* make queries and print answers
*/
/*
- * This file is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- *
- * It is part of adns, which is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999 Tony Finch <dot@dotat.at>
+ * This file is part of adns, which is
+ * Copyright (C) 1997-2000,2003,2006 Ian Jackson
+ * Copyright (C) 1999-2000,2003,2006 Tony Finch
+ * Copyright (C) 1991 Massachusetts Institute of Technology
+ * (See the file INSTALL for full details.)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "adnshost.h"
adns_state ads;
-
-struct query_node {
- struct query_node *next, *back;
- struct perqueryflags_remember pqfr;
- char *id;
- adns_query qu;
-};
-
-static struct { struct query_node *head, *tail; } outstanding;
+struct outstanding_list outstanding;
static unsigned long idcounter;
-void domain_do(const char *domain) {
- struct query_node *qun;
- char idbuf[20];
+void ensure_adns_init(void) {
+ adns_initflags initflags;
int r;
+
+ if (ads) return;
- if (!ads) {
- if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno);
- r= adns_init(&ads,
- adns_if_noautosys|adns_if_nosigpipe |
- (ov_env ? 0 : adns_if_noenv) |
- ov_verbose,
- 0);
- if (r) sysfail("adns_init",r);
+ if (signal(SIGPIPE,SIG_IGN) == SIG_ERR) sysfail("ignore SIGPIPE",errno);
+
+ initflags= adns_if_noautosys|adns_if_nosigpipe|ov_verbose;
+ if (!ov_env) initflags |= adns_if_noenv;
+
+ if (config_text) {
+ r= adns_init_strcfg(&ads, initflags, stderr, config_text);
+ } else {
+ r= adns_init(&ads, initflags, 0);
}
+ if (r) sysfail("adns_init",r);
+
+ if (ov_format == fmt_default)
+ ov_format= ov_asynch ? fmt_asynch : fmt_simple;
+}
+void type_info(adns_rrtype type, const char **typename_r,
+ const void *datap, char **data_r) {
+ static char buf[12];
+ adns_status st;
+
+ st= adns_rr_info(type, typename_r, 0,0, datap,data_r);
+ if (st == adns_s_nomemory) sysfail("adns_rr_info failed",ENOMEM);
+ assert(!st);
+ if (typename_r && !*typename_r) {
+ sprintf(buf,"TYPE%d", (int)(type & adns_rrt_typemask));
+ *typename_r= buf;
+ }
+}
+
+static void prep_query(struct query_node **qun_r, int *quflags_r) {
+ struct query_node *qun;
+ char idbuf[20];
+
+ if (ov_pipe && !ads) usageerr("-f/--pipe not consistent with domains on command line");
+ ensure_adns_init();
+
qun= malloc(sizeof(*qun));
qun->pqfr= ov_pqfr;
if (ov_id) {
idcounter &= 0x0fffffffflu;
qun->id= xstrsave(idbuf);
}
+
+ *quflags_r=
+ (ov_search ? adns_qf_search : 0) |
+ (ov_tcp ? adns_qf_usevc : 0) |
+ ((ov_pqfr.show_owner || ov_format == fmt_simple) ? adns_qf_owner : 0) |
+ (ov_qc_query ? adns_qf_quoteok_query : 0) |
+ (ov_qc_anshost ? adns_qf_quoteok_anshost : 0) |
+ (ov_qc_cname ? 0 : adns_qf_quoteok_cname) |
+ (ov_v6map ? adns_qf_ipv6_mapv4 : 0) |
+ ov_cname;
+
+ *qun_r= qun;
+}
+
+static void sockaddr_aton(const char *text, adns_rr_addr *a) {
+ int err;
+
+ a->len= sizeof(a->addr);
+ err= adns_text2addr(text,0,adns_qf_addrlit_scope_forbid,
+ &a->addr.sa,&a->len);
+ if (err == EINVAL) usageerr("invalid IP address %s",text);
+ else if (err) sysfail("adns_text2addr",err);
