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1 | /* iplink_ipvlan.c IPVLAN device support |
2 | * | |
3 | * This program is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU General Public License | |
5 | * as published by the Free Software Foundation; either version | |
6 | * 2 of the License, or (at your option) any later version. | |
7 | * | |
8 | * Authors: Mahesh Bandewar <maheshb@google.com> | |
9 | */ | |
10 | ||
11 | #include <stdio.h> | |
12 | #include <stdlib.h> | |
13 | #include <string.h> | |
14 | #include <sys/socket.h> | |
15 | #include <linux/if_link.h> | |
16 | ||
17 | #include "rt_names.h" | |
18 | #include "utils.h" | |
19 | #include "ip_common.h" | |
20 | ||
21 | static void ipvlan_explain(FILE *f) | |
22 | { | |
23 | fprintf(f, "Usage: ... ipvlan [ mode { l2 | l3 } ]\n"); | |
24 | } | |
25 | ||
26 | static void explain(void) | |
27 | { | |
28 | ipvlan_explain(stderr); | |
29 | } | |
30 | ||
31 | static int mode_arg(void) | |
32 | { | |
33 | fprintf(stderr, "Error: argument of \"mode\" must be either \"l2\", " | |
34 | "or \"l3\"\n"); | |
35 | return -1; | |
36 | } | |
37 | ||
38 | static int ipvlan_parse_opt(struct link_util *lu, int argc, char **argv, | |
39 | struct nlmsghdr *n) | |
40 | { | |
41 | while (argc > 0) { | |
42 | if (matches(*argv, "mode") == 0) { | |
43 | __u16 mode = 0; | |
44 | NEXT_ARG(); | |
45 | ||
46 | if (strcmp(*argv, "l2") == 0) | |
47 | mode = IPVLAN_MODE_L2; | |
48 | else if (strcmp(*argv, "l3") == 0) | |
49 | mode = IPVLAN_MODE_L3; | |
50 | else | |
51 | return mode_arg(); | |
52 | ||
53 | addattr16(n, 1024, IFLA_IPVLAN_MODE, mode); | |
54 | } else if (matches(*argv, "help") == 0) { | |
55 | explain(); | |
56 | return -1; | |
57 | } else { | |
58 | fprintf(stderr, "ipvlan: unknown option \"%s\"?\n", | |
59 | *argv); | |
60 | explain(); | |
61 | return -1; | |
62 | } | |
63 | argc--, argv++; | |
64 | } | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static void ipvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
70 | { | |
71 | ||
72 | if (!tb) | |
73 | return; | |
74 | ||
75 | if (tb[IFLA_IPVLAN_MODE]) { | |
76 | if (RTA_PAYLOAD(tb[IFLA_IPVLAN_MODE]) == sizeof(__u16)) { | |
77 | __u16 mode = rta_getattr_u16(tb[IFLA_IPVLAN_MODE]); | |
78 | ||
79 | fprintf(f, " mode %s ", | |
80 | mode == IPVLAN_MODE_L2 ? "l2" : | |
81 | mode == IPVLAN_MODE_L3 ? "l3" : "unknown"); | |
82 | } | |
83 | } | |
84 | } | |
85 | ||
86 | static void ipvlan_print_help(struct link_util *lu, int argc, char **argv, | |
87 | FILE *f) | |
88 | { | |
89 | ipvlan_explain(f); | |
90 | } | |
91 | ||
92 | struct link_util ipvlan_link_util = { | |
93 | .id = "ipvlan", | |
94 | .maxattr = IFLA_IPVLAN_MAX, | |
95 | .parse_opt = ipvlan_parse_opt, | |
96 | .print_opt = ipvlan_print_opt, | |
97 | .print_help = ipvlan_print_help, | |
98 | }; |