Commit | Line | Data |
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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 | } | |
844e3556 MW |
99 | |
100 | static void sockaddr_aton(const char *text, adns_rr_addr *a) { | |
101 | int err; | |
102 | ||
103 | a->len= sizeof(a->addr); | |
104 | err= adns_text2addr(text,0,adns_qf_addrlit_scope_forbid, | |
105 | &a->addr.sa,&a->len); | |
106 | if (err == EINVAL) usageerr("invalid IP address %s",text); | |
107 | else if (err) sysfail("adns_text2addr",err); | |
108 | } | |
d1cff511 | 109 | |
2b1c6979 | 110 | void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) { |
d7449548 | 111 | struct query_node *qun; |
112 | int quflags, r; | |
844e3556 | 113 | adns_rr_addr a; |
d7449548 | 114 | |
844e3556 | 115 | sockaddr_aton(arg,&a); |
d7449548 | 116 | prep_query(&qun,&quflags); |
4b2c4f8a | 117 | qun->owner= xstrsave(arg); |
844e3556 | 118 | r= adns_submit_reverse(ads, &a.addr.sa, |
d7449548 | 119 | ov_type == adns_r_none ? adns_r_ptr : ov_type, |
120 | quflags, | |
121 | qun, | |
122 | &qun->qu); | |
123 | if (r) sysfail("adns_submit_reverse",r); | |
124 | ||
125 | LIST_LINK_TAIL(outstanding,qun); | |
126 | } | |
127 | ||
2b1c6979 | 128 | void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) { |
129 | struct query_node *qun; | |
130 | int quflags, r; | |
844e3556 | 131 | adns_rr_addr a; |
2b1c6979 | 132 | |
844e3556 | 133 | sockaddr_aton(arg,&a); |
2b1c6979 | 134 | prep_query(&qun,&quflags); |
135 | qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2); | |
136 | sprintf(qun->owner, "%s %s", arg,arg2); | |
844e3556 | 137 | r= adns_submit_reverse_any(ads, &a.addr.sa,arg2, |
2b1c6979 | 138 | ov_type == adns_r_none ? adns_r_txt : ov_type, |
139 | quflags, | |
140 | qun, | |
141 | &qun->qu); | |
142 | if (r) sysfail("adns_submit_reverse",r); | |
143 | ||
144 | LIST_LINK_TAIL(outstanding,qun); | |
145 | } | |
146 | ||
d7449548 | 147 | void query_do(const char *domain) { |
148 | struct query_node *qun; | |
149 | int quflags, r; | |
150 | ||
151 | prep_query(&qun,&quflags); | |
4b2c4f8a | 152 | qun->owner= xstrsave(domain); |
e3f575ff | 153 | r= adns_submit(ads, domain, |
154 | ov_type == adns_r_none ? adns_r_addr : ov_type, | |
d7449548 | 155 | quflags, |
d1cff511 | 156 | qun, |
157 | &qun->qu); | |
158 | if (r) sysfail("adns_submit",r); | |
159 | ||
e3f575ff | 160 | LIST_LINK_TAIL(outstanding,qun); |
d1cff511 | 161 | } |
e3f575ff | 162 | |
9fa14499 | 163 | static void dequeue_query(struct query_node *qun) { |
164 | LIST_UNLINK(outstanding,qun); | |
165 | free(qun->id); | |
0ebff22d | 166 | free(qun->owner); |
9fa14499 | 167 | free(qun); |
168 | } | |
169 | ||
57d68ed1 | 170 | static void print_withspace(const char *str) { |
171 | if (printf("%s ", str) == EOF) outerr(); | |
172 | } | |
173 | ||
174 | static void print_ttl(struct query_node *qun, adns_answer *answer) { | |
175 | unsigned long ttl; | |
176 | time_t now; | |
177 | ||
178 | switch (qun->pqfr.ttl) { | |
179 | case tm_none: | |
180 | return; | |
181 | case tm_rel: | |
182 | if (time(&now) == (time_t)-1) sysfail("get current time",errno); | |
183 | ttl= answer->expires < now ? 0 : answer->expires - now; | |
184 | break; | |
185 | case tm_abs: | |
186 | ttl= answer->expires; | |
187 | break; | |
188 | default: | |
189 | abort(); | |
190 | } | |
191 | if (printf("%lu ",ttl) == EOF) outerr(); | |
192 | } | |
193 | ||
4b2c4f8a | 194 | static const char *owner_show(struct query_node *qun, adns_answer *answer) { |
195 | return answer->owner ? answer->owner : qun->owner; | |
196 | } | |
197 | ||
57d68ed1 | 198 | static void print_owner_ttl(struct query_node *qun, adns_answer *answer) { |
4b2c4f8a | 199 | if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer)); |
57d68ed1 | 200 | print_ttl(qun,answer); |
201 | } | |
202 | ||
413b9ad6 | 203 | static void check_status(adns_status st) { |
9fa14499 | 204 | static const adns_status statuspoints[]= { |
205 | adns_s_ok, | |
206 | adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail, | |
207 | adns_s_max_misconfig, adns_s_max_misquery | |
208 | }; | |
209 | ||
210 | const adns_status *spp; | |
9fa14499 | 211 | int minrcode; |
212 | ||
9fa14499 | 213 | for (minrcode=0, spp=statuspoints; |
