1 /* dnsmasq is Copyright (c) 2000-2012 Simon Kelley
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; version 2 dated June, 1991, or
6 (at your option) version 3 dated 29 June, 2007.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #define NAMESERVER_PORT 53
23 #define PACKETSZ 512 /* maximum packet size */
24 #define MAXDNAME 1025 /* maximum presentation domain name */
25 #define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */
26 #define MAXLABEL 63 /* maximum length of domain label */
28 #define NOERROR 0 /* no error */
29 #define FORMERR 1 /* format error */
30 #define SERVFAIL 2 /* server failure */
31 #define NXDOMAIN 3 /* non existent domain */
32 #define NOTIMP 4 /* not implemented */
33 #define REFUSED 5 /* query refused */
35 #define QUERY 0 /* opcode */
37 #define C_IN 1 /* the arpa internet */
38 #define C_CHAOS 3 /* for chaos net (MIT) */
39 #define C_ANY 255 /* wildcard match */
61 u16 qdcount
,ancount
,nscount
,arcount
;
65 #define HB3_OPCODE 0x78
73 #define HB4_RCODE 0x0f
75 #define OPCODE(x) (((x)->hb3 & HB3_OPCODE) >> 3)
76 #define RCODE(x) ((x)->hb4 & HB4_RCODE)
77 #define SET_RCODE(x, code) (x)->hb4 = ((x)->hb4 & ~HB4_RCODE) | code
79 #define GETSHORT(s, cp) { \
80 unsigned char *t_cp = (unsigned char *)(cp); \
81 (s) = ((u16)t_cp[0] << 8) \
87 #define GETLONG(l, cp) { \
88 unsigned char *t_cp = (unsigned char *)(cp); \
89 (l) = ((u32)t_cp[0] << 24) \
90 | ((u32)t_cp[1] << 16) \
91 | ((u32)t_cp[2] << 8) \
97 #define PUTSHORT(s, cp) { \
99 unsigned char *t_cp = (unsigned char *)(cp); \
100 *t_cp++ = t_s >> 8; \
105 #define PUTLONG(l, cp) { \
106 u32 t_l = (u32)(l); \
107 unsigned char *t_cp = (unsigned char *)(cp); \
108 *t_cp++ = t_l >> 24; \
109 *t_cp++ = t_l >> 16; \
110 *t_cp++ = t_l >> 8; \