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- /*
- * Copyright (c) 1983, 1987, 1989
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- /*
- * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
- /*
- * @(#)resolv.h 8.1 (Berkeley) 6/2/93
- * $BINDId: resolv.h,v 8.31 2000/03/30 20:16:50 vixie Exp $
- */
- #ifndef _RESOLV_H_
- /* These headers are needed for types used in the `struct res_state'
- declaration. */
- #include <sys/types.h>
- #include <netinet/in.h>
- #ifndef __need_res_state
- # define _RESOLV_H_
- # include <sys/param.h>
- # include <sys/cdefs.h>
- # include <stdio.h>
- # include <arpa/nameser.h>
- #endif
- #ifndef __res_state_defined
- # define __res_state_defined
- typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
- res_sendhookact;
- typedef res_sendhookact (*res_send_qhook) (struct sockaddr_in * const *ns,
- const u_char **query,
- int *querylen,
- u_char *ans,
- int anssiz,
- int *resplen);
- typedef res_sendhookact (*res_send_rhook) (const struct sockaddr_in *ns,
- const u_char *query,
- int querylen,
- u_char *ans,
- int anssiz,
- int *resplen);
- /*
- * Global defines and variables for resolver stub.
- */
- # define MAXNS 3 /* max # name servers we'll track */
- # define MAXDFLSRCH 3 /* # default domain levels to try */
- # define MAXDNSRCH 6 /* max # domains in search path */
- # define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
- # define RES_TIMEOUT 5 /* min. seconds between retries */
- # define MAXRESOLVSORT 10 /* number of net to sort on */
- # define RES_MAXNDOTS 15 /* should reflect bit field size */
- # define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
- # define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
- # define RES_DFLRETRY 3 /* Default #/tries. */
- /* (glibc uses RES_DFLRETRY of 2 but also does _res.retry = 4 sometimes (!) */
- # define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
- /* _res (an instance of this structure) uses 0.5kb in bss
- * in "ordinary" libc's (glibc, xBSD). We want to be less wasteful.
- * We (1) shuffle and shrink some integer fields,
- * and (2) can switch off stuff we don't support.
- * Everything inside __UCLIBC_HAS_COMPAT_RES_STATE__
- * is not actually used by uclibc and can be configured off.
- * However, this will prevent some programs from building.
- * Really obscure stuff with no observed users in the wild is under
- * __UCLIBC_HAS_EXTRA_COMPAT_RES_STATE__.
- * I guess it's safe to set that to N.
- */
- struct __res_state {
- /*int retrans, retry; - moved, was here */
- u_int32_t options; /* (was: ulong) option flags - see below. */
- struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
- #define nsaddr nsaddr_list[0] /* for backward compatibility */
- char *dnsrch[MAXDNSRCH + 1]; /* components of domain to search */
- /*char defdname[256]; - moved, was here */
- u_int8_t nscount; /* (was: int) number of name servers */
- u_int8_t ndots; /* (was: unsigned:4) threshold for initial abs. query */
- u_int8_t retrans; /* (was: int) retransmission time interval */
- u_int8_t retry; /* (was: int) number of times to retransmit */
- #ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
- /* googling for "_res.defdname" says it's still sometimes used.
- * Pity. It's huge, I want to move it to EXTRA_COMPAT... */
- char defdname[256]; /* default domain (deprecated) */
- u_int8_t nsort; /* (was: unsigned:4) number of elements in sort_list[] */
- u_int16_t pfcode; /* (was: ulong) RES_PRF_ flags. Used by dig. */
- unsigned short id; /* current message id */
- int res_h_errno; /* last one set for this context */
- struct {
- struct in_addr addr;
- u_int32_t mask;
- } sort_list[MAXRESOLVSORT];
- #endif
- /* I assume that the intention is to store all
- * DNS servers' addresses here, and duplicate in nsaddr_list[]
- * those which have IPv4 address. In the case of IPv4 address
- * _u._ext.nsaddrs[x] will point to some nsaddr_list[y],
- * otherwise it will point into malloc'ed sockaddr_in6.
- * nscount is the number of IPv4 addresses and _u._ext.nscount
- * is the number of addresses of all kinds.
