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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_130/] [src/] [include/] [lwip/] [dns.h] - Rev 610
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/** * lwip DNS resolver header file. * Author: Jim Pettinato * April 2007 * ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels. * * 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 __LWIP_DNS_H__ #define __LWIP_DNS_H__ #include "lwip/opt.h" #if LWIP_DNS /* don't build if not configured for use in lwipopts.h */ /** DNS timer period */ #define DNS_TMR_INTERVAL 1000 /** DNS field TYPE used for "Resource Records" */ #define DNS_RRTYPE_A 1 /* a host address */ #define DNS_RRTYPE_NS 2 /* an authoritative name server */ #define DNS_RRTYPE_MD 3 /* a mail destination (Obsolete - use MX) */ #define DNS_RRTYPE_MF 4 /* a mail forwarder (Obsolete - use MX) */ #define DNS_RRTYPE_CNAME 5 /* the canonical name for an alias */ #define DNS_RRTYPE_SOA 6 /* marks the start of a zone of authority */ #define DNS_RRTYPE_MB 7 /* a mailbox domain name (EXPERIMENTAL) */ #define DNS_RRTYPE_MG 8 /* a mail group member (EXPERIMENTAL) */ #define DNS_RRTYPE_MR 9 /* a mail rename domain name (EXPERIMENTAL) */ #define DNS_RRTYPE_NULL 10 /* a null RR (EXPERIMENTAL) */ #define DNS_RRTYPE_WKS 11 /* a well known service description */ #define DNS_RRTYPE_PTR 12 /* a domain name pointer */ #define DNS_RRTYPE_HINFO 13 /* host information */ #define DNS_RRTYPE_MINFO 14 /* mailbox or mail list information */ #define DNS_RRTYPE_MX 15 /* mail exchange */ #define DNS_RRTYPE_TXT 16 /* text strings */ /** DNS field CLASS used for "Resource Records" */ #define DNS_RRCLASS_IN 1 /* the Internet */ #define DNS_RRCLASS_CS 2 /* the CSNET class (Obsolete - used only for examples in some obsolete RFCs) */ #define DNS_RRCLASS_CH 3 /* the CHAOS class */ #define DNS_RRCLASS_HS 4 /* Hesiod [Dyer 87] */ #define DNS_RRCLASS_FLUSH 0x800 /* Flush bit */ /** Callback which is invoked when a hostname is found. * A function of this type must be implemented by the application using the DNS resolver. * @param name pointer to the name that was looked up. * @param ipaddr pointer to a struct ip_addr containing the IP address of the hostname, * or NULL if the name could not be found (or on any other error). * @param callback_arg a user-specified callback argument passed to dns_gethostbyname */ typedef void (*dns_found_callback)(const char *name, struct ip_addr *ipaddr, void *callback_arg); void dns_init(void); void dns_tmr(void); void dns_setserver(u8_t numdns, struct ip_addr *dnsserver); struct ip_addr dns_getserver(u8_t numdns); err_t dns_gethostbyname(const char *hostname, struct ip_addr *addr, dns_found_callback found, void *callback_arg); #endif /* LWIP_DNS */ #endif /* __LWIP_DNS_H__ */
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