+2000-07-18 Mark Kettenis <kettenis@gnu.org>
+
+ Update resolver code to BIND 8.2.3-T5B.
+
+ * resolv/Versions [GLIBC_2.2] (libc): Add __res_init and
+ __res_nclose.
+ [GLIBC_2.2] (libresolv): Add __dn_expand, __ns_samename,
+ __res_mkquery, __res_nsend, __res_query, __res_querydomain and
+ __res_search.
+ * resolv/Banner: BIND-8.2.3-T5B.
+
+ * resolv/base64.c: Update from BIND 8.2.3-T5B.
+ * resolv/herror.c: Likewise.
+ * resolv/inet_addr.c: Likewise.
+ * resolv/inet_net_ntop.c: Likewise.
+ * resolv/inet_net_pton.c: Likewise.
+ * resolv/inet_neta.c: Likewise.
+ * resolv/inet_ntop.c: Likewise.
+ * resolv/nsap_addr.c: Likewise.
+ * resolv/inet_pton.c: Likewise. Reject a few more more invalid
+ IPv6 addresses (ISC bug #520).
+
+ * resolv/ns_name.c: Avoid emitting RCS ID in object file.
+ * resolv/ns_parse.c: Likewise.
+ * resolv/ns_netint.c: Likewise.
+ * resolv/ns_samedomain.c: Likewise.
+ * resolv/ns_ttl.c: Likewise.
+ * resolv/ns_print.c: Update from BIND 8.2.3-T5B. Avoid emitting
+ RCS ID in object file.
+
+ * resolv/res_debug.c: Update from BIND 8.2.3-T5B.
+ * resolv/res_mkquery.c: Likewise.
+ * resolv/res_query.c: Likewise.
+ * resolv/res_init.c: Likewise.
+ (res_setoptions): Mark internal.
+ * resolv/res_send.c: Likewise.
+ [_LIBC]: Fully reinstate the code that avoids the FD_SETSIZE limit
+ by using poll instead.
+ * resolv/res_comp.c: Likewise.
+ [SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_2)]: Make dn_expand a
+ weak alias for __dn_expand.
+ * resolv/res_data.c: Likewise.
+ (res_close) [_LIBC]: Don't call res_nclose if RES_INIT isn't set
+ in _res.options. Avoids a potential security risk by avoiding a
+ close (0).
+ [SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_2)]: Make
+ res_mkquery, res_query, res_querydomain adn res_search weak
+ aliases for __res_mkquery, __res_query, __res_querydomain and
+ __res_search.
+ * resolv/res_libc.c: (_res): Don't initialize. Fix res_close
+ instead to avoid close(0).
+ (res_init): Always use the static resolver context.
+ [SHLIB_COMPAT (libc, GLIBC_2.0, GLIBC_2_2)]: Make res_init a weak
+ alias for __res_init.
+
+ * resolv/resolv.h: Update from BIND 8.2.3-T5B. Move definition of
+ RES_SET_H_ERRNO and accompanying comment to...
+ * include/resolv.h: ... here.
+
+ * resolv/arpa/namser.h: Update from BIND 8.2.3-T5B.
+ * resolv/arpa/nameser_compat.h: Likewise.
+
2000-07-18 Ulrich Drepper <drepper@redhat.com>
* nss/makedb.c (main): Compare result of load_db with
+#ifndef _RESOLV_H_
+
+#define RES_SET_H_ERRNO(r,x) \
+ do \
+ { \
+ (r)->res_h_errno = x; \
+ __set_h_errno(x); \
+ } \
+ while (0)
+
#include <resolv/resolv.h>
+#endif
new_thread->p_canceltype = PTHREAD_CANCEL_DEFERRED;
new_thread->p_errnop = &new_thread->p_errno;
new_thread->p_h_errnop = &new_thread->p_h_errno;
- new_thread->p_res._sock = -1;
new_thread->p_resp = &new_thread->p_res;
new_thread->p_guardaddr = guardaddr;
new_thread->p_guardsize = guardsize;
-BIND-8.2.2-5
+BIND-8.2.3-T5B
}
GLIBC_2.2 {
# r*
- __res_state; __res_ninit;
+ __res_state; __res_init; __res_nclose; __res_ninit;
}
}
__ns_name_unpack; __ns_name_ntop;
}
GLIBC_2.2 {
- __res_nmkquery; __res_nquery; __res_nquerydomain; __res_nsearch;
- __ns_get16; __res_hostalias;
+ __dn_expand;
+ __ns_get16; __ns_samename;
+ __res_hostalias; __res_mkquery; __res_nmkquery; __res_nquery;
+ __res_nquerydomain; __res_nsearch; __res_nsend; __res_query;
+ __res_querydomain; __res_search;
}
libnss_dns {
*/
/*
- * $Id$
+ * $BINDId: nameser.h,v 8.37 2000/03/30 21:16:49 vixie Exp $
*/
#ifndef _ARPA_NAMESER_H_
#define BIND_4_COMPAT
-#include <features.h>
#include <sys/param.h>
-#include <sys/types.h>
+#if (!defined(BSD)) || (BSD < 199306)
+# include <sys/bitypes.h>
+#else
+# include <sys/types.h>
+#endif
+#include <sys/cdefs.h>
/*
* Revision information. This is the release date in YYYYMMDD format.
#define ns_name_compress __ns_name_compress
#define ns_name_uncompress __ns_name_uncompress
#define ns_name_skip __ns_name_skip
+#define ns_name_rollback __ns_name_rollback
#define ns_sign __ns_sign
#define ns_sign_tcp __ns_sign_tcp
#define ns_sign_tcp_init __ns_sign_tcp_init
int ns_name_compress __P((const char *, u_char *, size_t,
const u_char **, const u_char **));
int ns_name_skip __P((const u_char **, const u_char *));
+void ns_name_rollback __P((const u_char *, const u_char **,
+ const u_char **));
int ns_sign __P((u_char *, int *, int, int, void *,
const u_char *, int, u_char *, int *, time_t));
int ns_sign_tcp __P((u_char *, int *, int, int,
/*
* from nameser.h 8.1 (Berkeley) 6/2/93
- * $Id$
+ * $BINDId: nameser_compat.h,v 8.11 1999/01/02 08:00:58 vixie Exp $
*/
#ifndef _ARPA_NAMESER_COMPAT_
#define __BIND 19950621 /* (DEAD) interface version stamp. */
-/* glibc always has byte order info in <endian.h> */
#include <endian.h>
/*
/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * 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
* IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
*/
+#if !defined(LINT) && !defined(CODECENTER)
+static const char rcsid[] = "$BINDId: base64.c,v 8.7 1999/10/13 16:39:33 vixie Exp $";
+#endif /* not lint */
+
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
+
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
#include <resolv.h>
#include <stdio.h>
-
-#if defined(BSD) && (BSD >= 199103) && defined(AF_INET6)
-# include <stdlib.h>
-# include <string.h>
-#else
-# include "../conf/portability.h"
-#endif
+#include <stdlib.h>
+#include <string.h>
#define Assert(Cond) if (!(Cond)) abort()
end of the data is performed using the '=' character.
Since all base64 input is an integral number of octets, only the
- -------------------------------------------------
+ -------------------------------------------------
following cases can arise:
-
+
(1) the final quantum of encoding input is an integral
multiple of 24 bits; here, the final unit of encoded
output will be an integral multiple of 4 characters
*/
int
-b64_ntop(src, srclength, target, targsize)
- u_char const *src;
- size_t srclength;
- char *target;
- size_t targsize;
-{
+b64_ntop(u_char const *src, size_t srclength, char *target, size_t targsize) {
size_t datalength = 0;
u_char input[3];
u_char output[4];
target[datalength++] = Base64[output[2]];
target[datalength++] = Base64[output[3]];
}
-
+
/* Now we worry about padding. */
if (0 != srclength) {
/* Get what's left. */
input[0] = input[1] = input[2] = '\0';
for (i = 0; i < srclength; i++)
input[i] = *src++;
-
+
output[0] = input[0] >> 2;
output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
u_char *target;
size_t targsize;
{
- size_t tarindex;
- int state, ch;
+ int tarindex, state, ch;
char *pos;
state = 0;
switch (state) {
case 0:
if (target) {
- if (tarindex >= targsize)
+ if ((size_t)tarindex >= targsize)
return (-1);
target[tarindex] = (pos - Base64) << 2;
}
break;
case 1:
if (target) {
- if (tarindex + 1 >= targsize)
+ if ((size_t)tarindex + 1 >= targsize)
return (-1);
target[tarindex] |= (pos - Base64) >> 4;
target[tarindex+1] = ((pos - Base64) & 0x0f)
break;
case 2:
if (target) {
- if (tarindex + 1 >= targsize)
+ if ((size_t)tarindex + 1 >= targsize)
return (-1);
target[tarindex] |= (pos - Base64) >> 2;
target[tarindex+1] = ((pos - Base64) & 0x03)
break;
case 3:
if (target) {
- if (tarindex >= targsize)
+ if ((size_t)tarindex >= targsize)
return (-1);
target[tarindex] |= (pos - Base64);
}
case 2: /* Valid, means one byte of info */
/* Skip any number of spaces. */
-#ifdef _LIBC
- /* To avoid warnings. */
- for ( ; ch != '\0'; ch = *src++)
-#else
- for (NULL; ch != '\0'; ch = *src++)
-#endif
+ for ((void)NULL; ch != '\0'; ch = *src++)
if (!isspace(ch))
break;
/* Make sure there is another trailing = sign. */
* We know this char is an =. Is there anything but
* whitespace after it?
*/
-#ifdef _LIBC
- /* To avoid warnings. */
- for ( ; ch != '\0'; ch = *src++)
-#else
- for (NULL; ch != '\0'; ch = *src++)
-#endif
+ for ((void)NULL; ch != '\0'; ch = *src++)
if (!isspace(ch))
return (-1);
/*
- * ++Copyright++ 1987, 1993
- * -
* Copyright (c) 1987, 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:
* 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
* 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.
+ */
+
+/*
+ * 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, 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.
+ * copyright notice and this permission notice appear in all copies.
*
- * 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
+ * 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.
