From 1f0f830dce26e31232c9d2abb08ceb743e914251 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Sat, 24 Apr 2010 19:02:22 +0200
Subject: [PATCH] lib/replace: add replacement for IPV6_V6ONLY on linux systems
 with broken headers

This is needed on SLES8. See bug 7196.

metze
(cherry picked from commit e06cf3950252a46486aa046a4552ed6ebff175b3)

Signed-off-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 15b509b4b03a2c19caf4abfe475666f0720b4441)
---
 lib/replace/libreplace_network.m4 | 44 +++++++++++++++++++++++++++++++++++++++
 lib/replace/system/network.h      |  7 +++++++
 2 files changed, 51 insertions(+)

diff --git a/lib/replace/libreplace_network.m4 b/lib/replace/libreplace_network.m4
index b7d15eaddbd..6554a59d386 100644
--- a/lib/replace/libreplace_network.m4
+++ b/lib/replace/libreplace_network.m4
@@ -350,6 +350,50 @@ if test x"$libreplace_cv_HAVE_IFACE_IFREQ" = x"yes"; then
 fi
 fi
 
+dnl Some old Linux systems have broken header files and
+dnl miss the IPV6_V6ONLY define in netinet/in.h,
+dnl but have it in linux/in6.h.
+dnl We can't include both files so we just check if the value
+dnl if defined and do the replacement in system/network.h
+AC_CACHE_CHECK([for IPV6_V6ONLY support],libreplace_cv_HAVE_IPV6_V6ONLY,[
+	AC_TRY_COMPILE([
+#include <stdlib.h> /* for NULL */
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netdb.h>
+#include <netinet/in.h>
+		],
+		[
+#ifndef IPV6_V6ONLY
+#error no IPV6_V6ONLY
+#endif
+		],[
+		libreplace_cv_HAVE_IPV6_V6ONLY=yes
+		],[
+		libreplace_cv_HAVE_IPV6_V6ONLY=no
+		])
+])
+if test x"$libreplace_cv_HAVE_IPV6_V6ONLY" != x"yes"; then
+   dnl test for IPV6_V6ONLY
+   AC_CACHE_CHECK([for IPV6_V6ONLY in linux/in6.h],libreplace_cv_HAVE_LINUX_IPV6_V6ONLY_26,[
+	AC_TRY_COMPILE([
+	#include <linux/in6.h>
+		],
+		[
+	#if (IPV6_V6ONLY != 26)
+	#error no linux IPV6_V6ONLY
+	#endif
+		],[
+		libreplace_cv_HAVE_LINUX_IPV6_V6ONLY_26=yes
+		],[
+		libreplace_cv_HAVE_LINUX_IPV6_V6ONLY_26=no
+		])
+	])
+	if test x"$libreplace_cv_HAVE_LINUX_IPV6_V6ONLY_26" = x"yes"; then
+		AC_DEFINE(HAVE_LINUX_IPV6_V6ONLY_26,1,[Whether the system has IPV6_V6ONLY in linux/in6.h])
+	fi
+fi
+
 dnl test for ipv6
 AC_CACHE_CHECK([for ipv6 support],libreplace_cv_HAVE_IPV6,[
 	AC_TRY_LINK([
diff --git a/lib/replace/system/network.h b/lib/replace/system/network.h
index 1f510350bd9..93d533c9b97 100644
--- a/lib/replace/system/network.h
+++ b/lib/replace/system/network.h
@@ -360,6 +360,13 @@ struct addrinfo {
 #define ifr_netmask ifr_addr
 #endif
 
+/* Some old Linux systems have broken header files */
+#ifdef HAVE_IPV6
+#ifdef HAVE_LINUX_IPV6_V6ONLY_26
+#define IPV6_V6ONLY 26
+#endif /* HAVE_LINUX_IPV6_V6ONLY_26 */
+#endif /* HAVE_IPV6 */
+
 #ifdef SOCKET_WRAPPER
 #ifndef SOCKET_WRAPPER_DISABLE
 #ifndef SOCKET_WRAPPER_NOT_REPLACE
-- 
2.11.4.GIT