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* all: new p2p node representation (#17643)Felix Lange2018-09-251-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Package p2p/enode provides a generalized representation of p2p nodes which can contain arbitrary information in key/value pairs. It is also the new home for the node database. The "v4" identity scheme is also moved here from p2p/enr to remove the dependency on Ethereum crypto from that package. Record signature handling is changed significantly. The identity scheme registry is removed and acceptable schemes must be passed to any method that needs identity. This means records must now be validated explicitly after decoding. The enode API is designed to make signature handling easy and safe: most APIs around the codebase work with enode.Node, which is a wrapper around a valid record. Going from enr.Record to enode.Node requires a valid signature. * p2p/discover: port to p2p/enode This ports the discovery code to the new node representation in p2p/enode. The wire protocol is unchanged, this can be considered a refactoring change. The Kademlia table can now deal with nodes using an arbitrary identity scheme. This requires a few incompatible API changes: - Table.Lookup is not available anymore. It used to take a public key as argument because v4 protocol requires one. Its replacement is LookupRandom. - Table.Resolve takes *enode.Node instead of NodeID. This is also for v4 protocol compatibility because nodes cannot be looked up by ID alone. - Types Node and NodeID are gone. Further commits in the series will be fixes all over the the codebase to deal with those removals. * p2p: port to p2p/enode and discovery changes This adapts package p2p to the changes in p2p/discover. All uses of discover.Node and discover.NodeID are replaced by their equivalents from p2p/enode. New API is added to retrieve the enode.Node instance of a peer. The behavior of Server.Self with discovery disabled is improved. It now tries much harder to report a working IP address, falling back to 127.0.0.1 if no suitable address can be determined through other means. These changes were needed for tests of other packages later in the series. * p2p/simulations, p2p/testing: port to p2p/enode No surprises here, mostly replacements of discover.Node, discover.NodeID with their new equivalents. The 'interesting' API changes are: - testing.ProtocolSession tracks complete nodes, not just their IDs. - adapters.NodeConfig has a new method to create a complete node. These changes were needed to make swarm tests work. Note that the NodeID change makes the code incompatible with old simulation snapshots. * whisper/whisperv5, whisper/whisperv6: port to p2p/enode This port was easy because whisper uses []byte for node IDs and URL strings in the API. * eth: port to p2p/enode Again, easy to port because eth uses strings for node IDs and doesn't care about node information in any way. * les: port to p2p/enode Apart from replacing discover.NodeID with enode.ID, most changes are in the server pool code. It now deals with complete nodes instead of (Pubkey, IP, Port) triples. The database format is unchanged for now, but we should probably change it to use the node database later. * node: port to p2p/enode This change simply replaces discover.Node and discover.NodeID with their new equivalents. * swarm/network: port to p2p/enode Swarm has its own node address representation, BzzAddr, containing both an overlay address (the hash of a secp256k1 public key) and an underlay address (enode:// URL). There are no changes to the BzzAddr format in this commit, but certain operations such as creating a BzzAddr from a node ID are now impossible because node IDs aren't public keys anymore. Most swarm-related changes in the series remove uses of NewAddrFromNodeID, replacing it with NewAddr which takes a complete node as argument. ToOverlayAddr is removed because we can just use the node ID directly.
* p2p, p2p/discover, p2p/nat: rework logging using context keysFelix Lange2017-02-281-9/+11
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* all: gofmt -w -sFelix Lange2017-01-061-1/+1
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* all: fix license headers one more timeFelix Lange2015-07-241-1/+1
| | | | I forgot to update one instance of "go-ethereum" in commit 3f047be5a.
* all: update license headers to distiguish GPL/LGPLFelix Lange2015-07-231-4/+4
| | | | | All code outside of cmd/ is licensed as LGPL. The headers now reflect this by calling the whole work "the go-ethereum library".
