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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 <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 <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "batadv_packet_compat.h"
#include "batman_adv.h"
#include "bat-hosts.h"
#include "debug.h"
#include "functions.h"
#include "main.h"
#include "netlink.h"
static const int mcast_flags_mandatory[] = {
BATADV_ATTR_ORIG_ADDRESS,
};
static int mcast_flags_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;
uint32_t flags;
uint8_t *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_MCAST_FLAGS)
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, mcast_flags_mandatory,
ARRAY_SIZE(mcast_flags_mandatory))) {
fputs("Missing attributes from kernel\n", stderr);
exit(1);
}
addr = nla_data(attrs[BATADV_ATTR_ORIG_ADDRESS]);
if (opts->read_opt & MULTICAST_ONLY && !(addr[0] & 0x01))
return NL_OK;
if (opts->read_opt & UNICAST_ONLY && (addr[0] & 0x01))
return NL_OK;
bat_host = bat_hosts_find_by_mac((char *)addr);
if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
printf("%02x:%02x:%02x:%02x:%02x:%02x ",
addr[0], addr[1], addr[2],
addr[3], addr[4], addr[5]);
else
printf("%17s ", bat_host->name);
if (attrs[BATADV_ATTR_MCAST_FLAGS]) {
flags = nla_get_u32(attrs[BATADV_ATTR_MCAST_FLAGS]);
printf("[%c%c%c%s%s%c]\n",
flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES ? 'U' : '.',
flags & BATADV_MCAST_WANT_ALL_IPV4 ? '4' : '.',
flags & BATADV_MCAST_WANT_ALL_IPV6 ? '6' : '.',
!(flags & BATADV_MCAST_WANT_NO_RTR4) ? "R4" : ". ",
!(flags & BATADV_MCAST_WANT_NO_RTR6) ? "R6" : ". ",
!(flags & BATADV_MCAST_HAVE_MC_PTYPE_CAPA) ? 'P' : '.');
} else {
printf("-\n");
}
return NL_OK;
}
static int netlink_print_mcast_flags(struct state *state, char *orig_iface,
int read_opts, float orig_timeout,
float watch_interval)
{
char *info_header;
char shadowing4;
char shadowing6;
char querier4;
char querier6;
char *header;
bool bridged;
int ret;
/* only parse own multicast flags */
info_header = netlink_get_info(state, BATADV_CMD_GET_MCAST_FLAGS, NULL);
free(info_header);
if (mcast_flags == -EOPNOTSUPP || mcast_flags_priv == -EOPNOTSUPP)
return -EOPNOTSUPP;
bridged = mcast_flags_priv & BATADV_MCAST_FLAGS_BRIDGED;
if (bridged) {
querier4 = (mcast_flags_priv & BATADV_MCAST_FLAGS_QUERIER_IPV4_EXISTS) ? '.' : '4';
querier6 = (mcast_flags_priv & BATADV_MCAST_FLAGS_QUERIER_IPV6_EXISTS) ? '.' : '6';
shadowing4 = (mcast_flags_priv & BATADV_MCAST_FLAGS_QUERIER_IPV4_SHADOWING) ? '4' : '.';
shadowing6 = (mcast_flags_priv & BATADV_MCAST_FLAGS_QUERIER_IPV6_SHADOWING) ? '6' : '.';
} else {
querier4 = '?';
querier6 = '?';
shadowing4 = '?';
shadowing6 = '?';
}
ret = asprintf(&header,
"Multicast flags (own flags: [%c%c%c%s%s%c])\n"
"* Bridged [U]\t\t\t\t%c\n"
"* No IGMP/MLD Querier [4/6]:\t\t%c/%c\n"
"* Shadowing IGMP/MLD Querier [4/6]:\t%c/%c\n"
"-------------------------------------------\n"
" %-10s %s\n",
(mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.',
(mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.',
(mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.',
!(mcast_flags & BATADV_MCAST_WANT_NO_RTR4) ? "R4" : ". ",
!(mcast_flags & BATADV_MCAST_WANT_NO_RTR6) ? "R6" : ". ",
!(mcast_flags & BATADV_MCAST_HAVE_MC_PTYPE_CAPA) ? 'P' : '.',
bridged ? 'U' : '.',
querier4, querier6, shadowing4, shadowing6,
"Originator", "Flags");
if (ret < 0)
return ret;
ret = netlink_print_common(state, orig_iface, read_opts,
orig_timeout, watch_interval, header,
BATADV_CMD_GET_MCAST_FLAGS,
mcast_flags_callback);
free(header);
return ret;
}
static struct debug_table_data batctl_debug_table_mcast_flags = {
.netlink_fn = netlink_print_mcast_flags,
};
COMMAND_NAMED(DEBUGTABLE, mcast_flags, "mf", handle_debug_table,
COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK,
&batctl_debug_table_mcast_flags, "");
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