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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>, Andrew Lunn <andrew@lunn.ch>
*
* License-Filename: LICENSES/preferred/GPL-2.0
*/
#include "netlink.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <net/if.h>
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
#include <net/ethernet.h>
#include "batman_adv.h"
#ifndef __unused
#define __unused __attribute__((unused))
#endif
struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
[BATADV_ATTR_VERSION] = { .type = NLA_STRING },
[BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
[BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
[BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING,
.maxlen = IFNAMSIZ },
[BATADV_ATTR_MESH_ADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
[BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING,
.maxlen = IFNAMSIZ },
[BATADV_ATTR_HARD_ADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_ORIG_ADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
[BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
[BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
[BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
[BATADV_ATTR_PAD] = { .type = NLA_UNSPEC },
[BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
[BATADV_ATTR_TT_ADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
[BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
[BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
[BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
[BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
[BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
[BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
[BATADV_ATTR_NEIGH_ADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_TQ] = { .type = NLA_U8 },
[BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
[BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
[BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
[BATADV_ATTR_ROUTER] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
[BATADV_ATTR_BLA_ADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
[BATADV_ATTR_BLA_BACKBONE] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
[BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
[BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .type = NLA_UNSPEC,
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
[BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
[BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
[BATADV_ATTR_VLANID] = { .type = NLA_U16 },
[BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 },
[BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
[BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 },
[BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 },
[BATADV_ATTR_GW_MODE] = { .type = NLA_U8 },
[BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 },
[BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
[BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 },
[BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 },
[BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 },
[BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 },
};
int missing_mandatory_attrs(struct nlattr *attrs[], const int mandatory[],
size_t num)
{
size_t i;
for (i = 0; i < num; i++)
if (!attrs[mandatory[i]])
return -EINVAL;
return 0;
}
static int nlquery_error_cb(struct sockaddr_nl *nla __unused,
struct nlmsgerr *nlerr, void *arg)
{
struct nlquery_opts *query_opts = arg;
query_opts->err = nlerr->error;
return NL_STOP;
}
static int nlquery_stop_cb(struct nl_msg *msg, void *arg)
{
struct nlmsghdr *nlh = nlmsg_hdr(msg);
struct nlquery_opts *query_opts = arg;
int *error = nlmsg_data(nlh);
if (*error)
query_opts->err = *error;
return NL_STOP;
}
int netlink_query_common(const char *mesh_iface, uint8_t nl_cmd,
nl_recvmsg_msg_cb_t callback,
struct nlquery_opts *query_opts)
{
struct nl_sock *sock;
struct nl_msg *msg;
struct nl_cb *cb;
int ifindex;
int family;
int ret;
query_opts->err = 0;
sock = nl_socket_alloc();
if (!sock)
return -ENOMEM;
ret = genl_connect(sock);
if (ret < 0) {
query_opts->err = ret;
goto err_free_sock;
}
family = genl_ctrl_resolve(sock, BATADV_NL_NAME);
if (family < 0) {
query_opts->err = -EOPNOTSUPP;
goto err_free_sock;
}
ifindex = if_nametoindex(mesh_iface);
if (!ifindex) {
query_opts->err = -ENODEV;
goto err_free_sock;
}
cb = nl_cb_alloc(NL_CB_DEFAULT);
if (!cb) {
query_opts->err = -ENOMEM;
goto err_free_sock;
}
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, query_opts);
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, nlquery_stop_cb, query_opts);
nl_cb_err(cb, NL_CB_CUSTOM, nlquery_error_cb, query_opts);
msg = nlmsg_alloc();
if (!msg) {
query_opts->err = -ENOMEM;
goto err_free_cb;
}
genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, NLM_F_DUMP,
nl_cmd, 1);
nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, ifindex);
nl_send_auto_complete(sock, msg);
nlmsg_free(msg);
nl_recvmsgs(sock, cb);
err_free_cb:
nl_cb_put(cb);
err_free_sock:
nl_socket_free(sock);
return query_opts->err;
}
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