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dnsapi: Get rid of imported domain name parsing code. 

These functions have been exported since glibc 2.9.

Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Hans Leidekker 2021-03-30 10:35:26 +02:00 committed by Alexandre Julliard
parent 0d383fe182
commit 0d26dd2afb
5 changed files with 7 additions and 539 deletions
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2
dlls/dnsapi/Makefile.in
View File

@ -6,8 +6,6 @@ EXTRALIBS = $(RESOLV_LIBS)
C_SRCS = \
main.c \
name.c \
ns_name.c \
ns_parse.c \
query.c \
record.c

7
dlls/dnsapi/dnsapi.h
View File

@ -129,10 +129,3 @@ static inline LPSTR dns_strdup_ua( const char *src )
}
const char *dns_type_to_str( unsigned short ) DECLSPEC_HIDDEN;
#ifdef HAVE_RESOLV
int dns_ns_initparse( const u_char *, int, ns_msg * ) DECLSPEC_HIDDEN;
int dns_ns_parserr( ns_msg *, ns_sect, int, ns_rr * ) DECLSPEC_HIDDEN;
int dns_ns_name_skip( const u_char **, const u_char * ) DECLSPEC_HIDDEN;
int dns_ns_name_uncompress( const u_char *, const u_char *, const u_char *, char *, size_t ) DECLSPEC_HIDDEN;
#endif

