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diff --git a/src/seeder/main.cpp b/src/seeder/main.cpp
index bc5ac8efb..ab1460f20 100644
--- a/src/seeder/main.cpp
+++ b/src/seeder/main.cpp
@@ -1,600 +1,605 @@
// Copyright (c) 2017-2020 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <chainparams.h>
#include <clientversion.h>
#include <dnsseeds.h>
#include <fs.h>
#include <logging.h>
#include <protocol.h>
#include <seeder/bitcoin.h>
#include <seeder/db.h>
#include <seeder/dns.h>
#include <streams.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <util/time.h>
#include <util/translation.h>
#include <algorithm>
#include <atomic>
#include <cinttypes>
#include <csignal>
#include <cstdlib>
#include <functional>
#include <pthread.h>
const std::function<std::string(const char *)> G_TRANSLATION_FUN = nullptr;
static const int CONTINUE_EXECUTION = -1;
static const int DEFAULT_NUM_THREADS = 96;
static const int DEFAULT_PORT = 53;
static const int DEFAULT_NUM_DNS_THREADS = 4;
static const bool DEFAULT_WIPE_BAN = false;
static const bool DEFAULT_WIPE_IGNORE = false;
static const std::string DEFAULT_EMAIL = "";
static const std::string DEFAULT_NAMESERVER = "";
static const std::string DEFAULT_HOST = "";
static const std::string DEFAULT_TOR_PROXY = "";
static const std::string DEFAULT_LISTEN_ADDRESS = "::";
static const std::string DEFAULT_IPV4_PROXY = "";
static const std::string DEFAULT_IPV6_PROXY = "";
class CDnsSeedOpts {
public:
int nThreads;
int nPort;
int nDnsThreads;
bool fWipeBan;
bool fWipeIgnore;
std::string mbox;
std::string ns;
std::string host;
std::string tor;
std::string ip_addr;
std::string ipv4_proxy;
std::string ipv6_proxy;
std::set<uint64_t> filter_whitelist;
CDnsSeedOpts()
: nThreads(DEFAULT_NUM_THREADS), nPort(DEFAULT_PORT),
nDnsThreads(DEFAULT_NUM_DNS_THREADS), fWipeBan(DEFAULT_WIPE_BAN),
fWipeIgnore(DEFAULT_WIPE_IGNORE), mbox(DEFAULT_EMAIL),
ns(DEFAULT_NAMESERVER), host(DEFAULT_HOST), tor(DEFAULT_TOR_PROXY),
ip_addr(DEFAULT_LISTEN_ADDRESS), ipv4_proxy(DEFAULT_IPV4_PROXY),
ipv6_proxy(DEFAULT_IPV6_PROXY) {}
int ParseCommandLine(int argc, char **argv) {
SetupSeederArgs(gArgs);
std::string error;
if (!gArgs.ParseParameters(argc, argv, error)) {
tfm::format(std::cerr, "Error parsing command line arguments: %s\n",
error);
return EXIT_FAILURE;
}
if (HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
std::string strUsage =
PACKAGE_NAME " Seeder " + FormatFullVersion() + "\n";
if (HelpRequested(gArgs)) {
strUsage +=
"\nUsage: bitcoin-seeder -host=<host> -ns=<ns> "
"[-mbox=<mbox>] [-threads=<threads>] [-port=<port>]\n\n" +
gArgs.GetHelpMessage();
}
tfm::format(std::cout, "%s", strUsage);
return EXIT_SUCCESS;
}
nThreads = gArgs.GetArg("-threads", DEFAULT_NUM_THREADS);
nPort = gArgs.GetArg("-port", DEFAULT_PORT);
nDnsThreads = gArgs.GetArg("-dnsthreads", DEFAULT_NUM_DNS_THREADS);
fWipeBan = gArgs.GetBoolArg("-wipeban", DEFAULT_WIPE_BAN);
fWipeIgnore = gArgs.GetBoolArg("-wipeignore", DEFAULT_WIPE_IGNORE);
mbox = gArgs.GetArg("-mbox", DEFAULT_EMAIL);
ns = gArgs.GetArg("-ns", DEFAULT_NAMESERVER);
host = gArgs.GetArg("-host", DEFAULT_HOST);
tor = gArgs.GetArg("-onion", DEFAULT_TOR_PROXY);
ip_addr = gArgs.GetArg("-address", DEFAULT_LISTEN_ADDRESS);
ipv4_proxy = gArgs.GetArg("-proxyipv4", DEFAULT_IPV4_PROXY);
ipv6_proxy = gArgs.GetArg("-proxyipv6", DEFAULT_IPV6_PROXY);
SelectParams(gArgs.GetChainName());
// Both IPv4 and IPv6 addresses are valid, but the listening address is
// treated as IPv6 internally
if (ip_addr.find(':') == std::string::npos) {
