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various changes to runtime checkpoint updating

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json checkpoints will be checked every 10 minutes, dns every 60.

json checkpoints always enforced, dns still with flag.

conflicting checkpoints is hard fail, but soft if dns enforce flag not
set and dns checkpoints are wonky.
This commit is contained in:
Thomas Winget
2014-09-29 16:30:47 -04:00
parent 7568f89c55
commit f0b4138f1f
7 changed files with 113 additions and 23 deletions
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43
src/cryptonote_core/checkpoints_create.cpp
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@@ -32,6 +32,7 @@
#include "common/dns_utils.h"
#include "include_base_utils.h"
#include <sstream>
#include <random>
#include "storages/portable_storage_template_helper.h" // epee json include
namespace cryptonote
@@ -110,15 +111,47 @@ bool load_checkpoints_from_json(cryptonote::checkpoints& checkpoints, std::strin
return true;
}
bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints, const std::string& url)
bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints)
{
static const std::vector<std::string> dns_urls = { "checkpoints.moneropulse.se"
, "checkpoints.moneropulse.org"
, "checkpoints.moneropulse.net"
, "checkpoints.moneropulse.co"
};
bool avail, valid;
auto records = tools::DNSResolver::instance().get_txt_record(url, avail, valid);
std::vector<std::string> records;
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<int> dis(0, dns_urls.size() - 1);
int first_index = dis(gen);
int cur_index = first_index;
do
{
records = tools::DNSResolver::instance().get_txt_record(dns_urls[cur_index], avail, valid);
if (records.size() == 0 || (avail && !valid))
{
cur_index++;
if (cur_index == dns_urls.size())
{
cur_index = 0;
}
continue;
}
break;
} while (cur_index != first_index);
if (records.size() == 0)
{
LOG_PRINT_L1("Fetching checkpoints from DNS TXT records failed, no TXT records available.");
return true;
}
if (avail && !valid)
{
LOG_ERROR("DNSSEC present and failed validation for query to" << url);
return false;
LOG_PRINT_L0("DNSSEC present and failed validation for query last url, and all other urls either failed validation or returned no records");
return true;
}
for (auto& record : records)
@@ -154,7 +187,7 @@ bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints, const std::
bool load_new_checkpoints(cryptonote::checkpoints& checkpoints, std::string json_hashfile_fullpath)
{
// TODO: replace hard-coded url with const string or #define
return (load_checkpoints_from_json(checkpoints, json_hashfile_fullpath) && load_checkpoints_from_dns(checkpoints, "checkpoints.moneropulse.org"));
return (load_checkpoints_from_json(checkpoints, json_hashfile_fullpath) && load_checkpoints_from_dns(checkpoints));
}
} // namespace cryptonote