3 * - useful general-purpose resolver client program
4 * make queries and print answers
8 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
10 * It is part of adns, which is
11 * Copyright (C) 1997-1999 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) {
41 if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno);
43 adns_if_noautosys|adns_if_nosigpipe |
44 (ov_env ? 0 : adns_if_noenv) |
47 if (r) sysfail("adns_init",r);
49 if (ov_format == fmt_default)
50 ov_format= ov_asynch ? fmt_asynch : fmt_simple;
53 static void prep_query(struct query_node **qun_r, int *quflags_r) {
54 struct query_node *qun;
57 if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line");
60 qun= malloc(sizeof(*qun));
63 qun->id= xstrsave(ov_id);
65 sprintf(idbuf,"%lu",idcounter++);
66 idcounter &= 0x0fffffffflu;
67 qun->id= xstrsave(idbuf);
71 (ov_search ? adns_qf_search : 0) |
72 (ov_tcp ? adns_qf_usevc : 0) |
73 ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) |
74 (ov_qc_query ? adns_qf_quoteok_query : 0) |
75 (ov_qc_anshost ? adns_qf_quoteok_anshost : 0) |
76 (ov_qc_cname ? 0 : adns_qf_quoteok_cname) |
82 void of_ptr(const struct optioninfo *oi, const char *arg) {
83 struct query_node *qun;
85 struct sockaddr_in sa;
87 memset(&sa,0,sizeof(sa));
88 sa.sin_family= AF_INET;
89 if (!inet_aton(arg,&sa.sin_addr)) usageerr("invalid IP address %s",arg);
91 prep_query(&qun,&quflags);
92 r= adns_submit_reverse(ads,
93 (struct sockaddr*)&sa,
94 ov_type == adns_r_none ? adns_r_ptr : ov_type,
98 if (r) sysfail("adns_submit_reverse",r);
100 LIST_LINK_TAIL(outstanding,qun);
103 void query_do(const char *domain) {
104 struct query_node *qun;
107 prep_query(&qun,&quflags);
108 r= adns_submit(ads, domain,
109 ov_type == adns_r_none ? adns_r_addr : ov_type,
113 if (r) sysfail("adns_submit",r);
115 LIST_LINK_TAIL(outstanding,qun);
118 static void dequeue_query(struct query_node *qun) {
119 LIST_UNLINK(outstanding,qun);
124 static void print_withspace(const char *str) {
125 if (printf("%s ", str) == EOF) outerr();
128 static void print_ttl(struct query_node *qun, adns_answer *answer) {
132 switch (qun->pqfr.ttl) {
136 if (time(&now) == (time_t)-1) sysfail("get current time",errno);
137 ttl= answer->expires < now ? 0 : answer->expires - now;
140 ttl= answer->expires;
145 if (printf("%lu ",ttl) == EOF) outerr();
148 static void print_owner_ttl(struct query_node *qun, adns_answer *answer) {
149 if (qun->pqfr.show_owner) print_withspace(answer->owner);
150 print_ttl(qun,answer);
153 static void check_status(adns_status st) {
154 static const adns_status statuspoints[]= {
156 adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail,
157 adns_s_max_misconfig, adns_s_max_misquery
160 const adns_status *spp;
163 for (minrcode=0, spp=statuspoints;
164 spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0]));
166 if (st > *spp) minrcode++;
167 if (rcode < minrcode) rcode= minrcode;
170 static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) {
171 const char *statustypeabbrev, *statusabbrev, *statusstring;
173 statustypeabbrev= adns_errtypeabbrev(st);
174 statusabbrev= adns_errabbrev(st);
175 statusstring= adns_strerror(st);
176 assert(!strchr(statusstring,'"'));
178 if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev)
180 print_owner_ttl(qun,answer);
181 if (qun->pqfr.show_cname)
182 print_withspace(answer->cname ? answer->cname : "$");
183 if (printf("\"%s\"\n", statusstring) == EOF) outerr();
186 static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) {
188 const char *typename, *statusstring;
191 if (ov_format == fmt_inline) {
192 if (fputs("; failed ",stdout) == EOF) outerr();
193 print_status(st,qun,answer);
196 assert(ov_format == fmt_simple);
197 if (st == adns_s_nxdomain) {
198 r= fprintf(stderr,"%s does not exist\n", answer->owner);
200 ist= adns_rr_info(answer->type, &typename, 0,0,0,0);
201 if (st == adns_s_nodata) {
202 r= fprintf(stderr,"%s has no %s record\n", answer->owner, typename);
204 statusstring= adns_strerror(st);
205 r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n",
206 typename, answer->owner, statusstring);
209 if (r == EOF) sysfail("write error message to stderr",errno);
212 void query_done(struct query_node *qun, adns_answer *answer) {
215 const char *rrp, *realowner, *typename;
220 if (ov_format == fmt_asynch) {
222 if (printf("%s %d ", qun->id, nrrs) == EOF) outerr();
223 print_status(st,qun,answer);
225 if (qun->pqfr.show_cname && answer->cname) {
226 print_owner_ttl(qun,answer);
227 if (qun->pqfr.show_type) print_withspace("CNAME");
228 if (printf("%s\n", answer->cname) == EOF) outerr();
232 print_dnsfail(st,qun,answer);
235 if (qun->pqfr.show_owner) {
236 realowner= answer->cname ? answer->cname : answer->owner;
242 for (rrn=0, rrp = answer->rrs.untyped;
244 rrn++, rrp += answer->rrsz) {
245 if (realowner) print_withspace(realowner);
246 print_ttl(qun,answer);
247 ist= adns_rr_info(answer->type, &typename, 0, 0, rrp, &datastr);
248 if (ist == adns_s_nomemory) sysfail("adns_rr_info failed",ENOMEM);
250 if (qun->pqfr.show_type) print_withspace(typename);
251 if (printf("%s\n",datastr) == EOF) outerr();
255 if (fflush(stdout)) outerr();
260 void of_asynch_id(const struct optioninfo *oi, const char *arg) {
262 ov_id= xstrsave(arg);
265 void of_cancel_id(const struct optioninfo *oi, const char *arg) {
266 struct query_node *qun;
268 for (qun= outstanding.head;
269 qun && strcmp(qun->id,arg);
272 adns_cancel(qun->qu);