The Tor Browser / file revision

 /*	$NetBSD: resolv.h,v 1.31 2005/12/26 19:01:47 perry Exp $	*/

 /*

  * 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.

  * 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.

  */

 /*

  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")

  * 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 ISC DISCLAIMS ALL WARRANTIES

  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC 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

  *	Id: resolv.h,v 1.7.2.11.4.2 2004/06/25 00:41:05 marka Exp

  */

 /*

  * This version of this file is derived from Android 2.3 "Gingerbread",

  * which contains uncredited changes by Android/Google developers.  It has

  * been modified in 2011 for use in the Android build of Mozilla Firefox by

  * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,

  * and Steve Workman <sjhworkman@gmail.com>).

  * These changes are offered under the same license as the original NetBSD

  * file, whose copyright and license are unchanged above.

  */

 #ifndef _RESOLV_PRIVATE_H_

 #define	_RESOLV_PRIVATE_H_

 #include <resolv.h>

 #include "resolv_static.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	20030124

 /*

  * This used to be defined in res_query.c, now it's in herror.c.

  * [XXX no it's not.  It's in irs/irs_data.c]

  * It was

  * never extern'd by any *.h file before it was placed here.  For thread

  * aware programs, the last h_errno value set is stored in res->h_errno.

  *

  * XXX:	There doesn't seem to be a good reason for exposing RES_SET_H_ERRNO

  *	(and __h_errno_set) to the public via <resolv.h>.

  * XXX:	__h_errno_set is really part of IRS, not part of the resolver.

  *	If somebody wants to build and use a resolver that doesn't use IRS,

  *	what do they do?  Perhaps something like

  *		#ifdef WANT_IRS

  *		# define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x)

  *		#else

  *		# define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x))

  *		#endif

  */

 #define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x))

 struct __res_state; /* forward */

 /*

  * 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

 #ifdef ANDROID_CHANGES

 #define _PATH_RESCONF        "/etc/ppp/resolv.conf"

 #else

 #define _PATH_RESCONF        "/etc/resolv.conf"

 #endif

 #endif

 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }

 	res_sendhookact;

 typedef res_sendhookact (*res_send_qhook)(struct sockaddr * const *,

 					      const u_char **, int *,

 					      u_char *, int, int *);

 typedef res_sendhookact (*res_send_rhook)(const struct sockaddr *,

 					      const u_char *, int, u_char *,

 					      int, int *);

 struct res_sym {

 	int		number;	   /* Identifying number, like T_MX */

 	const char *	name;	   /* Its symbolic name, like "MX" */

 	const char *	humanname; /* Its fun name, like "mail exchanger" */

 };

 /*

  * 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		2	/* Default #/tries. */

 #define	RES_MAXTIME		65535	/* Infinity, in milliseconds. */

 struct __res_state_ext;

 struct __res_state {

 	int	retrans;	 	/* retransmission time interval */

 	int	retry;			/* number of times to retransmit */

 #ifdef sun

 	u_int	options;		/* option flags - see below. */

 #else

 	u_long	options;		/* option flags - see below. */

 #endif

 	int	nscount;		/* number of name servers */

 	struct sockaddr_in

 		nsaddr_list[MAXNS];	/* address of name server */

 #define	nsaddr	nsaddr_list[0]		/* for backward compatibility */

 	u_short	id;			/* current message id */

 	char	*dnsrch[MAXDNSRCH+1];	/* components of domain to search */

 	char	defdname[256];		/* default domain (deprecated) */

 #ifdef sun

 	u_int	pfcode;			/* RES_PRF_ flags - see below. */

 #else

 	u_long	pfcode;			/* RES_PRF_ flags - see below. */

 #endif

 	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;

 		uint32_t	mask;

 	} sort_list[MAXRESOLVSORT];

 #ifdef __OLD_RES_STATE

 	char lookups[4];

