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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_132/] [src/] [include/] [lwip/] [dns.h] - Blame information for rev 606

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Line No. Rev Author Line
1 606 jeremybenn
/**
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 * lwip DNS resolver header file.
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 * Author: Jim Pettinato
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 *   April 2007
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 * ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. The name of the author may not be used to endorse or promote
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 *    products derived from this software without specific prior
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 *    written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#ifndef __LWIP_DNS_H__
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#define __LWIP_DNS_H__
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#include "lwip/opt.h"
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#if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
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/** DNS timer period */
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#define DNS_TMR_INTERVAL          1000
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/** DNS field TYPE used for "Resource Records" */
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#define DNS_RRTYPE_A              1     /* a host address */
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#define DNS_RRTYPE_NS             2     /* an authoritative name server */
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#define DNS_RRTYPE_MD             3     /* a mail destination (Obsolete - use MX) */
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#define DNS_RRTYPE_MF             4     /* a mail forwarder (Obsolete - use MX) */
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#define DNS_RRTYPE_CNAME          5     /* the canonical name for an alias */
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#define DNS_RRTYPE_SOA            6     /* marks the start of a zone of authority */
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#define DNS_RRTYPE_MB             7     /* a mailbox domain name (EXPERIMENTAL) */
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#define DNS_RRTYPE_MG             8     /* a mail group member (EXPERIMENTAL) */
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#define DNS_RRTYPE_MR             9     /* a mail rename domain name (EXPERIMENTAL) */
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#define DNS_RRTYPE_NULL           10    /* a null RR (EXPERIMENTAL) */
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#define DNS_RRTYPE_WKS            11    /* a well known service description */
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#define DNS_RRTYPE_PTR            12    /* a domain name pointer */
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#define DNS_RRTYPE_HINFO          13    /* host information */
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#define DNS_RRTYPE_MINFO          14    /* mailbox or mail list information */
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#define DNS_RRTYPE_MX             15    /* mail exchange */
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#define DNS_RRTYPE_TXT            16    /* text strings */
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/** DNS field CLASS used for "Resource Records" */
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#define DNS_RRCLASS_IN            1     /* the Internet */
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#define DNS_RRCLASS_CS            2     /* the CSNET class (Obsolete - used only for examples in some obsolete RFCs) */
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#define DNS_RRCLASS_CH            3     /* the CHAOS class */
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#define DNS_RRCLASS_HS            4     /* Hesiod [Dyer 87] */
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#define DNS_RRCLASS_FLUSH         0x800 /* Flush bit */
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/** Callback which is invoked when a hostname is found.
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 * A function of this type must be implemented by the application using the DNS resolver.
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 * @param name pointer to the name that was looked up.
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 * @param ipaddr pointer to a struct ip_addr containing the IP address of the hostname,
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 *        or NULL if the name could not be found (or on any other error).
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 * @param callback_arg a user-specified callback argument passed to dns_gethostbyname
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*/
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typedef void (*dns_found_callback)(const char *name, struct ip_addr *ipaddr, void *callback_arg);
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void           dns_init(void);
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void           dns_tmr(void);
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void           dns_setserver(u8_t numdns, struct ip_addr *dnsserver);
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struct ip_addr dns_getserver(u8_t numdns);
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err_t          dns_gethostbyname(const char *hostname, struct ip_addr *addr,
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                                 dns_found_callback found, void *callback_arg);
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#if DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC
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int            dns_local_removehost(const char *hostname, const struct ip_addr *addr);
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err_t          dns_local_addhost(const char *hostname, const struct ip_addr *addr);
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#endif /* DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
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#endif /* LWIP_DNS */
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#endif /* __LWIP_DNS_H__ */

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