- * -
- * --Copyright--
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
-static char rcsid[] = "$Id$";
+static const char sccsid[] = "@(#)herror.c 8.1 (Berkeley) 6/4/93";
+static const char rcsid[] = "$BINDId: herror.c,v 8.11 1999/10/13 16:39:39 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/uio.h>
+
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+
#include <netdb.h>
+#include <resolv.h>
+#include <string.h>
+#include <unistd.h>
+
#include <libintl.h>
-#if defined(BSD) && (BSD >= 199103)
-# include <unistd.h>
-# include <string.h>
-#else
-# include "../conf/portability.h"
-#endif
const char *h_errlist[] = {
N_("Resolver Error 0 (no error)"),
};
int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
-#ifndef h_errno
-extern int h_errno;
-#endif
-
/*
* herror --
* print the error indicated by the h_errno value.
*/
void
-herror(s)
- const char *s;
-{
- struct iovec iov[4];
- register struct iovec *v = iov;
+herror(const char *s) {
+ struct iovec iov[4], *v = iov;
+ extern int * __h_errno();
- if (s && *s) {
- v->iov_base = (char *)s;
+ if (s != NULL && *s != '\0') {
+ v->iov_base = (/*noconst*/ char *)s;
v->iov_len = strlen(s);
v++;
v->iov_base = ": ";
__writev(STDERR_FILENO, iov, (v - iov) + 1);
}
+/*
+ * hstrerror --
+ * return the string associated with a given "host" errno value.
+ */
const char *
-hstrerror(err)
- int err;
-{
+hstrerror(int err) {
if (err < 0)
return _("Resolver internal error");
else if (err < h_nerr)
/*
- * ++Copyright++ 1983, 1990, 1993
- * -
* Copyright (c) 1983, 1990, 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:
* 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
* 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
* 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--
+ */
+
+/*
+ * 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
-static char rcsid[] = "$Id$";
+static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
+static const char rcsid[] = "$BINDId: inet_addr.c,v 8.11 1999/10/13 16:39:25 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
+
#include <netinet/in.h>
#include <arpa/inet.h>
+
#include <ctype.h>
+
#ifdef _LIBC
# include <endian.h>
# include <stdint.h>
# include <limits.h>
# include <errno.h>
#endif
-#include "../conf/portability.h"
-
-/* these are compatibility routines, not needed on recent BSD releases */
/*
* Ascii internet address interpretation routine.
* The value returned is in network order.
*/
in_addr_t
-inet_addr(cp)
- register const char *cp;
-{
+inet_addr(const char *cp) {
struct in_addr val;
if (__inet_aton(cp, &val))
return (INADDR_NONE);
}
-/*
+/*
* Check whether "cp" is a valid ascii representation
* of an Internet address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.
* cannot distinguish between failure and a local broadcast address.
*/
in_addr_t
-__inet_aton(cp, addr)
- const char *cp;
- struct in_addr *addr;
-{
+__inet_aton(const char *cp, struct in_addr *addr) {
static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
- register in_addr_t val;
+ in_addr_t val;
#ifndef _LIBC
- register int base;
+ int base;
#endif
- register char c;
+ char c;
union iaddr {
uint8_t bytes[4];
uint32_t word;
} res;
- register uint8_t *pp = res.bytes;
+ uint8_t *pp = res.bytes;
int digit;
#ifdef _LIBC
}
c = *cp;
#else
- base = 10;
+ val = 0; base = 10; digit = 0;
if (c == '0') {
c = *++cp;
if (c == 'x' || c == 'X')
base = 16, c = *++cp;
- else
+ else {
base = 8;
+ digit = 1 ;
+ }
}
- val = 0;
for (;;) {
if (isascii(c) && isdigit(c)) {
+ if (base == 8 && (c == '8' || c == '9'))
+ return (0);
val = (val * base) + (c - '0');
c = *++cp;
+ digit = 1;
} else if (base == 16 && isascii(c) && isxdigit(c)) {
val = (val << 4) |
(c + 10 - (islower(c) ? 'a' : 'A'));
c = *++cp;
+ digit = 1;
} else
break;
}
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
*/
- if (pp > res.bytes + 3
- || val > 0xff)
+ if (pp > res.bytes + 3 || val > 0xff)
goto ret_0;
*pp++ = val;
c = *++cp;
*/
if (c != '\0' && (!isascii(c) || !isspace(c)))
goto ret_0;
-
/*
* Did we get a valid digit?
*/
if (val > max[pp - res.bytes])
goto ret_0;
- if (addr)
+ if (addr != NULL)
addr->s_addr = res.word | htonl (val);
#ifdef _LIBC
/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * 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
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: inet_net_ntop.c,v 1.6 1999/01/08 19:23:42 vixie Exp $";
#endif
#include <sys/types.h>
* pointer to dst, or NULL if an error occurred (check errno).
* note:
* network byte order assumed. this means 192.5.5.240/28 has
- * 0x11110000 in its fourth octet.
+ * 0b11110000 in its fourth octet.
* author:
* Paul Vixie (ISC), July 1996
*/
if (size < sizeof "0")
goto emsgsize;
*dst++ = '0';
- --size;
+ size--;
*dst = '\0';
}
/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * Copyright (c) 1996,1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: inet_net_pton.c,v 1.11 1999/01/08 19:23:44 vixie Exp $";
#endif
#include <sys/types.h>
* not an IPv4 network specification.
* note:
* network byte order assumed. this means 192.5.5.240/28 has
- * 0x11110000 in its fourth octet.
+ * 0b11110000 in its fourth octet.
* author:
* Paul Vixie (ISC), June 1996
*/
/* Hexadecimal: Eat nybble string. */
if (size <= 0)
goto emsgsize;
- *dst = 0, dirty = 0;
+ dirty = 0;
tmp = 0; /* To calm down gcc. */
src++; /* skip x or X. */
while (isxdigit((ch = *src++))) {
n = (const char *) __rawmemchr(xdigits, ch) - xdigits;
assert(n >= 0 && n <= 15);
if (dirty == 0)
- tmp = n << 4;
+ tmp = n;
else
- tmp |= n;
+ tmp = (tmp << 4) | n;
if (++dirty == 2) {
if (size-- <= 0)
goto emsgsize;
dirty = 0;
}
}
- if (dirty) {
+ if (dirty) { /* Odd trailing nybble? */
if (size-- <= 0)
goto emsgsize;
- *dst = (u_char) tmp;
+ *dst++ = (u_char) (tmp << 4);
}
} else if (isascii(ch) && isdigit(ch)) {
/* Decimal: eat dotted digit string. */
/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * Copyright (c) 1996,1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: inet_neta.c,v 1.6 1999/01/08 19:23:45 vixie Exp $";
#endif
#include <sys/types.h>
-/* Copyright (c) 1996 by Internet Software Consortium.
+/*
+ * Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: inet_ntop.c,v 1.8 1999/10/13 16:39:28 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
+
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
-#include <string.h>
+
#include <errno.h>
#include <stdio.h>
-#include "../conf/portability.h"
+#include <string.h>
#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
* sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
*/
-static const char *inet_ntop4 __P((const u_char *src, char *dst, socklen_t size))
+static const char *inet_ntop4 (const u_char *src, char *dst, socklen_t size)
internal_function;
-static const char *inet_ntop6 __P((const u_char *src, char *dst, socklen_t size))
+static const char *inet_ntop6 (const u_char *src, char *dst, socklen_t size)
internal_function;
/* char *
/* const char *
* inet_ntop4(src, dst, size)
- * format an IPv4 address, more or less like inet_ntoa()
+ * format an IPv4 address
* return:
* `dst' (as a const)
* notes:
*/
char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
struct { int base, len; } best, cur;
- u_int words[IN6ADDRSZ / INT16SZ];
+ u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
int i;
/*
* Find the longest run of 0x00's in src[] for :: shorthanding.
*/
memset(words, '\0', sizeof words);
- for (i = 0; i < IN6ADDRSZ; i += 2)
+ for (i = 0; i < NS_IN6ADDRSZ; i += 2)
words[i / 2] = (src[i] << 8) | src[i + 1];
best.base = -1;
cur.base = -1;
- for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
+ for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
if (words[i] == 0) {
if (cur.base == -1)
cur.base = i, cur.len = 1;
* Format the result.
*/
tp = tmp;
- for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
+ for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
/* Are we inside the best run of 0x00's? */
if (best.base != -1 && i >= best.base &&
i < (best.base + best.len)) {
tp += SPRINTF((tp, "%x", words[i]));
}
/* Was it a trailing run of 0x00's? */
- if (best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ))
+ if (best.base != -1 && (best.base + best.len) ==
+ (NS_IN6ADDRSZ / NS_INT16SZ))
*tp++ = ':';
*tp++ = '\0';
-/* Copyright (c) 1996 by Internet Software Consortium.
+/*
+ * 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
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: inet_pton.c,v 1.7 1999/10/13 16:39:28 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
-#include <conf/portability.h>
/*
* WARNING: Don't even consider trying to compile this on a system where
u_char *dst;
{
int saw_digit, octets, ch;
- u_char tmp[INADDRSZ], *tp;
+ u_char tmp[NS_INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
}
if (octets < 4)
return (0);
-
- memcpy(dst, tmp, INADDRSZ);
+ memcpy(dst, tmp, NS_INADDRSZ);
return (1);
}
u_char *dst;
{
static const char xdigits[] = "0123456789abcdef";
- u_char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
+ u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
const char *curtok;
int ch, saw_xdigit;
u_int val;
- tp = memset(tmp, '\0', IN6ADDRSZ);
- endp = tp + IN6ADDRSZ;
+ tp = memset(tmp, '\0', NS_IN6ADDRSZ);
+ endp = tp + NS_IN6ADDRSZ;
colonp = NULL;
/* Leading :: requires some special handling. */
if (*src == ':')
return (0);
colonp = tp;
continue;
+ } else if (*src == '\0') {
+ return (0);
}
- if (tp + INT16SZ > endp)
+ if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
val = 0;
continue;
}
- if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
+ if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
inet_pton4(curtok, tp) > 0) {
- tp += INADDRSZ;
+ tp += NS_INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
return (0);
}
if (saw_xdigit) {
- if (tp + INT16SZ > endp)
+ if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
const int n = tp - colonp;
int i;
+ if (tp == endp)
+ return (0);
for (i = 1; i <= n; i++) {
endp[- i] = colonp[n - i];
colonp[n - i] = 0;
}
if (tp != endp)
return (0);
- memcpy(dst, tmp, IN6ADDRSZ);
+ memcpy(dst, tmp, NS_IN6ADDRSZ);
return (1);
}
* SOFTWARE.
