-/**/
+/*
+ * Copyright (C)1998 Ian Jackson.
+ * This version provided for review and comment only.
+ *
+ * $Id$
+ */
#ifndef ADNS_H_INCLUDED
#define ADNS_H_INCLUDED
+#include <stdio.h>
+
#include <sys/socket.h>
#include <netinet/in.h>
adns_if_noenv= 0x0001, /* do not look at environment */
adns_if_noerrprint= 0x0002, /* never print output to stderr (_debug overrides) */
adns_if_noserverwarn= 0x0004, /* do not warn to stderr about duff nameservers etc */
- adns_if_debug= 0x0008, /* enable all output to stderr plus debug msgs*/
+ adns_if_debug= 0x0008, /* enable all output to stderr plus debug msgs */
adns_if_noautosys= 0x0010, /* do not make syscalls at every opportunity */
} adns_initflags;
typedef enum {
- adns_f_search= 0x0001, /* use the searchlist */
- adns_f_usevc= 0x0002, /* use a virtual circuit (TCP connection) */
- adns_f_anyquote= 0x0004,
+ adns_qf_search= 0x0001, /* use the searchlist */
+ adns_qf_usevc= 0x0002, /* use a virtual circuit (TCP connection) */
+ adns_qf_anyquote= 0x0004,
+ adns_qf_loosecname= 0x0008, /* allow refs to CNAMEs - without, get _s_cname */
+ adns_qf_nocname= 0x0010, /* don't follow CNAMEs, instead give _s_cname */
} adns_queryflags;
typedef enum {
adns__rrt_typemask= 0x0ffff,
- adns__qtf_deref= 0x10000, /* dereference domains and produce extra data */
- adns__qtf_mailconv= 0x20000, /* put @ between first and second labels */
+ adns__qtf_deref= 0x10000, /* dereference domains and perhaps produce extra data */
+ adns__qtf_mail822= 0x20000, /* make mailboxes be in RFC822 rcpt field format */
+ adns__qtf_masterfmt= 0x80000, /* convert RRs to master file format, return as str */
+
adns_r_none= 0,
+
adns_r_a= 1,
+ adns_r_a_mf= adns_r_a|adns__qtf_masterfmt,
+
adns_r_ns_raw= 2,
adns_r_ns= adns_r_ns_raw|adns__qtf_deref,
+ adns_r_ns_mf= adns_r_ns_raw|adns__qtf_masterfmt,
+
adns_r_cname= 5,
+ adns_r_cname_mf= adns_r_cname|adns__qtf_masterfmt,
+
adns_r_soa_raw= 6,
- adns_r_soa= adns_r_soa_raw|adns__qtf_mailconv,
+ adns_r_soa= adns_r_soa_raw|adns__qtf_mail822,
+ adns_r_soa_mf= adns_r_soa_raw|adns__qtf_masterfmt,
+
adns_r_null= 10,
+ adns_r_null_mf= adns_r_null|adns__qtf_masterfmt,
+
adns_r_ptr_raw= 12,
adns_r_ptr= adns_r_ptr_raw|adns__qtf_deref,
+ adns_r_ptr_mf= adns_r_ptr_raw|adns__qtf_masterfmt,
+
adns_r_hinfo= 13,
+ adns_r_hinfo_mf= adns_r_hinfo|adns__qtf_masterfmt,
+
adns_r_mx_raw= 15,
adns_r_mx= adns_r_mx_raw|adns__qtf_deref,
+ adns_r_mx_mf= adns_r_mx_raw|adns__qtf_masterfmt,
+
adns_r_txt= 16,
+ adns_r_txt_mf= adns_r_txt|adns__qtf_masterfmt,
+
adns_r_rp_raw= 17,
- adns_r_rp= adns_r_rp_raw|adns__qtf_mailconv
+ adns_r_rp= adns_r_rp_raw|adns__qtf_mail822,
+ adns_r_rp_mf= adns_r_rp_raw|adns__qtf_masterfmt
+
} adns_rrtype;
/* In queries without qtf_anyquote, all domains must have standard
* not usually legal in domain names will be quoted as \X
* (if the character is 33-126 except \ and ") or \DDD.
*
- * Do not ask for records containing mailboxes without
- * specifying qtf_mailconv or qtf_anyquote.
+ * _qtf_anyquote is ignored for _mf queries.
+ *
+ * Do not ask for _raw records containing mailboxes without
+ * specifying _qf_anyquote.
