diff options
Diffstat (limited to 'net/ipv6/netfilter/nf_tables_ipv6.c')
| -rw-r--r-- | net/ipv6/netfilter/nf_tables_ipv6.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/net/ipv6/netfilter/nf_tables_ipv6.c b/net/ipv6/netfilter/nf_tables_ipv6.c new file mode 100644 index 000000000000..d77db8a13505 --- /dev/null +++ b/net/ipv6/netfilter/nf_tables_ipv6.c @@ -0,0 +1,127 @@ +/* + * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> + * Copyright (c) 2012-2013 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/init.h> +#include <linux/module.h> +#include <linux/ipv6.h> +#include <linux/netfilter_ipv6.h> +#include <net/netfilter/nf_tables.h> +#include <net/netfilter/nf_tables_ipv6.h> + +static unsigned int nft_ipv6_output(const struct nf_hook_ops *ops, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) +{ + struct nft_pktinfo pkt; + + if (unlikely(skb->len < sizeof(struct ipv6hdr))) { + if (net_ratelimit()) + pr_info("nf_tables_ipv6: ignoring short SOCK_RAW " + "packet\n"); + return NF_ACCEPT; + } + if (nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out) < 0) + return NF_DROP; + + return nft_do_chain_pktinfo(&pkt, ops); +} + +static struct nft_af_info nft_af_ipv6 __read_mostly = { + .family = NFPROTO_IPV6, + .nhooks = NF_INET_NUMHOOKS, + .owner = THIS_MODULE, + .hooks = { + [NF_INET_LOCAL_OUT] = nft_ipv6_output, + }, +}; + +static int nf_tables_ipv6_init_net(struct net *net) +{ + net->nft.ipv6 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL); + if (net->nft.ipv6 == NULL) + return -ENOMEM; + + memcpy(net->nft.ipv6, &nft_af_ipv6, sizeof(nft_af_ipv6)); + + if (nft_register_afinfo(net, net->nft.ipv6) < 0) + goto err; + + return 0; +err: + kfree(net->nft.ipv6); + return -ENOMEM; +} + +static void nf_tables_ipv6_exit_net(struct net *net) +{ + nft_unregister_afinfo(net->nft.ipv6); + kfree(net->nft.ipv6); +} + +static struct pernet_operations nf_tables_ipv6_net_ops = { + .init = nf_tables_ipv6_init_net, + .exit = nf_tables_ipv6_exit_net, +}; + +static unsigned int +nft_do_chain_ipv6(const struct nf_hook_ops *ops, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) +{ + struct nft_pktinfo pkt; + + /* malformed packet, drop it */ + if (nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out) < 0) + return NF_DROP; + + return nft_do_chain_pktinfo(&pkt, ops); +} + +static struct nf_chain_type filter_ipv6 = { + .family = NFPROTO_IPV6, + .name = "filter", + .type = NFT_CHAIN_T_DEFAULT, + .hook_mask = (1 << NF_INET_LOCAL_IN) | + (1 << NF_INET_LOCAL_OUT) | + (1 << NF_INET_FORWARD) | + (1 << NF_INET_PRE_ROUTING) | + (1 << NF_INET_POST_ROUTING), + .fn = { + [NF_INET_LOCAL_IN] = nft_do_chain_ipv6, + [NF_INET_LOCAL_OUT] = nft_ipv6_output, + [NF_INET_FORWARD] = nft_do_chain_ipv6, + [NF_INET_PRE_ROUTING] = nft_do_chain_ipv6, + [NF_INET_POST_ROUTING] = nft_do_chain_ipv6, + }, +}; + +static int __init nf_tables_ipv6_init(void) +{ + nft_register_chain_type(&filter_ipv6); + return register_pernet_subsys(&nf_tables_ipv6_net_ops); +} + +static void __exit nf_tables_ipv6_exit(void) +{ + unregister_pernet_subsys(&nf_tables_ipv6_net_ops); + nft_unregister_chain_type(&filter_ipv6); +} + +module_init(nf_tables_ipv6_init); +module_exit(nf_tables_ipv6_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); +MODULE_ALIAS_NFT_FAMILY(AF_INET6); |