*/
-#ifndef lint
-static const char rcsid[] = "$Id$";
+#if !defined(_LIBC) && !defined(lint)
+static const char rcsid[] = "$BINDId: ns_name.c,v 8.15 2000/03/30 22:53:46 vixie Exp $";
#endif
#include <sys/types.h>
u_char *dstp;
const u_char **cpp, **lpp, *eob, *msg;
const u_char *srcp;
- int n, l;
+ int n, l, first = 1;
srcp = src;
dstp = dst;
}
/* Not found, save it. */
if (lastdnptr != NULL && cpp < lastdnptr - 1 &&
- (dstp - msg) < 0x4000) {
+ (dstp - msg) < 0x4000 && first) {
*cpp++ = dstp;
*cpp = NULL;
+ first = 0;
}
}
/* copy label to buffer */
}
/*
+ * Reset dnptrs so that there are no active references to pointers at or
+ * after src.
+ */
+void
+ns_name_rollback(const u_char *src, const u_char **dnptrs,
+ const u_char **lastdnptr)
+{
+ while (dnptrs < lastdnptr && *dnptrs != NULL) {
+ if (*dnptrs >= src) {
+ *dnptrs = NULL;
+ break;
+ }
+ dnptrs++;
+ }
+}
+
+/*
* ns_name_skip(ptrptr, eom)
* Advance *ptrptr to skip over the compressed name it points at.
* return:
u_int n;
for (cpp = dnptrs; cpp < lastdnptr; cpp++) {
- dn = domain;
- sp = cp = *cpp;
- while ((n = *cp++) != 0) {
- /*
- * check for indirection
- */
- switch (n & NS_CMPRSFLGS) {
- case 0: /* normal case, n == len */
- if (n != *dn++)
- goto next;
- for ((void)NULL; n > 0; n--)
- if (mklower(*dn++) != mklower(*cp++))
+ sp = *cpp;
+ /*
+ * terminate search on:
+ * root label
+ * compression pointer
+ * unusable offset
+ */
+ while (*sp != 0 && (*sp & NS_CMPRSFLGS) == 0 &&
+ (sp - msg) < 0x4000) {
+ dn = domain;
+ cp = sp;
+ while ((n = *cp++) != 0) {
+ /*
+ * check for indirection
+ */
+ switch (n & NS_CMPRSFLGS) {
+ case 0: /* normal case, n == len */
+ if (n != *dn++)
goto next;
- /* Is next root for both ? */
- if (*dn == '\0' && *cp == '\0')
- return (sp - msg);
- if (*dn)
- continue;
- goto next;
-
- case NS_CMPRSFLGS: /* indirection */
- cp = msg + (((n & 0x3f) << 8) | *cp);
- break;
-
- default: /* illegal type */
- __set_errno (EMSGSIZE);
- return (-1);
+ for ((void)NULL; n > 0; n--)
+ if (mklower(*dn++) !=
+ mklower(*cp++))
+ goto next;
+ /* Is next root for both ? */
+ if (*dn == '\0' && *cp == '\0')
+ return (sp - msg);
+ if (*dn)
+ continue;
+ goto next;
+
+ case NS_CMPRSFLGS: /* indirection */
+ cp = msg + (((n & 0x3f) << 8) | *cp);
+ break;
+
+ default: /* illegal type */
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
}
+ next:
+ sp += *sp + 1;
}
- next: ;
}
__set_errno (ENOENT);
return (-1);
* SOFTWARE.
*/
-#ifndef lint
-static const char rcsid[] = "$Id$";
+#if !defined(_LIBC) && !defined(lint)
+static const char rcsid[] = "$BINDId: ns_netint.c,v 8.4 1999/10/13 16:39:35 vixie Exp $";
#endif
/* Import. */
* SOFTWARE.
*/
-#ifndef lint
-static const char rcsid[] = "$Id$";
+#if !defined(_LIBC) && !defined(lint)
+static const char rcsid[] = "$BINDId: ns_parse.c,v 8.13 1999/10/13 16:39:35 vixie Exp $";
#endif
/* Import. */
* SOFTWARE.
*/
-#ifndef lint
-static const char rcsid[] = "$Id$";
+#if !defined(_LIBC) && !defined(lint)
+static const char rcsid[] = "$BINDId: ns_print.c,v 8.18 2000/02/29 05:48:12 vixie Exp $";
#endif
/* Import. */
+
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
+#include <assert.h>
#include <errno.h>
#include <resolv.h>
#include <string.h>
char **buf, size_t *buflen);
/* Proto. */
+
#ifndef _LIBC
u_int16_t dst_s_dns_key_id(const u_char *, const int);
#endif
T(addstr("@\t\t\t", 4, &buf, &buflen));
} else {
T(addstr(name, len, &buf, &buflen));
- /* Origin not used and no trailing dot? */
- if ((!origin || !origin[0] || name[len] == '\0') &&
- name[len - 1] != '.') {
+ /* Origin not used or not root, and no trailing dot? */
+ if (((origin == NULL || origin[0] == '\0') ||
+ (origin[0] != '.' && origin[1] != '\0' &&
+ name[len] == '\0')) && name[len - 1] != '.') {
T(addstr(".", 1, &buf, &buflen));
len++;
}
n = SPRINTF((tmp, " ; key_tag= %u", key_id));
T(addstr(tmp, n, &buf, &buflen));
#endif /* !_LIBC */
+
break;
}
if (n < 0)
goto enospc; /* Guess. */
newlen = prune_origin(*buf, origin);
- if ((origin == NULL || origin[0] == '\0' || (*buf)[newlen] == '\0') &&
- (newlen == 0 || (*buf)[newlen - 1] != '.')) {
- /* No trailing dot. */
- if (newlen + 2 > *buflen)
- goto enospc; /* No room for ".\0". */
- (*buf)[newlen++] = '.';
- (*buf)[newlen] = '\0';
- }
if (newlen == 0) {
/* Use "@" instead of name. */
if (newlen + 2 > *buflen)
goto enospc; /* No room for "@\0". */
(*buf)[newlen++] = '@';
(*buf)[newlen] = '\0';
+ } else {
+ if (((origin == NULL || origin[0] == '\0') ||
+ (origin[0] != '.' && origin[1] != '\0' &&
+ (*buf)[newlen] == '\0')) && (*buf)[newlen - 1] != '.') {
+ /* No trailing dot. */
+ if (newlen + 2 > *buflen)
+ goto enospc; /* No room for ".\0". */
+ (*buf)[newlen++] = '.';
+ (*buf)[newlen] = '\0';
+ }
}
*pp += n;
addlen(newlen, buf, buflen);
static void
addlen(size_t len, char **buf, size_t *buflen) {
-#if 0
- INSIST(len <= *buflen);
-#endif
+ assert(len <= *buflen);
*buf += len;
*buflen -= len;
}
* SOFTWARE.
*/
-#ifndef lint
-static const char rcsid[] = "$Id$";
+#if !defined(_LIBC) && !defined(lint)
+static const char rcsid[] = "$BINDId: ns_samedomain.c,v 8.9 1999/10/15 21:06:51 vixie Exp $";
#endif
#include <sys/types.h>
* SOFTWARE.
*/
-#ifndef lint
-static const char rcsid[] = "$Id$";
+#if !defined(_LIBC) && !defined(lint)
+static const char rcsid[] = "$BINDId: ns_ttl.c,v 8.8 1999/10/13 16:39:36 vixie Exp $";
#endif
/* Import. */
+
#include <arpa/nameser.h>
#include <ctype.h>
/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: nsap_addr.c,v 8.10 1999/10/13 16:39:28 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
+
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
+
#include <ctype.h>
#include <resolv.h>
u_char c, nib;
u_int len = 0;
- while ((c = *ascii++) != '\0' && (int) len < maxlen) {
+ while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
if (c == '.' || c == '+' || c == '/')
continue;
if (!isascii(c))
/*
* Copyright (c) 1985, 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:
* 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
* 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
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_comp.c 8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_comp.c,v 8.15 1999/10/13 16:39:39 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
-
#include <ctype.h>
-#include <errno.h>
#include <resolv.h>
#include <stdio.h>
-
#include <string.h>
#include <unistd.h>
-
/*
* Expand compressed domain name 'comp_dn' to full domain name.
* 'msg' is a pointer to the begining of the message,
int nch = *dn++;
if (periodchar(ch)) {
- /* NULL */;
+ (void)NULL;
} else if (periodchar(pch)) {
if (!borderchar(ch))
return (0);
/* "." is a valid missing representation */
if (*dn == '\0')
- return(1);
+ return (1);
/* otherwise <label>.<hostname> */
while ((ch = *dn++) != '\0') {
u_int16_t _getshort(const u_char *src) { return (ns_get16(src)); }
#endif /*__ultrix__*/
#endif /*BIND_4_COMPAT*/
+\f
+
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2)
+# undef dn_expand
+weak_alias (__dn_expand, dn_expand);
+#endif
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_data.c,v 8.17 1999/10/13 17:11:31 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <ctype.h>
#include <netdb.h>
#include <resolv.h>
+#ifdef BIND_UPDATE
+#include <res_update.h>
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif
#ifndef __BIND_NOSTATIC
-
#ifdef _LIBC
extern struct __res_state _res;
#else
-/* The declaration has been moved to res_libc.c. */
+/* The definition has been moved to res_libc.c. */
struct __res_state _res
# if defined(__BIND_RES_TEXT)
= { RES_TIMEOUT, } /* Motorola, et al. */
void res_pquery(const res_state, const u_char *, int, FILE *);
#ifndef _LIBC
-/* Moved to res_libc.c since res_init should go into libc.so but the
+/* Moved to res_libc.c since res_init() should go into libc.so but the
rest of this file not. */
int
res_init(void) {
void
res_close(void) {
+#ifdef _LIBC
+ /*
+ * Some stupid programs out there call res_close() before res_init().
+ * Since _res._vcsock isn't explicitly initialized, these means that
+ * we could do a close(0), which might lead to some security problems.