214 | spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0])); | |
215 | spp++) | |
216 | if (st > *spp) minrcode++; | |
217 | if (rcode < minrcode) rcode= minrcode; | |
413b9ad6 | 218 | } |
57d68ed1 | 219 | |
413b9ad6 | 220 | static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) { |
221 | const char *statustypeabbrev, *statusabbrev, *statusstring; | |
222 | ||
223 | statustypeabbrev= adns_errtypeabbrev(st); | |
57d68ed1 | 224 | statusabbrev= adns_errabbrev(st); |
225 | statusstring= adns_strerror(st); | |
226 | assert(!strchr(statusstring,'"')); | |
227 | ||
9fa14499 | 228 | if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev) |
57d68ed1 | 229 | == EOF) outerr(); |
230 | print_owner_ttl(qun,answer); | |
231 | if (qun->pqfr.show_cname) | |
232 | print_withspace(answer->cname ? answer->cname : "$"); | |
233 | if (printf("\"%s\"\n", statusstring) == EOF) outerr(); | |
234 | } | |
235 | ||
413b9ad6 | 236 | static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) { |
237 | int r; | |
238 | const char *typename, *statusstring; | |
413b9ad6 | 239 | |
240 | if (ov_format == fmt_inline) { | |
241 | if (fputs("; failed ",stdout) == EOF) outerr(); | |
242 | print_status(st,qun,answer); | |
243 | return; | |
244 | } | |
245 | assert(ov_format == fmt_simple); | |
246 | if (st == adns_s_nxdomain) { | |
4b2c4f8a | 247 | r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer)); |
413b9ad6 | 248 | } else { |
2c6eb096 | 249 | type_info(answer->type, &typename, 0,0); |
413b9ad6 | 250 | if (st == adns_s_nodata) { |
4b2c4f8a | 251 | r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename); |
413b9ad6 | 252 | } else { |
253 | statusstring= adns_strerror(st); | |
254 | r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n", | |
4b2c4f8a | 255 | typename, owner_show(qun,answer), statusstring); |
413b9ad6 | 256 | } |
257 | } | |
258 | if (r == EOF) sysfail("write error message to stderr",errno); | |
259 | } | |
260 | ||
57d68ed1 | 261 | void query_done(struct query_node *qun, adns_answer *answer) { |
2c6eb096 | 262 | adns_status st; |
57d68ed1 | 263 | int rrn, nrrs; |
264 | const char *rrp, *realowner, *typename; | |
265 | char *datastr; | |
266 | ||
57d68ed1 | 267 | st= answer->status; |
268 | nrrs= answer->nrrs; | |
413b9ad6 | 269 | if (ov_format == fmt_asynch) { |
270 | check_status(st); | |
0b6f56cc | 271 | if (printf("%s %d ", qun->id, nrrs) == EOF) outerr(); |
57d68ed1 | 272 | print_status(st,qun,answer); |
273 | } else { | |
413b9ad6 | 274 | if (qun->pqfr.show_cname && answer->cname) { |
57d68ed1 | 275 | print_owner_ttl(qun,answer); |
413b9ad6 | 276 | if (qun->pqfr.show_type) print_withspace("CNAME"); |
277 | if (printf("%s\n", answer->cname) == EOF) outerr(); | |
278 | } | |
279 | if (st) { | |
280 | check_status(st); | |
281 | print_dnsfail(st,qun,answer); | |
57d68ed1 | 282 | } |
283 | } | |
284 | if (qun->pqfr.show_owner) { | |
4b2c4f8a | 285 | realowner= answer->cname ? answer->cname : owner_show(qun,answer); |
57d68ed1 | 286 | assert(realowner); |
287 | } else { | |
288 | realowner= 0; | |
289 | } | |
290 | if (nrrs) { | |
291 | for (rrn=0, rrp = answer->rrs.untyped; | |
292 | rrn < nrrs; | |
293 | rrn++, rrp += answer->rrsz) { | |
294 | if (realowner) print_withspace(realowner); | |
295 | print_ttl(qun,answer); | |
2c6eb096 | 296 | type_info(answer->type,&typename, rrp,&datastr); |
57d68ed1 | 297 | if (qun->pqfr.show_type) print_withspace(typename); |
298 | if (printf("%s\n",datastr) == EOF) outerr(); | |
299 | free(datastr); | |
300 | } | |
301 | } | |
302 | if (fflush(stdout)) outerr(); | |
57d68ed1 | 303 | free(answer); |
9fa14499 | 304 | dequeue_query(qun); |
57d68ed1 | 305 | } |
306 | ||
2b1c6979 | 307 | void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) { |
57d68ed1 | 308 | free(ov_id); |
309 | ov_id= xstrsave(arg); | |
310 | } | |
311 | ||
2b1c6979 | 312 | void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) { |
9fa14499 | 313 | struct query_node *qun; |
57d68ed1 | 314 | |
9fa14499 | 315 | for (qun= outstanding.head; |
e0d855e1 | 316 | qun && strcmp(qun->id,arg); |
9fa14499 | 317 | qun= qun->next); |
318 | if (!qun) return; | |
319 | adns_cancel(qun->qu); | |
320 | dequeue_query(qun); | |
321 | } |