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* all: fix go vet warningsFelix Lange2016-04-151-1/+1
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* Merge pull request #2242 from jimenezrick/upstream-cryptoJeffrey Wilcke2016-02-246-13/+13
|\ | | | | Closes #2241: Use Keccak-256 from golang.org/x/crypto/sha3 and mention explicitly
| * all: Rename crypto.Sha3{,Hash}() to crypto.Keccak256{,Hash}()Ricardo Catalinas Jiménez2016-02-226-13/+13
| | | | | | | | As we aren't really using the standarized SHA-3
* | p2p/discover: emphasize warning, add 10 min cooldownPéter Szilágyi2016-02-242-18/+39
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* | psp/discovery: NTP sanity check clock drift in case of expirationsPéter Szilágyi2016-02-242-4/+128
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* p2p/discover: EIP-8 changesFelix Lange2016-02-192-1/+122
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* p2p/discover: fix Windows-specific issue for larger-than-buffer packetsFelix Lange2016-01-234-7/+124
| | | | | | | | | | On Windows, UDPConn.ReadFrom returns an error for packets larger than the receive buffer. The error is not marked temporary, causing our loop to exit when the first oversized packet arrived. The fix is to treat this particular error as temporary. Fixes: #1579, #2087 Updates: #2082
* p2p/discover: attempt to deflake TestUDP_responseTimeoutsFelix Lange2015-12-181-1/+2
| | | | | The test expected the timeout to fire after a matcher for the response was added, but the timeout is random and fired sooner sometimes.
* p2p, p2p/discover: track bootstrap state in p2p/discoverFelix Lange2015-12-183-45/+92
| | | | | | This change simplifies the dial scheduling logic because it no longer needs to track whether the discovery table has been bootstrapped.
* p2p/discover: support incomplete node URLs, add ResolveFelix Lange2015-12-187-54/+158
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* crypto, crypto/ecies, crypto/secp256k1: libsecp256k1 scalar multGustav Simonsson2015-11-301-1/+1
| | | | thanks to Felix Lange (fjl) for help with design & impl
* node: customizable protocol and service stacksPéter Szilágyi2015-11-274-13/+20
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* p2p/discover: ignore packet version numbersFelix Lange2015-09-302-5/+0
| | | | The strict matching can get in the way of protocol upgrades.
* p2p/discover: remove unused lastLookup fieldFelix Lange2015-09-301-6/+1
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* p2p/discover: fix race involving the seed node iteratorFelix Lange2015-09-305-172/+198
| | | | | | | | | | | | | | | | | | | nodeDB.querySeeds was not safe for concurrent use but could be called concurrenty on multiple goroutines in the following case: - the table was empty - a timed refresh started - a lookup was started and initiated refresh These conditions are unlikely to coincide during normal use, but are much more likely to occur all at once when the user's machine just woke from sleep. The root cause of the issue is that querySeeds reused the same leveldb iterator until it was exhausted. This commit moves the refresh scheduling logic into its own goroutine (so only one refresh is ever active) and changes querySeeds to not use a persistent iterator. The seed node selection is now more random and ignores nodes that have not been contacted in the last 5 days.
* Merge pull request #1694 from obscuren/hide-fdtrackJeffrey Wilcke2015-08-201-3/+0
|\ | | | | fdtrack: hide message
| * Revert "fdtrack: temporary hack for tracking file descriptor usage"Jeffrey Wilcke2015-08-201-3/+0
| | | | | | | | This reverts commit 5c949d3b3ba81ea0563575b19a7b148aeac4bf61.
* | p2p/discover: don't attempt to replace nodes that are being replacedFelix Lange2015-08-192-4/+15
| | | | | | | | | | | | | | | | PR #1621 changed Table locking so the mutex is not held while a contested node is being pinged. If multiple nodes ping the local node during this time window, multiple ping packets will be sent to the contested node. The changes in this commit prevent multiple packets by tracking whether the node is being replaced.
