Commit | Line | Data |
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b3543b6b | 1 | /* |
2 | * adh-query.c | |
3 | * - useful general-purpose resolver client program | |
4 | * make queries and print answers | |
5 | */ | |
6 | /* | |
39f45e7e | 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.) | |
b3543b6b | 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 | ||
aa1d7195 | 28 | #include "adnshost.h" |
29 | ||
30 | adns_state ads; | |
2798305f | 31 | struct outstanding_list outstanding; |
aa1d7195 | 32 | |
2798305f | 33 | static unsigned long idcounter; |
34 | ||
2798305f | 35 | void ensure_adns_init(void) { |
09aee00b | 36 | adns_initflags initflags; |
2798305f | 37 | int r; |
38 | ||
39 | if (ads) return; | |
b3543b6b | 40 | |
2798305f | 41 | if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno); |
09aee00b | 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 | } | |
2798305f | 51 | if (r) sysfail("adns_init",r); |
e02793ec | 52 | |
53 | if (ov_format == fmt_default) | |
54 | ov_format= ov_asynch ? fmt_asynch : fmt_simple; | |
2798305f | 55 | } |
b3543b6b | 56 | |
7d0aaee4 | 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 | ||
5e6342f0 | 71 | static void prep_query(struct query_node **qun_r, int *quflags_r) { |
b3543b6b | 72 | struct query_node *qun; |
73 | char idbuf[20]; | |
5e6342f0 | 74 | |
75 | if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line"); | |
76 | ensure_adns_init(); | |
77 | ||
b3543b6b | 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 | } | |
5e6342f0 | 87 | |
88 | *quflags_r= | |
89 | (ov_search ? adns_qf_search : 0) | | |
90 | (ov_tcp ? adns_qf_usevc : 0) | | |
e02793ec | 91 | ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) | |
5e6342f0 | 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) | | |
95 | ov_cname, | |
96 | ||
97 | *qun_r= qun; | |
98 | } | |
b3543b6b | 99 | |
d2f6d877 | 100 | void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) { |
5e6342f0 | 101 | struct query_node *qun; |
102 | int quflags, r; | |
8a53cf7f MW |
103 | struct addrinfo *ai, ai_hint = { 0 }; |
104 | int err; | |
5e6342f0 | 105 | |
8a53cf7f MW |
106 | ai_hint.ai_family = AF_UNSPEC; |
107 | ai_hint.ai_socktype = SOCK_DGRAM; | |
108 | ai_hint.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV; | |
109 | ||
110 | err = getaddrinfo(arg, 0, &ai_hint, &ai); | |
111 | if (err) usageerr("invalid IP address %s",arg); | |
5e6342f0 | 112 | |
113 | prep_query(&qun,&quflags); | |
f57665b9 | 114 | qun->owner= xstrsave(arg); |
5e6342f0 | 115 | r= adns_submit_reverse(ads, |
8a53cf7f | 116 | ai->ai_addr, |
5e6342f0 | 117 | ov_type == adns_r_none ? adns_r_ptr : ov_type, |
118 | quflags, | |
119 | qun, | |
120 | &qun->qu); | |
121 | if (r) sysfail("adns_submit_reverse",r); | |
8a53cf7f | 122 | freeaddrinfo(ai); |
5e6342f0 | 123 | |
124 | LIST_LINK_TAIL(outstanding,qun); | |
125 | } | |
126 | ||
d2f6d877 | 127 | void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) { |
128 | struct query_node *qun; | |
129 | int quflags, r; | |
8a53cf7f MW |
130 | struct addrinfo *ai, ai_hint = { 0 }; |
131 | int err; | |
132 | ||
133 | ai_hint.ai_family = AF_UNSPEC; | |
134 | ai_hint.ai_socktype = SOCK_DGRAM; | |
135 | ai_hint.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV; | |
d2f6d877 | 136 | |
8a53cf7f MW |
137 | err = getaddrinfo(arg, 0, &ai_hint, &ai); |
138 | if (err) usageerr("invalid IP address %s",arg); | |
d2f6d877 | 139 | |
140 | prep_query(&qun,&quflags); | |
