cregit-Linux how code gets into the kernel

Release 4.7 net/ipv4/netfilter/nf_tables_arp.c

/*
 * Copyright (c) 2008-2010 Patrick McHardy <kaber@trash.net>
 * Copyright (c) 2013 Pablo Neira Ayuso <pablo@netfilter.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/module.h>
#include <linux/init.h>
#include <linux/netfilter_arp.h>
#include <net/netfilter/nf_tables.h>


static unsigned int nft_do_chain_arp(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); return nft_do_chain(&pkt, priv); }

Contributors

PersonTokensPropCommitsCommitProp
patrick mchardypatrick mchardy3986.67%250.00%
david s. millerdavid s. miller36.67%125.00%
eric w. biedermaneric w. biederman36.67%125.00%
Total45100.00%4100.00%

static struct nft_af_info nft_af_arp __read_mostly = { .family = NFPROTO_ARP, .nhooks = NF_ARP_NUMHOOKS, .owner = THIS_MODULE, .nops = 1, .hooks = { [NF_ARP_IN] = nft_do_chain_arp, [NF_ARP_OUT] = nft_do_chain_arp, [NF_ARP_FORWARD] = nft_do_chain_arp, }, };
static int nf_tables_arp_init_net(struct net *net) { net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL); if (net->nft.arp== NULL) return -ENOMEM; memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp)); if (nft_register_afinfo(net, net->nft.arp) < 0) goto err; return 0; err: kfree(net->nft.arp); return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
pablo neira ayusopablo neira ayuso95100.00%1100.00%
Total95100.00%1100.00%


static void nf_tables_arp_exit_net(struct net *net) { nft_unregister_afinfo(net, net->nft.arp); kfree(net->nft.arp); }

Contributors

PersonTokensPropCommitsCommitProp
pablo neira ayusopablo neira ayuso31100.00%2100.00%
Total31100.00%2100.00%

static struct pernet_operations nf_tables_arp_net_ops = { .init = nf_tables_arp_init_net, .exit = nf_tables_arp_exit_net, }; static const struct nf_chain_type filter_arp = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_ARP, .owner = THIS_MODULE, .hook_mask = (1 << NF_ARP_IN) | (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD), };
static int __init nf_tables_arp_init(void) { int ret; nft_register_chain_type(&filter_arp); ret = register_pernet_subsys(&nf_tables_arp_net_ops); if (ret < 0) nft_unregister_chain_type(&filter_arp); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
pablo neira ayusopablo neira ayuso41100.00%1100.00%
Total41100.00%1100.00%


static void __exit nf_tables_arp_exit(void) { unregister_pernet_subsys(&nf_tables_arp_net_ops); nft_unregister_chain_type(&filter_arp); }

Contributors

PersonTokensPropCommitsCommitProp
pablo neira ayusopablo neira ayuso21100.00%1100.00%
Total21100.00%1100.00%

module_init(nf_tables_arp_init); module_exit(nf_tables_arp_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_ALIAS_NFT_FAMILY(3); /* NFPROTO_ARP */

Overall Contributors

PersonTokensPropCommitsCommitProp
pablo neira ayusopablo neira ayuso30578.41%220.00%
patrick mchardypatrick mchardy7820.05%660.00%
david s. millerdavid s. miller30.77%110.00%
eric w. biedermaneric w. biederman30.77%110.00%
Total389100.00%10100.00%
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