1/*
2 * iplink_vlan.c	VLAN device support
3 *
4 *              This program is free software; you can redistribute it and/or
5 *              modify it under the terms of the GNU General Public License
6 *              as published by the Free Software Foundation; either version
7 *              2 of the License, or (at your option) any later version.
8 *
9 * Authors:     Patrick McHardy <kaber@trash.net>
10 *		Arnd Bergmann <arnd@arndb.de>
11 */
12
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <sys/socket.h>
17#include <linux/if_link.h>
18
19#include "rt_names.h"
20#include "utils.h"
21#include "ip_common.h"
22
23static void explain(void)
24{
25	fprintf(stderr,
26		"Usage: ... macvlan mode { private | vepa | bridge }\n"
27	);
28}
29
30static int mode_arg(void)
31{
32        fprintf(stderr, "Error: argument of \"mode\" must be \"private\", "
33		"\"vepa\" or \"bridge\"\n");
34        return -1;
35}
36
37static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv,
38			  struct nlmsghdr *n)
39{
40	while (argc > 0) {
41		if (matches(*argv, "mode") == 0) {
42			__u32 mode = 0;
43			NEXT_ARG();
44
45			if (strcmp(*argv, "private") == 0)
46				mode = MACVLAN_MODE_PRIVATE;
47			else if (strcmp(*argv, "vepa") == 0)
48				mode = MACVLAN_MODE_VEPA;
49			else if (strcmp(*argv, "bridge") == 0)
50				mode = MACVLAN_MODE_BRIDGE;
51			else
52				return mode_arg();
53
54			addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
55		} else if (matches(*argv, "help") == 0) {
56			explain();
57			return -1;
58		} else {
59			fprintf(stderr, "macvlan: what is \"%s\"?\n", *argv);
60			explain();
61			return -1;
62		}
63		argc--, argv++;
64	}
65
66	return 0;
67}
68
69static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
70{
71	__u32 mode;
72
73	if (!tb)
74		return;
75
76	if (!tb[IFLA_MACVLAN_MODE] ||
77	    RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32))
78		return;
79
80	mode = *(__u32 *)RTA_DATA(tb[IFLA_VLAN_ID]);
81	fprintf(f, " mode %s ",
82		  mode == MACVLAN_MODE_PRIVATE ? "private"
83		: mode == MACVLAN_MODE_VEPA    ? "vepa"
84		: mode == MACVLAN_MODE_BRIDGE  ? "bridge"
85		:				 "unknown");
86}
87
88struct link_util macvlan_link_util = {
89	.id		= "macvlan",
90	.maxattr	= IFLA_MACVLAN_MAX,
91	.parse_opt	= macvlan_parse_opt,
92	.print_opt	= macvlan_print_opt,
93};
94