map: backport fixes from trunk

[openwrt-14.07/.git] / package / network / ipv6 / map / src / mapcalc.c

diff --git a/package/network/ipv6/map/src/mapcalc.c b/package/network/ipv6/map/src/mapcalc.c
index afce6d24d7007059fea8735d81a755fdc2457c82..b4b3d736f006730c2fe56315c0d637e4cc42accf 100644 (file)
--- a/package/network/ipv6/map/src/mapcalc.c
+++ b/package/network/ipv6/map/src/mapcalc.c
@@ -2,7 +2,7 @@
  * mapcalc - MAP parameter calculation
  *
  * Author: Steven Barth <cyrus@openwrt.org>
- * Copyright (c) 2014 cisco Systems, Inc.
+ * Copyright (c) 2014-2015 cisco Systems, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2
@@ -271,8 +271,10 @@ int main(int argc, char *argv[])
                if (ealen < 0 && pdlen >= 0)
                        ealen = pdlen - prefix6len;
 
-               if (psidlen < 0)
+               if (psidlen <= 0) {
                        psidlen = ealen - (32 - prefix4len);
+                       psid = -1;
+               }
 
                if (psid < 0 && psidlen <= 16 && psidlen >= 0 && pdlen >= 0 && ealen >= psidlen) {
                        bmemcpys64(&psid16, &pd, prefix6len + ealen - psidlen, psidlen);