| /* |
| * 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 |
| |
| #if 0 |
| #define b64_ntop __b64_ntop |
| #define b64_pton __b64_pton |
| #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; |
| int b64_ntop (u_char const *, size_t, char *, size_t) __THROW; |
| int b64_pton (char const *, u_char *, size_t) __THROW; |
| 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_ */ |