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udp_diag: Basic skeleton

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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: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2011-12-09 06:23:51 +00:00 committed by David S. Miller
parent fce823381e
commit 52b7c59bc3
1 changed files with 95 additions and 0 deletions
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95
net/ipv4/udp_diag.c Normal file
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/*
* 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);