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Fixes tendermint/tendermint#3522

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* OriginalAddr -> SocketAddr

OriginalAddr records the originally dialed address for outbound peers,
rather than the peer's self reported address. For inbound peers, it was
nil. Here, we rename it to SocketAddr and for inbound peers, set it to
the RemoteAddr of the connection.

* use SocketAddr

Numerous places in the code call peer.NodeInfo().NetAddress().
However, this call to NetAddress() may perform a DNS lookup if the
reported NodeInfo.ListenAddr includes a name. Failure of this lookup
returns a nil address, which can lead to panics in the code.

Instead, call peer.SocketAddr() to return the static address of the
connection.

* remove nodeInfo.NetAddress()

Expose `transport.NetAddress()`, a static result determined
when the transport is created. Removing NetAddress() from the nodeInfo
prevents accidental DNS lookups.

* fixes from review

* linter

* fixes from review
This commit is contained in:
Ethan Buchman
2019-04-01 19:59:57 -04:00
committed by GitHub
parent 1ecf814838
commit 882622ec10
14 changed files with 127 additions and 109 deletions
Download Patch File Download Diff File Expand all files Collapse all files
p2p/pex/pex_reactor.go
+2 -2
View File
@@ -167,7 +167,7 @@ func (r *PEXReactor) AddPeer(p Peer) {
}
} else {
// inbound peer is its own source
addr := p.NodeInfo().NetAddress()
addr := p.SocketAddr()
src := addr
// add to book. dont RequestAddrs right away because
@@ -309,7 +309,7 @@ func (r *PEXReactor) ReceiveAddrs(addrs []*p2p.NetAddress, src Peer) error {
}
r.requestsSent.Delete(id)
srcAddr := src.NodeInfo().NetAddress()
srcAddr := src.SocketAddr()
for _, netAddr := range addrs {
// Validate netAddr. Disconnect from a peer if it sends us invalid data.
if netAddr == nil {
p2p/pex/pex_reactor_test.go
+14 -13
View File
@@ -96,7 +96,7 @@ func TestPEXReactorRunning(t *testing.T) {
}
addOtherNodeAddrToAddrBook := func(switchIndex, otherSwitchIndex int) {
addr := switches[otherSwitchIndex].NodeInfo().NetAddress()
addr := switches[otherSwitchIndex].NetAddress()
books[switchIndex].AddAddress(addr, addr)
}
@@ -127,7 +127,7 @@ func TestPEXReactorReceive(t *testing.T) {
r.RequestAddrs(peer)
size := book.Size()
addrs := []*p2p.NetAddress{peer.NodeInfo().NetAddress()}
addrs := []*p2p.NetAddress{peer.SocketAddr()}
msg := cdc.MustMarshalBinaryBare(&pexAddrsMessage{Addrs: addrs})
r.Receive(PexChannel, peer, msg)
assert.Equal(t, size+1, book.Size())
@@ -184,7 +184,7 @@ func TestPEXReactorAddrsMessageAbuse(t *testing.T) {
assert.True(t, r.requestsSent.Has(id))
assert.True(t, sw.Peers().Has(peer.ID()))
addrs := []*p2p.NetAddress{peer.NodeInfo().NetAddress()}
addrs := []*p2p.NetAddress{peer.SocketAddr()}
msg := cdc.MustMarshalBinaryBare(&pexAddrsMessage{Addrs: addrs})
// receive some addrs. should clear the request
@@ -229,7 +229,7 @@ func TestCheckSeeds(t *testing.T) {
badPeerConfig = &PEXReactorConfig{
Seeds: []string{"ed3dfd27bfc4af18f67a49862f04cc100696e84d@bad.network.addr:26657",
"d824b13cb5d40fa1d8a614e089357c7eff31b670@anotherbad.network.addr:26657",
seed.NodeInfo().NetAddress().String()},
seed.NetAddress().String()},
}
peer = testCreatePeerWithConfig(dir, 2, badPeerConfig)
require.Nil(t, peer.Start())
@@ -263,12 +263,13 @@ func TestConnectionSpeedForPeerReceivedFromSeed(t *testing.T) {
defer os.RemoveAll(dir) // nolint: errcheck
// 1. create peer
peer := testCreateDefaultPeer(dir, 1)
require.Nil(t, peer.Start())
defer peer.Stop()
peerSwitch := testCreateDefaultPeer(dir, 1)
require.Nil(t, peerSwitch.Start())
defer peerSwitch.Stop()
// 2. Create seed which knows about the peer
seed := testCreateSeed(dir, 2, []*p2p.NetAddress{peer.NodeInfo().NetAddress()}, []*p2p.NetAddress{peer.NodeInfo().NetAddress()})
peerAddr := peerSwitch.NetAddress()
seed := testCreateSeed(dir, 2, []*p2p.NetAddress{peerAddr}, []*p2p.NetAddress{peerAddr})
require.Nil(t, seed.Start())
defer seed.Stop()
@@ -295,7 +296,7 @@ func TestPEXReactorCrawlStatus(t *testing.T) {
// Create a peer, add it to the peer set and the addrbook.
peer := p2p.CreateRandomPeer(false)
p2p.AddPeerToSwitch(pexR.Switch, peer)
addr1 := peer.NodeInfo().NetAddress()
addr1 := peer.SocketAddr()
pexR.book.AddAddress(addr1, addr1)
// Add a non-connected address to the book.
@@ -359,7 +360,7 @@ func TestPEXReactorSeedModeFlushStop(t *testing.T) {
reactor := switches[0].Reactors()["pex"].(*PEXReactor)
peerID := switches[1].NodeInfo().ID()
err = switches[1].DialPeerWithAddress(switches[0].NodeInfo().NetAddress(), false)
err = switches[1].DialPeerWithAddress(switches[0].NetAddress(), false)
assert.NoError(t, err)
// sleep up to a second while waiting for the peer to send us a message.
@@ -397,7 +398,7 @@ func TestPEXReactorDoesNotAddPrivatePeersToAddrBook(t *testing.T) {
pexR.RequestAddrs(peer)
size := book.Size()
addrs := []*p2p.NetAddress{peer.NodeInfo().NetAddress()}
addrs := []*p2p.NetAddress{peer.SocketAddr()}
msg := cdc.MustMarshalBinaryBare(&pexAddrsMessage{Addrs: addrs})
pexR.Receive(PexChannel, peer, msg)
assert.Equal(t, size, book.Size())
@@ -414,7 +415,7 @@ func TestPEXReactorDialPeer(t *testing.T) {
sw.SetAddrBook(book)
peer := mock.NewPeer(nil)
addr := peer.NodeInfo().NetAddress()
addr := peer.SocketAddr()
assert.Equal(t, 0, pexR.AttemptsToDial(addr))
@@ -547,7 +548,7 @@ func testCreateSeed(dir string, id int, knownAddrs, srcAddrs []*p2p.NetAddress)
// Starting and stopping the peer is left to the caller
func testCreatePeerWithSeed(dir string, id int, seed *p2p.Switch) *p2p.Switch {
conf := &PEXReactorConfig{
Seeds: []string{seed.NodeInfo().NetAddress().String()},
Seeds: []string{seed.NetAddress().String()},
}
return testCreatePeerWithConfig(dir, id, conf)
}