/*
* adns.h
- * - adns user-visible API (single-threaded, without any locking)
+ * - adns user-visible API
*/
/*
*
* This file is
- * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
+ * Copyright (C) 1997-2000,2003,2006,2014 Ian Jackson
*
* It is part of adns, which is
- * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
- *
+ * Copyright (C) 1997-2000,2003,2006,2014 Ian Jackson
+ * Copyright (C) 1999-2000,2003,2006 Tony Finch
+ * Copyright (C) 1991 Massachusetts Institute of Technology
+ *
* 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
- * the Free Software Foundation; either version 2, or (at your option)
+ * the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
*
* You should have received a copy of the GNU General Public License,
* or the GNU Library General Public License, as appropriate, along
- * with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
+ * with this program; if not, write to the Free Software Foundation.
*
- * $Id$
*/
#ifndef ADNS_H_INCLUDED
#define ADNS_H_INCLUDED
#include <stdio.h>
+#include <stdarg.h>
+#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
+#include <net/if.h>
#ifdef __cplusplus
extern "C" { /* I really dislike this - iwj. */
#endif
+/* Whether to support address families other than IPv4 in responses which use
+ * the `adns_rr_addr' structure. This is a source-compatibility issue: old
+ * clients may not expect to find address families other than AF_INET in
+ * their query results. There's a separate binary compatibility issue to do
+ * with the size of the `adns_rr_addr' structure, but we'll assume you can
+ * cope with that because you have this header file. Define
+ * `ADNS_FEATURE_IPV4ONLY' if you only want to see AF_INET addresses by
+ * default, or `ADNS_FEATURE_MANYAF' to allow multiple address families; the
+ * default is currently to stick with AF_INET only, but this is likely to
+ * change in a later release of ADNS. Note that any adns_qf_want_... flags
+ * in your query are observed: this setting affects only the default address
+ * families.
+ */
+#if !defined(ADNS_FEATURE_IPV4ONLY) && !defined(ADNS_FEATURE_MANYAF)
+# define ADNS_FEATURE_IPV4ONLY
+#elif defined(ADNS_FEATURE_IPV4ONLY) && defined(ADNS_FEATURE_MANYAF)
+# error "Feature flags ADNS_FEATURE_IPV4ONLY and ..._MANYAF are incompatible"
+#endif
+
/* All struct in_addr anywhere in adns are in NETWORK byte order. */
typedef struct adns__state *adns_state;
typedef struct adns__query *adns_query;
-typedef enum {
- 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_logpid= 0x0080, /* include pid in diagnostic output */
- adns_if_noautosys= 0x0010, /* do not make syscalls at every opportunity */
- adns_if_eintr= 0x0020, /* allow _wait and _synchronous to return EINTR */
- adns_if_nosigpipe= 0x0040, /* applic has SIGPIPE set to SIG_IGN, do not protect */
- adns_if_checkc_entex= 0x0100, /* do consistency checks on entry/exit to adns funcs */
- adns_if_checkc_freq= 0x0300 /* do consistency checks very frequently (slow!) */
+typedef enum { /* In general, or together the desired flags: */
+ adns_if_none= 0x0000,/* no flags. nicer than 0 for some compilers */
+ adns_if_noenv= 0x0001,/* do not look at environment */
+ adns_if_noerrprint= 0x0002,/* never print to stderr (_debug overrides) */
+ adns_if_noserverwarn=0x0004,/* do not warn to stderr about duff servers etc */
+ adns_if_debug= 0x0008,/* enable all output to stderr plus debug msgs */
+ adns_if_logpid= 0x0080,/* include pid in diagnostic output */
+ adns_if_noautosys= 0x0010,/* do not make syscalls at every opportunity */
+ adns_if_eintr= 0x0020,/* allow _wait and _synchronous to return EINTR */
+ adns_if_nosigpipe= 0x0040,/* applic has SIGPIPE ignored, do not protect */
+ adns_if_checkc_entex=0x0100,/* consistency checks on entry/exit to adns fns */
+ adns_if_checkc_freq= 0x0300,/* consistency checks very frequently (slow!) */
+
+ adns_if_permit_ipv4= 0x0400,/* allow _addr queries to return IPv4 addresses */
+ adns_if_permit_ipv6= 0x0800,/* allow _addr queries to return IPv6 addresses */
+ adns_if_afmask= 0x0c00,
+ /* These are policy flags, and overridden by the adns_af:... option in
+ * resolv.conf. If the adns_qf_want_... query flags are incompatible with
+ * these settings (in the sense that no address families are permitted at
+ * all) then the query flags take precedence; otherwise only records which
+ * satisfy all of the stated requirements are allowed.
