diff options
| -rw-r--r-- | contrib/seeds/README.md | 4 | ||||
| -rw-r--r-- | src/chainparams.cpp | 26 | ||||
| -rw-r--r-- | src/chainparams.h | 11 | ||||
| -rw-r--r-- | src/net.cpp | 27 | ||||
| -rw-r--r-- | src/protocol.h | 10 |
5 files changed, 39 insertions, 39 deletions
diff --git a/contrib/seeds/README.md b/contrib/seeds/README.md index 139c03181f..6dc277f298 100644 --- a/contrib/seeds/README.md +++ b/contrib/seeds/README.md @@ -4,7 +4,9 @@ Utility to generate the seeds.txt list that is compiled into the client (see [src/chainparamsseeds.h](/src/chainparamsseeds.h) and other utilities in [contrib/seeds](/contrib/seeds)). Be sure to update `PATTERN_AGENT` in `makeseeds.py` to include the current version, -and remove old versions as necessary. +and remove old versions as necessary (at a minimum when GetDesireableServiceFlags +changes its default return value, as those are the services which seeds are added +to addrman with). The seeds compiled into the release are created from sipa's DNS seed data, like this: diff --git a/src/chainparams.cpp b/src/chainparams.cpp index 97a6c346ab..39757baf9e 100644 --- a/src/chainparams.cpp +++ b/src/chainparams.cpp @@ -124,13 +124,17 @@ public: assert(consensus.hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")); assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b")); - // Note that of those with the service bits flag, most only support a subset of possible options - vSeeds.emplace_back("seed.bitcoin.sipa.be", true); // Pieter Wuille, only supports x1, x5, x9, and xd - vSeeds.emplace_back("dnsseed.bluematt.me", true); // Matt Corallo, only supports x9 - vSeeds.emplace_back("dnsseed.bitcoin.dashjr.org", false); // Luke Dashjr - vSeeds.emplace_back("seed.bitcoinstats.com", true); // Christian Decker, supports x1 - xf - vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch", true); // Jonas Schnelli, only supports x1, x5, x9, and xd - vSeeds.emplace_back("seed.btc.petertodd.org", true); // Peter Todd, only supports x1, x5, x9, and xd + // Note that of those which support the service bits prefix, most only support a subset of + // possible options. + // This is fine at runtime as we'll fall back to using them as a oneshot if they dont support the + // service bits we want, but we should get them updated to support all service bits wanted by any + // release ASAP to avoid it where possible. + vSeeds.emplace_back("seed.bitcoin.sipa.be"); // Pieter Wuille, only supports x1, x5, x9, and xd + vSeeds.emplace_back("dnsseed.bluematt.me"); // Matt Corallo, only supports x9 + vSeeds.emplace_back("dnsseed.bitcoin.dashjr.org"); // Luke Dashjr + vSeeds.emplace_back("seed.bitcoinstats.com"); // Christian Decker, supports x1 - xf + vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch"); // Jonas Schnelli, only supports x1, x5, x9, and xd + vSeeds.emplace_back("seed.btc.petertodd.org"); // Peter Todd, only supports x1, x5, x9, and xd base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0); base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5); @@ -229,10 +233,10 @@ public: vFixedSeeds.clear(); vSeeds.clear(); // nodes with support for servicebits filtering should be at the top - vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch", true); - vSeeds.emplace_back("seed.tbtc.petertodd.org", true); - vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl", true); - vSeeds.emplace_back("testnet-seed.bluematt.me", false); + vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch"); + vSeeds.emplace_back("seed.tbtc.petertodd.org"); + vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl"); + vSeeds.emplace_back("testnet-seed.bluematt.me"); // Just a static list of stable node(s), only supports x9 base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111); base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196); diff --git a/src/chainparams.h b/src/chainparams.h index ecfe1a0ac3..d478da9891 100644 --- a/src/chainparams.h +++ b/src/chainparams.h @@ -14,12 +14,6 @@ #include <memory> #include <vector> -struct CDNSSeedData { - std::string host; - bool supportsServiceBitsFiltering; - CDNSSeedData(const std::string &strHost, bool supportsServiceBitsFilteringIn) : host(strHost), supportsServiceBitsFiltering(supportsServiceBitsFilteringIn) {} -}; - struct SeedSpec6 { uint8_t addr[16]; uint16_t port; @@ -71,7 +65,8 @@ public: bool MineBlocksOnDemand() const { return fMineBlocksOnDemand; } /** Return the BIP70 network string (main, test or regtest) */ std::string NetworkIDString() const { return strNetworkID; } - const std::vector<CDNSSeedData>& DNSSeeds() const { return vSeeds; } + /** Return the list of hostnames to look up for DNS seeds */ + const std::vector<std::string>& DNSSeeds() const { return vSeeds; } const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; } const std::string& Bech32HRP() const { return bech32_hrp; } const std::vector<SeedSpec6>& FixedSeeds() const { return vFixedSeeds; } @@ -85,7 +80,7 @@ protected: CMessageHeader::MessageStartChars pchMessageStart; int nDefaultPort; uint64_t nPruneAfterHeight; - std::vector<CDNSSeedData> vSeeds; + std::vector<std::string> vSeeds; std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES]; std::string bech32_hrp; std::string strNetworkID; diff --git a/src/net.cpp b/src/net.cpp index 682f47bff2..8111390749 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -136,7 +136,7 @@ static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn for (const auto& seed_in : vSeedsIn) { struct in6_addr ip; memcpy(&ip, seed_in.addr, sizeof(ip)); - CAddress addr(CService(ip, seed_in.port), NODE_NETWORK); + CAddress addr(CService(ip, seed_in.port), GetDesirableServiceFlags(NODE_NONE)); addr.nTime = GetTime() - GetRand(nOneWeek) - nOneWeek; vSeedsOut.push_back(addr); } @@ -1577,19 +1577,6 @@ void MapPort(bool) -static std::string GetDNSHost(const CDNSSeedData& data, ServiceFlags* requiredServiceBits) -{ - //use default host for non-filter-capable seeds or if we use the default service bits (NODE_NETWORK) - if (!data.supportsServiceBitsFiltering || *requiredServiceBits == NODE_NETWORK) { - *requiredServiceBits = NODE_NETWORK; - return data.host; - } - - // See chainparams.cpp, most dnsseeds only support one or two possible servicebits hostnames - return strprintf("x%x.%s", *requiredServiceBits, data.host); -} - - void CConnman::ThreadDNSAddressSeed() { // goal: only query DNS seeds if address need is acute @@ -1612,22 +1599,22 @@ void CConnman::ThreadDNSAddressSeed() } } - const std::vector<CDNSSeedData> &vSeeds = Params().DNSSeeds(); + const std::vector<std::string> &vSeeds = Params().DNSSeeds(); int found = 0; LogPrintf("Loading addresses from DNS seeds (could take a while)\n"); - for (const CDNSSeedData &seed : vSeeds) { + for (const std::string &seed : vSeeds) { if (interruptNet) { return; } if (HaveNameProxy()) { - AddOneShot(seed.host); + AddOneShot(seed); } else { std::vector<CNetAddr> vIPs; std::vector<CAddress> vAdd; ServiceFlags requiredServiceBits = GetDesirableServiceFlags(NODE_NONE); - std::string host = GetDNSHost(seed, &requiredServiceBits); + std::string host = strprintf("x%x.%s", requiredServiceBits, seed); CNetAddr resolveSource; if (!resolveSource.SetInternal(host)) { continue; @@ -1643,6 +1630,10 @@ void CConnman::ThreadDNSAddressSeed() found++; } addrman.Add(vAdd, resolveSource); + } else { + // We now avoid directly using results from DNS Seeds which do not support service bit filtering, + // instead using them as a oneshot to get nodes with our desired service bits. + AddOneShot(seed); } } } diff --git a/src/protocol.h b/src/protocol.h index 452b5b28ce..43d8ac067a 100644 --- a/src/protocol.h +++ b/src/protocol.h @@ -291,7 +291,15 @@ enum ServiceFlags : uint64_t { * unless they set NODE_NETWORK_LIMITED and we are out of IBD, in which * case NODE_NETWORK_LIMITED suffices). * - * Thus, generally, avoid calling with peerServices == NODE_NONE. + * Thus, generally, avoid calling with peerServices == NODE_NONE, unless + * state-specific flags must absolutely be avoided. When called with + * peerServices == NODE_NONE, the returned desirable service flags are + * guaranteed to not change dependant on state - ie they are suitable for + * use when describing peers which we know to be desirable, but for which + * we do not have a confirmed set of service flags. + * + * If the NODE_NONE return value is changed, contrib/seeds/makeseeds.py + * should be updated appropriately to filter for the same nodes. */ static ServiceFlags GetDesirableServiceFlags(ServiceFlags services) { return ServiceFlags(NODE_NETWORK | NODE_WITNESS); |