package discover
import (
logpkg "log"
"net"
"os"
"testing"
"time"
"github.com/ethereum/go-ethereum/logger"
)
func init() {
logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, logpkg.LstdFlags, logger.DebugLevel))
}
func TestUDP_ping(t *testing.T) {
t.Parallel()
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
n2, _ := ListenUDP(newkey(), "127.0.0.1:0")
defer n1.net.close()
defer n2.net.close()
if err := n1.net.ping(n2.self); err != nil {
t.Fatalf("ping error: %v", err)
}
if find(n2, n1.self.ID) == nil {
t.Errorf("node 2 does not contain id of node 1")
}
if e := find(n1, n2.self.ID); e != nil {
t.Errorf("node 1 does contains id of node 2: %v", e)
}
}
func find(tab *Table, id NodeID) *Node {
for _, b := range tab.buckets {
for _, e := range b.entries {
if e.ID == id {
return e
}
}
}
return nil
}
func TestUDP_findnode(t *testing.T) {
t.Parallel()
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
n2, _ := ListenUDP(newkey(), "127.0.0.1:0")
defer n1.net.close()
defer n2.net.close()
entry := &Node{ID: NodeID{1}, Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: 15}}
n2.add([]*Node{entry})
target := randomID(n1.self.ID, 100)
result, _ := n1.net.findnode(n2.self, target)
if len(result) != 1 {
t.Fatalf("wrong number of results: got %d, want 1", len(result))
}
if result[0].ID != entry.ID {
t.Errorf("wrong result: got %v, want %v", result[0], entry)
}
}
func TestUDP_replytimeout(t *testing.T) {
t.Parallel()
// reserve a port so we don't talk to an existing service by accident
addr, _ := net.ResolveUDPAddr("udp", "127.0.0.1:0")
fd, err := net.ListenUDP("udp", addr)
if err != nil {
t.Fatal(err)
}
defer fd.Close()
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
defer n1.net.close()
n2 := n1.bumpOrAdd(randomID(n1.self.ID, 10), fd.LocalAddr().(*net.UDPAddr))
if err := n1.net.ping(n2); err != errTimeout {
t.Error("expected timeout error, got", err)
}
if result, err := n1.net.findnode(n2, n1.self.ID); err != errTimeout {
t.Error("expected timeout error, got", err)
} else if len(result) > 0 {
t.Error("expected empty result, got", result)
}
}
func TestUDP_findnodeMultiReply(t *testing.T) {
t.Parallel()
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
n2, _ := ListenUDP(newkey(), "127.0.0.1:0")
udp2 := n2.net.(*udp)
defer n1.net.close()
defer n2.net.close()
nodes := make([]*Node, bucketSize)
for i := range nodes {
nodes[i] = &Node{
Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: i + 1},
ID: randomID(n2.self.ID, i+1),
}
}
// ask N2 for neighbors. it will send an empty reply back.
// the request will wait for up to bucketSize replies.
resultC := make(chan []*Node)
go func() {
ns, err := n1.net.findnode(n2.self, n1.self.ID)
if err != nil {
t.Error("findnode error:", err)
}
resultC <- ns
}()
// send a few more neighbors packets to N1.
// it should collect those.
for end := 0; end < len(nodes); {
off := end
if end = end + 5; end > len(nodes) {
end = len(nodes)
}
udp2.send(n1.self, neighborsPacket, neighbors{
Nodes: nodes[off:end],
Expiration: uint64(time.Now().Add(10 * time.Second).Unix()),
})
}
// check that they are all returned. we cannot just check for
// equality because they might not be returned in the order they
// were sent.
result := <-resultC
if hasDuplicates(result) {
t.Error("result slice contains duplicates")
}
if len(result) != len(nodes) {
t.Errorf("wrong number of nodes returned: got %d, want %d", len(result), len(nodes))
}
matched := make(map[NodeID]bool)
for _, n := range result {
for _, expn := range nodes {
if n.ID == expn.ID { // && bytes.Equal(n.Addr.IP, expn.Addr.IP) && n.Addr.Port == expn.Addr.Port {
matched[n.ID] = true
}
}
}
if len(matched) != len(nodes) {
t.Errorf("wrong number of matching nodes: got %d, want %d", len(matched), len(nodes))
}
}
