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p2p/discover: add some helper functions

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This commit is contained in:
Felix Lange 2015-02-05 03:07:18 +01:00
parent 12224c7f59
commit 739066ec56
4 changed files with 41 additions and 20 deletions
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37
p2p/discover/table.go
View File

@ -87,6 +87,16 @@ func newTable(t transport, ourID NodeID, ourAddr *net.UDPAddr) *Table {
return tab
}
// Self returns the local node ID.
func (tab *Table) Self() NodeID {
return tab.self.ID
}
// Close terminates the network listener.
func (tab *Table) Close() {
tab.net.close()
}
// Bootstrap sets the bootstrap nodes. These nodes are used to connect
// to the network if the table is empty. Bootstrap will also attempt to
// fill the table by performing random lookup operations on the
@ -319,27 +329,38 @@ func (n NodeID) GoString() string {
// HexID converts a hex string to a NodeID.
// The string may be prefixed with 0x.
func HexID(in string) NodeID {
func HexID(in string) (NodeID, error) {
if strings.HasPrefix(in, "0x") {
in = in[2:]
}
var id NodeID
b, err := hex.DecodeString(in)
if err != nil {
panic(err)
return id, err
} else if len(b) != len(id) {
panic("wrong length")
return id, fmt.Errorf("wrong length, need %d hex bytes", len(id))
}
copy(id[:], b)
return id, nil
}
// MustHexID converts a hex string to a NodeID.
// It panics if the string is not a valid NodeID.
func MustHexID(in string) NodeID {
id, err := HexID(in)
if err != nil {
panic(err)
}
return id
}
func newNodeID(priv *ecdsa.PrivateKey) (id NodeID) {
pubkey := elliptic.Marshal(priv.Curve, priv.X, priv.Y)
if len(pubkey)-1 != len(id) {
panic(fmt.Errorf("invalid key: need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pubkey)))
func PubkeyID(pub *ecdsa.PublicKey) NodeID {
var id NodeID
pbytes := elliptic.Marshal(pub.Curve, pub.X, pub.Y)
if len(pbytes)-1 != len(id) {
panic(fmt.Errorf("invalid key: need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pbytes)))
}
copy(id[:], pubkey[1:])
copy(id[:], pbytes[1:])
return id
}

6
p2p/discover/table_test.go
View File

@ -22,8 +22,8 @@ var (
func TestHexID(t *testing.T) {
ref := NodeID{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 106, 217, 182, 31, 165, 174, 1, 67, 7, 235, 220, 150, 66, 83, 173, 205, 159, 44, 10, 57, 42, 161, 26, 188}
id1 := HexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc")
id2 := HexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc")
id1 := MustHexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc")
id2 := MustHexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc")
if id1 != ref {
t.Errorf("wrong id1\ngot %v\nwant %v", id1[:], ref[:])
@ -41,7 +41,7 @@ func TestNodeID_recover(t *testing.T) {
t.Fatalf("signing error: %v", err)
}
pub := newNodeID(prv)
pub := PubkeyID(&prv.PublicKey)
recpub, err := recoverNodeID(hash, sig)
if err != nil {
t.Fatalf("recovery error: %v", err)

4
p2p/discover/udp.go
View File

@ -120,8 +120,8 @@ func ListenUDP(priv *ecdsa.PrivateKey, laddr string) (*Table, error) {
if err != nil {
return nil, err
}
net.Table = newTable(net, newNodeID(priv), realaddr)
log.DebugDetailf("Listening on %v, my ID %x\n", realaddr, net.self.ID[:])
net.Table = newTable(net, PubkeyID(&priv.PublicKey), realaddr)
log.Debugf("Listening on %v, my ID %x\n", realaddr, net.self.ID[:])
return net.Table, nil
}

14
p2p/discover/udp_test.go
View File

@ -19,8 +19,8 @@ func TestUDP_ping(t *testing.T) {
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
n2, _ := ListenUDP(newkey(), "127.0.0.1:0")
defer n1.net.close()
defer n2.net.close()
defer n1.Close()
defer n2.Close()
if err := n1.net.ping(n2.self); err != nil {
t.Fatalf("ping error: %v", err)
@ -49,8 +49,8 @@ func TestUDP_findnode(t *testing.T) {
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
n2, _ := ListenUDP(newkey(), "127.0.0.1:0")
defer n1.net.close()
defer n2.net.close()
defer n1.Close()
defer n2.Close()
entry := &Node{ID: NodeID{1}, Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: 15}}
n2.add([]*Node{entry})
@ -77,7 +77,7 @@ func TestUDP_replytimeout(t *testing.T) {
defer fd.Close()
n1, _ := ListenUDP(newkey(), "127.0.0.1:0")
defer n1.net.close()
defer n1.Close()
n2 := n1.bumpOrAdd(randomID(n1.self.ID, 10), fd.LocalAddr().(*net.UDPAddr))
if err := n1.net.ping(n2); err != errTimeout {
@ -97,8 +97,8 @@ func TestUDP_findnodeMultiReply(t *testing.T) {
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()
defer n1.Close()
defer n2.Close()
nodes := make([]*Node, bucketSize)
for i := range nodes {