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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
* originally authored by Norbert Sendetzky
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "exceptions.hh"
#include "ldapbackend.hh"
#include <cstdlib>
void LdapBackend::getUpdatedPrimaries(vector<DomainInfo>& domains, std::unordered_set<DNSName>& catalogs, CatalogHashMap& catalogHashes)
{
string filter;
PowerLDAP::SearchResult::Ptr search;
PowerLDAP::sentry_t result;
const char* attronly[] = {
"associatedDomain",
NULL};
try {
// First get all domains on which we are primary.
filter = strbind(":target:", "&(SOARecord=*)(PdnsDomainId=*)", getArg("filter-axfr"));
search = d_pldap->search(getArg("basedn"), LDAP_SCOPE_SUBTREE, filter, attronly);
}
catch (LDAPTimeout& lt) {
g_log << Logger::Warning << d_myname << " Unable to search LDAP directory: " << lt.what() << endl;
throw DBException("LDAP server timeout");
}
catch (LDAPNoConnection& lnc) {
g_log << Logger::Warning << d_myname << " Connection to LDAP lost, trying to reconnect" << endl;
if (reconnect())
this->getUpdatedPrimaries(domains, catalogs, catalogHashes);
else
throw PDNSException("Failed to reconnect to LDAP server");
}
catch (LDAPException& le) {
g_log << Logger::Error << d_myname << " Unable to search LDAP directory: " << le.what() << endl;
throw PDNSException("LDAP server unreachable"); // try to reconnect to another server
}
catch (std::exception& e) {
throw DBException("STL exception");
}
while (search->getNext(result)) {
if (!result.count("associatedDomain") || result["associatedDomain"].empty())
continue;
DomainInfo di;
if (!getDomainInfo(ZoneName(result["associatedDomain"][0]), di)) {
continue;
}
if (di.notified_serial < di.serial)
domains.push_back(di);
}
}
// NOLINTNEXTLINE(readability-identifier-length)
void LdapBackend::setNotified(domainid_t id, uint32_t serial)
{
string filter;
PowerLDAP::SearchResult::Ptr search;
PowerLDAP::sresult_t results;
PowerLDAP::sentry_t entry;
const char* attronly[] = {"associatedDomain", NULL};
try {
// Try to find the notified domain
filter = strbind(":target:", "PdnsDomainId=" + std::to_string(id), getArg("filter-axfr"));
search = d_pldap->search(getArg("basedn"), LDAP_SCOPE_SUBTREE, filter, attronly);
search->getAll(results, true);
}
catch (LDAPTimeout& lt) {
g_log << Logger::Warning << d_myname << " Unable to search LDAP directory: " << lt.what() << endl;
throw DBException("LDAP server timeout");
}
catch (LDAPNoConnection& lnc) {
g_log << Logger::Warning << d_myname << " Connection to LDAP lost, trying to reconnect" << endl;
if (reconnect())
this->setNotified(id, serial);
else
throw PDNSException("Failed to reconnect to LDAP server");
}
catch (LDAPException& le) {
g_log << Logger::Error << d_myname << " Unable to search LDAP directory: " << le.what() << endl;
throw PDNSException("LDAP server unreachable"); // try to reconnect to another server
}
catch (std::exception& e) {
throw DBException("STL exception");
}
if (results.empty())
throw PDNSException("No results found when trying to update domain notified_serial for ID " + std::to_string(id));
entry = results.front();
string dn = entry["dn"][0];
string serialStr = std::to_string(serial);
LDAPMod* mods[2];
LDAPMod mod;
char* vals[2];
mod.mod_op = LDAP_MOD_REPLACE;
mod.mod_type = (char*)"PdnsDomainNotifiedSerial";
vals[0] = const_cast<char*>(serialStr.c_str());
vals[1] = NULL;
mod.mod_values = vals;
mods[0] = &mod;
mods[1] = NULL;
try {
d_pldap->modify(dn, mods);
}
catch (LDAPNoConnection& lnc) {
g_log << Logger::Warning << d_myname << " Connection to LDAP lost, trying to reconnect" << endl;
if (reconnect())
this->setNotified(id, serial);
else
throw PDNSException("Failed to reconnect to LDAP server");
}
catch (LDAPException& le) {
g_log << Logger::Error << d_myname << " Unable to search LDAP directory: " << le.what() << endl;
throw PDNSException("LDAP server unreachable"); // try to reconnect to another server
}
catch (std::exception& e) {
throw DBException("STL exception");
}
}
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