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From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Sun, 31 Mar 2013 18:27:46 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r248953 - head/sys/netinet
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Author: tuexen
Date: Sun Mar 31 18:27:46 2013
New Revision: 248953
URL: http://svnweb.freebsd.org/changeset/base/248953

Log:
  Add a macro for checking for IPv4 link local addresses.
  
  MFC after: 1 week

Modified:
  head/sys/netinet/sctp_constants.h

Modified: head/sys/netinet/sctp_constants.h
==============================================================================
--- head/sys/netinet/sctp_constants.h	Sun Mar 31 17:50:01 2013	(r248952)
+++ head/sys/netinet/sctp_constants.h	Sun Mar 31 18:27:46 2013	(r248953)
@@ -997,6 +997,10 @@ __FBSDID("$FreeBSD$");
      (((uint8_t *)&(a)->s_addr)[2] == 0) && \
      (((uint8_t *)&(a)->s_addr)[3] == 1))
 
+#define IN4_ISLINKLOCAL_ADDRESS(a) \
+    ((((uint8_t *)&(a)->s_addr)[0] == 169) && \
+     (((uint8_t *)&(a)->s_addr)[1] == 254))
+
 
 #if defined(_KERNEL)
 #define SCTP_GETTIME_TIMEVAL(x) (getmicrouptime(x))