3 /* Copyright 1998 by the Massachusetts Institute of Technology.
5 * Permission to use, copy, modify, and distribute this
6 * software and its documentation for any purpose and without
7 * fee is hereby granted, provided that the above copyright
8 * notice appear in all copies and that both that copyright
9 * notice and this permission notice appear in supporting
10 * documentation, and that the name of M.I.T. not be used in
11 * advertising or publicity pertaining to distribution of the
12 * software without specific, written prior permission.
13 * M.I.T. makes no representations about the suitability of
14 * this software for any purpose. It is provided "as is"
15 * without express or implied warranty.
22 * Define WIN32 when build target is Win32 API
25 #if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
29 #include <sys/types.h>
31 #if defined(_AIX) || (defined(NETWARE) && defined(__NOVELL_LIBC__))
32 /* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
33 libc5-based Linux systems. Only include it on system that are known to
35 #include <sys/select.h>
37 #if (defined(NETWARE) && !defined(__NOVELL_LIBC__))
38 #include <sys/bsdskt.h>
42 #include <netinet/in.h>
43 #include <sys/socket.h>
46 # ifndef WIN32_LEAN_AND_MEAN
47 # define WIN32_LEAN_AND_MEAN
50 # include <winsock2.h>
51 # include <ws2tcpip.h>
53 #include <netinet/in.h>
54 #include <sys/socket.h>
61 #define ARES_SUCCESS 0
63 /* Server error codes (ARES_ENODATA indicates no relevant answer) */
64 #define ARES_ENODATA 1
65 #define ARES_EFORMERR 2
66 #define ARES_ESERVFAIL 3
67 #define ARES_ENOTFOUND 4
68 #define ARES_ENOTIMP 5
69 #define ARES_EREFUSED 6
71 /* Locally generated error codes */
72 #define ARES_EBADQUERY 7
73 #define ARES_EBADNAME 8
74 #define ARES_EBADFAMILY 9
75 #define ARES_EBADRESP 10
76 #define ARES_ECONNREFUSED 11
77 #define ARES_ETIMEOUT 12
80 #define ARES_ENOMEM 15
81 #define ARES_EDESTRUCTION 16
82 #define ARES_EBADSTR 17
84 /* ares_getnameinfo error codes */
85 #define ARES_EBADFLAGS 18
87 /* ares_getaddrinfo error codes */
88 #define ARES_ENONAME 19
89 #define ARES_EBADHINTS 20
92 #define ARES_FLAG_USEVC (1 << 0)
93 #define ARES_FLAG_PRIMARY (1 << 1)
94 #define ARES_FLAG_IGNTC (1 << 2)
95 #define ARES_FLAG_NORECURSE (1 << 3)
96 #define ARES_FLAG_STAYOPEN (1 << 4)
97 #define ARES_FLAG_NOSEARCH (1 << 5)
98 #define ARES_FLAG_NOALIASES (1 << 6)
99 #define ARES_FLAG_NOCHECKRESP (1 << 7)
101 /* Option mask values */
102 #define ARES_OPT_FLAGS (1 << 0)
103 #define ARES_OPT_TIMEOUT (1 << 1)
104 #define ARES_OPT_TRIES (1 << 2)
105 #define ARES_OPT_NDOTS (1 << 3)
106 #define ARES_OPT_UDP_PORT (1 << 4)
107 #define ARES_OPT_TCP_PORT (1 << 5)
108 #define ARES_OPT_SERVERS (1 << 6)
109 #define ARES_OPT_DOMAINS (1 << 7)
110 #define ARES_OPT_LOOKUPS (1 << 8)
111 #define ARES_OPT_SOCK_STATE_CB (1 << 9)
112 #define ARES_OPT_SORTLIST (1 << 10)
113 #define ARES_OPT_SOCK_SNDBUF (1 << 11)
114 #define ARES_OPT_SOCK_RCVBUF (1 << 12)
116 /* Nameinfo flag values */
117 #define ARES_NI_NOFQDN (1 << 0)
118 #define ARES_NI_NUMERICHOST (1 << 1)
119 #define ARES_NI_NAMEREQD (1 << 2)
120 #define ARES_NI_NUMERICSERV (1 << 3)
121 #define ARES_NI_DGRAM (1 << 4)
122 #define ARES_NI_TCP 0
123 #define ARES_NI_UDP ARES_NI_DGRAM
124 #define ARES_NI_SCTP (1 << 5)
125 #define ARES_NI_DCCP (1 << 6)
126 #define ARES_NI_NUMERICSCOPE (1 << 7)
127 #define ARES_NI_LOOKUPHOST (1 << 8)
128 #define ARES_NI_LOOKUPSERVICE (1 << 9)
129 /* Reserved for future use */
130 #define ARES_NI_IDN (1 << 10)
131 #define ARES_NI_IDN_ALLOW_UNASSIGNED (1 << 11)
132 #define ARES_NI_IDN_USE_STD3_ASCII_RULES (1 << 12)
134 /* Addrinfo flag values */
135 #define ARES_AI_CANONNAME (1 << 0)
136 #define ARES_AI_NUMERICHOST (1 << 1)
137 #define ARES_AI_PASSIVE (1 << 2)
138 #define ARES_AI_NUMERICSERV (1 << 3)
139 #define ARES_AI_V4MAPPED (1 << 4)
140 #define ARES_AI_ALL (1 << 5)
141 #define ARES_AI_ADDRCONFIG (1 << 6)
142 /* Reserved for future use */
143 #define ARES_AI_IDN (1 << 10)
144 #define ARES_AI_IDN_ALLOW_UNASSIGNED (1 << 11)
145 #define ARES_AI_IDN_USE_STD3_ASCII_RULES (1 << 12)
146 #define ARES_AI_CANONIDN (1 << 13)
148 #define ARES_AI_MASK (ARES_AI_CANONNAME|ARES_AI_NUMERICHOST|ARES_AI_PASSIVE| \
149 ARES_AI_NUMERICSERV|ARES_AI_V4MAPPED|ARES_AI_ALL| \