+ */
+ adns__if_sizeforce= 0x7fff,
} adns_initflags;
-typedef enum {
- adns_qf_search= 0x00000001, /* use the searchlist */
- adns_qf_usevc= 0x00000002, /* use a virtual circuit (TCP connection) */
- adns_qf_owner= 0x00000004, /* fill in the owner field in the answer */
- adns_qf_quoteok_query= 0x00000010, /* allow special chars in query domain */
- adns_qf_quoteok_cname= 0x00000000, /* allow ... in CNAME we go via - now default */
- adns_qf_quoteok_anshost= 0x00000040, /* allow ... in things supposed to be hostnames */
- adns_qf_quotefail_cname= 0x00000080, /* refuse if quote-req chars in CNAME we go via */
- adns_qf_cname_loose= 0x00000100, /* allow refs to CNAMEs - without, get _s_cname */
- adns_qf_cname_forbid= 0x00000200, /* don't follow CNAMEs, instead give _s_cname */
- adns__qf_internalmask= 0x0ff00000
+typedef enum { /* In general, or together the desired flags: */
+ adns_qf_none= 0x00000000,/* no flags */
+ adns_qf_search= 0x00000001,/* use the searchlist */
+ adns_qf_usevc= 0x00000002,/* use a virtual circuit (TCP conn) */
+ adns_qf_owner= 0x00000004,/* fill in the owner field in the answer */
+ adns_qf_quoteok_query= 0x00000010,/* allow special chars in query domain */
+ adns_qf_quoteok_cname= 0x00000000,/* ... in CNAME we go via (now default) */
+ adns_qf_quoteok_anshost=0x00000040,/* ... in things supposedly hostnames */
+ adns_qf_quotefail_cname=0x00000080,/* refuse if quote-req chars in CNAME we go via */
+ adns_qf_cname_loose= 0x00000100,/* allow refs to CNAMEs - without, get _s_cname */
+ adns_qf_cname_strict= 0x00010000,/* forbid CNAME refs (default, currently) */
+ adns_qf_cname_forbid= 0x00000200,/* don't follow CNAMEs, instead give _s_cname */
+
+ adns_qf_want_ipv4= 0x00000400,/* try to return IPv4 addresses */
+ adns_qf_want_ipv6= 0x00000800,/* try to return IPv6 addresses */
+ adns_qf_want_allaf= 0x00000c00,/* all the above flag bits */
+ /* Without any of the _qf_want_... flags, _qtf_deref queries try to return
+ * all address families permitted by _if_permit_... (as overridden by the
+ * `adns_af:...' configuration option). Set flags to restrict the
+ * returned address families to the ones selected.
