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 void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) {
101 struct query_node *qun;
103 struct sockaddr_in sa;
105 memset(&sa,0,sizeof(sa));
106 sa.sin_family= AF_INET;
107 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
109 prep_query(&qun,&quflags);
110 qun->owner= xstrsave(arg);
111 r= adns_submit_reverse(ads,
112 (struct sockaddr*)&sa,
113 ov_type == adns_r_none ? adns_r_ptr : ov_type,
117 if (r) sysfail("adns_submit_reverse",r);
119 LIST_LINK_TAIL(outstanding,qun);
122 void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) {
123 struct query_node *qun;
125 struct sockaddr_in sa;
127 memset(&sa,0,sizeof(sa));
128 sa.sin_family= AF_INET;
129 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
131 prep_query(&qun,&quflags);
132 qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2);
133 sprintf(qun->owner, "%s %s", arg,arg2);
134 r= adns_submit_reverse_any(ads,
135 (struct sockaddr*)&sa, arg2,
136 ov_type == adns_r_none ? adns_r_txt : ov_type,
140 if (r) sysfail("adns_submit_reverse",r);
142 LIST_LINK_TAIL(outstanding,qun);
145 void query_do(const char *domain) {
146 struct query_node *qun;
149 prep_query(&qun,&quflags);
150 qun->owner= xstrsave(domain);
151 r= adns_submit(ads, domain,
152 ov_type == adns_r_none ? adns_r_addr : ov_type,
156 if (r) sysfail("adns_submit",r);
158 LIST_LINK_TAIL(outstanding,qun);
161 static void dequeue_query(struct query_node *qun) {
162 LIST_UNLINK(outstanding,qun);
168 static void print_withspace(const char *str) {
169 if (printf("%s ", str) == EOF) outerr();
172 static void print_ttl(struct query_node *qun, adns_answer *answer) {
176 switch (qun->pqfr.ttl) {
180 if (time(&now) == (time_t)-1) sysfail("get current time",errno);
181 ttl= answer->expires < now ? 0 : answer->expires - now;
184 ttl= answer->expires;
189 if (printf("%lu ",ttl) == EOF) outerr();
192 static const char *owner_show(struct query_node *qun, adns_answer *answer) {
193 return answer->owner ? answer->owner : qun->owner;
196 static void print_owner_ttl(struct query_node *qun, adns_answer *answer) {
197 if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer));
198 print_ttl(qun,answer);
201 static void check_status(adns_status st) {
202 static const adns_status statuspoints[]= {
204 adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail,
205 adns_s_max_misconfig, adns_s_max_misquery
208 const adns_status *spp;
211 for (minrcode=0, spp=statuspoints;
212 spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0]));
214 if (st > *spp) minrcode++;
215 if (rcode < minrcode) rcode= minrcode;
218 static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) {
219 const char *statustypeabbrev, *statusabbrev, *statusstring;
221 statustypeabbrev= adns_errtypeabbrev(st);
222 statusabbrev= adns_errabbrev(st);
223 statusstring= adns_strerror(st);
224 assert(!strchr(statusstring,'"'));
226 if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev)
228 print_owner_ttl(qun,answer);
229 if (qun->pqfr.show_cname)
230 print_withspace(answer->cname ? answer->cname : "$");
231 if (printf("\"%s\"\n", statusstring) == EOF) outerr();
234 static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) {
236 const char *typename, *statusstring;
238 if (ov_format == fmt_inline) {
239 if (fputs("; failed ",stdout) == EOF) outerr();
240 print_status(st,qun,answer);
243 assert(ov_format == fmt_simple);
244 if (st == adns_s_nxdomain) {
245 r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer));
247 type_info(answer->type, &typename, 0,0);
248 if (st == adns_s_nodata) {
249 r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename);
251 statusstring= adns_strerror(st);
252 r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n",
253 typename, owner_show(qun,answer), statusstring);
256 if (r == EOF) sysfail("write error message to stderr",errno);
259 void query_done(struct query_node *qun, adns_answer *answer) {
262 const char *rrp, *realowner, *typename;
267 if (ov_format == fmt_asynch) {
269 if (printf("%s %d ", qun->id, nrrs) == EOF) outerr();
270 print_status(st,qun,answer);
272 if (qun->pqfr.show_cname && answer->cname) {
273 print_owner_ttl(qun,answer);
274 if (qun->pqfr.show_type) print_withspace("CNAME");
275 if (printf("%s\n", answer->cname) == EOF) outerr();
279 print_dnsfail(st,qun,answer);
282 if (qun->pqfr.show_owner) {
283 realowner= answer->cname ? answer->cname : owner_show(qun,answer);
289 for (rrn=0, rrp = answer->rrs.untyped;
291 rrn++, rrp += answer->rrsz) {
292 if (realowner) print_withspace(realowner);
293 print_ttl(qun,answer);
294 type_info(answer->type,&typename, rrp,&datastr);
295 if (qun->pqfr.show_type) print_withspace(typename);
296 if (printf("%s\n",datastr) == EOF) outerr();
300 if (fflush(stdout)) outerr();
305 void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
307 ov_id= xstrsave(arg);
310 void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
311 struct query_node *qun;
313 for (qun= outstanding.head;
314 qun && strcmp(qun->id,arg);
317 adns_cancel(qun->qu);