring) Transfer(from, to mesh.PeerName) ([]address.Range, error) {
 	r.assertInvariants()
 	defer r.assertInvariants()
 	defer r.updateExportedVariables()
@@ -511,13 +511,13 @@ func (r *Ring) Contains(addr address.Address) bool {
 }
 
 // Owner returns the peername which owns the range containing addr
-func (r *Ring) Owner(token address.Address) router.PeerName {
+func (r *Ring) Owner(token address.Address) mesh.PeerName {
 	common.Assert(r.Start <= token && token < r.End)
 
 	r.assertInvariants()
 	// There can be no owners on an empty ring
 	if r.Empty() {
-		return router.UnknownPeerName
+		return mesh.UnknownPeerName
 	}
 
 	// Look for the right-most entry, less than or equal to token
@@ -530,8 +530,8 @@ func (r *Ring) Owner(token address.Address) router.PeerName {
 }
 
 // Get the set of PeerNames mentioned in the ring
-func (r *Ring) PeerNames() map[router.PeerName]struct{} {
-	res := make(map[router.PeerName]struct{})
+func (r *Ring) PeerNames() map[mesh.PeerName]struct{} {
+	res := make(map[mesh.PeerName]struct{})
 
 	for _, entry := range r.Entries {
 		res[entry.Peer] = struct{}{}

ipam/ring/ring_test.go

@@ -9,14 +9,14 @@ import (
 
 	"github.com/stretchr/testify/require"
 	"github.com/weaveworks/weave/common"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 var (
-	peer1name, _ = router.PeerNameFromString("01:00:00:00:02:00")
-	peer2name, _ = router.PeerNameFromString("02:00:00:00:02:00")
-	peer3name, _ = router.PeerNameFromString("03:00:00:00:02:00")
+	peer1name, _ = mesh.PeerNameFromString("01:00:00:00:02:00")
+	peer2name, _ = mesh.PeerNameFromString("02:00:00:00:02:00")
+	peer3name, _ = mesh.PeerNameFromString("03:00:00:00:02:00")
 
 	start, end    = ParseIP("10.0.0.0"), ParseIP("10.0.0.255")
 	dot10, dot245 = ParseIP("10.0.0.10"), ParseIP("10.0.0.245")
@@ -351,7 +351,7 @@ func TestGossip(t *testing.T) {
 	assertRing(ring2, []*entry{{Token: start, Peer: peer1name, Free: 255}})
 }
 
-func assertPeersWithSpace(t *testing.T, ring *Ring, start, end address.Address, expected int) []router.PeerName {
+func assertPeersWithSpace(t *testing.T, ring *Ring, start, end address.Address, expected int) []mesh.PeerName {
 	peers := ring.ChoosePeersToAskForSpace(start, end)
 	require.Equal(t, expected, len(peers))
 	return peers
@@ -375,7 +375,7 @@ func TestFindFree(t *testing.T) {
 	ring1.assertInvariants()
 
 	// We should return others
-	var peers []router.PeerName
+	var peers []mesh.PeerName
 
 	ring1.Entries = []*entry{{Token: start, Peer: peer2name, Free: 1}}
 	peers = assertPeersWithSpace(t, ring1, start, end, 1)
@@ -493,7 +493,7 @@ func TestOwner(t *testing.T) {
 	require.True(t, ring1.Contains(start), "start should be in ring")
 	require.False(t, ring1.Contains(end), "end should not be in ring")
 
-	require.Equal(t, router.UnknownPeerName, ring1.Owner(start))
+	require.Equal(t, mesh.UnknownPeerName, ring1.Owner(start))
 
 	ring1.ClaimItAll()
 	ring1.GrantRangeToHost(middle, end, peer2name)
@@ -517,9 +517,9 @@ func TestFuzzRing(t *testing.T) {
 		iterations = 1000
 	)
 
-	peers := make([]router.PeerName, numPeers)
+	peers := make([]mesh.PeerName, numPeers)
 	for i := 0; i < numPeers; i++ {
-		peer, _ := router.PeerNameFromString(fmt.Sprintf("%02d:00:00:00:02:00", i))
+		peer, _ := mesh.PeerNameFromString(fmt.Sprintf("%02d:00:00:00:02:00", i))
 		peers[i] = peer
 	}
 
@@ -601,13 +601,13 @@ func TestFuzzRingHard(t *testing.T) {
 	var (
 		numPeers   = 100
 		iterations = 3000
-		peers      []router.PeerName
+		peers      []mesh.PeerName
 		rings      []*Ring
 		nextPeerID = 0
 	)
 
 	addPeer := func() {
-		peer, _ := router.PeerNameFromString(fmt.Sprintf("%02d:%02d:00:00:00:00", nextPeerID/10, nextPeerID%10))
+		peer, _ := mesh.PeerNameFromString(fmt.Sprintf("%02d:%02d:00:00:00:00", nextPeerID/10, nextPeerID%10))
 		common.Log.Debugf("%s: Adding peer", peer)
 		nextPeerID++
 		peers = append(peers, peer)
@@ -620,7 +620,7 @@ func TestFuzzRingHard(t *testing.T) {
 
 	rings[0].ClaimItAll()
 
-	randomPeer := func(exclude int) (int, router.PeerName, *Ring) {
+	randomPeer := func(exclude int) (int, mesh.PeerName, *Ring) {
 		var peerIndex int
 		if exclude >= 0 {
 			peerIndex = rand.Intn(len(peers) - 1)
@@ -729,7 +729,7 @@ func TestFuzzRingHard(t *testing.T) {
 }
 
 func (r *Ring) ClaimItAll() {
-	r.ClaimForPeers([]router.PeerName{r.Peer})
+	r.ClaimForPeers([]mesh.PeerName{r.Peer})
 }
 
 func (es entries) String() string {

ipam/testutils_test.go

@@ -8,13 +8,13 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/require"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 	"github.com/weaveworks/weave/testing/gossip"
 )
 
 type mockMessage struct {
-	dst     router.PeerName
+	dst     mesh.PeerName
 	msgType byte
 	buf     []byte
 }
@@ -48,13 +48,13 @@ func (m *mockGossipComms) String() string {
 // that the contents of messages are never re-ordered.  Which, for instance,
 // requires they are not based off iterating through a map.
 
-func (m *mockGossipComms) GossipBroadcast(update router.GossipData) error {
+func (m *mockGossipComms) GossipBroadcast(update mesh.GossipData) error {
 	m.Lock()
 	defer m.Unlock()
 	buf := []byte{}
 	if len(m.messages) == 0 {
 		require.FailNow(m, fmt.Sprintf("%s: Gossip broadcast message unexpected: \n%x", m.name, buf))
-	} else if msg := m.messages[0]; msg.dst != router.UnknownPeerName {
+	} else if msg := m.messages[0]; msg.dst != mesh.UnknownPeerName {
 		require.FailNow(m, fmt.Sprintf("%s: Expected Gossip message to %s but got broadcast", m.name, msg.dst))
 	} else if msg.buf != nil && !equalByteBuffer(msg.buf, buf) {
 		require.FailNow(m, fmt.Sprintf("%s: Gossip message not sent as expected: \nwant: %x\ngot : %x", m.name, msg.buf, buf))
@@ -77,12 +77,12 @@ func equalByteBuffer(a, b []byte) bool {
 	return true
 }
 
-func (m *mockGossipComms) GossipUnicast(dstPeerName router.PeerName, buf []byte) error {
+func (m *mockGossipComms) GossipUnicast(dstPeerName mesh.PeerName, buf []byte) error {
 	m.Lock()
 	defer m.Unlock()
 	if len(m.messages) == 0 {
 		require.FailNow(m, fmt.Sprintf("%s: Gossip message to %s unexpected: \n%s", m.name, dstPeerName, buf))
-	} else if msg := m.messages[0]; msg.dst == router.UnknownPeerName {
+	} else if msg := m.messages[0]; msg.dst == mesh.UnknownPeerName {
 		require.FailNow(m, fmt.Sprintf("%s: Expected Gossip broadcast message but got dest %s", m.name, dstPeerName))
 	} else if msg.dst != dstPeerName {
 		require.FailNow(m, fmt.Sprintf("%s: Expected Gossip message to %s but got dest %s", m.name, msg.dst, dstPeerName))
@@ -99,7 +99,7 @@ func (m *mockGossipComms) GossipUnicast(dstPeerName router.PeerName, buf []byte)
 
 func ExpectMessage(alloc *Allocator, dst string, msgType byte, buf []byte) {
 	m := alloc.gossip.(*mockGossipComms)
-	dstPeerName, _ := router.PeerNameFromString(dst)
+	dstPeerName, _ := mesh.PeerNameFromString(dst)
 	m.Lock()
 	m.messages = append(m.messages, mockMessage{dstPeerName, msgType, buf})
 	m.Unlock()
@@ -108,7 +108,7 @@ func ExpectMessage(alloc *Allocator, dst string, msgType byte, buf []byte) {
 func ExpectBroadcastMessage(alloc *Allocator, buf []byte) {
 	m := alloc.gossip.(*mockGossipComms)
 	m.Lock()
-	m.messages = append(m.messages, mockMessage{router.UnknownPeerName, 0, buf})
+	m.messages = append(m.messages, mockMessage{mesh.UnknownPeerName, 0, buf})
 	m.Unlock()
 }
 
@@ -124,7 +124,7 @@ func CheckAllExpectedMessagesSent(allocs ...*Allocator) {
 }
 
 func makeAllocator(name string, cidrStr string, quorum uint) (*Allocator, address.Range) {
-	peername, err := router.PeerNameFromString(name)
+	peername, err := mesh.PeerNameFromString(name)
 	if err != nil {
 		panic(err)
 	}
@@ -134,8 +134,8 @@ func makeAllocator(name string, cidrStr string, quorum uint) (*Allocator, addres
 		panic(err)
 	}
 
-	alloc := NewAllocator(peername, router.PeerUID(rand.Int63()),
-		"nick-"+name, cidr.Range(), quorum, func(router.PeerName) bool { return true })
+	alloc := NewAllocator(peername, mesh.PeerUID(rand.Int63()),
+		"nick-"+name, cidr.Range(), quorum, func(mesh.PeerName) bool { return true })
 
 	return alloc, cidr.HostRange()
 }
@@ -149,7 +149,7 @@ func makeAllocatorWithMockGossip(t *testing.T, name string, universeCIDR string,
 }
 
 func (alloc *Allocator) claimRingForTesting(allocs ...*Allocator) {
-	peers := []router.PeerName{alloc.ourName}
+	peers := []mesh.PeerName{alloc.ourName}
 	for _, alloc2 := range allocs {
 		peers = append(peers, alloc2.ourName)
 	}

mesh/connection.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/connection_maker.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/gossip.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/gossip_channel.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"bytes"

mesh/gossip_test.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/local_peer.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/mocks_test.go

@@ -3,7 +3,7 @@
 // It supplies some mock implementations to other unit tests, and is
 // named "...test.go" so it is only compiled under `go test`.
 
-package router
+package mesh
 
 import (
 	"fmt"

mesh/overlay.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"net"

mesh/peer.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"crypto/rand"

mesh/peer_name_hash.go

@@ -3,7 +3,7 @@
 // Let peer names be sha256 hashes...of anything (as long as it's
 // unique).
 
-package router
+package mesh
 
 import (
 	"crypto/sha256"

mesh/peer_name_mac.go

@@ -15,7 +15,7 @@
 // name. In particular it doesn't actually have to be the MAC of, say,
 // the network interface the peer is sniffing on.
 
-package router
+package mesh
 
 import (
 	"net"
@@ -56,3 +56,20 @@ func (name PeerName) Bin() []byte {
 func (name PeerName) String() string {
 	return intmac(uint64(name)).String()
 }
+
+func macint(mac net.HardwareAddr) (r uint64) {
+	for _, b := range mac {
+		r <<= 8
+		r |= uint64(b)
+	}
+	return
+}
+
+func intmac(key uint64) (r net.HardwareAddr) {
+	r = make([]byte, 6)
+	for i := 5; i >= 0; i-- {
+		r[i] = byte(key)
+		key >>= 8
+	}
+	return
+}

mesh/peers.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"bytes"

mesh/peers_test.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/protocol.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"bytes"

mesh/protocol_crypto.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"crypto/rand"

mesh/protocol_test.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"io"

mesh/router.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/routes.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"math"

mesh/status.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"fmt"

mesh/surrogate_gossiper.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 type SurrogateGossipData struct {
 	messages [][]byte

mesh/token_bucket.go

@@ -1,4 +1,4 @@
-package router
+package mesh
 
 import (
 	"time"

nameserver/dns_test.go

@@ -11,14 +11,14 @@ import (
 	"github.com/miekg/dns"
 	"github.com/stretchr/testify/require"
 
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 func startServer(t *testing.T, upstream *dns.ClientConfig) (*DNSServer, *Nameserver, int, int) {
-	peername, err := router.PeerNameFromString("00:00:00:02:00:00")
+	peername, err := mesh.PeerNameFromString("00:00:00:02:00:00")
 	require.Nil(t, err)
-	nameserver := New(peername, "", func(router.PeerName) bool { return true })
+	nameserver := New(peername, "", func(mesh.PeerName) bool { return true })
 	dnsserver, err := NewDNSServer(nameserver, "weave.local.", "0.0.0.0:0", "", 30, 5*time.Second)
 	require.Nil(t, err)
 	udpPort := dnsserver.servers[0].PacketConn.LocalAddr().(*net.UDPAddr).Port
@@ -39,7 +39,7 @@ func TestTruncation(t *testing.T) {
 	addrs := []address.Address{}
 	for i := address.Address(0); i < 100; i++ {
 		addrs = append(addrs, i)
-		nameserver.AddEntry("foo.weave.local.", "", router.UnknownPeerName, i)
+		nameserver.AddEntry("foo.weave.local.", "", mesh.UnknownPeerName, i)
 	}
 
 	doRequest := func(client *dns.Client, request *dns.Msg, port int, expectedErr error) *dns.Msg {

nameserver/entry.go

@@ -8,15 +8,15 @@ import (
 	"strings"
 	"time"
 
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 var now = func() int64 { return time.Now().Unix() }
 
 type Entry struct {
 	ContainerID string
-	Origin      router.PeerName
+	Origin      mesh.PeerName
 	Addr        address.Address
 	Hostname    string // as supplied
 	lHostname   string // lowercased (not exported, so not encoded by gob)
@@ -128,7 +128,7 @@ func (es *Entries) checkAndPanic() *Entries {
 	return es
 }
 
-func (es *Entries) add(hostname, containerid string, origin router.PeerName, addr address.Address) Entry {
+func (es *Entries) add(hostname, containerid string, origin mesh.PeerName, addr address.Address) Entry {
 	defer es.checkAndPanic().checkAndPanic()
 
 	entry := Entry{Hostname: hostname, lHostname: strings.ToLower(hostname),
@@ -176,7 +176,7 @@ func (es *Entries) merge(incoming Entries) Entries {
 }
 
 // f returning true means keep the entry.
-func (es *Entries) tombstone(ourname router.PeerName, f func(*Entry) bool) Entries {
+func (es *Entries) tombstone(ourname mesh.PeerName, f func(*Entry) bool) Entries {
 	defer es.checkAndPanic().checkAndPanic()
 
 	tombstoned := Entries{}
@@ -245,7 +245,7 @@ type GossipData struct {
 	Entries
 }
 
