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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) B.A.T.M.A.N. contributors:
*
* Marek Lindner <marek.lindner@mailbox.org>
*
* License-Filename: LICENSES/preferred/GPL-2.0
*/
#include <arpa/inet.h>
#include <netinet/if_ether.h>
#include <netinet/in.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 <sys/socket.h>
#include "batman_adv.h"
#include "bat-hosts.h"
#include "debug.h"
#include "functions.h"
#include "main.h"
#include "netlink.h"
static const int dat_cache_mandatory[] = {
BATADV_ATTR_DAT_CACHE_IP4ADDRESS,
BATADV_ATTR_DAT_CACHE_HWADDRESS,
BATADV_ATTR_DAT_CACHE_VID,
BATADV_ATTR_LAST_SEEN_MSECS,
};
static int dat_cache_callback(struct nl_msg *msg, void *arg)
{
int last_seen_msecs, last_seen_secs, last_seen_mins;
struct nlattr *attrs[BATADV_ATTR_MAX + 1];
struct nlmsghdr *nlh = nlmsg_hdr(msg);
struct print_opts *opts = arg;
struct bat_host *bat_host;
struct genlmsghdr *ghdr;
struct in_addr in_addr;
uint8_t *hwaddr;
int16_t vid;
char *addr;
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_DAT_CACHE)
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, dat_cache_mandatory,
ARRAY_SIZE(dat_cache_mandatory))) {
fputs("Missing attributes from kernel\n", stderr);
exit(1);
}
in_addr.s_addr = nla_get_u32(attrs[BATADV_ATTR_DAT_CACHE_IP4ADDRESS]);
addr = inet_ntoa(in_addr);
hwaddr = nla_data(attrs[BATADV_ATTR_DAT_CACHE_HWADDRESS]);
vid = nla_get_u16(attrs[BATADV_ATTR_DAT_CACHE_VID]);
last_seen_msecs = nla_get_u32(attrs[BATADV_ATTR_LAST_SEEN_MSECS]);
last_seen_mins = last_seen_msecs / 60000;
last_seen_msecs = last_seen_msecs % 60000;
last_seen_secs = last_seen_msecs / 1000;
if (opts->read_opt & MULTICAST_ONLY && !(addr[0] & 0x01))
return NL_OK;
if (opts->read_opt & UNICAST_ONLY && (addr[0] & 0x01))
return NL_OK;
printf(" * %15s ", addr);
bat_host = bat_hosts_find_by_mac((char *)hwaddr);
if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
printf("%02x:%02x:%02x:%02x:%02x:%02x ",
hwaddr[0], hwaddr[1], hwaddr[2],
hwaddr[3], hwaddr[4], hwaddr[5]);
else
printf("%17s ", bat_host->name);
printf("%4i %6i:%02i\n",
BATADV_PRINT_VID(vid), last_seen_mins, last_seen_secs);
return NL_OK;
}
static int netlink_print_dat_cache(struct state *state, char *orig_iface,
int read_opts, float orig_timeout,
float watch_interval)
{
char *header;
int ret;
ret = asprintf(&header, "Distributed ARP Table (%s):\n%s\n",
state->mesh_iface,
" IPv4 MAC VID last-seen");
if (ret < 0)
return ret;
ret = netlink_print_common(state, orig_iface, read_opts,
orig_timeout, watch_interval, header,
BATADV_CMD_GET_DAT_CACHE,
dat_cache_callback);
free(header);
return ret;
}
static struct debug_table_data batctl_debug_table_dat_cache = {
.netlink_fn = netlink_print_dat_cache,
};
COMMAND_NAMED(DEBUGTABLE, dat_cache, "dc", handle_debug_table,
COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK,
&batctl_debug_table_dat_cache, "");
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