add support for VRF device
Allow user to create a vrf device and specify its table binding.
Based on the iplink_vlan implementation.
Signed-off-by: Shrijeet Mukherjee <shm@cumulusnetworks.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
diff --git a/ip/iplink_vrf.c b/ip/iplink_vrf.c
new file mode 100644
index 0000000..913a289
--- /dev/null
+++ b/ip/iplink_vrf.c
@@ -0,0 +1,86 @@
+/* iplink_vrf.c VRF device support
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Shrijeet Mukherjee <shm@cumulusnetworks.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <linux/if_link.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+static void vrf_explain(FILE *f)
+{
+ fprintf(f, "Usage: ... vrf table TABLEID \n");
+}
+
+static void explain(void)
+{
+ vrf_explain(stderr);
+}
+
+static int table_arg(void)
+{
+ fprintf(stderr,"Error: argument of \"table\" must be 0-32767 and currently unused\n");
+ return -1;
+}
+
+static int vrf_parse_opt(struct link_util *lu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ while (argc > 0) {
+ if (matches(*argv, "table") == 0) {
+ __u32 table;
+
+ NEXT_ARG();
+
+ table = atoi(*argv);
+ if (table > 32767)
+ return table_arg();
+ addattr32(n, 1024, IFLA_VRF_TABLE, table);
+ } else if (matches(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "vrf: unknown option \"%s\"?\n",
+ *argv);
+ explain();
+ return -1;
+ }
+ argc--, argv++;
+ }
+
+ return 0;
+}
+
+static void vrf_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+ if (!tb)
+ return;
+
+ if (tb[IFLA_VRF_TABLE])
+ fprintf(f, "table %u ", rta_getattr_u32(tb[IFLA_VRF_TABLE]));
+}
+
+static void vrf_print_help(struct link_util *lu, int argc, char **argv,
+ FILE *f)
+{
+ vrf_explain(f);
+}
+
+struct link_util vrf_link_util = {
+ .id = "vrf",
+ .maxattr = IFLA_VRF_MAX,
+ .parse_opt = vrf_parse_opt,
+ .print_opt = vrf_print_opt,
+ .print_help = vrf_print_help,
+};