func (t *packetTransport) sendLoop() {
defer t.logger.Printf("packet transport: send loop exit")
for msg := range t.outgoingc {
b, err := msg.Marshal()
if err != nil {
t.logger.Printf("packet transport: send to Raft ID %x: %v (continuing)", msg.To, err)
continue
}
peerName, err := t.translate(mesh.PeerUID(msg.To))
if err != nil {
select {
case t.unreachablec <- msg.To:
t.logger.Printf("packet transport: send to Raft ID %x: %v (unreachable; continuing) (%s)", msg.To, err, msg.Type)
default:
t.logger.Printf("packet transport: send to Raft ID %x: %v (unreachable, report dropped; continuing) (%s)", msg.To, err, msg.Type)
}
continue
}
dst := meshconn.MeshAddr{PeerName: peerName}
if n, err := t.conn.WriteTo(b, dst); err != nil {
t.logger.Printf("packet transport: send to Mesh peer %s: %v (continuing)", dst, err)
continue
} else if n < len(b) {
t.logger.Printf("packet transport: send to Mesh peer %s: short write, %d < %d (continuing)", dst, n, len(b))
continue
}
//t.logger.Printf("packet transport: send to %s (sz %d/%d) OK", dst, msg.Size(), len(b))
}
}
func makeAllocator(name string, cidrStr string, quorum uint) (*Allocator, address.Range) {
peername, err := mesh.PeerNameFromString(name)
if err != nil {
panic(err)
}
_, cidr, err := address.ParseCIDR(cidrStr)
if err != nil {
panic(err)
}
alloc := NewAllocator(peername, mesh.PeerUID(rand.Int63()),
"nick-"+name, cidr.Range(), quorum, func(mesh.PeerName) bool { return true })
return alloc, cidr.HostRange()
}
// Restart a node
func (m *Model) restart(node *TestNode) {
node.Node = NewNode(mesh.PeerName(m.nextID),
mesh.PeerUID(m.r.Int63()), m.quorum)
m.nextID++
node.Propose()
// The node is now ignorant, so we need to mark the links into
// the node as ready.
for _, l := range node.links {
if !l.to.isolated {
m.readyLink(l.converse)
}
}
// If a consensus was just accepted due to this node accepting
// it, without other nodes hearing of it, and we then restart
// this node, then a different consensus can occur later on.
// If a tree falls with no one to hear it, does it make a
// sound?
node.firstConsensus = AcceptedValue{}
}
// Make a network of nodes with random topology
func makeRandomModel(params *TestParams, r *rand.Rand, t *testing.T) *Model {
m := Model{
t: t,
r: r,
quorum: params.nodeCount/2 + 1,
nodes: make([]TestNode, params.nodeCount),
readyLinks: []*Link{},
nextID: params.nodeCount + 1,
}
for i := range m.nodes {
m.nodes[i].Node = NewNode(mesh.PeerName(i/2+1),
mesh.PeerUID(r.Int63()), m.quorum)
m.nodes[i].Propose()
}
for i := 1; i < len(m.nodes); i++ {
// was node i connected to the other nodes yet?
connected := false
for j := 0; j < i; j++ {
if r.Float32() < params.connectedProb {
connected = true
m.addLink(&m.nodes[i], &m.nodes[j])
}
}
if !connected {
// node i must be connected into the graph
// somewhere. So if we didn't connect it
// already, this is a last resort.
m.addLink(&m.nodes[i], &m.nodes[r.Intn(i)])
}
}
return &m
}
