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7b724b86 | 1 | /* |
01efce4b | 2 | * AUTHOR: Duane Wessels |
7b724b86 | 3 | * |
2b6662ba | 4 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
5 | * ---------------------------------------------------------- | |
7b724b86 | 6 | * |
2b6662ba | 7 | * Squid is the result of efforts by numerous individuals from |
8 | * the Internet community; see the CONTRIBUTORS file for full | |
9 | * details. Many organizations have provided support for Squid's | |
10 | * development; see the SPONSORS file for full details. Squid is | |
11 | * Copyrighted (C) 2001 by the Regents of the University of | |
12 | * California; see the COPYRIGHT file for full details. Squid | |
13 | * incorporates software developed and/or copyrighted by other | |
14 | * sources; see the CREDITS file for full details. | |
7b724b86 | 15 | * |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
c5dd4956 | 20 | * |
7b724b86 | 21 | * This program is distributed in the hope that it will be useful, |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
c5dd4956 | 25 | * |
7b724b86 | 26 | * You should have received a copy of the GNU General Public License |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
c5dd4956 | 29 | * |
7b724b86 | 30 | */ |
b5638623 | 31 | #ifndef SQUID_RFC1035_H |
32 | #define SQUID_RFC1035_H | |
7b724b86 | 33 | |
7b724b86 | 34 | #if HAVE_SYS_TYPES_H |
35 | #include <sys/types.h> | |
36 | #endif | |
37 | #if HAVE_NETINET_IN_H | |
38 | #include <netinet/in.h> | |
39 | #endif | |
40 | #if HAVE_ARPA_INET_H | |
41 | #include <arpa/inet.h> | |
42 | #endif | |
43 | ||
e1f7507e AJ |
44 | #include "rfc2181.h" |
45 | ||
46 | /** | |
47 | \par RFC 1035 Section 3.1: | |
48 | * To simplify implementations, the total length of a domain name (i.e., | |
49 | * label octets and label length octets) is restricted to 255 octets or | |
50 | * less. | |
51 | *\par | |
52 | * Clarified by RFC 2181 Section 11. (RFC2181_MAXHOSTNAMELEN) | |
53 | */ | |
54 | #define RFC1035_MAXHOSTNAMESZ RFC2181_MAXHOSTNAMELEN | |
55 | ||
e210930b | 56 | #define RFC1035_DEFAULT_PACKET_SZ 512 |
e1f7507e | 57 | |
7b724b86 | 58 | typedef struct _rfc1035_rr rfc1035_rr; |
59 | struct _rfc1035_rr { | |
60 | char name[RFC1035_MAXHOSTNAMESZ]; | |
61 | unsigned short type; | |
29b8d8d6 | 62 | unsigned short _class; |
7b724b86 | 63 | unsigned int ttl; |
64 | unsigned short rdlength; | |
65 | char *rdata; | |
66 | }; | |
e1f7507e | 67 | |
ec7bade0 | 68 | typedef struct _rfc1035_query rfc1035_query; |
69 | struct _rfc1035_query { | |
70 | char name[RFC1035_MAXHOSTNAMESZ]; | |
71 | unsigned short qtype; | |
72 | unsigned short qclass; | |
73 | }; | |
e1f7507e | 74 | |
ec7bade0 | 75 | typedef struct _rfc1035_message rfc1035_message; |
76 | struct _rfc1035_message { | |
77 | unsigned short id; | |
78 | unsigned int qr:1; | |
79 | unsigned int opcode:4; | |
80 | unsigned int aa:1; | |
81 | unsigned int tc:1; | |
82 | unsigned int rd:1; | |
83 | unsigned int ra:1; | |
84 | unsigned int rcode:4; | |
85 | unsigned short qdcount; | |
86 | unsigned short ancount; | |
87 | unsigned short nscount; | |
88 | unsigned short arcount; | |
89 | rfc1035_query *query; | |
90 | rfc1035_rr *answer; | |
91 | }; | |
92 | ||
108d67a0 | 93 | SQUIDCEXTERN ssize_t rfc1035BuildAQuery(const char *hostname, |
c5dd4956 AJ |
94 | char *buf, |
95 | size_t sz, | |
96 | unsigned short qid, | |
e210930b AJ |
97 | rfc1035_query * query, |
98 | ssize_t edns_sz); | |
7b6b4a98 | 99 | SQUIDCEXTERN ssize_t rfc1035BuildPTRQuery(const struct in_addr, |
c5dd4956 AJ |
100 | char *buf, |
101 | size_t sz, | |
102 | unsigned short qid, | |
e210930b | 103 | rfc1035_query * query, |
24520b1b | 104 | ssize_t edns_sz); |
108d67a0 | 105 | SQUIDCEXTERN void rfc1035SetQueryID(char *, unsigned short qid); |
ec7bade0 | 106 | SQUIDCEXTERN int rfc1035MessageUnpack(const char *buf, |
c5dd4956 AJ |
107 | size_t sz, |
108 | rfc1035_message ** answer); | |
9e1f210d | 109 | SQUIDCEXTERN int rfc1035QueryCompare(const rfc1035_query *, const rfc1035_query *); |
bae9832d | 110 | SQUIDCEXTERN void rfc1035RRDestroy(rfc1035_rr ** rr, int n); |
cc192b50 | 111 | SQUIDCEXTERN void rfc1035MessageDestroy(rfc1035_message ** message); |
42687bb2 | 112 | SQUIDCEXTERN const char * rfc1035ErrorMessage(int n); |
7b724b86 | 113 | |
114 | #define RFC1035_TYPE_A 1 | |
2d320a3a | 115 | #define RFC1035_TYPE_CNAME 5 |
34a46fef | 116 | #define RFC1035_TYPE_PTR 12 |
7b724b86 | 117 | #define RFC1035_CLASS_IN 1 |
118 | ||
c5dd4956 | 119 | /* Child Library RFC3596 Depends on some otherwise internal functions */ |
7b6b4a98 | 120 | SQUIDCEXTERN int rfc1035HeaderPack(char *buf, |
c5dd4956 AJ |
121 | size_t sz, |
122 | rfc1035_message * hdr); | |
7b6b4a98 | 123 | SQUIDCEXTERN int rfc1035HeaderUnpack(const char *buf, |
c5dd4956 AJ |
124 | size_t sz, |
125 | unsigned int *off, | |
126 | rfc1035_message * h); | |
7b6b4a98 | 127 | SQUIDCEXTERN int rfc1035QuestionPack(char *buf, |
c5dd4956 AJ |
128 | size_t sz, |
129 | const char *name, | |
130 | const unsigned short type, | |
131 | const unsigned short _class); | |
e210930b | 132 | SQUIDCEXTERN int rfc1035RRPack(char *buf, size_t sz, const rfc1035_rr * RR); |
7b6b4a98 | 133 | |
b5638623 | 134 | #endif /* SQUID_RFC1035_H */ |