[uClibc-cvs] uClibc/libc/inet Makefile, 1.39, 1.40 resolv.c, 1.47, 1.48
Erik Andersen
andersen at uclibc.org
Wed Oct 15 09:04:47 UTC 2003
Update of /var/cvs/uClibc/libc/inet
In directory winder:/tmp/cvs-serv30717/libc/inet
Modified Files:
Makefile resolv.c
Log Message:
Patch from Tony J. White:
I've created a patch for adding dn_expand() to uClibc 0.9.21.
dn_expand() is used by at least ipsec-tools and also openldap I think.
Index: Makefile
===================================================================
RCS file: /var/cvs/uClibc/libc/inet/Makefile,v
retrieving revision 1.39
retrieving revision 1.40
diff -u -d -r1.39 -r1.40
--- Makefile 12 Feb 2003 12:45:11 -0000 1.39
+++ Makefile 15 Oct 2003 09:04:40 -0000 1.40
@@ -42,7 +42,8 @@
closenameservers.o resolvename.o gethostbyname.o res_init.o \
res_query.o gethostbyaddr.o read_etc_hosts_r.o get_hosts_byname_r.o \
get_hosts_byaddr_r.o gethostbyname2.o getnameinfo.o gethostent.o \
- gethostbyname_r.o gethostbyname2_r.o gethostbyaddr_r.o
+ gethostbyname_r.o gethostbyname2_r.o gethostbyaddr_r.o \
+ res_comp.o ns_name.o
MSRC3=socketcalls.c
MOBJ3= accept.o bind.o connect.o getpeername.o getsockname.o getsockopt.o \
Index: resolv.c
===================================================================
RCS file: /var/cvs/uClibc/libc/inet/resolv.c,v
retrieving revision 1.47
retrieving revision 1.48
diff -u -d -r1.47 -r1.48
--- resolv.c 1 Sep 2003 18:03:49 -0000 1.47
+++ resolv.c 15 Oct 2003 09:04:40 -0000 1.48
@@ -7,6 +7,75 @@
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
+*/
+
+/*
+ * Portions 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:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 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
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/*
+ * 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.
+ */
+
+/*
*
* 5-Oct-2000 W. Greathouse wgreathouse at smva.com
* Fix memory leak and memory corruption.
@@ -54,6 +123,10 @@
* Fixed __decode_dotted to count the terminating null character
* in a host name.
*
+ * 02-Oct-2003 Tony J. White <tjw at tjw.org>
+ * Lifted dn_expand() and dependent ns_name_uncompress(), ns_name_unpack(),
+ * and ns_name_ntop() from glibc 2.3.2 for compatibility with ipsec-tools
+ * and openldap.
*
*/
@@ -186,6 +259,13 @@
extern int __length_question(unsigned char * message, int offset);
extern int __open_nameservers(void);
extern void __close_nameservers(void);
+extern int __dn_expand(const u_char *, const u_char *, const u_char *,
+ char *, int);
+extern int __ns_name_uncompress(const u_char *, const u_char *,
+ const u_char *, char *, size_t);
+extern int __ns_name_ntop(const u_char *, char *, size_t);
+extern int __ns_name_unpack(const u_char *, const u_char *, const u_char *,
+ u_char *, size_t);
#ifdef L_encodeh
@@ -1987,3 +2067,234 @@
return NETDB_SUCCESS;
}
#endif
+
+#ifdef L_res_comp
+/*
+ * Expand compressed domain name 'comp_dn' to full domain name.
+ * 'msg' is a pointer to the begining of the message,
+ * 'eomorig' points to the first location after the message,
+ * 'exp_dn' is a pointer to a buffer of size 'length' for the result.
+ * Return size of compressed name or -1 if there was an error.
+ */
+int __dn_expand(const u_char *msg, const u_char *eom, const u_char *src,
+ char *dst, int dstsiz)
+{
+ int n = ns_name_uncompress(msg, eom, src, dst, (size_t)dstsiz);
+
+ if (n > 0 && dst[0] == '.')
+ dst[0] = '\0';
+ return (n);
+}
+#endif /* L_res_comp */
+
+#ifdef L_ns_name
+/*
+ * 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);
+}
+
+/*
+ * special(ch)
+ * Thinking in noninternationalized USASCII (per the DNS spec),
+ * is this characted 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);
+ }
+}
+
+/*
+ * 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 __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 = ns_name_unpack(msg, eom, src, tmp, sizeof tmp)) == -1)
+ return (-1);
+ if (ns_name_ntop(tmp, dst, dstsiz) == -1)
+ return (-1);
+ return (n);
+}
+
+
+/*
+ * 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
+ */
+int __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;
+ const char digits[] = "0123456789";
+
+ cp = src;
+ dn = dst;
+ eom = dst + dstsiz;
+
+ while ((n = *cp++) != 0) {
+ if ((n & NS_CMPRSFLGS) != 0) {
+ /* Some kind of compression pointer. */
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ if (dn != dst) {
+ if (dn >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ *dn++ = '.';
+ }
+ if (dn + n >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ for ((void)NULL; n > 0; n--) {
+ c = *cp++;
+ if (special(c)) {
+ if (dn + 1 >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ *dn++ = '\\';
+ *dn++ = (char)c;
+ } else if (!printable(c)) {
+ if (dn + 3 >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ *dn++ = '\\';
+ *dn++ = digits[c / 100];
+ *dn++ = digits[(c % 100) / 10];
+ *dn++ = digits[c % 10];
+ } else {
+ if (dn >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ *dn++ = (char)c;
+ }
+ }
+ }
+ if (dn == dst) {
+ if (dn >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ *dn++ = '.';
+ }
+ if (dn >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ *dn++ = '\0';
+ return (dn - dst);
+}
+
+/*
+ * 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.
+ */
+int __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) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ /* Fetch next label in domain name. */
+ while ((n = *srcp++) != 0) {
+ /* Check for indirection. */
+ switch (n & NS_CMPRSFLGS) {
+ case 0:
+ /* Limit checks. */
+ if (dstp + n + 1 >= dstlim || srcp + n >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ checked += n + 1;
+ *dstp++ = n;
+ memcpy(dstp, srcp, n);
+ dstp += n;
+ srcp += n;
+ break;
+
+ case NS_CMPRSFLGS:
+ if (srcp >= eom) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ if (len < 0)
+ len = srcp - src + 1;
+ srcp = msg + (((n & 0x3f) << 8) | (*srcp & 0xff));
+ if (srcp < msg || srcp >= eom) { /* Out of range. */
+ __set_errno (EMSGSIZE);
+ 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) {
+ __set_errno (EMSGSIZE);
+ return (-1);
+ }
+ break;
+
+ default:
+ __set_errno (EMSGSIZE);
+ return (-1); /* flag error */
+ }
+ }
+ *dstp = '\0';
+ if (len < 0)
+ len = srcp - src;
+ return (len);
+}
+#endif /* L_ns_name */
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