* | p2p/discover: continue reading after temporary errorsFelix Lange2015-08-191-1/+11
|/ | | | Might solve #1579
* p2p/discover: fix UDP reply packet timeout handlingFelix Lange2015-08-112-31/+120
| | | | | | | | | | | | If the timeout fired (even just nanoseconds) before the deadline of the next pending reply, the timer was not rescheduled. The timer would've been rescheduled anyway once the next packet was sent, but there were cases where no next packet could ever be sent due to the locking issue fixed in the previous commit. As timing-related bugs go, this issue had been present for a long time and I could never reproduce it. The test added in this commit did reproduce the issue on about one out of 15 runs.
* p2p/discover: unlock the table during ping replacementFelix Lange2015-08-113-52/+77
| | | | | | Table.mutex was being held while waiting for a reply packet, which effectively made many parts of the whole stack block on that packet, including the net_peerCount RPC call.
* p2p/discover: close Table during testingFelix Lange2015-08-062-4/+8
| | | | Not closing the table used to be fine, but now the table has a database.
* fdtrack: temporary hack for tracking file descriptor usageFelix Lange2015-08-041-0/+3
| | | | | Package fdtrack logs statistics about open file descriptors. This should help identify the source of #1549.
* all: fix license headers one more timeFelix Lange2015-07-248-8/+8
| | | | I forgot to update one instance of "go-ethereum" in commit 3f047be5a.
* all: update license headers to distiguish GPL/LGPLFelix Lange2015-07-238-32/+32
| | | | | 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 Lange2015-07-078-0/+128
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* p2p/discover: use separate rand.Source instances in testsFelix Lange2015-06-102-15/+19
| | | | rand.Source isn't safe for concurrent use.
* p2p/discover: deflake TestUDP_successfulPingFelix Lange2015-06-102-33/+30
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* p2p/discover: bond with seed nodes too (runs only if findnode failed)Péter Szilágyi2015-05-271-7/+4
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* p2p/discovery: fix a cornercase loop if no seeds or bootnodes are knownPéter Szilágyi2015-05-271-5/+9
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* p2p/discover: force refresh if the table is emptyPéter Szilágyi2015-05-271-13/+41
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* p2p/discover: permit temporary bond failures for previously known nodesPéter Szilágyi2015-05-271-12/+15
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* p2p/discover: watch find failures, evacuate on too many, rebond if failedPéter Szilágyi2015-05-271-8/+47
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* p2p/discover: add support for counting findnode failuresPéter Szilágyi2015-05-272-3/+25
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* p2p/discover: add ReadRandomNodesFelix Lange2015-05-252-1/+83
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* p2p/discover: fix #838, evacuate self entries from the node dbPéter Szilágyi2015-05-223-25/+99
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* p2p/discover: fix database presistency test folderPéter Szilágyi2015-05-221-3/+3
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* p2p/discover: limit open files for node databaseFelix Lange2015-05-141-2/+3
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* p2p/discover: bump maxBondingPingPongs to 16Felix Lange2015-05-141-1/+1
| | | | | This should increase the speed a bit because all findnode results (up to 16) can be verified at the same time.
* p2p/discover: fix out-of-bounds slicing for chunked neighbors packetsFelix Lange2015-05-142-32/+49
| | | | | The code assumed that Table.closest always returns at least 13 nodes. This is not true for small tables (e.g. during bootstrap).
* fix test.subtly2015-05-141-1/+1
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* Manual send of multiple neighbours packets. Test receiving multiple ↵subtly2015-05-142-3/+19
| | | | neighbours packets.
