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.
21 #include <sys/types.h>
23 #if defined(_AIX) || (defined(NETWARE) && defined(__NOVELL_LIBC__))
24 /* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
25 libc5-based Linux systems. Only include it on system that are known to
27 #include <sys/select.h>
29 #if (defined(NETWARE) && !defined(__NOVELL_LIBC__))
30 #include <sys/bsdskt.h>
34 #include <netinet/in.h>
35 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <sys/socket.h>
49 #define ARES_SUCCESS 0
51 /* Server error codes (ARES_ENODATA indicates no relevant answer) */
52 #define ARES_ENODATA 1
53 #define ARES_EFORMERR 2
54 #define ARES_ESERVFAIL 3
55 #define ARES_ENOTFOUND 4
56 #define ARES_ENOTIMP 5
57 #define ARES_EREFUSED 6
59 /* Locally generated error codes */
60 #define ARES_EBADQUERY 7
61 #define ARES_EBADNAME 8
62 #define ARES_EBADFAMILY 9
63 #define ARES_EBADRESP 10
64 #define ARES_ECONNREFUSED 11
65 #define ARES_ETIMEOUT 12
68 #define ARES_ENOMEM 15
69 #define ARES_EDESTRUCTION 16
70 #define ARES_EBADSTR 17
72 /* ares_getnameinfo error codes */
73 #define ARES_EBADFLAGS 18
75 /* ares_getaddrinfo error codes */
76 #define ARES_ENONAME 19
77 #define ARES_EBADHINTS 20
80 #define ARES_FLAG_USEVC (1 << 0)
81 #define ARES_FLAG_PRIMARY (1 << 1)
82 #define ARES_FLAG_IGNTC (1 << 2)
83 #define ARES_FLAG_NORECURSE (1 << 3)
84 #define ARES_FLAG_STAYOPEN (1 << 4)
85 #define ARES_FLAG_NOSEARCH (1 << 5)
86 #define ARES_FLAG_NOALIASES (1 << 6)
87 #define ARES_FLAG_NOCHECKRESP (1 << 7)
89 /* Option mask values */
90 #define ARES_OPT_FLAGS (1 << 0)
91 #define ARES_OPT_TIMEOUT (1 << 1)
92 #define ARES_OPT_TRIES (1 << 2)
93 #define ARES_OPT_NDOTS (1 << 3)
94 #define ARES_OPT_UDP_PORT (1 << 4)
95 #define ARES_OPT_TCP_PORT (1 << 5)
96 #define ARES_OPT_SERVERS (1 << 6)
97 #define ARES_OPT_DOMAINS (1 << 7)
98 #define ARES_OPT_LOOKUPS (1 << 8)
99 #define ARES_OPT_SOCK_STATE_CB (1 << 9)
100 #define ARES_OPT_SORTLIST (1 << 10)
101 #define ARES_OPT_SOCK_SNDBUF (1 << 11)
102 #define ARES_OPT_SOCK_RCVBUF (1 << 12)
104 /* Nameinfo flag values */
105 #define ARES_NI_NOFQDN (1 << 0)
106 #define ARES_NI_NUMERICHOST (1 << 1)
107 #define ARES_NI_NAMEREQD (1 << 2)
108 #define ARES_NI_NUMERICSERV (1 << 3)
109 #define ARES_NI_DGRAM (1 << 4)
110 #define ARES_NI_TCP 0
111 #define ARES_NI_UDP ARES_NI_DGRAM
112 #define ARES_NI_SCTP (1 << 5)
113 #define ARES_NI_DCCP (1 << 6)
114 #define ARES_NI_NUMERICSCOPE (1 << 7)
115 #define ARES_NI_LOOKUPHOST (1 << 8)
116 #define ARES_NI_LOOKUPSERVICE (1 << 9)
117 /* Reserved for future use */
118 #define ARES_NI_IDN (1 << 10)
119 #define ARES_NI_IDN_ALLOW_UNASSIGNED (1 << 11)
120 #define ARES_NI_IDN_USE_STD3_ASCII_RULES (1 << 12)
122 /* Addrinfo flag values */
123 #define ARES_AI_CANONNAME (1 << 0)
124 #define ARES_AI_NUMERICHOST (1 << 1)
125 #define ARES_AI_PASSIVE (1 << 2)
126 #define ARES_AI_NUMERICSERV (1 << 3)
127 #define ARES_AI_V4MAPPED (1 << 4)
128 #define ARES_AI_ALL (1 << 5)
129 #define ARES_AI_ADDRCONFIG (1 << 6)
130 /* Reserved for future use */
131 #define ARES_AI_IDN (1 << 10)
132 #define ARES_AI_IDN_ALLOW_UNASSIGNED (1 << 11)
133 #define ARES_AI_IDN_USE_STD3_ASCII_RULES (1 << 12)
134 #define ARES_AI_CANONIDN (1 << 13)
136 #define ARES_AI_MASK (ARES_AI_CANONNAME|ARES_AI_NUMERICHOST|ARES_AI_PASSIVE| \
137 ARES_AI_NUMERICSERV|ARES_AI_V4MAPPED|ARES_AI_ALL| \
139 #define ARES_GETSOCK_MAXNUM 16 /* ares_getsock() can return info about this
141 #define ARES_GETSOCK_READABLE(bits,num) (bits & (1<< (num)))
