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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) B.A.T.M.A.N. contributors:
*
* Andrew Lunn <andrew@lunn.ch>
*
* License-Filename: LICENSES/preferred/GPL-2.0
*/
#include <errno.h>
#include <net/if.h>
#include <netinet/if_ether.h>
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "batman_adv.h"
#include "bat-hosts.h"
#include "debug.h"
#include "functions.h"
#include "main.h"
#include "netlink.h"
static const int neighbors_mandatory[] = {
BATADV_ATTR_NEIGH_ADDRESS,
BATADV_ATTR_HARD_IFINDEX,
BATADV_ATTR_LAST_SEEN_MSECS,
};
static int neighbors_callback(struct nl_msg *msg, void *arg)
{
struct nlattr *attrs[BATADV_ATTR_MAX + 1];
struct nlmsghdr *nlh = nlmsg_hdr(msg);
int last_seen_msecs, last_seen_secs;
struct print_opts *opts = arg;
unsigned int throughput_mbits;
unsigned int throughput_kbits;
char ifname_buf[IF_NAMESIZE];
struct bat_host *bat_host;
struct genlmsghdr *ghdr;
uint32_t ifindex;
uint8_t *neigh;
char *ifname;
if (!genlmsg_valid_hdr(nlh, 0)) {
fputs("Received invalid data from kernel.\n", stderr);
exit(1);
}
ghdr = nlmsg_data(nlh);
if (ghdr->cmd != BATADV_CMD_GET_NEIGHBORS)
return NL_OK;
if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
genlmsg_len(ghdr), batadv_netlink_policy)) {
fputs("Received invalid data from kernel.\n", stderr);
exit(1);
}
if (missing_mandatory_attrs(attrs, neighbors_mandatory,
ARRAY_SIZE(neighbors_mandatory))) {
fputs("Missing attributes from kernel\n", stderr);
exit(1);
}
neigh = nla_data(attrs[BATADV_ATTR_NEIGH_ADDRESS]);
bat_host = bat_hosts_find_by_mac((char *)neigh);
if (attrs[BATADV_ATTR_HARD_IFNAME]) {
ifname = nla_get_string(attrs[BATADV_ATTR_HARD_IFNAME]);
} else {
/* compatibility for Linux < 5.14/batman-adv < 2021.2 */
ifindex = nla_get_u32(attrs[BATADV_ATTR_HARD_IFINDEX]);
if (!if_indextoname(ifindex, ifname_buf))
ifname_buf[0] = '\0';
ifname = ifname_buf;
}
last_seen_msecs = nla_get_u32(attrs[BATADV_ATTR_LAST_SEEN_MSECS]);
last_seen_secs = last_seen_msecs / 1000;
last_seen_msecs = last_seen_msecs % 1000;
if (attrs[BATADV_ATTR_THROUGHPUT]) {
throughput_kbits = nla_get_u32(attrs[BATADV_ATTR_THROUGHPUT]);
throughput_mbits = throughput_kbits / 1000;
throughput_kbits = throughput_kbits % 1000;
if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
printf("%02x:%02x:%02x:%02x:%02x:%02x ",
neigh[0], neigh[1], neigh[2],
neigh[3], neigh[4], neigh[5]);
else
printf("%17s ", bat_host->name);
printf("%4i.%03is (%9u.%1u) [%10s]\n",
last_seen_secs, last_seen_msecs,
throughput_mbits, throughput_kbits / 100,
ifname);
} else {
printf(" %10s ", ifname);
if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
printf("%02x:%02x:%02x:%02x:%02x:%02x ",
neigh[0], neigh[1], neigh[2],
neigh[3], neigh[4], neigh[5]);
else
printf("%17s ", bat_host->name);
printf("%4i.%03is\n", last_seen_secs, last_seen_msecs);
}
return NL_OK;
}
static int netlink_print_neighbors(struct state *state, char *orig_iface,
int read_opts, float orig_timeout,
float watch_interval)
{
char *header = NULL;
char *info_header;
/* only parse routing algorithm name */
last_err = -EINVAL;
info_header = netlink_get_info(state, BATADV_CMD_GET_ORIGINATORS, NULL);
free(info_header);
if (strlen(algo_name_buf) == 0)
return last_err;
if (!strcmp("BATMAN_IV", algo_name_buf))
header = "IF Neighbor last-seen\n";
if (!strcmp("BATMAN_V", algo_name_buf))
header = " Neighbor last-seen speed IF\n";
if (!header)
return -EINVAL;
return netlink_print_common(state, orig_iface, read_opts,
orig_timeout, watch_interval,
header,
BATADV_CMD_GET_NEIGHBORS,
neighbors_callback);
}
static struct debug_table_data batctl_debug_table_neighbors = {
.netlink_fn = netlink_print_neighbors,
};
COMMAND_NAMED(DEBUGTABLE, neighbors, "n", handle_debug_table,
COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK,
&batctl_debug_table_neighbors, "");
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