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2014-11-07Do not use third party services for IP detection.Gregory Maxwell
This is a simplified re-do of closed pull #3088. This patch eliminates the privacy and reliability problematic use of centralized web services for discovering the node's addresses for advertisement. The Bitcoin protocol already allows your peers to tell you what IP they think you have, but this data isn't trustworthy since they could lie. So the challenge is using it without creating a DOS vector. To accomplish this we adopt an approach similar to the one used by P2Pool: If we're announcing and don't have a better address discovered (e.g. via UPNP) or configured we just announce to each peer the address that peer told us. Since peers could already replace, forge, or drop our address messages this cannot create a new vulnerability... but if even one of our peers is giving us a good address we'll eventually make a useful advertisement. We also may randomly use the peer-provided address for the daily rebroadcast even if we otherwise have a seemingly routable address, just in case we've been misconfigured (e.g. by UPNP). To avoid privacy problems, we only do these things if discovery is enabled.
2014-10-22boost: split stream classes out of serialize.hCory Fields
serialization now has no dependencies.
2014-10-14Headers-first synchronizationPieter Wuille
Many changes: * Do not use 'getblocks', but 'getheaders', and use it to build a headers tree. * Blocks are fetched in parallel from all available outbound peers, using a limited moving window. When one peer stalls the movement of the window, it is disconnected. * No more orphan blocks. At all. We only ever request a block for which we have verified the headers, and store it to disk immediately. This means that a disk-fill attack would require PoW. * Require protocol version 31800 for every peer (released in december 2010). * No more syncnode (we sync from everyone we can, though limited to 1 during initial *headers* sync). * Introduce some extra named constants, comments and asserts.
2014-09-09Limit CNode::mapAskForWladimir J. van der Laan
Tighten resource constraints on CNode.
2014-08-28add missing header end commentsPhilip Kaufmann
- ensures a consistent usage in header files - also add a blank line after the copyright header where missing - also remove orphan new-lines at the end of some files
2014-08-26Split up util.cpp/hWladimir J. van der Laan
Split up util.cpp/h into: - string utilities (hex, base32, base64): no internal dependencies, no dependency on boost (apart from foreach) - money utilities (parsesmoney, formatmoney) - time utilities (gettime*, sleep, format date): - and the rest (logging, argument parsing, config file parsing) The latter is basically the environment and OS handling, and is stripped of all utility functions, so we may want to rename it to something else than util.cpp/h for clarity (Matt suggested osinterface). Breaks dependency of sha256.cpp on all the things pulled in by util.
2014-08-26move functions in main and net to implementation filesWladimir J. van der Laan
2014-08-18Merge pull request #4605Wladimir J. van der Laan
aa82795 Add detailed network info to getnetworkinfo RPC (Wladimir J. van der Laan) 075cf49 Add GetNetworkName function (Wladimir J. van der Laan) c91a947 Add IsReachable(net) function (Wladimir J. van der Laan) 60dc8e4 Allow -onlynet=onion to be used (Wladimir J. van der Laan)
2014-08-08small net cleanupPhilip Kaufmann
- add comment for disabling sigpipe - add closing comment in compat.h - remove redundant check in net.h
2014-07-30Add IsReachable(net) functionWladimir J. van der Laan
Allows other parts of the program to query for reachable status of a network. Similar to IsLimited(net).
2014-07-24Add missing FindNode prototype to net.hWladimir J. van der Laan
Also make the argument a const std::string & instead of pass-by-value.
2014-07-17Convert closesocket 'compat wrapper' to function in netbaseWladimir J. van der Laan
Simpler alternative to #4348. The current setup with closesocket() is strange. It poses as a compatibility wrapper but adds functionality. Rename it and make it a documented utility function in netbase. Code movement only, zero effect on the functionality.
2014-07-14Merge pull request #4400Wladimir J. van der Laan
4eedf4f make RandAddSeed() use OPENSSL_cleanse() (Philip Kaufmann) 6354935 move rand functions from util to new random.h/.cpp (Philip Kaufmann) 001a53d add GetRandBytes() as wrapper for RAND_bytes() (Philip Kaufmann)
2014-07-09Introduce whitelisted peers.Pieter Wuille
This adds a -whitelist option to specify subnet ranges from which peers that connect are whitelisted. In addition, there is a -whitebind option which works like -bind, except peers connecting to it are also whitelisted (allowing a separate listen port for trusted connections). Being whitelisted has two effects (for now): * They are immune to DoS disconnection/banning. * Transactions they broadcast (which are valid) are always relayed, even if they were already in the mempool. This means that a node can function as a gateway for a local network, and that rebroadcasts from the local network will work as expected. Whitelisting replaces the magic exemption localhost had for DoS disconnection (local addresses are still never banned, though), which implied hidden service connects (from a localhost Tor node) were incorrectly immune to DoS disconnection as well. This old behaviour is removed for that reason, but can be restored using -whitelist=127.0.0.1 or -whitelist=::1 can be specified. -whitebind is safer to use in case non-trusted localhost connections are expected (like hidden services).
