3 * - useful general-purpose resolver client program
4 * make queries and print answers
8 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
10 * It is part of adns, which is
11 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
12 * Copyright (C) 1999 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) {
41 if (signal(SIGPIPE
,SIG_IGN
) == SIG_ERR
) sysfail("ignore SIGPIPE",errno
);
43 adns_if_noautosys
|adns_if_nosigpipe
|
44 (ov_env ?
0 : adns_if_noenv
) |
47 if (r
) sysfail("adns_init",r
);
49 if (ov_format
== fmt_default
)
50 ov_format
= ov_asynch ? fmt_asynch
: fmt_simple
;
53 static void prep_query(struct query_node
**qun_r
, int *quflags_r
) {
54 struct query_node
*qun
;
57 if (ov_pipe
&& !ads
) usageerr("-f/--pipe not consistent with domains on command line");
60 qun
= malloc(sizeof(*qun
));
63 qun
->id
= xstrsave(ov_id
);
65 sprintf(idbuf
,"%lu",idcounter
++);
66 idcounter
&= 0x0fffffffflu
;
67 qun
->id
= xstrsave(idbuf
);
71 (ov_search ? adns_qf_search
: 0) |
72 (ov_tcp ? adns_qf_usevc
: 0) |
73 ((ov_pqfr
.show_owner
|| ov_format
== fmt_simple
) ? adns_qf_owner
: 0) |
74 (ov_qc_query ? adns_qf_quoteok_query
: 0) |
75 (ov_qc_anshost ? adns_qf_quoteok_anshost
: 0) |
76 (ov_qc_cname ?
0 : adns_qf_quoteok_cname
) |
82 void of_ptr(const struct optioninfo
*oi
, const char *arg
) {
83 struct query_node
*qun
;
85 struct sockaddr_in sa
;
87 memset(&sa
,0,sizeof(sa
));
88 sa
.sin_family
= AF_INET
;
89 if (!inet_aton(arg
,&sa
.sin_addr
)) usageerr("invalid IP address %s",arg
);
91 prep_query(&qun
,&quflags
);
92 r
= adns_submit_reverse(ads
,
93 (struct sockaddr
*)&sa
,
94 ov_type
== adns_r_none ? adns_r_ptr
: ov_type
,
98 if (r
) sysfail("adns_submit_reverse",r
);
100 LIST_LINK_TAIL(outstanding
,qun
);
103 void query_do(const char *domain
) {
104 struct query_node
*qun
;
107 prep_query(&qun
,&quflags
);
108 r
= adns_submit(ads
, domain
,
109 ov_type
== adns_r_none ? adns_r_addr
: ov_type
,
113 if (r
) sysfail("adns_submit",r
);
115 LIST_LINK_TAIL(outstanding
,qun
);
118 static void dequeue_query(struct query_node
*qun
) {
119 LIST_UNLINK(outstanding
,qun
);
124 static void print_withspace(const char *str
) {
125 if (printf("%s ", str
) == EOF
) outerr();
128 static void print_ttl(struct query_node
*qun
, adns_answer
*answer
) {
132 switch (qun
->pqfr
.ttl
) {
136 if (time(&now
) == (time_t)-1) sysfail("get current time",errno
);
137 ttl
= answer
->expires
< now ?
