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From 808b584d22106828aaaa3f2a52b1d076b6e66040 Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Thu, 11 Sep 2014 08:09:34 +0000
Subject: [PATCH] provide dn_skipname
Modified for Gentoo to include dn_expand fix
keep dn_expand available, for musl and glibc-2.34
---
configure.ac | 2 +-
src/libreplace/__dn_skipname.c | 87 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 88 insertions(+), 1 deletion(-)
create mode 100644 src/libreplace/__dn_skipname.c
diff --git a/configure.ac b/configure.ac
index 63e398c..739da3b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -269,6 +269,7 @@
#endif
]])
+AC_CHECK_FUNCS([dn_expand])
AC_CHECK_FUNCS([ftruncate gethostname memmove memset socket])
AC_CHECK_FUNCS([strchr strcspn strdup strerror])
AC_CHECK_FUNCS([strcasecmp strncasecmp strspn strtoul])
@@ -274,7 +274,7 @@
AC_CHECK_FUNCS([gethostbyname inet_ntoa select strrchr strstr strtol])
AC_REPLACE_FUNCS([getopt_long_only strncasecmp])
-AC_REPLACE_FUNCS([__ns_initparse __ns_name_uncompress __ns_msg_getflag])
+AC_REPLACE_FUNCS([__ns_initparse __ns_name_uncompress __ns_msg_getflag __dn_skipname])
dnl Magnus Holmgren says this avoids linking a private function
AC_LIBOBJ([__ns_get16])
diff --git a/src/libreplace/__dn_skipname.c b/src/libreplace/__dn_skipname.c
new file mode 100644
index 0000000..88d48b5
--- /dev/null
+++ b/src/libreplace/__dn_skipname.c
@@ -0,0 +1,87 @@
+/* taken from OpenBSD source */
+/*
+ * ++Copyright++ 1985, 1993
+ * -
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * 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--
+ */
+
+/*
+ * Skip over a compressed domain name. Return the size or -1.
+ */
+#include <sys/types.h>
+#include <resolv.h>
+
+int
+__dn_skipname(const u_char *comp_dn, const u_char *eom)
+{
+ const u_char *cp;
+ int n;
+
+ cp = comp_dn;
+ while (cp < eom && (n = *cp++)) {
+ /*
+ * check for indirection
+ */
+ switch (n & INDIR_MASK) {
+ case 0: /* normal case, n == len */
+ cp += n;
+ continue;
+ case INDIR_MASK: /* indirection */
+ cp++;
+ break;
+ default: /* illegal type */
+ return (-1);
+ }
+ break;
+ }
+ if (cp > eom)
+ return (-1);
+ return (cp - comp_dn);
+}
+
+
--
2.1.0
--- a/src/libreplace/arpa_nameser.h
+++ b/src/libreplace/arpa_nameser.h
@@ -59,7 +59,7 @@
# define __P(x) x
#endif
-#if defined( HAVE_ARPA_NAMESER_H ) && defined( HAVE_NS_TYPE )
+#if !defined(HAVE_DN_EXPAND) && defined( HAVE_ARPA_NAMESER_H ) && defined( HAVE_NS_TYPE )
#define dn_expand __dn_expand
int dn_expand __P((const u_char *, const u_char *, const u_char *,
char *, int));
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