Commit Graph

412 Commits

Author SHA1 Message Date
ferhat elmas
5866626b08 core, p2p/discv5: use time.NewTicker instead of time.Tick (#15747) 2018-01-02 12:50:46 +01:00
Anton Evangelatov
36a10875c8 p2p/enr: initial implementation (#15585)
Initial implementation of ENR according to ethereum/EIPs#778
2017-12-29 21:18:51 +01:00
Péter Szilágyi
c15d76a40f p2p/discv5: fix reg lookup, polish code, use logger (#15737) 2017-12-28 14:17:03 +01:00
ferhat elmas
afa3c72c40 p2p/discover: fix leaked goroutine in data expiration 2017-12-18 09:16:54 +01:00
Felix Lange
3654aeaa4f
p2p/simulations: fix gosimple nit (#15661) 2017-12-13 03:15:27 +01:00
holisticode
fd777bb210 p2p/simulations: add mocker functionality (#15207)
This commit adds mocker functionality to p2p/simulations. A
mocker allows to starting/stopping of nodes via the HTTP API.
2017-12-12 19:10:41 +01:00
Zach
3da1bf8ca1 all: use gometalinter.v2, fix new gosimple issues (#15650) 2017-12-12 19:05:47 +01:00
ferhat elmas
1d06e41f04 p2p, swarm/network/kademlia: use IsZero to check for zero time (#15603) 2017-12-04 11:07:10 +01:00
Lewis Marshall
54aeb8e4c0 p2p/simulations: various stability fixes (#15198)
p2p/simulations: introduce dialBan

- Refactor simulations/network connection getters to support
  avoiding simultaneous dials between two peers If two peers dial
  simultaneously, the connection will be dropped to help avoid
  that, we essentially lock the connection object with a
  timestamp which serves as a ban on dialing for a period of time
  (dialBanTimeout).

- The connection getter InitConn can be wrapped and passed to the
  nodes via adapters.NodeConfig#Reachable field and then used by
  the respective services when they initiate connections. This
  massively stablise the emerging connectivity when running with
  hundreds of nodes bootstrapping a network.

p2p: add Inbound public method to p2p.Peer

p2p/simulations: Add server id to logs to support debugging
in-memory network simulations when multiple peers are logging.

p2p: SetupConn now returns error. The dialer checks the error and
only calls resolve if the actual TCP dial fails.
2017-12-01 12:49:04 +01:00
ferhat elmas
86f6568f66 build: enable unconvert linter (#15456)
* build: enable unconvert linter

 - fixes #15453
 - update code base for failing cases

* cmd/puppeth: replace syscall.Stdin with os.Stdin.Fd() for unconvert linter
2017-11-10 19:06:45 +02:00
Darrel Herbst
d54e3539d4 p2p/nat: delete port mapping before adding (#15222)
Fixes #1024
2017-10-06 13:39:47 +02:00
Péter Szilágyi
2ee885958b p2p: snappy encoding for devp2p (version bump to 5) (#15106)
* p2p: snappy encoding for devp2p (version bump to 5)

* p2p: remove lazy decompression, enforce 16MB limit
2017-09-26 16:54:49 +03:00
Lewis Marshall
9feec51e2d p2p: add network simulation framework (#14982)
This commit introduces a network simulation framework which
can be used to run simulated networks of devp2p nodes. The
intention is to use this for testing protocols, performing
benchmarks and visualising emergent network behaviour.
2017-09-25 10:08:07 +02:00
Martin Holst Swende
dc92779c0a p2p: change ping ticker to timer (#15071)
Using a Timer over Ticker seems to be a lot better, though I cannot fully
account for why that it behaves so (since Ticker should be more bursty, but not
necessarily more active over time, but that may depend on how long window it
uses to decide on when to tick next)
2017-09-04 09:24:52 +02:00
Ali Hajimirza
33b158e0ed discover: Changed Logging from Debug to Info (#14485) 2017-05-20 13:10:59 +02:00
Felix Lange
30d706c35e cmd/geth: add --config file flag (#13875)
* p2p/discover, p2p/discv5: add marshaling methods to Node

* p2p/netutil: make Netlist decodable from TOML

* common/math: encode nil HexOrDecimal256 as 0x0

* cmd/geth: add --config file flag

* cmd/geth: add missing license header

* eth: prettify Config again, fix tests

* eth: use gasprice.Config instead of duplicating its fields

* eth/gasprice: hide nil default from dumpconfig output

* cmd/geth: hide genesis block in dumpconfig output

* node: make tests compile

* console: fix tests

* cmd/geth: make TOML keys look exactly like Go struct fields

* p2p: use discovery by default

This makes the zero Config slightly more useful. It also fixes package
node tests because Node detects reuse of the datadir through the
NodeDatabase.