* all: update license informationFelix Lange2015-07-071-0/+16
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* p2p: fix local/remote cap/protocol mixupPéter Szilágyi2015-06-271-23/+23
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* p2p: support protocol version negotiationPéter Szilágyi2015-06-261-0/+95
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* p2p: improve disconnect loggingFelix Lange2015-06-151-1/+1
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* p2p: new dialer, peer management without locksFelix Lange2015-05-251-12/+8
| | | | | | | | | | | | | | | | | | The most visible change is event-based dialing, which should be an improvement over the timer-based system that we have at the moment. The dialer gets a chance to compute new tasks whenever peers change or dials complete. This is better than checking peers on a timer because dials happen faster. The dialer can now make more precise decisions about whom to dial based on the peer set and we can test those decisions without actually opening any sockets. Peer management is easier to test because the tests can inject connections at checkpoints (after enc handshake, after protocol handshake). Most of the handshake stuff is now part of the RLPx code. It could be exported or move to its own package because it is no longer entangled with Server logic.
* p2p: delete Server.BroadcastFelix Lange2015-05-251-39/+0
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* p2p: remove testlogFelix Lange2015-05-141-11/+0
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* p2p: log remote reason when disconnect is requestedFelix Lange2015-05-141-6/+7
| | | | | | The returned reason is currently not used except for the log message. This change makes the log messages a bit more useful. The handshake code also returns the remote reason.
* p2p: fix Peer shutdown deadlocksFelix Lange2015-04-101-9/+65
| | | | | | | | | | There were multiple synchronization issues in the disconnect handling, all caused by the odd special-casing of Peer.readLoop errors. Remove the special handling of read errors and make readLoop part of the Peer WaitGroup. Thanks to @Gustav-Simonsson for pointing at arrows in a diagram and playing rubber-duck.
* p2p: use package rlp to encode messagesFelix Lange2015-03-191-20/+21
| | | | | | | | | | Message encoding functions have been renamed to catch any uses. The switch to the new encoder can cause subtle incompatibilities. If there are any users outside of our tree, they will at least be alerted that there was a change. NewMsg no longer exists. The replacements for EncodeMsg are called Send and SendItems.
* p2p: export ExpectMsg (for eth protocol testing)Felix Lange2015-03-191-32/+0
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* p2p: msg.Payload contains list dataFelix Lange2015-03-041-41/+2
| | | | | | | | | With RLPx frames, the message code is contained in the frame and is no longer part of the encoded data. EncodeMsg, Msg.Decode have been updated to match. Code that decodes RLP directly from Msg.Payload will need to change.
* p2p: use RLPx frames for messagingFelix Lange2015-03-041-17/+19
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* p2p: disable encryption handshakeFelix Lange2015-02-191-85/+20
| | | | | | The diff is a bit bigger than expected because the protocol handshake logic has moved out of Peer. This is necessary because the protocol handshake will have custom framing in the final protocol.
* p2p: fixes for actual connectionsFelix Lange2015-02-071-9/+10
| | | | The unit test hooks were turned on 'in production'.
* p2p: integrate p2p/discoverFelix Lange2015-02-061-135/+161
| | | | | | | | | | | | Overview of changes: - ClientIdentity has been removed, use discover.NodeID - Server now requires a private key to be set (instead of public key) - Server performs the encryption handshake before launching Peer - Dial logic takes peers from discover table - Encryption handshake code has been cleaned up a bit - baseProtocol is gone because we don't exchange peers anymore - Some parts of baseProtocol have moved into Peer instead
* eth, p2p: remove EncodeMsg from p2p.MsgWriterFelix Lange2015-01-061-2/+2
| | | | | | | | | | | | ...and make it a top-level function instead. The original idea behind having EncodeMsg in the interface was that implementations might be able to encode RLP data to their underlying writer directly instead of buffering the encoded data. The encoder will buffer anyway, so that doesn't matter anymore. Given the recent problems with EncodeMsg (copy-pasted implementation bug) I'd rather implement once, correctly.
* Mergeobscuren2015-01-061-4/+10
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* p2p: improve and test eofSignalFelix Lange2014-12-121-0/+56
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* p2p: add test for NewPeerFelix Lange2014-11-271-0/+15
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* p2p: remove Msg.Value and MsgLoopFelix Lange2014-11-251-6/+8
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* p2p: use package rlp for baseProtocolFelix Lange2014-11-251-1/+1
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* p2p: use package rlpFelix Lange2014-11-251-1/+1
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* p2p: API cleanup and PoC 7 compatibilityFelix Lange2014-11-221-88/+220
| | | | | Whoa, one more big commit. I didn't manage to untangle the changes while working towards compatibility.
* p2p: rework protocol APIFelix Lange2014-11-221-88/+82
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* initial commit of p2p packagezelig2014-10-231-0/+96