-func (g *GossipData) Merge(o router.GossipData) {
+func (g *GossipData) Merge(o mesh.GossipData) {
 	other := o.(*GossipData)
 	g.Entries.merge(other.Entries)
 	if g.Timestamp < other.Timestamp {

nameserver/entry_test.go

@@ -5,8 +5,8 @@ import (
 
 	"github.com/stretchr/testify/require"
 
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 func l(es Entries) Entries {
@@ -28,21 +28,21 @@ func TestAdd(t *testing.T) {
 	now = func() int64 { return 1234 }
 
 	entries := Entries{}
-	entries.add("A", "", router.UnknownPeerName, address.Address(0))
+	entries.add("A", "", mesh.UnknownPeerName, address.Address(0))
 	expected := l(Entries{
-		Entry{Hostname: "A", Origin: router.UnknownPeerName, Addr: address.Address(0)},
+		Entry{Hostname: "A", Origin: mesh.UnknownPeerName, Addr: address.Address(0)},
 	})
 	require.Equal(t, entries, expected)
 
-	entries.tombstone(router.UnknownPeerName, func(e *Entry) bool { return e.Hostname == "A" })
+	entries.tombstone(mesh.UnknownPeerName, func(e *Entry) bool { return e.Hostname == "A" })
 	expected = l(Entries{
-		Entry{Hostname: "A", Origin: router.UnknownPeerName, Addr: address.Address(0), Version: 1, Tombstone: 1234},
+		Entry{Hostname: "A", Origin: mesh.UnknownPeerName, Addr: address.Address(0), Version: 1, Tombstone: 1234},
 	})
 	require.Equal(t, entries, expected)
 
-	entries.add("A", "", router.UnknownPeerName, address.Address(0))
+	entries.add("A", "", mesh.UnknownPeerName, address.Address(0))
 	expected = l(Entries{
-		Entry{Hostname: "A", Origin: router.UnknownPeerName, Addr: address.Address(0), Version: 2},
+		Entry{Hostname: "A", Origin: mesh.UnknownPeerName, Addr: address.Address(0), Version: 2},
 	})
 	require.Equal(t, entries, expected)
 }
@@ -78,7 +78,7 @@ func TestTombstone(t *testing.T) {
 
 	es := makeEntries("AB")
 
-	es.tombstone(router.UnknownPeerName, func(e *Entry) bool {
+	es.tombstone(mesh.UnknownPeerName, func(e *Entry) bool {
 		return e.Hostname == "B"
 	})
 	expected := l(Entries{

nameserver/nameserver.go

@@ -8,8 +8,8 @@ import (
 	"github.com/miekg/dns"
 
 	. "github.com/weaveworks/weave/common"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 )
 
 const (
@@ -34,15 +34,15 @@ const (
 // - Update is O(n) for now
 type Nameserver struct {
 	sync.RWMutex
-	ourName     router.PeerName
+	ourName     mesh.PeerName
 	domain      string
-	gossip      router.Gossip
+	gossip      mesh.Gossip
 	entries     Entries
-	isKnownPeer func(router.PeerName) bool
+	isKnownPeer func(mesh.PeerName) bool
 	quit        chan struct{}
 }
 
-func New(ourName router.PeerName, domain string, isKnownPeer func(router.PeerName) bool) *Nameserver {
+func New(ourName mesh.PeerName, domain string, isKnownPeer func(mesh.PeerName) bool) *Nameserver {
 	return &Nameserver{
 		ourName:     ourName,
 		domain:      dns.Fqdn(domain),
@@ -51,7 +51,7 @@ func New(ourName router.PeerName, domain string, isKnownPeer func(router.PeerNam
 	}
 }
 
-func (n *Nameserver) SetGossip(gossip router.Gossip) {
+func (n *Nameserver) SetGossip(gossip mesh.Gossip) {
 	n.gossip = gossip
 }
 
@@ -83,7 +83,7 @@ func (n *Nameserver) broadcastEntries(es ...Entry) error {
 	return nil
 }
 
-func (n *Nameserver) AddEntry(hostname, containerid string, origin router.PeerName, addr address.Address) error {
+func (n *Nameserver) AddEntry(hostname, containerid string, origin mesh.PeerName, addr address.Address) error {
 	n.infof("adding entry %s -> %s", hostname, addr.String())
 	n.Lock()
 	entry := n.entries.add(hostname, containerid, origin, addr)
@@ -140,7 +140,7 @@ func (n *Nameserver) ContainerDied(ident string) {
 	}
 }
 
-func (n *Nameserver) PeerGone(peer router.PeerName) {
+func (n *Nameserver) PeerGone(peer mesh.PeerName) {
 	n.infof("peer %s gone", peer.String())
 	n.Lock()
 	defer n.Unlock()
@@ -181,7 +181,7 @@ func (n *Nameserver) deleteTombstones() {
 	})
 }
 
-func (n *Nameserver) Gossip() router.GossipData {
+func (n *Nameserver) Gossip() mesh.GossipData {
 	n.RLock()
 	defer n.RUnlock()
 	gossip := &GossipData{
@@ -192,11 +192,11 @@ func (n *Nameserver) Gossip() router.GossipData {
 	return gossip
 }
 
-func (n *Nameserver) OnGossipUnicast(sender router.PeerName, msg []byte) error {
+func (n *Nameserver) OnGossipUnicast(sender mesh.PeerName, msg []byte) error {
 	return nil
 }
 
-func (n *Nameserver) receiveGossip(msg []byte) (router.GossipData, router.GossipData, error) {
+func (n *Nameserver) receiveGossip(msg []byte) (mesh.GossipData, mesh.GossipData, error) {
 	var gossip GossipData
 	if err := gossip.Decode(msg); err != nil {
 		return nil, nil, err
@@ -221,14 +221,14 @@ func (n *Nameserver) receiveGossip(msg []byte) (router.GossipData, router.Gossip
 
 // merge received data into state and return "everything new I've
 // just learnt", or nil if nothing in the received data was new
-func (n *Nameserver) OnGossip(msg []byte) (router.GossipData, error) {
+func (n *Nameserver) OnGossip(msg []byte) (mesh.GossipData, error) {
 	newEntries, _, err := n.receiveGossip(msg)
 	return newEntries, err
 }
 
 // merge received data into state and return a representation of
 // the received data, for further propagation
-func (n *Nameserver) OnGossipBroadcast(_ router.PeerName, msg []byte) (router.GossipData, error) {
+func (n *Nameserver) OnGossipBroadcast(_ mesh.PeerName, msg []byte) (mesh.GossipData, error) {
 	_, entries, err := n.receiveGossip(msg)
 	return entries, err
 }

nameserver/nameserver_test.go

@@ -11,14 +11,14 @@ import (
 
 	"github.com/stretchr/testify/require"
 
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/net/address"
-	"github.com/weaveworks/weave/router"
 	wt "github.com/weaveworks/weave/testing"
 	"github.com/weaveworks/weave/testing/gossip"
 )
 
-func makeNameserver(name router.PeerName) *Nameserver {
-	return New(name, "", func(router.PeerName) bool { return true })
+func makeNameserver(name mesh.PeerName) *Nameserver {
+	return New(name, "", func(mesh.PeerName) bool { return true })
 }
 
 func makeNetwork(size int) ([]*Nameserver, *gossip.TestRouter) {
@@ -26,7 +26,7 @@ func makeNetwork(size int) ([]*Nameserver, *gossip.TestRouter) {
 	nameservers := make([]*Nameserver, size)
 
 	for i := 0; i < size; i++ {
-		name, _ := router.PeerNameFromString(fmt.Sprintf("%02d:00:00:02:00:00", i))
+		name, _ := mesh.PeerNameFromString(fmt.Sprintf("%02d:00:00:02:00:00", i))
 		nameserver := makeNameserver(name)
 		nameserver.SetGossip(gossipRouter.Connect(nameserver.ourName, nameserver))
 		nameserver.Start()
@@ -44,7 +44,7 @@ func stopNetwork(nameservers []*Nameserver, grouter *gossip.TestRouter) {
 }
 
 type pair struct {
-	origin router.PeerName
+	origin mesh.PeerName
 	addr   address.Address
 }
 