* cmd/geth: make ethstats URL settable through config file

* cmd/faucet: fix configuration

* cmd/geth: dedup attach tests

* eth: add comment for DefaultConfig

* eth: pass downloader.SyncMode in Config

This removes the FastSync, LightSync flags in favour of a more
general SyncMode flag.

* cmd/utils: remove jitvm flags

* cmd/utils: make mutually exclusive flag error prettier

It now reads:

   Fatal: flags --dev, --testnet can't be used at the same time

* p2p: fix typo

* node: add DefaultConfig, use it for geth

* mobile: add missing NoDiscovery option

* cmd/utils: drop MakeNode

This exposed a couple of places that needed to be updated to use
node.DefaultConfig.

* node: fix typo

* eth: make fast sync the default mode

* cmd/utils: remove IPCApiFlag (unused)

* node: remove default IPC path

Set it in the frontends instead.

* cmd/geth: add --syncmode

* cmd/utils: make --ipcdisable and --ipcpath mutually exclusive

* cmd/utils: don't enable WS, HTTP when setting addr

* cmd/utils: fix --identity
2017-04-12 17:27:23 +03:00
Péter Szilágyi
04fcae207d p2p: if no nodes are connected, attempt dialing bootnodes (#13874) 2017-04-10 18:33:41 +02:00
Felix Lange
96ae35e2ac p2p, p2p/discover, p2p/nat: rework logging using context keys 2017-02-28 10:20:29 +01:00
Felix Lange
d0eba23af3 all: disable log message colors outside of geth
Also tweak behaviour so colors are only enabled when stderr is a terminal.
2017-02-27 15:33:12 +01:00
Péter Szilágyi
d4fd06c3dc
all: blidly swap out glog to our log15, logs need rework 2017-02-23 12:16:44 +02:00
Péter Szilágyi
189dee26c6
p2p: remove trailing newlines from log messages 2017-02-23 12:00:04 +02:00
Felix Lange
9b0af51386 crypto: add btcec fallback for sign/recover without cgo (#3680)
* vendor: add github.com/btcsuite/btcd/btcec

* crypto: add btcec fallback for sign/recover without cgo

This commit adds a non-cgo fallback implementation of secp256k1
operations.

* crypto, core/vm: remove wrappers for sha256, ripemd160
2017-02-18 09:24:12 +01:00
Felix Lange
b9b3efb09f all: fix ineffectual assignments and remove uses of crypto.Sha3
go get github.com/gordonklaus/ineffassign
ineffassign .
2017-01-09 16:24:42 +01:00
Péter Szilágyi
18c77744ff
all: fix spelling errors 2017-01-06 19:44:35 +02:00
Felix Lange
13e3b2f433 logger, pow/dagger, pow/ezp: delete dead code 2017-01-06 18:18:07 +01:00
Felix Lange
f2da6581ba all: fix issues reported by honnef.co/go/simple/cmd/gosimple 2017-01-06 18:18:07 +01:00
Felix Lange
35a7dcb162 all: gofmt -w -s 2017-01-06 15:52:03 +01:00
Péter Szilágyi
21fd9f037e
p2p/nat: fix a bytes based net.IP comparison 2016-12-15 16:28:31 +02:00
Péter Szilágyi
2573094df2
p2p/discover, p2p/discv5: use flexible comparison for IPs 2016-12-14 18:40:49 +02:00
Zsolt Felfoldi
a6d3bf6fc3 p2p/discv5: search and lookup improvement 2016-12-08 13:38:15 +01:00
Felix Lange
a47341cf96 p2p, p2p/discover, p2p/discv5: add IP network restriction feature
The p2p packages can now be configured to restrict all communication to
a certain subset of IP networks. This feature is meant to be used for
private networks.
2016-11-22 22:21:18 +01:00
Felix Lange
a98d1d67d6 p2p/discover, p2p/discv5: prevent relay of invalid IPs and low ports
The discovery DHT contains a number of hosts with LAN and loopback IPs.
These get relayed because some implementations do not perform any checks
on the IP.

go-ethereum already prevented relay in most cases because it verifies
that the host actually exists before adding it to the local table. But
this verification causes other issues. We have received several reports
where people's VPSs got shut down by hosting providers because sending
packets to random LAN hosts is indistinguishable from a slow port scan.

