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      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 (at) suug.ch>
     10  */
     11 
     12 #include <netlink/cli/utils.h>
     13 #include <netlink/cli/link.h>
     14 
     15 static struct nl_sock *sock;
     16 static 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 
     26 static 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 
     48 static 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 
     68 int 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