1 /*
2 * (C) 2016 by Pablo Neira Ayuso <pablo@netfilter.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9 #include <linux/module.h>
10 #include <linux/spinlock.h>
11 #include <linux/skbuff.h>
12 #include <linux/ip.h>
13 #include <net/route.h>
14
15 #include <linux/netfilter.h>
16 #include <net/netfilter/nf_log.h>
17
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)18 static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
19 unsigned int hooknum,
20 const struct sk_buff *skb,
21 const struct net_device *in,
22 const struct net_device *out,
23 const struct nf_loginfo *loginfo,
24 const char *prefix)
25 {
26 nf_log_l2packet(net, pf, skb->protocol, hooknum, skb, in, out,
27 loginfo, prefix);
28 }
29
30 static struct nf_logger nf_netdev_logger __read_mostly = {
31 .name = "nf_log_netdev",
32 .type = NF_LOG_TYPE_LOG,
33 .logfn = nf_log_netdev_packet,
34 .me = THIS_MODULE,
35 };
36
nf_log_netdev_net_init(struct net * net)37 static int __net_init nf_log_netdev_net_init(struct net *net)
38 {
39 return nf_log_set(net, NFPROTO_NETDEV, &nf_netdev_logger);
40 }
41
nf_log_netdev_net_exit(struct net * net)42 static void __net_exit nf_log_netdev_net_exit(struct net *net)
43 {
44 nf_log_unset(net, &nf_netdev_logger);
45 }
46
47 static struct pernet_operations nf_log_netdev_net_ops = {
48 .init = nf_log_netdev_net_init,
49 .exit = nf_log_netdev_net_exit,
50 };
51
nf_log_netdev_init(void)52 static int __init nf_log_netdev_init(void)
53 {
54 int ret;
55
56 /* Request to load the real packet loggers. */
57 nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
58 nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
59 nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
60
61 ret = register_pernet_subsys(&nf_log_netdev_net_ops);
62 if (ret < 0)
63 return ret;
64
65 nf_log_register(NFPROTO_NETDEV, &nf_netdev_logger);
66 return 0;
67 }
68
nf_log_netdev_exit(void)69 static void __exit nf_log_netdev_exit(void)
70 {
71 unregister_pernet_subsys(&nf_log_netdev_net_ops);
72 nf_log_unregister(&nf_netdev_logger);
73 }
74
75 module_init(nf_log_netdev_init);
76 module_exit(nf_log_netdev_exit);
77
78 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
79 MODULE_DESCRIPTION("Netfilter netdev packet logging");
80 MODULE_LICENSE("GPL");
81 MODULE_ALIAS_NF_LOGGER(5, 0); /* NFPROTO_NETDEV */
82
