Pehr Hovey / Mbed 2 deprecated UDPtest

Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed

Dependencies:   mbed

Core/lwIP/include/lwip/dns.h@0:a548a085de55, 2010-03-14 (annotated)

Committer:
pehrhovey
Date:
Sun Mar 14 00:54:12 2010 +0000
Revision:
0:a548a085de55

        

        
Who changed what in which revision?

        

            
                
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/**





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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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#include "lwip/err.h"





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#ifdef __cplusplus





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extern "C" {





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#endif





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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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#ifdef __cplusplus





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};





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#endif





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#endif /* LWIP_DNS */





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#endif /* __LWIP_DNS_H__ */