| 1 | package harness |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "math/rand" |
| 6 | "net" |
| 7 | "sync" |
| 8 | "testing" |
| 9 | |
| 10 | "github.com/ipfs/kubo/config" |
| 11 | ) |
| 12 | |
| 13 | type Peering struct { |
| 14 | From int |
| 15 | To int |
| 16 | } |
| 17 | |
| 18 | var ( |
| 19 | allocatedPorts = make(map[int]struct{}) |
| 20 | portMutex sync.Mutex |
| 21 | ) |
| 22 | |
| 23 | func NewRandPort() int { |
| 24 | portMutex.Lock() |
| 25 | defer portMutex.Unlock() |
| 26 | |
| 27 | for range 100 { |
| 28 | l, err := net.Listen("tcp", "localhost:0") |
| 29 | if err != nil { |
| 30 | continue |
| 31 | } |
| 32 | port := l.Addr().(*net.TCPAddr).Port |
| 33 | l.Close() |
| 34 | |
| 35 | if _, used := allocatedPorts[port]; !used { |
| 36 | allocatedPorts[port] = struct{}{} |
| 37 | return port |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | // Fallback to random port if we can't get a unique one from the OS |
| 42 | for range 1000 { |
| 43 | port := 30000 + rand.Intn(10000) |
| 44 | if _, used := allocatedPorts[port]; !used { |
| 45 | allocatedPorts[port] = struct{}{} |
| 46 | return port |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | panic("failed to allocate unique port after 1100 attempts") |
| 51 | } |
| 52 | |
| 53 | func CreatePeerNodes(t *testing.T, n int, peerings []Peering) (*Harness, Nodes) { |
| 54 | h := NewT(t) |
| 55 | nodes := h.NewNodes(n).Init() |
| 56 | nodes.ForEachPar(func(node *Node) { |
| 57 | node.UpdateConfig(func(cfg *config.Config) { |
| 58 | cfg.Routing.Type = config.NewOptionalString("none") |
| 59 | cfg.Addresses.Swarm = []string{fmt.Sprintf("/ip4/127.0.0.1/tcp/%d", NewRandPort())} |
| 60 | }) |
| 61 | }) |
| 62 | |
| 63 | for _, peering := range peerings { |
| 64 | nodes[peering.From].PeerWith(nodes[peering.To]) |
| 65 | } |
| 66 | |
| 67 | return h, nodes |
| 68 | } |