ip_addr.insert(0, "::FFFF:");
}
if (gArgs.IsArgSet("-filter")) {
// Parse whitelist additions
std::string flagString = gArgs.GetArg("-filter", "");
size_t flagstartpos = 0;
while (flagstartpos < flagString.size()) {
size_t flagendpos = flagString.find_first_of(',', flagstartpos);
uint64_t flag = atoi64(flagString.substr(
flagstartpos, (flagendpos - flagstartpos)));
filter_whitelist.insert(flag);
if (flagendpos == std::string::npos) {
break;
}
flagstartpos = flagendpos + 1;
}
}
if (filter_whitelist.empty()) {
filter_whitelist.insert(NODE_NETWORK);
filter_whitelist.insert(NODE_NETWORK | NODE_BLOOM);
}
return CONTINUE_EXECUTION;
}
private:
void SetupSeederArgs(ArgsManager &argsman) {
SetupHelpOptions(argsman);
argsman.AddArg("-help-debug",
"Show all debugging options (usage: --help -help-debug)",
ArgsManager::ALLOW_ANY, OptionsCategory::DEBUG_TEST);
SetupChainParamsBaseOptions(argsman);
argsman.AddArg("-version", "Print version and exit",
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-host=<host>", "Hostname of the DNS seed",
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-ns=<ns>", "Hostname of the nameserver",
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-mbox=<mbox>", "E-Mail address reported in SOA records",
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
- argsman.AddArg("-threads=<threads>",
- "Number of crawlers to run in parallel (default 96)",
- ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
+ argsman.AddArg(
+ "-threads=<threads>",
+ strprintf("Number of crawlers to run in parallel (default: %d)",
+ DEFAULT_NUM_THREADS),
+ ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-dnsthreads=<threads>",
- "Number of DNS server threads (default 4)",
+ strprintf("Number of DNS server threads (default: %d)",
+ DEFAULT_NUM_DNS_THREADS),
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-address=<address>",
strprintf("Address to listen on (default: '%s')",
DEFAULT_LISTEN_ADDRESS),
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
- argsman.AddArg("-port=<port>", "UDP port to listen on (default 53)",
- ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
+ argsman.AddArg(
+ "-port=<port>",
+ strprintf("UDP port to listen on (default: %d)", DEFAULT_PORT),
+ ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-onion=<ip:port>", "Tor proxy IP/Port",
ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-overridednsseed",
"If set, only use the specified DNS seed when "
"querying for peer addresses via DNS lookup.",
ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-proxyipv4=<ip:port>", "IPV4 SOCKS5 proxy IP/Port",
ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-proxyipv6=<ip:port>", "IPV6 SOCKS5 proxy IP/Port",
ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-filter=<f1,f2,...>",
"Allow these flag combinations as filters",
ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
argsman.AddArg("-wipeban", "Wipe list of banned nodes",
ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-wipeignore", "Wipe list of ignored nodes",
ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
}
};
extern "C" {
#include <seeder/dns.h>
}
CAddrDb db;
extern "C" void *ThreadCrawler(void *data) {
int *nThreads = (int *)data;
do {
std::vector<CServiceResult> ips;
int wait = 5;
db.GetMany(ips, 16, wait);
int64_t now = GetTime();
if (ips.empty()) {
wait *= 1000;
wait += rand() % (500 * *nThreads);
Sleep(wait);
continue;
}
std::vector<CAddress> addr;
for (size_t i = 0; i < ips.size(); i++) {
CServiceResult &res = ips[i];
res.nBanTime = 0;
