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/****************************************************************************
* apps/include/netutils/dnsclient.h
* DNS resolver code header file.
* Author Adam Dunkels <adam@dunkels.com>
*
* Copyright (C) 2007-2009, 2011-2012, 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Inspired by/based on uIP logic by Adam Dunkels:
*
* Copyright (c) 2002-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __APPS_INCLUDE_NETUTILS_DNSCLIENT_H
#define __APPS_INCLUDE_NETUTILS_DNSCLIENT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/net/uip/uipopt.h>
#include <netinet/in.h>
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: dns_bind_sock
*
* Description:
* Initialize the DNS resolver using the caller provided socket.
*
****************************************************************************/
int dns_bind_sock(FAR int *sockfd);
/****************************************************************************
* Name: dns_bind
*
* Description:
* Initialize the DNS resolver using an internal, share-able socket.
*
****************************************************************************/
int dns_bind(void);
/****************************************************************************
* Name: dns_free_sock
*
* Description:
* Release the DNS resolver by closing the socket.
*
****************************************************************************/
int dns_free_sock(FAR int *sockfd);
/****************************************************************************
* Name: dns_query_sock
*
* Description:
* Using the DNS resolver socket (sockfd), look up the the 'hostname', and
* return its IP address in 'ipaddr'
*
* Returned Value:
* Returns zero (OK) if the query was successful.
*
****************************************************************************/
int dns_query_sock(int sockfd, FAR const char *hostname, FAR in_addr_t *ipaddr);
/****************************************************************************
* Name: dns_query
*
* Description:
* Using the internal DNS resolver socket, look up the the 'hostname', and
* return its IP address in 'ipaddr'
*
* Returned Value:
* Returns zero (OK) if the query was successful.
*
****************************************************************************/
int dns_query(FAR const char *hostname, FAR in_addr_t *ipaddr);
/****************************************************************************
* Name: dns_setserver
*
* Description:
* Configure which DNS server to use for queries
*
****************************************************************************/
#ifdef CONFIG_NET_IPv6
void dns_setserver(FAR const struct in6_addr *dnsserver);
#else
void dns_setserver(FAR const struct in_addr *dnsserver);
#endif
/****************************************************************************
* Name: dns_getserver
*
* Description:
* Obtain the currently configured DNS server.
*
****************************************************************************/
#ifdef CONFIG_NET_IPv6
void dns_getserver(FAR const struct in_addr *dnsserver);
#else
void dns_getserver(FAR struct in_addr *dnsserver);
#endif
/****************************************************************************
* Name: dns_whois_socket
*
* Description:
* Get the binding for 'name' using the DNS server accessed via 'sockfd'
*
****************************************************************************/
#ifdef CONFIG_NET_IPv6
int dns_whois_socket(int sockfd, FAR const char *name,
FAR struct sockaddr_in6 *addr);
#else
int dns_whois_socket(int sockfd, FAR const char *name,
FAR struct sockaddr_in *addr);
#endif
/****************************************************************************
* Name: dns_whois
*
* Description:
* Get the binding for 'name' using the DNS server accessed via the DNS
* resolvers internal socket.
*
****************************************************************************/
#ifdef CONFIG_NET_IPv6
int dns_whois(FAR const char *name, FAR struct sockaddr_in6 *addr);
#else
int dns_whois(FAR const char *name, FAR struct sockaddr_in *addr);
#endif
/****************************************************************************
* Name: dns_gethostip
*
* Descriptions:
* Combines the operations of dns_bind_sock(), dns_query_sock(), and
* dns_free_sock() to obtain the the IP address ('ipaddr') associated with
* the 'hostname' in one operation.
*
****************************************************************************/
int dns_gethostip(FAR const char *hostname, FAR in_addr_t *ipaddr);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __APPS_INCLUDE_NETUTILS_DNSCLIENT_H */
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