 #else

 	res_send_qhook qhook;		/* query hook */

 	res_send_rhook rhook;		/* response hook */

 	int	res_h_errno;		/* last one set for this context */

 	int	_vcsock;		/* PRIVATE: for res_send VC i/o */

 	u_int	_flags;			/* PRIVATE: see below */

 	u_int	_pad;			/* make _u 64 bit aligned */

 	union {

 		/* On an 32-bit arch this means 512b total. */

 		char	pad[72 - 4*sizeof (int) - 2*sizeof (void *)];

 		struct {

 			uint16_t		nscount;

 			uint16_t		nstimes[MAXNS];	/* ms. */

 			int			nssocks[MAXNS];

 			struct __res_state_ext *ext;	/* extention for IPv6 */

 		} _ext;

 	} _u;

 #endif

         struct res_static   rstatic[1];

 };

 typedef struct __res_state *res_state;

 union res_sockaddr_union {

 	struct sockaddr_in	sin;

 #ifdef IN6ADDR_ANY_INIT

 	struct sockaddr_in6	sin6;

 #endif

 #ifdef ISC_ALIGN64

 	int64_t			__align64;	/* 64bit alignment */

 #else

 	int32_t			__align32;	/* 32bit alignment */

 #endif

 	char			__space[128];   /* max size */

 };

 /*

  * 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 */

 #define	RES_F_EDNS0ERR	0x00000004	/* EDNS0 caused errors */

 #define	RES_F__UNUSED	0x00000008	/* (unused) */

 #define	RES_F_LASTMASK	0x000000F0	/* ordinal server of last res_nsend */

 #define	RES_F_LASTSHIFT	4		/* bit position of LASTMASK "flag" */

 #define	RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT)

 /* res_findzonecut2() options */

 #define	RES_EXHAUSTIVE	0x00000001	/* always do all queries */

 #define	RES_IPV4ONLY	0x00000002	/* IPv4 only */

 #define	RES_IPV6ONLY	0x00000004	/* IPv6 only */

 /*

  * 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() */

 #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 */

 #define RES_NOTLDQUERY	0x00100000	/* don't unqualified name as a tld */

 #define RES_USE_DNSSEC	0x00200000	/* use DNSSEC using OK bit in OPT */

 /* #define RES_DEBUG2	0x00400000 */	/* nslookup internal */

 /* KAME extensions: use higher bit to avoid conflict with ISC use */

 #define RES_USE_DNAME	0x10000000	/* use DNAME */

 #define RES_USE_EDNS0	0x40000000	/* use EDNS0 if configured */

 #define RES_NO_NIBBLE2	0x80000000	/* disable alternate nibble lookup */

 #define RES_DEFAULT	(RES_RECURSE | RES_DEFNAMES | \

 			 RES_DNSRCH | RES_NO_NIBBLE2)

 /*

  * 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

 #define RES_PRF_TRUNC	0x00008000

 /*			0x00010000	*/

 /* Things involving an internal (static) resolver context. */

 __BEGIN_DECLS

 extern struct __res_state *__res_get_state(void);

 extern void __res_put_state(struct __res_state *);

 #ifndef ANDROID_CHANGES

 /*

  * Source and Binary compatibility; _res will not work properly

  * with multi-threaded programs.

  */

 extern struct __res_state *__res_state(void);

 #define _res (*__res_state())

 #endif

 __END_DECLS

 #ifndef __BIND_NOSTATIC

 #define fp_nquery		__fp_nquery

 #define fp_query		__fp_query

 #define hostalias		__hostalias

 #define p_query			__p_query

 #define res_close		__res_close

 #define res_opt			__res_opt

 #define res_isourserver		__res_isourserver

 #define	res_querydomain		__res_querydomain

 #define res_send		__res_send

 #define res_sendsigned		__res_sendsigned

 #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_mkquery	__res_mkquery

 #endif

 __BEGIN_DECLS

 void		fp_nquery(const u_char *, int, FILE *);