+ * Therefore we check if res_init() was called before by looking at
+ * the RES_INIT bit in _res.options. If it hasn't been set we bail out
+ * early. */
+ if ((_res.options & RES_INIT) == 0)
+ return;
+#endif
res_nclose(&_res);
}
#endif /*ultrix*/
#endif
+\f
+
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2)
+# undef res_mkquery
+# undef res_query
+# undef res_querydomain
+# undef res_search
+weak_alias (__res_mkquery, res_mkquery);
+weak_alias (__res_query, res_query);
+weak_alias (__res_querydomain, res_querydomain);
+weak_alias (__res_search, res_search);
+#endif
/*
* Copyright (c) 1985
* 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:
* 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
/*
* 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
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_debug.c,v 8.34 2000/02/29 05:30:55 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
int pflag, FILE *file)
{
int n, sflag, rrnum;
- char buf[2048]; /* XXX need to malloc */
+ static int buflen = 2048;
+ char *buf;
ns_opcode opcode;
ns_rr rr;
if (statp->pfcode && !sflag)
return;
+ buf = malloc(buflen);
+ if (buf == NULL) {
+ fprintf(file, ";; memory allocation failure\n");
+ return;
+ }
+
opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
rrnum = 0;
for (;;) {
else if (rrnum > 0 && sflag != 0 &&
(statp->pfcode & RES_PRF_HEAD1))
putc('\n', file);
- return;
+ goto cleanup;
}
if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
fprintf(file, ";; %s SECTION:\n",
p_class(ns_rr_class(rr)));
else {
n = ns_sprintrr(handle, &rr, NULL, NULL,
- buf, sizeof buf);
+ buf, buflen);
if (n < 0) {
+ if (errno == ENOSPC) {
+ free(buf);
+ buf = NULL;
+ if (buflen < 131072)
+ buf = malloc(buflen += 1024);
+ if (buf == NULL) {
+ fprintf(file,
+ ";; memory allocation failure\n");
+ return;
+ }
+ continue;
+ }
fprintf(file, ";; ns_sprintrr: %s\n",
strerror(errno));
- return;
+ goto cleanup;
}
fputs(buf, file);
fputc('\n', file);
}
rrnum++;
}
+ cleanup:
+ if (buf != NULL)
+ free(buf);
}
/*
sym_ntos(const struct res_sym *syms, int number, int *success) {
static char unname[20];
-#ifdef _LIBC
- /* Changed to prevent warning. --drepper@gnu */
- for (; syms->name != 0; syms++) {
-#else
for ((void)NULL; syms->name != 0; syms++) {
-#endif
- if (number == syms->number) {
+ if (number == syms->number) {
if (success)
*success = 1;
return (syms->name);
sym_ntop(const struct res_sym *syms, int number, int *success) {
static char unname[20];
-#ifdef _LIBC
- /* Changed to prevent warning. --drepper@gnu */
- for (; syms->name != 0; syms++) {
-#else
for ((void)NULL; syms->name != 0; syms++) {
-#endif
if (number == syms->number) {
if (success)
*success = 1;
struct tm *time;
#ifdef HAVE_TIME_R
- struct time timebuf;
+ struct tm timebuf;
time = gmtime_r(&clock, &timebuf);
#else
/*
* Copyright (c) 1985, 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:
* 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
/*
* 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
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_init.c,v 8.16 2000/05/09 07:10:12 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
/* Options. Should all be left alone. */
#define RESOLVSORT
#define RFC1535
-#undef DEBUG
+/* #undef DEBUG */
-static void
-res_setoptions (res_state statp, const char *options, const char *source)
+static void res_setoptions (res_state, const char *, const char *)
internal_function;
-
#ifdef RESOLVSORT
static const char sort_mask[] = "/&";
#define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
statp->nscount = 1;
statp->ndots = 1;
statp->pfcode = 0;
- statp->_sock = -1;
+ statp->_vcsock = -1;
statp->_flags = 0;
statp->qhook = NULL;
statp->rhook = NULL;
+ statp->_u._ext.nscount = 0;
/* Allow user to override the local domain definition */
if ((cp = __secure_getenv("LOCALDOMAIN")) != NULL) {
static void
internal_function
-res_setoptions(res_state statp, const char *options, const char *source)
-{
+res_setoptions(res_state statp, const char *options, const char *source) {
const char *cp = options;
int i;
__gettimeofday(&now, NULL);
return (0xffff & (now.tv_sec ^ now.tv_usec ^ __getpid()));
}
+
+/*
+ * This routine is for closing the socket if a virtual circuit is used and
+ * the program wants to close it. This provides support for endhostent()
+ * which expects to close the socket.
+ *
+ * This routine is not expected to be user visible.
+ */
+void
+res_nclose(res_state statp) {
+ int ns;
+
+ if (statp->_vcsock >= 0) {
+ (void) close(statp->_vcsock);
+ statp->_vcsock = -1;
+ statp->_flags &= ~(RES_F_VC | RES_F_CONN);
+ }
+ for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
+ if (statp->_u._ext.nssocks[ns] != -1) {
+ (void) close(statp->_u._ext.nssocks[ns]);
+ statp->_u._ext.nssocks[ns] = -1;
+ }
+ }
+ statp->_u._ext.nscount = 0;
+}
* SOFTWARE.
*/
-/* Define some functions that go int libc.so. */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
-#endif /* LIBC_SCCS and not lint */
-
#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-
#include <netinet/in.h>
-#include <arpa/inet.h>
#include <arpa/nameser.h>
-
-#include <ctype.h>
-#include <netdb.h>
#include <resolv.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
+#undef _res
+
+/* The resolver state for use by single-threaded programs. */
+struct __res_state _res;
-/* This is the old res_init function. It has been moved from
- res_data.c to this file since res_init should go into libc.so but
- the rest of res_data not. */
+/* This function is used to access the resolver state in
+ single-threaded programs. */
+struct __res_state *
+weak_const_function
+__res_state (void)
+{
+ return &_res;
+}
+\f
+/* The following bit is copied from res_data.c (where it is #ifdef'ed
+ out) since res_init() should go into libc.so but the rest of that
+ file should not. */
int
res_init(void) {
return (__res_vinit(&_res, 1));
}
+\f
-/* We need a resolver context - in unthreaded apps, this weak function
- provides it. */
-
-#undef _res
-
-struct __res_state _res = { _sock : -1 };
-
+#include <shlib-compat.h>
-struct __res_state *
-weak_const_function
-__res_state(void)
-{
- return &_res;
-}
+#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2)
+# undef res_init
+weak_alias (__res_init, res_init);
+#endif
/*
* Copyright (c) 1985, 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:
* 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
/*
* 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
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_mkquery.c,v 8.12 1999/10/13 16:39:40 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
+ *
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_query.c 8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_query.c,v 8.20 2000/02/29 05:39:12 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
HEADER *hp = (HEADER *) answer;
char tmp[NS_MAXDNAME];
u_int dots;
- int trailing_dot, ret;
+ int trailing_dot, ret, saved_herrno;
int got_nodata = 0, got_servfail = 0, root_on_list = 0;
+ int tried_as_is = 0;
__set_errno (0);
RES_SET_H_ERRNO(statp, HOST_NOT_FOUND); /* True if we never query. */
return (res_nquery(statp, cp, class, type, answer, anslen));
/*
- * If there are enough dots in the name, do no searching.
- * (The threshold can be set with the "ndots" option.)
+ * If there are enough dots in the name, let's just give it a
+ * try 'as is'. The threshold can be set with the "ndots" option.
+ * Also, query 'as is', if there is a trailing dot in the name.
*/
- if (dots >= statp->ndots || trailing_dot)
- return (res_nquerydomain(statp, name, NULL, class, type,
- answer, anslen));
+ saved_herrno = -1;
+ if (dots >= statp->ndots || trailing_dot) {
+ ret = res_nquerydomain(statp, name, NULL, class, type,
+ answer, anslen);
+ if (ret > 0 || trailing_dot)
+ return (ret);
+ saved_herrno = h_errno;
+ tried_as_is++;
+ }
/*
* We do at least one level of search if
}
/*
- * If the name has any dots at all, and "." is not on the search
- * list, then try an as-is query now.
+ * If the name has any dots at all, and no earlier 'as-is' query
+ * for the name, and "." is not on the search list, then try an as-is
+ * query now.
*/
- if (statp->ndots) {
+ if (statp->ndots && !(tried_as_is || root_on_list)) {
ret = res_nquerydomain(statp, name, NULL, class, type,
answer, anslen);
if (ret > 0)
* else send back meaningless H_ERRNO, that being the one from
* the last DNSRCH we did.
