mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-16 22:45:17 +08:00
561e650eff
Allow to print particular link type usage by:
ip link help [TYPE]
Currently to print usage for some link type it is needed
to use the following way:
ip link { add | del | set } type TYPE help
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/*
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* iplink_hsr.c HSR device support
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Arvid Brodin <arvid.brodin@alten.se>
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*
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* Based on iplink_vlan.c by Patrick McHardy <kaber@trash.net>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h> /* Needed by linux/if.h for some reason */
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#include <linux/if.h>
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#include <linux/if_arp.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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static void print_usage(FILE *f)
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{
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fprintf(f,
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"Usage:\tip link add name NAME type hsr slave1 SLAVE1-IF slave2 SLAVE2-IF\n"
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"\t[ supervision ADDR-BYTE ]\n"
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"\n"
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"NAME\n"
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" name of new hsr device (e.g. hsr0)\n"
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"SLAVE1-IF, SLAVE2-IF\n"
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" the two slave devices bound to the HSR device\n"
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"ADDR-BYTE\n"
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" 0-255; the last byte of the multicast address used for HSR supervision\n"
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" frames (default = 0)\n");
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}
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static void usage(void)
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{
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print_usage(stderr);
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}
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static int hsr_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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int ifindex;
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unsigned char multicast_spec;
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while (argc > 0) {
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if (matches(*argv, "supervision") == 0) {
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NEXT_ARG();
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if (get_u8(&multicast_spec, *argv, 0))
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invarg("ADDR-BYTE is invalid", *argv);
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addattr_l(n, 1024, IFLA_HSR_MULTICAST_SPEC,
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&multicast_spec, 1);
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} else if (matches(*argv, "slave1") == 0) {
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NEXT_ARG();
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ifindex = ll_name_to_index(*argv);
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if (ifindex == 0)
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invarg("No such interface", *argv);
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addattr_l(n, 1024, IFLA_HSR_SLAVE1, &ifindex, 4);
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} else if (matches(*argv, "slave2") == 0) {
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NEXT_ARG();
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ifindex = ll_name_to_index(*argv);
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if (ifindex == 0)
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invarg("No such interface", *argv);
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addattr_l(n, 1024, IFLA_HSR_SLAVE2, &ifindex, 4);
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} else if (matches(*argv, "help") == 0) {
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usage();
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return -1;
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} else {
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fprintf(stderr, "hsr: what is \"%s\"?\n", *argv);
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usage();
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return -1;
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}
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argc--, argv++;
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}
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return 0;
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}
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static void hsr_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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SPRINT_BUF(b1);
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if (!tb)
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return;
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if (tb[IFLA_HSR_SLAVE1] &&
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RTA_PAYLOAD(tb[IFLA_HSR_SLAVE1]) < sizeof(__u32))
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return;
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if (tb[IFLA_HSR_SLAVE2] &&
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RTA_PAYLOAD(tb[IFLA_HSR_SLAVE2]) < sizeof(__u32))
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return;
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if (tb[IFLA_HSR_SEQ_NR] &&
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RTA_PAYLOAD(tb[IFLA_HSR_SEQ_NR]) < sizeof(__u16))
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return;
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if (tb[IFLA_HSR_SUPERVISION_ADDR] &&
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RTA_PAYLOAD(tb[IFLA_HSR_SUPERVISION_ADDR]) < ETH_ALEN)
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return;
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fprintf(f, "slave1 ");
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if (tb[IFLA_HSR_SLAVE1])
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fprintf(f, "%s ",
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ll_index_to_name(rta_getattr_u32(tb[IFLA_HSR_SLAVE1])));
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else
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fprintf(f, "<none> ");
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fprintf(f, "slave2 ");
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if (tb[IFLA_HSR_SLAVE2])
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fprintf(f, "%s ",
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ll_index_to_name(rta_getattr_u32(tb[IFLA_HSR_SLAVE2])));
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else
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fprintf(f, "<none> ");
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if (tb[IFLA_HSR_SEQ_NR])
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fprintf(f, "sequence %d ",
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rta_getattr_u16(tb[IFLA_HSR_SEQ_NR]));
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if (tb[IFLA_HSR_SUPERVISION_ADDR])
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fprintf(f, "supervision %s ",
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ll_addr_n2a(RTA_DATA(tb[IFLA_HSR_SUPERVISION_ADDR]),
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RTA_PAYLOAD(tb[IFLA_HSR_SUPERVISION_ADDR]),
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ARPHRD_VOID,
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b1, sizeof(b1)));
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}
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static void hsr_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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print_usage(f);
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}
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struct link_util hsr_link_util = {
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.id = "hsr",
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.maxattr = IFLA_VLAN_MAX,
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.parse_opt = hsr_parse_opt,
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.print_opt = hsr_print_opt,
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.print_help = hsr_print_help,
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};
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