86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* Copyright (c) 2006 Patrick McHardy <kaber@trash.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter/xt_NFLOG.h>
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#include <net/netfilter/nf_log.h>
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MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
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MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("ipt_NFLOG");
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MODULE_ALIAS("ip6t_NFLOG");
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static unsigned int
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nflog_tg(struct sk_buff *skb, const struct net_device *in,
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const struct net_device *out, unsigned int hooknum,
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const struct xt_target *target, const void *targinfo)
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{
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const struct xt_nflog_info *info = targinfo;
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struct nf_loginfo li;
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li.type = NF_LOG_TYPE_ULOG;
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li.u.ulog.copy_len = info->len;
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li.u.ulog.group = info->group;
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li.u.ulog.qthreshold = info->threshold;
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nf_log_packet(target->family, hooknum, skb, in, out, &li,
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"%s", info->prefix);
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return XT_CONTINUE;
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}
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static bool
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nflog_tg_check(const char *tablename, const void *entry,
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const struct xt_target *target, void *targetinfo,
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unsigned int hookmask)
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{
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const struct xt_nflog_info *info = targetinfo;
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if (info->flags & ~XT_NFLOG_MASK)
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return false;
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if (info->prefix[sizeof(info->prefix) - 1] != '\0')
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return false;
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return true;
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}
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static struct xt_target nflog_tg_reg[] __read_mostly = {
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{
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.name = "NFLOG",
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.family = AF_INET,
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.checkentry = nflog_tg_check,
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.target = nflog_tg,
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.targetsize = sizeof(struct xt_nflog_info),
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.me = THIS_MODULE,
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},
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{
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.name = "NFLOG",
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.family = AF_INET6,
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.checkentry = nflog_tg_check,
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.target = nflog_tg,
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.targetsize = sizeof(struct xt_nflog_info),
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.me = THIS_MODULE,
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},
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};
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static int __init nflog_tg_init(void)
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{
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return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));
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}
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static void __exit nflog_tg_exit(void)
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{
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xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));
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}
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module_init(nflog_tg_init);
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module_exit(nflog_tg_exit);
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