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/*
* net/tipc/netlink.c: TIPC configuration handling
*
* Copyright (c) 2005-2006, 2014, Ericsson AB
* Copyright (c) 2005-2007, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "core.h"
#include "config.h"
#include "socket.h"
#include "bearer.h"
#include "link.h"
#include <net/genetlink.h>
static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *rep_buf;
struct nlmsghdr *rep_nlh;
struct nlmsghdr *req_nlh = info->nlhdr;
struct tipc_genlmsghdr *req_userhdr = info->userhdr;
int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
u16 cmd;
if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
cmd = TIPC_CMD_NOT_NET_ADMIN;
else
cmd = req_userhdr->cmd;
rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
hdr_space);
if (rep_buf) {
skb_push(rep_buf, hdr_space);
rep_nlh = nlmsg_hdr(rep_buf);
memcpy(rep_nlh, req_nlh, hdr_space);
rep_nlh->nlmsg_len = rep_buf->len;
genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid);
}
return 0;
}
static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
[TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
[TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
[TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
[TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
[TIPC_NLA_LINK] = { .type = NLA_NESTED, },
};
/* Legacy ASCII API */
static struct genl_family tipc_genl_family = {
.id = GENL_ID_GENERATE,
.name = TIPC_GENL_NAME,
.version = TIPC_GENL_VERSION,
.hdrsize = TIPC_GENL_HDRLEN,
.maxattr = 0,
};
/* Legacy ASCII API */
static struct genl_ops tipc_genl_ops[] = {
{
.cmd = TIPC_GENL_CMD,
.doit = handle_cmd,
},
};
/* Users of the legacy API (tipc-config) can't handle that we add operations,
* so we have a separate genl handling for the new API.
*/
struct genl_family tipc_genl_v2_family = {
.id = GENL_ID_GENERATE,
.name = TIPC_GENL_V2_NAME,
.version = TIPC_GENL_V2_VERSION,
.hdrsize = 0,
.maxattr = TIPC_NLA_MAX,
};
static const struct genl_ops tipc_genl_v2_ops[] = {
{
.cmd = TIPC_NL_BEARER_DISABLE,
.doit = tipc_nl_bearer_disable,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_BEARER_ENABLE,
.doit = tipc_nl_bearer_enable,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_BEARER_GET,
.doit = tipc_nl_bearer_get,
.dumpit = tipc_nl_bearer_dump,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_BEARER_SET,
.doit = tipc_nl_bearer_set,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_SOCK_GET,
.dumpit = tipc_nl_sk_dump,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_PUBL_GET,
.dumpit = tipc_nl_publ_dump,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_LINK_GET,
.doit = tipc_nl_link_get,
.dumpit = tipc_nl_link_dump,
.policy = tipc_nl_policy,
},
{
.cmd = TIPC_NL_LINK_SET,
.doit = tipc_nl_link_set,
.policy = tipc_nl_policy,
}
};
int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
{
u32 maxattr = tipc_genl_v2_family.maxattr;
*attr = tipc_genl_v2_family.attrbuf;
if (!*attr)
return -EOPNOTSUPP;
return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
}
int tipc_netlink_start(void)
{
int res;
res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
if (res) {
pr_err("Failed to register legacy interface\n");
return res;
}
res = genl_register_family_with_ops(&tipc_genl_v2_family,
tipc_genl_v2_ops);
if (res) {
pr_err("Failed to register netlink interface\n");
return res;
}
return 0;
}
void tipc_netlink_stop(void)
{
genl_unregister_family(&tipc_genl_family);
genl_unregister_family(&tipc_genl_v2_family);
}
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