d1cff511 |
1 | /* |
2 | * adh-query.c |
3 | * - useful general-purpose resolver client program |
4 | * make queries and print answers |
5 | */ |
6 | /* |
ae8cc977 |
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.) |
d1cff511 |
12 | * |
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) |
16 | * any later version. |
17 | * |
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. |
22 | * |
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. |
26 | */ |
27 | |
e3f575ff |
28 | #include "adnshost.h" |
29 | |
30 | adns_state ads; |
57d68ed1 |
31 | struct outstanding_list outstanding; |
e3f575ff |
32 | |
57d68ed1 |
33 | static unsigned long idcounter; |
34 | |
57d68ed1 |
35 | void ensure_adns_init(void) { |
0ebff22d |
36 | adns_initflags initflags; |
57d68ed1 |
37 | int r; |
38 | |
39 | if (ads) return; |
d1cff511 |
40 | |
57d68ed1 |
41 | if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno); |
0ebff22d |
42 | |
43 | initflags= adns_if_noautosys|adns_if_nosigpipe|ov_verbose; |
44 | if (!ov_env) initflags |= adns_if_noenv; |
45 | |
46 | if (config_text) { |
47 | r= adns_init_strcfg(&ads, initflags, stderr, config_text); |
48 | } else { |
49 | r= adns_init(&ads, initflags, 0); |
50 | } |
57d68ed1 |
51 | if (r) sysfail("adns_init",r); |
413b9ad6 |
52 | |
53 | if (ov_format == fmt_default) |
54 | ov_format= ov_asynch ? fmt_asynch : fmt_simple; |
57d68ed1 |
55 | } |
d1cff511 |
56 | |
2c6eb096 |
57 | void type_info(adns_rrtype type, const char **typename_r, |
58 | const void *datap, char **data_r) { |
59 | static char buf[12]; |
60 | adns_status st; |
61 | |
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); |
64 | assert(!st); |
65 | if (typename_r && !*typename_r) { |
66 | sprintf(buf,"TYPE%d", (int)(type & adns_rrt_typemask)); |
67 | *typename_r= buf; |
68 | } |
69 | } |
70 | |
d7449548 |
71 | static void prep_query(struct query_node **qun_r, int *quflags_r) { |
d1cff511 |
72 | struct query_node *qun; |
73 | char idbuf[20]; |
d7449548 |
74 | |
75 | if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line"); |
76 | ensure_adns_init(); |
77 | |
d1cff511 |
78 | qun= malloc(sizeof(*qun)); |
79 | qun->pqfr= ov_pqfr; |
80 | if (ov_id) { |
81 | qun->id= xstrsave(ov_id); |
82 | } else { |
83 | sprintf(idbuf,"%lu",idcounter++); |
84 | idcounter &= 0x0fffffffflu; |
85 | qun->id= xstrsave(idbuf); |
86 | } |
d7449548 |
87 | |
88 | *quflags_r= |
89 | (ov_search ? adns_qf_search : 0) | |
90 | (ov_tcp ? adns_qf_usevc : 0) | |
413b9ad6 |
91 | ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) | |
d7449548 |
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) | |
75884a15 |
95 | ov_cname; |
d7449548 |
96 | |
97 | *qun_r= qun; |
98 | } |
d1cff511 |
99 | |
2b1c6979 |
100 | void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) { |
d7449548 |
101 | struct query_node *qun; |
102 | int quflags, r; |
103 | struct sockaddr_in sa; |
104 | |
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); |
108 | |
109 | prep_query(&qun,&quflags); |
4b2c4f8a |
110 | qun->owner= xstrsave(arg); |
d7449548 |
111 | r= adns_submit_reverse(ads, |
112 | (struct sockaddr*)&sa, |
113 | ov_type == adns_r_none ? adns_r_ptr : ov_type, |
114 | quflags, |
115 | qun, |
116 | &qun->qu); |
117 | if (r) sysfail("adns_submit_reverse",r); |
118 | |
119 | LIST_LINK_TAIL(outstanding,qun); |
120 | } |
