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/*
*
* (C) 2013-22 - ntop.org
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef _MDNS_H_
#define _MDNS_H_
#include "ntop_includes.h"
class NetworkInterface;
/* ******************************* */
class MDNS {
private:
int udp_sock, batch_udp_sock;
u_int32_t gatewayIPv4;
bool sentAnyQuery;
pthread_t resolverCheck;
u_int16_t buildMDNSRequest(char *query, u_int8_t query_type,
char *mdnsbuf, u_int mdnsbuf_len,
u_int16_t tid);
u_int16_t prepareIPv4ResolveQuery(u_int32_t ipv4addr /* network byte order */,
char *mdnsbuf, u_int mdnsbuf_len,
u_int16_t tid = 0);
u_int16_t prepareAnyQuery(char *query, char *mdnsbuf, u_int mdnsbuf_len,
u_int16_t tid = 0);
char* decodePTRResponse(char *mdnsbuf, u_int mdnsbuf_len,
char *buf, u_int buf_len,
u_int32_t *resolved_ip);
char* decodeAnyResponse(char *mdnsbuf, u_int mdnsbuf_len,
char *buf, u_int buf_len);
char* decodeNetBIOS(u_char *buf, u_int buf_len, char *out, u_int out_len);
public:
MDNS(NetworkInterface *iface);
~MDNS();
void initializeResolver();
/* Batch interface (via Lua) */
bool sendAnyQuery(char *targetIPv4, char *query);
bool queueResolveIPv4(u_int32_t ipv4addr, bool alsoUseGatewayDNS);
void fetchResolveResponses(lua_State* vm, int32_t timeout_sec);
};
#endif /* _MDNS_H_ */
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