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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) B.A.T.M.A.N. contributors:
*
* Linus Lüssing <linus.luessing@c0d3.blue>
*
* 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "batman_adv.h"
#include "bat-hosts.h"
#include "debug.h"
#include "functions.h"
#include "main.h"
#include "netlink.h"
static const int gateways_mandatory[] = {
BATADV_ATTR_ORIG_ADDRESS,
BATADV_ATTR_ROUTER,
BATADV_ATTR_HARD_IFNAME,
BATADV_ATTR_BANDWIDTH_DOWN,
BATADV_ATTR_BANDWIDTH_UP,
};
static int gateways_callback(struct nl_msg *msg, void *arg)
{
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;
const char *primary_if;
uint32_t bandwidth_down;
uint32_t bandwidth_up;
uint32_t throughput;
uint8_t *router;
uint8_t *orig;
char c = ' ';
uint8_t tq;
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_GATEWAYS)
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, gateways_mandatory,
ARRAY_SIZE(gateways_mandatory))) {
fputs("Missing attributes from kernel\n", stderr);
exit(1);
}
if (attrs[BATADV_ATTR_FLAG_BEST])
c = '*';
orig = nla_data(attrs[BATADV_ATTR_ORIG_ADDRESS]);
router = nla_data(attrs[BATADV_ATTR_ROUTER]);
primary_if = nla_get_string(attrs[BATADV_ATTR_HARD_IFNAME]);
bandwidth_down = nla_get_u32(attrs[BATADV_ATTR_BANDWIDTH_DOWN]);
bandwidth_up = nla_get_u32(attrs[BATADV_ATTR_BANDWIDTH_UP]);
printf("%c ", c);
bat_host = bat_hosts_find_by_mac((char *)orig);
if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
printf("%02x:%02x:%02x:%02x:%02x:%02x ",
orig[0], orig[1], orig[2],
orig[3], orig[4], orig[5]);
else
printf("%17s ", bat_host->name);
if (attrs[BATADV_ATTR_THROUGHPUT]) {
throughput = nla_get_u32(attrs[BATADV_ATTR_THROUGHPUT]);
printf("(%9u.%1u) ", throughput / 10, throughput % 10);
} else if (attrs[BATADV_ATTR_TQ]) {
tq = nla_get_u8(attrs[BATADV_ATTR_TQ]);
printf("(%3i) ", tq);
}
bat_host = bat_hosts_find_by_mac((char *)router);
if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
printf("%02x:%02x:%02x:%02x:%02x:%02x ",
router[0], router[1], router[2],
router[3], router[4], router[5]);
else
printf("%17s ", bat_host->name);
printf("[%10s]: %u.%u/%u.%u MBit\n",
primary_if, bandwidth_down / 10, bandwidth_down % 10,
bandwidth_up / 10, bandwidth_up % 10);
return NL_OK;
}
static int netlink_print_gateways(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 = " Router ( TQ) Next Hop [outgoingIf] Bandwidth\n";
if (!strcmp("BATMAN_V", algo_name_buf))
header = " Router ( throughput) Next Hop [outgoingIf] Bandwidth\n";
if (!header)
return -EINVAL;
return netlink_print_common(state, orig_iface, read_opts,
orig_timeout, watch_interval,
header,
BATADV_CMD_GET_GATEWAYS,
gateways_callback);
}
static struct debug_table_data batctl_debug_table_gateways = {
.netlink_fn = netlink_print_gateways,
};
COMMAND_NAMED(DEBUGTABLE, gateways, "gwl", handle_debug_table,
COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK,
&batctl_debug_table_gateways, "");
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