- *
- * If this differs from established usage and you need
- * to change this, please describe how it is supposed to work.
- */
- union {
- struct {
- #ifdef __UCLIBC_HAS_IPV6__
- struct sockaddr_in6 *nsaddrs[MAXNS];
- #endif
- u_int8_t nscount; /* (was: u_int16_t) */
- #ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
- /* rather obscure, and differs in BSD and glibc */
- u_int16_t nstimes[MAXNS];
- int nssocks[MAXNS];
- u_int16_t nscount6;
- u_int16_t nsinit;
- /* glibc also has: */
- /*u_int16_t nsmap[MAXNS];*/
- /*unsigned long long initstamp;*/
- #endif
- } _ext;
- } _u;
- #ifdef __UCLIBC_HAS_EXTRA_COMPAT_RES_STATE__
- /* Truly obscure stuff.
- * Googling for "_res.XXX" for these members
- * turned up basically empty */
- res_send_qhook qhook; /* query hook */
- res_send_rhook rhook; /* response hook */
- int _vcsock; /* PRIVATE: for res_send VC i/o */
- unsigned _flags; /* PRIVATE: see below */
- #endif
- };
- typedef struct __res_state *res_state;
- # undef __need_res_state
- #endif
- #ifdef _RESOLV_H_
- /*
- * Revision information. This is the release date in YYYYMMDD format.
- * It can change every day so the right thing to do with it is use it
- * in preprocessor commands such as "#if (__RES > 19931104)". Do not
- * compare for equality; rather, use it to determine whether your resolver
- * is new enough to contain a certain feature.
- */
- #if 0
- #define __RES 19991006
- #else
- #define __RES 19960801
- #endif
- /*
- * Resolver configuration file.
- * Normally not present, but may contain the address of the
- * inital name server(s) to query and the domain search list.
- */
- #ifndef _PATH_RESCONF
- #define _PATH_RESCONF "/etc/resolv.conf"
- #endif
- struct res_sym {
- int number; /* Identifying number, like T_MX */
- char * name; /* Its symbolic name, like "MX" */
- char * humanname; /* Its fun name, like "mail exchanger" */
- };
- /*
- * Resolver flags (used to be discrete per-module statics ints).
- */
- #define RES_F_VC 0x00000001 /* socket is TCP */
- #define RES_F_CONN 0x00000002 /* socket is connected */
- /* res_findzonecut() options */
- #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */
- /*
- * Resolver options (keep these in synch with res_debug.c, please)
- * (which of these do we really implement??)
- */
- #define RES_INIT 0x00000001 /* address initialized */
- #define RES_DEBUG 0x00000002 /* print debug messages */
- #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
- #define RES_USEVC 0x00000008 /* use virtual circuit */
- #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
- #define RES_IGNTC 0x00000020 /* ignore trucation errors */
- #define RES_RECURSE 0x00000040 /* recursion desired */
- #define RES_DEFNAMES 0x00000080 /* use default domain name */
- #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
- #define RES_DNSRCH 0x00000200 /* search up local domain tree */
- #define RES_INSECURE1 0x00000400 /* type 1 security disabled */
- #define RES_INSECURE2 0x00000800 /* type 2 security disabled */
- #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
- #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
- #define RES_ROTATE 0x00004000 /* rotate ns list after each query */
- #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */
- #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */
- #define RES_BLAST 0x00020000 /* blast all recursive servers */
- #if 0
- #define RES_USEBSTRING 0x00040000 /* IPv6 reverse lookup with byte
- strings */
- #define RES_NOIP6DOTINT 0x00080000 /* Do not use .ip6.int in IPv6
- reverse lookup */
- #define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH|RES_NOIP6DOTINT)
- #else
- #define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH)
- #endif
- /*
- * Resolver "pfcode" values. Used by dig.