*/
- if (got_nodata)
+ if (saved_herrno != -1)
+ RES_SET_H_ERRNO(statp, saved_herrno);
+ else if (got_nodata)
RES_SET_H_ERRNO(statp, NO_DATA);
else if (got_servfail)
RES_SET_H_ERRNO(statp, TRY_AGAIN);
/*
* Copyright (c) 1985, 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:
* 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
/*
* 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
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_send.c 8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_send.c,v 8.38 2000/03/30 20:16:51 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
/*
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/uio.h>
+#ifdef _LIBC
+#include <sys/poll.h>
+#endif
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <string.h>
#include <unistd.h>
-#include <sys/poll.h>
+#ifndef _LIBC
+#include <isc/eventlib.h>
+#else
-/* Options. Leave them on. */
-/* #undef DEBUG */
-#include "res_debug.h"
+/* From ev_streams.c. */
+
+static inline struct iovec
+evConsIovec(void *buf, size_t cnt) {
+ struct iovec ret;
-#ifdef NEED_PSELECT
-static int pselect(int, void *, void *, void *,
- struct timespec *,
- const sigset_t *);
-#endif
+ memset(&ret, 0xf5, sizeof ret);
+ ret.iov_base = buf;
+ ret.iov_len = cnt;
+ return (ret);
+}
-#define CHECK_SRVR_ADDR
+/* From ev_timers.c. */
-/* From bind lib/isc/ev_timers.c: */
#define BILLION 1000000000
-static struct timespec
+
+static inline struct timespec
evTimeSpec(struct timeval tv) {
- struct timespec ts;
+ struct timespec ts;
- ts.tv_sec = tv.tv_sec;
- ts.tv_nsec = tv.tv_usec * 1000;
- return (ts);
+ ts.tv_sec = tv.tv_sec;
+ ts.tv_nsec = tv.tv_usec * 1000;
+ return (ts);
}
-static struct timespec
+static inline struct timespec
evConsTime(time_t sec, long nsec) {
struct timespec x;
return (x);
}
-static struct timespec
+static inline struct timespec
evAddTime(struct timespec addend1, struct timespec addend2) {
struct timespec x;
return (x);
}
-static struct timespec
+static inline struct timespec
evSubTime(struct timespec minuend, struct timespec subtrahend) {
struct timespec x;
return (x);
}
-static int
+static inline int
evCmpTime(struct timespec a, struct timespec b) {
long x = a.tv_sec - b.tv_sec;
return (x < 0L ? (-1) : x > 0L ? (1) : (0));
}
-static struct timespec
+static inline struct timespec
evNowTime() {
struct timeval now;
return (evConsTime(0, 0));
return (evTimeSpec(now));
}
-/* End of code from bind lib/isc/ev_timers.c. */
-#ifdef DEBUG
- static void
- Aerror(const res_state statp, FILE *file, const char *string, int error,
- struct sockaddr_in address)
- {
- int save = errno;
+#endif
- if ((statp->options & RES_DEBUG) != 0) {
- char tmp[sizeof "255.255.255.255"];
+/* Options. Leave them on. */
+/* #undef DEBUG */
+#include "res_debug.h"
- fprintf(file, "res_send: %s ([%s].%u): %s\n",
- string,
- inet_ntop(address.sin_family, &address.sin_addr,
- tmp, sizeof tmp),
- ntohs(address.sin_port),
- strerror(error));
- }
- __set_errno (save);
- }
- static void
- Perror(const res_state statp, FILE *file, const char *string, int error) {
- int save = errno;
+#define EXT(res) ((res)->_u._ext)
- if ((statp->options & RES_DEBUG) != 0)
- fprintf(file, "res_send: %s: %s\n",
- string, strerror(error));
- __set_errno (save);
- }
+#ifndef _LIBC
+static const int highestFD = FD_SETSIZE - 1;
#endif
-static int cmpsock(struct sockaddr_in *a1, struct sockaddr_in *a2);
+/* Forward. */
+
+static int send_vc(res_state, const u_char *, int,
+ u_char *, int, int *, int);
+static int send_dg(res_state, const u_char *, int,
+ u_char *, int, int *, int,
+ int *, int *);
+#ifdef DEBUG
+static void Aerror(const res_state, FILE *, const char *, int,
+ struct sockaddr_in);
+static void Perror(const res_state, FILE *, const char *, int);
+#endif
+static int sock_eq(struct sockaddr_in *, struct sockaddr_in *);
+#ifdef NEED_PSELECT
+static int pselect(int, void *, void *, void *,
+ struct timespec *,
+ const sigset_t *);
+#endif
+
+/* Reachover. */
+
void res_pquery(const res_state, const u_char *, int, FILE *);
+/* Public. */
+
/* int
* res_isourserver(ina)
* looks up "ina" in _res.ns_addr_list[]
int ns;
ina = *inp;
- for (ns = 0; ns < statp->nscount; ns++) {
+ for (ns = 0; ns < statp->nscount; ns++) {
const struct sockaddr_in *srv = &statp->nsaddr_list[ns];
if (srv->sin_family == ina.sin_family &&
* Only header section present in replies to
* dynamic update packets.
*/
- if ( (((HEADER *)buf1)->opcode == ns_o_update) &&
- (((HEADER *)buf2)->opcode == ns_o_update) )
+ if ((((HEADER *)buf1)->opcode == ns_o_update) &&
+ (((HEADER *)buf2)->opcode == ns_o_update))
return (1);
if (qdcount != ntohs(((HEADER*)buf2)->qdcount))
res_nsend(res_state statp,
const u_char *buf, int buflen, u_char *ans, int anssiz)
{
- HEADER *hp = (HEADER *) buf;
- HEADER *anhp = (HEADER *) ans;
- int gotsomewhere, connreset, terrno, try, v_circuit, resplen, ns, n;
- u_int badns; /* XXX NSMAX can't exceed #/bits in this variable */
- static int highestFD = FD_SETSIZE - 1;
+ int gotsomewhere, terrno, try, v_circuit, resplen, ns, n;
+ if (statp->nscount == 0) {
+ __set_errno (ESRCH);
+ return (-1);
+ }
if (anssiz < HFIXEDSZ) {
__set_errno (EINVAL);
return (-1);
(stdout, ";; res_send()\n"), buf, buflen);
v_circuit = (statp->options & RES_USEVC) || buflen > PACKETSZ;
gotsomewhere = 0;
- connreset = 0;
terrno = ETIMEDOUT;
- badns = 0;
/*
- * Some callers want to even out the load on their resolver list.
+ * If the ns_addr_list in the resolver context has changed, then
+ * invalidate our cached copy and the associated timing data.
*/
- if (statp->nscount > 0 && (statp->options & RES_ROTATE) != 0) {
+ if (EXT(statp).nscount != 0) {
+ int needclose = 0;
+
+ if (EXT(statp).nscount != statp->nscount)
+ needclose++;
+ else
+ for (ns = 0; ns < statp->nscount; ns++)
+ if (!sock_eq(&statp->nsaddr_list[ns],
+ &EXT(statp).nsaddrs[ns])) {
+ needclose++;
+ break;
+ }
+ if (needclose)
+ res_nclose(statp);
+ }
+
+ /*
+ * Maybe initialize our private copy of the ns_addr_list.
+ */
+ if (EXT(statp).nscount == 0) {
+ for (ns = 0; ns < statp->nscount; ns++) {
+ EXT(statp).nsaddrs[ns] = statp->nsaddr_list[ns];
+ EXT(statp).nstimes[ns] = RES_MAXTIME;
+ EXT(statp).nssocks[ns] = -1;
+ }
+ EXT(statp).nscount = statp->nscount;
+ }
+
+ /*
+ * Some resolvers want to even out the load on their nameservers.
+ * Note that RES_BLAST overrides RES_ROTATE.
+ */
+ if ((statp->options & RES_ROTATE) != 0 &&
+ (statp->options & RES_BLAST) == 0) {
struct sockaddr_in ina;
int lastns = statp->nscount - 1;
}
/*
- * Send request, RETRY times, or until successful
+ * Send request, RETRY times, or until successful.
*/
for (try = 0; try < statp->retry; try++) {
for (ns = 0; ns < statp->nscount; ns++) {
struct sockaddr_in *nsap = &statp->nsaddr_list[ns];
same_ns:
- if (badns & (1 << ns)) {
- res_nclose(statp);
- goto next_ns;
- }
-
if (statp->qhook) {
int done = 0, loops = 0;
ns + 1, inet_ntoa(nsap->sin_addr)));
if (v_circuit) {
- int truncated;
- struct iovec iov[2];
- u_short len;
- u_char *cp;
-
/* Use VC; at most one attempt per server. */
try = statp->retry;
- truncated = 0;
-
- /* Are we still talking to whom we want to talk to? */
- if (statp->_sock >= 0 &&
- (statp->_flags & RES_F_VC) != 0) {
- struct sockaddr_in peer;
- int size = sizeof(peer);
-
- if (getpeername(statp->_sock,
- (struct sockaddr *)&peer,
- &size) < 0) {
- res_nclose(statp);
- statp->_flags &= ~RES_F_VC;
- } else if (!cmpsock(&peer, nsap)) {
- res_nclose(statp);
- statp->_flags &= ~RES_F_VC;
- }
- }
-
- if (statp->_sock < 0 ||
- (statp->_flags & RES_F_VC) == 0) {
- if (statp->_sock >= 0)
- res_nclose(statp);
-
- statp->_sock = socket(PF_INET,
- SOCK_STREAM, 0);
- if (statp->_sock < 0 ||
- statp->_sock > highestFD) {
- terrno = errno;
- Perror(statp, stderr,
- "socket(vc)", errno);
- return (-1);
- }
- __set_errno (0);
- if (connect(statp->_sock,
- (struct sockaddr *)nsap,
- sizeof *nsap) < 0) {
- terrno = errno;
- Aerror(statp, stderr, "connect/vc",
- errno, *nsap);
- badns |= (1 << ns);
- res_nclose(statp);
- goto next_ns;
- }
- statp->_flags |= RES_F_VC;
- }
- /*
- * Send length & message
- */
- putshort((u_short)buflen, (u_char*)&len);
- iov[0].iov_base = (caddr_t)&len;
- iov[0].iov_len = INT16SZ;
- iov[1].iov_base = (caddr_t)buf;
- iov[1].iov_len = buflen;
- if (writev(statp->_sock, iov, 2) !=
- (INT16SZ + buflen)) {
- terrno = errno;
- Perror(statp, stderr, "write failed", errno);
- badns |= (1 << ns);
- res_nclose(statp);
+ n = send_vc(statp, buf, buflen, ans, anssiz, &terrno,
+ ns);
+ if (n < 0)
+ return (-1);
+ if (n == 0)
goto next_ns;
- }
- /*
- * Receive length & response
- */
- read_len:
- cp = ans;
- len = INT16SZ;
- while ((n = read(statp->_sock,
- (char *)cp, (int)len)) > 0) {
- cp += n;
- if ((len -= n) <= 0)
- break;
- }
- if (n <= 0) {
- terrno = errno;
- Perror(statp, stderr, "read failed", errno);
- res_nclose(statp);
- /*
- * A long running process might get its TCP
- * connection reset if the remote server was
- * restarted. Requery the server instead of
- * trying a new one. When there is only one
- * server, this means that a query might work
- * instead of failing. We only allow one reset
- * per query to prevent looping.
- */
- if (terrno == ECONNRESET && !connreset) {
- connreset = 1;
- res_nclose(statp);
- goto same_ns;
- }
- res_nclose(statp);
- goto next_ns;
- }
- resplen = ns_get16(ans);
- if (resplen > anssiz) {
- Dprint(statp->options & RES_DEBUG,
- (stdout, ";; response truncated\n")
- );
- truncated = 1;
- len = anssiz;
- } else
- len = resplen;
- if (len < HFIXEDSZ) {
- /*
- * Undersized message.
- */
- Dprint(statp->options & RES_DEBUG,
- (stdout, ";; undersized: %d\n", len));
- terrno = EMSGSIZE;
- badns |= (1 << ns);
- res_nclose(statp);
- goto next_ns;
- }
- cp = ans;
- while (len != 0 &&
- (n = read(statp->_sock, (char *)cp, (int)len))
- > 0) {
- cp += n;
- len -= n;
- }
- if (n <= 0) {
- terrno = errno;
- Perror(statp, stderr, "read(vc)", errno);
- res_nclose(statp);
- goto next_ns;
- }
- if (truncated) {
- /*
- * Flush rest of answer
- * so connection stays in synch.
