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
explain(void)23 static void explain(void)
24 {
25 fprintf(stderr,
26 "Usage: ... macvlan mode { private | vepa | bridge }\n"
27 );
28 }
29
mode_arg(void)30 static 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
macvlan_parse_opt(struct link_util * lu,int argc,char ** argv,struct nlmsghdr * n)37 static 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
macvlan_print_opt(struct link_util * lu,FILE * f,struct rtattr * tb[])69 static 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
88 struct 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