The new check prevents sending random packets to LAN by discarding LAN
IPs sent by Internet hosts (and loopback IPs from LAN and Internet
hosts). The new check also blacklists almost all currently registered
special-purpose networks assigned by IANA to avoid inciting random
responses from services in the LAN.

As another precaution against abuse of the DHT, ports below 1024 are now
considered invalid.
2016-11-22 22:21:18 +01:00
Felix Lange
ba2884f343 p2p/discover, p2p/discv5: use netutil.IsTemporaryError 2016-11-22 22:21:15 +01:00
Felix Lange
1d80155d5e p2p/netutil: new package for network utilities
The new package contains three things for now:

- IP network list parsing and matching
- The WSAEMSGSIZE workaround, which is duplicated in p2p/discover and
  p2p/discv5.
2016-11-22 22:20:38 +01:00
Péter Szilágyi
b61f48e5aa
cmd, mobile, node, p2p: surface the discovery V5 bootnodes 2016-11-14 18:00:14 +02:00
Péter Szilágyi
178da7c6a9
mobile: initial wrappers for mobile support 2016-11-14 17:56:58 +02:00
Zsolt Felfoldi
1f70b279ba p2p/discv5: added new bootnodes 2016-11-14 13:22:19 +01:00
Zsolt Felfoldi
e33e57684f p2p/discv5: fixed bootnode connect issues 2016-11-14 13:22:19 +01:00
Zsolt Felfoldi
09baeec0da discv5: fixed state machine lockup bug 2016-11-11 03:10:46 +01:00
Felix Lange
b8bd9a71c8 all: update license information 2016-11-09 02:51:34 +01:00
Felix Lange
0f19cbc6e5 p2p/discv5: fix build with Go 1.5, delete package testimg 2016-11-09 02:18:48 +01:00
Zsolt Felfoldi
49da42983a p2p/discv5: added new topic discovery package 2016-11-09 02:12:53 +01:00
Felix Lange
44bc2e80dd Merge pull request #2914 from fjl/node-coinhabit
cmd/utils, node: make datadir reusable for bzzd
2016-09-29 14:24:37 +02:00
ken10100147
afecb93e2e p2p/nat: fix parameter order for AddMapping 2016-09-28 12:11:58 +02:00
Felix Lange
f5c432bcab p2p/nat: delay auto discovery until first use
Port mapper auto discovery used to run immediately after parsing the
--nat flag, giving it a slight performance boost. But this is becoming
inconvenient because we create node.Node for all geth operations
including account management and bare chain interaction. Delay
autodiscovery until the first use instead, which avoids any network
interaction until the node is actually started.
2016-09-16 11:06:52 +02:00
Felix Lange
b8ba80bff7 Merge pull request #2740 from Firescar96/removepeer
node, p2p, internal: Add ability to remove peers via admin interface
2016-07-29 12:34:28 +02:00
Firescar96
4c3da0f2e1 node, p2p, internal: Add ability to remove peers via admin interface 2016-07-14 18:51:41 -04:00
villesundell
c7442ef0d2 ethdb, p2p/discover: replace "alloted" with "allotted" (#2785) 2016-07-12 11:42:47 +02:00
Felix Lange
542b839ec7 node, p2p: move network config out of Server
This silences a go vet message about copying p2p.Server in package node.
2016-05-18 12:19:04 +02:00
Felix Lange
8110671960 p2p/discover: prevent bonding self 2016-05-02 18:50:16 +02:00
Felix Lange
32bb280179 p2p: improve readability of dial task scheduling code 2016-05-02 18:50:15 +02:00
Felix Lange
6fdd0893c3 all: fix go vet warnings 2016-04-15 11:17:27 +02:00
Felix Lange
659c0cb9e8 p2p: enable EIP-8 handshake sending