@@ -91,7 +91,7 @@ func testNameservers(t *testing.T) {
 	badNameservers := nameservers[25:]
 	// This subset will remain well-connected, and we will deal mainly with them
 	nameservers = nameservers[:25]
-	nameserversByName := map[router.PeerName]*Nameserver{}
+	nameserversByName := map[mesh.PeerName]*Nameserver{}
 	for _, n := range nameservers {
 		nameserversByName[n.ourName] = n
 	}
@@ -226,7 +226,7 @@ func testNameservers(t *testing.T) {
 }
 
 func TestContainerAndPeerDeath(t *testing.T) {
-	peername, err := router.PeerNameFromString("00:00:00:02:00:00")
+	peername, err := mesh.PeerNameFromString("00:00:00:02:00:00")
 	require.Nil(t, err)
 	nameserver := makeNameserver(peername)
 
@@ -250,7 +250,7 @@ func TestTombstoneDeletion(t *testing.T) {
 	defer func() { now = oldNow }()
 	now = func() int64 { return 1234 }
 
-	peername, err := router.PeerNameFromString("00:00:00:02:00:00")
+	peername, err := mesh.PeerNameFromString("00:00:00:02:00:00")
 	require.Nil(t, err)
 	nameserver := makeNameserver(peername)
 

prog/weaver/http.go

@@ -6,6 +6,7 @@ import (
 	"github.com/gorilla/mux"
 	. "github.com/weaveworks/weave/common"
 	"github.com/weaveworks/weave/ipam"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/nameserver"
 	"github.com/weaveworks/weave/net/address"
 	weave "github.com/weaveworks/weave/router"
@@ -24,14 +25,14 @@ var rootTemplate = template.New("root").Funcs(map[string]interface{}{
 		}
 		return count
 	},
-	"printConnectionCounts": func(conns []weave.LocalConnectionStatus) string {
+	"printConnectionCounts": func(conns []mesh.LocalConnectionStatus) string {
 		counts := make(map[string]int)
 		for _, conn := range conns {
 			counts[conn.State]++
 		}
 		return printCounts(counts, []string{"established", "pending", "retrying", "failed", "connecting"})
 	},
-	"printPeerConnectionCounts": func(peers []weave.PeerStatus) string {
+	"printPeerConnectionCounts": func(peers []mesh.PeerStatus) string {
 		counts := make(map[string]int)
 		for _, peer := range peers {
 			for _, conn := range peer.Connections {

prog/weaver/main.go

@@ -17,6 +17,7 @@ import (
 	. "github.com/weaveworks/weave/common"
 	"github.com/weaveworks/weave/common/docker"
 	"github.com/weaveworks/weave/ipam"
+	"github.com/weaveworks/weave/mesh"
 	"github.com/weaveworks/weave/nameserver"
 	weavenet "github.com/weaveworks/weave/net"
 	"github.com/weaveworks/weave/net/address"
@@ -41,7 +42,7 @@ func main() {
 		deleteDatapath       bool
 		addDatapathInterface string
 
-		config                    weave.Config
+		config                    mesh.Config
 		networkConfig             weave.NetworkConfig
 		protocolMinVersion        int
 		ifaceName                 string
@@ -74,8 +75,8 @@ func main() {
 	mflag.BoolVar(&deleteDatapath, []string{"-delete-datapath"}, false, "delete ODP datapath and exit")
 	mflag.StringVar(&addDatapathInterface, []string{"-add-datapath-iface"}, "", "add a network interface to the ODP datapath and exit")
 
-	mflag.IntVar(&config.Port, []string{"#port", "-port"}, weave.Port, "router port")
-	mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, weave.ProtocolMinVersion, "minimum weave protocol version")
+	mflag.IntVar(&config.Port, []string{"#port", "-port"}, mesh.Port, "router port")
+	mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, mesh.ProtocolMinVersion, "minimum weave protocol version")
 	mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to capture/inject from (disabled if blank)")
 	mflag.StringVar(&routerName, []string{"#name", "-name"}, "", "name of router (defaults to MAC of interface)")
 	mflag.StringVar(&nickName, []string{"#nickname", "-nickname"}, "", "nickname of peer (defaults to hostname)")
@@ -146,8 +147,8 @@ func main() {
 	Log.Println("Command line options:", options())
 	Log.Println("Command line peers:", peers)
 
-	if protocolMinVersion < weave.ProtocolMinVersion || protocolMinVersion > weave.ProtocolMaxVersion {
-		Log.Fatalf("--min-protocol-version must be in range [%d,%d]", weave.ProtocolMinVersion, weave.ProtocolMaxVersion)
+	if protocolMinVersion < mesh.ProtocolMinVersion || protocolMinVersion > mesh.ProtocolMaxVersion {
+		Log.Fatalf("--min-protocol-version must be in range [%d,%d]", mesh.ProtocolMinVersion, mesh.ProtocolMaxVersion)
 	}
 	config.ProtocolMinVersion = byte(protocolMinVersion)
 
@@ -212,7 +213,7 @@ func main() {
 		routerName = iface.HardwareAddr.String()
 	}
 
-	name, err := weave.PeerNameFromUserInput(routerName)
+	name, err := mesh.PeerNameFromUserInput(routerName)
 	checkFatal(err)
 
 	if nickName == "" {
@@ -253,7 +254,7 @@ func main() {
 			}
 		}
 	}
-	isKnownPeer := func(name weave.PeerName) bool {
+	isKnownPeer := func(name mesh.PeerName) bool {
 		return router.Peers.Fetch(name) != nil
 	}
 	var allocator *ipam.Allocator
@@ -271,7 +272,7 @@ func main() {
 	)
 	if !noDNS {
 		ns = nameserver.New(router.Ourself.Peer.Name, dnsDomain, isKnownPeer)
-		router.Peers.OnGC(func(peer *weave.Peer) { ns.PeerGone(peer.Name) })
+		router.Peers.OnGC(func(peer *mesh.Peer) { ns.PeerGone(peer.Name) })
 		ns.SetGossip(router.NewGossip("nameserver", ns))
 		observeContainers(ns)
 		ns.Start()
@@ -366,7 +367,7 @@ func parseAndCheckCIDR(cidrStr string) address.CIDR {
 	return cidr
 }
 
-func createAllocator(router *weave.Router, ipRangeStr string, defaultSubnetStr string, quorum uint, isKnownPeer func(weave.PeerName) bool) (*ipam.Allocator, address.CIDR) {
+func createAllocator(router *mesh.Router, ipRangeStr string, defaultSubnetStr string, quorum uint, isKnownPeer func(mesh.PeerName) bool) (*ipam.Allocator, address.CIDR) {
 	ipRange := parseAndCheckCIDR(ipRangeStr)
 	defaultSubnet := ipRange
 	if defaultSubnetStr != "" {

router/fastdp.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/weaveworks/go-odp/odp"
+	"github.com/weaveworks/weave/mesh"
 )
 
 // The virtual bridge accepts packets from ODP vports and the router
@@ -40,8 +41,8 @@ type FastDatapath struct {
 	dp               odp.DatapathHandle
 	deleteFlowsCount uint64
 	missHandlers     map[odp.VportID]missHandler
-	localPeer        *Peer
-	peers            *Peers
+	localPeer        *mesh.Peer
+	peers            *mesh.Peers
 	overlayConsumer  OverlayConsumer
 
