1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * (C) 2016 by Pablo Neira Ayuso <pablo@netfilter.org>
4 */
5
6 #include <linux/module.h>
7 #include <linux/spinlock.h>
8 #include <linux/skbuff.h>
9 #include <linux/ip.h>
10 #include <net/route.h>
11
12 #include <linux/netfilter.h>
13 #include <net/netfilter/nf_log.h>
14
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)15 static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
16 unsigned int hooknum,
17 const struct sk_buff *skb,
18 const struct net_device *in,
19 const struct net_device *out,
20 const struct nf_loginfo *loginfo,
21 const char *prefix)
22 {
23 nf_log_l2packet(net, pf, skb->protocol, hooknum, skb, in, out,
24 loginfo, prefix);
25 }
26
27 static struct nf_logger nf_netdev_logger __read_mostly = {
28 .name = "nf_log_netdev",
29 .type = NF_LOG_TYPE_LOG,
30 .logfn = nf_log_netdev_packet,
31 .me = THIS_MODULE,
32 };
33
nf_log_netdev_net_init(struct net * net)34 static int __net_init nf_log_netdev_net_init(struct net *net)
35 {
36 return nf_log_set(net, NFPROTO_NETDEV, &nf_netdev_logger);
37 }
38
nf_log_netdev_net_exit(struct net * net)39 static void __net_exit nf_log_netdev_net_exit(struct net *net)
40 {
41 nf_log_unset(net, &nf_netdev_logger);
42 }
43
44 static struct pernet_operations nf_log_netdev_net_ops = {
45 .init = nf_log_netdev_net_init,
46 .exit = nf_log_netdev_net_exit,
47 };
48
nf_log_netdev_init(void)49 static int __init nf_log_netdev_init(void)
50 {
51 int ret;
52
53 /* Request to load the real packet loggers. */
54 nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
55 nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
56 nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
57
58 ret = register_pernet_subsys(&nf_log_netdev_net_ops);
59 if (ret < 0)
60 return ret;
61
62 nf_log_register(NFPROTO_NETDEV, &nf_netdev_logger);
63 return 0;
64 }
65
nf_log_netdev_exit(void)66 static void __exit nf_log_netdev_exit(void)
67 {
68 unregister_pernet_subsys(&nf_log_netdev_net_ops);
69 nf_log_unregister(&nf_netdev_logger);
70 }
71
72 module_init(nf_log_netdev_init);
73 module_exit(nf_log_netdev_exit);
74
75 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
76 MODULE_DESCRIPTION("Netfilter netdev packet logging");
77 MODULE_LICENSE("GPL");
78 MODULE_ALIAS_NF_LOGGER(5, 0); /* NFPROTO_NETDEV */
79