Fix behavior of ipa_opposite().

It was giving wrong results on /30 networks.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/ip.c b/lib/ip.c
index b940bf53..0afe9796 100644
--- a/lib/ip.c
+++ b/lib/ip.c
@@ -153,13 +153,14 @@ int ipa_classify(ip_addr x) { DUMMY }
 /**
  * ipa_opposite - return address of point-to-point neighbor
  * @x: IP address of our end of the link
+ * @pxlen: network prefix length
  *
  * ipa_opposite() returns an address of the opposite end of a numbered
  * point-to-point link.
  *
  * This function is available in IPv4 version only.
  */
-ip_addr ipa_opposite(ip_addr x) { DUMMY }
+ip_addr ipa_opposite(ip_addr x, int pxlen) { DUMMY }
 
 /**
  * ipa_class_mask - guess netmask according to address class