mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 09:59:32 +00:00
![Liping Zhang](/assets/img/avatar_default.png)
In netdev family, we will handle non ethernet packets, so using
eth_hdr(skb)->h_proto is incorrect.
Meanwhile, we can use socket(AF_PACKET...) to sending packets, so
skb->protocol is not always set in bridge family.
Add an extra parameter into nf_log_l2packet to solve this issue.
Fixes: 1fddf4bad0
("netfilter: nf_log: add packet logging for netdev family")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
|
|
* (C) 2016 by Pablo Neira Ayuso <pablo@netfilter.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/ip.h>
|
|
#include <net/route.h>
|
|
|
|
#include <linux/netfilter.h>
|
|
#include <net/netfilter/nf_log.h>
|
|
|
|
static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
|
|
unsigned int hooknum,
|
|
const struct sk_buff *skb,
|
|
const struct net_device *in,
|
|
const struct net_device *out,
|
|
const struct nf_loginfo *loginfo,
|
|
const char *prefix)
|
|
{
|
|
nf_log_l2packet(net, pf, skb->protocol, hooknum, skb, in, out,
|
|
loginfo, prefix);
|
|
}
|
|
|
|
static struct nf_logger nf_netdev_logger __read_mostly = {
|
|
.name = "nf_log_netdev",
|
|
.type = NF_LOG_TYPE_LOG,
|
|
.logfn = nf_log_netdev_packet,
|
|
.me = THIS_MODULE,
|
|
};
|
|
|
|
static int __net_init nf_log_netdev_net_init(struct net *net)
|
|
{
|
|
return nf_log_set(net, NFPROTO_NETDEV, &nf_netdev_logger);
|
|
}
|
|
|
|
static void __net_exit nf_log_netdev_net_exit(struct net *net)
|
|
{
|
|
nf_log_unset(net, &nf_netdev_logger);
|
|
}
|
|
|
|
static struct pernet_operations nf_log_netdev_net_ops = {
|
|
.init = nf_log_netdev_net_init,
|
|
.exit = nf_log_netdev_net_exit,
|
|
};
|
|
|
|
static int __init nf_log_netdev_init(void)
|
|
{
|
|
int ret;
|
|
|
|
/* Request to load the real packet loggers. */
|
|
nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
|
|
nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
|
|
nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
|
|
|
|
ret = register_pernet_subsys(&nf_log_netdev_net_ops);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
nf_log_register(NFPROTO_NETDEV, &nf_netdev_logger);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit nf_log_netdev_exit(void)
|
|
{
|
|
unregister_pernet_subsys(&nf_log_netdev_net_ops);
|
|
nf_log_unregister(&nf_netdev_logger);
|
|
}
|
|
|
|
module_init(nf_log_netdev_init);
|
|
module_exit(nf_log_netdev_exit);
|
|
|
|
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
|
|
MODULE_DESCRIPTION("Netfilter netdev packet logging");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_NF_LOGGER(5, 0); /* NFPROTO_NETDEV */
|