 void		fp_query(const u_char *, FILE *);

 const char *	hostalias(const char *);

 void		p_query(const u_char *);

 void		res_close(void);

 int		res_init(void);

 int		res_opt(int, u_char *, int, int);

 int		res_isourserver(const struct sockaddr_in *);

 int		res_mkquery(int, const char *, int, int, const u_char *, int, const u_char *, u_char *, int);

 int		res_query(const char *, int, int, u_char *, int);

 int		res_querydomain(const char *, const char *, int, int, u_char *, int);

 int		res_search(const char *, int, int, u_char *, int);

 int		res_send(const u_char *, int, u_char *, int);

 int		res_sendsigned(const u_char *, int, ns_tsig_key *, u_char *, int);

 __END_DECLS

 #endif

 #if !defined(SHARED_LIBBIND) || defined(LIB)

 /*

  * If libbind is a shared object (well, DLL anyway)

  * these externs break the linker when resolv.h is

  * included by a lib client (like named)

  * Make them go away if a client is including this

  *

  */

 extern const struct res_sym __p_key_syms[];

 extern const struct res_sym __p_cert_syms[];

 extern const struct res_sym __p_class_syms[];

 extern const struct res_sym __p_type_syms[];

 extern const struct res_sym __p_rcode_syms[];

 #endif /* SHARED_LIBBIND */

 #ifndef ADNROID_CHANGES

 #define b64_ntop		__b64_ntop

 #define b64_pton		__b64_pton

 #endif

 #define dn_comp			__dn_comp

 #define dn_count_labels		__dn_count_labels

 #define dn_skipname		__dn_skipname

 #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 p_sockun		__p_sockun

 #define putlong			__putlong

 #define putshort		__putshort

 #define res_dnok		__res_dnok

 #define res_findzonecut		__res_findzonecut

 #define res_findzonecut2	__res_findzonecut2

 #define res_hnok		__res_hnok

 #define res_hostalias		__res_hostalias

 #define res_mailok		__res_mailok

 #define res_nameinquery		__res_nameinquery

 #define res_nclose		__res_nclose

 #define res_ninit		__res_ninit

 #define res_nmkquery		__res_nmkquery

 #define res_pquery		__res_pquery

 #define res_nquery		__res_nquery

 #define res_nquerydomain	__res_nquerydomain

 #define res_nsearch		__res_nsearch

 #define res_nsend		__res_nsend

 #define res_nsendsigned		__res_nsendsigned

 #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

 #define res_nopt		__res_nopt

 #define res_ndestroy		__res_ndestroy

 #define	res_nametoclass		__res_nametoclass

 #define	res_nametotype		__res_nametotype

 #define	res_setservers		__res_setservers

 #define	res_getservers		__res_getservers

 #define	res_buildprotolist	__res_buildprotolist

 #define	res_destroyprotolist	__res_destroyprotolist

 #define	res_destroyservicelist	__res_destroyservicelist

 #define	res_get_nibblesuffix	__res_get_nibblesuffix

 #define	res_get_nibblesuffix2	__res_get_nibblesuffix2

 #define	res_ourserver_p		__res_ourserver_p

 #define	res_protocolname	__res_protocolname

 #define	res_protocolnumber	__res_protocolnumber

 #define	res_send_setqhook	__res_send_setqhook

 #define	res_send_setrhook	__res_send_setrhook

 #define	res_servicename		__res_servicename

 #define	res_servicenumber	__res_servicenumber

 __BEGIN_DECLS

 int		res_hnok(const char *);

 int		res_ownok(const char *);

 int		res_mailok(const char *);

 int		res_dnok(const char *);

 int		sym_ston(const struct res_sym *, const char *, int *);

 const char *	sym_ntos(const struct res_sym *, int, int *);

 const char *	sym_ntop(const struct res_sym *, int, int *);