141 | qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2); | |
142 | sprintf(qun->owner, "%s %s", arg,arg2); | |
143 | r= adns_submit_reverse_any(ads, | |
8a53cf7f | 144 | ai->ai_addr, arg2, |
d2f6d877 | 145 | ov_type == adns_r_none ? adns_r_txt : ov_type, |
146 | quflags, | |
147 | qun, | |
148 | &qun->qu); | |
149 | if (r) sysfail("adns_submit_reverse",r); | |
8a53cf7f | 150 | freeaddrinfo(ai); |
d2f6d877 | 151 | |
152 | LIST_LINK_TAIL(outstanding,qun); | |
153 | } | |
154 | ||
5e6342f0 | 155 | void query_do(const char *domain) { |
156 | struct query_node *qun; | |
157 | int quflags, r; | |
158 | ||
159 | prep_query(&qun,&quflags); | |
f57665b9 | 160 | qun->owner= xstrsave(domain); |
aa1d7195 | 161 | r= adns_submit(ads, domain, |
162 | ov_type == adns_r_none ? adns_r_addr : ov_type, | |
5e6342f0 | 163 | quflags, |
b3543b6b | 164 | qun, |
165 | &qun->qu); | |
166 | if (r) sysfail("adns_submit",r); | |
167 | ||
aa1d7195 | 168 | LIST_LINK_TAIL(outstanding,qun); |
b3543b6b | 169 | } |
aa1d7195 | 170 | |
5692efb1 | 171 | static void dequeue_query(struct query_node *qun) { |
172 | LIST_UNLINK(outstanding,qun); | |
173 | free(qun->id); | |
09aee00b | 174 | free(qun->owner); |
5692efb1 | 175 | free(qun); |
176 | } | |
177 | ||
2798305f | 178 | static void print_withspace(const char *str) { |
179 | if (printf("%s ", str) == EOF) outerr(); | |
180 | } | |
181 | ||
182 | static void print_ttl(struct query_node *qun, adns_answer *answer) { | |
183 | unsigned long ttl; | |
184 | time_t now; | |
185 | ||
186 | switch (qun->pqfr.ttl) { | |
187 | case tm_none: | |
188 | return; | |
189 | case tm_rel: | |
190 | if (time(&now) == (time_t)-1) sysfail("get current time",errno); | |
191 | ttl= answer->expires < now ? 0 : answer->expires - now; | |
192 | break; | |
193 | case tm_abs: | |
194 | ttl= answer->expires; | |
195 | break; | |
196 | default: | |
197 | abort(); | |
198 | } | |
199 | if (printf("%lu ",ttl) == EOF) outerr(); | |
200 | } | |
201 | ||
f57665b9 | 202 | static const char *owner_show(struct query_node *qun, adns_answer *answer) { |
203 | return answer->owner ? answer->owner : qun->owner; | |
204 | } | |
205 | ||
2798305f | 206 | static void print_owner_ttl(struct query_node *qun, adns_answer *answer) { |
f57665b9 | 207 | if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer)); |
2798305f | 208 | print_ttl(qun,answer); |
209 | } | |
210 | ||
e02793ec | 211 | static void check_status(adns_status st) { |
5692efb1 | 212 | static const adns_status statuspoints[]= { |
213 | adns_s_ok, | |
214 | adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail, | |
215 | adns_s_max_misconfig, adns_s_max_misquery | |
216 | }; | |
217 | ||
218 | const adns_status *spp; | |
5692efb1 | 219 | int minrcode; |
220 | ||
5692efb1 | 221 | for (minrcode=0, spp=statuspoints; |
222 | spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0])); | |
223 | spp++) | |
224 | if (st > *spp) minrcode++; | |
225 | if (rcode < minrcode) rcode= minrcode; | |
e02793ec | 226 | } |
2798305f | 227 | |
e02793ec | 228 | static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) { |
229 | const char *statustypeabbrev, *statusabbrev, *statusstring; | |
230 | ||
231 | statustypeabbrev= adns_errtypeabbrev(st); | |
2798305f | 232 | statusabbrev= adns_errabbrev(st); |
233 | statusstring= adns_strerror(st); | |
234 | assert(!strchr(statusstring,'"')); | |
235 | ||
5692efb1 | 236 | if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev) |
2798305f | 237 | == EOF) outerr(); |
238 | print_owner_ttl(qun,answer); | |
