diff options
Diffstat (limited to 'p2p')
-rw-r--r-- | p2p/discover/database_test.go | 16 | ||||
-rw-r--r-- | p2p/discover/node.go | 72 | ||||
-rw-r--r-- | p2p/discover/node_test.go | 88 | ||||
-rw-r--r-- | p2p/discover/table.go | 26 | ||||
-rw-r--r-- | p2p/discover/table_test.go | 6 | ||||
-rw-r--r-- | p2p/discover/udp.go | 2 | ||||
-rw-r--r-- | p2p/discover/udp_test.go | 2 |
7 files changed, 158 insertions, 54 deletions
diff --git a/p2p/discover/database_test.go b/p2p/discover/database_test.go index 80c1a6ff2..5a729f02b 100644 --- a/p2p/discover/database_test.go +++ b/p2p/discover/database_test.go @@ -102,7 +102,7 @@ func TestNodeDBInt64(t *testing.T) { } func TestNodeDBFetchStore(t *testing.T) { - node := newNode( + node := NewNode( MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{192, 168, 0, 1}, 30303, @@ -165,7 +165,7 @@ var nodeDBSeedQueryNodes = []struct { // This one should not be in the result set because its last // pong time is too far in the past. { - node: newNode( + node: NewNode( MustHexID("0x84d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 3}, 30303, @@ -176,7 +176,7 @@ var nodeDBSeedQueryNodes = []struct { // This one shouldn't be in in the result set because its // nodeID is the local node's ID. { - node: newNode( + node: NewNode( MustHexID("0x57d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 3}, 30303, @@ -187,7 +187,7 @@ var nodeDBSeedQueryNodes = []struct { // These should be in the result set. { - node: newNode( + node: NewNode( MustHexID("0x22d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 1}, 30303, @@ -196,7 +196,7 @@ var nodeDBSeedQueryNodes = []struct { pong: time.Now().Add(-2 * time.Second), }, { - node: newNode( + node: NewNode( MustHexID("0x44d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 2}, 30303, @@ -205,7 +205,7 @@ var nodeDBSeedQueryNodes = []struct { pong: time.Now().Add(-3 * time.Second), }, { - node: newNode( + node: NewNode( MustHexID("0xe2d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 3}, 30303, @@ -303,7 +303,7 @@ var nodeDBExpirationNodes = []struct { exp bool }{ { - node: newNode( + node: NewNode( MustHexID("0x01d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 1}, 30303, @@ -312,7 +312,7 @@ var nodeDBExpirationNodes = []struct { pong: time.Now().Add(-nodeDBNodeExpiration + time.Minute), exp: false, }, { - node: newNode( + node: NewNode( MustHexID("0x02d9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{127, 0, 0, 2}, 30303, diff --git a/p2p/discover/node.go b/p2p/discover/node.go index dd19df3a2..fac493f01 100644 --- a/p2p/discover/node.go +++ b/p2p/discover/node.go @@ -26,6 +26,7 @@ import ( "math/rand" "net" "net/url" + "regexp" "strconv" "strings" @@ -37,6 +38,7 @@ import ( const nodeIDBits = 512 // Node represents a host on the network. +// The fields of Node may not be modified. type Node struct { IP net.IP // len 4 for IPv4 or 16 for IPv6 UDP, TCP uint16 // port numbers @@ -54,7 +56,9 @@ type Node struct { contested bool } -func newNode(id NodeID, ip net.IP, udpPort, tcpPort uint16) *Node { +// NewNode creates a new node. It is mostly meant to be used for +// testing purposes. +func NewNode(id NodeID, ip net.IP, udpPort, tcpPort uint16) *Node { if ipv4 := ip.To4(); ipv4 != nil { ip = ipv4 } @@ -71,31 +75,47 @@ func (n *Node) addr() *net.UDPAddr { return &net.UDPAddr{IP: n.IP, Port: int(n.UDP)} } +// Incomplete returns true for nodes with no IP address. +func (n *Node) Incomplete() bool { + return n.IP == nil +} + // The string representation of a Node is a URL. // Please see ParseNode for a description of the format. func (n *Node) String() string { - addr := net.TCPAddr{IP: n.IP, Port: int(n.TCP)} - u := url.URL{ - Scheme: "enode", - User: url.User(fmt.Sprintf("%x", n.ID[:])), - Host: addr.String(), - } - if n.UDP != n.TCP { - u.RawQuery = "discport=" + strconv.Itoa(int(n.UDP)) + u := url.URL{Scheme: "enode"} + if n.Incomplete() { + u.Host = fmt.Sprintf("%x", n.ID[:]) + } else { + addr := net.TCPAddr{IP: n.IP, Port: int(n.TCP)} + u.User = url.User(fmt.Sprintf("%x", n.ID[:])) + u.Host = addr.String() + if n.UDP != n.TCP { + u.RawQuery = "discport=" + strconv.Itoa(int(n.UDP)) + } } return u.String() } -// ParseNode parses a node URL. +var incompleteNodeURL = regexp.MustCompile("(?i)^(?:enode://)?