+}
+void of_ptr(const struct optioninfo *oi, const char *arg, const char *arg2) {
+ struct query_node *qun;
+ int quflags, r;
+ adns_rr_addr a;
+
+ sockaddr_aton(arg,&a);
+ prep_query(&qun,&quflags);
+ qun->owner= xstrsave(arg);
+ r= adns_submit_reverse(ads, &a.addr.sa,
+ ov_type == adns_r_none ? adns_r_ptr : ov_type,
+ quflags,
+ qun,
+ &qun->qu);
+ if (r) sysfail("adns_submit_reverse",r);
+
+ LIST_LINK_TAIL(outstanding,qun);
+}
+
+void of_reverse(const struct optioninfo *oi, const char *arg, const char *arg2) {
+ struct query_node *qun;
+ int quflags, r;
+ adns_rr_addr a;
+
+ sockaddr_aton(arg,&a);
+ prep_query(&qun,&quflags);
+ qun->owner= xmalloc(strlen(arg) + strlen(arg2) + 2);
+ sprintf(qun->owner, "%s %s", arg,arg2);
+ r= adns_submit_reverse_any(ads, &a.addr.sa,arg2,
+ ov_type == adns_r_none ? adns_r_txt : ov_type,
+ quflags,
+ qun,
+ &qun->qu);
+ if (r) sysfail("adns_submit_reverse",r);
+
+ LIST_LINK_TAIL(outstanding,qun);
+}
+
+void query_do(const char *domain) {
+ struct query_node *qun;
+ int quflags, r;
+
+ prep_query(&qun,&quflags);
+ qun->owner= xstrsave(domain);
r= adns_submit(ads, domain,
ov_type == adns_r_none ? adns_r_addr : ov_type,
- (ov_search ? adns_qf_search : 0) |
- (ov_tcp ? adns_qf_usevc : 0) |
- (ov_pqfr.show_owner ? adns_qf_owner : 0) |
- (ov_qc_query ? adns_qf_quoteok_query : 0) |
- (ov_qc_anshost ? adns_qf_quoteok_anshost : 0) |
- (ov_qc_cname ? 0 : adns_qf_quoteok_cname) |
- ov_cname,
+ quflags,
qun,
&qun->qu);
if (r) sysfail("adns_submit",r);
LIST_LINK_TAIL(outstanding,qun);
}
-void of_asynch_id(const struct optioninfo *oi, const char *arg) { abort(); }
-void of_cancel_id(const struct optioninfo *oi, const char *arg) { abort(); }
+static void dequeue_query(struct query_node *qun) {
+ LIST_UNLINK(outstanding,qun);
+ free(qun->id);
+ free(qun->owner);
+ free(qun);
+}
+
+static void print_withspace(const char *str) {
+ if (printf("%s ", str) == EOF) outerr();
+}
+
+static void print_ttl(struct query_node *qun, adns_answer *answer) {
+ unsigned long ttl;
+ time_t now;
+
+ switch (qun->pqfr.ttl) {
+ case tm_none:
+ return;
+ case tm_rel:
+ if (time(&now) == (time_t)-1) sysfail("get current time",errno);
+ ttl= answer->expires < now ? 0 : answer->expires - now;
+ break;
+ case tm_abs:
+ ttl= answer->expires;
+ break;
+ default:
+ abort();
+ }
+ if (printf("%lu ",ttl) == EOF) outerr();
+}
+
+static const char *owner_show(struct query_node *qun, adns_answer *answer) {
+ return answer->owner ? answer->owner : qun->owner;
+}
+
+static void print_owner_ttl(struct query_node *qun, adns_answer *answer) {
+ if (qun->pqfr.show_owner) print_withspace(owner_show(qun,answer));
+ print_ttl(qun,answer);
+}
+
+static void check_status(adns_status st) {
+ static const adns_status statuspoints[]= {
+ adns_s_ok,
+ adns_s_max_localfail, adns_s_max_remotefail, adns_s_max_tempfail,
+ adns_s_max_misconfig, adns_s_max_misquery
+ };
+
+ const adns_status *spp;
+ int minrcode;
+
+ for (minrcode=0, spp=statuspoints;
+ spp < statuspoints + (sizeof(statuspoints)/sizeof(statuspoints[0]));
