ip/batadv: allow to specify RA when creating link

This patch adds the possibility to specify batadv specific options when
creating a new batman link. The only option available on link creation
is IFLA_BATADV_ALGO_NAME which specifies the routing algorithm.
Note there is no batadv specific attr to be handled on link dump.

Signed-off-by: Nicolas Escande <nico.escande@gmail.com>
Signed-off-by: David Ahern <dsahern@kernel.org>

2 files changed, 65 insertions, 1 deletions

diff --git a/ip/Makefile b/ip/Makefile
index 2a7a51c31..11a361cef 100644
--- a/ip/Makefile
+++ b/ip/Makefile
@@ -12,7 +12,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \
     iplink_geneve.o iplink_vrf.o iproute_lwtunnel.o ipmacsec.o ipila.o \
     ipvrf.o iplink_xstats.o ipseg6.o iplink_netdevsim.o iplink_rmnet.o \
     ipnexthop.o ipmptcp.o iplink_bareudp.o iplink_wwan.o ipioam6.o \
-    iplink_amt.o
+    iplink_amt.o iplink_batadv.o
 
 RTMONOBJ=rtmon.o
 
diff --git a/ip/iplink_batadv.c b/ip/iplink_batadv.c
new file mode 100644
index 000000000..45bd923f7
--- /dev/null
+++ b/ip/iplink_batadv.c
@@ -0,0 +1,64 @@
+/*
+ * iplink_batadv.c	Batman-adv support
+ *
+ * Authors:     Nicolas Escande <nico.escande@gmail.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/batman_adv.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+static void print_explain(FILE *f)
+{
+	fprintf(f,
+		"Usage: ... batadv [ ra ROUTING_ALG ]\n"
+		"\n"
+		"Where: ROUTING_ALG := { BATMAN_IV | BATMAN_V }\n"
+	);
+}
+
+static void explain(void)
+{
+	print_explain(stderr);
+}
+
+static int batadv_parse_opt(struct link_util *lu, int argc, char **argv,
+			    struct nlmsghdr *n)
+{
+	while (argc > 0) {
+		if (matches(*argv, "ra") == 0) {
+			NEXT_ARG();
+			addattrstrz(n, 1024, IFLA_BATADV_ALGO_NAME, *argv);
+		} else if (matches(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr,
+				"batadv: unknown command \"%s\"?\n",
+				*argv);
+			explain();
+			return -1;
+		}
+		argc--, argv++;
+	}
+
+	return 0;
+}
+
+static void batadv_print_help(struct link_util *lu, int argc, char **argv,
+			      FILE *f)
+{
+	print_explain(f);
+}
+
+struct link_util batadv_link_util = {
+	.id		= "batadv",
+	.maxattr	= IFLA_BATADV_MAX,
+	.parse_opt	= batadv_parse_opt,
+	.print_help	= batadv_print_help,
+};