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add more updates domains and make the voting generic, not just 2/3

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moneromooo-monero 2020-10-15 14:05:52 +00:00
parent 3cbb44a2fd
commit aaa3289e22
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GPG key ID: 686F07454D6CEFC3
3 changed files with 27 additions and 44 deletions
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64
src/common/dns_utils.cpp
View file

@ -484,36 +484,12 @@ std::string get_account_address_as_str_from_url(const std::string& url, bool& dn
return dns_confirm(url, addresses, dnssec_valid);
}
namespace
{
bool dns_records_match(const std::vector<std::string>& a, const std::vector<std::string>& b)
{
if (a.size() != b.size()) return false;
for (const auto& record_in_a : a)
{
bool ok = false;
for (const auto& record_in_b : b)
{
if (record_in_a == record_in_b)
{
ok = true;
break;
}
}
if (!ok) return false;
}
return true;
}
}
bool load_txt_records_from_dns(std::vector<std::string> &good_records, const std::vector<std::string> &dns_urls)
{
// Prevent infinite recursion when distributing
if (dns_urls.empty()) return false;
std::vector<std::vector<std::string> > records;
std::vector<std::set<std::string> > records;
records.resize(dns_urls.size());
size_t first_index = crypto::rand_idx(dns_urls.size());
@ -525,7 +501,9 @@ bool load_txt_records_from_dns(std::vector<std::string> &good_records, const std
for (size_t n = 0; n < dns_urls.size(); ++n)
{
tpool.submit(&waiter,[n, dns_urls, &records, &avail, &valid](){
records[n] = tools::DNSResolver::instance().get_txt_record(dns_urls[n], avail[n], valid[n]);
const auto res = tools::DNSResolver::instance().get_txt_record(dns_urls[n], avail[n], valid[n]);
for (const auto &s: res)
records[n].insert(s);
});
}
waiter.wait();
@ -568,29 +546,31 @@ bool load_txt_records_from_dns(std::vector<std::string> &good_records, const std
return false;
}
int good_records_index = -1;
for (size_t i = 0; i < records.size() - 1; ++i)
typedef std::map<std::set<std::string>, uint32_t> map_t;
map_t record_count;
for (const auto &e: records)
{
if (records[i].size() == 0) continue;
for (size_t j = i + 1; j < records.size(); ++j)
{
if (dns_records_match(records[i], records[j]))
{
good_records_index = i;
break;
}
}
if (good_records_index >= 0) break;
if (!e.empty())
++record_count[e];
}
if (good_records_index < 0)
map_t::const_iterator good_record = record_count.end();
for (map_t::const_iterator i = record_count.begin(); i != record_count.end(); ++i)
{
LOG_PRINT_L0("WARNING: no two DNS TXT records matched");
if (good_record == record_count.end() || i->second > good_record->second)
good_record = i;
}
MDEBUG("Found " << (good_record == record_count.end() ? 0 : good_record->second) << "/" << dns_urls.size() << " matching records from " << num_valid_records << " valid records");
if (good_record == record_count.end() || good_record->second < dns_urls.size() / 2 + 1)
{
LOG_PRINT_L0("WARNING: no majority of DNS TXT records matched (only " << good_record->second << "/" << dns_urls.size() << ")");
return false;
}
good_records = records[good_records_index];
good_records = {};
for (const auto &s: good_record->first)
good_records.push_back(s);
return true;
}

5
src/common/updates.cpp
View file

@ -48,7 +48,10 @@ namespace tools
static const std::vector<std::string> dns_urls = {
"updates.moneropulse.org",
"updates.moneropulse.net",
"updates.moneropulse.co",
"updates.moneropulse.fr",
"updates.moneropulse.de",
"updates.moneropulse.no",
"updates.moneropulse.ch",
"updates.moneropulse.se"
};

2
src/debug_utilities/dns_checks.cpp
View file

@ -131,7 +131,7 @@ int main(int argc, char* argv[])
lookup(LOOKUP_A, {"seeds.moneroseeds.se", "seeds.moneroseeds.ae.org", "seeds.moneroseeds.ch", "seeds.moneroseeds.li"});
lookup(LOOKUP_TXT, {"updates.moneropulse.org", "updates.moneropulse.net", "updates.moneropulse.co", "updates.moneropulse.se"});
lookup(LOOKUP_TXT, {"updates.moneropulse.org", "updates.moneropulse.net", "updates.moneropulse.co", "updates.moneropulse.se", "updates.moneropulse.fr", "updates.moneropulse.de", "updates.moneropulse.no", "updates.moneropulse.ch"});
lookup(LOOKUP_TXT, {"checkpoints.moneropulse.org", "checkpoints.moneropulse.net", "checkpoints.moneropulse.co", "checkpoints.moneropulse.se"});