3 * - useful general-purpose resolver client program
4 * make queries and print answers
8 * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
10 * It is part of adns, which is
11 * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
12 * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 struct outstanding_list outstanding
;
34 static unsigned long idcounter
;
36 void ensure_adns_init(void) {
37 adns_initflags initflags
;
42 if (signal(SIGPIPE
,SIG_IGN
) == SIG_ERR
) sysfail("ignore SIGPIPE",errno
);
44 initflags
= adns_if_noautosys
|adns_if_nosigpipe
|ov_verbose
;
45 if (!ov_env
) initflags
|= adns_if_noenv
;
48 r
= adns_init_strcfg(&ads
, initflags
, stderr
, config_text
);
50 r
= adns_init(&ads
, initflags
, 0);
52 if (r
) sysfail("adns_init",r
);
54 if (ov_format
== fmt_default
)
55 ov_format
= ov_asynch ? fmt_asynch
: fmt_simple
;
58 static void prep_query(struct query_node
**qun_r
, int *quflags_r
) {
59 struct query_node
*qun
;
62 if (ov_pipe
&& !ads
) usageerr("-f/--pipe not consistent with domains on command line");
65 qun
= malloc(sizeof(*qun
));
68 qun
->id
= xstrsave(ov_id
);
70 sprintf(idbuf
,"%lu",idcounter
++);
71 idcounter
&= 0x0fffffffflu
;
72 qun
->id
= xstrsave(idbuf
);
76 (ov_search ? adns_qf_search
: 0) |
77 (ov_tcp ? adns_qf_usevc
: 0) |
78 ((ov_pqfr
.show_owner
|| ov_format
== fmt_simple
) ? adns_qf_owner
: 0) |
79 (ov_qc_query ? adns_qf_quoteok_query
: 0) |
80 (ov_qc_anshost ? adns_qf_quoteok_anshost
: 0) |
81 (ov_qc_cname ?
0 : adns_qf_quoteok_cname
) |
87 void of_ptr(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
88 struct query_node
*qun
;
90 struct sockaddr_in sa
;
92 memset(&sa
,0,sizeof(sa
));
93 sa
.sin_family
= AF_INET
;
94 if (!inet_aton(arg
,&sa
.sin_addr
)) usageerr("invalid IP address %s",arg
);
96 prep_query(&qun
,&quflags
);
97 qun
->owner
= xstrsave(arg
);
98 r
= adns_submit_reverse(ads
,
99 (struct sockaddr
*)&sa
,
100 ov_type
== adns_r_none ? adns_r_ptr
: ov_type
,
104 if (r
) sysfail("adns_submit_reverse",r
);
106 LIST_LINK_TAIL(outstanding
,qun
);
109 void of_reverse(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
110 struct query_node
*qun
;
112 struct sockaddr_in sa
;
114 memset(&sa
,0,sizeof(sa
));
115 sa
.sin_family
= AF_INET
;
116 if (!inet_aton(arg
,&sa
.sin_addr
)) usageerr("invalid IP address %s",arg
);
118 prep_query(&qun
,&quflags
);
119 qun
->owner
= xmalloc(strlen(arg
) + strlen(arg2
) + 2);
120 sprintf(qun
->owner
, "%s %s", arg
,arg2
);
121 r
= adns_submit_reverse_any(ads
,
122 (struct sockaddr
*)&sa
, arg2
,
123 ov_type
== adns_r_none ? adns_r_txt
: ov_type
,
127 if (r
) sysfail("adns_submit_reverse",r
);
129 LIST_LINK_TAIL(outstanding
,qun
);
132 void query_do(const char *domain
) {
133 struct query_node
*qun
;
136 prep_query(&qun
,&quflags
);
137 qun
->owner
= xstrsave(domain
);
138 r
= adns_submit(ads
, domain
,
139 ov_type
== adns_r_none ? adns_r_addr
: ov_type
,
143 if (r
) sysfail("adns_submit",r
);
145 LIST_LINK_TAIL(outstanding
,qun
);
148 static void dequeue_query(struct query_node
*qun
) {
149 LIST_UNLINK(outstanding
,qun
);
155 static void print_withspace(const char *str
) {
156 if (printf("%s ", str
) == EOF
) outerr();
159 static void print_ttl(struct query_node
*qun
, adns_answer
*answer
) {
163 switch (qun
->pqfr
.ttl
) {
167 if (time(&now
) == (time_t)-1) sysfail("get current time",errno
);
168 ttl
= answer
->expires
< now ?