res.nClientV = 0;
res.nHeight = 0;
res.strClientV = "";
bool getaddr = res.ourLastSuccess + 86400 < now;
try {
CSeederNode node(res.service, getaddr ? &addr : nullptr);
bool ret = node.Run();
if (!ret) {
res.nBanTime = node.GetBan();
} else {
res.nBanTime = 0;
}
res.nClientV = node.GetClientVersion();
res.strClientV = node.GetClientSubVersion();
res.nHeight = node.GetStartingHeight();
// tfm::format(std::cout, "%s: %s!!!\n", cip.ToString(),
// ret ? "GOOD" : "BAD");
res.fGood = ret;
} catch (std::ios_base::failure &e) {
res.nBanTime = 0;
res.fGood = false;
}
}
db.ResultMany(ips);
db.Add(addr);
} while (1);
return nullptr;
}
extern "C" uint32_t GetIPList(void *thread, char *requestedHostname,
addr_t *addr, uint32_t max, uint32_t ipv4,
uint32_t ipv6);
class CDnsThread {
public:
struct FlagSpecificData {
int nIPv4, nIPv6;
std::vector<addr_t> cache;
time_t cacheTime;
unsigned int cacheHits;
FlagSpecificData() : nIPv4(0), nIPv6(0), cacheTime(0), cacheHits(0) {}
};
dns_opt_t dns_opt; // must be first
const int id;
std::map<uint64_t, FlagSpecificData> perflag;
std::atomic<uint64_t> dbQueries;
std::set<uint64_t> filterWhitelist;
void cacheHit(uint64_t requestedFlags, bool force = false) {
static bool nets[NET_MAX] = {};
if (!nets[NET_IPV4]) {
nets[NET_IPV4] = true;
nets[NET_IPV6] = true;
}
int64_t now = GetTime();
FlagSpecificData &thisflag = perflag[requestedFlags];
thisflag.cacheHits++;
if (force ||
thisflag.cacheHits * 400 >
(thisflag.cache.size() * thisflag.cache.size()) ||
(thisflag.cacheHits * thisflag.cacheHits * 20 >
thisflag.cache.size() &&
(now - thisflag.cacheTime > 5))) {
std::set<CNetAddr> ips;
db.GetIPs(ips, requestedFlags, 1000, nets);
dbQueries++;
thisflag.cache.clear();
thisflag.nIPv4 = 0;
thisflag.nIPv6 = 0;
thisflag.cache.reserve(ips.size());
for (auto &ip : ips) {
struct in_addr addr;
struct in6_addr addr6;
if (ip.GetInAddr(&addr)) {
addr_t a;
a.v = 4;
memcpy(&a.data.v4, &addr, 4);
thisflag.cache.push_back(a);
thisflag.nIPv4++;
} else if (ip.GetIn6Addr(&addr6)) {
addr_t a;
a.v = 6;
memcpy(&a.data.v6, &addr6, 16);
thisflag.cache.push_back(a);
thisflag.nIPv6++;
}
}
thisflag.cacheHits = 0;
thisflag.cacheTime = now;
}
}
CDnsThread(CDnsSeedOpts *opts, int idIn) : id(idIn) {
dns_opt.host = opts->host.c_str();
dns_opt.ns = opts->ns.c_str();
dns_opt.mbox = opts->mbox.c_str();
dns_opt.datattl = 3600;
dns_opt.nsttl = 40000;
dns_opt.cb = GetIPList;
dns_opt.addr = opts->ip_addr.c_str();
dns_opt.port = opts->nPort;
dns_opt.nRequests = 0;
dbQueries = 0;
perflag.clear();
filterWhitelist = opts->filter_whitelist;
}
void run() { dnsserver(&dns_opt); }
};
extern "C" uint32_t GetIPList(void *data, char *requestedHostname, addr_t *addr,
uint32_t max, uint32_t ipv4, uint32_t ipv6) {
CDnsThread *thread = (CDnsThread *)data;
uint64_t requestedFlags = 0;
int hostlen = strlen(requestedHostname);
if (hostlen > 1 && requestedHostname[0] == 'x' &&
requestedHostname[1] != '0') {
char *pEnd;
uint64_t flags = (uint64_t)strtoull(requestedHostname + 1, &pEnd, 16);
if (*pEnd == '.' && pEnd <= requestedHostname + 17 &&
std::find(thread->filterWhitelist.begin(),
thread->filterWhitelist.end(),
flags) != thread->filterWhitelist.end()) {
requestedFlags = flags;
} else {
return 0;
}
} else if (strcasecmp(requestedHostname, thread->dns_opt.host)) {
return 0;
}
thread->cacheHit(requestedFlags);
auto &thisflag = thread->perflag[requestedFlags];
uint32_t size = thisflag.cache.size();
uint32_t maxmax = (ipv4 ? thisflag.nIPv4 : 0) + (ipv6 ? thisflag.nIPv6 : 0);
if (max > size) {
