From ba321706578de8402d50214a9e79a65835cdd821 Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Wed, 28 Apr 2010 00:39:57 +0200
Subject: Better support for /31 networks.

---
 sysdep/bsd/krt-sock.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'sysdep/bsd/krt-sock.c')

diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index 4817df3..12ebe6d 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -546,7 +546,17 @@ krt_read_addr(struct ks_msg *msg)
 #endif
 
   if (iface->flags & IF_MULTIACCESS)
+  {
     ifa.prefix = ipa_and(ifa.ip, ipa_mkmask(masklen));
+
+    if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS - 1)
+      ifa.opposite = ipa_opposite_m1(ifa.ip);
+
+#ifndef IPV6
+    if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS - 2)
+      ifa.opposite = ipa_opposite_m2(ifa.ip);
+#endif
+  }
   else         /* PtP iface */
   {
     ifa.flags |= IA_UNNUMBERED;
-- 
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