1 files changed, 129 insertions, 0 deletions
diff --git a/ip/iplink_ipvlan.c b/ip/iplink_ipvlan.c
new file mode 100644
index 0000000..f29fa4f
--- /dev/null
+++ b/ip/iplink_ipvlan.c
@@ -0,0 +1,129 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* iplink_ipvlan.c	IPVLAN/IPVTAP device support
+ *
+ * Authors:     Mahesh Bandewar <maheshb@google.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 print_explain(struct link_util *lu, FILE *f)
+{
+	fprintf(f,
+		"Usage: ... %s [ mode MODE ] [ FLAGS ]\n"
+		"\n"
+		"MODE: l3 | l3s | l2\n"
+		"FLAGS: bridge | private | vepa\n"
+		"(first values are the defaults if nothing is specified).\n",
+		lu->id);
+}
+
+static int ipvlan_parse_opt(struct link_util *lu, int argc, char **argv,
+			    struct nlmsghdr *n)
+{
+	__u16 flags = 0;
+	bool mflag_given = false;
+
+	while (argc > 0) {
+		if (matches(*argv, "mode") == 0) {
+			__u16 mode = 0;
+
+			NEXT_ARG();
+
+			if (strcmp(*argv, "l2") == 0)
+				mode = IPVLAN_MODE_L2;
+			else if (strcmp(*argv, "l3") == 0)
+				mode = IPVLAN_MODE_L3;
+			else if (strcmp(*argv, "l3s") == 0)
+				mode = IPVLAN_MODE_L3S;
+			else {
+				fprintf(stderr, "Error: argument of \"mode\" must be either \"l2\", \"l3\" or \"l3s\"\n");
+				return -1;
+			}
+			addattr16(n, 1024, IFLA_IPVLAN_MODE, mode);
+		} else if (matches(*argv, "private") == 0 && !mflag_given) {
+			flags |= IPVLAN_F_PRIVATE;
+			mflag_given = true;
+		} else if (matches(*argv, "vepa") == 0 && !mflag_given) {
+			flags |= IPVLAN_F_VEPA;
+			mflag_given = true;
+		} else if (matches(*argv, "bridge") == 0 && !mflag_given) {
+			mflag_given = true;
+		} else if (matches(*argv, "help") == 0) {
+			print_explain(lu, stderr);
+			return -1;
+		} else {
+			fprintf(stderr, "%s: unknown option \"%s\"?\n",
+				lu->id, *argv);
+			print_explain(lu, stderr);
+			return -1;
+		}
+		argc--;
+		argv++;
+	}
+	addattr16(n, 1024, IFLA_IPVLAN_FLAGS, flags);
+
+	return 0;
+}
+
+static void ipvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+
+	if (!tb)
+		return;
+
+	if (tb[IFLA_IPVLAN_MODE]) {
+		if (RTA_PAYLOAD(tb[IFLA_IPVLAN_MODE]) == sizeof(__u16)) {
+			__u16 mode = rta_getattr_u16(tb[IFLA_IPVLAN_MODE]);
+			const char *mode_str = mode == IPVLAN_MODE_L2 ? "l2" :
+				mode == IPVLAN_MODE_L3 ? "l3" :
+				mode == IPVLAN_MODE_L3S ? "l3s" : "unknown";
+
+			print_string(PRINT_ANY, "mode", " mode %s ", mode_str);
+		}
+	}
+	if (tb[IFLA_IPVLAN_FLAGS]) {
+		if (RTA_PAYLOAD(tb[IFLA_IPVLAN_FLAGS]) == sizeof(__u16)) {
+			__u16 flags = rta_getattr_u16(tb[IFLA_IPVLAN_FLAGS]);
+
+			if (flags & IPVLAN_F_PRIVATE)
+				print_bool(PRINT_ANY, "private", "private ",
+					   true);
+			else if (flags & IPVLAN_F_VEPA)
+				print_bool(PRINT_ANY, "vepa", "vepa ",
+					   true);
+			else
+				print_bool(PRINT_ANY, "bridge", "bridge ",
+					   true);
+		}
+	}
+}
+
+static void ipvlan_print_help(struct link_util *lu, int argc, char **argv,
+			      FILE *f)
+{
+	print_explain(lu, f);
+}
+
+struct link_util ipvlan_link_util = {
+	.id		= "ipvlan",
+	.maxattr	= IFLA_IPVLAN_MAX,
+	.parse_opt	= ipvlan_parse_opt,
+	.print_opt	= ipvlan_print_opt,
+	.print_help	= ipvlan_print_help,
+};
+
+struct link_util ipvtap_link_util = {
+	.id		= "ipvtap",
+	.maxattr	= IFLA_IPVLAN_MAX,
+	.parse_opt	= ipvlan_parse_opt,
+	.print_opt	= ipvlan_print_opt,
+	.print_help	= ipvlan_print_help,
+};