3 * - useful general-purpose resolver client program
4 * make queries and print answers
7 * This file is part of adns, which is
8 * Copyright (C) 1997-2000,2003,2006 Ian Jackson
9 * Copyright (C) 1999-2000,2003,2006 Tony Finch
10 * Copyright (C) 1991 Massachusetts Institute of Technology
11 * (See the file INSTALL for full details.)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software Foundation,
25 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 struct outstanding_list outstanding
;
33 static unsigned long idcounter
;
35 void ensure_adns_init(void) {
36 adns_initflags initflags
;
41 if (signal(SIGPIPE
,SIG_IGN
) == SIG_ERR
) sysfail("ignore SIGPIPE",errno
);
43 initflags
= adns_if_noautosys
|adns_if_nosigpipe
|ov_verbose
;
44 if (!ov_env
) initflags
|= adns_if_noenv
;
47 r
= adns_init_strcfg(&ads
, initflags
, stderr
, config_text
);
49 r
= adns_init(&ads
, initflags
, 0);
51 if (r
) sysfail("adns_init",r
);
53 if (ov_format
== fmt_default
)
54 ov_format
= ov_asynch ? fmt_asynch
: fmt_simple
;
57 void type_info(adns_rrtype type
, const char **typename_r
,
58 const void *datap
, char **data_r
) {
62 st
= adns_rr_info(type
, typename_r
, 0,0, datap
,data_r
);
63 if (st
== adns_s_nomemory
) sysfail("adns_rr_info failed",ENOMEM
);
65 if (typename_r
&& !*typename_r
) {
66 sprintf(buf
,"TYPE%d", (int)(type
& adns_rrt_typemask
));
71 static void prep_query(struct query_node
**qun_r
, int *quflags_r
) {
72 struct query_node
*qun
;
75 if (ov_pipe
&& !ads
) usageerr("-f/--pipe not consistent with domains on command line");
78 qun
= malloc(sizeof(*qun
));
81 qun
->id
= xstrsave(ov_id
);
83 sprintf(idbuf
,"%lu",idcounter
++);
84 idcounter
&= 0x0fffffffflu
;
85 qun
->id
= xstrsave(idbuf
);
89 (ov_search ? adns_qf_search
: 0) |
90 (ov_tcp ? adns_qf_usevc
: 0) |
91 ((ov_pqfr
.show_owner
|| ov_format
== fmt_simple
) ? adns_qf_owner
: 0) |
92 (ov_qc_query ? adns_qf_quoteok_query
: 0) |
93 (ov_qc_anshost ? adns_qf_quoteok_anshost
: 0) |
94 (ov_qc_cname ?
0 : adns_qf_quoteok_cname
) |
100 void of_ptr(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
101 struct query_node
*qun
;
103 struct sockaddr_in sa
;
105 memset(&sa
,0,sizeof(sa
));
106 sa
.sin_family
= AF_INET
;
107 if (!inet_aton(arg
,&sa
.sin_addr
)) usageerr("invalid IP address %s",arg
);
109 prep_query(&qun
,&quflags
);
110 qun
->owner
= xstrsave(arg
);
111 r
= adns_submit_reverse(ads
,
112 (struct sockaddr
*)&sa
,
113 ov_type
== adns_r_none ? adns_r_ptr
: ov_type
,
117 if (r
) sysfail("adns_submit_reverse",r
);
119 LIST_LINK_TAIL(outstanding
,qun
);
122 void of_reverse(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
123 struct query_node
*qun
;
125 struct sockaddr_in sa
;
127 memset(&sa
,0,sizeof(sa
));
128 sa
.sin_family
= AF_INET
;
129 if (!inet_aton(arg
,&sa
.sin_addr
)) usageerr("invalid IP address %s",arg
);
131 prep_query(&qun
,&quflags
);
132 qun
->owner
= xmalloc(strlen(arg
) + strlen(arg2
) + 2);
133 sprintf(qun
->owner
, "%s %s", arg
,arg2
);
134 r
= adns_submit_reverse_any(ads
,
135 (struct sockaddr
*)&sa
, arg2
,
136 ov_type
== adns_r_none ? adns_r_txt
: ov_type
,
140 if (r
) sysfail("adns_submit_reverse",r
);
142 LIST_LINK_TAIL(outstanding
,qun
);
145 void query_do(const char *domain
) {
146 struct query_node
*qun
;
149 prep_query(&qun
,&quflags
);
150 qun
->owner
= xstrsave(domain
);
151 r
= adns_submit(ads
, domain
,
152 ov_type
== adns_r_none ? adns_r_addr
: ov_type
,
156 if (r
) sysfail("adns_submit",r
);
158 LIST_LINK_TAIL(outstanding
,qun
);
161 static void dequeue_query(struct query_node
*qun
) {
162 LIST_UNLINK(outstanding
,qun
);
168 static void print_withspace(const char *str
) {
169 if (printf("%s ", str
) == EOF
) outerr();
172 static void print_ttl(struct query_node
*qun
, adns_answer
*answer
) {
176 switch (qun
->pqfr
.ttl
) {
180 if (time(&now
) == (time_t)-1) sysfail("get current time",errno
);
181 ttl
= answer
->expires
< now ?