151 #define ARES_GETSOCK_MAXNUM 16 /* ares_getsock() can return info about this
153 #define ARES_GETSOCK_READABLE(bits,num) (bits & (1<< (num)))
154 #define ARES_GETSOCK_WRITABLE(bits,num) (bits & (1 << ((num) + \
155 ARES_GETSOCK_MAXNUM)))
159 * Typedef our socket type
162 #ifndef ares_socket_typedef
164 typedef SOCKET ares_socket_t;
165 #define ARES_SOCKET_BAD INVALID_SOCKET
167 typedef int ares_socket_t;
168 #define ARES_SOCKET_BAD -1
170 #define ares_socket_typedef
171 #endif /* ares_socket_typedef */
173 typedef void (*ares_sock_state_cb)(void *data,
174 ares_socket_t socket_fd,
180 struct ares_options {
185 unsigned short udp_port;
186 unsigned short tcp_port;
187 int socket_send_buffer_size;
188 int socket_receive_buffer_size;
189 struct in_addr *servers;
194 ares_sock_state_cb sock_state_cb;
195 void *sock_state_cb_data;
196 struct apattern *sortlist;
203 struct ares_channeldata;
204 typedef struct ares_channeldata *ares_channel;
205 typedef void (*ares_callback)(void *arg, int status, int timeouts,
206 unsigned char *abuf, int alen);
207 typedef void (*ares_host_callback)(void *arg, int status, int timeouts,
208 struct hostent *hostent);
209 typedef void (*ares_nameinfo_callback)(void *arg, int status, int timeouts,
210 char *node, char *service);
212 int ares_init(ares_channel *channelptr);
213 int ares_init_options(ares_channel *channelptr, struct ares_options *options,
215 int ares_save_options(ares_channel channel, struct ares_options *options, int *optmask);
216 void ares_destroy_options(struct ares_options *options);
217 void ares_destroy(ares_channel channel);
218 void ares_cancel(ares_channel channel);
219 void ares_send(ares_channel channel, const unsigned char *qbuf, int qlen,
220 ares_callback callback, void *arg);
221 void ares_query(ares_channel channel, const char *name, int dnsclass,
222 int type, ares_callback callback, void *arg);
223 void ares_search(ares_channel channel, const char *name, int dnsclass,
224 int type, ares_callback callback, void *arg);
225 void ares_gethostbyname(ares_channel channel, const char *name, int family,
226 ares_host_callback callback, void *arg);
227 void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
228 int family, ares_host_callback callback, void *arg);
229 void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa,
230 socklen_t salen, int flags,
231 ares_nameinfo_callback callback,
233 int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
234 int ares_getsock(ares_channel channel, int *socks, int numsocks);
235 struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv,
237 void ares_process(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
238 void ares_process_fd(ares_channel channel, ares_socket_t read_fd,
239 ares_socket_t write_fd);
241 int ares_mkquery(const char *name, int dnsclass, int type, unsigned short id,
242 int rd, unsigned char **buf, int *buflen);
243 int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf,
244 int alen, char **s, long *enclen);
245 int ares_expand_string(const unsigned char *encoded, const unsigned char *abuf,
246 int alen, unsigned char **s, long *enclen);
248 #if !defined(HAVE_STRUCT_IN6_ADDR) && !defined(s6_addr)
251 unsigned char _S6_u8[16];
254 #define s6_addr _S6_un._S6_u8
258 struct in_addr ipaddr;
262 struct in6_addr ip6addr;
267 ** Parse the buffer, starting at *abuf and of length alen bytes, previously
268 ** obtained from an ares_search call. Put the results in *host, if nonnull.
269 ** Also, if addrttls is nonnull, put up to *naddrttls IPv4 addresses along with
270 ** their TTLs in that array, and set *naddrttls to the number of addresses
273 int ares_parse_a_reply(const unsigned char *abuf, int alen,
274 struct hostent **host,
275 struct addrttl *addrttls, int *naddrttls);
276 int ares_parse_aaaa_reply(const unsigned char *abuf, int alen,
277 struct hostent **host,
278 struct addr6ttl *addrttls, int *naddrttls);
279 int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr,
280 int addrlen, int family, struct hostent **host);
281 int ares_parse_ns_reply(const unsigned char *abuf, int alen,
282 struct hostent **host);
283 void ares_free_string(void *str);
284 void ares_free_hostent(struct hostent *host);
285 const char *ares_strerror(int code);