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Commit 52b7c59b authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller
Browse files

udp_diag: Basic skeleton 



Introduce the transport level diag handler module for UDP (and UDP-lite)
sockets and register (empty for now) callbacks in the inet_diag module.

Signed-off-by: default avatarPavel Emelyanov <xemul@parallels.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fce82338

net/ipv4/udp_diag.c

0 → 100644
+95 −0
Original line number Diff line number Diff line 
/*

 * udp_diag.c	Module for monitoring UDP transport protocols sockets.

 *

 * Authors:	Pavel Emelyanov, <xemul@parallels.com>

 *

 *	This program is free software; you can redistribute it and/or

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 */





#include <linux/module.h>

#include <linux/inet_diag.h>

#include <linux/udp.h>

#include <net/udp.h>

#include <net/udplite.h>

#include <linux/inet_diag.h>

#include <linux/sock_diag.h>



static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,

		const struct nlmsghdr *nlh, struct inet_diag_req *req)

{

	return 0;

}



static void udp_dump(struct udp_table *table, struct sk_buff *skb, struct netlink_callback *cb,

		struct inet_diag_req *r, struct nlattr *bc)

{

}



static void udp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,

		struct inet_diag_req *r, struct nlattr *bc)

{

	udp_dump(&udp_table, skb, cb, r, bc);

}



static int udp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,

		struct inet_diag_req *req)

{

	return udp_dump_one(&udp_table, in_skb, nlh, req);

}



static const struct inet_diag_handler udp_diag_handler = {

	.dump		 = udp_diag_dump,

	.dump_one	 = udp_diag_dump_one,

	.idiag_type	 = IPPROTO_UDP,

};



static void udplite_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,

		struct inet_diag_req *r, struct nlattr *bc)

{

	udp_dump(&udplite_table, skb, cb, r, bc);

}



static int udplite_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,

		struct inet_diag_req *req)

{

	return udp_dump_one(&udplite_table, in_skb, nlh, req);

}



static const struct inet_diag_handler udplite_diag_handler = {

	.dump		 = udplite_diag_dump,

	.dump_one	 = udplite_diag_dump_one,

	.idiag_type	 = IPPROTO_UDPLITE,

};



static int __init udp_diag_init(void)

{

	int err;



	err = inet_diag_register(&udp_diag_handler);

	if (err)

		goto out;

	err = inet_diag_register(&udplite_diag_handler);

	if (err)

		goto out_lite;

out:

	return err;

out_lite:

	inet_diag_unregister(&udp_diag_handler);

	goto out;

}



static void __exit udp_diag_exit(void)

{

	inet_diag_unregister(&udplite_diag_handler);

	inet_diag_unregister(&udp_diag_handler);

}



module_init(udp_diag_init);

module_exit(udp_diag_exit);

MODULE_LICENSE("GPL");

MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 17);

MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 136);