From: Roy Marples <roy@marples.name>
Date: Mon, 5 Sep 2016 19:43:14 +0000 (+0000)
Subject: Only callback when there is a callback.
X-Git-Tag: v6.11.4~49
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=59d050bda81bb042a5044b6f64abb4391b686c4c;p=thirdparty%2Fdhcpcd.git

Only callback when there is a callback.
---

diff --git a/if-linux.c b/if-linux.c
index 88a38981..11a8c5fb 100644
--- a/if-linux.c
+++ b/if-linux.c
@@ -363,7 +363,7 @@ get_netlink(struct dhcpcd_ctx *ctx, struct interface *ifp, int fd, int flags,
 		}
 		if (nlm->nlmsg_type == NLMSG_DONE)
 			break;
-		if ((r = callback(ctx, ifp, nlm)) != 0)
+		if (callback && (r = callback(ctx, ifp, nlm)) != 0)
 			break;
 	}