121 | |
2b1c6979 |
122 | void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) { |
123 | struct query_node *qun; |
124 | int quflags, r; |
125 | struct sockaddr_in sa; |
126 | |
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); |
130 | |
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, |
137 | quflags, |
138 | qun, |
139 | &qun->qu); |
140 | if (r) sysfail("adns_submit_reverse",r); |
141 | |
142 | LIST_LINK_TAIL(outstanding,qun); |
143 | } |
144 | |
d7449548 |
145 | void query_do(const char *domain) { |
146 | struct query_node *qun; |
147 | int quflags, r; |
148 | |
149 | prep_query(&qun,&quflags); |
4b2c4f8a |
150 | qun->owner= xstrsave(domain); |
e3f575ff |
151 | r= adns_submit(ads, domain, |
152 | ov_type == adns_r_none ? adns_r_addr : ov_type, |
d7449548 |
153 | quflags, |
d1cff511 |
154 | qun, |
155 | &qun->qu); |
156 | if (r) sysfail("adns_submit",r); |
157 | |
e3f575ff |
158 | LIST_LINK_TAIL(outstanding,qun); |
d1cff511 |
159 | } |
e3f575ff |
160 | |
9fa14499 |
161 | static void dequeue_query(struct query_node *qun) { |
162 | LIST_UNLINK(outstanding,qun); |
163 | free(qun->id); |
0ebff22d |
164 | free(qun->owner); |
9fa14499 |
165 | free(qun); |
166 | } |
167 | |
57d68ed1 |
168 | static void print_withspace(const char *str) { |
169 | if (printf("%s ", str) == EOF) outerr(); |
170 | } |
171 | |
172 | static void print_ttl(struct query_node *qun, adns_answer *answer) { |
173 | unsigned long ttl; |
174 | time_t now; |
175 | |
176 | switch (qun->pqfr.ttl) { |
177 | case tm_none: |
178 | return; |
179 | case tm_rel: |
180 | if (time(&now) == (time_t)-1) sysfail("get current time",errno); |
181 | ttl= answer->expires < now ? 0 : answer->expires - now; |
182 | break; |
183 | case tm_abs: |
184 | ttl= answer->expires; |
185 | break; |
186 | default: |
187 | abort(); |
188 | } |
189 | if (printf("%lu ",ttl) == EOF) outerr(); |
190 | } |
191 | |
4b2c4f8a |
192 | static const char *owner_show(struct query_node *qun, adns_answer *answer) { |
193 | return answer->owner ? answer->owner : qun->owner; |
194 | } |
195 | |
57d68ed1 |
196 | static void print_owner_ttl(struct query_node *qun, adns_answer *answer) { |
4b2c4f8a |
197 | if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer)); |
57d68ed1 |
198 | print_ttl(qun,answer); |
199 | } |
200 | |
413b9ad6 |
201 | static void check_status(adns_status st) { |
9fa14499 |
202 | static const adns_status statuspoints[]= { |
203 | adns_s_ok, |
204 | adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail, |
205 | adns_s_max_misconfig, adns_s_max_misquery |
206 | }; |
207 | |
208 | const adns_status *spp; |
9fa14499 |
209 | int minrcode; |
210 | |
9fa14499 |
211 | for (minrcode=0, spp=statuspoints; |
212 | spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0])); |
213 | spp++) |
214 | if (st > *spp) minrcode++; |
215 | if (rcode < minrcode) rcode= minrcode; |
413b9ad6 |
216 | } |
57d68ed1 |
217 | |
413b9ad6 |
218 | static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) { |
219 | const char *statustypeabbrev, *statusabbrev, *statusstring; |
220 | |
221 | statustypeabbrev= adns_errtypeabbrev(st); |
57d68ed1 |
222 | statusabbrev= adns_errabbrev(st); |
223 | statusstring= adns_strerror(st); |
224 | assert(!strchr(statusstring,'"')); |
225 | |
9fa14499 |
226 | if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev) |