- */
- #define RES_PRF_STATS 0x00000001
- #define RES_PRF_UPDATE 0x00000002
- #define RES_PRF_CLASS 0x00000004
- #define RES_PRF_CMD 0x00000008
- #define RES_PRF_QUES 0x00000010
- #define RES_PRF_ANS 0x00000020
- #define RES_PRF_AUTH 0x00000040
- #define RES_PRF_ADD 0x00000080
- #define RES_PRF_HEAD1 0x00000100
- #define RES_PRF_HEAD2 0x00000200
- #define RES_PRF_TTLID 0x00000400
- #define RES_PRF_HEADX 0x00000800
- #define RES_PRF_QUERY 0x00001000
- #define RES_PRF_REPLY 0x00002000
- #define RES_PRF_INIT 0x00004000
- /* 0x00008000 */
- /* Things involving an internal (static) resolver context. */
- __BEGIN_DECLS
- extern struct __res_state *__res_state(void) __attribute__ ((__const__));
- __END_DECLS
- #define _res (*__res_state())
- #if 0
- #define fp_nquery __fp_nquery
- #define fp_query __fp_query
- #define hostalias __hostalias
- #define p_query __p_query
- #endif
- #define res_close __res_close
- #define res_init __res_init
- #if 0
- #define res_isourserver __res_isourserver
- #endif
- #define res_mkquery __res_mkquery
- #define res_query __res_query
- #define res_querydomain __res_querydomain
- #define res_search __res_search
- #if 0
- #define res_send __res_send
- #endif
- __BEGIN_DECLS
- #if 0
- void fp_nquery (const u_char *, int, FILE *) __THROW;
- void fp_query (const u_char *, FILE *) __THROW;
- const char * hostalias (const char *) __THROW;
- void p_query (const u_char *) __THROW;
- #endif
- #ifdef __UCLIBC_HAS_BSD_RES_CLOSE__
- void res_close (void) __THROW;
- #endif
- int res_init (void) __THROW;
- libc_hidden_proto(res_init)
- #if 0
- int res_isourserver (const struct sockaddr_in *) __THROW;
- #endif
- int res_mkquery (int, const char *, int, int, const u_char *,
- int, const u_char *, u_char *, int) __THROW;
- int res_query (const char *, int, int, u_char *, int) __THROW;
- libc_hidden_proto(res_query)
- int res_querydomain (const char *, const char *, int, int,
- u_char *, int) __THROW;
- libc_hidden_proto(res_querydomain)
- int res_search (const char *, int, int, u_char *, int) __THROW;
- #if 0
- int res_send (const u_char *, int, u_char *, int) __THROW;
- #endif
- __END_DECLS
- #ifdef __UCLIBC_HAS_BSD_B64_NTOP_B64_PTON__
- #define b64_ntop __b64_ntop
- #define b64_pton __b64_pton
- #endif
- #if 0
- #define dn_count_labels __dn_count_labels
- #endif
- #define dn_comp __dn_comp
- #define dn_expand __dn_expand
- #define dn_skipname __dn_skipname
- #define res_ninit __res_ninit
- #define res_nclose __res_nclose
- #if 0
- #define fp_resstat __fp_resstat
- #define loc_aton __loc_aton
- #define loc_ntoa __loc_ntoa
- #define p_cdname __p_cdname
- #define p_cdnname __p_cdnname
- #define p_class __p_class
- #define p_fqname __p_fqname
- #define p_fqnname __p_fqnname
- #define p_option __p_option
- #define p_secstodate __p_secstodate
- #define p_section __p_section
- #define p_time __p_time
- #define p_type __p_type
- #define p_rcode __p_rcode
- #define putlong __putlong
- #define putshort __putshort
- #define res_dnok __res_dnok
- #define res_hnok __res_hnok
- #define res_hostalias __res_hostalias
- #define res_mailok __res_mailok
- #define res_nameinquery __res_nameinquery
- #define res_nmkquery __res_nmkquery
- #define res_npquery __res_npquery
- #define res_nquery __res_nquery
- #define res_nquerydomain __res_nquerydomain
- #define res_nsearch __res_nsearch
- #define res_nsend __res_nsend
- #define res_nisourserver __res_nisourserver
- #define res_ownok __res_ownok
- #define res_queriesmatch __res_queriesmatch
- #define res_randomid __res_randomid
- #define sym_ntop __sym_ntop
- #define sym_ntos __sym_ntos