- */
- anhp->tc = 1;
- len = resplen - anssiz;
- while (len != 0) {
- char junk[PACKETSZ];
-
- n = ((size_t)len > sizeof(junk)
- ? sizeof(junk)
- : len);
- n = read(statp->_sock, junk, n);
- if (n > 0)
- len -= n;
- else
- break;
- }
- }
- /*
- * The calling applicating has bailed out of
- * a previous call and failed to arrange to have
- * the circuit closed or the server has got
- * itself confused. Anyway drop the packet and
- * wait for the correct one.
- */
- if (hp->id != anhp->id) {
- DprintQ((statp->options & RES_DEBUG) ||
- (statp->pfcode & RES_PRF_REPLY),
- (stdout, ";; old answer (unexpected):\n"),
- ans, (resplen>anssiz)?anssiz:resplen);
- goto read_len;
- }
+ resplen = n;
} else {
- /*
- * Use datagrams.
- */
- struct timespec start, timeout, finish;
-#ifdef _LIBC
- struct pollfd pfd[1];
- int ptimeout;
-#else
- fd_set dsmask;
-#endif
- struct sockaddr_in from;
- int fromlen, seconds;
-
- if (statp->_sock < 0 ||
- (statp->_flags & RES_F_VC) != 0) {
- if ((statp->_flags & RES_F_VC) != 0)
- res_nclose(statp);
- statp->_sock = socket(PF_INET, SOCK_DGRAM, 0);
- if (statp->_sock < 0 ||
- statp->_sock > highestFD) {
-#ifndef CAN_RECONNECT
- bad_dg_sock:
-#endif
- terrno = errno;
- Perror(statp, stderr,
- "socket(dg)", errno);
- return (-1);
- }
- statp->_flags &= ~RES_F_CONN;
- }
-#ifndef CANNOT_CONNECT_DGRAM
- /*
- * On a 4.3BSD+ machine (client and server,
- * actually), sending to a nameserver datagram
- * port with no nameserver will cause an
- * ICMP port unreachable message to be returned.
- * If our datagram socket is "connected" to the
- * server, we get an ECONNREFUSED error on the next
- * socket operation, and select returns if the
- * error message is received. We can thus detect
- * the absence of a nameserver without timing out.
- * If we have sent queries to at least two servers,
- * however, we don't want to remain connected,
- * as we wish to receive answers from the first
- * server to respond.
- */
- if (statp->nscount == 1 || (try == 0 && ns == 0)) {
- /*
- * Connect only if we are sure we won't
- * receive a response from another server.
- */
- if ((statp->_flags & RES_F_CONN) == 0) {
- if (connect(statp->_sock,
- (struct sockaddr *)nsap,
- sizeof *nsap) < 0) {
- Aerror(statp, stderr,
- "connect(dg)",
- errno, *nsap);
- badns |= (1 << ns);
- res_nclose(statp);
- goto next_ns;
- }
- statp->_flags |= RES_F_CONN;
- }
- if (send(statp->_sock, (char*)buf, buflen, 0)
- != buflen) {
- Perror(statp, stderr, "send", errno);
- badns |= (1 << ns);
- res_nclose(statp);
- goto next_ns;
- }
- } else {
- /*
- * Disconnect if we want to listen
- * for responses from more than one server.
- */
- if ((statp->_flags & RES_F_CONN) != 0) {
-#ifdef CAN_RECONNECT
- struct sockaddr_in no_addr;
-
- no_addr.sin_family = AF_INET;
- no_addr.sin_addr.s_addr = INADDR_ANY;
- no_addr.sin_port = 0;
- (void) connect(statp->_sock,
- (struct sockaddr *)
- &no_addr,
- sizeof no_addr);
-#else
- struct sockaddr_in local_addr;
- int len, result, s1;
-
- len = sizeof(local_addr);
- s1 = socket(PF_INET, SOCK_DGRAM, 0);
- result = getsockname(statp->_sock,
- (struct sockaddr *)&local_addr,
- &len);
- if (s1 < 0)
- goto bad_dg_sock;
- (void) dup2(s1, statp->_sock);
- (void) close(s1);
- if (result == 0) {
- /*
- * Attempt to rebind to old
- * port. Note connected socket
- * has an sin_addr set.
- */
- local_addr.sin_addr.s_addr =
- htonl(0);
- (void)bind(statp->_sock,
- (struct sockaddr *)
- &local_addr, len);
- }
- Dprint(statp->options & RES_DEBUG,
- (stdout, ";; new DG socket\n"))
-#endif /* CAN_RECONNECT */
- statp->_flags &= ~RES_F_CONN;
- __set_errno (0);
- }
-#endif /* !CANNOT_CONNECT_DGRAM */
- if (sendto(statp->_sock,
- (char*)buf, buflen, 0,
- (struct sockaddr *)nsap,
- sizeof *nsap)
- != buflen) {
- Aerror(statp, stderr, "sendto", errno, *nsap);
- badns |= (1 << ns);
- res_nclose(statp);
- goto next_ns;
- }
-#ifndef CANNOT_CONNECT_DGRAM
- }
-#endif /* !CANNOT_CONNECT_DGRAM */
-
- if (statp->_sock < 0 || statp->_sock > highestFD) {
- Perror(statp, stderr,
- "fd out-of-bounds", EMFILE);
- res_nclose(statp);
+ /* Use datagrams. */
+ n = send_dg(statp, buf, buflen, ans, anssiz, &terrno,
+ ns, &v_circuit, &gotsomewhere);
+ if (n < 0)
+ return (-1);
+ if (n == 0)
goto next_ns;
- }
-
- /*
- * Wait for reply
- */
- seconds = (statp->retrans << try);
- if (try > 0)
- seconds /= statp->nscount;
- if (seconds <= 0)
- seconds = 1;
-
- start = evNowTime();
- timeout = evConsTime(seconds, 0);
- finish = evAddTime(start, timeout);
- wait:
-#ifdef _LIBC
- /* Convert struct timespec in milliseconds. */
- ptimeout = timeout.tv_sec * 1000
- + timeout.tv_nsec / 1000000;
-
- pfd[0].fd = statp->_sock;
- pfd[0].events = POLLIN;
- n = __poll (pfd, 1, ptimeout);
-#else
- FD_ZERO(&dsmask);
- FD_SET(statp->_sock, &dsmask);
- n = pselect(statp->_sock + 1,
- &dsmask, NULL, NULL,
- &timeout, NULL);
-#endif
- if (n == 0) {
- Dprint(statp->options & RES_DEBUG,
- (stdout, ";; timeout\n"));
- gotsomewhere = 1;
- goto next_ns;
- }
- if (n < 0) {
- if (errno == EINTR) {
- struct timespec now;
-
- now = evNowTime();
- if (evCmpTime(finish, now) >= 0) {
- timeout = evSubTime(finish,
- now);
- goto wait;
- }
- }
-#ifdef _LIBC
- Perror(statp, stderr, "poll", errno);
-#else
- Perror(statp, stderr, "select", errno);
-#endif
- res_nclose(statp);
- goto next_ns;
- }
- __set_errno (0);
- fromlen = sizeof(struct sockaddr_in);
- resplen = recvfrom(statp->_sock, (char*)ans, anssiz,0,
- (struct sockaddr *)&from, &fromlen);
- if (resplen <= 0) {
- Perror(statp, stderr, "recvfrom", errno);
- res_nclose(statp);
- goto next_ns;
- }
- gotsomewhere = 1;
- if (resplen < HFIXEDSZ) {
- /*
- * Undersized message.
- */
- Dprint(statp->options & RES_DEBUG,
- (stdout, ";; undersized: %d\n",
- resplen));
- terrno = EMSGSIZE;
- badns |= (1 << ns);
- res_nclose(statp);
- goto next_ns;
- }
- if (hp->id != anhp->id) {
- /*
- * response from old query, ignore it.
- * XXX - potential security hazard could
- * be detected here.
- */
- DprintQ((statp->options & RES_DEBUG) ||
- (statp->pfcode & RES_PRF_REPLY),
- (stdout, ";; old answer:\n"),
- ans, (resplen>anssiz)?anssiz:resplen);
- goto wait;
- }
-#ifdef CHECK_SRVR_ADDR
- if (!(statp->options & RES_INSECURE1) &&
- !res_ourserver_p(statp, &from)) {
- /*
- * response from wrong server? ignore it.
- * XXX - potential security hazard could
- * be detected here.
- */
- DprintQ((statp->options & RES_DEBUG) ||
- (statp->pfcode & RES_PRF_REPLY),
- (stdout, ";; not our server:\n"),
- ans, (resplen>anssiz)?anssiz:resplen);
- goto wait;
- }
-#endif
- if (!(statp->options & RES_INSECURE2) &&
- !res_queriesmatch(buf, buf + buflen,
- ans, ans + anssiz)) {
- /*
- * response contains wrong query? ignore it.
- * XXX - potential security hazard could
- * be detected here.
- */
- DprintQ((statp->options & RES_DEBUG) ||
- (statp->pfcode & RES_PRF_REPLY),
- (stdout, ";; wrong query name:\n"),
- ans, (resplen>anssiz)?anssiz:resplen);
- goto wait;
- }
- if (anhp->rcode == SERVFAIL ||
- anhp->rcode == NOTIMP ||
- anhp->rcode == REFUSED) {
- DprintQ(statp->options & RES_DEBUG,
- (stdout, "server rejected query:\n"),
- ans, (resplen>anssiz)?anssiz:resplen);
- badns |= (1 << ns);
- res_nclose(statp);
- /* don't retry if called from dig */
- if (!statp->pfcode)
- goto next_ns;
- }
- if (!(statp->options & RES_IGNTC) && anhp->tc) {
- /*
- * get rest of answer;
- * use TCP with same server.
- */
- Dprint(statp->options & RES_DEBUG,
- (stdout, ";; truncated answer\n"));
- v_circuit = 1;
- res_nclose(statp);
+ if (v_circuit)
goto same_ns;
- }
- } /*if vc/dg*/
+ resplen = n;
+ }
+
Dprint((statp->options & RES_DEBUG) ||
((statp->pfcode & RES_PRF_REPLY) &&
(statp->pfcode & RES_PRF_HEAD1)),
(stdout, ";; got answer:\n"));
+
DprintQ((statp->options & RES_DEBUG) ||
(statp->pfcode & RES_PRF_REPLY),
(stdout, ""),
- ans, (resplen>anssiz)?anssiz:resplen);
+ ans, (resplen > anssiz) ? anssiz : resplen);
+
/*
- * If using virtual circuits, we assume that the first server
- * is preferred over the rest (i.e. it is on the local
- * machine) and only keep that one open.
