Simon Ford / NetServices

Version of http://mbed.org/cookbook/NetServicesTribute with setting set the same for LPC2368

Dependents:   UDPSocketExample 24LCxx_I2CApp WeatherPlatform_pachube HvZServerLib ... more

lwip/include/lwip/dns.h@0:350011bf8be7, 2010-11-23 (annotated)

Committer:
simon
Date:
Tue Nov 23 14:15:36 2010 +0000
Revision:
0:350011bf8be7
Experimental version for testing UDP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon 0:350011bf8be7 1 /**
simon 0:350011bf8be7 2 * lwip DNS resolver header file.
simon 0:350011bf8be7 3
simon 0:350011bf8be7 4 * Author: Jim Pettinato
simon 0:350011bf8be7 5 * April 2007
simon 0:350011bf8be7 6
simon 0:350011bf8be7 7 * ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels.
simon 0:350011bf8be7 8 *
simon 0:350011bf8be7 9 * Redistribution and use in source and binary forms, with or without
simon 0:350011bf8be7 10 * modification, are permitted provided that the following conditions
simon 0:350011bf8be7 11 * are met:
simon 0:350011bf8be7 12 * 1. Redistributions of source code must retain the above copyright
simon 0:350011bf8be7 13 * notice, this list of conditions and the following disclaimer.
simon 0:350011bf8be7 14 * 2. Redistributions in binary form must reproduce the above copyright
simon 0:350011bf8be7 15 * notice, this list of conditions and the following disclaimer in the
simon 0:350011bf8be7 16 * documentation and/or other materials provided with the distribution.
simon 0:350011bf8be7 17 * 3. The name of the author may not be used to endorse or promote
simon 0:350011bf8be7 18 * products derived from this software without specific prior
simon 0:350011bf8be7 19 * written permission.
simon 0:350011bf8be7 20 *
simon 0:350011bf8be7 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
simon 0:350011bf8be7 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
simon 0:350011bf8be7 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
simon 0:350011bf8be7 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
simon 0:350011bf8be7 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
simon 0:350011bf8be7 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
simon 0:350011bf8be7 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
simon 0:350011bf8be7 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
simon 0:350011bf8be7 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
simon 0:350011bf8be7 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
simon 0:350011bf8be7 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
simon 0:350011bf8be7 32 */
simon 0:350011bf8be7 33
simon 0:350011bf8be7 34 #ifndef __LWIP_DNS_H__
simon 0:350011bf8be7 35 #define __LWIP_DNS_H__
simon 0:350011bf8be7 36
simon 0:350011bf8be7 37 #include "lwip/opt.h"
simon 0:350011bf8be7 38
simon 0:350011bf8be7 39 #if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
simon 0:350011bf8be7 40
simon 0:350011bf8be7 41 /** DNS timer period */
simon 0:350011bf8be7 42 #define DNS_TMR_INTERVAL 1000
simon 0:350011bf8be7 43
simon 0:350011bf8be7 44 /** DNS field TYPE used for "Resource Records" */
simon 0:350011bf8be7 45 #define DNS_RRTYPE_A 1 /* a host address */
simon 0:350011bf8be7 46 #define DNS_RRTYPE_NS 2 /* an authoritative name server */
simon 0:350011bf8be7 47 #define DNS_RRTYPE_MD 3 /* a mail destination (Obsolete - use MX) */
simon 0:350011bf8be7 48 #define DNS_RRTYPE_MF 4 /* a mail forwarder (Obsolete - use MX) */
simon 0:350011bf8be7 49 #define DNS_RRTYPE_CNAME 5 /* the canonical name for an alias */
simon 0:350011bf8be7 50 #define DNS_RRTYPE_SOA 6 /* marks the start of a zone of authority */
simon 0:350011bf8be7 51 #define DNS_RRTYPE_MB 7 /* a mailbox domain name (EXPERIMENTAL) */
simon 0:350011bf8be7 52 #define DNS_RRTYPE_MG 8 /* a mail group member (EXPERIMENTAL) */
simon 0:350011bf8be7 53 #define DNS_RRTYPE_MR 9 /* a mail rename domain name (EXPERIMENTAL) */
simon 0:350011bf8be7 54 #define DNS_RRTYPE_NULL 10 /* a null RR (EXPERIMENTAL) */
simon 0:350011bf8be7 55 #define DNS_RRTYPE_WKS 11 /* a well known service description */
simon 0:350011bf8be7 56 #define DNS_RRTYPE_PTR 12 /* a domain name pointer */