239 | if (qun->pqfr.show_cname) | |
240 | print_withspace(answer->cname ? answer->cname : "$"); | |
241 | if (printf("\"%s\"\n", statusstring) == EOF) outerr(); | |
242 | } | |
243 | ||
e02793ec | 244 | static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) { |
245 | int r; | |
246 | const char *typename, *statusstring; | |
e02793ec | 247 | |
248 | if (ov_format == fmt_inline) { | |
249 | if (fputs("; failed ",stdout) == EOF) outerr(); | |
250 | print_status(st,qun,answer); | |
251 | return; | |
252 | } | |
253 | assert(ov_format == fmt_simple); | |
254 | if (st == adns_s_nxdomain) { | |
f57665b9 | 255 | r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer)); |
e02793ec | 256 | } else { |
7d0aaee4 | 257 | type_info(answer->type, &typename, 0,0); |
e02793ec | 258 | if (st == adns_s_nodata) { |
f57665b9 | 259 | r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename); |
e02793ec | 260 | } else { |
261 | statusstring= adns_strerror(st); | |
262 | r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n", | |
f57665b9 | 263 | typename, owner_show(qun,answer), statusstring); |
e02793ec | 264 | } |
265 | } | |
266 | if (r == EOF) sysfail("write error message to stderr",errno); | |
267 | } | |
268 | ||
2798305f | 269 | void query_done(struct query_node *qun, adns_answer *answer) { |
7d0aaee4 | 270 | adns_status st; |
2798305f | 271 | int rrn, nrrs; |
272 | const char *rrp, *realowner, *typename; | |
273 | char *datastr; | |
274 | ||
2798305f | 275 | st= answer->status; |
276 | nrrs= answer->nrrs; | |
e02793ec | 277 | if (ov_format == fmt_asynch) { |
278 | check_status(st); | |
196e9104 | 279 | if (printf("%s %d ", qun->id, nrrs) == EOF) outerr(); |
2798305f | 280 | print_status(st,qun,answer); |
281 | } else { | |
e02793ec | 282 | if (qun->pqfr.show_cname && answer->cname) { |
2798305f | 283 | print_owner_ttl(qun,answer); |
e02793ec | 284 | if (qun->pqfr.show_type) print_withspace("CNAME"); |
285 | if (printf("%s\n", answer->cname) == EOF) outerr(); | |
286 | } | |
287 | if (st) { | |
288 | check_status(st); | |
289 | print_dnsfail(st,qun,answer); | |
2798305f | 290 | } |
291 | } | |
292 | if (qun->pqfr.show_owner) { | |
f57665b9 | 293 | realowner= answer->cname ? answer->cname : owner_show(qun,answer); |
2798305f | 294 | assert(realowner); |
295 | } else { | |
296 | realowner= 0; | |
297 | } | |
298 | if (nrrs) { | |
299 | for (rrn=0, rrp = answer->rrs.untyped; | |
300 | rrn < nrrs; | |
301 | rrn++, rrp += answer->rrsz) { | |
302 | if (realowner) print_withspace(realowner); | |
303 | print_ttl(qun,answer); | |
7d0aaee4 | 304 | type_info(answer->type,&typename, rrp,&datastr); |
2798305f | 305 | if (qun->pqfr.show_type) print_withspace(typename); |
306 | if (printf("%s\n",datastr) == EOF) outerr(); | |
307 | free(datastr); | |
308 | } | |
309 | } | |
310 | if (fflush(stdout)) outerr(); | |
2798305f | 311 | free(answer); |
5692efb1 | 312 | dequeue_query(qun); |
2798305f | 313 | } |
314 | ||
d2f6d877 | 315 | void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) { |
2798305f | 316 | free(ov_id); |
317 | ov_id= xstrsave(arg); | |
318 | } | |
319 | ||
d2f6d877 | 320 | void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) { |
5692efb1 | 321 | struct query_node *qun; |
2798305f | 322 | |
5692efb1 | 323 | for (qun= outstanding.head; |
caa16c6a | 324 | qun && strcmp(qun->id,arg); |
5692efb1 | 325 | qun= qun->next); |
326 | if (!qun) return; | |
327 | adns_cancel(qun->qu); | |
328 | dequeue_query(qun); | |
329 | } |