* UDP Interop. Limit datagrams to 1280bytes.subtly2015-05-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We don't have a UDP which specifies any messages that will be 4KB. Aside from being implemented for months and a necessity for encryption and piggy-backing packets, 1280bytes is ideal, and, means this TODO can be completed! Why 1280 bytes? * It's less than the default MTU for most WAN/LAN networks. That means fewer fragmented datagrams (esp on well-connected networks). * Fragmented datagrams and dropped packets suck and add latency while OS waits for a dropped fragment to never arrive (blocking readLoop()) * Most of our packets are < 1280 bytes. * 1280 bytes is minimum datagram size and MTU for IPv6 -- on IPv6, a datagram < 1280bytes will *never* be fragmented. UDP datagrams are dropped. A lot! And fragmented datagrams are worse. If a datagram has a 30% chance of being dropped, then a fragmented datagram has a 60% chance of being dropped. More importantly, we have signed packets and can't do anything with a packet unless we receive the entire datagram because the signature can't be verified. The same is true when we have encrypted packets. So the solution here to picking an ideal buffer size for receiving datagrams is a number under 1400bytes. And the lower-bound value for IPv6 of 1280 bytes make's it a non-decision. On IPv4 most ISPs and 3g/4g/let networks have an MTU just over 1400 -- and *never* over 1500. Never -- that means packets over 1500 (in reality: ~1450) bytes are fragmented. And probably dropped a lot. Just to prove the point, here are pings sending non-fragmented packets over wifi/ISP, and a second set of pings via cell-phone tethering. It's important to note that, if *any* router between my system and the EC2 node has a lower MTU, the message would not go through: On wifi w/normal ISP: localhost:Debug $ ping -D -s 1450 52.6.250.242 PING 52.6.250.242 (52.6.250.242): 1450 data bytes 1458 bytes from 52.6.250.242: icmp_seq=0 ttl=42 time=104.831 ms 1458 bytes from 52.6.250.242: icmp_seq=1 ttl=42 time=119.004 ms ^C --- 52.6.250.242 ping statistics --- 2 packets transmitted, 2 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 104.831/111.918/119.004/7.087 ms localhost:Debug $ ping -D -s 1480 52.6.250.242 PING 52.6.250.242 (52.6.250.242): 1480 data bytes ping: sendto: Message too long ping: sendto: Message too long Request timeout for icmp_seq 0 ping: sendto: Message too long Request timeout for icmp_seq 1 Tethering to O2: localhost:Debug $ ping -D -s 1480 52.6.250.242 PING 52.6.250.242 (52.6.250.242): 1480 data bytes ping: sendto: Message too long ping: sendto: Message too long Request timeout for icmp_seq 0 ^C --- 52.6.250.242 ping statistics --- 2 packets transmitted, 0 packets received, 100.0% packet loss localhost:Debug $ ping -D -s 1450 52.6.250.242 PING 52.6.250.242 (52.6.250.242): 1450 data bytes 1458 bytes from 52.6.250.242: icmp_seq=0 ttl=42 time=107.844 ms 1458 bytes from 52.6.250.242: icmp_seq=1 ttl=42 time=105.127 ms 1458 bytes from 52.6.250.242: icmp_seq=2 ttl=42 time=120.483 ms 1458 bytes from 52.6.250.242: icmp_seq=3 ttl=42 time=102.136 ms
* removed redundant newlines in import blockBas van Kervel2015-05-121-1/+1
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* replaced several path.* with filepath.* which is platform independentBas van Kervel2015-05-121-2/+2
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* p2p/discover: bump packet timeouts to 500msFelix Lange2015-05-071-2/+2
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* p2p/discover: new distance metric based on sha3(id)Felix Lange2015-05-066-106/+354
| | | | | | | The previous metric was pubkey1^pubkey2, as specified in the Kademlia paper. We missed that EC public keys are not uniformly distributed. Using the hash of the public keys addresses that. It also makes it a bit harder to generate node IDs that are close to a particular node.
* p2p/discover: track sha3(ID) in NodeFelix Lange2015-04-308-99/+166
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* p2p, p2p/discover: protocol version 4Felix Lange2015-04-301-1/+1
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* p2p/discover: new endpoint formatFelix Lange2015-04-307-119/+150
| | | | | | This commit changes the discovery protocol to use the new "v4" endpoint format, which allows for separate UDP and TCP ports and makes it possible to discover the UDP address after NAT.
