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efe459c7 OH |
1 | /* |
2 | * iplink_vxcan.c vxcan device support (Virtual CAN Tunnel) | |
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 | * Author: Oliver Hartkopp <socketcan@hartkopp.net> | |
10 | * Based on: link_veth.c from Pavel Emelianov <xemul@openvz.org> | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <net/if.h> | |
17 | #include <linux/can/vxcan.h> | |
18 | ||
19 | #include "utils.h" | |
20 | #include "ip_common.h" | |
21 | ||
22 | static void print_usage(FILE *f) | |
23 | { | |
24 | printf("Usage: ip link <options> type vxcan [peer <options>]\n" | |
25 | "To get <options> type 'ip link add help'\n"); | |
26 | } | |
27 | ||
28 | static void usage(void) | |
29 | { | |
30 | print_usage(stderr); | |
31 | } | |
32 | ||
33 | static int vxcan_parse_opt(struct link_util *lu, int argc, char **argv, | |
28254695 | 34 | struct nlmsghdr *n) |
efe459c7 | 35 | { |
efe459c7 | 36 | char *type = NULL; |
dac9ff35 | 37 | int err; |
efe459c7 | 38 | struct rtattr *data; |
efe459c7 | 39 | struct ifinfomsg *ifm, *peer_ifm; |
c58213f6 | 40 | unsigned int ifi_flags, ifi_change, ifi_index; |
efe459c7 OH |
41 | |
42 | if (strcmp(argv[0], "peer") != 0) { | |
43 | usage(); | |
44 | return -1; | |
45 | } | |
46 | ||
28254695 | 47 | ifm = NLMSG_DATA(n); |
efe459c7 OH |
48 | ifi_flags = ifm->ifi_flags; |
49 | ifi_change = ifm->ifi_change; | |
c58213f6 | 50 | ifi_index = ifm->ifi_index; |
efe459c7 OH |
51 | ifm->ifi_flags = 0; |
52 | ifm->ifi_change = 0; | |
c58213f6 | 53 | ifm->ifi_index = 0; |
efe459c7 | 54 | |
c14f9d92 | 55 | data = addattr_nest(n, 1024, VXCAN_INFO_PEER); |
efe459c7 | 56 | |
28254695 | 57 | n->nlmsg_len += sizeof(struct ifinfomsg); |
efe459c7 | 58 | |
c58213f6 | 59 | err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)n, &type); |
efe459c7 OH |
60 | if (err < 0) |
61 | return err; | |
62 | ||
8c0b19d1 SP |
63 | if (type) |
64 | duparg("type", argv[err]); | |
65 | ||
efe459c7 | 66 | peer_ifm = RTA_DATA(data); |
c58213f6 | 67 | peer_ifm->ifi_index = ifm->ifi_index; |
efe459c7 OH |
68 | peer_ifm->ifi_flags = ifm->ifi_flags; |
69 | peer_ifm->ifi_change = ifm->ifi_change; | |
70 | ifm->ifi_flags = ifi_flags; | |
71 | ifm->ifi_change = ifi_change; | |
c58213f6 | 72 | ifm->ifi_index = ifi_index; |
efe459c7 | 73 | |
c14f9d92 | 74 | addattr_nest_end(n, data); |
efe459c7 OH |
75 | return argc - 1 - err; |
76 | } | |
77 | ||
78 | static void vxcan_print_help(struct link_util *lu, int argc, char **argv, | |
79 | FILE *f) | |
80 | { | |
81 | print_usage(f); | |
82 | } | |
83 | ||
84 | struct link_util vxcan_link_util = { | |
85 | .id = "vxcan", | |
86 | .parse_opt = vxcan_parse_opt, | |
87 | .print_help = vxcan_print_help, | |
88 | }; |