With the Ethereum Homestead fork is now behind us, we can
assume that everyone runs an EIP-8 capable client.
2016-04-03 23:10:11 +02:00
Péter Szilágyi
64c8e2f2ca p2p/nat: fix #2291, NAT discovery did't abort on failure 2016-03-14 17:08:15 +02:00
Jeffrey Wilcke
483feb0d3f Merge pull request #2242 from jimenezrick/upstream-crypto
Closes #2241: Use Keccak-256 from golang.org/x/crypto/sha3 and mention explicitly
2016-02-24 12:57:57 +01:00
Péter Szilágyi
ac954f48bd p2p/discover: emphasize warning, add 10 min cooldown 2016-02-24 12:16:28 +02:00
Péter Szilágyi
b1908f6a16 psp/discovery: NTP sanity check clock drift in case of expirations 2016-02-24 12:14:15 +02:00
Ricardo Catalinas Jiménez
436fc8d76a all: Rename crypto.Sha3{,Hash}() to crypto.Keccak256{,Hash}()
As we aren't really using the standarized SHA-3
2016-02-21 22:34:34 +00:00
Felix Lange
7d8155714b p2p: EIP-8 changes 2016-02-19 11:14:48 +01:00
Felix Lange
ee1debda53 p2p/discover: EIP-8 changes 2016-02-19 11:14:42 +01:00
Felix Lange
2871781f64 p2p/discover: fix Windows-specific issue for larger-than-buffer packets
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
2016-01-22 23:44:25 +01:00
Felix Lange
b3f1f4c673 p2p/discover: attempt to deflake TestUDP_responseTimeouts
The test expected the timeout to fire after a matcher for the response
was added, but the timeout is random and fired sooner sometimes.
2015-12-17 23:44:56 +01:00
Felix Lange
6c41e675ec p2p: resolve incomplete dial targets
This change makes it possible to add peers without providing their IP
address. The endpoint of the target node is resolved using the discovery
protocol.
2015-12-17 23:39:49 +01:00
Felix Lange
04c6369a09 p2p, p2p/discover: track bootstrap state in p2p/discover
This change simplifies the dial scheduling logic because it
no longer needs to track whether the discovery table has been
bootstrapped.
2015-12-17 23:38:54 +01:00
Felix Lange
d1f507b7f1 p2p/discover: support incomplete node URLs, add Resolve 2015-12-17 23:38:54 +01:00
Péter Szilágyi
abb53644c6 p2p: always allow dynamic dials if network not disabled 2015-12-03 11:45:35 +02:00
Gustav Simonsson
c8ad64f33c crypto, crypto/ecies, crypto/secp256k1: libsecp256k1 scalar mult
thanks to Felix Lange (fjl) for help with design & impl
2015-11-30 13:43:32 +01:00
Péter Szilágyi
9e1d9bff3b node: customizable protocol and service stacks 2015-11-27 11:06:12 +02:00
Jeffrey Wilcke
e165c2d23c Merge pull request #1934 from karalabe/polish-protocol-infos
eth, p2p, rpc/api: polish protocol info gathering
2015-11-04 11:59:31 +01:00
Felix Lange
f570b68ed1 p2p/nat: add docs for discover 2015-10-29 22:54:44 +01:00
Felix Lange
bf11a47f22 Godeps: upgrade github.com/huin/goupnp to 90f71cb5 2015-10-29 22:53:59 +01:00
Péter Szilágyi
e46ab3bdcd eth, p2p, rpc/api: polish protocol info gathering 2015-10-28 12:44:15 +02:00
Felix Lange
32dda97602 p2p/discover: ignore packet version numbers
The strict matching can get in the way of protocol upgrades.
2015-09-30 16:23:03 +02:00
Felix Lange
631bf36102 p2p/discover: remove unused lastLookup field 2015-09-30 16:23:03 +02:00
Felix Lange
b4374436f3 p2p/discover: fix race involving the seed node iterator
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.