+ */
+ adns_qf_ipv6_mapv4= 0x00001000,/* ... return IPv4 addresses as v6-mapped */
+
+ adns_qf_addrlit_scope_forbid=0x00002000,/* forbid %<scope> in IPv6 literals */
+ adns_qf_addrlit_scope_numeric=0x00004000,/* %<scope> may only be numeric */
+ adns_qf_addrlit_ipv4_quadonly=0x00008000,/* reject non-dotted-quad ipv4 */
+
+ adns__qf_internalmask= 0x0ff00000,
+ adns__qf_sizeforce= 0x7fffffff
} adns_queryflags;
typedef enum {
- adns__rrt_typemask= 0x0ffff,
- adns__qtf_deref= 0x10000, /* dereference domains and perhaps produce extra data */
- adns__qtf_mail822= 0x20000, /* make mailboxes be in RFC822 rcpt field format */
-
- adns_r_none= 0,
-
- adns_r_a= 1,
-
- adns_r_ns_raw= 2,
- adns_r_ns= adns_r_ns_raw|adns__qtf_deref,
-
- adns_r_cname= 5,
-
- adns_r_soa_raw= 6,
- adns_r_soa= adns_r_soa_raw|adns__qtf_mail822,
-
- adns_r_ptr_raw= 12,
- adns_r_ptr= adns_r_ptr_raw|adns__qtf_deref,
-
- adns_r_hinfo= 13,
-
- adns_r_mx_raw= 15,
- adns_r_mx= adns_r_mx_raw|adns__qtf_deref,
-
- adns_r_txt= 16,
-
- adns_r_rp_raw= 17,
- adns_r_rp= adns_r_rp_raw|adns__qtf_mail822,
-
- adns_r_addr= adns_r_a|adns__qtf_deref
-
+ adns_rrt_typemask= 0x0ffff,
+ adns_rrt_reprmask= 0xffffff,
+ adns__qtf_deref_bit=0x10000,/* internal version of ..._deref below */
+ adns__qtf_mail822= 0x20000,/* return mailboxes in RFC822 rcpt field fmt */
+
+ adns__qtf_bigaddr=0x1000000,/* use the new larger sockaddr union */
+ adns__qtf_manyaf= 0x2000000,/* permitted to return multiple address families */
+
+ adns__qtf_deref= adns__qtf_deref_bit|adns__qtf_bigaddr
+#ifdef ADNS_FEATURE_MANYAF
+ |adns__qtf_manyaf
+#endif
+ ,/* dereference domains; perhaps get extra data */
+
+ adns_r_unknown= 0x40000,
+ /* To use this, ask for records of type <rr-type-code>|adns_r_unknown.
+ * adns will not process the RDATA - you'll get adns_rr_byteblocks,
+ * where the int is the length and the unsigned char* points to the
+ * data. String representation of the RR data (by adns_rrinfo) is as in
+ * RFC3597. adns_rr_info will not return the type name in *rrtname_r
+ * (due to memory management problems); *fmtname_r will be set to
+ * "unknown".
+ *
+ * Do not specify adns_r_unknown along with a known RR type which
+ * requires domain name uncompression (see RFC3597 s4); domain names
+ * will not be uncompressed and the resulting data would be useless.
+ * Asking for meta-RR types via adns_r_unknown will not work properly
+ * either and may make adns complain about server misbehaviour, so don't
+ * do that.
+ *
+ * Don't forget adns_qf_quoteok if that's what you want. */
+
+ adns_r_none= 0,
+
+ adns_r_a= 1,
+
+ adns_r_ns_raw= 2,
+ adns_r_ns= adns_r_ns_raw|adns__qtf_deref,
+
+ adns_r_cname= 5,
+
+ adns_r_soa_raw= 6,
+ adns_r_soa= adns_r_soa_raw|adns__qtf_mail822,
+
+ adns_r_ptr_raw= 12, /* do not mind PTR with wrong or missing addr */
+ adns_r_ptr= adns_r_ptr_raw|adns__qtf_deref,
+
+ adns_r_hinfo= 13,
+
+ adns_r_mx_raw= 15,
+ adns_r_mx= adns_r_mx_raw|adns__qtf_deref,
+
+ adns_r_txt= 16,
+
+ adns_r_rp_raw= 17,
+ adns_r_rp= adns_r_rp_raw|adns__qtf_mail822,
+
+ adns_r_aaaa= 28,
+
+ /* For SRV records, query domain without _qf_quoteok_query must look
+ * as expected from SRV RFC with hostname-like Name. _With_
+ * _quoteok_query, any query domain is allowed. */
+ adns_r_srv_raw= 33,
+ adns_r_srv= adns_r_srv_raw|adns__qtf_deref,
+
+ adns_r_addr= adns_r_a|adns__qtf_deref,
+
+ adns__rrt_sizeforce= 0x7fffffff,
+
} adns_rrtype;
/*
*
* adns will reject local parts containing control characters (byte
* values 0-31, 127-159, and 255) - these appear to be legal according
- * to RFC822 but are clearly a bad idea. RFC1035 syntax does not make
- * any distinction between a single RFC822 quoted-string containing
- * full stops, and a series of quoted-strings separated by full stops;
- * adns will return anything that isn't all valid atoms as a single
- * quoted-string. RFC822 does not allow high-bit-set characters at
- * all, but adns does allow them in local-parts, treating them as
- * needing quoting.