* If we have temporarily opened a virtual circuit,
* or if we haven't been asked to keep a socket open,
* close the socket.
*/
- if ((v_circuit && (!(statp->options & RES_USEVC) || ns != 0)) ||
- !(statp->options & RES_STAYOPEN)) {
+ if ((v_circuit && (statp->options & RES_USEVC) == 0) ||
+ (statp->options & RES_STAYOPEN) == 0) {
res_nclose(statp);
}
if (statp->rhook) {
return (-1);
}
-/*
- * This routine is for closing the socket if a virtual circuit is used and
- * the program wants to close it. This provides support for endhostent()
- * which expects to close the socket.
- *
- * This routine is not expected to be user visible.
- */
-void
-res_nclose(res_state statp) {
- if (statp->_sock >= 0) {
- (void) close(statp->_sock);
- statp->_sock = -1;
- statp->_flags &= ~(RES_F_VC | RES_F_CONN);
+/* Private */
+
+static int
+send_vc(res_state statp,
+ const u_char *buf, int buflen, u_char *ans, int anssiz,
+ int *terrno, int ns)
+{
+ const HEADER *hp = (HEADER *) buf;
+ HEADER *anhp = (HEADER *) ans;
+ struct sockaddr_in *nsap = &statp->nsaddr_list[ns];
+ int truncating, connreset, resplen, n;
+ struct iovec iov[2];
+ u_short len;
+ u_char *cp;
+
+ connreset = 0;
+ same_ns:
+ truncating = 0;
+
+ /* Are we still talking to whom we want to talk to? */
+ if (statp->_vcsock >= 0 && (statp->_flags & RES_F_VC) != 0) {
+ struct sockaddr_in peer;
+ int size = sizeof peer;
+
+ if (getpeername(statp->_vcsock,
+ (struct sockaddr *)&peer, &size) < 0 ||
+ !sock_eq(&peer, nsap)) {
+ res_nclose(statp);
+ statp->_flags &= ~RES_F_VC;
+ }
+ }
+
+ if (statp->_vcsock < 0 || (statp->_flags & RES_F_VC) == 0) {
+ if (statp->_vcsock >= 0)
+ res_nclose(statp);
+
+ statp->_vcsock = socket(PF_INET, SOCK_STREAM, 0);
+#ifndef _LIBC
+ if (statp->_vcsock > highestFD) {
+ res_nclose(statp);
+ __set_errno (ENOTSOCK);
+ }
+#endif
+ if (statp->_vcsock < 0) {
+ *terrno = errno;
+ Perror(statp, stderr, "socket(vc)", errno);
+ return (-1);
+ }
+ __set_errno (0);
+ if (connect(statp->_vcsock, (struct sockaddr *)nsap,
+ sizeof *nsap) < 0) {
+ *terrno = errno;
+ Aerror(statp, stderr, "connect/vc", errno, *nsap);
+ res_nclose(statp);
+ return (0);
+ }
+ statp->_flags |= RES_F_VC;
}
+
+ /*
+ * Send length & message
+ */
+ putshort((u_short)buflen, (u_char*)&len);
+ iov[0] = evConsIovec(&len, INT16SZ);
+ iov[1] = evConsIovec((void*)buf, buflen);
+ if (writev(statp->_vcsock, iov, 2) != (INT16SZ + buflen)) {
+ *terrno = errno;
+ Perror(statp, stderr, "write failed", errno);
+ res_nclose(statp);
+ return (0);
+ }
+ /*
+ * Receive length & response
+ */
+ read_len:
+ cp = ans;
+ len = INT16SZ;
+ while ((n = read(statp->_vcsock, (char *)cp, (int)len)) > 0) {
+ cp += n;
+ if ((len -= n) <= 0)
+ break;
+ }
+ if (n <= 0) {
+ *terrno = errno;
+ Perror(statp, stderr, "read failed", errno);
+ res_nclose(statp);
+ /*
+ * A long running process might get its TCP
+ * connection reset if the remote server was
+ * restarted. Requery the server instead of
+ * trying a new one. When there is only one
+ * server, this means that a query might work
+ * instead of failing. We only allow one reset
+ * per query to prevent looping.
+ */
+ if (*terrno == ECONNRESET && !connreset) {
+ connreset = 1;
+ res_nclose(statp);
+ goto same_ns;
+ }
+ res_nclose(statp);
+ return (0);
+ }
+ resplen = ns_get16(ans);
+ if (resplen > anssiz) {
+ Dprint(statp->options & RES_DEBUG,
+ (stdout, ";; response truncated\n")
+ );
+ truncating = 1;
+ len = anssiz;
+ } else
+ len = resplen;
+ if (len < HFIXEDSZ) {
+ /*
+ * Undersized message.
+ */
+ Dprint(statp->options & RES_DEBUG,
+ (stdout, ";; undersized: %d\n", len));
+ *terrno = EMSGSIZE;
+ res_nclose(statp);
+ return (0);
+ }
+ cp = ans;
+ while (len != 0 && (n = read(statp->_vcsock, (char *)cp, (int)len)) > 0){
+ cp += n;
+ len -= n;
+ }
+ if (n <= 0) {
+ *terrno = errno;
+ Perror(statp, stderr, "read(vc)", errno);
+ res_nclose(statp);
+ return (0);
+ }
+ if (truncating) {
+ /*
+ * Flush rest of answer so connection stays in synch.
+ */
+ anhp->tc = 1;
+ len = resplen - anssiz;
+ while (len != 0) {
+ char junk[PACKETSZ];
+
+ n = read(statp->_vcsock, junk,
+ (len > sizeof junk) ? sizeof junk : len);
+ if (n > 0)
+ len -= n;
+ else
+ break;
+ }
+ }
+ /*
+ * If the calling applicating has bailed out of
+ * a previous call and failed to arrange to have
+ * the circuit closed or the server has got
+ * itself confused, then drop the packet and
+ * wait for the correct one.
+ */
+ if (hp->id != anhp->id) {
+ DprintQ((statp->options & RES_DEBUG) ||
+ (statp->pfcode & RES_PRF_REPLY),
+ (stdout, ";; old answer (unexpected):\n"),
+ ans, (resplen > anssiz) ? anssiz: resplen);
+ goto read_len;
+ }
+
+ /*
+ * All is well, or the error is fatal. Signal that the
+ * next nameserver ought not be tried.
+ */
+ return (resplen);
}
-/* Private */
static int
-cmpsock(struct sockaddr_in *a1, struct sockaddr_in *a2) {
+send_dg(res_state statp,
+ const u_char *buf, int buflen, u_char *ans, int anssiz,
+ int *terrno, int ns, int *v_circuit, int *gotsomewhere)
+{
+ const HEADER *hp = (HEADER *) buf;
+ HEADER *anhp = (HEADER *) ans;
+ const struct sockaddr_in *nsap = &statp->nsaddr_list[ns];
+ struct timespec now, timeout, finish;
+#ifdef _LIBC
+ struct pollfd pfd[1];
+ int ptimeout;
+#else
+ fd_set dsmask;
+#endif
+ struct sockaddr_in from;
+ int fromlen, resplen, seconds, n, s;
+
+ if (EXT(statp).nssocks[ns] == -1) {
+ EXT(statp).nssocks[ns] = socket(PF_INET, SOCK_DGRAM, 0);
+#ifndef _LIBC
+ if (EXT(statp).nssocks[ns] > highestFD) {
+ res_nclose(statp);
+ __set_errno (ENOTSOCK);
+ }
+#endif
+ if (EXT(statp).nssocks[ns] < 0) {
+ *terrno = errno;
+ Perror(statp, stderr, "socket(dg)", errno);
+ return (-1);
+ }
+#ifndef CANNOT_CONNECT_DGRAM
+ /*
+ * On a 4.3BSD+ machine (client and server,
+ * actually), sending to a nameserver datagram
+ * port with no nameserver will cause an
+ * ICMP port unreachable message to be returned.
+ * If our datagram socket is "connected" to the
+ * server, we get an ECONNREFUSED error on the next
+ * socket operation, and select returns if the
+ * error message is received. We can thus detect
+ * the absence of a nameserver without timing out.
+ */
+ if (connect(EXT(statp).nssocks[ns], (struct sockaddr *)nsap,
+ sizeof *nsap) < 0) {
+ Aerror(statp, stderr, "connect(dg)", errno, *nsap);
+ res_nclose(statp);
+ return (0);
+ }
+#endif /* !CANNOT_CONNECT_DGRAM */
+ Dprint(statp->options & RES_DEBUG,
+ (stdout, ";; new DG socket\n"))
+ }
+ s = EXT(statp).nssocks[ns];
+#ifndef CANNOT_CONNECT_DGRAM
+ if (send(s, (char*)buf, buflen, 0) != buflen) {
+ Perror(statp, stderr, "send", errno);
+ res_nclose(statp);
+ return (0);
+ }
+#else /* !CANNOT_CONNECT_DGRAM */
+ if (sendto(s, (char*)buf, buflen, 0,
+ (struct sockaddr *)nsap, sizeof *nsap) != buflen)
+ {
+ Aerror(statp, stderr, "sendto", errno, *nsap);
+ res_nclose(statp);
+ return (0);
+ }
+#endif /* !CANNOT_CONNECT_DGRAM */
+
+ /*
+ * Wait for reply.