0 : answer
->expires
- now
;
184 ttl
= answer
->expires
;
189 if (printf("%lu ",ttl
) == EOF
) outerr();
192 static const char *owner_show(struct query_node
*qun
, adns_answer
*answer
) {
193 return answer
->owner ? answer
->owner
: qun
->owner
;
196 static void print_owner_ttl(struct query_node
*qun
, adns_answer
*answer
) {
197 if (qun
->pqfr
.show_owner
) print_withspace(owner_show(qun
,answer
));
198 print_ttl(qun
,answer
);
201 static void check_status(adns_status st
) {
202 static const adns_status statuspoints
[]= {
204 adns_s_max_localfail
, adns_s_max_remotefail
, adns_s_max_tempfail
,
205 adns_s_max_misconfig
, adns_s_max_misquery
208 const adns_status
*spp
;
211 for (minrcode
=0, spp
=statuspoints
;
212 spp
< statuspoints
+ (sizeof(statuspoints
)/sizeof(statuspoints
[0]));
214 if (st
> *spp
) minrcode
++;
215 if (rcode
< minrcode
) rcode
= minrcode
;
218 static void print_status(adns_status st
, struct query_node
*qun
, adns_answer
*answer
) {
219 const char *statustypeabbrev
, *statusabbrev
, *statusstring
;
221 statustypeabbrev
= adns_errtypeabbrev(st
);
222 statusabbrev
= adns_errabbrev(st
);
223 statusstring
= adns_strerror(st
);
224 assert(!strchr(statusstring
,'"'));
226 if (printf("%s %d %s ", statustypeabbrev
, st
, statusabbrev
)
228 print_owner_ttl(qun
,answer
);
229 if (qun
->pqfr
.show_cname
)
230 print_withspace(answer
->cname ? answer
->cname
: "$");
231 if (printf("\"%s\"\n", statusstring
) == EOF
) outerr();
234 static void print_dnsfail(adns_status st
, struct query_node
*qun
, adns_answer
*answer
) {
236 const char *typename
, *statusstring
;
238 if (ov_format
== fmt_inline
) {
239 if (fputs("; failed ",stdout
) == EOF
) outerr();
240 print_status(st
,qun
,answer
);
243 assert(ov_format
== fmt_simple
);
244 if (st
== adns_s_nxdomain
) {
245 r
= fprintf(stderr
,"%s does not exist\n", owner_show(qun
,answer
));
247 type_info(answer
->type
, &typename
, 0,0);
248 if (st
== adns_s_nodata
) {
249 r
= fprintf(stderr
,"%s has no %s record\n", owner_show(qun
,answer
), typename
);
251 statusstring
= adns_strerror(st
);
252 r
= fprintf(stderr
,"Error during DNS %s lookup for %s: %s\n",
253 typename
, owner_show(qun
,answer
), statusstring
);
256 if (r
== EOF
) sysfail("write error message to stderr",errno
);
259 void query_done(struct query_node
*qun
, adns_answer
*answer
) {
262 const char *rrp
, *realowner
, *typename
;
267 if (ov_format
== fmt_asynch
) {
269 if (printf("%s %d ", qun
->id
, nrrs
) == EOF
) outerr();
270 print_status(st
,qun
,answer
);
272 if (qun
->pqfr
.show_cname
&& answer
->cname
) {
273 print_owner_ttl(qun
,answer
);
274 if (qun
->pqfr
.show_type
) print_withspace("CNAME");
275 if (printf("%s\n", answer
->cname
) == EOF
) outerr();
279 print_dnsfail(st
,qun
,answer
);
282 if (qun
->pqfr
.show_owner
) {
283 realowner
= answer
->cname ? answer
->cname
: owner_show(qun
,answer
);
289 for (rrn
=0, rrp
= answer
->rrs
.untyped
;
291 rrn
++, rrp
+= answer
->rrsz
) {
292 if (realowner
) print_withspace(realowner
);
293 print_ttl(qun
,answer
);
294 type_info(answer
->type
,&typename
, rrp
,&datastr
);
295 if (qun
->pqfr
.show_type
) print_withspace(typename
);
296 if (printf("%s\n",datastr
) == EOF
) outerr();
300 if (fflush(stdout
)) outerr();
305 void of_asynch_id(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
307 ov_id
= xstrsave(arg
);
310 void of_cancel_id(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
311 struct query_node
*qun
;
313 for (qun
= outstanding
.head
;
314 qun
&& strcmp(qun
->id
,arg
);
317 adns_cancel(qun
->qu
);