+ * to RFC822 (at least 0-127) but are clearly a bad idea. RFC1035
+ * syntax does not make any distinction between a single RFC822
+ * quoted-string containing full stops, and a series of quoted-strings
+ * separated by full stops; adns will return anything that isn't all
+ * valid atoms as a single quoted-string. RFC822 does not allow
+ * high-bit-set characters at all, but adns does allow them in
+ * local-parts, treating them as needing quoting.
*
* If you ask for the domain with _raw then _no_ checking is done
* (even on the host part, regardless of adns_qf_quoteok_anshost), and
* you just get the domain name in master file format.
*
* If no mailbox is supplied the returned string will be `.' in either
- * caswe.
+ * case.
*/
typedef enum {
- adns_s_ok,
-
- /* locally induced errors */
- adns_s_nomemory,
- adns_s_unknownrrtype,
- adns_s_systemfail,
-
- adns_s_max_localfail= 29,
-
- /* remotely induced errors, detected locally */
- adns_s_timeout,
- adns_s_allservfail,
- adns_s_norecurse,
- adns_s_invalidresponse,
- adns_s_unknownformat,
-
- adns_s_max_remotefail= 59,
-
- /* remotely induced errors, reported by remote server to us */
- adns_s_rcodeservfail,
- adns_s_rcodeformaterror,
- adns_s_rcodenotimplemented,
- adns_s_rcoderefused,
- adns_s_rcodeunknown,
-
- adns_s_max_tempfail= 99,
-
- /* remote configuration errors */
- adns_s_inconsistent, /* PTR gives domain whose A does not exist and match */
- adns_s_prohibitedcname, /* CNAME found where eg A expected (not if _qf_loosecname) */
- adns_s_answerdomaininvalid,
- adns_s_answerdomaintoolong,
- adns_s_invaliddata,
-
- adns_s_max_misconfig= 199,
-
- /* permanent problems with the query */
- adns_s_querydomainwrong,
- adns_s_querydomaininvalid,
- adns_s_querydomaintoolong,
-
- adns_s_max_misquery= 299,
-
- /* permanent errors */
- adns_s_nxdomain,
- adns_s_nodata,
-
- adns_s_max_permfail= 499
-
+ adns_s_ok,
+
+ /* locally induced errors */
+ adns_s_nomemory,
+ adns_s_unknownrrtype,
+ adns_s_systemfail,
+
+ adns_s_max_localfail= 29,
+
+ /* remotely induced errors, detected locally */
+ adns_s_timeout,
+ adns_s_allservfail,
+ adns_s_norecurse,
+ adns_s_invalidresponse,
+ adns_s_unknownformat,
+
+ adns_s_max_remotefail= 59,
+
+ /* remotely induced errors, reported by remote server to us */
+ adns_s_rcodeservfail,
+ adns_s_rcodeformaterror,
+ adns_s_rcodenotimplemented,
+ adns_s_rcoderefused,
+ adns_s_rcodeunknown,
+
+ adns_s_max_tempfail= 99,
+
+ /* remote configuration errors */
+ adns_s_inconsistent, /* PTR gives domain whose addr is missing or mismatch */
+ adns_s_prohibitedcname, /* CNAME, but eg A expected (not if _qf_cname_loose) */
+ adns_s_answerdomaininvalid,
+ adns_s_answerdomaintoolong,
+ adns_s_invaliddata,
+
+ adns_s_max_misconfig= 199,
+
+ /* permanent problems with the query */
+ adns_s_querydomainwrong,
+ adns_s_querydomaininvalid,
+ adns_s_querydomaintoolong,
+
+ adns_s_max_misquery= 299,
+
+ /* permanent errors */
+ adns_s_nxdomain,
+ adns_s_nodata,
+
+ adns_s_max_permfail= 499
+
} adns_status;
+typedef union {
+ struct sockaddr sa;
+ struct sockaddr_in inet;
+} adns_sockaddr_v4only;
+
+typedef union {
+ struct sockaddr sa;
+ struct sockaddr_in inet;
