3 * - useful general-purpose resolver client program
4 * make queries and print answers
8 * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
10 * It is part of adns, which is
11 * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
12 * Copyright (C) 1999-2000 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) {
37 adns_initflags initflags;
42 if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno);
44 initflags= adns_if_noautosys|adns_if_nosigpipe|ov_verbose;
45 if (!ov_env) initflags |= adns_if_noenv;
48 r= adns_init_strcfg(&ads, initflags, stderr, config_text);
50 r= adns_init(&ads, initflags, 0);
52 if (r) sysfail("adns_init",r);
54 if (ov_format == fmt_default)
55 ov_format= ov_asynch ? fmt_asynch : fmt_simple;
58 void type_info(adns_rrtype type, const char **typename_r,
59 const void *datap, char **data_r) {
63 st= adns_rr_info(type, typename_r, 0,0, datap,data_r);
64 if (st == adns_s_nomemory) sysfail("adns_rr_info failed",ENOMEM);
66 if (typename_r && !*typename_r) {
67 sprintf(buf,"TYPE%d", (int)(type & adns_rrt_typemask));
72 static void prep_query(struct query_node **qun_r, int *quflags_r) {
73 struct query_node *qun;
76 if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line");
79 qun= malloc(sizeof(*qun));
82 qun->id= xstrsave(ov_id);
84 sprintf(idbuf,"%lu",idcounter++);
85 idcounter &= 0x0fffffffflu;
86 qun->id= xstrsave(idbuf);
90 (ov_search ? adns_qf_search : 0) |
91 (ov_tcp ? adns_qf_usevc : 0) |
92 ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) |
93 (ov_qc_query ? adns_qf_quoteok_query : 0) |
94 (ov_qc_anshost ? adns_qf_quoteok_anshost : 0) |
95 (ov_qc_cname ? 0 : adns_qf_quoteok_cname) |
101 void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) {
102 struct query_node *qun;
104 struct sockaddr_in sa;
106 memset(&sa,0,sizeof(sa));
107 sa.sin_family= AF_INET;
108 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
110 prep_query(&qun,&quflags);
111 qun->owner= xstrsave(arg);
112 r= adns_submit_reverse(ads,
113 (struct sockaddr*)&sa,
114 ov_type == adns_r_none ? adns_r_ptr : ov_type,
118 if (r) sysfail("adns_submit_reverse",r);
120 LIST_LINK_TAIL(outstanding,qun);
123 void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) {
124 struct query_node *qun;
126 struct sockaddr_in sa;
128 memset(&sa,0,sizeof(sa));
129 sa.sin_family= AF_INET;
130 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
132 prep_query(&qun,&quflags);
133 qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2);
134 sprintf(qun->owner, "%s %s", arg,arg2);
135 r= adns_submit_reverse_any(ads,
136 (struct sockaddr*)&sa, arg2,
137 ov_type == adns_r_none ? adns_r_txt : ov_type,
141 if (r) sysfail("adns_submit_reverse",r);
143 LIST_LINK_TAIL(outstanding,qun);
146 void query_do(const char *domain) {
147 struct query_node *qun;
150 prep_query(&qun,&quflags);
151 qun->owner= xstrsave(domain);
152 r= adns_submit(ads, domain,
153 ov_type == adns_r_none ? adns_r_addr : ov_type,
157 if (r) sysfail("adns_submit",r);
159 LIST_LINK_TAIL(outstanding,qun);
162 static void dequeue_query(struct query_node *qun) {
163 LIST_UNLINK(outstanding,qun);
169 static void print_withspace(const char *str) {
170 if (printf("%s ", str) == EOF) outerr();
173 static void print_ttl(struct query_node *qun, adns_answer *answer) {
177 switch (qun->pqfr.ttl) {
181 if (time(&now) == (time_t)-1) sysfail("get current time",errno);
182 ttl= answer->expires < now ? 0 : answer->expires - now;
185 ttl= answer->expires;
190 if (printf("%lu ",ttl) == EOF) outerr();
193 static const char *owner_show(struct query_node *qun, adns_answer *answer) {
194 return answer->owner ? answer->owner : qun->owner;
197 static void print_owner_ttl(struct query_node *qun, adns_answer *answer) {
198 if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer));
199 print_ttl(qun,answer);
202 static void check_status(adns_status st) {
203 static const adns_status statuspoints[]= {
205 adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail,
206 adns_s_max_misconfig, adns_s_max_misquery
209 const adns_status *spp;
212 for (minrcode=0, spp=statuspoints;
213 spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0]));
215 if (st > *spp) minrcode++;
216 if (rcode < minrcode) rcode= minrcode;
219 static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) {
220 const char *statustypeabbrev, *statusabbrev, *statusstring;
222 statustypeabbrev= adns_errtypeabbrev(st);
223 statusabbrev= adns_errabbrev(st);
224 statusstring= adns_strerror(st);
225 assert(!strchr(statusstring,'"'));
227 if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev)
229 print_owner_ttl(qun,answer);
230 if (qun->pqfr.show_cname)
231 print_withspace(answer->cname ? answer->cname : "$");
232 if (printf("\"%s\"\n", statusstring) == EOF) outerr();
235 static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) {
237 const char *typename, *statusstring;
239 if (ov_format == fmt_inline) {
240 if (fputs("; failed ",stdout) == EOF) outerr();
241 print_status(st,qun,answer);
244 assert(ov_format == fmt_simple);
245 if (st == adns_s_nxdomain) {
246 r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer));
248 type_info(answer->type, &typename, 0,0);
249 if (st == adns_s_nodata) {
250 r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename);
252 statusstring= adns_strerror(st);
253 r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n",
254 typename, owner_show(qun,answer), statusstring);
257 if (r == EOF) sysfail("write error message to stderr",errno);
260 void query_done(struct query_node *qun, adns_answer *answer) {
263 const char *rrp, *realowner, *typename;
268 if (ov_format == fmt_asynch) {
270 if (printf("%s %d ", qun->id, nrrs) == EOF) outerr();
271 print_status(st,qun,answer);
273 if (qun->pqfr.show_cname && answer->cname) {
274 print_owner_ttl(qun,answer);
275 if (qun->pqfr.show_type) print_withspace("CNAME");
276 if (printf("%s\n", answer->cname) == EOF) outerr();
280 print_dnsfail(st,qun,answer);
283 if (qun->pqfr.show_owner) {
284 realowner= answer->cname ? answer->cname : owner_show(qun,answer);
290 for (rrn=0, rrp = answer->rrs.untyped;
292 rrn++, rrp += answer->rrsz) {
293 if (realowner) print_withspace(realowner);
294 print_ttl(qun,answer);
295 type_info(answer->type,&typename, rrp,&datastr);
296 if (qun->pqfr.show_type) print_withspace(typename);
297 if (printf("%s\n",datastr) == EOF) outerr();
301 if (fflush(stdout)) outerr();
306 void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
308 ov_id= xstrsave(arg);
311 void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
312 struct query_node *qun;
314 for (qun= outstanding.head;
315 qun && strcmp(qun->id,arg);
318 adns_cancel(qun->qu);