2015-09-30 16:23:03 +02:00
Péter Szilágyi
c51e153b5c eth, metrics, p2p: prepare metrics and net packets to eth/62 2015-08-21 10:30:57 +03:00
Jeffrey Wilcke
e2d44814a5 Merge pull request #1694 from obscuren/hide-fdtrack
fdtrack: hide message
2015-08-19 13:50:54 -07:00
Jeffrey Wilcke
269c5c7107 Revert "fdtrack: temporary hack for tracking file descriptor usage"
This reverts commit 5c949d3b3b.
2015-08-19 21:46:01 +02:00
Felix Lange
dd54fef898 p2p/discover: don't attempt to replace nodes that are being replaced
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.
2015-08-19 14:57:16 +02:00
Felix Lange
edccc7ae34 p2p: continue listening after temporary errors 2015-08-19 14:39:04 +02:00
Felix Lange
7d5ff770e2 p2p/discover: continue reading after temporary errors
Might solve #1579
2015-08-19 14:38:55 +02:00
Felix Lange
a89cfe92cc Merge pull request #1470 from ebuchman/encHandshake
p2p: validate recovered ephemeral pubkey
2015-08-13 11:59:27 +02:00
Felix Lange
0d10d5a0a5 p2p: fix value of DiscSubprotocolError
We had the wrong value (12) since forever.
2015-08-12 14:15:54 +02:00
Felix Lange
590c99a98f p2p/discover: fix UDP reply packet timeout handling
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.
2015-08-11 11:42:17 +02:00
Felix Lange
01ed3fa1a9 p2p/discover: unlock the table during ping replacement
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.
2015-08-11 11:42:17 +02:00
Felix Lange
6ee908848c p2p/nat: disable UPnP test on windows 2015-08-06 17:18:59 +02:00
Felix Lange
b23b4dbd79 p2p/discover: close Table during testing
Not closing the table used to be fine, but now the table has a database.
2015-08-06 12:27:59 +02:00
Felix Lange
5c949d3b3b fdtrack: temporary hack for tracking file descriptor usage
Package fdtrack logs statistics about open file descriptors.
This should help identify the source of #1549.
2015-08-04 03:10:27 +02:00
Felix Lange
bfbcfbe4a9 all: fix license headers one more time
I forgot to update one instance of "go-ethereum" in commit 3f047be5a.
2015-07-23 18:35:11 +02:00
Felix Lange
3f047be5aa all: update license headers to distiguish GPL/LGPL
All code outside of cmd/ is licensed as LGPL. The headers
now reflect this by calling the whole work "the go-ethereum library".
2015-07-22 18:51:45 +02:00
Ethan Buchman
37efd08b42 p2p: validate recovered ephemeral pubkey against checksum in decodeAuthMsg 2015-07-14 03:06:44 +00:00
Felix Lange
bdae4fd573 all: add some godoc synopsis comments 2015-07-07 14:12:45 +02:00
Felix Lange
ea54283b30 all: update license information 2015-07-07 14:12:44 +02:00
Péter Szilágyi
01fe972113 cmd, core, eth, metrics, p2p: require enabling metrics 2015-06-30 00:51:46 +02:00
Péter Szilágyi
216fc267fa p2p: fix local/remote cap/protocol mixup 2015-06-26 20:45:13 +03:00
Péter Szilágyi
d84638bd31 p2p: support protocol version negotiation 2015-06-26 15:48:50 +03:00
Péter Szilágyi
6994a3daaa p2p: instrument P2P networking layer 2015-06-24 18:33:33 +03:00
Felix Lange
6fb810adaa p2p: throttle all discovery lookups
Lookup calls would spin out of control when network connectivity was
lost. The throttling that was in place only took effect when the table
returned zero results, which doesn't happen very often.

