1#pragma once
2
3#include <arpa/nameser.h>
4#include <netinet/in.h>
5#include <stdint.h>
6
7#ifdef __cplusplus
8extern "C" {
9#endif
10
11#define MAXNS 3
12#define MAXDFLSRCH 3
13#define MAXDNSRCH 6
14#define LOCALDOMAINPARTS 2
15
16#define RES_TIMEOUT 5
17#define MAXRESOLVSORT 10
18#define RES_MAXNDOTS 15
19#define RES_MAXRETRANS 30
20#define RES_MAXRETRY 5
21#define RES_DFLRETRY 2
22#define RES_MAXTIME 65535
23
24/* unused; purely for broken apps */
25typedef struct __res_state {
26    int retrans;
27    int retry;
28    unsigned long options;
29    int nscount;
30    struct sockaddr_in nsaddr_list[MAXNS];
31#define nsaddr nsaddr_list[0]
32    unsigned short id;
33    char* dnsrch[MAXDNSRCH + 1];
34    char defdname[256];
35    unsigned long pfcode;
36    unsigned ndots : 4;
37    unsigned nsort : 4;
38    unsigned ipv6_unavail : 1;
39    unsigned unused : 23;
40    struct {
41        struct in_addr addr;
42        uint32_t mask;
43    } sort_list[MAXRESOLVSORT];
44    void* qhook;
45    void* rhook;
46    int res_h_errno;
47    int _vcsock;
48    unsigned _flags;
49    union {
50        char pad[52];
51        struct {
52            uint16_t nscount;
53            uint16_t nsmap[MAXNS];
54            int nssocks[MAXNS];
55            uint16_t nscount6;
56            uint16_t nsinit;
57            struct sockaddr_in6* nsaddrs[MAXNS];
58            unsigned int _initstamp[2];
59        } _ext;
60    } _u;
61} * res_state;
62
63#define __RES 19991006
64
65#ifndef _PATH_RESCONF
66#define _PATH_RESCONF "/etc/resolv.conf"
67#endif
68
69struct res_sym {
70    int number;
71    char* name;
72    char* humanname;
73};
74
75#define RES_F_VC 0x00000001
76#define RES_F_CONN 0x00000002
77#define RES_F_EDNS0ERR 0x00000004
78
79#define RES_EXHAUSTIVE 0x00000001
80
81#define RES_INIT 0x00000001
82#define RES_DEBUG 0x00000002
83#define RES_AAONLY 0x00000004
84#define RES_USEVC 0x00000008
85#define RES_PRIMARY 0x00000010
86#define RES_IGNTC 0x00000020
87#define RES_RECURSE 0x00000040
88#define RES_DEFNAMES 0x00000080
89#define RES_STAYOPEN 0x00000100
90#define RES_DNSRCH 0x00000200
91#define RES_INSECURE1 0x00000400
92#define RES_INSECURE2 0x00000800
93#define RES_NOALIASES 0x00001000
94#define RES_USE_INET6 0x00002000
95#define RES_ROTATE 0x00004000
96#define RES_NOCHECKNAME 0x00008000
97#define RES_KEEPTSIG 0x00010000
98#define RES_BLAST 0x00020000
99#define RES_USEBSTRING 0x00040000
100#define RES_NOIP6DOTINT 0x00080000
101#define RES_USE_EDNS0 0x00100000
102#define RES_SNGLKUP 0x00200000
103#define RES_SNGLKUPREOP 0x00400000
104#define RES_USE_DNSSEC 0x00800000
105
106#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH | RES_NOIP6DOTINT)
107
108#define RES_PRF_STATS 0x00000001
109#define RES_PRF_UPDATE 0x00000002
110#define RES_PRF_CLASS 0x00000004
111#define RES_PRF_CMD 0x00000008
112#define RES_PRF_QUES 0x00000010
113#define RES_PRF_ANS 0x00000020
114#define RES_PRF_AUTH 0x00000040
115#define RES_PRF_ADD 0x00000080
116#define RES_PRF_HEAD1 0x00000100
117#define RES_PRF_HEAD2 0x00000200
118#define RES_PRF_TTLID 0x00000400
119#define RES_PRF_HEADX 0x00000800
120#define RES_PRF_QUERY 0x00001000
121#define RES_PRF_REPLY 0x00002000
122#define RES_PRF_INIT 0x00004000
123
124struct __res_state* __res_state(void);
125#define _res (*__res_state())
126
127int res_init(void);
128int res_query(const char*, int, int, unsigned char*, int);
129int res_querydomain(const char*, const char*, int, int, unsigned char*, int);
130int res_search(const char*, int, int, unsigned char*, int);
131int res_mkquery(int, const char*, int, int, const unsigned char*, int, const unsigned char*,
132                unsigned char*, int);
133int res_send(const unsigned char*, int, unsigned char*, int);
134int dn_comp(const char*, unsigned char*, int, unsigned char**, unsigned char**);
135int dn_expand(const unsigned char*, const unsigned char*, const unsigned char*, char*, int);
136int dn_skipname(const unsigned char*, const unsigned char*);
137
138#ifdef __cplusplus
139}
140#endif
141