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Commit | Line | Data |
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2da55b1b PE |
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> | |
c595fda5 | 14 | #include <net/if.h> |
118c923c | 15 | #include <linux/veth.h> |
2da55b1b PE |
16 | |
17 | #include "utils.h" | |
18 | #include "ip_common.h" | |
2da55b1b | 19 | |
561e650e | 20 | static void print_usage(FILE *f) |
2da55b1b | 21 | { |
ac3ff720 SH |
22 | printf("Usage: ip link <options> type veth [peer <options>]\n" |
23 | "To get <options> type 'ip link add help'\n"); | |
2da55b1b PE |
24 | } |
25 | ||
561e650e | 26 | static void usage(void) |
27 | { | |
28 | print_usage(stderr); | |
29 | } | |
30 | ||
2da55b1b | 31 | static int veth_parse_opt(struct link_util *lu, int argc, char **argv, |
c595fda5 | 32 | struct nlmsghdr *hdr) |
2da55b1b | 33 | { |
be2c3142 SH |
34 | char *dev = NULL; |
35 | char *name = NULL; | |
36 | char *link = NULL; | |
37 | char *type = NULL; | |
5e25cf77 | 38 | int index = 0; |
f9329cca | 39 | int err, len; |
56f5daac | 40 | struct rtattr *data; |
db02608b | 41 | int group; |
18917544 KK |
42 | struct ifinfomsg *ifm, *peer_ifm; |
43 | unsigned int ifi_flags, ifi_change; | |
2da55b1b | 44 | |
f9329cca VG |
45 | if (strcmp(argv[0], "peer") != 0) { |
46 | usage(); | |
47 | return -1; | |
48 | } | |
2da55b1b | 49 | |
18917544 KK |
50 | ifm = NLMSG_DATA(hdr); |
51 | ifi_flags = ifm->ifi_flags; | |
52 | ifi_change = ifm->ifi_change; | |
53 | ifm->ifi_flags = 0; | |
54 | ifm->ifi_change = 0; | |
55 | ||
f9329cca VG |
56 | data = NLMSG_TAIL(hdr); |
57 | addattr_l(hdr, 1024, VETH_INFO_PEER, NULL, 0); | |
2da55b1b | 58 | |
f9329cca | 59 | hdr->nlmsg_len += sizeof(struct ifinfomsg); |
2da55b1b | 60 | |
f9329cca | 61 | err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)hdr, |
5e25cf77 | 62 | &name, &type, &link, &dev, &group, &index); |
f9329cca VG |
63 | if (err < 0) |
64 | return err; | |
2da55b1b | 65 | |
f9329cca VG |
66 | if (name) { |
67 | len = strlen(name) + 1; | |
68 | if (len > IFNAMSIZ) | |
69 | invarg("\"name\" too long\n", *argv); | |
70 | addattr_l(hdr, 1024, IFLA_IFNAME, name, len); | |
2da55b1b PE |
71 | } |
72 | ||
18917544 KK |
73 | peer_ifm = RTA_DATA(data); |
74 | peer_ifm->ifi_index = index; | |
75 | peer_ifm->ifi_flags = ifm->ifi_flags; | |
76 | peer_ifm->ifi_change = ifm->ifi_change; | |
77 | ifm->ifi_flags = ifi_flags; | |
78 | ifm->ifi_change = ifi_change; | |
5e25cf77 | 79 | |
e0d47aa3 SP |
80 | if (group != -1) |
81 | addattr32(hdr, 1024, IFLA_GROUP, group); | |
82 | ||
f9329cca VG |
83 | data->rta_len = (void *)NLMSG_TAIL(hdr) - (void *)data; |
84 | return argc - 1 - err; | |
2da55b1b PE |
85 | } |
86 | ||
561e650e | 87 | static void veth_print_help(struct link_util *lu, int argc, char **argv, |
88 | FILE *f) | |
89 | { | |
90 | print_usage(f); | |
91 | } | |
92 | ||
2da55b1b PE |
93 | struct link_util veth_link_util = { |
94 | .id = "veth", | |
95 | .parse_opt = veth_parse_opt, | |
561e650e | 96 | .print_help = veth_print_help, |
2da55b1b | 97 | }; |