- #define sym_ston __sym_ston
- #endif
- __BEGIN_DECLS
- #if 0
- int res_hnok (const char *) __THROW;
- int res_ownok (const char *) __THROW;
- int res_mailok (const char *) __THROW;
- int res_dnok (const char *) __THROW;
- int sym_ston (const struct res_sym *, const char *, int *) __THROW;
- const char * sym_ntos (const struct res_sym *, int, int *) __THROW;
- const char * sym_ntop (const struct res_sym *, int, int *) __THROW;
- #endif
- #ifdef __UCLIBC_HAS_BSD_B64_NTOP_B64_PTON__
- int b64_ntop (u_char const *, size_t, char *, size_t) __THROW;
- int b64_pton (char const *, u_char *, size_t) __THROW;
- #endif
- #if 0
- int loc_aton (const char *ascii, u_char *binary) __THROW;
- const char * loc_ntoa (const u_char *binary, char *ascii) __THROW;
- void putlong (u_int32_t, u_char *) __THROW;
- void putshort (u_int16_t, u_char *) __THROW;
- const char * p_class (int) __THROW;
- const char * p_time (u_int32_t) __THROW;
- const char * p_type (int) __THROW;
- const char * p_rcode (int) __THROW;
- const u_char * p_cdnname (const u_char *, const u_char *, int, FILE *)
- __THROW;
- const u_char * p_cdname (const u_char *, const u_char *, FILE *) __THROW;
- const u_char * p_fqnname (const u_char *cp, const u_char *msg,
- int, char *, int) __THROW;
- const u_char * p_fqname (const u_char *, const u_char *, FILE *) __THROW;
- const char * p_option (u_long option) __THROW;
- char * p_secstodate (u_long) __THROW;
- int dn_count_labels (const char *) __THROW;
- #endif
- int dn_skipname (const u_char *, const u_char *) __THROW;
- libc_hidden_proto(dn_skipname)
- int dn_comp (const char *, u_char *, int, u_char **, u_char **)
- __THROW;
- libc_hidden_proto(dn_comp)
- int dn_expand (const u_char *, const u_char *, const u_char *,
- char *, int) __THROW;
- libc_hidden_proto(dn_expand)
- int res_ninit (res_state) __THROW;
- void res_nclose (res_state) __THROW;
- #if 0
- u_int res_randomid (void) __THROW;
- int res_nameinquery (const char *, int, int,
- const u_char *, const u_char *) __THROW;
- int res_queriesmatch (const u_char *, const u_char *,
- const u_char *, const u_char *) __THROW;
- const char * p_section (int section, int opcode) __THROW;
- /* Things involving a resolver context. */
- int res_nisourserver (const res_state,
- const struct sockaddr_in *) __THROW;
- void fp_resstat (const res_state, FILE *) __THROW;
- void res_npquery (const res_state, const u_char *, int, FILE *)
- __THROW;
- const char * res_hostalias (const res_state, const char *, char *, size_t)
- __THROW;
- int res_nquery (res_state, const char *, int, int, u_char *, int)
- __THROW;
- int res_nsearch (res_state, const char *, int, int, u_char *, int)
- __THROW;
- int res_nquerydomain (res_state, const char *, const char *, int,
- int, u_char *, int) __THROW;
- int res_nmkquery (res_state, int, const char *, int, int,
- const u_char *, int, const u_char *, u_char *,
- int) __THROW;
- int res_nsend (res_state, const u_char *, int, u_char *, int)
- __THROW;
- #endif
- __END_DECLS
- # if _LIBC
- # ifdef __UCLIBC_HAS_THREADS__
- # if defined __UCLIBC_HAS_TLS__ \
- && (!defined NOT_IN_libc || defined IS_IN_libpthread)
- # undef _res
- # ifndef NOT_IN_libc
- # define __resp __libc_resp
- # endif
- # define _res (*__resp)
- extern __thread struct __res_state *__resp attribute_tls_model_ie;
- # endif
- # else
- # undef _res
- # define _res (*__resp)
- extern struct __res_state *__resp;
- # endif /* __UCLIBC_HAS_THREADS__ */
- # endif /* _LIBC */
- #endif /* _RESOLV_H_ */
- #endif /* !_RESOLV_H_ */
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