0 : answer
->expires
- now
;
140 ttl
= answer
->expires
;
145 if (printf("%lu ",ttl
) == EOF
) outerr();
148 static void print_owner_ttl(struct query_node
*qun
, adns_answer
*answer
) {
149 if (qun
->pqfr
.show_owner
) print_withspace(answer
->owner
);
150 print_ttl(qun
,answer
);
153 static void check_status(adns_status st
) {
154 static const adns_status statuspoints
[]= {
156 adns_s_max_localfail
, adns_s_max_remotefail
, adns_s_max_tempfail
,
157 adns_s_max_misconfig
, adns_s_max_misquery
160 const adns_status
*spp
;
163 for (minrcode
=0, spp
=statuspoints
;
164 spp
< statuspoints
+ (sizeof(statuspoints
)/sizeof(statuspoints
[0]));
166 if (st
> *spp
) minrcode
++;
167 if (rcode
< minrcode
) rcode
= minrcode
;
170 static void print_status(adns_status st
, struct query_node
*qun
, adns_answer
*answer
) {
171 const char *statustypeabbrev
, *statusabbrev
, *statusstring
;
173 statustypeabbrev
= adns_errtypeabbrev(st
);
174 statusabbrev
= adns_errabbrev(st
);
175 statusstring
= adns_strerror(st
);
176 assert(!strchr(statusstring
,'"'));
178 if (printf("%s %d %s ", statustypeabbrev
, st
, statusabbrev
)
180 print_owner_ttl(qun
,answer
);
181 if (qun
->pqfr
.show_cname
)
182 print_withspace(answer
->cname ? answer
->cname
: "$");
183 if (printf("\"%s\"\n", statusstring
) == EOF
) outerr();
186 static void print_dnsfail(adns_status st
, struct query_node
*qun
, adns_answer
*answer
) {
188 const char *typename
, *statusstring
;
191 if (ov_format
== fmt_inline
) {
192 if (fputs("; failed ",stdout
) == EOF
) outerr();
193 print_status(st
,qun
,answer
);
196 assert(ov_format
== fmt_simple
);
197 if (st
== adns_s_nxdomain
) {
198 r
= fprintf(stderr
,"%s does not exist\n", answer
->owner
);
200 ist
= adns_rr_info(answer
->type
, &typename
, 0,0,0,0);
201 if (st
== adns_s_nodata
) {
202 r
= fprintf(stderr
,"%s has no %s record\n", answer
->owner
, typename
);
204 statusstring
= adns_strerror(st
);
205 r
= fprintf(stderr
,"Error during DNS %s lookup for %s: %s\n",
206 typename
, answer
->owner
, statusstring
);
209 if (r
== EOF
) sysfail("write error message to stderr",errno
);
212 void query_done(struct query_node
*qun
, adns_answer
*answer
) {
215 const char *rrp
, *realowner
, *typename
;
220 if (ov_format
== fmt_asynch
) {
222 if (printf("%s %d ", qun
->id
, nrrs
) == EOF
) outerr();
223 print_status(st
,qun
,answer
);
225 if (qun
->pqfr
.show_cname
&& answer
->cname
) {
226 print_owner_ttl(qun
,answer
);
227 if (qun
->pqfr
.show_type
) print_withspace("CNAME");
228 if (printf("%s\n", answer
->cname
) == EOF
) outerr();
232 print_dnsfail(st
,qun
,answer
);
235 if (qun
->pqfr
.show_owner
) {
236 realowner
= answer
->cname ? answer
->cname
: answer
->owner
;
242 for (rrn
=0, rrp
= answer
->rrs
.untyped
;
244 rrn
++, rrp
+= answer
->rrsz
) {
245 if (realowner
) print_withspace(realowner
);
246 print_ttl(qun
,answer
);
247 ist
= adns_rr_info(answer
->type
, &typename
, 0, 0, rrp
, &datastr
);
248 if (ist
== adns_s_nomemory
) sysfail("adns_rr_info failed",ENOMEM
);
250 if (qun
->pqfr
.show_type
) print_withspace(typename
);
251 if (printf("%s\n",datastr
) == EOF
) outerr();
255 if (fflush(stdout
)) outerr();
260 void of_asynch_id(const struct optioninfo
*oi
, const char *arg
) {
262 ov_id
= xstrsave(arg
);
265 void of_cancel_id(const struct optioninfo
*oi
, const char *arg
) {
266 struct query_node
*qun
;
268 for (qun
= outstanding
.head
;
269 qun
&& strcmp(qun
->id
,arg
);
272 adns_cancel(qun
->qu
);