max = size;
}
if (max > maxmax) {
max = maxmax;
}
uint32_t i = 0;
while (i < max) {
uint32_t j = i + (rand() % (size - i));
do {
bool ok = (ipv4 && thisflag.cache[j].v == 4) ||
(ipv6 && thisflag.cache[j].v == 6);
if (ok) {
break;
}
j++;
if (j == size) {
j = i;
}
} while (1);
addr[i] = thisflag.cache[j];
thisflag.cache[j] = thisflag.cache[i];
thisflag.cache[i] = addr[i];
i++;
}
return max;
}
std::vector<CDnsThread *> dnsThread;
extern "C" void *ThreadDNS(void *arg) {
CDnsThread *thread = (CDnsThread *)arg;
thread->run();
return nullptr;
}
int StatCompare(const CAddrReport &a, const CAddrReport &b) {
if (a.uptime[4] == b.uptime[4]) {
if (a.uptime[3] == b.uptime[3]) {
return a.clientVersion > b.clientVersion;
} else {
return a.uptime[3] > b.uptime[3];
}
} else {
return a.uptime[4] > b.uptime[4];
}
}
extern "C" void *ThreadDumper(void *) {
int count = 0;
do {
// First 100s, than 200s, 400s, 800s, 1600s, and then 3200s forever
Sleep(100000 << count);
if (count < 5) {
count++;
}
{
std::vector<CAddrReport> v = db.GetAll();
sort(v.begin(), v.end(), StatCompare);
FILE *f = fsbridge::fopen("dnsseed.dat.new", "w+");
if (f) {
{
CAutoFile cf(f, SER_DISK, CLIENT_VERSION);
cf << db;
}
rename("dnsseed.dat.new", "dnsseed.dat");
}
fsbridge::ofstream d{"dnsseed.dump"};
tfm::format(
d, "# address good "
"lastSuccess %%(2h) %%(8h) %%(1d) %%(7d) "
"%%(30d) blocks svcs version\n");
double stat[5] = {0, 0, 0, 0, 0};
for (CAddrReport rep : v) {
tfm::format(
d,
"%-47s %4d %11" PRId64
" %6.2f%% %6.2f%% %6.2f%% %6.2f%% %6.2f%% %6i %08" PRIx64
" %5i \"%s\"\n",
rep.ip.ToString(), (int)rep.fGood, rep.lastSuccess,
100.0 * rep.uptime[0], 100.0 * rep.uptime[1],
100.0 * rep.uptime[2], 100.0 * rep.uptime[3],
100.0 * rep.uptime[4], rep.blocks, rep.services,
rep.clientVersion, rep.clientSubVersion);
stat[0] += rep.uptime[0];
stat[1] += rep.uptime[1];
stat[2] += rep.uptime[2];
stat[3] += rep.uptime[3];
stat[4] += rep.uptime[4];
}
fsbridge::ofstream ff{"dnsstats.log", std::ios_base::app};
tfm::format(ff, "%llu %g %g %g %g %g\n", GetTime(), stat[0],
stat[1], stat[2], stat[3], stat[4]);
}
} while (1);
return nullptr;
}
extern "C" void *ThreadStats(void *) {
bool first = true;
do {
char c[256];
time_t tim = time(nullptr);
struct tm *tmp = localtime(&tim);
strftime(c, 256, "[%y-%m-%d %H:%M:%S]", tmp);
CAddrDbStats stats;
db.GetStats(stats);
if (first) {
first = false;
tfm::format(std::cout, "\n\n\n\x1b[3A");
} else {
tfm::format(std::cout, "\x1b[2K\x1b[u");
}
tfm::format(std::cout, "\x1b[s");
uint64_t requests = 0;
uint64_t queries = 0;
for (unsigned int i = 0; i < dnsThread.size(); i++) {
requests += dnsThread[i]->dns_opt.nRequests;
queries += dnsThread[i]->dbQueries;
}
tfm::format(
std::cout,
"%s %i/%i available (%i tried in %is, %i new, %i active), %i "
"banned; %llu DNS requests, %llu db queries\n",
c, stats.nGood, stats.nAvail, stats.nTracked, stats.nAge,
stats.nNew, stats.nAvail - stats.nTracked - stats.nNew,
stats.nBanned, (unsigned long long)requests,
(unsigned long long)queries);
Sleep(1000);
} while (1);
return nullptr;
}
const static unsigned int MAX_HOSTS_PER_SEED = 128;
extern "C" void *ThreadSeeder(void *) {
do {
for (const std::string &seed : GetRandomizedDNSSeeds(Params())) {
std::vector<CNetAddr> ips;
LookupHost(seed.c_str(), ips, MAX_HOSTS_PER_SEED, true);
for (auto &ip : ips) {
db.Add(CAddress(CService(ip, GetDefaultPort()), ServiceFlags()),
true);
}
}
Sleep(1800000);
} while (1);
return nullptr;
}
int main(int argc, char **argv) {
// The logger dump everything on the console by default.