The new throttling should not have a negative impact when the host is
online. Lookups against the network take some time and dials for all
results must complete or hit the cache before a new one is started. This
usually takes longer than four seconds, leaving online lookups
unaffected.

Fixes #1296
2015-06-22 01:07:58 +02:00
Felix Lange
70da79f04c p2p: improve disconnect logging 2015-06-15 15:03:46 +02:00
Felix Lange
8dcbdcad0a p2p: track write errors and prevent writes during shutdown
As of this commit, we no longer rely on the protocol handler to report
write errors in a timely fashion. When a write fails, shutdown is
initiated immediately and no new writes can start. This will also
prevent new writes from starting after Server.Stop has been called.
2015-06-15 15:03:46 +02:00
Felix Lange
a8e4cb6dfe p2p/discover: use separate rand.Source instances in tests
rand.Source isn't safe for concurrent use.
2015-06-10 15:18:01 +02:00
Felix Lange
261a8077c4 p2p/discover: deflake TestUDP_successfulPing 2015-06-10 13:08:21 +02:00
Péter Szilágyi
1cbbfbe7fa p2p: fix a close race in the dial test 2015-06-09 22:26:26 +03:00
Felix Lange
3239aca69b p2p: bump global write timeout to 20s
The previous value of 5 seconds causes timeouts for legitimate messages
if large messages are sent.
2015-06-09 17:07:10 +02:00
Péter Szilágyi
ff84352fb7 p2p: fix close data race 2015-06-09 16:12:24 +03:00
Felix Lange
fc6a5ae3ec p2p/nat: add timeout for UPnP SOAP requests 2015-06-04 22:25:43 +02:00
Felix Lange
8e4512a5e7 p2p/nat: bump timeout in TestAutoDiscRace 2015-05-28 01:09:26 +02:00
Péter Szilágyi
612f01400f p2p/discover: bond with seed nodes too (runs only if findnode failed) 2015-05-26 23:30:41 +02:00
Péter Szilágyi
3630432dfb p2p/discovery: fix a cornercase loop if no seeds or bootnodes are known 2015-05-26 23:30:40 +02:00
Péter Szilágyi
f539ed1e66 p2p/discover: force refresh if the table is empty 2015-05-26 23:30:40 +02:00
Péter Szilágyi
5076170f34 p2p/discover: permit temporary bond failures for previously known nodes 2015-05-26 23:30:40 +02:00
Péter Szilágyi
6078aa08eb p2p/discover: watch find failures, evacuate on too many, rebond if failed 2015-05-26 23:30:40 +02:00
Péter Szilágyi
64174f196f p2p/discover: add support for counting findnode failures 2015-05-26 23:30:40 +02:00
Péter Szilágyi
68898a4d6b p2p: fix Self() panic if listening is disabled 2015-05-26 19:16:05 +03:00
Péter Szilágyi
e1a0ee8fc5 cmd/geth, cmd/utils, eth, p2p: pass and honor a no discovery flag 2015-05-26 19:07:24 +03:00
Péter Szilágyi
278183c7e7 eth, p2p: start the p2p server even if maxpeers == 0 2015-05-26 17:49:37 +03:00
Felix Lange
9e1fd70b50 p2p: decrease frameReadTimeout to 30s
This detects hanging connections sooner. We send a ping every 15s and
other implementation have similar limits.
2015-05-25 01:17:14 +02:00
Felix Lange
1440f9a37a p2p: new dialer, peer management without locks
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.
2015-05-25 01:17:14 +02:00
Felix Lange
9f38ef5d97 p2p/discover: add ReadRandomNodes 2015-05-25 01:17:14 +02:00
Felix Lange
64564da20b p2p: decrease maximum message size for devp2p to 1kB
The previous limit was 10MB which is unacceptable for all kinds
of reasons, the most important one being that we don't want to
allow the remote side to make us allocate 10MB at handshake time.
2015-05-25 01:17:14 +02:00
Felix Lange
dbdc5fd4b3 p2p: delete Server.Broadcast 2015-05-25 01:17:14 +02:00
Péter Szilágyi
cbd3ae6906 p2p/discover: fix #838, evacuate self entries from the node db 2015-05-21 19:41:46 +03:00
Péter Szilágyi
af24c271c7 p2p/discover: fix database presistency test folder 2015-05-21 19:28:10 +03:00
Jeffrey Wilcke
90b94e64fc Merge pull request #971 from fjl/p2p-limit-tweaks
p2p: tweak connection limits
2015-05-14 08:15:51 -07:00
Felix Lange
d2f119cf9b p2p/discover: limit open files for node database 2015-05-14 15:01:13 +02:00
Felix Lange
206fe25971 p2p: remove testlog 2015-05-14 14:56:34 +02:00
Felix Lange
7fa2607bd1 p2p/discover: bump maxBondingPingPongs to 16
This should increase the speed a bit because all findnode
results (up to 16) can be verified at the same time.
2015-05-14 14:53:29 +02:00
Felix Lange
691cb90284 p2p: log remote reason when disconnect is requested
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.
2015-05-14 14:53:29 +02:00
Felix Lange
c14de2e973 p2p/nat: tweak port mapping log messages and levels
People stil get confused about the messages. This commit changes
the levels so that the only thing printed at the default level (info)
is a successful mapping.
2015-05-14 12:54:59 +02:00
Felix Lange
663d4e0aff p2p/nat: add test for UPnP auto discovery via SSDP
The test listens for multicast UDP packets on the default interface
because I couldn't get it to work reliably on loopback without massive
changes to goupnp. This means that the test might fail when there is a
UPnP-enabled router attached on that interface. I checked that locally
by looping the test and it passes reliably because the local SSDP server
always responds faster.
2015-05-14 12:13:19 +02:00
Felix Lange
983f5a717a p2p/nat: fix concurrent access to autodisc Interface
Concurrent calls to Interface methods on autodisc could return a "not
discovered" error if the discovery did not finish before the call.
autodisc.wait expected the done channel to carry the found Interface
but it was closed instead.

