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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e7bfd0a1 PW |
2 | /* |
3 | * ebt_nflog | |
4 | * | |
5 | * Author: | |
6 | * Peter Warasin <peter@endian.com> | |
7 | * | |
8 | * February, 2008 | |
9 | * | |
10 | * Based on: | |
11 | * xt_NFLOG.c, (C) 2006 by Patrick McHardy <kaber@trash.net> | |
12 | * ebt_ulog.c, (C) 2004 by Bart De Schuymer <bdschuym@pandora.be> | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/spinlock.h> | |
18219d3f | 18 | #include <linux/netfilter/x_tables.h> |
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19 | #include <linux/netfilter_bridge/ebtables.h> |
20 | #include <linux/netfilter_bridge/ebt_nflog.h> | |
21 | #include <net/netfilter/nf_log.h> | |
22 | ||
2d06d4a5 | 23 | static unsigned int |
4b560b44 | 24 | ebt_nflog_tg(struct sk_buff *skb, const struct xt_action_param *par) |
e7bfd0a1 | 25 | { |
7eb35586 | 26 | const struct ebt_nflog_info *info = par->targinfo; |
613dbd95 | 27 | struct net *net = xt_net(par); |
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28 | struct nf_loginfo li; |
29 | ||
30 | li.type = NF_LOG_TYPE_ULOG; | |
31 | li.u.ulog.copy_len = info->len; | |
32 | li.u.ulog.group = info->group; | |
33 | li.u.ulog.qthreshold = info->threshold; | |
91af6ba7 | 34 | li.u.ulog.flags = 0; |
e7bfd0a1 | 35 | |
613dbd95 PNA |
36 | nf_log_packet(net, PF_BRIDGE, xt_hooknum(par), skb, xt_in(par), |
37 | xt_out(par), &li, "%s", info->prefix); | |
0ac6ab1f | 38 | return EBT_CONTINUE; |
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39 | } |
40 | ||
135367b8 | 41 | static int ebt_nflog_tg_check(const struct xt_tgchk_param *par) |
e7bfd0a1 | 42 | { |
af5d6dc2 | 43 | struct ebt_nflog_info *info = par->targinfo; |
e7bfd0a1 | 44 | |
e7bfd0a1 | 45 | if (info->flags & ~EBT_NFLOG_MASK) |
d6b00a53 | 46 | return -EINVAL; |
e7bfd0a1 | 47 | info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0'; |
d6b00a53 | 48 | return 0; |
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49 | } |
50 | ||
043ef46c JE |
51 | static struct xt_target ebt_nflog_tg_reg __read_mostly = { |
52 | .name = "nflog", | |
53 | .revision = 0, | |
54 | .family = NFPROTO_BRIDGE, | |
55 | .target = ebt_nflog_tg, | |
2d06d4a5 | 56 | .checkentry = ebt_nflog_tg_check, |
fc0e3df4 | 57 | .targetsize = sizeof(struct ebt_nflog_info), |
043ef46c | 58 | .me = THIS_MODULE, |
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59 | }; |
60 | ||
61 | static int __init ebt_nflog_init(void) | |
62 | { | |
043ef46c | 63 | return xt_register_target(&ebt_nflog_tg_reg); |
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64 | } |
65 | ||
66 | static void __exit ebt_nflog_fini(void) | |
67 | { | |
043ef46c | 68 | xt_unregister_target(&ebt_nflog_tg_reg); |
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69 | } |
70 | ||
71 | module_init(ebt_nflog_init); | |
72 | module_exit(ebt_nflog_fini); | |
73 | MODULE_LICENSE("GPL"); | |
74 | MODULE_AUTHOR("Peter Warasin <peter@endian.com>"); | |
75 | MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module"); |