 	// Bridge state: How to send to the given bridge port
@@ -62,7 +63,7 @@ type FastDatapath struct {
 	dec *EthernetDecoder
 
 	// forwarders by remote peer
-	forwarders map[PeerName]*fastDatapathForwarder
+	forwarders map[mesh.PeerName]*fastDatapathForwarder
 }
 
 type FastDatapathConfig struct {
@@ -105,7 +106,7 @@ func NewFastDatapath(config FastDatapathConfig) (*FastDatapath, error) {
 		sendToMAC:     make(map[MAC]bridgeSender),
 		seenMACs:      make(map[MAC]struct{}),
 		vxlanVportIDs: make(map[int]odp.VportID),
-		forwarders:    make(map[PeerName]*fastDatapathForwarder),
+		forwarders:    make(map[mesh.PeerName]*fastDatapathForwarder),
 	}
 
 	if err := fastdp.deleteVxlanVports(); err != nil {
@@ -385,7 +386,7 @@ func (fastdp fastDatapathOverlay) Diagnostics() interface{} {
 	}
 }
 
-func (fastdp fastDatapathOverlay) StartConsumingPackets(localPeer *Peer, peers *Peers, consumer OverlayConsumer) error {
+func (fastdp fastDatapathOverlay) StartConsumingPackets(localPeer *mesh.Peer, peers *mesh.Peers, consumer OverlayConsumer) error {
 	fastdp.lock.Lock()
 	defer fastdp.lock.Unlock()
 
@@ -460,17 +461,17 @@ func (fastdp *FastDatapath) getVxlanVportID(udpPort int) (odp.VportID, error) {
 	return vxlanVportID, nil
 }
 
-func (fastdp *FastDatapath) extractPeers(tunnelID [8]byte) (*Peer, *Peer) {
+func (fastdp *FastDatapath) extractPeers(tunnelID [8]byte) (*mesh.Peer, *mesh.Peer) {
 	vni := binary.BigEndian.Uint64(tunnelID[:])
-	srcPeer := fastdp.peers.FetchByShortID(PeerShortID(vni & 0xfff))
-	dstPeer := fastdp.peers.FetchByShortID(PeerShortID((vni >> 12) & 0xfff))
+	srcPeer := fastdp.peers.FetchByShortID(mesh.PeerShortID(vni & 0xfff))
+	dstPeer := fastdp.peers.FetchByShortID(mesh.PeerShortID((vni >> 12) & 0xfff))
 	return srcPeer, dstPeer
 }
 
 type vxlanSpecialPacketFlowOp struct {
 	NonDiscardingFlowOp
 	fastdp  *FastDatapath
-	srcPeer *Peer
+	srcPeer *mesh.Peer
 	sender  *net.UDPAddr
 }
 
@@ -486,7 +487,7 @@ func (op vxlanSpecialPacketFlowOp) Process(frame []byte, dec *EthernetDecoder, b
 
 type fastDatapathForwarder struct {
 	fastdp         *FastDatapath
-	remotePeer     *Peer
+	remotePeer     *mesh.Peer
 	localIP        [4]byte
 	sendControlMsg func(byte, []byte) error
 	connUID        uint64
@@ -506,7 +507,7 @@ type fastDatapathForwarder struct {
 	errorChan       chan error
 }
 
-func (fastdp fastDatapathOverlay) PrepareConnection(params OverlayConnectionParams) (OverlayConnection, error) {
+func (fastdp fastDatapathOverlay) PrepareConnection(params mesh.OverlayConnectionParams) (mesh.OverlayConnection, error) {
 	if params.SessionKey != nil {
 		// No encryption suport in fastdp.  The weaver main.go
 		// is responsible for ensuring this doesn't happen.
@@ -794,7 +795,7 @@ func (fwd *fastDatapathForwarder) Stop() {
 	}
 }
 
-func (fastdp *FastDatapath) addForwarder(peer PeerName, fwd *fastDatapathForwarder) {
+func (fastdp *FastDatapath) addForwarder(peer mesh.PeerName, fwd *fastDatapathForwarder) {
 	fastdp.lock.Lock()
 	defer fastdp.lock.Unlock()
 
@@ -803,7 +804,7 @@ func (fastdp *FastDatapath) addForwarder(peer PeerName, fwd *fastDatapathForward
 	fastdp.forwarders[peer] = fwd
 }
 
-func (fastdp *FastDatapath) removeForwarder(peer PeerName, fwd *fastDatapathForwarder) {
+func (fastdp *FastDatapath) removeForwarder(peer mesh.PeerName, fwd *fastDatapathForwarder) {
 	fastdp.lock.Lock()
 	defer fastdp.lock.Unlock()
 	if fastdp.forwarders[peer] == fwd {

router/flow.go

@@ -1,6 +1,10 @@
 package router
 
-import "net"
+import (
+	"net"
+
+	"github.com/weaveworks/weave/mesh"
+)
 
 // Just enough flow machinery for the weave router
 
@@ -16,8 +20,8 @@ type PacketKey struct {
 }
 
 type ForwardPacketKey struct {
-	SrcPeer *Peer
-	DstPeer *Peer
+	SrcPeer *mesh.Peer
+	DstPeer *mesh.Peer
 	PacketKey
 }
 

router/http.go

@@ -2,12 +2,13 @@ package router
 
 import (
 	"fmt"
+	"net/http"
+
 	"github.com/gorilla/mux"
 	"github.com/weaveworks/weave/common"
-	"net/http"
 )
 
-func (router *Router) HandleHTTP(muxRouter *mux.Router) {
+func (router *NetworkRouter) HandleHTTP(muxRouter *mux.Router) {
 
 	muxRouter.Methods("POST").Path("/connect").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if err := r.ParseForm(); err != nil {

router/mac_cache.go

@@ -4,11 +4,13 @@ import (
 	"net"
 	"sync"
 	"time"
+
+	"github.com/weaveworks/weave/mesh"
 )
 
 type MacCacheEntry struct {
 	lastSeen time.Time
-	peer     *Peer
+	peer     *mesh.Peer
 }
 
 type MacCache struct {
@@ -16,10 +18,10 @@ type MacCache struct {
 	table       map[uint64]*MacCacheEntry
 	maxAge      time.Duration
 	expiryTimer *time.Timer
-	onExpiry    func(net.HardwareAddr, *Peer)
+	onExpiry    func(net.HardwareAddr, *mesh.Peer)
 }
 
-func NewMacCache(maxAge time.Duration, onExpiry func(net.HardwareAddr, *Peer)) *MacCache {
+func NewMacCache(maxAge time.Duration, onExpiry func(net.HardwareAddr, *mesh.Peer)) *MacCache {
 	cache := &MacCache{
 		table:    make(map[uint64]*MacCacheEntry),
 		maxAge:   maxAge,
@@ -28,7 +30,7 @@ func NewMacCache(maxAge time.Duration, onExpiry func(net.HardwareAddr, *Peer)) *
 	return cache
 }
 
-func (cache *MacCache) add(mac net.HardwareAddr, peer *Peer, force bool) (bool, *Peer) {
+func (cache *MacCache) add(mac net.HardwareAddr, peer *mesh.Peer, force bool) (bool, *mesh.Peer) {
 	key := macint(mac)
 	now := time.Now()
 
@@ -64,15 +66,15 @@ func (cache *MacCache) add(mac net.HardwareAddr, peer *Peer, force bool) (bool,
 	return false, nil
 }
 
-func (cache *MacCache) Add(mac net.HardwareAddr, peer *Peer) (bool, *Peer) {
+func (cache *MacCache) Add(mac net.HardwareAddr, peer *mesh.Peer) (bool, *mesh.Peer) {
 	return cache.add(mac, peer, false)
 }
 
