cregit-Linux how code gets into the kernel

Release 4.11 net/netfilter/nft_reject.c

Directory: net/netfilter
/*
 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
 * Copyright (c) 2013 Eric Leblond <eric@regit.org>
 *
 * 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.
 *
 * Development of this code funded by Astaro AG (http://www.astaro.com/)
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nft_reject.h>
#include <linux/icmp.h>
#include <linux/icmpv6.h>


const struct nla_policy nft_reject_policy[NFTA_REJECT_MAX + 1] = {
	[NFTA_REJECT_TYPE]		= { .type = NLA_U32 },
	[NFTA_REJECT_ICMP_CODE]		= { .type = NLA_U8 },
};

EXPORT_SYMBOL_GPL(nft_reject_policy);


int nft_reject_validate(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nft_data **data) { return nft_chain_validate_hooks(ctx->chain, (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD) | (1 << NF_INET_LOCAL_OUT)); }

Contributors

PersonTokensPropCommitsCommitProp
Liping Zhang50100.00%1100.00%
Total50100.00%1100.00%

EXPORT_SYMBOL_GPL(nft_reject_validate);
int nft_reject_init(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nlattr * const tb[]) { struct nft_reject *priv = nft_expr_priv(expr); int err; err = nft_reject_validate(ctx, expr, NULL); if (err < 0) return err; if (tb[NFTA_REJECT_TYPE] == NULL) return -EINVAL; priv->type = ntohl(nla_get_be32(tb[NFTA_REJECT_TYPE])); switch (priv->type) { case NFT_REJECT_ICMP_UNREACH: if (tb[NFTA_REJECT_ICMP_CODE] == NULL) return -EINVAL; priv->icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]); case NFT_REJECT_TCP_RST: break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy11182.84%150.00%
Liping Zhang2317.16%150.00%
Total134100.00%2100.00%

EXPORT_SYMBOL_GPL(nft_reject_init);
int nft_reject_dump(struct sk_buff *skb, const struct nft_expr *expr) { const struct nft_reject *priv = nft_expr_priv(expr); if (nla_put_be32(skb, NFTA_REJECT_TYPE, htonl(priv->type))) goto nla_put_failure; switch (priv->type) { case NFT_REJECT_ICMP_UNREACH: if (nla_put_u8(skb, NFTA_REJECT_ICMP_CODE, priv->icmp_code)) goto nla_put_failure; break; default: break; } return 0; nla_put_failure: return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy8094.12%133.33%
Eric Leblond33.53%133.33%
David S. Miller22.35%133.33%
Total85100.00%3100.00%

EXPORT_SYMBOL_GPL(nft_reject_dump); static u8 icmp_code_v4[NFT_REJECT_ICMPX_MAX + 1] = { [NFT_REJECT_ICMPX_NO_ROUTE] = ICMP_NET_UNREACH, [NFT_REJECT_ICMPX_PORT_UNREACH] = ICMP_PORT_UNREACH, [NFT_REJECT_ICMPX_HOST_UNREACH] = ICMP_HOST_UNREACH, [NFT_REJECT_ICMPX_ADMIN_PROHIBITED] = ICMP_PKT_FILTERED, };
int nft_reject_icmp_code(u8 code) { BUG_ON(code > NFT_REJECT_ICMPX_MAX); return icmp_code_v4[code]; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso21100.00%2100.00%
Total21100.00%2100.00%

EXPORT_SYMBOL_GPL(nft_reject_icmp_code); static u8 icmp_code_v6[NFT_REJECT_ICMPX_MAX + 1] = { [NFT_REJECT_ICMPX_NO_ROUTE] = ICMPV6_NOROUTE, [NFT_REJECT_ICMPX_PORT_UNREACH] = ICMPV6_PORT_UNREACH, [NFT_REJECT_ICMPX_HOST_UNREACH] = ICMPV6_ADDR_UNREACH, [NFT_REJECT_ICMPX_ADMIN_PROHIBITED] = ICMPV6_ADM_PROHIBITED, };
int nft_reject_icmpv6_code(u8 code) { BUG_ON(code > NFT_REJECT_ICMPX_MAX); return icmp_code_v6[code]; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso21100.00%2100.00%
Total21100.00%2100.00%

EXPORT_SYMBOL_GPL(nft_reject_icmpv6_code); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");

Overall Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy27456.38%228.57%
Pablo Neira Ayuso12826.34%228.57%
Liping Zhang7816.05%114.29%
Eric Leblond40.82%114.29%
David S. Miller20.41%114.29%
Total486100.00%7100.00%
Directory: net/netfilter
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