* p2p/discover: fix api issues caused by leveldb updatePéter Szilágyi2015-04-281-4/+6
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* p2p/discover: fix goroutine leak due to blocking on sync.OncePéter Szilágyi2015-04-282-13/+24
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* p2p/discover: add node expirer and related testsPéter Szilágyi2015-04-273-4/+116
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* p2p/discover: parametrize nodedb version, add persistency testsPéter Szilágyi2015-04-273-11/+62
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* p2p/discover: drop a superfluous warningPéter Szilágyi2015-04-271-1/+1
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* p2p/discover: wrap the pinger to update the node db tooPéter Szilágyi2015-04-271-4/+15
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* p2p/discover: use iterator based seeding, drop old protocol testPéter Szilágyi2015-04-272-45/+118
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* p2p/discover: write the basic tests, catch RLP bugPéter Szilágyi2015-04-273-8/+150
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* p2p/discovery: fix issues raised in the nodeDb PRPéter Szilágyi2015-04-272-36/+32
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* cmd/bootnode, eth, p2p, p2p/discover: use a fancier db designPéter Szilágyi2015-04-246-156/+273
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* cmd/bootnode, eth, p2p, p2p/discover: clean up the seeder and mesh into eth.Péter Szilágyi2015-04-246-137/+154
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* p2p/discovery: fix broken tests due to API updatePéter Szilágyi2015-04-242-4/+4
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* p2p/discovery: use the seed table for finding nodes, auto drop stale onesPéter Szilágyi2015-04-242-5/+38
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* cmd, eth, p2p, p2p/discover: init and clean up the seed cachePéter Szilágyi2015-04-243-7/+21
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* p2p/discover: store nodes in leveldbFelix Lange2015-04-242-13/+73
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* p2p/discover: use rlp.DecodeBytesFelix Lange2015-04-171-1/+1
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* p2p/discover: improve timer handling for reply timeoutsFelix Lange2015-04-141-2/+3
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* p2p/discover: remove unused field Node.activeStampFelix Lange2015-04-132-16/+0
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* p2p/discover: don't log packet contentFelix Lange2015-04-101-3/+4
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* p2p/discover: make packet processing less concurrentFelix Lange2015-04-101-6/+4
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* Updated loggingobscuren2015-04-071-10/+9
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* p2p/discover: fix off by one error causing buckets to contain duplicatesFelix Lange2015-04-012-1/+43
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* p2p/discover: implement node bondingFelix Lange2015-04-015-383/+649
| | | | | | | | | | | | | | | | This a fix for an attack vector where the discovery protocol could be used to amplify traffic in a DDOS attack. A malicious actor would send a findnode request with the IP address and UDP port of the target as the source address. The recipient of the findnode packet would then send a neighbors packet (which is 16x the size of findnode) to the victim. Our solution is to require a 'bond' with the sender of findnode. If no bond exists, the findnode packet is not processed. A bond between nodes α and β is created when α replies to a ping from β. This (initial) version of the bonding implementation might still be vulnerable against replay attacks during the expiration time window. We will add stricter source address validation later.
* p2p/discover: add version number to ping packetFelix Lange2015-04-011-0/+8
| | | | | | The primary motivation for doing this right now is that old PoC 8 nodes and newer PoC 9 nodes keep discovering each other, causing handshake failures.
* %#x => %xobscuren2015-03-201-2/+2
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* p2p: server>discover table Self=Node exportedzelig2015-03-151-3/+3
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* p2p/discover: add NodeID.PubkeyFelix Lange2015-03-042-0/+33
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* p2p/discover: fix pending replies iterationFelix Lange2015-02-171-1/+2
| | | | | | Range expressions capture the length of the slice once before the first iteration. A range expression cannot be used here since the loop modifies the slice variable (including length changes).
* p2p/discover: fix race in ListenUDPFelix Lange2015-02-131-24/+17
| | | | | udp.Table was assigned after the readLoop started, so packets could arrive and be processed before the Table was there.
* p2p/discover: map listening port using configured mechanismFelix Lange2015-02-132-13/+24
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* p2p/discover: code review fixesFelix Lange2015-02-133-7/+9
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* p2p/discover: deflake UDP testsFelix Lange2015-02-094-59/+123
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* cmd/ethereum, cmd/mist: add flag for discovery bootstrap nodesFelix Lange2015-02-071-2/+2
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* p2p/discover: add node URL functions, distinguish TCP/UDP portsFelix Lange2015-02-076-321/+527
| | | | | The discovery RPC protocol does not yet distinguish TCP and UDP ports. But it can't hurt to do so in our internal model.
* p2p/discover: add some helper functionsFelix Lange2015-02-064-20/+41
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* p2p/discover: new package implementing the Node Discovery ProtocolFelix Lange2015-02-064-0/+1428