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1 | /* | |
2 | * link_veth.c veth driver module | |
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: Pavel Emelianov <xemul@openvz.org> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <string.h> | |
14 | #include <net/if.h> | |
15 | #include <linux/veth.h> | |
16 | ||
17 | #include "utils.h" | |
18 | #include "ip_common.h" | |
19 | ||
20 | static void print_usage(FILE *f) | |
21 | { | |
22 | printf("Usage: ip link <options> type veth [peer <options>]\n" | |
23 | "To get <options> type 'ip link add help'\n"); | |
24 | } | |
25 | ||
26 | static void usage(void) | |
27 | { | |
28 | print_usage(stderr); | |
29 | } | |
30 | ||
31 | static int veth_parse_opt(struct link_util *lu, int argc, char **argv, | |
32 | struct nlmsghdr *n) | |
33 | { | |
34 | char *type = NULL; | |
35 | int err; | |
36 | struct rtattr *data; | |
37 | struct ifinfomsg *ifm, *peer_ifm; | |
38 | unsigned int ifi_flags, ifi_change, ifi_index; | |
39 | ||
40 | if (strcmp(argv[0], "peer") != 0) { | |
41 | usage(); | |
42 | return -1; | |
43 | } | |
44 | ||
45 | ifm = NLMSG_DATA(n); | |
46 | ifi_flags = ifm->ifi_flags; | |
47 | ifi_change = ifm->ifi_change; | |
48 | ifi_index = ifm->ifi_index; | |
49 | ifm->ifi_flags = 0; | |
50 | ifm->ifi_change = 0; | |
51 | ifm->ifi_index = 0; | |
52 | ||
53 | data = addattr_nest(n, 1024, VETH_INFO_PEER); | |
54 | ||
55 | n->nlmsg_len += sizeof(struct ifinfomsg); | |
56 | ||
57 | err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)n, &type); | |
58 | if (err < 0) | |
59 | return err; | |
60 | ||
61 | if (type) | |
62 | duparg("type", argv[err]); | |
63 | ||
64 | peer_ifm = RTA_DATA(data); | |
65 | peer_ifm->ifi_index = ifm->ifi_index; | |
66 | peer_ifm->ifi_flags = ifm->ifi_flags; | |
67 | peer_ifm->ifi_change = ifm->ifi_change; | |
68 | ifm->ifi_flags = ifi_flags; | |
69 | ifm->ifi_change = ifi_change; | |
70 | ifm->ifi_index = ifi_index; | |
71 | ||
72 | addattr_nest_end(n, data); | |
73 | return argc - 1 - err; | |
74 | } | |
75 | ||
76 | static void veth_print_help(struct link_util *lu, int argc, char **argv, | |
77 | FILE *f) | |
78 | { | |
79 | print_usage(f); | |
80 | } | |
81 | ||
82 | struct link_util veth_link_util = { | |
83 | .id = "veth", | |
84 | .parse_opt = veth_parse_opt, | |
85 | .print_help = veth_print_help, | |
86 | }; |