nl-link-set.c revision 44d362409d5469aed47d19e7908d19bd194493a4 
1/*
2 * src/nl-link-set.c     Set link attributes
3 *
4 *	This library is free software; you can redistribute it and/or
5 *	modify it under the terms of the GNU Lesser General Public
6 *	License as published by the Free Software Foundation version 2.1
7 *	of the License.
8 *
9 * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
10 */
11
12#include "utils.h"
13
14static void print_usage(void)
15{
16	printf(
17	"Usage: nl-link-set <ifindex> <changes>\n"
18	"  changes := [dev DEV] [mtu MTU] [txqlen TXQLEN] [weight WEIGHT] [link LINK]\n"
19	"             [master MASTER] [qdisc QDISC] [addr ADDR] [broadcast BRD]\n"
20	"             [{ up | down }] [{ arp | noarp }] [{ promisc | nopromisc }]\n"
21	"             [{ dynamic | nodynamic }] [{ multicast | nomulticast }]\n"
22	"             [{ trailers | notrailers }] [{ allmulticast | noallmulticast }]\n");
23	exit(1);
24}
25
26#include "f_link.c"
27
28int main(int argc, char *argv[])
29{
30	struct nl_handle *nlh;
31	struct nl_cache *link_cache;
32	struct rtnl_link *link, *orig;
33	int err = 1, ifindex;
34
35	if (nltool_init(argc, argv) < 0)
36		return -1;
37
38	if (argc < 2 || !strcmp(argv[1], "-h"))
39		print_usage();
40
41	nlh = nltool_alloc_handle();
42	if (!nlh)
43		return -1;
44
45	link = rtnl_link_alloc();
46	if (!link)
47		goto errout;
48
49	if (nltool_connect(nlh, NETLINK_ROUTE) < 0)
50		goto errout_free;
51
52	link_cache = nltool_alloc_link_cache(nlh);
53	if (!link_cache)
54		goto errout_close;
55
56	ifindex = strtoul(argv[1], NULL, 0);
57
58	if (!(orig = rtnl_link_get(link_cache, ifindex))) {
59		fprintf(stderr, "Interface index %d does not exist\n", ifindex);
60		goto errout_cache;
61	}
62
63	get_filter(link, argc, argv, 2, link_cache);
64
65	if (rtnl_link_change(nlh, orig, link, 0) < 0) {
66		fprintf(stderr, "Unable to change link: %s\n", nl_geterror());
67		goto errout_put;
68	}
69
70	err = 0;
71
72errout_put:
73	rtnl_link_put(orig);
74errout_cache:
75	nl_cache_free(link_cache);
76errout_close:
77	nl_close(nlh);
78errout_free:
79	rtnl_link_put(link);
80errout:
81	nl_handle_destroy(nlh);
82	return err;
83}
84