*/
typedef enum {
adns_s_ok,
adns_s_timeout,
- adns_s_unknownqtype,
adns_s_nolocalmem,
- adns_s_connlost,
adns_s_allservfail,
+ adns_s_servfail,
+ adns_s_notimplemented,
+ adns_s_refused,
+ adns_s_reasonunknown,
+ adns_s_norecurse,
+ adns_s_serverfaulty,
+ adns_s_unknownreply,
+ adns_s_invaliddata,
adns_s_max_tempfail= 99,
adns_s_inconsistent, /* PTR gives domain whose A does not match */
- adns_s_badcname, /* CNAME found where actual record expected */
- adns_s_max_misconfig= 199;
+ adns_s_cname, /* CNAME found where data eg A expected (not if _qf_loosecname) */
+ /* fixme: implement _s_cname */
+ adns_s_max_remotemisconfig= 199,
adns_s_nxdomain,
- adns_s_norecord,
- adns_s_invaliddomain
+ adns_s_nodata,
+ adns_s_invaliddomain,
+ adns_s_domaintoolong,
} adns_status;
typedef struct {
adns_status astatus;
int naddrs; /* temp fail => -1, perm fail => 0, s_ok => >0 */
struct in_addr *addrs;
-} adns_dmaddr;
+} adns_rr_dmaddr;
+
+typedef struct {
+ char *a, *b;
+} adns_rr_strpair;
+
+typedef struct {
+ int i;
+ adns_rr_dmaddr dmaddr;
+} adns_rr_intdmaddr;
+
+typedef struct {
+ int i;
+ char *str;
+} adns_rr_intstr;
+
+typedef struct {
+ char *ns0, *rp;
+ unsigned long serial, refresh, retry, expire, minimum;
+} adns_rr_soa;
typedef struct {
adns_status status;
char *cname; /* always NULL if query was for CNAME records */
adns_rrtype type;
- int nrrs;
+ int nrrs, rrsz;
union {
- struct in_addr inaddr[1]; /* a */
- char (*str)[1]; /* ns_raw, cname, ptr, ptr_raw, txt */
- adns_dmaddr dmaddr[1]; /* ns */
- struct { char *a, *b; } strpair[1]; /* hinfo, rp, rp_raw */
- struct { int pref; adns_dmaddrs dmaddr; } intdmaddr[1]; /* mx */
- struct { int pref; char *str; } intstr[1]; /* mx_raw */
- struct {
- char *ns0, *rp;
- unsigned long serial, refresh, retry, expire, minimum;
- } soa[1]; /* soa, soa_raw */
+ void *untyped;
+ unsigned char *bytes;
+ char *(*str); /* ns_raw, cname, ptr, ptr_raw, txt, <any>_mf */
+ struct in_addr *inaddr; /* a */
+ adns_rr_dmaddr *dmaddr; /* ns */
+ adns_rr_strpair *strpair; /* hinfo, rp, rp_raw */
+ adns_rr_intdmaddr *intdmaddr; /* mx */
+ adns_rr_intstr *intstr; /* mx_raw */
+ adns_rr_soa *soa; /* soa, soa_raw */
/* NULL is empty */
} rrs;
} adns_answer;
/* Memory management:
* adns_state and adns_query are actually pointers to malloc'd state;
* On submission questions are copied, including the owner domain;
- * Answers are malloc'd as a single piece of memory.
+ * Answers are malloc'd as a single piece of memory; pointers in the
+ * answer struct point into further memory in the answer.
* query_io:
* Must always be non-null pointer;
* If *query_io is 0 to start with then any query may be returned;
* If *query_io is !0 adns_query then only that query may be returned.
+ * If the call is successful, *query_io, *answer_r, and *context_r
+ * will all be set.
* Errors:
* Return values are 0 or an errno value;
* Seriously fatal system errors (eg, failure to create sockets,
* type will always be the type requested;
* If no (appropriate) requests are done adns_check returns EWOULDBLOCK;
* If no (appropriate) requests are outstanding adns_query and adns_wait return ESRCH;
- * If malloc failure occurs during internal allocation or processing
- * ands_check and _wait set *answer to 0.
*/
int adns_init(adns_state *newstate_r, adns_initflags flags, FILE *diagfile/*0=>stderr*/);
* Other fd's may be in the fd_sets, and will be ignored.
* _callback returns how many adns fd's were in the various sets, so
* you can tell if your select handling code has missed something and is going awol.
+ *
+ * May also return -1 if a critical syscall failed, setting errno.
*/
void adns_interest(adns_state, int *maxfd_io, fd_set *readfds_io,
* }
*/
+const char *adns_strerror(adns_status st);
+
#endif
~ianmdlvl / adns.git / blobdiff