cregit-Linux how code gets into the kernel

Release 4.8 net/ipv6/netfilter/ip6t_MASQUERADE.c

/*
 * Copyright (c) 2011 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.
 *
 * Based on Rusty Russell's IPv6 MASQUERADE target. Development of IPv6
 * NAT funded by Astaro.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/ipv6.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat.h>
#include <net/addrconf.h>
#include <net/ipv6.h>
#include <net/netfilter/ipv6/nf_nat_masquerade.h>


static unsigned int masquerade_tg6(struct sk_buff *skb, const struct xt_action_param *par) { return nf_nat_masquerade_ipv6(skb, par->targinfo, par->out); }

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patrick mchardypatrick mchardy2990.62%150.00%
arturo borrero gonzalezarturo borrero gonzalez39.38%150.00%
Total32100.00%2100.00%


static int masquerade_tg6_checkentry(const struct xt_tgchk_param *par) { const struct nf_nat_range *range = par->targinfo; if (range->flags & NF_NAT_RANGE_MAP_IPS) return -EINVAL; return 0; }

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patrick mchardypatrick mchardy37100.00%1100.00%
Total37100.00%1100.00%

static struct xt_target masquerade_tg6_reg __read_mostly = { .name = "MASQUERADE", .family = NFPROTO_IPV6, .checkentry = masquerade_tg6_checkentry, .target = masquerade_tg6, .targetsize = sizeof(struct nf_nat_range), .table = "nat", .hooks = 1 << NF_INET_POST_ROUTING, .me = THIS_MODULE, };
static int __init masquerade_tg6_init(void) { int err; err = xt_register_target(&masquerade_tg6_reg); if (err == 0) nf_nat_masquerade_ipv6_register_notifier(); return err; }

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patrick mchardypatrick mchardy3093.75%150.00%
arturo borrero gonzalezarturo borrero gonzalez26.25%150.00%
Total32100.00%2100.00%


static void __exit masquerade_tg6_exit(void) { nf_nat_masquerade_ipv6_unregister_notifier(); xt_unregister_target(&masquerade_tg6_reg); }

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patrick mchardypatrick mchardy1688.89%150.00%
arturo borrero gonzalezarturo borrero gonzalez211.11%150.00%
Total18100.00%2100.00%

module_init(masquerade_tg6_init); module_exit(masquerade_tg6_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_DESCRIPTION("Xtables: automatic address SNAT");

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patrick mchardypatrick mchardy22295.69%150.00%
arturo borrero gonzalezarturo borrero gonzalez104.31%150.00%
Total232100.00%2100.00%
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