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) 2003-2009 Thomas Graf <tgraf@suug.ch>
10 */
11
12#include <netlink/cli/utils.h>
13#include <netlink/cli/link.h>
14
15static struct nl_sock *sock;
16static int quiet = 0;
17
18#if 0
19	"  changes := [link LINK]\n"
20	"             [master MASTER] [qdisc QDISC] [addr ADDR] [broadcast BRD]\n"
21	"             [{ up | down }] [{ arp | noarp }] [{ promisc | nopromisc }]\n"
22	"             [{ dynamic | nodynamic }] [{ multicast | nomulticast }]\n"
23	"             [{ trailers | notrailers }] [{ allmulticast | noallmulticast }]\n");
24#endif
25
26static void print_usage(void)
27{
28	printf(
29	"Usage: nl-link-set [OPTION]... [LINK]\n"
30	"\n"
31	"Options\n"
32	" -q, --quiet		Do not print informal notifications\n"
33	" -h, --help            Show this help\n"
34	" -v, --version         Show versioning information\n"
35	"\n"
36	"Selecting the Link\n"
37	" -n, --name=NAME	link name\n"
38	" -i, --index           interface index\n"
39	"Change Options\n"
40	"     --rename=NAME     rename interface\n"
41	"     --mtu=NUM         MTU value\n"
42	"     --txqlen=NUM      TX queue length\n"
43	"     --weight=NUM      weight\n"
44	);
45	exit(0);
46}
47
48static void set_cb(struct nl_object *obj, void *arg)
49{
50	struct rtnl_link *link = nl_object_priv(obj);
51	struct rtnl_link *change = arg;
52	struct nl_dump_params params = {
53		.dp_type = NL_DUMP_LINE,
54		.dp_fd = stdout,
55	};
56	int err;
57
58	if ((err = rtnl_link_change(sock, link, change, 0) < 0))
59		nl_cli_fatal(err, "Unable to change link: %s",
60			     nl_geterror(err));
61
62	if (!quiet) {
63		printf("Changed ");
64		nl_object_dump(OBJ_CAST(link), &params);
65	}
66}
67
68int main(int argc, char *argv[])
69{
70	struct nl_cache *link_cache;
71	struct rtnl_link *link, *change;
72	int ok = 0;
73
74	sock = nl_cli_alloc_socket();
75	nl_cli_connect(sock, NETLINK_ROUTE);
76	link_cache = nl_cli_link_alloc_cache(sock);
77	link = nl_cli_link_alloc();
78	change = nl_cli_link_alloc();
79
80	for (;;) {
81		int c, optidx = 0;
82		enum {
83			ARG_RENAME = 257,
84			ARG_MTU = 258,
85			ARG_TXQLEN,
86			ARG_WEIGHT,
87		};
88		static struct option long_opts[] = {
89			{ "quiet", 0, 0, 'q' },
90			{ "help", 0, 0, 'h' },
91			{ "version", 0, 0, 'v' },
92			{ "name", 1, 0, 'n' },
93			{ "index", 1, 0, 'i' },
94			{ "rename", 1, 0, ARG_RENAME },
95			{ "mtu", 1, 0, ARG_MTU },
96			{ "txqlen", 1, 0, ARG_TXQLEN },
97			{ "weight", 1, 0, ARG_WEIGHT },
98			{ 0, 0, 0, 0 }
99		};
100
101		c = getopt_long(argc, argv, "qhvn:i:", long_opts, &optidx);
102		if (c == -1)
103			break;
104
105		switch (c) {
106		case 'q': quiet = 1; break;
107		case 'h': print_usage(); break;
108		case 'v': nl_cli_print_version(); break;
109		case 'n': ok++; nl_cli_link_parse_name(link, optarg); break;
110		case 'i': ok++; nl_cli_link_parse_ifindex(link, optarg); break;
111		case ARG_RENAME: nl_cli_link_parse_name(change, optarg); break;
112		case ARG_MTU: nl_cli_link_parse_mtu(link, optarg); break;
113		case ARG_TXQLEN: nl_cli_link_parse_txqlen(link, optarg); break;
114		case ARG_WEIGHT: nl_cli_link_parse_weight(link, optarg); break;
115		}
116	}
117
118	if (!ok)
119		print_usage();
120
121	nl_cache_foreach_filter(link_cache, OBJ_CAST(link), set_cb, change);
122
123	return 0;
124}
125