313
dlls/dnsapi/ns_name.c
View File

@ -1,313 +0,0 @@
/*
* 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.
*/
#include "config.h"
#ifdef HAVE_RESOLV
#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_NAMESER_H
# include <arpa/nameser.h>
#endif
#include <ctype.h>
#include <errno.h>
#ifdef HAVE_RESOLV_H
# include <resolv.h>
#endif
#include <string.h>
/* Data. */
static const char digits[] = "0123456789";
/* Private. */
/*
* special(ch)
* Thinking in noninternationalized USASCII (per the DNS spec),
* is this character special ("in need of quoting") ?
* return:
* boolean.
*/
static int
special(int ch) {
switch (ch) {
case 0x22: /* '"' */
case 0x2E: /* '.' */
case 0x3B: /* ';' */
case 0x5C: /* '\\' */
/* Special modifiers in zone files. */
case 0x40: /* '@' */
case 0x24: /* '$' */
return (1);
default:
return (0);
}
}
/*
* printable(ch)
* Thinking in noninternationalized USASCII (per the DNS spec),
* is this character visible and not a space when printed ?
* return:
* boolean.
*/
static int
printable(int ch) {
return (ch > 0x20 && ch < 0x7f);
}
/* Public. */
/*
* dns_ns_name_ntop(src, dst, dstsiz)
* Convert an encoded domain name to printable ascii as per RFC1035.
* return:
* Number of bytes written to buffer, or -1 (with errno set)
* notes:
* The root is returned as "."
* All other domains are returned in non absolute form
*/
static int
dns_ns_name_ntop(const u_char *src, char *dst, size_t dstsiz) {
const u_char *cp;
char *dn, *eom;
u_char c;
u_int n;
cp = src;
dn = dst;
eom = dst + dstsiz;
while ((n = *cp++) != 0) {
if ((n & NS_CMPRSFLGS) != 0 && n != 0x41) {
/* Some kind of compression pointer. */
return (-1);
}
if (dn != dst) {
if (dn >= eom) {
return (-1);
}
*dn++ = '.';
}
if (n == 0x41) {
n = *cp++ / 8;
if (dn + n * 2 + 4 >= eom) {
return (-1);
}
*dn++ = '\\';
*dn++ = '[';
*dn++ = 'x';
while (n-- > 0) {
unsigned u;
c = *cp++;
u = c >> 4;
*dn++ = u > 9 ? 'a' + u - 10 : '0' + u;
u = c & 0xf;
*dn++ = u > 9 ? 'a' + u - 10 : '0' + u;
}
*dn++ = ']';
continue;
}
if (dn + n >= eom) {
return (-1);
}
while (n-- > 0) {
c = *cp++;
if (special(c)) {
if (dn + 1 >= eom) {
return (-1);
}
*dn++ = '\\';
*dn++ = (char)c;
} else if (!printable(c)) {
if (dn + 3 >= eom) {
return (-1);
}
*dn++ = '\\';
*dn++ = digits[c / 100];
*dn++ = digits[(c % 100) / 10];
*dn++ = digits[c % 10];
} else {
if (dn >= eom) {
return (-1);
}
*dn++ = (char)c;
}
}
}
if (dn == dst) {
if (dn >= eom) {
return (-1);
}
*dn++ = '.';
}
if (dn >= eom) {
return (-1);
}
*dn++ = '\0';
return (dn - dst);
}
/*
* dns_ns_name_unpack(msg, eom, src, dst, dstsiz)
* Unpack a domain name from a message, source may be compressed.
* return:
* -1 if it fails, or consumed octets if it succeeds.
*/
static int
dns_ns_name_unpack(const u_char *msg, const u_char *eom, const u_char *src,
u_char *dst, size_t dstsiz)
{
const u_char *srcp, *dstlim;
u_char *dstp;
int n, len, checked;
len = -1;
checked = 0;
dstp = dst;
srcp = src;
dstlim = dst + dstsiz;
if (srcp < msg || srcp >= eom) {
return (-1);
}
/* Fetch next label in domain name. */
while ((n = *srcp++) != 0) {
/* Check for indirection. */
switch (n & NS_CMPRSFLGS) {
case 0x40:
if (n == 0x41) {
if (dstp + 1 >= dstlim) {
return (-1);
}
*dstp++ = 0x41;
n = *srcp++ / 8;
++checked;
} else {
return (-1); /* flag error */
}
/* FALLTHROUGH */
case 0:
/* Limit checks. */
if (dstp + n + 1 >= dstlim || srcp + n >= eom) {
return (-1);
}
checked += n + 1;
dstp = memcpy(dstp, srcp - 1, n + 1);
dstp += n + 1;
srcp += n;
break;
case NS_CMPRSFLGS:
if (srcp >= eom) {
return (-1);
}
if (len < 0)
len = srcp - src + 1;
srcp = msg + (((n & 0x3f) << 8) | (*srcp & 0xff));
if (srcp < msg || srcp >= eom) { /* Out of range. */
return (-1);
}
checked += 2;
/*
* Check for loops in the compressed name;
* if we've looked at the whole message,
* there must be a loop.
*/
if (checked >= eom - msg) {
return (-1);
}
break;
default:
return (-1); /* flag error */
}
}
*dstp = '\0';
if (len < 0)
len = srcp - src;
return (len);
}
/*
* dns_ns_name_uncompress(msg, eom, src, dst, dstsiz)
* Expand compressed domain name to presentation format.
* return:
* Number of bytes read out of `src', or -1 (with errno set).
* note:
* Root domain returns as "." not "".
*/
int
dns_ns_name_uncompress(const u_char *msg, const u_char *eom, const u_char *src,
char *dst, size_t dstsiz)
{
u_char tmp[NS_MAXCDNAME];
int n;
if ((n = dns_ns_name_unpack(msg, eom, src, tmp, sizeof tmp)) == -1)
return (-1);
if (dns_ns_name_ntop(tmp, dst, dstsiz) == -1)
return (-1);
return (n);
}
/*
* dns_ns_name_skip(ptrptr, eom)
* Advance *ptrptr to skip over the compressed name it points at.
* return:
* 0 on success, -1 (with errno set) on failure.
*/
int
dns_ns_name_skip(const u_char **ptrptr, const u_char *eom) {
const u_char *cp;
u_int n;
cp = *ptrptr;
while (cp < eom && (n = *cp++) != 0) {
/* Check for indirection. */
switch (n & NS_CMPRSFLGS) {
case 0: /* normal case, n == len */
cp += n;
continue;
case NS_CMPRSFLGS: /* indirection */
cp++;
break;
default: /* illegal type */
return (-1);
}
break;
}
if (cp > eom) {
return (-1);
}
*ptrptr = cp;
return (0);
}
#endif /* HAVE_RESOLV */