LogInstance().m_print_to_console = true;
signal(SIGPIPE, SIG_IGN);
setbuf(stdout, nullptr);
CDnsSeedOpts opts;
int parseResults = opts.ParseCommandLine(argc, argv);
if (parseResults != CONTINUE_EXECUTION) {
return parseResults;
}
tfm::format(std::cout, "Supporting whitelisted filters: ");
for (std::set<uint64_t>::const_iterator it = opts.filter_whitelist.begin();
it != opts.filter_whitelist.end(); it++) {
if (it != opts.filter_whitelist.begin()) {
tfm::format(std::cout, ",");
}
tfm::format(std::cout, "0x%lx", (unsigned long)*it);
}
tfm::format(std::cout, "\n");
if (!opts.tor.empty()) {
CService service(LookupNumeric(opts.tor.c_str(), 9050));
if (service.IsValid()) {
tfm::format(std::cout, "Using Tor proxy at %s\n",
service.ToStringIPPort());
SetProxy(NET_ONION, proxyType(service));
}
}
if (!opts.ipv4_proxy.empty()) {
CService service(LookupNumeric(opts.ipv4_proxy.c_str(), 9050));
if (service.IsValid()) {
tfm::format(std::cout, "Using IPv4 proxy at %s\n",
service.ToStringIPPort());
SetProxy(NET_IPV4, proxyType(service));
}
}
if (!opts.ipv6_proxy.empty()) {
CService service(LookupNumeric(opts.ipv6_proxy.c_str(), 9050));
if (service.IsValid()) {
tfm::format(std::cout, "Using IPv6 proxy at %s\n",
service.ToStringIPPort());
SetProxy(NET_IPV6, proxyType(service));
}
}
bool fDNS = true;
tfm::format(std::cout, "Using %s.\n", gArgs.GetChainName());
if (opts.ns.empty()) {
tfm::format(std::cout, "No nameserver set. Not starting DNS server.\n");
fDNS = false;
}
if (fDNS && opts.host.empty()) {
tfm::format(std::cerr, "No hostname set. Please use -h.\n");
return EXIT_FAILURE;
}
if (fDNS && opts.mbox.empty()) {
tfm::format(std::cerr, "No e-mail address set. Please use -m.\n");
return EXIT_FAILURE;
}
FILE *f = fsbridge::fopen("dnsseed.dat", "r");
if (f) {
tfm::format(std::cout, "Loading dnsseed.dat...");
CAutoFile cf(f, SER_DISK, CLIENT_VERSION);
cf >> db;
if (opts.fWipeBan) {
db.banned.clear();
tfm::format(std::cout, "Ban list wiped...");
}
if (opts.fWipeIgnore) {
db.ResetIgnores();
tfm::format(std::cout, "Ignore list wiped...");
}
tfm::format(std::cout, "done\n");
}
pthread_t threadDns, threadSeed, threadDump, threadStats;
if (fDNS) {
tfm::format(std::cout,
"Starting %i DNS threads for %s on %s (port %i)...",
opts.nDnsThreads, opts.host, opts.ns, opts.nPort);
dnsThread.clear();
for (int i = 0; i < opts.nDnsThreads; i++) {
dnsThread.push_back(new CDnsThread(&opts, i));
pthread_create(&threadDns, nullptr, ThreadDNS, dnsThread[i]);
tfm::format(std::cout, ".");
Sleep(20);
}
tfm::format(std::cout, "done\n");
}
tfm::format(std::cout, "Starting seeder...");
pthread_create(&threadSeed, nullptr, ThreadSeeder, nullptr);
tfm::format(std::cout, "done\n");
tfm::format(std::cout, "Starting %i crawler threads...", opts.nThreads);
pthread_attr_t attr_crawler;
pthread_attr_init(&attr_crawler);
pthread_attr_setstacksize(&attr_crawler, 0x20000);
for (int i = 0; i < opts.nThreads; i++) {
pthread_t thread;
pthread_create(&thread, &attr_crawler, ThreadCrawler, &opts.nThreads);
}
pthread_attr_destroy(&attr_crawler);
tfm::format(std::cout, "done\n");
pthread_create(&threadStats, nullptr, ThreadStats, nullptr);
pthread_create(&threadDump, nullptr, ThreadDumper, nullptr);
void *res;
pthread_join(threadDump, &res);
return EXIT_SUCCESS;
}

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