-func (cache *MacCache) AddForced(mac net.HardwareAddr, peer *Peer) (bool, *Peer) {
+func (cache *MacCache) AddForced(mac net.HardwareAddr, peer *mesh.Peer) (bool, *mesh.Peer) {
 	return cache.add(mac, peer, true)
 }
 
-func (cache *MacCache) Lookup(mac net.HardwareAddr) *Peer {
+func (cache *MacCache) Lookup(mac net.HardwareAddr) *mesh.Peer {
 	key := macint(mac)
 	cache.RLock()
 	defer cache.RUnlock()
@@ -83,7 +85,7 @@ func (cache *MacCache) Lookup(mac net.HardwareAddr) *Peer {
 	return entry.peer
 }
 
-func (cache *MacCache) Delete(peer *Peer) bool {
+func (cache *MacCache) Delete(peer *mesh.Peer) bool {
 	found := false
 	cache.Lock()
 	defer cache.Unlock()

router/network_overlay.go

@@ -1,8 +1,12 @@
 package router
 
+import (
+	"github.com/weaveworks/weave/mesh"
+)
+
 // Interface to overlay network packet handling
 type NetworkOverlay interface {
-	Overlay
+	mesh.Overlay
 
 	// The routes have changed, so any cached information should
 	// be discarded.
@@ -12,7 +16,7 @@ type NetworkOverlay interface {
 	InvalidateShortIDs()
 
 	// Start consuming forwarded packets.
-	StartConsumingPackets(*Peer, *Peers, OverlayConsumer) error
+	StartConsumingPackets(*mesh.Peer, *mesh.Peers, OverlayConsumer) error
 }
 
 // When a consumer is called, the decoder will already have been used
@@ -21,7 +25,7 @@ type OverlayConsumer func(ForwardPacketKey) FlowOp
 
 // All of the machinery to forward packets to a particular peer
 type OverlayForwarder interface {
-	OverlayConnection
+	mesh.OverlayConnection
 	// Forward a packet across the connection.  May be called as soon
 	// as the overlay connection is created, in particular before
 	// Confirm().  The return value nil means the key could not be
@@ -29,7 +33,7 @@ type OverlayForwarder interface {
 	Forward(ForwardPacketKey) FlowOp
 }
 
-type NullNetworkOverlay struct{ NullOverlay }
+type NullNetworkOverlay struct{ mesh.NullOverlay }
 
 func (NullNetworkOverlay) InvalidateRoutes() {
 }
@@ -37,7 +41,7 @@ func (NullNetworkOverlay) InvalidateRoutes() {
 func (NullNetworkOverlay) InvalidateShortIDs() {
 }
 
-func (NullNetworkOverlay) StartConsumingPackets(*Peer, *Peers, OverlayConsumer) error {
+func (NullNetworkOverlay) StartConsumingPackets(*mesh.Peer, *mesh.Peers, OverlayConsumer) error {
 	return nil
 }
 

router/network_router.go

@@ -1,21 +1,34 @@
 package router
 
 import (
+	"math"
 	"net"
 	"time"
+
+	"github.com/weaveworks/weave/common"
+	"github.com/weaveworks/weave/mesh"
 )
 
 const (
+	ChannelSize         = 16
 	MaxUDPPacketSize    = 65535
 	FastHeartbeat       = 500 * time.Millisecond
 	SlowHeartbeat       = 10 * time.Second
 	MaxMissedHeartbeats = 6
 	HeartbeatTimeout    = MaxMissedHeartbeats * SlowHeartbeat
+	MaxDuration         = time.Duration(math.MaxInt64)
+	NameSize            = mesh.NameSize
 	// should be greater than typical ARP cache expiries, i.e. > 3/2 *
 	// /proc/sys/net/ipv4_neigh/*/base_reachable_time_ms on Linux
 	macMaxAge = 10 * time.Minute
 )
 
+var (
+	log        = common.Log
+	checkFatal = common.CheckFatal
+	checkWarn  = common.CheckWarn
+)
+
 type NetworkConfig struct {
 	BufSz         int
 	PacketLogging PacketLogging
@@ -28,12 +41,12 @@ type PacketLogging interface {
 }
 
 type NetworkRouter struct {
-	*Router
+	*mesh.Router
 	NetworkConfig
 	Macs *MacCache
 }
 
-func NewNetworkRouter(config Config, networkConfig NetworkConfig, name PeerName, nickName string, overlay NetworkOverlay) *NetworkRouter {
+func NewNetworkRouter(config mesh.Config, networkConfig NetworkConfig, name mesh.PeerName, nickName string, overlay NetworkOverlay) *NetworkRouter {
 	if overlay == nil {
 		overlay = NullNetworkOverlay{}
 	}
@@ -41,14 +54,14 @@ func NewNetworkRouter(config Config, networkConfig NetworkConfig, name PeerName,
 		networkConfig.Bridge = NullBridge{}
 	}
 
-	router := &NetworkRouter{Router: NewRouter(config, name, nickName, overlay), NetworkConfig: networkConfig}
+	router := &NetworkRouter{Router: mesh.NewRouter(config, name, nickName, overlay), NetworkConfig: networkConfig}
 	router.Peers.OnInvalidateShortIDs(overlay.InvalidateShortIDs)
 	router.Routes.OnChange(overlay.InvalidateRoutes)
 	router.Macs = NewMacCache(macMaxAge,
-		func(mac net.HardwareAddr, peer *Peer) {
+		func(mac net.HardwareAddr, peer *mesh.Peer) {
 			log.Println("Expired MAC", mac, "at", peer)
 		})
-	router.Peers.OnGC(func(peer *Peer) { router.Macs.Delete(peer) })
+	router.Peers.OnGC(func(peer *mesh.Peer) { router.Macs.Delete(peer) })
 	return router
 }
 
@@ -174,10 +187,10 @@ func (router *NetworkRouter) relay(key ForwardPacketKey) FlowOp {
 		return DiscardingFlowOp{}
 	}
 
-	return conn.(*LocalConnection).OverlayConn.(OverlayForwarder).Forward(key)
+	return conn.(*mesh.LocalConnection).OverlayConn.(OverlayForwarder).Forward(key)
 }
 
-func (router *NetworkRouter) relayBroadcast(srcPeer *Peer, key PacketKey) FlowOp {
+func (router *NetworkRouter) relayBroadcast(srcPeer *mesh.Peer, key PacketKey) FlowOp {
 	nextHops := router.Routes.Broadcast(srcPeer.Name)
 	if len(nextHops) == 0 {
 		return DiscardingFlowOp{}
@@ -186,7 +199,7 @@ func (router *NetworkRouter) relayBroadcast(srcPeer *Peer, key PacketKey) FlowOp
 	op := NewMultiFlowOp(true)
 
 	for _, conn := range router.Ourself.ConnectionsTo(nextHops) {
-		op.Add(conn.(*LocalConnection).OverlayConn.(OverlayForwarder).Forward(ForwardPacketKey{
+		op.Add(conn.(*mesh.LocalConnection).OverlayConn.(OverlayForwarder).Forward(ForwardPacketKey{
 			PacketKey: key,
 			SrcPeer:   srcPeer,
 			DstPeer:   conn.Remote()}))

router/network_router_status.go

@@ -2,10 +2,12 @@ package router
 
 import (
 	"time"
+
+	"github.com/weaveworks/weave/mesh"
 )
 
 type NetworkRouterStatus struct {
-	*Status
+	*mesh.Status
 	Interface    string
 	CaptureStats map[string]int
 	MACs         []MACStatus
@@ -20,7 +22,7 @@ type MACStatus struct {
 
 func NewNetworkRouterStatus(router *NetworkRouter) *NetworkRouterStatus {
 	return &NetworkRouterStatus{
-		NewStatus(router.Router),
+		mesh.NewStatus(router.Router),
 		router.Bridge.String(),
 		router.Bridge.Stats(),
 		NewMACStatusSlice(router.Macs)}

router/overlay_switch.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"strings"
 	"sync"
+
+	"github.com/weaveworks/weave/mesh"
 )
 
