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/*
* Copyright (C) 2012 Tobias Brunner
* HSR Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
/**
* @defgroup host_resolver host_resolver
* @{ @ingroup networking
*/
#ifndef HOST_RESOLVER_H_
#define HOST_RESOLVER_H_
#include "host.h"
typedef struct host_resolver_t host_resolver_t;
/**
* Resolve hosts by DNS name but do so in a separate thread (calling
* getaddrinfo(3) directly might block indefinitely, or at least a very long
* time if no DNS servers are reachable).
*/
struct host_resolver_t {
/**
* Resolve host from the given DNS name.
*
* @param name name to lookup
* @param family requested address family
* @return resolved host or NULL if failed or canceled
*/
host_t *(*resolve)(host_resolver_t *this, char *name, int family);
/**
* Flush the queue of queries. No new queries will be accepted afterwards.
*/
void (*flush)(host_resolver_t *this);
/**
* Destroy a host_resolver_t.
*/
void (*destroy)(host_resolver_t *this);
};
/**
* Create a host_resolver_t instance.
*/
host_resolver_t *host_resolver_create();
#endif /** HOST_RESOLVER_H_ @}*/
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