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 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 static void prep_query(struct query_node **qun_r, int *quflags_r) {
59 struct query_node *qun;
62 if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line");
65 qun= malloc(sizeof(*qun));
68 qun->id= xstrsave(ov_id);
70 sprintf(idbuf,"%lu",idcounter++);
71 idcounter &= 0x0fffffffflu;
72 qun->id= xstrsave(idbuf);
76 (ov_search ? adns_qf_search : 0) |
77 (ov_tcp ? adns_qf_usevc : 0) |
78 ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) |
79 (ov_qc_query ? adns_qf_quoteok_query : 0) |
80 (ov_qc_anshost ? adns_qf_quoteok_anshost : 0) |
81 (ov_qc_cname ? 0 : adns_qf_quoteok_cname) |
87 void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) {
88 struct query_node *qun;
90 struct sockaddr_in sa;
92 memset(&sa,0,sizeof(sa));
93 sa.sin_family= AF_INET;
94 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
96 prep_query(&qun,&quflags);
97 qun->owner= xstrsave(arg);
98 r= adns_submit_reverse(ads,
99 (struct sockaddr*)&sa,
100 ov_type == adns_r_none ? adns_r_ptr : ov_type,
104 if (r) sysfail("adns_submit_reverse",r);
106 LIST_LINK_TAIL(outstanding,qun);
109 void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) {
110 struct query_node *qun;
112 struct sockaddr_in sa;
114 memset(&sa,0,sizeof(sa));
115 sa.sin_family= AF_INET;
116 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
118 prep_query(&qun,&quflags);
119 qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2);
120 sprintf(qun->owner, "%s %s", arg,arg2);
121 r= adns_submit_reverse_any(ads,
122 (struct sockaddr*)&sa, arg2,
123 ov_type == adns_r_none ? adns_r_txt : ov_type,
127 if (r) sysfail("adns_submit_reverse",r);
129 LIST_LINK_TAIL(outstanding,qun);
132 void query_do(const char *domain) {
133 struct query_node *qun;
136 prep_query(&qun,&quflags);
137 qun->owner= xstrsave(domain);
138 r= adns_submit(ads, domain,
139 ov_type == adns_r_none ? adns_r_addr : ov_type,
143 if (r) sysfail("adns_submit",r);
145 LIST_LINK_TAIL(outstanding,qun);
148 static void dequeue_query(struct query_node *qun) {
149 LIST_UNLINK(outstanding,qun);
155 static void print_withspace(const char *str) {
156 if (printf("%s ", str) == EOF) outerr();
159 static void print_ttl(struct query_node *qun, adns_answer *answer) {
163 switch (qun->pqfr.ttl) {
167 if (time(&now) == (time_t)-1) sysfail("get current time",errno);
168 ttl= answer->expires < now ? 0 : answer->expires - now;
171 ttl= answer->expires;
176 if (printf("%lu ",ttl) == EOF) outerr();
179 static const char *owner_show(struct query_node *qun, adns_answer *answer) {
180 return answer->owner ? answer->owner : qun->owner;
183 static void print_owner_ttl(struct query_node *qun, adns_answer *answer) {
184 if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer));
185 print_ttl(qun,answer);
188 static void check_status(adns_status st) {
189 static const adns_status statuspoints[]= {
191 adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail,
192 adns_s_max_misconfig, adns_s_max_misquery
195 const adns_status *spp;
198 for (minrcode=0, spp=statuspoints;
199 spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0]));
201 if (st > *spp) minrcode++;
202 if (rcode < minrcode) rcode= minrcode;
205 static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) {
206 const char *statustypeabbrev, *statusabbrev, *statusstring;
208 statustypeabbrev= adns_errtypeabbrev(st);
209 statusabbrev= adns_errabbrev(st);
210 statusstring= adns_strerror(st);
211 assert(!strchr(statusstring,'"'));
213 if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev)
215 print_owner_ttl(qun,answer);
216 if (qun->pqfr.show_cname)
217 print_withspace(answer->cname ? answer->cname : "$");
218 if (printf("\"%s\"\n", statusstring) == EOF) outerr();
221 static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) {
223 const char *typename, *statusstring;
226 if (ov_format == fmt_inline) {
227 if (fputs("; failed ",stdout) == EOF) outerr();
228 print_status(st,qun,answer);
231 assert(ov_format == fmt_simple);
232 if (st == adns_s_nxdomain) {
233 r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer));
235 ist= adns_rr_info(answer->type, &typename, 0,0,0,0);
236 if (st == adns_s_nodata) {
237 r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename);
239 statusstring= adns_strerror(st);
240 r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n",
241 typename, owner_show(qun,answer), statusstring);
244 if (r == EOF) sysfail("write error message to stderr",errno);
247 void query_done(struct query_node *qun, adns_answer *answer) {
250 const char *rrp, *realowner, *typename;
255 if (ov_format == fmt_asynch) {
257 if (printf("%s %d ", qun->id, nrrs) == EOF) outerr();
258 print_status(st,qun,answer);
260 if (qun->pqfr.show_cname && answer->cname) {
261 print_owner_ttl(qun,answer);
262 if (qun->pqfr.show_type) print_withspace("CNAME");
263 if (printf("%s\n", answer->cname) == EOF) outerr();
267 print_dnsfail(st,qun,answer);
270 if (qun->pqfr.show_owner) {
271 realowner= answer->cname ? answer->cname : owner_show(qun,answer);
277 for (rrn=0, rrp = answer->rrs.untyped;
279 rrn++, rrp += answer->rrsz) {
280 if (realowner) print_withspace(realowner);
281 print_ttl(qun,answer);
282 ist= adns_rr_info(answer->type, &typename, 0, 0, rrp, &datastr);
283 if (ist == adns_s_nomemory) sysfail("adns_rr_info failed",ENOMEM);
285 if (qun->pqfr.show_type) print_withspace(typename);
286 if (printf("%s\n",datastr) == EOF) outerr();
290 if (fflush(stdout)) outerr();
295 void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
297 ov_id= xstrsave(arg);
300 void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
301 struct query_node *qun;
303 for (qun= outstanding.head;
304 qun && strcmp(qun->id,arg);
307 adns_cancel(qun->qu);