+ struct sockaddr_in6 inet6;
+} adns_sockaddr;
+
typedef struct {
int len;
- union {
- struct sockaddr sa;
- struct sockaddr_in inet;
- } addr;
+ adns_sockaddr addr;
} adns_rr_addr;
+typedef struct {
+ /* the old v4-only structure; handy if you have complicated binary
+ * compatibility problems. */
+ int len;
+ adns_sockaddr_v4only addr;
+} adns_rr_addr_v4only;
+
typedef struct {
char *host;
adns_status astatus;
} adns_rr_inthostaddr;
typedef struct {
- /* Used both for mx_raw, in which case i is the preference and str the domain,
- * and for txt, in which case each entry has i for the `text' length,
- * and str for the data (which will have had an extra nul appended
- * so that if it was plain text it is now a null-terminated string).
+ /* Used both for mx_raw, in which case i is the preference and str
+ * the domain, and for txt, in which case each entry has i for the
+ * `text' length, and str for the data (which will have had an extra
+ * nul appended so that if it was plain text it is now a
+ * null-terminated string).
*/
int i;
char *str;
unsigned long serial, refresh, retry, expire, minimum;
} adns_rr_soa;
+typedef struct {
+ int priority, weight, port;
+ char *host;
+} adns_rr_srvraw;
+
+typedef struct {
+ int priority, weight, port;
+ adns_rr_hostaddr ha;
+} adns_rr_srvha;
+
+typedef struct {
+ int len;
+ unsigned char *data;
+} adns_rr_byteblock;
+
typedef struct {
adns_status status;
char *cname; /* always NULL if query was for CNAME records */
- char *owner; /* only set if requested in query flags, and may be 0 on error anyway */
+ char *owner; /* only set if req'd in query flags; maybe 0 on error anyway */
adns_rrtype type; /* guaranteed to be same as in query */
- time_t expires; /* expiry time, defined only if _s_ok, nxdomain or nodata. NOT TTL! */
+ time_t expires;/*abs time. def only if _s_ok, nxdomain or nodata. NOT TTL!*/
int nrrs, rrsz; /* nrrs is 0 if an error occurs */
union {
void *untyped;
unsigned char *bytes;
- char *(*str); /* ns_raw, cname, ptr, ptr_raw */
- adns_rr_intstr *(*manyistr); /* txt (list of strings ends with i=-1, str=0) */
- adns_rr_addr *addr; /* addr */
- struct in_addr *inaddr; /* a */
- adns_rr_hostaddr *hostaddr; /* ns */
- adns_rr_intstrpair *intstrpair; /* hinfo */
- adns_rr_strpair *strpair; /* rp, rp_raw */
- adns_rr_inthostaddr *inthostaddr; /* mx */
- adns_rr_intstr *intstr; /* mx_raw */
- adns_rr_soa *soa; /* soa, soa_raw */
+ char *(*str); /* ns_raw, cname, ptr, ptr_raw */
+ adns_rr_intstr *(*manyistr); /* txt (list strs ends with i=-1, str=0)*/
+ adns_rr_addr *addr; /* addr */
+ struct in_addr *inaddr; /* a */
+ struct in6_addr *in6addr; /* aaaa */
+ adns_rr_hostaddr *hostaddr; /* ns */
+ adns_rr_intstrpair *intstrpair; /* hinfo */
+ adns_rr_strpair *strpair; /* rp, rp_raw */
+ adns_rr_inthostaddr *inthostaddr;/* mx */
+ adns_rr_intstr *intstr; /* mx_raw */
+ adns_rr_soa *soa; /* soa, soa_raw */
+ adns_rr_srvraw *srvraw; /* srv_raw */
+ adns_rr_srvha *srvha;/* srv */
+ adns_rr_byteblock *byteblock; /* ...|unknown */
} rrs;
} adns_answer;
*
* For _init, _init_strcfg, _submit and _synchronous, system errors
* (eg, failure to create sockets, malloc failure, etc.) return errno
- * values.
