[Linuxptp-devel] [PATCHv4 05/10] rtnl: add function rtnl_get_ts_label to get interface ts_label info

[Hangbin L. <liu...@gm...>]

Signed-off-by: Hangbin Liu <liu...@gm...>
---
 rtnl.c | 31 +++++++++++++++++++++++++++++++
 rtnl.h |  8 ++++++++
 2 files changed, 39 insertions(+)

diff --git a/rtnl.c b/rtnl.c
index d841245..2ac0b96 100644
--- a/rtnl.c
+++ b/rtnl.c
@@ -244,3 +244,34 @@ int rtnl_open(void)
 	}
 	return fd;
 }
+
+static void rtnl_get_ts_label_callback(void *ctx, int linkup, int ts_index)
+{
+	int *dst = ctx;
+	*dst = ts_index;
+}
+
+int rtnl_get_ts_label(struct interface *iface)
+{
+	int err, fd;
+	int ts_index = -1;
+
+	fd = rtnl_open();
+	if (fd < 0)
+		return fd;
+
+	err = rtnl_link_query(fd, iface->name);
+	if (err) {
+		goto no_info;
+	}
+
+	rtnl_link_status(fd, iface->name, rtnl_get_ts_label_callback, &ts_index);
+	if (ts_index > 0 && if_indextoname(ts_index, iface->ts_label))
+		err = 0;
+	else
+		err = -1;
+
+no_info:
+	rtnl_close(fd);
+	return err;
+}
diff --git a/rtnl.h b/rtnl.h
index 20f1491..d335c40 100644
--- a/rtnl.h
+++ b/rtnl.h
@@ -20,6 +20,8 @@
 #ifndef HAVE_RTNL_H
 #define HAVE_RTNL_H
 
+#include "config.h"
+
 typedef void (*rtnl_callback)(void *ctx, int linkup, int ts_index);
 
 /**
@@ -53,4 +55,10 @@ int rtnl_link_status(int fd, char *device, rtnl_callback cb, void *ctx);
  */
 int rtnl_open(void);
 
+/**
+ * Get interface ts_label information
+ * @param iface  struct interface.
+ * @return       Zero on success, or -1 on error.
+ */
+int rtnl_get_ts_label(struct interface *iface);
 #endif
-- 
2.5.5