+ spp++)
+ if (st > *spp) minrcode++;
+ if (rcode < minrcode) rcode= minrcode;
+}
+
+static void print_status(adns_status st, struct query_node *qun, adns_answer *answer) {
+ const char *statustypeabbrev, *statusabbrev, *statusstring;
+
+ statustypeabbrev= adns_errtypeabbrev(st);
+ statusabbrev= adns_errabbrev(st);
+ statusstring= adns_strerror(st);
+ assert(!strchr(statusstring,'"'));
+
+ if (printf("%s %d %s ", statustypeabbrev, st, statusabbrev)
+ == EOF) outerr();
+ print_owner_ttl(qun,answer);
+ if (qun->pqfr.show_cname)
+ print_withspace(answer->cname ? answer->cname : "$");
+ if (printf("\"%s\"\n", statusstring) == EOF) outerr();
+}
+
+static void print_dnsfail(adns_status st, struct query_node *qun, adns_answer *answer) {
+ int r;
+ const char *typename, *statusstring;
+
+ if (ov_format == fmt_inline) {
+ if (fputs("; failed ",stdout) == EOF) outerr();
+ print_status(st,qun,answer);
+ return;
+ }
+ assert(ov_format == fmt_simple);
+ if (st == adns_s_nxdomain) {
+ r= fprintf(stderr,"%s does not exist\n", owner_show(qun,answer));
+ } else {
+ type_info(answer->type, &typename, 0,0);
+ if (st == adns_s_nodata) {
+ r= fprintf(stderr,"%s has no %s record\n", owner_show(qun,answer), typename);
+ } else {
+ statusstring= adns_strerror(st);
+ r= fprintf(stderr,"Error during DNS %s lookup for %s: %s\n",
+ typename, owner_show(qun,answer), statusstring);
+ }
+ }
+ if (r == EOF) sysfail("write error message to stderr",errno);
+}
+
+void query_done(struct query_node *qun, adns_answer *answer) {
+ adns_status st;
+ int rrn, nrrs;
+ const char *rrp, *realowner, *typename;
+ char *datastr;
+
+ st= answer->status;
+ nrrs= answer->nrrs;
+ if (ov_format == fmt_asynch) {
+ check_status(st);
+ if (printf("%s %d ", qun->id, nrrs) == EOF) outerr();
+ print_status(st,qun,answer);
+ } else {
+ if (qun->pqfr.show_cname && answer->cname) {
+ print_owner_ttl(qun,answer);
+ if (qun->pqfr.show_type) print_withspace("CNAME");
+ if (printf("%s\n", answer->cname) == EOF) outerr();
+ }
+ if (st) {
+ check_status(st);
+ print_dnsfail(st,qun,answer);
+ }
+ }
+ if (qun->pqfr.show_owner) {
+ realowner= answer->cname ? answer->cname : owner_show(qun,answer);
+ assert(realowner);
+ } else {
+ realowner= 0;
+ }
+ if (nrrs) {
+ for (rrn=0, rrp = answer->rrs.untyped;
+ rrn < nrrs;
+ rrn++, rrp += answer->rrsz) {
+ if (realowner) print_withspace(realowner);
+ print_ttl(qun,answer);
+ type_info(answer->type,&typename, rrp,&datastr);
+ if (qun->pqfr.show_type) print_withspace(typename);
+ if (printf("%s\n",datastr) == EOF) outerr();
+ free(datastr);
+ }
+ }
+ if (fflush(stdout)) outerr();
+ free(answer);
+ dequeue_query(qun);
+}
+
+void of_asynch_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
+ free(ov_id);
+ ov_id= xstrsave(arg);
+}
+
+void of_cancel_id(const struct optioninfo *oi, const char *arg, const char *arg2) {
+ struct query_node *qun;
+
+ for (qun= outstanding.head;
+ qun && strcmp(qun->id,arg);
+ qun= qun->next);
+ if (!qun) return;
+ adns_cancel(qun->qu);
+ dequeue_query(qun);
+}
~ianmdlvl / adns.git / blobdiff