 #ifndef ANDROID_CHANGES

 int		b64_ntop(u_char const *, size_t, char *, size_t);

 int		b64_pton(char const *, u_char *, size_t);

 #endif

 int		loc_aton(const char *, u_char *);

 const char *	loc_ntoa(const u_char *, char *);

 int		dn_skipname(const u_char *, const u_char *);

 void		putlong(uint32_t, u_char *);

 void		putshort(uint16_t, u_char *);

 #ifndef __ultrix__

 uint16_t	_getshort(const u_char *);

 uint32_t	_getlong(const u_char *);

 #endif

 const char *	p_class(int);

 const char *	p_time(uint32_t);

 const char *	p_type(int);

 const char *	p_rcode(int);

 const char *	p_sockun(union res_sockaddr_union, char *, size_t);

 const u_char *	p_cdnname(const u_char *, const u_char *, int, FILE *);

 const u_char *	p_cdname(const u_char *, const u_char *, FILE *);

 const u_char *	p_fqnname(const u_char *, const u_char *,

 			       int, char *, int);

 const u_char *	p_fqname(const u_char *, const u_char *, FILE *);

 const char *	p_option(u_long);

 char *		p_secstodate(u_long);

 int		dn_count_labels(const char *);

 int		dn_comp(const char *, u_char *, int, u_char **, u_char **);

 int		dn_expand(const u_char *, const u_char *, const u_char *,

 			       char *, int);

 u_int		res_randomid(void);

 int		res_nameinquery(const char *, int, int, const u_char *,

 				     const u_char *);

 int		res_queriesmatch(const u_char *, const u_char *,

 				      const u_char *, const u_char *);

 const char *	p_section(int, int);

 /* Things involving a resolver context. */

 int		res_ninit(res_state);

 int		res_nisourserver(const res_state, const struct sockaddr_in *);

 void		fp_resstat(const res_state, FILE *);

 void		res_pquery(const res_state, const u_char *, int, FILE *);

 const char *	res_hostalias(const res_state, const char *, char *, size_t);

 int		res_nquery(res_state, const char *, int, int, u_char *, int);

 int		res_nsearch(res_state, const char *, int, int, u_char *, int);

 int		res_nquerydomain(res_state, const char *, const char *,

 				      int, int, u_char *, int);

 int		res_nmkquery(res_state, int, const char *, int, int,

 				  const u_char *, int, const u_char *,

 				  u_char *, int);

 int		res_nsend(res_state, const u_char *, int, u_char *, int);

 int		res_nsendsigned(res_state, const u_char *, int,

 				     ns_tsig_key *, u_char *, int);

 int		res_findzonecut(res_state, const char *, ns_class, int,

 				     char *, size_t, struct in_addr *, int);

 int		res_findzonecut2(res_state, const char *, ns_class, int,

 				      char *, size_t,

 				      union res_sockaddr_union *, int);

 void		res_nclose(res_state);

 int		res_nopt(res_state, int, u_char *, int, int);

 void		res_send_setqhook(res_send_qhook);

 void		res_send_setrhook(res_send_rhook);

 int		__res_vinit(res_state, int);

 void		res_destroyservicelist(void);

 const char *	res_servicename(uint16_t, const char *);

 const char *	res_protocolname(int);

 void		res_destroyprotolist(void);

 void		res_buildprotolist(void);

 const char *	res_get_nibblesuffix(res_state);

 const char *	res_get_nibblesuffix2(res_state);

 void		res_ndestroy(res_state);

 uint16_t	res_nametoclass(const char *, int *);

 uint16_t	res_nametotype(const char *, int *);

 void		res_setservers(res_state,

 				    const union res_sockaddr_union *, int);

 int		res_getservers(res_state,

 				    union res_sockaddr_union *, int);

 int res_get_dns_changed();

 u_int  res_randomid(void);

 __END_DECLS

 #endif /* !_RESOLV_PRIVATE_H_ */