The fix is to use sync.Once for now, which is easier to get right.
And there is a test. Finally.

This will have to change again when we introduce re-discovery.
2015-05-14 03:53:11 +02:00
Felix Lange
7efeb4bd96 p2p: bump maxAcceptConns and defaultDialTimout
On the test network, we've seen that it becomes harder to connect
if the queues are so short.
2015-05-14 03:48:28 +02:00
Felix Lange
251846d65a p2p/discover: fix out-of-bounds slicing for chunked neighbors packets
The code assumed that Table.closest always returns at least 13 nodes.
This is not true for small tables (e.g. during bootstrap).
2015-05-13 21:49:04 +02:00
subtly
8eef2b765a fix test. 2015-05-13 20:15:01 +02:00
subtly
a32693770c Manual send of multiple neighbours packets. Test receiving multiple neighbours packets. 2015-05-13 20:03:17 +02:00
subtly
7473c93668 UDP Interop. Limit datagrams to 1280bytes.
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
2015-05-13 19:03:00 +02:00
Bas van Kervel
95773b9673 removed redundant newlines in import block 2015-05-12 15:20:53 +02:00
Bas van Kervel
b79dd188d9 replaced several path.* with filepath.* which is platform independent 2015-05-12 14:24:11 +02:00
Felix Lange
d4f0a67323 p2p: drop connections with no matching protocols 2015-05-08 16:09:55 +02:00
Felix Lange
9c0f36c46d p2p: use maxDialingConns instead of maxAcceptConns as dial limit 2015-05-08 16:09:55 +02:00
Felix Lange
914e57e49b p2p: fix disconnect at capacity
With the introduction of static/trusted nodes, the peer count
can go above MaxPeers. Update the capacity check to handle this.
While here, decouple the trusted nodes check from the handshake
by passing a function instead.
2015-05-08 16:09:54 +02:00
Péter Szilágyi
8735e5addd p2p: increase the handshake timeout in the tests 2015-05-07 15:30:56 +03:00
Péter Szilágyi
4d5a719f25 cmd, eth, p2p: introduce pending peer cli arg, add tests 2015-05-07 15:30:56 +03:00
Péter Szilágyi
af93217775 p2p: reduce the concurrent handshakes to 10/10 in/out 2015-05-07 15:22:09 +03:00
Péter Szilágyi
2060bc8bac p2p: fix dial throttling race condition 2015-05-07 15:22:08 +03:00
Péter Szilágyi
29fef349ef p2p: fix a dialing race in the throttler 2015-05-07 15:22:08 +03:00
Péter Szilágyi
3953bf0031 p2p: limit the outbound dialing too 2015-05-07 15:22:08 +03:00
Jeffrey Wilcke
a0cb1945ae Merge pull request #866 from fjl/p2p-last-minute
Last minute p2p fixes
2015-05-06 14:49:52 -07:00
Felix Lange
3e2a928caa p2p: stop dialing at half the maximum peer count 2015-05-06 23:44:51 +02:00
Felix Lange
6a2fec5309 p2p, whisper: use glog for peer-level logging 2015-05-06 23:19:14 +02:00