/* $OpenBSD: resolv.h,v 1.23 2021/11/22 20:18:27 jca Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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. * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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. */ /* * ++Copyright++ 1983, 1987, 1989, 1993 * - * Copyright (c) 1983, 1987, 1989, 1993 * 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. * 3. 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) 1993 by Digital Equipment Corporation. * * 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, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION 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. * - * --Copyright-- */ /* * @(#)resolv.h 8.1 (Berkeley) 6/2/93 * $From: resolv.h,v 8.17 1996/11/26 10:11:20 vixie Exp $ */ #ifndef _RESOLV_H_ #define _RESOLV_H_ #include <sys/types.h> #include <sys/socket.h> #include <stdio.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. */ #define __RES 19960801 /* * Resolver configuration file. * Normally not present, but may contain the address of the * initial name server(s) to query and the domain search list. */ #ifndef _PATH_RESCONF #define _PATH_RESCONF "/etc/resolv.conf" #endif /* * 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 MAXDNSLUS 4 /* max # of host lookup types */ #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 */ struct __res_state { int retrans; /* retransmission time interval */ int retry; /* number of times to retransmit */ unsigned int options; /* option flags - see below. */ int nscount; /* number of name servers */ int family[2]; /* specifies which address * families will be queried and * in which order */ struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ #define nsaddr nsaddr_list[0] /* for backward compatibility */ unsigned short id; /* current message id */ char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ char defdname[256]; /* default domain (deprecated) */ unsigned int pfcode; /* RES_PRF_ flags - see below. */ unsigned ndots:4; /* threshold for initial abs. query */ unsigned nsort:4; /* number of elements in sort_list[] */ char unused[3]; struct { struct in_addr addr; u_int32_t mask; } sort_list[MAXRESOLVSORT]; char lookups[MAXDNSLUS]; struct { time_t __res_sec; long __res_nsec; } restimespec; time_t reschktime; }; #if 1 /* INET6 */ /* * replacement of __res_state, separated to keep binary compatibility. */ struct __res_state_ext { struct sockaddr_storage nsaddr_list[MAXNS]; struct { int af; /* address family for addr, mask */ union { struct in_addr ina; struct in6_addr in6a; } addr, mask; } sort_list[MAXRESOLVSORT]; }; #endif /* * Resolver options (keep these in synch with res_debug.c, please) */ #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() */ /* KAME extensions: use higher bit to avoid conflict with ISC use */ #define RES_USE_EDNS0 0x40000000 /* use EDNS0 */ /* DNSSEC extensions: use higher bit to avoid conflict with ISC use */ #define RES_USE_DNSSEC 0x20000000 /* use DNSSEC using OK bit in OPT */ #define RES_USE_CD 0x10000000 /* set Checking Disabled flag */ #define RES_TRUSTAD 0x80000000 /* Request AD, keep it in responses. */ #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) /* * Resolver "pfcode" values. Used by dig. */ #define RES_PRF_STATS 0x00000001 /* 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 */ /* hooks are still experimental as of 4.9.2 */ 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 unsigned char **query, int *querylen, unsigned char *ans, int anssiz, int *resplen); typedef res_sendhookact (*res_send_rhook)(const struct sockaddr_in *ns, const unsigned char *query, int querylen, unsigned char *ans, int anssiz, int *resplen); 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" */ }; extern struct __res_state _res; #if 1 /* INET6 */ extern struct __res_state_ext _res_ext; #endif extern const struct res_sym __p_class_syms[]; extern const struct res_sym __p_type_syms[]; /* Private routines shared between libc/net, named, nslookup and others. */ #define res_hnok __res_hnok #define res_ownok __res_ownok #define res_mailok __res_mailok #define res_dnok __res_dnok #define sym_ntos __sym_ntos #define b64_ntop __b64_ntop #define b64_pton __b64_pton #define dn_skipname __dn_skipname #define putlong __putlong #define putshort __putshort #define p_class __p_class #define p_type __p_type #define dn_count_labels __dn_count_labels #define dn_comp __dn_comp #define res_randomid __res_randomid #define res_send __res_send #define res_opt __res_opt #ifdef BIND_RES_POSIX3 #define dn_expand __dn_expand #define res_init __res_init #define res_query __res_query #define res_search __res_search #define res_querydomain __res_querydomain #define res_mkquery __res_mkquery #endif __BEGIN_DECLS int res_hnok(const char *); int res_ownok(const char *); int res_mailok(const char *); int res_dnok(const char *); const char * sym_ntos(const struct res_sym *, int, int *); int b64_ntop(unsigned char const *, size_t, char *, size_t); int b64_pton(char const *, unsigned char *, size_t); int dn_skipname(const unsigned char *, const unsigned char *); void putlong(u_int32_t, unsigned char *); void putshort(u_int16_t, unsigned char *); const char * p_class(int); const char * p_type(int); int dn_comp(const char *, unsigned char *, int, unsigned char **, unsigned char **); int dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int); int res_init(void); unsigned int res_randomid(void); int res_query(const char *, int, int, unsigned char *, int) __attribute__((__bounded__(__string__,4,5))); int res_search(const char *, int, int, unsigned char *, int) __attribute__((__bounded__(__string__,4,5))); int res_querydomain(const char *, const char *, int, int, unsigned char *, int) __attribute__((__bounded__(__string__,5,6))); int res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char *, unsigned char *, int) __attribute__((__bounded__(__string__,5,6))) __attribute__((__bounded__(__string__,8,9))); int res_send(const unsigned char *, int, unsigned char *, int) __attribute__((__bounded__(__string__,3,4))); __END_DECLS #endif /* !_RESOLV_H_ */