210
dlls/dnsapi/ns_parse.c
View File

@ -1,210 +0,0 @@
/*
* 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.
*/
#include "config.h"
#ifdef HAVE_RESOLV
#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_NAMESER_H
# include <arpa/nameser.h>
#endif
#include <errno.h>
#ifdef HAVE_RESOLV_H
# include <resolv.h>
#endif
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "dnsapi.h"
/* Forward. */
static void setsection(ns_msg *msg, ns_sect sect);
/* Macros. */
#define RETERR(err) do { return (-1); } while (0)
#ifdef HAVE_NS_MSG__MSG_PTR
# define NS_PTR(ns_msg) ((ns_msg)->_msg_ptr)
#else
# define NS_PTR(ns_msg) ((ns_msg)->_ptr)
#endif
#define DNS_NS_GET16(s, cp) do { \
register const u_char *t_cp = (cp); \
(s) = ((WORD)t_cp[0] << 8) \
| ((WORD)t_cp[1]) \
; \
(cp) += NS_INT16SZ; \
} while (0)
#define DNS_NS_GET32(l, cp) do { \
register const u_char *t_cp = (cp); \
(l) = ((DWORD)t_cp[0] << 24) \
| ((DWORD)t_cp[1] << 16) \
| ((DWORD)t_cp[2] << 8) \
| ((DWORD)t_cp[3]) \
; \
(cp) += NS_INT32SZ; \
} while (0)
/* Public. */
static int
dns_ns_skiprr(const u_char *ptr, const u_char *eom, ns_sect section, int count) {
const u_char *optr = ptr;
while (count-- > 0) {
int rdlength;
if (dns_ns_name_skip(&ptr, eom) < 0)
RETERR(EMSGSIZE);
ptr += NS_INT16SZ/*Type*/ + NS_INT16SZ/*Class*/;
if (section != ns_s_qd) {
if (ptr + NS_INT32SZ + NS_INT16SZ > eom)
RETERR(EMSGSIZE);
ptr += NS_INT32SZ/*TTL*/;
DNS_NS_GET16(rdlength, ptr);
ptr += rdlength/*RData*/;
}
}
if (ptr > eom)
RETERR(EMSGSIZE);
return (ptr - optr);
}
int
dns_ns_initparse(const u_char *msg, int msglen, ns_msg *handle) {
const u_char *eom = msg + msglen;
int i;
memset(handle, 0x5e, sizeof *handle);
handle->_msg = msg;
handle->_eom = eom;
if (msg + NS_INT16SZ > eom)
RETERR(EMSGSIZE);
DNS_NS_GET16(handle->_id, msg);
if (msg + NS_INT16SZ > eom)
RETERR(EMSGSIZE);
DNS_NS_GET16(handle->_flags, msg);
for (i = 0; i < ns_s_max; i++) {
if (msg + NS_INT16SZ > eom)
RETERR(EMSGSIZE);
DNS_NS_GET16(handle->_counts[i], msg);
}
for (i = 0; i < ns_s_max; i++)
if (handle->_counts[i] == 0)
handle->_sections[i] = NULL;
else {
int b = dns_ns_skiprr(msg, eom, (ns_sect)i,
handle->_counts[i]);
if (b < 0)
return (-1);
handle->_sections[i] = msg;
msg += b;
}
if (msg != eom)
RETERR(EMSGSIZE);
setsection(handle, ns_s_max);
return (0);
}
int
dns_ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) {
int b;
/* Make section right. */
if (section >= ns_s_max)
RETERR(ENODEV);
if (section != handle->_sect)
setsection(handle, section);
/* Make rrnum right. */
if (rrnum == -1)
rrnum = handle->_rrnum;
if (rrnum < 0 || rrnum >= handle->_counts[(int)section])
RETERR(ENODEV);
if (rrnum < handle->_rrnum)
setsection(handle, section);
if (rrnum > handle->_rrnum) {
b = dns_ns_skiprr(NS_PTR(handle), handle->_eom, section,
rrnum - handle->_rrnum);
if (b < 0)
return (-1);
NS_PTR(handle) += b;
handle->_rrnum = rrnum;
}
/* Do the parse. */
b = dn_expand(handle->_msg, handle->_eom,
NS_PTR(handle), rr->name, NS_MAXDNAME);
if (b < 0)
return (-1);
NS_PTR(handle) += b;
if (NS_PTR(handle) + NS_INT16SZ + NS_INT16SZ > handle->_eom)
RETERR(EMSGSIZE);
DNS_NS_GET16(rr->type, NS_PTR(handle));
DNS_NS_GET16(rr->rr_class, NS_PTR(handle));
if (section == ns_s_qd) {
rr->ttl = 0;
rr->rdlength = 0;
rr->rdata = NULL;
} else {
if (NS_PTR(handle) + NS_INT32SZ + NS_INT16SZ > handle->_eom)
RETERR(EMSGSIZE);
DNS_NS_GET32(rr->ttl, NS_PTR(handle));
DNS_NS_GET16(rr->rdlength, NS_PTR(handle));
if (NS_PTR(handle) + rr->rdlength > handle->_eom)
RETERR(EMSGSIZE);
rr->rdata = NS_PTR(handle);
NS_PTR(handle) += rr->rdlength;
}
if (++handle->_rrnum > handle->_counts[(int)section])
setsection(handle, (ns_sect)((int)section + 1));
/* All done. */
return (0);
}
/* Private. */
static void
setsection(ns_msg *msg, ns_sect sect) {
msg->_sect = sect;
if (sect == ns_s_max) {
msg->_rrnum = -1;
NS_PTR(msg) = NULL;
} else {
msg->_rrnum = 0;
NS_PTR(msg) = msg->_sections[(int)sect];
}
}
#endif