simon 0:350011bf8be7 57 #define DNS_RRTYPE_HINFO 13 /* host information */
simon 0:350011bf8be7 58 #define DNS_RRTYPE_MINFO 14 /* mailbox or mail list information */
simon 0:350011bf8be7 59 #define DNS_RRTYPE_MX 15 /* mail exchange */
simon 0:350011bf8be7 60 #define DNS_RRTYPE_TXT 16 /* text strings */
simon 0:350011bf8be7 61
simon 0:350011bf8be7 62 /** DNS field CLASS used for "Resource Records" */
simon 0:350011bf8be7 63 #define DNS_RRCLASS_IN 1 /* the Internet */
simon 0:350011bf8be7 64 #define DNS_RRCLASS_CS 2 /* the CSNET class (Obsolete - used only for examples in some obsolete RFCs) */
simon 0:350011bf8be7 65 #define DNS_RRCLASS_CH 3 /* the CHAOS class */
simon 0:350011bf8be7 66 #define DNS_RRCLASS_HS 4 /* Hesiod [Dyer 87] */
simon 0:350011bf8be7 67 #define DNS_RRCLASS_FLUSH 0x800 /* Flush bit */
simon 0:350011bf8be7 68
simon 0:350011bf8be7 69 /* The size used for the next line is rather a hack, but it prevents including socket.h in all files
simon 0:350011bf8be7 70 that include memp.h, and that would possibly break portability (since socket.h defines some types
simon 0:350011bf8be7 71 and constants possibly already define by the OS).
simon 0:350011bf8be7 72 Calculation rule:
simon 0:350011bf8be7 73 sizeof(struct addrinfo) + sizeof(struct sockaddr_in) + DNS_MAX_NAME_LENGTH + 1 byte zero-termination */
simon 0:350011bf8be7 74 #define NETDB_ELEM_SIZE (32 + 16 + DNS_MAX_NAME_LENGTH + 1)
simon 0:350011bf8be7 75
simon 0:350011bf8be7 76 #if DNS_LOCAL_HOSTLIST
simon 0:350011bf8be7 77 /** struct used for local host-list */
simon 0:350011bf8be7 78 struct local_hostlist_entry {
simon 0:350011bf8be7 79 /** static hostname */
simon 0:350011bf8be7 80 const char *name;
simon 0:350011bf8be7 81 /** static host address in network byteorder */
simon 0:350011bf8be7 82 ip_addr_t addr;
simon 0:350011bf8be7 83 struct local_hostlist_entry *next;
simon 0:350011bf8be7 84 };
simon 0:350011bf8be7 85 #if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
simon 0:350011bf8be7 86 #ifndef DNS_LOCAL_HOSTLIST_MAX_NAMELEN
simon 0:350011bf8be7 87 #define DNS_LOCAL_HOSTLIST_MAX_NAMELEN DNS_MAX_NAME_LENGTH
simon 0:350011bf8be7 88 #endif
simon 0:350011bf8be7 89 #define LOCALHOSTLIST_ELEM_SIZE ((sizeof(struct local_hostlist_entry) + DNS_LOCAL_HOSTLIST_MAX_NAMELEN + 1))
simon 0:350011bf8be7 90 #endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
simon 0:350011bf8be7 91 #endif /* DNS_LOCAL_HOSTLIST */
simon 0:350011bf8be7 92
simon 0:350011bf8be7 93 /** Callback which is invoked when a hostname is found.
simon 0:350011bf8be7 94 * A function of this type must be implemented by the application using the DNS resolver.
simon 0:350011bf8be7 95 * @param name pointer to the name that was looked up.
simon 0:350011bf8be7 96 * @param ipaddr pointer to an ip_addr_t containing the IP address of the hostname,
simon 0:350011bf8be7 97 * or NULL if the name could not be found (or on any other error).
simon 0:350011bf8be7 98 * @param callback_arg a user-specified callback argument passed to dns_gethostbyname
simon 0:350011bf8be7 99 */
simon 0:350011bf8be7 100 typedef void (*dns_found_callback)(const char *name, ip_addr_t *ipaddr, void *callback_arg);
simon 0:350011bf8be7 101
simon 0:350011bf8be7 102 void dns_init(void);
simon 0:350011bf8be7 103 void dns_tmr(void);
simon 0:350011bf8be7 104 void dns_setserver(u8_t numdns, ip_addr_t *dnsserver);
simon 0:350011bf8be7 105 ip_addr_t dns_getserver(u8_t numdns);
simon 0:350011bf8be7 106 err_t dns_gethostbyname(const char *hostname, ip_addr_t *addr,
simon 0:350011bf8be7 107 dns_found_callback found, void *callback_arg);
simon 0:350011bf8be7 108
simon 0:350011bf8be7 109 #if DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC
simon 0:350011bf8be7 110 int dns_local_removehost(const char *hostname, const ip_addr_t *addr);
simon 0:350011bf8be7 111 err_t dns_local_addhost(const char *hostname, const ip_addr_t *addr);
simon 0:350011bf8be7 112 #endif /* DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
simon 0:350011bf8be7 113
simon 0:350011bf8be7 114 #endif /* LWIP_DNS */
simon 0:350011bf8be7 115
simon 0:350011bf8be7 116 #endif /* __LWIP_DNS_H__ */