From 1ef0db4b33cc63985713515ac35598c2884900bf Mon Sep 17 00:00:00 2001
From: david <david@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Sat, 3 Sep 2011 01:51:35 +0000
Subject: [PATCH] Define CMSG_ALIGN, CMSG_SPACE, and CMSG_LEN for old Solaris.

This was reported by Dagobert Michelsen and comes from
http://wiki.opencsw.org/porting-faq#toc10.
---
 libnetutil/netutil.cc | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/libnetutil/netutil.cc b/libnetutil/netutil.cc
index b75c8dfac..5128736ba 100644
--- a/libnetutil/netutil.cc
+++ b/libnetutil/netutil.cc
@@ -111,6 +111,26 @@
 #endif
 #include <net/if_arp.h>
 
+/* Define CMSG_* symbols for Solaris 9 and earlier. See
+   http://wiki.opencsw.org/porting-faq#toc10. */
+#if defined(__sun) || defined(__sun__)
+# ifndef CMSG_ALIGN
+#   ifdef __sun__
+#     define CMSG_ALIGN(len) _CMSG_DATA_ALIGN (len)
+#   else
+      /* aligning to sizeof (long) is assumed to be portable (fd.o#40235) */
+#     define CMSG_ALIGN(len) (((len) + sizeof (long) - 1) & ~(sizeof (long) - 1))
+#   endif
+# endif
+# ifndef CMSG_SPACE
+#   define CMSG_SPACE(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + CMSG_ALIGN (len))
+# endif
+# ifndef CMSG_LEN
+#   define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
+# endif
+#endif /* Solaris */
+
+
 #if HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif