[PATCH 08/27] netlink: add basic attribute parser of tcmsg of NETLINK_ROUTE

[JingPiao Chen]

* rtnl_tc.c: Include "nlattr.h" and "xlat/rtnl_tc_attrs.h".
(decode_tcmsg): Call decode_nlattr.
* xlat/rtnl_tc_attrs.in: New file.

Co-authored-by: Fabien Siron <fabien.siron at epita.fr>
---
 rtnl_tc.c             | 14 +++++++++++++-
 xlat/rtnl_tc_attrs.in | 12 ++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 xlat/rtnl_tc_attrs.in

diff --git a/rtnl_tc.c b/rtnl_tc.c
index db06e55..74d9df2 100644
--- a/rtnl_tc.c
+++ b/rtnl_tc.c
@@ -29,15 +29,19 @@
 
 #include "defs.h"
 #include "netlink_route.h"
+#include "nlattr.h"
 #include "print_fields.h"
 
 #include "netlink.h"
 #include <linux/rtnetlink.h>
 
+#include "xlat/rtnl_tc_attrs.h"
+
 DECL_NETLINK_ROUTE_DECODER(decode_tcmsg)
 {
 	struct tcmsg tcmsg = { .tcm_family = family };
-	const size_t offset = sizeof(tcmsg.tcm_family);
+	size_t offset = sizeof(tcmsg.tcm_family);
+	bool decode_nla = false;
 
 	PRINT_FIELD_XVAL("{", tcmsg, tcm_family, addrfams, "AF_???");
 
@@ -50,8 +54,16 @@ DECL_NETLINK_ROUTE_DECODER(decode_tcmsg)
 			PRINT_FIELD_U(", ", tcmsg, tcm_handle);
 			PRINT_FIELD_U(", ", tcmsg, tcm_parent);
 			PRINT_FIELD_U(", ", tcmsg, tcm_info);
+			decode_nla = true;
 		}
 	} else
 		tprints("...");
 	tprints("}");
+
+	offset = NLMSG_ALIGN(sizeof(tcmsg));
+	if (decode_nla && len > offset) {
+		tprints(", ");
+		decode_nlattr(tcp, addr + offset, len - offset,
+			      rtnl_tc_attrs, "TCA_???", NULL, 0, NULL);
+	}
 }
diff --git a/xlat/rtnl_tc_attrs.in b/xlat/rtnl_tc_attrs.in
new file mode 100644
index 0000000..27f39e9
--- /dev/null
+++ b/xlat/rtnl_tc_attrs.in
@@ -0,0 +1,12 @@
+TCA_UNSPEC		0
+TCA_KIND		1
+TCA_OPTIONS		2
+TCA_STATS		3
+TCA_XSTATS		4
+TCA_RATE		5
+TCA_FCNT		6
+TCA_STATS2		7
+TCA_STAB		8
+TCA_PAD			9
+TCA_DUMP_INVISIBLE	10
+TCA_CHAIN		11
-- 
2.7.4