 // OverlaySwitch selects which overlay to use, from a set of
@@ -60,7 +62,7 @@ func (osw *OverlaySwitch) InvalidateShortIDs() {
 	}
 }
 
-func (osw *OverlaySwitch) StartConsumingPackets(localPeer *Peer, peers *Peers, consumer OverlayConsumer) error {
+func (osw *OverlaySwitch) StartConsumingPackets(localPeer *mesh.Peer, peers *mesh.Peers, consumer OverlayConsumer) error {
 	for _, overlay := range osw.overlays {
 		if err := overlay.StartConsumingPackets(localPeer, peers, consumer); err != nil {
 			return err
@@ -76,7 +78,7 @@ type namedOverlay struct {
 
 // Find the common set of overlays supported by both sides, with the
 // ordering being the same on both sides too.
-func (osw *OverlaySwitch) commonOverlays(params OverlayConnectionParams) ([]namedOverlay, error) {
+func (osw *OverlaySwitch) commonOverlays(params mesh.OverlayConnectionParams) ([]namedOverlay, error) {
 	var peerOverlays []string
 	if overlaysFeature, present := params.Features["Overlays"]; present {
 		peerOverlays = strings.Split(overlaysFeature, " ")
@@ -118,7 +120,7 @@ func (osw *OverlaySwitch) commonOverlays(params OverlayConnectionParams) ([]name
 }
 
 type overlaySwitchForwarder struct {
-	remotePeer *Peer
+	remotePeer *mesh.Peer
 
 	lock sync.Mutex
 
@@ -160,7 +162,7 @@ type subForwarderEvent struct {
 	err error
 }
 
-func (osw *OverlaySwitch) PrepareConnection(params OverlayConnectionParams) (OverlayConnection, error) {
+func (osw *OverlaySwitch) PrepareConnection(params mesh.OverlayConnectionParams) (mesh.OverlayConnection, error) {
 	if _, present := params.Features["Overlays"]; !present && osw.compatOverlay != nil {
 		return osw.compatOverlay.PrepareConnection(params)
 	}
@@ -197,7 +199,7 @@ func (osw *OverlaySwitch) PrepareConnection(params OverlayConnectionParams) (Ove
 			xmsg[0] = byte(index)
 			xmsg[1] = tag
 			copy(xmsg[2:], msg)
-			return origSendControlMessage(ProtocolOverlayControlMsg, xmsg)
+			return origSendControlMessage(mesh.ProtocolOverlayControlMsg, xmsg)
 		}
 
 		subConn, err := overlay.PrepareConnection(params)

router/sleeve.go

@@ -18,6 +18,8 @@ import (
 
 	"github.com/google/gopacket"
 	"github.com/google/gopacket/layers"
+
+	"github.com/weaveworks/weave/mesh"
 )
 
 // This diagram explains the various arithmetic and variables related
@@ -61,21 +63,21 @@ type SleeveOverlay struct {
 
 	// These fields are set in StartConsumingPackets, and not
 	// subsequently modified
-	localPeer    *Peer
+	localPeer    *mesh.Peer
 	localPeerBin []byte
 	consumer     OverlayConsumer
-	peers        *Peers
+	peers        *mesh.Peers
 	conn         *net.UDPConn
 
 	lock       sync.Mutex
-	forwarders map[PeerName]*sleeveForwarder
+	forwarders map[mesh.PeerName]*sleeveForwarder
 }
 
 func NewSleeveOverlay(localPort int) NetworkOverlay {
 	return &SleeveOverlay{localPort: localPort}
 }
 
-func (sleeve *SleeveOverlay) StartConsumingPackets(localPeer *Peer, peers *Peers, consumer OverlayConsumer) error {
+func (sleeve *SleeveOverlay) StartConsumingPackets(localPeer *mesh.Peer, peers *mesh.Peers, consumer OverlayConsumer) error {
 	localAddr, err := net.ResolveUDPAddr("udp4", fmt.Sprint(":", sleeve.localPort))
 	if err != nil {
 		return err
@@ -114,7 +116,7 @@ func (sleeve *SleeveOverlay) StartConsumingPackets(localPeer *Peer, peers *Peers
 	sleeve.consumer = consumer
 	sleeve.peers = peers
 	sleeve.conn = conn
-	sleeve.forwarders = make(map[PeerName]*sleeveForwarder)
+	sleeve.forwarders = make(map[mesh.PeerName]*sleeveForwarder)
 	go sleeve.readUDP()
 	return nil
 }
@@ -135,19 +137,19 @@ func (*SleeveOverlay) Diagnostics() interface{} {
 	return nil
 }
 
-func (sleeve *SleeveOverlay) lookupForwarder(peer PeerName) *sleeveForwarder {
+func (sleeve *SleeveOverlay) lookupForwarder(peer mesh.PeerName) *sleeveForwarder {
 	sleeve.lock.Lock()
 	defer sleeve.lock.Unlock()
 	return sleeve.forwarders[peer]
 }
 
-func (sleeve *SleeveOverlay) addForwarder(peer PeerName, fwd *sleeveForwarder) {
+func (sleeve *SleeveOverlay) addForwarder(peer mesh.PeerName, fwd *sleeveForwarder) {
 	sleeve.lock.Lock()
 	defer sleeve.lock.Unlock()
 	sleeve.forwarders[peer] = fwd
 }
 
-func (sleeve *SleeveOverlay) removeForwarder(peer PeerName, fwd *sleeveForwarder) {
+func (sleeve *SleeveOverlay) removeForwarder(peer mesh.PeerName, fwd *sleeveForwarder) {
 	sleeve.lock.Lock()
 	defer sleeve.lock.Unlock()
 	if sleeve.forwarders[peer] == fwd {
@@ -172,7 +174,7 @@ func (sleeve *SleeveOverlay) readUDP() {
 			continue
 		}
 
-		fwdName := PeerNameFromBin(buf[:NameSize])
+		fwdName := mesh.PeerNameFromBin(buf[:NameSize])
 		fwd := sleeve.lookupForwarder(fwdName)
 		if fwd == nil {
 			continue
@@ -212,8 +214,8 @@ func (sleeve *SleeveOverlay) handleFrame(sender *net.UDPAddr, fwd *sleeveForward
 		return
 	}
 
-	srcPeer := sleeve.peers.Fetch(PeerNameFromBin(src))
-	dstPeer := sleeve.peers.Fetch(PeerNameFromBin(dst))
+	srcPeer := sleeve.peers.Fetch(mesh.PeerNameFromBin(src))
+	dstPeer := sleeve.peers.Fetch(mesh.PeerNameFromBin(dst))
 	if srcPeer == nil || dstPeer == nil {
 		return
 	}
@@ -240,7 +242,7 @@ func (sleeve *SleeveOverlay) handleFrame(sender *net.UDPAddr, fwd *sleeveForward
 	sleeve.sendToConsumer(srcPeer, dstPeer, frame, dec)
 }
 
-func (sleeve *SleeveOverlay) sendToConsumer(srcPeer, dstPeer *Peer, frame []byte, dec *EthernetDecoder) {
+func (sleeve *SleeveOverlay) sendToConsumer(srcPeer, dstPeer *mesh.Peer, frame []byte, dec *EthernetDecoder) {
 	if sleeve.consumer == nil {
 		return
 	}
@@ -282,7 +284,7 @@ type sleeveCrypto struct {
 type sleeveForwarder struct {
 	// Immutable
 	sleeve         *SleeveOverlay
-	remotePeer     *Peer
+	remotePeer     *mesh.Peer
 	remotePeerBin  []byte
 	sendControlMsg func(byte, []byte) error
 	connUID        uint64
@@ -349,7 +351,7 @@ type controlMessage struct {
 	msg []byte
 }
 
