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/*
* Author Jerry Lundström <jerry@dns-oarc.net>
* Copyright (c) 2019-2023, OARC, Inc.
* All rights reserved.
*
* This file is part of the dnswire library.
*
* dnswire library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* dnswire library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with dnswire library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "dnswire/dnstap.h"
const char* const DNSTAP_TYPE_STRING[] = {
"UNKNOWN",
"MESSAGE",
};
const char* const DNSTAP_MESSAGE_TYPE_STRING[] = {
"UNKNOWN",
"AUTH_QUERY",
"AUTH_RESPONSE",
"RESOLVER_QUERY",
"RESOLVER_RESPONSE",
"CLIENT_QUERY",
"CLIENT_RESPONSE",
"FORWARDER_QUERY",
"FORWARDER_RESPONSE",
"STUB_QUERY",
"STUB_RESPONSE",
"TOOL_QUERY",
"TOOL_RESPONSE",
"UPDATE_QUERY",
"UPDATE_RESPONSE",
};
const char* const DNSTAP_SOCKET_FAMILY_STRING[] = {
"UNKNOWN",
"INET",
"INET6",
};
const char* const DNSTAP_SOCKET_PROTOCOL_STRING[] = {
"UNKNOWN",
"UDP",
"TCP",
"DOT",
"DOH",
"DNSCryptUDP",
"DNSCryptTCP",
"DOQ",
};
const char* const DNSTAP_POLICY_ACTION_STRING[] = {
"UNKNOWN",
"NXDOMAIN",
"NODATA",
"PASS",
"DROP",
"TRUNCATE",
"LOCAL_DATA",
};
const char* const DNSTAP_POLICY_MATCH_STRING[] = {
"UNKNOWN",
"QNAME",
"CLIENT_IP",
"RESPONSE_IP",
"NS_NAME",
"NS_IP",
};
void dnstap_message_clear_policy(struct dnstap* dnstap)
{
static const Dnstap__Policy policy = DNSTAP__POLICY__INIT;
assert(dnstap);
dnstap->message.policy = 0;
dnstap->policy = policy;
}
int dnstap_decode_protobuf(struct dnstap* dnstap, const uint8_t* data, size_t len)
{
assert(dnstap);
assert(data);
assert(!dnstap->unpacked_dnstap);
if (!(dnstap->unpacked_dnstap = dnstap__dnstap__unpack(NULL, len, data))) {
return 1;
}
dnstap->dnstap = *dnstap->unpacked_dnstap;
switch (dnstap->dnstap.type) {
case DNSTAP_TYPE_MESSAGE:
break;
default:
dnstap->dnstap.type = (enum _Dnstap__Dnstap__Type)DNSTAP_TYPE_UNKNOWN;
}
if (dnstap->dnstap.message) {
dnstap->message = *dnstap->dnstap.message;
switch (dnstap->message.type) {
case DNSTAP_MESSAGE_TYPE_AUTH_QUERY:
case DNSTAP_MESSAGE_TYPE_AUTH_RESPONSE:
case DNSTAP_MESSAGE_TYPE_RESOLVER_QUERY:
case DNSTAP_MESSAGE_TYPE_RESOLVER_RESPONSE:
case DNSTAP_MESSAGE_TYPE_CLIENT_QUERY:
case DNSTAP_MESSAGE_TYPE_CLIENT_RESPONSE:
case DNSTAP_MESSAGE_TYPE_FORWARDER_QUERY:
case DNSTAP_MESSAGE_TYPE_FORWARDER_RESPONSE:
case DNSTAP_MESSAGE_TYPE_STUB_QUERY:
case DNSTAP_MESSAGE_TYPE_STUB_RESPONSE:
case DNSTAP_MESSAGE_TYPE_TOOL_QUERY:
case DNSTAP_MESSAGE_TYPE_TOOL_RESPONSE:
case DNSTAP_MESSAGE_TYPE_UPDATE_QUERY:
case DNSTAP_MESSAGE_TYPE_UPDATE_RESPONSE:
break;
default:
dnstap->message.type = (enum _Dnstap__Message__Type)DNSTAP_MESSAGE_TYPE_UNKNOWN;
}
switch (dnstap->message.socket_family) {
case DNSTAP_SOCKET_FAMILY_INET:
case DNSTAP_SOCKET_FAMILY_INET6:
break;
default:
dnstap->message.has_socket_family = false;
dnstap->message.socket_family = (enum _Dnstap__SocketFamily)DNSTAP_SOCKET_FAMILY_UNKNOWN;
}
switch (dnstap->message.socket_protocol) {
case DNSTAP_SOCKET_PROTOCOL_UDP:
case DNSTAP_SOCKET_PROTOCOL_TCP:
case DNSTAP_SOCKET_PROTOCOL_DOT:
case DNSTAP_SOCKET_PROTOCOL_DOH:
case DNSTAP_SOCKET_PROTOCOL_DNSCryptUDP:
case DNSTAP_SOCKET_PROTOCOL_DNSCryptTCP:
case DNSTAP_SOCKET_PROTOCOL_DOQ:
break;
default:
dnstap->message.has_socket_protocol = false;
dnstap->message.socket_protocol = (enum _Dnstap__SocketProtocol)DNSTAP_SOCKET_PROTOCOL_UNKNOWN;
}
if (dnstap->message.policy) {
dnstap->policy = *dnstap->message.policy;
switch (dnstap->policy.action) {
case DNSTAP_POLICY_ACTION_NXDOMAIN:
case DNSTAP_POLICY_ACTION_NODATA:
case DNSTAP_POLICY_ACTION_PASS:
case DNSTAP_POLICY_ACTION_DROP:
case DNSTAP_POLICY_ACTION_TRUNCATE:
case DNSTAP_POLICY_ACTION_LOCAL_DATA:
break;
default:
dnstap->policy.has_action = false;
dnstap->policy.action = (enum _Dnstap__Policy__Action)DNSTAP_POLICY_ACTION_UNKNOWN;
}
switch (dnstap->policy.match) {
case DNSTAP_POLICY_MATCH_QNAME:
case DNSTAP_POLICY_MATCH_CLIENT_IP:
case DNSTAP_POLICY_MATCH_RESPONSE_IP:
case DNSTAP_POLICY_MATCH_NS_NAME:
case DNSTAP_POLICY_MATCH_NS_IP:
break;
default:
dnstap->policy.has_match = false;
dnstap->policy.match = (enum _Dnstap__Policy__Match)DNSTAP_POLICY_MATCH_UNKNOWN;
}
}
}
return 0;
}
void dnstap_cleanup(struct dnstap* dnstap)
{
assert(dnstap);
if (dnstap->unpacked_dnstap) {
dnstap__dnstap__free_unpacked(dnstap->unpacked_dnstap, NULL);
dnstap->unpacked_dnstap = 0;
}
}
size_t dnstap_encode_protobuf_size(const struct dnstap* dnstap)
{
assert(dnstap);
return dnstap__dnstap__get_packed_size(&dnstap->dnstap);
}
size_t dnstap_encode_protobuf(const struct dnstap* dnstap, uint8_t* data)
{
assert(dnstap);
assert(data);
return dnstap__dnstap__pack(&dnstap->dnstap, data);
}
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