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net: Deserialize hardcoded seeds from BIP155 blob

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Switch from IPv6 slot-based format to more compact and flexible BIP155
format.
This commit is contained in:
W. J. van der Laan 2021-03-31 13:29:24 +02:00
parent 9b29d5df7f
commit b2ee8b207d
4 changed files with 1211 additions and 1192 deletions
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4
src/chainparams.cpp
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@ -134,7 +134,7 @@ public:
bech32_hrp = "bc";
vFixedSeeds = std::vector<SeedSpec6>(std::begin(pnSeed6_main), std::end(pnSeed6_main));
vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_main), std::end(chainparams_seed_main));
fDefaultConsistencyChecks = false;
fRequireStandard = true;
@ -239,7 +239,7 @@ public:
bech32_hrp = "tb";
vFixedSeeds = std::vector<SeedSpec6>(std::begin(pnSeed6_test), std::end(pnSeed6_test));
vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_test), std::end(chainparams_seed_test));
fDefaultConsistencyChecks = false;
fRequireStandard = false;

9
src/chainparams.h
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@ -14,11 +14,6 @@
#include <memory>
#include <vector>
struct SeedSpec6 {
uint8_t addr[16];
uint16_t port;
};
typedef std::map<int, uint256> MapCheckpoints;
struct CCheckpointData {
@ -108,7 +103,7 @@ public:
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; }
const std::vector<uint8_t>& FixedSeeds() const { return vFixedSeeds; }
const CCheckpointData& Checkpoints() const { return checkpointData; }
//! Get allowed assumeutxo configuration.
@ -130,7 +125,7 @@ protected:
std::string bech32_hrp;
std::string strNetworkID;
CBlock genesis;
std::vector<SeedSpec6> vFixedSeeds;
std::vector<uint8_t> vFixedSeeds;
bool fDefaultConsistencyChecks;
bool fRequireStandard;
bool m_is_test_chain;

2373
src/chainparamsseeds.h
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File diff suppressed because it is too large Load Diff

17
src/net.cpp
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@ -141,8 +141,8 @@ bool GetLocal(CService& addr, const CNetAddr *paddrPeer)
return nBestScore >= 0;
}
//! Convert the pnSeed6 array into usable address objects.
static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn)
//! Convert the serialized seeds into usable address objects.
static std::vector<CAddress> ConvertSeeds(const std::vector<uint8_t> &vSeedsIn)
{
// It'll only connect to one or two seed nodes because once it connects,
// it'll get a pile of addresses with newer timestamps.
@ -150,13 +150,14 @@ static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn
// weeks ago.
const int64_t nOneWeek = 7*24*60*60;
std::vector<CAddress> vSeedsOut;
vSeedsOut.reserve(vSeedsIn.size());
FastRandomContext rng;
for (const auto& seed_in : vSeedsIn) {
struct in6_addr ip;
memcpy(&ip, seed_in.addr, sizeof(ip));
CAddress addr(CService(ip, seed_in.port), GetDesirableServiceFlags(NODE_NONE));
CDataStream s(vSeedsIn, SER_NETWORK, PROTOCOL_VERSION | ADDRV2_FORMAT);
while (!s.eof()) {
CService endpoint;
s >> endpoint;
CAddress addr{endpoint, GetDesirableServiceFlags(NODE_NONE)};
addr.nTime = GetTime() - rng.randrange(nOneWeek) - nOneWeek;
LogPrint(BCLog::NET, "Added hardcoded seed: %s\n", addr.ToString());
vSeedsOut.push_back(addr);
}
return vSeedsOut;
@ -1840,7 +1841,7 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect)
if (add_fixed_seeds_now) {
CNetAddr local;
local.SetInternal("fixedseeds");
addrman.Add(convertSeed6(Params().FixedSeeds()), local);
addrman.Add(ConvertSeeds(Params().FixedSeeds()), local);
add_fixed_seeds = false;
}
}