2 * Copyright (c) 1995-1999 by Internet Software Consortium.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
18 #include <sys/types.h>
19 #include <sys/param.h>
20 #include <sys/socket.h>
23 #include <netinet/in.h>
24 #include <arpa/inet.h>
25 #include <arpa/nameser.h>
35 const char *_res_opcodes
[] = {
39 "CQUERYU", /* experimental */
40 "NOTIFY", /* experimental */
53 libresolv_hidden_data_def (_res_opcodes
)
56 p_query(const u_char
*msg
) {
57 fp_query(msg
, stdout
);
61 fp_query(const u_char
*msg
, FILE *file
) {
62 fp_nquery(msg
, PACKETSZ
, file
);
64 libresolv_hidden_def (fp_query
)
67 fp_nquery(const u_char
*msg
, int len
, FILE *file
) {
68 if (__res_maybe_init (&_res
, 0) == -1)
71 res_pquery(&_res
, msg
, len
, file
);
73 libresolv_hidden_def (fp_nquery
)
76 res_mkquery(int op
, /* opcode of query */
77 const char *dname
, /* domain name */
78 int class, int type
, /* class and type of query */
79 const u_char
*data
, /* resource record data */
80 int datalen
, /* length of data */
81 const u_char
*newrr_in
, /* new rr for modify or append */
82 u_char
*buf
, /* buffer to put query */
83 int buflen
) /* size of buffer */
85 if (__res_maybe_init (&_res
, 1) == -1) {
86 RES_SET_H_ERRNO(&_res
, NETDB_INTERNAL
);
89 return (res_nmkquery(&_res
, op
, dname
, class, type
,
91 newrr_in
, buf
, buflen
));
95 res_query(const char *name
, /* domain name */
96 int class, int type
, /* class and type of query */
97 u_char
*answer
, /* buffer to put answer */
98 int anslen
) /* size of answer buffer */
100 if (__res_maybe_init (&_res
, 1) == -1) {
101 RES_SET_H_ERRNO(&_res
, NETDB_INTERNAL
);
104 return (res_nquery(&_res
, name
, class, type
, answer
, anslen
));
108 res_send_setqhook(res_send_qhook hook
) {
113 res_send_setrhook(res_send_rhook hook
) {
118 res_isourserver(const struct sockaddr_in
*inp
) {
119 return (res_ourserver_p(&_res
, (const struct sockaddr_in6
*) inp
));
123 res_send(const u_char
*buf
, int buflen
, u_char
*ans
, int anssiz
) {
124 if (__res_maybe_init (&_res
, 1) == -1) {
125 /* errno should have been set by res_init() in this case. */
129 return (res_nsend(&_res
, buf
, buflen
, ans
, anssiz
));
136 * Some stupid programs out there call res_close() before res_init().
137 * Since _res._vcsock isn't explicitly initialized, these means that
138 * we could do a close(0), which might lead to some security problems.
139 * Therefore we check if res_init() was called before by looking at
140 * the RES_INIT bit in _res.options. If it hasn't been set we bail out
142 if ((_res
.options
& RES_INIT
) == 0)
144 /* We don't free the name server addresses because we never
145 did it and it would be done implicitly on shutdown. */
146 __res_iclose(&_res
, false);
150 res_search(const char *name
, /* domain name */
151 int class, int type
, /* class and type of query */
152 u_char
*answer
, /* buffer to put answer */
153 int anslen
) /* size of answer */
155 if (__res_maybe_init (&_res
, 1) == -1) {
156 RES_SET_H_ERRNO(&_res
, NETDB_INTERNAL
);
160 return (res_nsearch(&_res
, name
, class, type
, answer
, anslen
));
164 res_querydomain(const char *name
,
166 int class, int type
, /* class and type of query */
167 u_char
*answer
, /* buffer to put answer */
168 int anslen
) /* size of answer */
170 if (__res_maybe_init (&_res
, 1) == -1) {
171 RES_SET_H_ERRNO(&_res
, NETDB_INTERNAL
);
175 return (res_nquerydomain(&_res
, name
, domain
,
181 hostalias(const char *name
) {
182 static char abuf
[MAXDNAME
];
184 return (res_hostalias(&_res
, name
, abuf
, sizeof abuf
));
186 libresolv_hidden_def (hostalias
)
190 #include <shlib-compat.h>
192 #if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2)
195 # undef res_querydomain
197 weak_alias (__res_mkquery
, res_mkquery
);
198 weak_alias (__res_query
, res_query
);
199 weak_alias (__res_querydomain
, res_querydomain
);
200 weak_alias (__res_search
, res_search
);