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/*
* net/tipc/diag.c: TIPC socket diag
*
* Copyright (c) 2018, Ericsson AB
* 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 "ASIS"
* 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 "socket.h"
#include <linux/sock_diag.h>
#include <linux/tipc_sockets_diag.h>
static u64 __tipc_diag_gen_cookie(struct sock *sk)
{
u32 res[2];
sock_diag_save_cookie(sk, res);
return *((u64 *)res);
}
static int __tipc_add_sock_diag(struct sk_buff *skb,
struct netlink_callback *cb,
struct tipc_sock *tsk)
{
struct tipc_sock_diag_req *req = nlmsg_data(cb->nlh);
struct nlmsghdr *nlh;
int err;
nlh = nlmsg_put_answer(skb, cb, SOCK_DIAG_BY_FAMILY, 0,
NLM_F_MULTI);
if (!nlh)
return -EMSGSIZE;
err = tipc_sk_fill_sock_diag(skb, cb, tsk, req->tidiag_states,
__tipc_diag_gen_cookie);
if (err)
return err;
nlmsg_end(skb, nlh);
return 0;
}
static int tipc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
return tipc_nl_sk_walk(skb, cb, __tipc_add_sock_diag);
}
static int tipc_sock_diag_handler_dump(struct sk_buff *skb,
struct nlmsghdr *h)
{
int hdrlen = sizeof(struct tipc_sock_diag_req);
struct net *net = sock_net(skb->sk);
if (nlmsg_len(h) < hdrlen)
return -EINVAL;
if (h->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.start = tipc_dump_start,
.dump = tipc_diag_dump,
.done = tipc_dump_done,
};
netlink_dump_start(net->diag_nlsk, skb, h, &c);
return 0;
}
return -EOPNOTSUPP;
}
static const struct sock_diag_handler tipc_sock_diag_handler = {
.owner = THIS_MODULE,
.family = AF_TIPC,
.dump = tipc_sock_diag_handler_dump,
};
static int __init tipc_diag_init(void)
{
return sock_diag_register(&tipc_sock_diag_handler);
}
static void __exit tipc_diag_exit(void)
{
sock_diag_unregister(&tipc_sock_diag_handler);
}
module_init(tipc_diag_init);
module_exit(tipc_diag_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("TIPC socket monitoring via SOCK_DIAG");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, AF_TIPC);
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