/* * Copyright (c) 2006 Patrick McHardy <kaber@trash.net> * * 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/init.h> #include <linux/skbuff.h> #include <linux/netfilter/x_tables.h> #include <linux/netfilter/xt_NFLOG.h> #include <net/netfilter/nf_log.h> MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ipt_NFLOG"); MODULE_ALIAS("ip6t_NFLOG"); static unsigned int nflog_tg(struct sk_buff *skb, const struct net_device *in, const struct net_device *out, unsigned int hooknum, const struct xt_target *target, const void *targinfo) { const struct xt_nflog_info *info = targinfo; struct nf_loginfo li; li.type = NF_LOG_TYPE_ULOG; li.u.ulog.copy_len = info->len; li.u.ulog.group = info->group; li.u.ulog.qthreshold = info->threshold; nf_log_packet(target->family, hooknum, skb, in, out, &li, "%s", info->prefix); return XT_CONTINUE; } static bool nflog_tg_check(const char *tablename, const void *entry, const struct xt_target *target, void *targetinfo, unsigned int hookmask) { const struct xt_nflog_info *info = targetinfo; if (info->flags & ~XT_NFLOG_MASK) return false; if (info->prefix[sizeof(info->prefix) - 1] != '\0') return false; return true; } static struct xt_target nflog_tg_reg[] __read_mostly = { { .name = "NFLOG", .family = AF_INET, .checkentry = nflog_tg_check, .target = nflog_tg, .targetsize = sizeof(struct xt_nflog_info), .me = THIS_MODULE, }, { .name = "NFLOG", .family = AF_INET6, .checkentry = nflog_tg_check, .target = nflog_tg, .targetsize = sizeof(struct xt_nflog_info), .me = THIS_MODULE, }, }; static int __init nflog_tg_init(void) { return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg)); } static void __exit nflog_tg_exit(void) { xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg)); } module_init(nflog_tg_init); module_exit(nflog_tg_exit);