[PATCH] mini-os: netfront: Fix netfront init when no netmask or gateway are provided

[Costin Lupu <costin.lupu@xxxxxxxxx>]

Commit 1b8ed31f introduced support for reading netmask and gateway values
from Xenstore. However it did not take care of the initial scenario when
these values are not provided and that is what this patch tries to fix.

Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
---
 netfront.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/netfront.c b/netfront.c
index 205484b..1a30945 100644
--- a/netfront.c
+++ b/netfront.c
@@ -376,9 +376,9 @@ out:
        }
     if (ip)
         *ip = strdup(ldev->ip);
-    if (mask)
+    if (mask && ldev->mask)
         *mask = strdup(ldev->mask);
-    if (gw)
+    if (gw && ldev->gw)
         *gw = strdup(ldev->gw);
 
 err:
-- 
2.20.1