1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* $Id$ */
/* Copyright 1998 by the Massachusetts Institute of Technology.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#ifndef ARES__H
#define ARES__H
#include <sys/types.h>
#ifdef _AIX
/* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
libc5-based Linux systems. Only include it on system that are known to
require it! */
#include <sys/select.h>
#endif
#ifdef WIN32
#include <winsock.h>
#include <windows.h>
#else
#include <netinet/in.h>
#endif
#define ARES_SUCCESS 0
/* Server error codes (ARES_ENODATA indicates no relevant answer) */
#define ARES_ENODATA 1
#define ARES_EFORMERR 2
#define ARES_ESERVFAIL 3
#define ARES_ENOTFOUND 4
#define ARES_ENOTIMP 5
#define ARES_EREFUSED 6
/* Locally generated error codes */
#define ARES_EBADQUERY 7
#define ARES_EBADNAME 8
#define ARES_EBADFAMILY 9
#define ARES_EBADRESP 10
#define ARES_ECONNREFUSED 11
#define ARES_ETIMEOUT 12
#define ARES_EOF 13
#define ARES_EFILE 14
#define ARES_ENOMEM 15
#define ARES_EDESTRUCTION 16
#define ARES_EBADSTR 17
/* Flag values */
#define ARES_FLAG_USEVC (1 << 0)
#define ARES_FLAG_PRIMARY (1 << 1)
#define ARES_FLAG_IGNTC (1 << 2)
#define ARES_FLAG_NORECURSE (1 << 3)
#define ARES_FLAG_STAYOPEN (1 << 4)
#define ARES_FLAG_NOSEARCH (1 << 5)
#define ARES_FLAG_NOALIASES (1 << 6)
#define ARES_FLAG_NOCHECKRESP (1 << 7)
/* Option mask values */
#define ARES_OPT_FLAGS (1 << 0)
#define ARES_OPT_TIMEOUT (1 << 1)
#define ARES_OPT_TRIES (1 << 2)
#define ARES_OPT_NDOTS (1 << 3)
#define ARES_OPT_UDP_PORT (1 << 4)
#define ARES_OPT_TCP_PORT (1 << 5)
#define ARES_OPT_SERVERS (1 << 6)
#define ARES_OPT_DOMAINS (1 << 7)
#define ARES_OPT_LOOKUPS (1 << 8)
struct ares_options {
int flags;
int timeout;
int tries;
int ndots;
unsigned short udp_port;
unsigned short tcp_port;
struct in_addr *servers;
int nservers;
char **domains;
int ndomains;
char *lookups;
};
struct hostent;
struct timeval;
struct ares_channeldata;
typedef struct ares_channeldata *ares_channel;
typedef void (*ares_callback)(void *arg, int status, unsigned char *abuf,
int alen);
typedef void (*ares_host_callback)(void *arg, int status,
struct hostent *hostent);
int ares_init(ares_channel *channelptr);
int ares_init_options(ares_channel *channelptr, struct ares_options *options,
int optmask);
void ares_destroy(ares_channel channel);
void ares_send(ares_channel channel, const unsigned char *qbuf, int qlen,
ares_callback callback, void *arg);
void ares_query(ares_channel channel, const char *name, int dnsclass,
int type, ares_callback callback, void *arg);
void ares_search(ares_channel channel, const char *name, int dnsclass,
int type, ares_callback callback, void *arg);
void ares_gethostbyname(ares_channel channel, const char *name, int family,
ares_host_callback callback, void *arg);
void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
int family, ares_host_callback callback, void *arg);
int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv,
struct timeval *tv);
void ares_process(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
int ares_mkquery(const char *name, int dnsclass, int type, unsigned short id,
int rd, unsigned char **buf, int *buflen);
int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf,
int alen, char **s, long *enclen);
int ares_expand_string(const unsigned char *encoded, const unsigned char *abuf,
int alen, unsigned char **s, long *enclen);
int ares_parse_a_reply(const unsigned char *abuf, int alen,
struct hostent **host);
int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr,
int addrlen, int family, struct hostent **host);
void ares_free_string(void *str);
void ares_free_hostent(struct hostent *host);
const char *ares_strerror(int code);
void ares_free_errmem(char *mem);
#endif /* ARES__H */
|