2014-07-09move rand functions from util to new random.h/.cppPhilip Kaufmann
2014-07-07Merge pull request #4472Wladimir J. van der Laan
9f4da19 Use pong receive time rather than processing time (Pieter Wuille)
2014-07-06Use pong receive time rather than processing timePieter Wuille
2014-07-04Show nodeid instead of addresses (for anonymity) unless otherwise requested.R E Broadley
2014-06-26ensure clean and consistent "namespace" usagePhilip Kaufmann
- remove some missplaced ; - ensure end of a namespace is clearly visible - use same formatting when using namespace
2014-06-23Merge pull request #4388Wladimir J. van der Laan
3dc1464 add missing vhListenSocket.clear(); to CNetCleanup() (Philip Kaufmann) 2831a03 remove unused CNode::Cleanup() (Philip Kaufmann)
2014-06-22remove unused CNode::Cleanup()Philip Kaufmann
2014-06-22Code simplifications after CTransaction::GetHash() cachingPieter Wuille
2014-06-12Merge pull request #2784Wladimir J. van der Laan
f1920e8 Ping automatically every 2 minutes (unconditionally) (Pieter Wuille)
2014-06-11Merge pull request #4227Wladimir J. van der Laan
634bd61 convert an if into an else if in OpenNetworkConnection() (Philip Kaufmann) 5bd6c31 small cleanup of net (Philip Kaufmann)
2014-06-11small cleanup of netPhilip Kaufmann
- remove an unneded else in ConnectNode() - make 0 a double and change to 0.0 in ConnectNode() - rename strDest to pszDest in OpenNetworkConnection() - remove an unneded call to our REF() macro in BindListenPort() - small style cleanups and removal of unneeded new-lines
2014-06-11[Qt] allow setting listen via GUIPhilip Kaufmann
- add DEFAULT_LISTEN in net.h and use in the code (shared setting between core and GUI) Important: This makes it obvious, that we need to re-think the settings/options handling, as GUI settings are processed before any parameter-interaction (which is mostly important for network stuff) in AppInit2()!
2014-06-09Ping automatically every 2 minutes (unconditionally)Pieter Wuille
... instead of after 30 minutes of no sending, for latency measurement and keep-alive. Also, disconnect if no reply arrives within 20 minutes, instead of 90 of inactivity (for peers supporting the 'pong' message).
2014-06-09Merge pull request #3824Wladimir J. van der Laan
f0a83fc Use Params().NetworkID() instead of TestNet() from the payment protocol (jtimon) 2871889 net.h was using std namespace through chainparams.h included in protocol.h (jtimon) c8c52de Replace virtual methods with static attributes, chainparams.h depends on protocol.h instead of the other way around (jtimon) a3d946e Get rid of TestNet() (jtimon) 6fc0fa6 Add RPCisTestNet chain parameter (jtimon) cfeb823 Add RequireStandard chain parameter (jtimon) 21913a9 Add AllowMinDifficultyBlocks chain parameter (jtimon) d754f34 Move majority constants to chainparams (jtimon) 8d26721 Get rid of RegTest() (jtimon) cb9bd83 Add DefaultCheckMemPool chain parameter (jtimon) 2595b9a Add DefaultMinerThreads chain parameter (jtimon) bfa9a1a Add MineBlocksOnDemand chain parameter (jtimon) 1712adb Add MiningRequiresPeers chain parameter (jtimon)
2014-06-04Merge pull request #4247 from Diapolo/listenJeff Garzik
rename fNoListen to fListen and move to net
2014-06-04net.h was using std namespace through chainparams.h included in protocol.hjtimon
2014-05-30Limit number of known addresses per peerPieter Wuille
2014-05-29rename fNoListen to fListen and move to netPhilip Kaufmann
- better code readability and it belongs to net - this is a prerequisite for a pull to add -listen to the GUI
2014-05-29Merge pull request #4132Wladimir J. van der Laan
d4e1c61 add DEFAULT_UPNP constant in net (Philip Kaufmann)
2014-05-25Merge pull request #4206Wladimir J. van der Laan
79d06dc Remove redundant c_str (R E Broadley)
2014-05-22Remove redundant c_strR E Broadley
2014-05-20add DEFAULT_UPNP constant in netPhilip Kaufmann
