*/
#ifndef _RESOLV_H_
-#define _RESOLV_H_
-
-#include <sys/param.h>
-#if (!defined(BSD)) || (BSD < 199306)
-# include <sys/bitypes.h>
-#else
-# include <sys/types.h>
-#endif
-#include <sys/cdefs.h>
-#include <stdio.h>
+/* These headers are needed for types used in the `struct res_state'
+ declaration. */
+#include <sys/types.h>
#include <netinet/in.h>
-#include <arpa/nameser.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 19991006 we don't have a new resolver yet */
-#define __RES 19960801
+#ifndef __need_res_state
+# define _RESOLV_H_
-/*
- * 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"
+# 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;
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" */
-};
-
/*
* 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. */
-
+# 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; /* retransmition time interval */
- int retry; /* number of times to retransmit */
- u_long options; /* option flags - see below. */
- 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 */
+ /*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_long 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];
+ 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];
- 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 */
+#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 {
- char pad[52]; /* On an i386 this means 512b total. */
struct {
- u_int16_t nscount;
- u_int16_t nstimes[MAXNS]; /* ms. */
+#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;
- struct sockaddr_in6 *nsaddrs[MAXNS];
+ /* 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).
/*
* 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_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)
+#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_INIT 0x00004000
/* 0x00008000 */
-
/* Things involving an internal (static) resolver context. */
-#if defined __UCLIBC_HAS_THREADS__
-
__BEGIN_DECLS
extern struct __res_state *__res_state(void) __attribute__ ((__const__));
__END_DECLS
#define _res (*__res_state())
-#else /* !__UCLIBC_HAS_THREADS__ */
-
-#ifndef __BIND_NOSTATIC
-extern struct __res_state _res;
-#endif
-
-#endif /* __UCLIBC_HAS_THREADS__ */
-
-
-#ifndef __BIND_NOSTATIC
+#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
-void fp_nquery __P((const u_char *, int, FILE *));
-void fp_query __P((const u_char *, FILE *));
-const char * hostalias __P((const char *));
-void p_query __P((const u_char *));
-void res_close __P((void));
-int res_init __P((void));
-int res_isourserver __P((const struct sockaddr_in *));
-int res_mkquery __P((int, const char *, int, int, const u_char *,
- int, const u_char *, u_char *, int));
-int res_query __P((const char *, int, int, u_char *, int));
-int res_querydomain __P((const char *, const char *, int, int,
- u_char *, int));
-int res_search __P((const char *, int, int, u_char *, int));
-int res_send __P((const u_char *, int, u_char *, int));
-__END_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 !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 */
-
+#if 0
#define b64_ntop __b64_ntop
#define b64_pton __b64_pton
-#define dn_comp __dn_comp
#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 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_npquery __res_npquery
#define res_nquery __res_nquery
#define sym_ntop __sym_ntop
#define sym_ntos __sym_ntos
#define sym_ston __sym_ston
+#endif
__BEGIN_DECLS
-int res_hnok __P((const char *));
-int res_ownok __P((const char *));
-int res_mailok __P((const char *));
-int res_dnok __P((const char *));
-int sym_ston __P((const struct res_sym *, const char *, int *));
-const char * sym_ntos __P((const struct res_sym *, int, int *));
-const char * sym_ntop __P((const struct res_sym *, int, int *));
-int b64_ntop __P((u_char const *, size_t, char *, size_t));
-int b64_pton __P((char const *, u_char *, size_t));
-int loc_aton __P((const char *ascii, u_char *binary));
-const char * loc_ntoa __P((const u_char *binary, char *ascii));
-int dn_skipname __P((const u_char *, const u_char *));
-void putlong __P((u_int32_t, u_char *));
-void putshort __P((u_int16_t, u_char *));
-const char * p_class __P((int));
-const char * p_time __P((u_int32_t));
-const char * p_type __P((int));
-const char * p_rcode __P((int));
-const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *));
-const u_char * p_cdname __P((const u_char *, const u_char *, FILE *));
-const u_char * p_fqnname __P((const u_char *cp, const u_char *msg,
- int, char *, int));
-const u_char * p_fqname __P((const u_char *, const u_char *, FILE *));
-const char * p_option __P((u_long option));
-char * p_secstodate __P((u_long));
-int dn_count_labels __P((const char *));
-int dn_comp __P((const char *, u_char *, int,
- u_char **, u_char **));
-int dn_expand __P((const u_char *, const u_char *, const u_char *,
- char *, int));
-u_int res_randomid __P((void));
-int res_nameinquery __P((const char *, int, int,
- const u_char *, const u_char *));
-int res_queriesmatch __P((const u_char *, const u_char *,
- const u_char *, const u_char *));
-const char * p_section __P((int section, int opcode));
+#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_ninit __P((res_state));
-int res_nisourserver __P((const res_state,
- const struct sockaddr_in *));
-void fp_resstat __P((const res_state, FILE *));
-void res_npquery __P((const res_state, const u_char *, int, FILE *));
-const char * res_hostalias __P((const res_state, const char *,
- char *, size_t));
-int res_nquery __P((res_state,
- const char *, int, int, u_char *, int));
-int res_nsearch __P((res_state, const char *, int,
- int, u_char *, int));
-int res_nquerydomain __P((res_state,
- const char *, const char *, int, int,
- u_char *, int));
-int res_nmkquery __P((res_state,
- int, const char *, int, int, const u_char *,
- int, const u_char *, u_char *, int));
-int res_nsend __P((res_state, const u_char *, int, u_char *, int));
-void res_nclose __P((res_state));
+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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