142 #define ARES_GETSOCK_WRITABLE(bits,num) (bits & (1 << ((num) + \
143 ARES_GETSOCK_MAXNUM)))
147 * Typedef our socket type
150 #ifndef ares_socket_typedef
152 typedef SOCKET ares_socket_t;
153 #define ARES_SOCKET_BAD INVALID_SOCKET
155 typedef int ares_socket_t;
156 #define ARES_SOCKET_BAD -1
158 #define ares_socket_typedef
159 #endif /* ares_socket_typedef */
162 typedef void (*ares_sock_state_cb)(void *data,
167 typedef void (*ares_sock_state_cb)(void *data,
175 struct ares_options {
180 unsigned short udp_port;
181 unsigned short tcp_port;
182 int socket_send_buffer_size;
183 int socket_receive_buffer_size;
184 struct in_addr *servers;
189 ares_sock_state_cb sock_state_cb;
190 void *sock_state_cb_data;
191 struct apattern *sortlist;
198 struct ares_channeldata;
199 typedef struct ares_channeldata *ares_channel;
200 typedef void (*ares_callback)(void *arg, int status, int timeouts,
201 unsigned char *abuf, int alen);
202 typedef void (*ares_host_callback)(void *arg, int status, int timeouts,
203 struct hostent *hostent);
204 typedef void (*ares_nameinfo_callback)(void *arg, int status, int timeouts,
205 char *node, char *service);
207 int ares_init(ares_channel *channelptr);
208 int ares_init_options(ares_channel *channelptr, struct ares_options *options,
210 int ares_save_options(ares_channel channel, struct ares_options *options, int *optmask);
211 void ares_destroy_options(struct ares_options *options);
212 void ares_destroy(ares_channel channel);
213 void ares_cancel(ares_channel channel);
214 void ares_send(ares_channel channel, const unsigned char *qbuf, int qlen,
215 ares_callback callback, void *arg);
216 void ares_query(ares_channel channel, const char *name, int dnsclass,
217 int type, ares_callback callback, void *arg);
218 void ares_search(ares_channel channel, const char *name, int dnsclass,
219 int type, ares_callback callback, void *arg);
220 void ares_gethostbyname(ares_channel channel, const char *name, int family,
221 ares_host_callback callback, void *arg);
222 void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
223 int family, ares_host_callback callback, void *arg);
224 void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa,
225 socklen_t salen, int flags,
226 ares_nameinfo_callback callback,
228 int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
229 int ares_getsock(ares_channel channel, int *socks, int numsocks);
230 struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv,
232 void ares_process(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
233 void ares_process_fd(ares_channel channel, ares_socket_t read_fd,
234 ares_socket_t write_fd);
236 int ares_mkquery(const char *name, int dnsclass, int type, unsigned short id,
237 int rd, unsigned char **buf, int *buflen);
238 int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf,
239 int alen, char **s, long *enclen);
240 int ares_expand_string(const unsigned char *encoded, const unsigned char *abuf,
241 int alen, unsigned char **s, long *enclen);
242 int ares_parse_a_reply(const unsigned char *abuf, int alen,
243 struct hostent **host);
244 int ares_parse_aaaa_reply(const unsigned char *abuf, int alen,
245 struct hostent **host);
246 int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr,
247 int addrlen, int family, struct hostent **host);
248 int ares_parse_ns_reply(const unsigned char *abuf, int alen,
249 struct hostent **host);
250 void ares_free_string(void *str);
251 void ares_free_hostent(struct hostent *host);
252 const char *ares_strerror(int code);