2 * $Id: rfc1035.h,v 1.20 2008/01/11 03:49:20 amosjeffries Exp $
4 * AUTHOR: Duane Wessels
6 * SQUID Web Proxy Cache http://www.squid-cache.org/
7 * ----------------------------------------------------------
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13 * Copyrighted (C) 2001 by the Regents of the University of
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18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
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30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
33 #ifndef SQUID_RFC1035_H
34 #define SQUID_RFC1035_H
39 #include <sys/types.h>
42 #include <netinet/in.h>
45 #include <arpa/inet.h>
51 \par RFC 1035 Section 3.1:
52 * To simplify implementations, the total length of a domain name (i.e.,
53 * label octets and label length octets) is restricted to 255 octets or
56 * Clarified by RFC 2181 Section 11. (RFC2181_MAXHOSTNAMELEN)
58 #define RFC1035_MAXHOSTNAMESZ RFC2181_MAXHOSTNAMELEN
61 typedef struct _rfc1035_rr rfc1035_rr
;
63 char name
[RFC1035_MAXHOSTNAMESZ
];
65 unsigned short _class
;
67 unsigned short rdlength
;
71 typedef struct _rfc1035_query rfc1035_query
;
72 struct _rfc1035_query
{
73 char name
[RFC1035_MAXHOSTNAMESZ
];
75 unsigned short qclass
;
78 typedef struct _rfc1035_message rfc1035_message
;
79 struct _rfc1035_message
{
82 unsigned int opcode
:4;
88 unsigned short qdcount
;
89 unsigned short ancount
;
90 unsigned short nscount
;
91 unsigned short arcount
;
96 SQUIDCEXTERN ssize_t
rfc1035BuildAQuery(const char *hostname
,
100 rfc1035_query
* query
);
101 SQUIDCEXTERN ssize_t
rfc1035BuildPTRQuery(const struct in_addr
,
105 rfc1035_query
* query
);
106 SQUIDCEXTERN
void rfc1035SetQueryID(char *, unsigned short qid
);
107 SQUIDCEXTERN
int rfc1035MessageUnpack(const char *buf
,
109 rfc1035_message
** answer
);
110 SQUIDCEXTERN
int rfc1035QueryCompare(const rfc1035_query
*, const rfc1035_query
*);
111 SQUIDCEXTERN
void rfc1035RRDestroy(rfc1035_rr
** rr
, int n
);
112 SQUIDCEXTERN
void rfc1035MessageDestroy(rfc1035_message
** message
);
113 SQUIDCEXTERN
int rfc1035_errno
;
114 SQUIDCEXTERN
const char *rfc1035_error_message
;
116 #define RFC1035_TYPE_A 1
117 #define RFC1035_TYPE_CNAME 5
118 #define RFC1035_TYPE_PTR 12
119 #define RFC1035_CLASS_IN 1
122 /* Child Library RFC3596 Depends on some otherwise internal functions */
123 SQUIDCEXTERN
int rfc1035HeaderPack(char *buf
,
125 rfc1035_message
* hdr
);
126 SQUIDCEXTERN
int rfc1035HeaderUnpack(const char *buf
,
129 rfc1035_message
* h
);
130 SQUIDCEXTERN
int rfc1035QuestionPack(char *buf
,
133 const unsigned short type
,
134 const unsigned short _class
);
136 #endif /* SQUID_RFC1035_H */