([0-9a-f]+)$") + +// ParseNode parses a node designator. +// +// There are two basic forms of node designators +// - incomplete nodes, which only have the public key (node ID) +// - complete nodes, which contain the public key and IP/Port information +// +// For incomplete nodes, the designator must look like one of these // -// A node URL has scheme "enode". +// enode://<hex node id> +// <hex node id> // -// The hexadecimal node ID is encoded in the username portion of the -// URL, separated from the host by an @ sign. The hostname can only be -// given as an IP address, DNS domain names are not allowed. The port -// in the host name section is the TCP listening port. If the TCP and -// UDP (discovery) ports differ, the UDP port is specified as query -// parameter "discport". +// For complete nodes, the node ID is encoded in the username portion +// of the URL, separated from the host by an @ sign. The hostname can +// only be given as an IP address, DNS domain names are not allowed. +// The port in the host name section is the TCP listening port. If the +// TCP and UDP (discovery) ports differ, the UDP port is specified as +// query parameter "discport". // // In the following example, the node URL describes // a node with IP address 10.3.58.6, TCP listening port 30303 @@ -103,12 +123,26 @@ func (n *Node) String() string { // // enode://<hex node id>@10.3.58.6:30303?discport=30301 func ParseNode(rawurl string) (*Node, error) { + if m := incompleteNodeURL.FindStringSubmatch(rawurl); m != nil { + id, err := HexID(m[1]) + if err != nil { + return nil, fmt.Errorf("invalid node ID (%v)", err) + } + return NewNode(id, nil, 0, 0), nil + } + return parseComplete(rawurl) +} + +func parseComplete(rawurl string) (*Node, error) { var ( id NodeID ip net.IP tcpPort, udpPort uint64 ) u, err := url.Parse(rawurl) + if err != nil { + return nil, err + } if u.Scheme != "enode" { return nil, errors.New("invalid URL scheme, want \"enode\"") } @@ -143,7 +177,7 @@ func ParseNode(rawurl string) (*Node, error) { return nil, errors.New("invalid discport in query") } } - return newNode(id, ip, uint16(udpPort), uint16(tcpPort)), nil + return NewNode(id, ip, uint16(udpPort), uint16(tcpPort)), nil } // MustParseNode parses a node URL. It panics if the URL is not valid. @@ -180,7 +214,7 @@ func HexID(in string) (NodeID, error) { if err != nil { return id, err } else if len(b) != len(id) { - return id, fmt.Errorf("wrong length, need %d hex bytes", len(id)) + return id, fmt.Errorf("wrong length, want %d hex chars", len(id)*2) } copy(id[:], b) return id, nil diff --git a/p2p/discover/node_test.go b/p2p/discover/node_test.go index e523e12d2..3d1662d0b 100644 --- a/p2p/discover/node_test.go +++ b/p2p/discover/node_test.go @@ -17,10 +17,12 @@ package discover import ( + "fmt" "math/big" "math/rand" "net" "reflect" + "strings" "testing" "testing/quick" "time" @@ -29,6 +31,27 @@ import ( "github.com/ethereum/go-ethereum/crypto" ) +func ExampleNewNode() { + id := MustHexID("1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439") + + // Complete nodes contain UDP and TCP endpoints: + n1 := NewNode(id, net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 52150, 30303) + fmt.Println("n1:", n1) + fmt.Println("n1.Incomplete() ->", n1.Incomplete()) + + // An incomplete node can be created by passing zero values + // for all parameters except id. + n2 := NewNode(id, nil, 0, 0) + fmt.Println("n2:", n2) + fmt.Println("n2.Incomplete() ->", n2.Incomplete()) + + // Output: + // n1: enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@[2001:db8:3c4d:15::abcd:ef12]:30303?discport=52150 + // n1.Incomplete() -> false + // n2: enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439 + // n2.Incomplete() -> true +} + var parseNodeTests = []struct { rawurl string wantError string @@ -39,13 +62,10 @@ var parseNodeTests = []struct { wantError: `invalid URL scheme, want "enode"`, }, { - rawurl: "enode://foobar", - wantError: `does not contain node ID`, - }, - { rawurl: "enode://01010101@123.124.125.126:3", - wantError: `invalid node ID (wrong length, need 64 hex bytes)`, + wantError: `invalid node ID (wrong length, want 128 hex chars)`, }, + // Complete nodes with IP address. { rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@hostname:3", wantError: `invalid IP address`, @@ -60,7 +80,7 @@ var parseNodeTests = []struct { }, { rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:52150", - wantResult: newNode( + wantResult: NewNode( MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{0x7f, 0x0, 0x0, 0x1}, 52150, @@ -69,7 +89,7 @@ var parseNodeTests = []struct { }, { rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@[::]:52150", - wantResult: newNode( + wantResult: NewNode( MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.ParseIP("::"), 52150, @@ -78,7 +98,7 @@ var parseNodeTests = []struct { }, { rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@[2001:db8:3c4d:15::abcd:ef12]:52150", - wantResult: newNode( + wantResult: NewNode( MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 52150, @@ -87,33 +107,62 @@ var parseNodeTests = []struct { }, { rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:52150?discport=22334", - wantResult: newNode( + wantResult: NewNode( MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), net.IP{0x7f, 0x0, 0x0, 0x1}, 22334, 52150, ), }, + // Incomplete nodes with no address. + { + rawurl: "1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439", + wantResult: NewNode( + MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), + nil, 0, 0, + ), + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439", + wantResult: NewNode( + MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), + nil, 0, 0, + ), + }, + // Invalid URLs + { + rawurl: "01010101", + wantError: `invalid node ID (wrong length, want 128 hex chars)`, + }, + { + rawurl: "enode://01010101", + wantError: `invalid node ID (wrong length, want 128 hex chars)`, + }, + { + // This test checks that errors from url.Parse are handled. + rawurl: "://foo", + wantError: `parse ://foo: missing protocol scheme`, + }, } func TestParseNode(t *testing.T) { - for i, test := range parseNodeTests { + for _, test := range parseNodeTests { n, err := ParseNode(test.rawurl) if test.wantError != "" { if err == nil { - t.Errorf("test %d: got nil error, expected %#q", i, test.wantError) + t.Errorf("test %q:\n got nil error, expected %#q", test.rawurl, test.wantError) continue } else if err.Error() != test.wantError { - t.Errorf("test %d: got error %#q, expected %#q", i, err.Error(), test.wantError) + t.Errorf("test %q:\n got error %#q, expected %#q", test.rawurl, err.Error(), test.wantError) continue } } else { if err != nil { - t.Errorf("test %d: unexpected error: %v", i, err) + t.Errorf("test %q:\n unexpected error: %v", test.rawurl, err) continue } if !reflect.DeepEqual(n, test.wantResult) { - t.Errorf("test %d: result mismatch:\ngot: %#v, want: %#v", i, n, test.wantResult) + t.Errorf("test %q:\n result mismatch:\ngot: %#v, want: %#v", test.rawurl, n, test.wantResult) } } } @@ -121,12 +170,11 @@ func TestParseNode(t *testing.T) { func TestNodeString(t *testing.T) { for i, test := range parseNodeTests { - if test.wantError != "" { - continue - } - str := test.wantResult.String() - if str != test.rawurl { - t.Errorf("test %d: Node.String() mismatch:\ngot: %s\nwant: %s", i, str, test.rawurl) + if test.wantError == "" && strings.HasPrefix(test.rawurl, "enode://") { + str := test.wantResult.String() + if str != test.rawurl { + t.Errorf("test %d: Node.String() mismatch:\ngot: %s\nwant: %s", i, str, test.rawurl) + } } } } diff --git a/p2p/discover/table.go b/p2p/discover/table.go index 298ba3fa6..efa6e8eea 100644 --- a/p2p/discover/table.go +++ b/p2p/discover/table.go @@ -99,7 +99,7 @@ func newTable(t