xutils: break out promisc mode functions

Put them separately for the sake of maintanence.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/promisc.c b/promisc.c
new file mode 100644
index 0000000..721da18
--- /dev/null
+++ b/promisc.c
@@ -0,0 +1,25 @@
+#include <string.h>
+
+#include "promisc.h"
+#include "xutils.h"
+
+short enter_promiscuous_mode(char *ifname)
+{
+	short ifflags;
+
+	if (!strncmp("any", ifname, strlen("any")))
+		return 0;
+
+	ifflags = device_get_flags(ifname);
+	device_set_flags(ifname, ifflags | IFF_PROMISC);
+
+	return ifflags;
+}
+
+void leave_promiscuous_mode(char *ifname, short oldflags)
+{
+	if (!strncmp("any", ifname, strlen("any")))
+		return;
+
+	device_set_flags(ifname, oldflags);
+}