+ * values. EINVAL from _init et al means the configuration file
+ * is erroneous and cannot be parsed.
*
* For _wait and _check failures are reported in the answer
* structure, and only 0, ESRCH or (for _check) EAGAIN is
* requested.
*/
+/* Threads:
+ * adns does not use any static modifiable state, so it
+ * is safe to call adns_init several times and then use the
+ * resulting adns_states concurrently.
+ * However, it is NOT safe to make simultaneous calls into
+ * adns using the same adns_state; a single adns_state must be used
+ * only by one thread at a time. You can solve this problem by
+ * having one adns_state per thread, or if that isn't feasible, you
+ * could maintain a pool of adns_states. Unfortunately neither of
+ * these approaches has optimal performance.
+ */
+
int adns_init(adns_state *newstate_r, adns_initflags flags,
FILE *diagfile /*0=>stderr*/);
int adns_init_strcfg(adns_state *newstate_r, adns_initflags flags,
FILE *diagfile /*0=>discard*/, const char *configtext);
+typedef void adns_logcallbackfn(adns_state ads, void *logfndata,
+ const char *fmt, va_list al);
+ /* Will be called perhaps several times for each message; when the
+ * message is complete, the string implied by fmt and al will end in
+ * a newline. Log messages start with `adns debug:' or `adns
+ * warning:' or `adns:' (for errors), or `adns debug [PID]:'
+ * etc. if adns_if_logpid is set. */
+
+int adns_init_logfn(adns_state *newstate_r, adns_initflags flags,
+ const char *configtext /*0=>use default config files*/,
+ adns_logcallbackfn *logfn /*0=>logfndata is a FILE* */,
+ void *logfndata /*0 with logfn==0 => discard*/);
+
/* Configuration:
* adns_init reads /etc/resolv.conf, which is expected to be (broadly
* speaking) in the format expected by libresolv, and then
* Changes the consistency checking frequency; this overrides the
* setting of adns_if_check_entex, adns_if_check_freq, or neither,
* in the flags passed to adns_init.
+ *
+ * adns_af:{ipv4,ipv6},... adns_af:any
+ * Determines which address families ADNS looks up (either as an
+ * adns_r_addr query, or when dereferencing an answer yielding hostnames
+ * (e.g., adns_r_mx). The argument is a comma-separated list: only the
+ * address families listed will be looked up. The default is `any'.
+ * Lookups occur (logically) concurrently; use the `sortlist' directive to
+ * control the relative order of addresses in answers. This option
+ * overrides the corresponding init flags (covered by adns_if_afmask).
*
* There are a number of environment variables which can modify the
* behaviour of adns. They take effect only if adns_init is used, and
* they will be cancelled.