transport, ourID NodeID, ourAddr *net.UDPAddr, nodeDBPath string tab := &Table{ net: t, db: db, - self: newNode(ourID, ourAddr.IP, uint16(ourAddr.Port), uint16(ourAddr.Port)), + self: NewNode(ourID, ourAddr.IP, uint16(ourAddr.Port), uint16(ourAddr.Port)), bonding: make(map[NodeID]*bondproc), bondslots: make(chan struct{}, maxBondingPingPongs), refreshReq: make(chan struct{}), @@ -196,6 +196,28 @@ func (tab *Table) Bootstrap(nodes []*Node) { tab.requestRefresh() } +// Resolve searches for a specific node with the given ID. +// It returns nil if the node could not be found. +func (tab *Table) Resolve(targetID NodeID) *Node { + // If the node is present in the local table, no + // network interaction is required. + hash := crypto.Sha3Hash(targetID[:]) + tab.mutex.Lock() + cl := tab.closest(hash, 1) + tab.mutex.Unlock() + if len(cl.entries) > 0 && cl.entries[0].ID == targetID { + return cl.entries[0] + } + // Otherwise, do a network lookup. + result := tab.Lookup(targetID) + for _, n := range result { + if n.ID == targetID { + return n + } + } + return nil +} + // Lookup performs a network search for nodes close // to the given target. It approaches the target by querying // nodes that are closer to it on each iteration. @@ -466,7 +488,7 @@ func (tab *Table) pingpong(w *bondproc, pinged bool, id NodeID, addr *net.UDPAdd tab.net.waitping(id) } // Bonding succeeded, update the node database. - w.n = newNode(id, addr.IP, uint16(addr.Port), tcpPort) + w.n = NewNode(id, addr.IP, uint16(addr.Port), tcpPort) tab.db.updateNode(w.n) close(w.done) } diff --git a/p2p/discover/table_test.go b/p2p/discover/table_test.go index 13effaed6..30a418f44 100644 --- a/p2p/discover/table_test.go +++ b/p2p/discover/table_test.go @@ -36,7 +36,7 @@ func TestTable_pingReplace(t *testing.T) { transport := newPingRecorder() tab, _ := newTable(transport, NodeID{}, &net.UDPAddr{}, "") defer tab.Close() - pingSender := newNode(MustHexID("a502af0f59b2aab7746995408c79e9ca312d2793cc997e44fc55eda62f0150bbb8c59a6f9269ba3a081518b62699ee807c7c19c20125ddfccca872608af9e370"), net.IP{}, 99, 99) + pingSender := NewNode(MustHexID("a502af0f59b2aab7746995408c79e9ca312d2793cc997e44fc55eda62f0150bbb8c59a6f9269ba3a081518b62699ee807c7c19c20125ddfccca872608af9e370"), net.IP{}, 99, 99) // fill up the sender's bucket. last := fillBucket(tab, 253) @@ -287,7 +287,7 @@ func TestTable_Lookup(t *testing.T) { t.Fatalf("lookup on empty table returned %d results: %#v", len(results), results) } // seed table with initial node (otherwise lookup will terminate immediately) - seed := newNode(lookupTestnet.dists[256][0], net.IP{}, 256, 0) + seed := NewNode(lookupTestnet.dists[256][0], net.IP{}, 256, 0) tab.stuff([]*Node{seed}) results := tab.Lookup(lookupTestnet.target) @@ -517,7 +517,7 @@ func (tn *preminedTestnet) findnode(toid NodeID, toaddr *net.UDPAddr, target Nod next := uint16(toaddr.Port) - 1 var result []*Node for i, id := range tn.dists[toaddr.Port] { - result = append(result, newNode(id, net.ParseIP("127.0.0.1"), next, uint16(i))) + result = append(result, NewNode(id, net.ParseIP("127.0.0.1"), next, uint16(i))) } return result, nil } diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index fc7fa737c..e93949c56 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -120,7 +120,7 @@ func nodeFromRPC(rn rpcNode) (n *Node, valid bool) { if rn.IP.IsMulticast() || rn.IP.IsUnspecified() || rn.UDP == 0 { return nil, false } - return newNode(rn.ID, rn.IP, rn.UDP, rn.TCP), true + return NewNode(rn.ID, rn.IP, rn.UDP, rn.TCP), true } func nodeToRPC(n *Node) rpcNode { diff --git a/p2p/discover/udp_test.go b/p2p/discover/udp_test.go index 944e73d6e..55d6d564a 100644 --- a/p2p/discover/udp_test.go +++ b/p2p/discover/udp_test.go @@ -243,7 +243,7 @@ func TestUDP_findnode(t *testing.T) { // ensure there's a bond with the test node, // findnode won't be accepted otherwise. - test.table.db.updateNode(newNode( + test.table.db.updateNode(NewNode( PubkeyID(&test.remotekey.PublicKey), test.remoteaddr.IP, uint16(test.remoteaddr.Port), |