- as this is a shared Core/GUI setting, this makes it easier to keep them in sync (also no new includes are needed)
2014-05-10Fix addnode "onetry": Connect with OpenNetworkConnectionCozz Lovan
2014-05-06rpc: add `getblockchaininfo` and `getnetworkinfo`Wladimir J. van der Laan
Adds two new info query commands that take over information from hodge-podge `getinfo`. Also some new information is added: - `getblockchaininfo` - `chain`: (string) current chain (main, testnet3, regtest) - `verificationprogress: (numeric) estimated verification progress - `chainwork` - `getnetworkinfo` - `localaddresses`: (array) local addresses, from mapLocalHost (fixes #1734)
2014-03-10Merge pull request #3514Wladimir J. van der Laan
f59d8f0 Per-peer block download tracking and stalled download detection. (Pieter Wuille)
2014-02-24Get rid of C99 PRI?64 usage in source filesWladimir J. van der Laan
Amend to d5f1e72. It turns out that BerkelyDB was including inttypes.h indirectly, so we cannot fix this with just macros. Trivial commit: apply the following script to all .cpp and .h files: # Middle sed -i 's/"PRIx64"/x/g' "$1" sed -i 's/"PRIu64"/u/g' "$1" sed -i 's/"PRId64"/d/g' "$1" # Initial sed -i 's/PRIx64"/"x/g' "$1" sed -i 's/PRIu64"/"u/g' "$1" sed -i 's/PRId64"/"d/g' "$1" # Trailing sed -i 's/"PRIx64/x"/g' "$1" sed -i 's/"PRIu64/u"/g' "$1" sed -i 's/"PRId64/d"/g' "$1" After this commit, `git grep` for PRI.64 should turn up nothing except the defines in util.h.
2014-02-22Don't use PRIx64 formatting derives from inttypes.hWladimir J. van der Laan
As the tinyformat-based formatting system (introduced in b77dfdc) is type-safe, no special format characters are needed to specify sizes. Tinyformat can support (ignore) the C99 prefixes such as "ll" but chokes on MSVC's inttypes.h defines prefixes such as "I64X". So don't include inttypes.h and define our own for compatibility. (an alternative would be to sweep the entire codebase using sed -i to get rid of the size specifiers but this has less diff impact)
2014-02-09Copyright header updates s/2013/2014 on files whose last git commit was done ↵gubatron
in 2014. contrib/devtools/fix-copyright-headers.py script to be able to perform this maintenance task with ease during the rest of the year, every year. Modifications to contrib/devtools/README.md to document what fix-copyright-headers.py does.
2014-02-08Per-peer block download tracking and stalled download detection.Pieter Wuille
Keep track of which block is being requested (and to be requested) from each peer, and limit the number of blocks in-flight per peer. In addition, detect stalled downloads, and disconnect if they persist for too long. This means blocks are never requested twice, and should eliminate duplicate downloads during synchronization.
2014-01-11small headers ordering cleanupPhilip Kaufmann
- keep headers in alphabetical order - fix Makefile.am (2 files in 1 line - leftover) - remove some spaces etc.
2013-12-08Add main-specific node statePieter Wuille
2013-12-04Move CAddrDB frrom db to netWladimir J. van der Laan
This was a leftover from the times in which peers.dat depended in BDB. Other functions in db.cpp still depend on BerkelyDB, to be able to compile without BDB this (small) functionality needs to be moved to another file.
2013-11-26Store and use a sanitized subVerMike Hearn
2013-11-11misc small changes to polish after include cleanupPhilip Kaufmann
2013-11-10Move CCoins-related logic to coins.{cpp.h}Pieter Wuille
2013-11-10Cleanup code using forward declarations.Brandon Dahler
Use misc methods of avoiding unnecesary header includes. Replace int typedefs with int##_t from stdint.h. Replace PRI64[xdu] with PRI[xdu]64 from inttypes.h. Normalize QT_VERSION ifs where possible. Resolve some indirect dependencies as direct ones. Remove extern declarations from .cpp files.