+ */
+ seconds = (statp->retrans << ns);
+ if (ns > 0)
+ seconds /= statp->nscount;
+ if (seconds <= 0)
+ seconds = 1;
+ now = evNowTime();
+ timeout = evConsTime(seconds, 0);
+ finish = evAddTime(now, timeout);
+ wait:
+#ifdef _LIBC
+ /* Convert struct timespec in milliseconds. */
+ ptimeout = timeout.tv_sec * 1000 + timeout.tv_nsec / 1000000;
+
+ pfd[0].fd = s;
+ pfd[0].events = POLLIN;
+ n = __poll (pfd, 1, ptimeout);
+#else
+ FD_ZERO(&dsmask);
+ FD_SET(s, &dsmask);
+ n = pselect(s + 1, &dsmask, NULL, NULL, &timeout, NULL);
+#endif
+ if (n == 0) {
+ Dprint(statp->options & RES_DEBUG, (stdout, ";; timeout\n"));
+ *gotsomewhere = 1;
+ return (0);
+ }
+ if (n < 0) {
+ if (errno == EINTR) {
+ now = evNowTime();
+ if (evCmpTime(finish, now) > 0) {
+ timeout = evSubTime(finish, now);
+ goto wait;
+ }
+ }
+ Perror(statp, stderr, "select", errno);
+ res_nclose(statp);
+ return (0);
+ }
+ __set_errno (0);
+ fromlen = sizeof(struct sockaddr_in);
+ resplen = recvfrom(s, (char*)ans, anssiz,0,
+ (struct sockaddr *)&from, &fromlen);
+ if (resplen <= 0) {
+ Perror(statp, stderr, "recvfrom", errno);
+ res_nclose(statp);
+ return (0);
+ }
+ *gotsomewhere = 1;
+ if (resplen < HFIXEDSZ) {
+ /*
+ * Undersized message.
+ */
+ Dprint(statp->options & RES_DEBUG,
+ (stdout, ";; undersized: %d\n",
+ resplen));
+ *terrno = EMSGSIZE;
+ res_nclose(statp);
+ return (0);
+ }
+ if (hp->id != anhp->id) {
+ /*
+ * response from old query, ignore it.
+ * XXX - potential security hazard could
+ * be detected here.
+ */
+ DprintQ((statp->options & RES_DEBUG) ||
+ (statp->pfcode & RES_PRF_REPLY),
+ (stdout, ";; old answer:\n"),
+ ans, (resplen > anssiz) ? anssiz : resplen);
+ goto wait;
+ }
+ if (!(statp->options & RES_INSECURE1) &&
+ !res_ourserver_p(statp, &from)) {
+ /*
+ * response from wrong server? ignore it.
+ * XXX - potential security hazard could
+ * be detected here.
+ */
+ DprintQ((statp->options & RES_DEBUG) ||
+ (statp->pfcode & RES_PRF_REPLY),
+ (stdout, ";; not our server:\n"),
+ ans, (resplen > anssiz) ? anssiz : resplen);
+ goto wait;
+ }
+ if (!(statp->options & RES_INSECURE2) &&
+ !res_queriesmatch(buf, buf + buflen,
+ ans, ans + anssiz)) {
+ /*
+ * response contains wrong query? ignore it.
+ * XXX - potential security hazard could
+ * be detected here.
+ */
+ DprintQ((statp->options & RES_DEBUG) ||
+ (statp->pfcode & RES_PRF_REPLY),
+ (stdout, ";; wrong query name:\n"),
+ ans, (resplen > anssiz) ? anssiz : resplen);
+ goto wait;
+ }
+ if (anhp->rcode == SERVFAIL ||
+ anhp->rcode == NOTIMP ||
+ anhp->rcode == REFUSED) {
+ DprintQ(statp->options & RES_DEBUG,
+ (stdout, "server rejected query:\n"),
+ ans, (resplen > anssiz) ? anssiz : resplen);
+ res_nclose(statp);
+ /* don't retry if called from dig */
+ if (!statp->pfcode)
+ return (0);
+ }
+ if (!(statp->options & RES_IGNTC) && anhp->tc) {
+ /*
+ * To get the rest of answer,
+ * use TCP with same server.
+ */
+ Dprint(statp->options & RES_DEBUG,
+ (stdout, ";; truncated answer\n"));
+ *v_circuit = 1;
+ res_nclose(statp);
+ return (1);
+ }
+ /*
+ * All is well, or the error is fatal. Signal that the
+ * next nameserver ought not be tried.
+ */
+ return (resplen);
+}
+
+#ifdef DEBUG
+static void
+Aerror(const res_state statp, FILE *file, const char *string, int error,
+ struct sockaddr_in address)
+{
+ int save = errno;
+
+ if ((statp->options & RES_DEBUG) != 0) {
+ char tmp[sizeof "255.255.255.255"];
+
+ fprintf(file, "res_send: %s ([%s].%u): %s\n",
+ string,
+ inet_ntop(address.sin_family, &address.sin_addr,
+ tmp, sizeof tmp),
+ ntohs(address.sin_port),
+ strerror(error));
+ }
+ __set_errno (save);
+}
+
+static void
+Perror(const res_state statp, FILE *file, const char *string, int error) {
+ int save = errno;
+
+ if ((statp->options & RES_DEBUG) != 0)
+ fprintf(file, "res_send: %s: %s\n",
+ string, strerror(error));
+ __set_errno (save);
+}
+#endif
+
+static int
+sock_eq(struct sockaddr_in *a1, struct sockaddr_in *a2) {
return ((a1->sin_family == a2->sin_family) &&
(a1->sin_port == a2->sin_port) &&
(a1->sin_addr.s_addr == a2->sin_addr.s_addr));
/* XXX needs to move to the porting library. */
static int
pselect(int nfds, void *rfds, void *wfds, void *efds,
- struct timespec *tsp,
- const sigset_t *sigmask)
+ struct timespec *tsp, const sigset_t *sigmask)
{
struct timeval tv, *tvp;
sigset_t sigs;
/*
- * ++Copyright++ 1983, 1987, 1989, 1993
- * -
- * Copyright (c) 1983, 1987, 1989, 1993
+ * 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:
* 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
* 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
- * $Id$
+ * $BINDId: resolv.h,v 8.31 2000/03/30 20:16:50 vixie Exp $
*/
-#ifndef _RESOLV_H
-#define _RESOLV_H 1
-
-#include <features.h>
+#ifndef _RESOLV_H_
+#define _RESOLV_H_
#include <sys/param.h>
#if (!defined(BSD)) || (BSD < 199306)
#else
# include <sys/types.h>
#endif
+#include <sys/cdefs.h>
#include <stdio.h>
+
#include <netinet/in.h>
+#include <arpa/nameser.h>
/*
* Revision information. This is the release date in YYYYMMDD format.
#define __RES 19991006
/*
- * 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) \
- do \
- { \
- (r)->res_h_errno = x; \
- __set_h_errno(x); \
- } \
- while (0)
-
-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.
+ * inital name server(s) to query and the domain search list.
*/
#ifndef _PATH_RESCONF
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_qhook)__P((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);
+typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns,
+ const u_char *query,
+ int querylen,
+ u_char *ans,
+ int anssiz,
+ int *resplen));
struct res_sym {
int number; /* Identifying number, like T_MX */
#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 {
- int retrans; /* retransmission time interval */
+ 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 */
res_send_qhook qhook; /* query hook */
res_send_rhook rhook; /* response hook */
int res_h_errno; /* last one set for this context */
- int _sock; /* PRIVATE: for res_send i/o */
+ int _vcsock; /* PRIVATE: for res_send VC i/o */
u_int _flags; /* PRIVATE: see below */
- char pad[52]; /* On an i386 this means 512b total. */
+ union {
+ char pad[52]; /* On an i386 this means 512b total. */
+ struct {
+ u_int16_t nscount;
+ u_int16_t nstimes[MAXNS]; /* ms. */
+ int nssocks[MAXNS];
+ struct sockaddr_in nsaddrs[MAXNS];
+ } _ext;
+ } _u;
};
typedef struct __res_state *res_state;
#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_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
*/
#define RES_PRF_STATS 0x00000001
#define RES_PRF_UPDATE 0x00000002
-#define RES_PRF_CLASS 0x00000004
+#define RES_PRF_CLASS 0x00000004
#define RES_PRF_CMD 0x00000008
#define RES_PRF_QUES 0x00000010
#define RES_PRF_ANS 0x00000020
/* 0x00008000 */
/* Things involving an internal (static) resolver context. */
-#if defined _REENTRANT || defined _LIBC_REENTRANT
+#if !defined _LIBC || defined _LIBC_REENTRANT
extern struct __res_state *__res_state(void) __attribute__ ((__const__));
-# if defined __RES_PTHREAD_INTERNAL
-extern struct __res_state _res;
-# else
-# define _res (*__res_state())
-# endif
+#define _res (*__res_state())
#else
+#ifndef __BIND_NOSTATIC
extern struct __res_state _res;
#endif
+#endif
+#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_init __res_init
#define res_isourserver __res_isourserver
+#define res_mkquery __res_mkquery
+#define res_query __res_query
+#define res_querydomain __res_querydomain
+#define res_search __res_search
#define res_send __res_send
__BEGIN_DECLS
-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;
-void res_close (void) __THROW;
-int res_init (void) __THROW;
-int res_isourserver (const struct sockaddr_in *) __THROW;
-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;
-int res_querydomain (const char *, const char *, int, int,
- u_char *, int) __THROW;
-int res_search (const char *, int, int, u_char *, int) __THROW;
-int res_send (const u_char *, int, u_char *, int) __THROW;
+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
+#endif
-#if !defined(SHARED_LIBBIND) || defined(_LIBC)
+#if !defined(SHARED_LIBBIND) || defined(LIB)
/*
* If libbind is a shared object (well, DLL anyway)
- * these externs break the linker when resolv.h is
+ * 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
*
#define b64_pton __b64_pton
#define dn_comp __dn_comp
#define dn_count_labels __dn_count_labels
+#define dn_expand __dn_expand
#define dn_skipname __dn_skipname
#define fp_resstat __fp_resstat
#define loc_aton __loc_aton
#define putlong __putlong
#define putshort __putshort
#define res_dnok __res_dnok
-#define res_findzonecut __res_findzonecut
#define res_hnok __res_hnok
#define res_hostalias __res_hostalias
#define res_mailok __res_mailok
#define sym_ntos __sym_ntos
#define sym_ston __sym_ston
__BEGIN_DECLS
-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;
-int dn_skipname (const u_char *, const u_char *) __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;
-int dn_comp (const char *, u_char *, int,
- u_char **, u_char **) __THROW;
-int dn_expand (const u_char *, const u_char *, const u_char *,
- char *, int) __THROW;
-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;
+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));
/* Things involving a resolver context. */
-int res_ninit (res_state) __THROW;
-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;
-void res_nclose (res_state) __THROW;
+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));
__END_DECLS
#endif /* !_RESOLV_H_ */
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