0 : answer
->expires
- now
;
171 ttl
= answer
->expires
;
176 if (printf("%lu ",ttl
) == EOF
) outerr();
179 static const char *owner_show(struct query_node
*qun
, adns_answer
*answer
) {
180 return answer
->owner ? answer
->owner
: qun
->owner
;
183 static void print_owner_ttl(struct query_node
*qun
, adns_answer
*answer
) {
184 if (qun
->pqfr
.show_owner
) print_withspace(owner_show(qun
,answer
));
185 print_ttl(qun
,answer
);
188 static void check_status(adns_status st
) {
189 static const adns_status statuspoints
[]= {
191 adns_s_max_localfail
, adns_s_max_remotefail
, adns_s_max_tempfail
,
192 adns_s_max_misconfig
, adns_s_max_misquery
195 const adns_status
*spp
;
198 for (minrcode
=0, spp
=statuspoints
;
199 spp
< statuspoints
+ (sizeof(statuspoints
)/sizeof(statuspoints
[0]));
201 if (st
> *spp
) minrcode
++;
202 if (rcode
< minrcode
) rcode
= minrcode
;
205 static void print_status(adns_status st
, struct query_node
*qun
, adns_answer
*answer
) {
206 const char *statustypeabbrev
, *statusabbrev
, *statusstring
;
208 statustypeabbrev
= adns_errtypeabbrev(st
);
209 statusabbrev
= adns_errabbrev(st
);
210 statusstring
= adns_strerror(st
);
211 assert(!strchr(statusstring
,'"'));
213 if (printf("%s %d %s ", statustypeabbrev
, st
, statusabbrev
)
215 print_owner_ttl(qun
,answer
);
216 if (qun
->pqfr
.show_cname
)
217 print_withspace(answer
->cname ? answer
->cname
: "$");
218 if (printf("\"%s\"\n", statusstring
) == EOF
) outerr();
221 static void print_dnsfail(adns_status st
, struct query_node
*qun
, adns_answer
*answer
) {
223 const char *typename
, *statusstring
;
226 if (ov_format
== fmt_inline
) {
227 if (fputs("; failed ",stdout
) == EOF
) outerr();
228 print_status(st
,qun
,answer
);
231 assert(ov_format
== fmt_simple
);
232 if (st
== adns_s_nxdomain
) {
233 r
= fprintf(stderr
,"%s does not exist\n", owner_show(qun
,answer
));
235 ist
= adns_rr_info(answer
->type
, &typename
, 0,0,0,0);
236 if (st
== adns_s_nodata
) {
237 r
= fprintf(stderr
,"%s has no %s record\n", owner_show(qun
,answer
), typename
);
239 statusstring
= adns_strerror(st
);
240 r
= fprintf(stderr
,"Error during DNS %s lookup for %s: %s\n",
241 typename
, owner_show(qun
,answer
), statusstring
);
244 if (r
== EOF
) sysfail("write error message to stderr",errno
);
247 void query_done(struct query_node
*qun
, adns_answer
*answer
) {
250 const char *rrp
, *realowner
, *typename
;
255 if (ov_format
== fmt_asynch
) {
257 if (printf("%s %d ", qun
->id
, nrrs
) == EOF
) outerr();
258 print_status(st
,qun
,answer
);
260 if (qun
->pqfr
.show_cname
&& answer
->cname
) {
261 print_owner_ttl(qun
,answer
);
262 if (qun
->pqfr
.show_type
) print_withspace("CNAME");
263 if (printf("%s\n", answer
->cname
) == EOF
) outerr();
267 print_dnsfail(st
,qun
,answer
);
270 if (qun
->pqfr
.show_owner
) {
271 realowner
= answer
->cname ? answer
->cname
: owner_show(qun
,answer
);
277 for (rrn
=0, rrp
= answer
->rrs
.untyped
;
279 rrn
++, rrp
+= answer
->rrsz
) {
280 if (realowner
) print_withspace(realowner
);
281 print_ttl(qun
,answer
);
282 ist
= adns_rr_info(answer
->type
, &typename
, 0, 0, rrp
, &datastr
);
283 if (ist
== adns_s_nomemory
) sysfail("adns_rr_info failed",ENOMEM
);
285 if (qun
->pqfr
.show_type
) print_withspace(typename
);
286 if (printf("%s\n",datastr
) == EOF
) outerr();
290 if (fflush(stdout
)) outerr();
295 void of_asynch_id(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
297 ov_id
= xstrsave(arg
);
300 void of_cancel_id(const struct optioninfo
*oi
, const char *arg
, const char *arg2
) {
301 struct query_node
*qun
;
303 for (qun
= outstanding
.head
;
304 qun
&& strcmp(qun
->id
,arg
);
307 adns_cancel(qun
->qu
);