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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* iplink_hsr.c HSR device support
*
* Authors: Arvid Brodin <arvid.brodin@alten.se>
*
* Based on iplink_vlan.c by Patrick McHardy <kaber@trash.net>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h> /* Needed by linux/if.h for some reason */
#include <linux/if.h>
#include <linux/if_arp.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
static void print_usage(FILE *f)
{
fprintf(f,
"Usage:\tip link add name NAME type hsr slave1 SLAVE1-IF slave2 SLAVE2-IF\n"
"\t[ supervision ADDR-BYTE ] [version VERSION] [proto PROTOCOL]\n"
"\n"
"NAME\n"
" name of new hsr device (e.g. hsr0)\n"
"SLAVE1-IF, SLAVE2-IF\n"
" the two slave devices bound to the HSR device\n"
"ADDR-BYTE\n"
" 0-255; the last byte of the multicast address used for HSR supervision\n"
" frames (default = 0)\n"
"VERSION\n"
" 0,1; the protocol version to be used. (default = 0)\n"
"PROTOCOL\n"
" 0 - HSR, 1 - PRP. (default = 0 - HSR)\n");
}
static void usage(void)
{
print_usage(stderr);
}
static int hsr_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
int ifindex;
unsigned char multicast_spec;
unsigned char protocol_version;
unsigned char protocol = HSR_PROTOCOL_HSR;
while (argc > 0) {
if (matches(*argv, "supervision") == 0) {
NEXT_ARG();
if (get_u8(&multicast_spec, *argv, 0))
invarg("ADDR-BYTE is invalid", *argv);
addattr_l(n, 1024, IFLA_HSR_MULTICAST_SPEC,
&multicast_spec, 1);
} else if (matches(*argv, "version") == 0) {
NEXT_ARG();
if (!(get_u8(&protocol_version, *argv, 0) == 0 ||
get_u8(&protocol_version, *argv, 0) == 1))
invarg("version is invalid", *argv);
addattr_l(n, 1024, IFLA_HSR_VERSION,
&protocol_version, 1);
} else if (matches(*argv, "proto") == 0) {
NEXT_ARG();
if (!(get_u8(&protocol, *argv, 0) == HSR_PROTOCOL_HSR ||
get_u8(&protocol, *argv, 0) == HSR_PROTOCOL_PRP))
invarg("protocol is invalid", *argv);
addattr_l(n, 1024, IFLA_HSR_PROTOCOL,
&protocol, 1);
} else if (matches(*argv, "slave1") == 0) {
NEXT_ARG();
ifindex = ll_name_to_index(*argv);
if (ifindex == 0)
invarg("No such interface", *argv);
addattr_l(n, 1024, IFLA_HSR_SLAVE1, &ifindex, 4);
} else if (matches(*argv, "slave2") == 0) {
NEXT_ARG();
ifindex = ll_name_to_index(*argv);
if (ifindex == 0)
invarg("No such interface", *argv);
addattr_l(n, 1024, IFLA_HSR_SLAVE2, &ifindex, 4);
} else if (matches(*argv, "help") == 0) {
usage();
return -1;
} else {
fprintf(stderr, "hsr: what is \"%s\"?\n", *argv);
usage();
return -1;
}
argc--, argv++;
}
return 0;
}
static void hsr_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
SPRINT_BUF(b1);
if (!tb)
return;
if (tb[IFLA_HSR_SLAVE1] &&
RTA_PAYLOAD(tb[IFLA_HSR_SLAVE1]) < sizeof(__u32))
return;
if (tb[IFLA_HSR_SLAVE2] &&
RTA_PAYLOAD(tb[IFLA_HSR_SLAVE2]) < sizeof(__u32))
return;
if (tb[IFLA_HSR_SEQ_NR] &&
RTA_PAYLOAD(tb[IFLA_HSR_SEQ_NR]) < sizeof(__u16))
return;
if (tb[IFLA_HSR_SUPERVISION_ADDR] &&
RTA_PAYLOAD(tb[IFLA_HSR_SUPERVISION_ADDR]) < ETH_ALEN)
return;
if (tb[IFLA_HSR_SLAVE1])
print_string(PRINT_ANY,
"slave1",
"slave1 %s ",
ll_index_to_name(rta_getattr_u32(tb[IFLA_HSR_SLAVE1])));
else
print_null(PRINT_ANY, "slave1", "slave1 %s ", "<none>");
if (tb[IFLA_HSR_SLAVE2])
print_string(PRINT_ANY,
"slave2",
"slave2 %s ",
ll_index_to_name(rta_getattr_u32(tb[IFLA_HSR_SLAVE2])));
else
print_null(PRINT_ANY, "slave2", "slave2 %s ", "<none>");
if (tb[IFLA_HSR_SEQ_NR])
print_int(PRINT_ANY,
"seq_nr",
"sequence %d ",
rta_getattr_u16(tb[IFLA_HSR_SEQ_NR]));
if (tb[IFLA_HSR_SUPERVISION_ADDR])
print_string(PRINT_ANY,
"supervision_addr",
"supervision %s ",
ll_addr_n2a(RTA_DATA(tb[IFLA_HSR_SUPERVISION_ADDR]),
RTA_PAYLOAD(tb[IFLA_HSR_SUPERVISION_ADDR]),
ARPHRD_VOID,
b1, sizeof(b1)));
if (tb[IFLA_HSR_PROTOCOL])
print_hhu(PRINT_ANY, "proto", "proto %hhu ",
rta_getattr_u8(tb[IFLA_HSR_PROTOCOL]));
}
static void hsr_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_usage(f);
}
struct link_util hsr_link_util = {
.id = "hsr",
.maxattr = IFLA_HSR_MAX,
.parse_opt = hsr_parse_opt,
.print_opt = hsr_print_opt,
.print_help = hsr_print_help,
};
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