*/
+#define ADNS_ADDR2TEXT_BUFLEN \
+ (INET6_ADDRSTRLEN + 1/*%*/ \
+ + ((IF_NAMESIZE-1) > 9 ? (IF_NAMESIZE-1) : 9/*uint32*/) \
+ + 1/* nul; included in IF_NAMESIZE */)
+
+int adns_text2addr(const char *text, uint16_t port, adns_queryflags flags,
+ struct sockaddr *sa_r,
+ socklen_t *salen_io /* updated iff OK or ENOSPC */);
+int adns_addr2text(const struct sockaddr *sa, adns_queryflags flags,
+ char *buffer, int *buflen_io /* updated ONLY on ENOSPC */,
+ int *port_r /* may be 0 */);
+ /*
+ * port is always in host byte order and is simply copied to and
+ * from the appropriate sockaddr field (byteswapped as necessary).
+ *
+ * The only flags supported are adns_qf_addrlit_...
+ *
+ * Error return values are:
+ *
+ * ENOSPC Output buffer is too small. Can only happen if
+ * *buflen_io < ADNS_ADDR2TEXT_BUFLEN or
+ * *salen_io < sizeof(adns_sockaddr). On return,
+ * *buflen_io or *salen_io has been updated by adns.
+ *
+ * EINVAL text has invalid syntax.
+ *
+ * text represents an address family not supported by
+ * this version of adns.
+ *
+ * Scoped address supplied (text contained "%" or
+ * sin6_scope_id nonzero) but caller specified
+ * adns_qf_addrlit_scope_forbid.
+ *
+ * Scope name (rather than number) supplied in text but
+ * caller specified adns_qf_addrlit_scope_numeric.
+ *
+ * EAFNOSUPPORT sa->sa_family is not supported (addr2text only).
+ *
+ * ENOSYS Unsupported flags set.
+ *
+ * Only if neither adns_qf_addrlit_scope_forbid nor
+ * adns_qf_addrlit_scope_numeric are set:
+ *
+ * ENOSYS Scope name supplied in text but IPv6 address part of
+ * sockaddr is not a link local address.
+ *
+ * ENXIO Scope name supplied in text but if_nametoindex
+ * said it wasn't a valid local interface name.
+ *
+ * EIO Scoped address supplied but if_nametoindex failed
+ * in an unexpected way; adns has printed a message to
+ * stderr.
+ *
+ * any other if_nametoindex failed in a more-or-less expected way.
+ */
void adns_forallqueries_begin(adns_state ads);
adns_query adns_forallqueries_next(adns_state ads, void **context_r);
* for adns_firsttimeout. readfds, writefds, exceptfds and maxfd_io may
* not be 0.
*
- * If now is not 0 then this will never actually do any I/O, or change
- * the fds that adns is using or the timeouts it wants. In any case
- * it won't block, and it will set the timeout to zero if a query
- * finishes in _beforeselect.
+ * If tv_mod is 0 on entry then this will never actually do any I/O,
+ * or change the fds that adns is using or the timeouts it wants. In
+ * any case it won't block, and it will set the timeout to zero if a
+ * query finishes in _beforeselect.
*/
void adns_afterselect(adns_state ads, int maxfd, const fd_set *readfds,
* entrypoints will not be defined in libadns. Sorry !
*/
-int adns_beforepoll(adns_state ads, struct pollfd *fds, int *nfds_io, int *timeout_io,
+int adns_beforepoll(adns_state ads, struct pollfd *fds,
+ int *nfds_io, int *timeout_io,
const struct timeval *now);
/* Finds out which fd's adns is interested in, and when it would like
* to be able to time things out. This is in a form suitable for use
* In any case this call won't block.
*/
-#define ADNS_POLLFDS_RECOMMENDED 2
+#define ADNS_POLLFDS_RECOMMENDED 3
/* If you allocate an fds buf with at least RECOMMENDED entries then
* you are unlikely to need to enlarge it. You are recommended to do
* so if it's convenient. However, you must be prepared for adns to
~mdw / adns / blobdiff