cregit-Linux how code gets into the kernel

Release 4.11 net/netfilter/nft_reject_inet.c

Directory: net/netfilter
/*
 * Copyright (c) 2014 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/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 <net/netfilter/ipv4/nf_reject.h>
#include <net/netfilter/ipv6/nf_reject.h>


static void nft_reject_inet_eval(const struct nft_expr *expr, struct nft_regs *regs, const struct nft_pktinfo *pkt) { struct nft_reject *priv = nft_expr_priv(expr); switch (nft_pf(pkt)) { case NFPROTO_IPV4: switch (priv->type) { case NFT_REJECT_ICMP_UNREACH: nf_send_unreach(pkt->skb, priv->icmp_code, nft_hook(pkt)); break; case NFT_REJECT_TCP_RST: nf_send_reset(nft_net(pkt), pkt->skb, nft_hook(pkt)); break; case NFT_REJECT_ICMPX_UNREACH: nf_send_unreach(pkt->skb, nft_reject_icmp_code(priv->icmp_code), nft_hook(pkt)); break; } break; case NFPROTO_IPV6: switch (priv->type) { case NFT_REJECT_ICMP_UNREACH: nf_send_unreach6(nft_net(pkt), pkt->skb, priv->icmp_code, nft_hook(pkt)); break; case NFT_REJECT_TCP_RST: nf_send_reset6(nft_net(pkt), pkt->skb, nft_hook(pkt)); break; case NFT_REJECT_ICMPX_UNREACH: nf_send_unreach6(nft_net(pkt), pkt->skb, nft_reject_icmpv6_code(priv->icmp_code), nft_hook(pkt)); break; } break; } regs->verdict.code = NF_DROP; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso15573.11%228.57%
Patrick McHardy4722.17%228.57%
Eric W. Biedermann62.83%228.57%
Florian Westphal41.89%114.29%
Total212100.00%7100.00%


static int nft_reject_inet_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 icmp_code, 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: case NFT_REJECT_ICMPX_UNREACH: if (tb[NFTA_REJECT_ICMP_CODE] == NULL) return -EINVAL; icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]); if (priv->type == NFT_REJECT_ICMPX_UNREACH && icmp_code > NFT_REJECT_ICMPX_MAX) return -EINVAL; priv->icmp_code = icmp_code; break; case NFT_REJECT_TCP_RST: break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso13785.09%125.00%
Liping Zhang2213.66%125.00%
Patrick McHardy21.24%250.00%
Total161100.00%4100.00%


static int nft_reject_inet_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: case NFT_REJECT_ICMPX_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
Pablo Neira Ayuso8696.63%133.33%
David S. Miller22.25%133.33%
Patrick McHardy11.12%133.33%
Total89100.00%3100.00%

static struct nft_expr_type nft_reject_inet_type; static const struct nft_expr_ops nft_reject_inet_ops = { .type = &nft_reject_inet_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)), .eval = nft_reject_inet_eval, .init = nft_reject_inet_init, .dump = nft_reject_inet_dump, .validate = nft_reject_validate, }; static struct nft_expr_type nft_reject_inet_type __read_mostly = { .family = NFPROTO_INET, .name = "reject", .ops = &nft_reject_inet_ops, .policy = nft_reject_policy, .maxattr = NFTA_REJECT_MAX, .owner = THIS_MODULE, };
static int __init nft_reject_inet_module_init(void) { return nft_register_expr(&nft_reject_inet_type); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy16100.00%1100.00%
Total16100.00%1100.00%


static void __exit nft_reject_inet_module_exit(void) { nft_unregister_expr(&nft_reject_inet_type); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy15100.00%1100.00%
Total15100.00%1100.00%

module_init(nft_reject_inet_module_init); module_exit(nft_reject_inet_module_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_ALIAS_NFT_AF_EXPR(1, "reject");

Overall Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso38660.22%220.00%
Patrick McHardy21633.70%330.00%
Liping Zhang274.21%110.00%
Eric W. Biedermann60.94%220.00%
Florian Westphal40.62%110.00%
David S. Miller20.31%110.00%
Total641100.00%10100.00%
Directory: net/netfilter
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.