14
dlls/dnsapi/query.c
View File

@ -162,7 +162,7 @@ static char *dns_dname_from_msg( ns_msg msg, const unsigned char *pos )
char *str, dname[NS_MAXDNAME] = ".";
/* returns *compressed* length, ignore it */
dns_ns_name_uncompress( ns_msg_base(msg), ns_msg_end(msg), pos, dname, sizeof(dname) );
ns_name_uncompress( ns_msg_base(msg), ns_msg_end(msg), pos, dname, sizeof(dname) );
len = strlen( dname );
str = heap_alloc( len + 1 );
@ -282,7 +282,7 @@ static DNS_STATUS dns_copy_rdata( ns_msg msg, const ns_rr *rr, DNS_RECORDA *r, W
r->Data.MINFO.pNameMailbox = dns_dname_from_msg( msg, pos );
if (!r->Data.MINFO.pNameMailbox) return ERROR_NOT_ENOUGH_MEMORY;
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
if (ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
r->Data.MINFO.pNameErrorsMailbox = dns_dname_from_msg( msg, pos );
@ -343,7 +343,7 @@ static DNS_STATUS dns_copy_rdata( ns_msg msg, const ns_rr *rr, DNS_RECORDA *r, W
r->Data.SIG.pNameSigner = dns_dname_from_msg( msg, pos );
if (!r->Data.SIG.pNameSigner) return ERROR_NOT_ENOUGH_MEMORY;
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
if (ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
/* FIXME: byte order? */
@ -368,7 +368,7 @@ static DNS_STATUS dns_copy_rdata( ns_msg msg, const ns_rr *rr, DNS_RECORDA *r, W
r->Data.SOA.pNamePrimaryServer = dns_dname_from_msg( msg, pos );
if (!r->Data.SOA.pNamePrimaryServer) return ERROR_NOT_ENOUGH_MEMORY;
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
if (ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
r->Data.SOA.pNameAdministrator = dns_dname_from_msg( msg, pos );
@ -378,7 +378,7 @@ static DNS_STATUS dns_copy_rdata( ns_msg msg, const ns_rr *rr, DNS_RECORDA *r, W
return ERROR_NOT_ENOUGH_MEMORY;
}
if (dns_ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
if (ns_name_skip( &pos, ns_msg_end( msg ) ) < 0)
return DNS_ERROR_BAD_PACKET;
r->Data.SOA.dwSerialNo = ntohl( *(const DWORD *)pos ); pos += sizeof(DWORD);
@ -447,7 +447,7 @@ static DNS_STATUS dns_copy_record( ns_msg msg, ns_sect section,
WORD dlen;
ns_rr rr;
if (dns_ns_parserr( &msg, section, num, &rr ) < 0)
if (ns_parserr( &msg, section, num, &rr ) < 0)
return DNS_ERROR_BAD_PACKET;
if (!(record = heap_alloc_zero( dns_get_record_size( &rr ) )))
@ -615,7 +615,7 @@ static DNS_STATUS dns_do_query( PCSTR name, WORD type, DWORD options, PDNS_RECOR
goto exit;
}
if (dns_ns_initparse( answer, len, &msg ) < 0)
if (ns_initparse( answer, len, &msg ) < 0)
{
ret = DNS_ERROR_BAD_PACKET;
goto exit;