-func (sleeve *SleeveOverlay) PrepareConnection(params OverlayConnectionParams) (OverlayConnection, error) {
+func (sleeve *SleeveOverlay) PrepareConnection(params mesh.OverlayConnectionParams) (mesh.OverlayConnection, error) {
 	name := sleeve.localPeer.NameByte
 	var crypto sleeveCrypto
 	if params.SessionKey != nil {
@@ -759,13 +761,13 @@ func (fwd *sleeveForwarder) handleSpecialFrame(special specialFrame) error {
 
 func (fwd *sleeveForwarder) handleControlMessage(cm controlMessage) error {
 	switch cm.tag {
-	case ProtocolConnectionEstablished:
+	case mesh.ProtocolConnectionEstablished:
 		return fwd.handleHeartbeatAck()
 
-	case ProtocolFragmentationReceived:
+	case mesh.ProtocolFragmentationReceived:
 		return fwd.handleFragTestAck()
 
-	case ProtocolPMTUVerified:
+	case mesh.ProtocolPMTUVerified:
 		return fwd.handleMTUTestAck(cm.msg)
 
 	default:
@@ -834,7 +836,7 @@ func (fwd *sleeveForwarder) handleHeartbeat(special specialFrame) error {
 
 	if !fwd.ackedHeartbeat {
 		fwd.ackedHeartbeat = true
-		if err := fwd.sendControlMsg(ProtocolConnectionEstablished, nil); err != nil {
+		if err := fwd.sendControlMsg(mesh.ProtocolConnectionEstablished, nil); err != nil {
 			return err
 		}
 	}
@@ -895,7 +897,7 @@ func (fwd *sleeveForwarder) handleFragTest(frame []byte) error {
 		return nil
 	}
 
-	return fwd.sendControlMsg(ProtocolFragmentationReceived, nil)
+	return fwd.sendControlMsg(mesh.ProtocolFragmentationReceived, nil)
 }
 
 func (fwd *sleeveForwarder) handleFragTestAck() error {
@@ -941,7 +943,7 @@ func (fwd *sleeveForwarder) sendMTUTest() error {
 func (fwd *sleeveForwarder) handleMTUTest(frame []byte) error {
 	buf := make([]byte, 2)
 	binary.BigEndian.PutUint16(buf, uint16(len(frame)-EthernetOverhead))
-	return fwd.sendControlMsg(ProtocolPMTUVerified, buf)
+	return fwd.sendControlMsg(mesh.ProtocolPMTUVerified, buf)
 }
 
 func (fwd *sleeveForwarder) handleMTUTestAck(msg []byte) error {

testing/gossip/mocks.go

@@ -7,21 +7,21 @@ import (
 	"time"
 
 	"github.com/weaveworks/weave/common"
-	"github.com/weaveworks/weave/router"
+	"github.com/weaveworks/weave/mesh"
 )
 
 // Router to convey gossip from one gossiper to another, for testing
 type unicastMessage struct {
-	sender router.PeerName
+	sender mesh.PeerName
 	buf    []byte
 }
 type broadcastMessage struct {
-	sender router.PeerName
-	data   router.GossipData
+	sender mesh.PeerName
+	data   mesh.GossipData
 }
 type gossipMessage struct {
-	sender router.PeerName
-	data   router.GossipData
+	sender mesh.PeerName
+	data   mesh.GossipData
 }
 type exitMessage struct {
 	exitChan chan struct{}
@@ -31,12 +31,12 @@ type flushMessage struct {
 }
 
 type TestRouter struct {
-	gossipChans map[router.PeerName]chan interface{}
+	gossipChans map[mesh.PeerName]chan interface{}
 	loss        float32 // 0.0 means no loss
 }
 
 func NewTestRouter(loss float32) *TestRouter {
-	return &TestRouter{make(map[router.PeerName]chan interface{}, 100), loss}
+	return &TestRouter{make(map[mesh.PeerName]chan interface{}, 100), loss}
 }
 
 func (grouter *TestRouter) Stop() {
@@ -45,7 +45,7 @@ func (grouter *TestRouter) Stop() {
 	}
 }
 
-func (grouter *TestRouter) gossipBroadcast(sender router.PeerName, update router.GossipData) error {
+func (grouter *TestRouter) gossipBroadcast(sender mesh.PeerName, update mesh.GossipData) error {
 	for _, gossipChan := range grouter.gossipChans {
 		select {
 		case gossipChan <- broadcastMessage{sender: sender, data: update}:
@@ -56,7 +56,7 @@ func (grouter *TestRouter) gossipBroadcast(sender router.PeerName, update router
 	return nil
 }
 
-func (grouter *TestRouter) gossip(sender router.PeerName, update router.GossipData) error {
+func (grouter *TestRouter) gossip(sender mesh.PeerName, update mesh.GossipData) error {
 	count := int(math.Log2(float64(len(grouter.gossipChans))))
 	for dest, gossipChan := range grouter.gossipChans {
 		if dest == sender {
@@ -83,7 +83,7 @@ func (grouter *TestRouter) Flush() {
 	}
 }
 
-func (grouter *TestRouter) RemovePeer(peer router.PeerName) {
+func (grouter *TestRouter) RemovePeer(peer mesh.PeerName) {
 	gossipChan := grouter.gossipChans[peer]
 	resultChan := make(chan struct{})
 	gossipChan <- exitMessage{exitChan: resultChan}
@@ -93,10 +93,10 @@ func (grouter *TestRouter) RemovePeer(peer router.PeerName) {
 
 type TestRouterClient struct {
 	router *TestRouter
-	sender router.PeerName
+	sender mesh.PeerName
 }
 
-func (grouter *TestRouter) run(sender router.PeerName, gossiper router.Gossiper, gossipChan chan interface{}) {
+func (grouter *TestRouter) run(sender mesh.PeerName, gossiper mesh.Gossiper, gossipChan chan interface{}) {
 	gossipTimer := time.Tick(2 * time.Second)
 	for {
 		select {
@@ -155,7 +155,7 @@ func (grouter *TestRouter) run(sender router.PeerName, gossiper router.Gossiper,
 	}
 }
 
-func (grouter *TestRouter) Connect(sender router.PeerName, gossiper router.Gossiper) router.Gossip {
+func (grouter *TestRouter) Connect(sender mesh.PeerName, gossiper mesh.Gossiper) mesh.Gossip {
 	gossipChan := make(chan interface{}, 100)
 
 	go grouter.run(sender, gossiper, gossipChan)
@@ -164,7 +164,7 @@ func (grouter *TestRouter) Connect(sender router.PeerName, gossiper router.Gossi
 	return TestRouterClient{grouter, sender}
 }
 
-func (client TestRouterClient) GossipUnicast(dstPeerName router.PeerName, buf []byte) error {
+func (client TestRouterClient) GossipUnicast(dstPeerName mesh.PeerName, buf []byte) error {
 	select {
 	case client.router.gossipChans[dstPeerName] <- unicastMessage{sender: client.sender, buf: buf}:
 	default: // drop the message if we cannot send it
@@ -173,6 +173,6 @@ func (client TestRouterClient) GossipUnicast(dstPeerName router.PeerName, buf []
 	return nil
 }
 
-func (client TestRouterClient) GossipBroadcast(update router.GossipData) error {
+func (client TestRouterClient) GossipBroadcast(update mesh.GossipData) error {
 	return client.router.gossipBroadcast(client.sender, update)
 }