57d68ed1 |
227 | == EOF) outerr(); |
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(); |
232 | } |
233 | |
413b9ad6 |
234 | static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) { |
235 | int r; |
236 | const char *typename, *statusstring; |
413b9ad6 |
237 | |
238 | if (ov_format == fmt_inline) { |
239 | if (fputs("; failed ",stdout) == EOF) outerr(); |
240 | print_status(st,qun,answer); |
241 | return; |
242 | } |
243 | assert(ov_format == fmt_simple); |
244 | if (st == adns_s_nxdomain) { |
4b2c4f8a |
245 | r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer)); |
413b9ad6 |
246 | } else { |
2c6eb096 |
247 | type_info(answer->type, &typename, 0,0); |
413b9ad6 |
248 | if (st == adns_s_nodata) { |
4b2c4f8a |
249 | r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename); |
413b9ad6 |
250 | } else { |
251 | statusstring= adns_strerror(st); |
252 | r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n", |
4b2c4f8a |
253 | typename, owner_show(qun,answer), statusstring); |
413b9ad6 |
254 | } |
255 | } |
256 | if (r == EOF) sysfail("write error message to stderr",errno); |
257 | } |
258 | |
57d68ed1 |
259 | void query_done(struct query_node *qun, adns_answer *answer) { |
2c6eb096 |
260 | adns_status st; |
57d68ed1 |
261 | int rrn, nrrs; |
262 | const char *rrp, *realowner, *typename; |
263 | char *datastr; |
264 | |
57d68ed1 |
265 | st= answer->status; |
266 | nrrs= answer->nrrs; |
413b9ad6 |
267 | if (ov_format == fmt_asynch) { |
268 | check_status(st); |
0b6f56cc |
269 | if (printf("%s %d ", qun->id, nrrs) == EOF) outerr(); |
57d68ed1 |
270 | print_status(st,qun,answer); |
271 | } else { |
413b9ad6 |
272 | if (qun->pqfr.show_cname && answer->cname) { |
57d68ed1 |
273 | print_owner_ttl(qun,answer); |
413b9ad6 |
274 | if (qun->pqfr.show_type) print_withspace("CNAME"); |
275 | if (printf("%s\n", answer->cname) == EOF) outerr(); |
276 | } |
277 | if (st) { |
278 | check_status(st); |
279 | print_dnsfail(st,qun,answer); |
57d68ed1 |
280 | } |
281 | } |
282 | if (qun->pqfr.show_owner) { |
4b2c4f8a |
283 | realowner= answer->cname ? answer->cname : owner_show(qun,answer); |
57d68ed1 |
284 | assert(realowner); |
285 | } else { |
286 | realowner= 0; |
287 | } |
288 | if (nrrs) { |
289 | for (rrn=0, rrp = answer->rrs.untyped; |
290 | rrn < nrrs; |
291 | rrn++, rrp += answer->rrsz) { |
292 | if (realowner) print_withspace(realowner); |
293 | print_ttl(qun,answer); |
2c6eb096 |
294 | type_info(answer->type,&typename, rrp,&datastr); |
57d68ed1 |
295 | if (qun->pqfr.show_type) print_withspace(typename); |
296 | if (printf("%s\n",datastr) == EOF) outerr(); |
297 | free(datastr); |
298 | } |
299 | } |
300 | if (fflush(stdout)) outerr(); |
57d68ed1 |
301 | free(answer); |
9fa14499 |
302 | dequeue_query(qun); |
57d68ed1 |
303 | } |
304 | |
2b1c6979 |
305 | void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) { |
57d68ed1 |
306 | free(ov_id); |
307 | ov_id= xstrsave(arg); |
308 | } |
309 | |
2b1c6979 |
310 | void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) { |
9fa14499 |
311 | struct query_node *qun; |
57d68ed1 |
312 | |
9fa14499 |
313 | for (qun= outstanding.head; |
e0d855e1 |
314 | qun && strcmp(qun->id,arg); |
9fa14499 |
315 | qun= qun->next); |
316 | if (!qun) return; |
317 | adns_cancel(qun->qu); |
318 | dequeue_query(qun); |
319 | } |