X-Git-Url: http://git.archive.openwrt.org/?a=blobdiff_plain;f=system-linux.c;h=4a3de8c8eeb0714c0ad1f5f3acd20d3cb26adf63;hb=b7e1b35ff18a759a54e4033d04a3550499dd9fc1;hp=3ac55883918c5b97e10f27eb9c5f65dbf1dcc470;hpb=a2f762e2e145b7be932f25c8f1de0da2a8009d4f;p=project%2Fnetifd.git

diff --git a/system-linux.c b/system-linux.c
index 3ac5588..4a3de8c 100644
--- a/system-linux.c
+++ b/system-linux.c
@@ -14,6 +14,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <glob.h>
+#include <time.h>
 
 #include <netlink/msg.h>
 #include <netlink/attr.h>
@@ -607,6 +608,37 @@ int system_if_check(struct device *dev)
 	return 0;
 }
 
+struct device *
+system_if_get_parent(struct device *dev)
+{
+	char buf[64], *devname;
+	int ifindex, iflink, len;
+	FILE *f;
+
+	snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
+	f = fopen(buf, "r");
+	if (!f)
+		return NULL;
+
+	len = fread(buf, 1, sizeof(buf) - 1, f);
+	fclose(f);
+
+	if (len <= 0)
+		return NULL;
+
+	buf[len] = 0;
+	iflink = strtoul(buf, NULL, 0);
+	ifindex = system_if_resolve(dev);
+	if (!iflink || iflink == ifindex)
+		return NULL;
+
+	devname = if_indextoname(iflink, buf);
+	if (!devname)
+		return NULL;
+
+	return device_get(devname, true);
+}
+
 int system_if_dump_stats(struct device *dev, struct blob_buf *b)
 {
 	const char *const counters[] = {