3 * - useful general-purpose resolver client program
4 * make queries and print answers
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.)
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)
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.
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.
31 struct outstanding_list outstanding;
33 static unsigned long idcounter;
35 void ensure_adns_init(void) {
36 adns_initflags initflags;
41 if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno);
43 initflags= adns_if_noautosys|adns_if_nosigpipe|ov_verbose;
44 if (!ov_env) initflags |= adns_if_noenv;
47 r= adns_init_strcfg(&ads, initflags, stderr, config_text);
49 r= adns_init(&ads, initflags, 0);
51 if (r) sysfail("adns_init",r);
53 if (ov_format == fmt_default)
54 ov_format= ov_asynch ? fmt_asynch : fmt_simple;
57 void type_info(adns_rrtype type, const char **typename_r,
58 const void *datap, char **data_r) {
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);
65 if (typename_r && !*typename_r) {
66 sprintf(buf,"TYPE%d", (int)(type & adns_rrt_typemask));
71 static void prep_query(struct query_node **qun_r, int *quflags_r) {
72 struct query_node *qun;
75 if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line");
78 qun= malloc(sizeof(*qun));
81 qun->id= xstrsave(ov_id);
83 sprintf(idbuf,"%lu",idcounter++);
84 idcounter &= 0x0fffffffflu;
85 qun->id= xstrsave(idbuf);
89 (ov_search ? adns_qf_search : 0) |
90 (ov_tcp ? adns_qf_usevc : 0) |
91 ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) |
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) |
100 static void sockaddr_aton(const char *text, adns_rr_addr *a) {
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);
110 void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) {
111 struct query_node *qun;
115 sockaddr_aton(arg,&a);
116 prep_query(&qun,&quflags);
117 qun->owner= xstrsave(arg);
118 r= adns_submit_reverse(ads, &a.addr.sa,
119 ov_type == adns_r_none ? adns_r_ptr : ov_type,
123 if (r) sysfail("adns_submit_reverse",r);
125 LIST_LINK_TAIL(outstanding,qun);
128 void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) {
129 struct query_node *qun;
133 sockaddr_aton(arg,&a);
134 prep_query(&qun,&quflags);
135 qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2);
136 sprintf(qun->owner, "%s %s", arg,arg2);
137 r= adns_submit_reverse_any(ads, &a.addr.sa,arg2,
138 ov_type == adns_r_none ? adns_r_txt : ov_type,
142 if (r) sysfail("adns_submit_reverse",r);
144 LIST_LINK_TAIL(outstanding,qun);
147 void query_do(const char *domain) {
148 struct query_node *qun;
151 prep_query(&qun,&quflags);
152 qun->owner= xstrsave(domain);
153 r= adns_submit(ads, domain,
154 ov_type == adns_r_none ? adns_r_addr : ov_type,
158 if (r) sysfail("adns_submit",r);
160 LIST_LINK_TAIL(outstanding,qun);
163 static void dequeue_query(struct query_node *qun) {
164 LIST_UNLINK(outstanding,qun);
170 static void print_withspace(const char *str) {
171 if (printf("%s ", str) == EOF) outerr();
174 static void print_ttl(struct query_node *qun, adns_answer *answer) {
178 switch (qun->pqfr.ttl) {
182 if (time(&now) == (time_t)-1) sysfail("get current time",errno);
183 ttl= answer->expires < now ? 0 : answer->expires - now;
186 ttl= answer->expires;
191 if (printf("%lu ",ttl) == EOF) outerr();
194 static const char *owner_show(struct query_node *qun, adns_answer *answer) {
195 return answer->owner ? answer->owner : qun->owner;
198 static void print_owner_ttl(struct query_node *qun, adns_answer *answer) {
199 if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer));
200 print_ttl(qun,answer);
203 static void check_status(adns_status st) {
204 static const adns_status statuspoints[]= {
206 adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail,
207 adns_s_max_misconfig, adns_s_max_misquery
210 const adns_status *spp;
213 for (minrcode=0, spp=statuspoints;
214 spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0]));
216 if (st > *spp) minrcode++;
217 if (rcode < minrcode) rcode= minrcode;
220 static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) {
221 const char *statustypeabbrev, *statusabbrev, *statusstring;
223 statustypeabbrev= adns_errtypeabbrev(st);
224 statusabbrev= adns_errabbrev(st);
225 statusstring= adns_strerror(st);
226 assert(!strchr(statusstring,'"'));
228 if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev)
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();
236 static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) {
238 const char *typename, *statusstring;
240 if (ov_format == fmt_inline) {
241 if (fputs("; failed ",stdout) == EOF) outerr();
242 print_status(st,qun,answer);
245 assert(ov_format == fmt_simple);
246 if (st == adns_s_nxdomain) {
247 r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer));
249 type_info(answer->type, &typename, 0,0);
250 if (st == adns_s_nodata) {
251 r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename);
253 statusstring= adns_strerror(st);
254 r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n",
255 typename, owner_show(qun,answer), statusstring);
258 if (r == EOF) sysfail("write error message to stderr",errno);
261 void query_done(struct query_node *qun, adns_answer *answer) {
264 const char *rrp, *realowner, *typename;
269 if (ov_format == fmt_asynch) {
271 if (printf("%s %d ", qun->id, nrrs) == EOF) outerr();
272 print_status(st,qun,answer);
274 if (qun->pqfr.show_cname && answer->cname) {
275 print_owner_ttl(qun,answer);
276 if (qun->pqfr.show_type) print_withspace("CNAME");
277 if (printf("%s\n", answer->cname) == EOF) outerr();
281 print_dnsfail(st,qun,answer);
284 if (qun->pqfr.show_owner) {
285 realowner= answer->cname ? answer->cname : owner_show(qun,answer);
291 for (rrn=0, rrp = answer->rrs.untyped;
293 rrn++, rrp += answer->rrsz) {
294 if (realowner) print_withspace(realowner);
295 print_ttl(qun,answer);
296 type_info(answer->type,&typename, rrp,&datastr);
297 if (qun->pqfr.show_type) print_withspace(typename);
298 if (printf("%s\n",datastr) == EOF) outerr();
302 if (fflush(stdout)) outerr();
307 void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
309 ov_id= xstrsave(arg);
312 void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
313 struct query_node *qun;
315 for (qun= outstanding.head;
316 qun && strcmp(qun->id,arg);
319 adns_cancel(qun->qu);