2005-04-16 22:20:36 +00:00
|
|
|
/* IPv6-specific defines for netfilter.
|
|
|
|
* (C)1998 Rusty Russell -- This code is GPL.
|
|
|
|
* (C)1999 David Jeffery
|
2019-09-13 08:13:02 +00:00
|
|
|
* this header was blatantly ripped from netfilter_ipv4.h
|
2005-04-16 22:20:36 +00:00
|
|
|
* it's amazing what adding a bunch of 6s can do =8^)
|
|
|
|
*/
|
2012-10-13 09:46:48 +00:00
|
|
|
#ifndef __LINUX_IP6_NETFILTER_H
|
|
|
|
#define __LINUX_IP6_NETFILTER_H
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2012-10-13 09:46:48 +00:00
|
|
|
#include <uapi/linux/netfilter_ipv6.h>
|
2019-06-07 00:36:05 +00:00
|
|
|
#include <net/tcp.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2019-09-13 08:13:07 +00:00
|
|
|
/* Check for an extension */
|
|
|
|
static inline int
|
|
|
|
nf_ip6_ext_hdr(u8 nexthdr)
|
|
|
|
{ return (nexthdr == IPPROTO_HOPOPTS) ||
|
|
|
|
(nexthdr == IPPROTO_ROUTING) ||
|
|
|
|
(nexthdr == IPPROTO_FRAGMENT) ||
|
|
|
|
(nexthdr == IPPROTO_ESP) ||
|
|
|
|
(nexthdr == IPPROTO_AH) ||
|
|
|
|
(nexthdr == IPPROTO_NONE) ||
|
|
|
|
(nexthdr == IPPROTO_DSTOPTS);
|
|
|
|
}
|
|
|
|
|
2017-12-20 15:12:55 +00:00
|
|
|
/* Extra routing may needed on local out, as the QUEUE target never returns
|
|
|
|
* control to the table.
|
|
|
|
*/
|
|
|
|
struct ip6_rt_info {
|
|
|
|
struct in6_addr daddr;
|
|
|
|
struct in6_addr saddr;
|
|
|
|
u_int32_t mark;
|
|
|
|
};
|
|
|
|
|
2017-11-27 21:50:26 +00:00
|
|
|
struct nf_queue_entry;
|
2019-09-13 08:13:09 +00:00
|
|
|
struct nf_bridge_frag_data;
|
2017-11-27 21:50:26 +00:00
|
|
|
|
2013-05-17 03:56:10 +00:00
|
|
|
/*
|
|
|
|
* Hook functions for ipv6 to allow xt_* modules to be built-in even
|
|
|
|
* if IPv6 is a module.
|
|
|
|
*/
|
|
|
|
struct nf_ipv6_ops {
|
2019-02-02 09:17:00 +00:00
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
2013-05-17 03:56:10 +00:00
|
|
|
int (*chk_addr)(struct net *net, const struct in6_addr *addr,
|
|
|
|
const struct net_device *dev, int strict);
|
2019-02-02 09:16:59 +00:00
|
|
|
int (*route_me_harder)(struct net *net, struct sk_buff *skb);
|
|
|
|
int (*dev_get_saddr)(struct net *net, const struct net_device *dev,
|
|
|
|
const struct in6_addr *daddr, unsigned int srcprefs,
|
|
|
|
struct in6_addr *saddr);
|
2019-02-02 09:17:00 +00:00
|
|
|
int (*route)(struct net *net, struct dst_entry **dst, struct flowi *fl,
|
|
|
|
bool strict);
|
2019-06-07 00:36:05 +00:00
|
|
|
u32 (*cookie_init_sequence)(const struct ipv6hdr *iph,
|
|
|
|
const struct tcphdr *th, u16 *mssp);
|
|
|
|
int (*cookie_v6_check)(const struct ipv6hdr *iph,
|
|
|
|
const struct tcphdr *th, __u32 cookie);
|
2019-02-02 09:16:59 +00:00
|
|
|
#endif
|
2019-02-02 09:17:00 +00:00
|
|
|
void (*route_input)(struct sk_buff *skb);
|
|
|
|
int (*fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
|
|
|
|
int (*output)(struct net *, struct sock *, struct sk_buff *));
|
|
|
|
int (*reroute)(struct sk_buff *skb, const struct nf_queue_entry *entry);
|
2019-05-29 11:25:38 +00:00
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
int (*br_fragment)(struct net *net, struct sock *sk,
|
|
|
|
struct sk_buff *skb,
|
2019-09-13 08:13:09 +00:00
|
|
|
struct nf_bridge_frag_data *data,
|
2019-05-29 11:25:38 +00:00
|
|
|
int (*output)(struct net *, struct sock *sk,
|
2019-09-13 08:13:09 +00:00
|
|
|
const struct nf_bridge_frag_data *data,
|
2019-05-29 11:25:38 +00:00
|
|
|
struct sk_buff *));
|
|
|
|
#endif
|
2013-05-17 03:56:10 +00:00
|
|
|
};
|
|
|
|
|
2015-08-27 22:25:45 +00:00
|
|
|
#ifdef CONFIG_NETFILTER
|
2019-02-02 09:17:00 +00:00
|
|
|
#include <net/addrconf.h>
|
2015-08-27 22:25:45 +00:00
|
|
|
|
2013-05-17 03:56:10 +00:00
|
|
|
extern const struct nf_ipv6_ops __rcu *nf_ipv6_ops;
|
|
|
|
static inline const struct nf_ipv6_ops *nf_get_ipv6_ops(void)
|
|
|
|
{
|
|
|
|
return rcu_dereference(nf_ipv6_ops);
|
|
|
|
}
|
|
|
|
|
2019-02-02 09:17:00 +00:00
|
|
|
static inline int nf_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
|
|
|
|
const struct net_device *dev, int strict)
|
|
|
|
{
|
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
|
|
|
|
|
|
|
|
if (!v6_ops)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return v6_ops->chk_addr(net, addr, dev, strict);
|
2019-06-17 13:15:04 +00:00
|
|
|
#elif IS_BUILTIN(CONFIG_IPV6)
|
2019-02-02 09:17:00 +00:00
|
|
|
return ipv6_chk_addr(net, addr, dev, strict);
|
2019-06-17 13:15:04 +00:00
|
|
|
#else
|
|
|
|
return 1;
|
2019-02-02 09:17:00 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
int __nf_ip6_route(struct net *net, struct dst_entry **dst,
|
|
|
|
struct flowi *fl, bool strict);
|
|
|
|
|
|
|
|
static inline int nf_ip6_route(struct net *net, struct dst_entry **dst,
|
|
|
|
struct flowi *fl, bool strict)
|
|
|
|
{
|
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
|
|
|
|
|
|
|
|
if (v6ops)
|
|
|
|
return v6ops->route(net, dst, fl, strict);
|
|
|
|
|
|
|
|
return -EHOSTUNREACH;
|
|
|
|
#endif
|
|
|
|
#if IS_BUILTIN(CONFIG_IPV6)
|
|
|
|
return __nf_ip6_route(net, dst, fl, strict);
|
|
|
|
#else
|
|
|
|
return -EHOSTUNREACH;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2019-05-31 09:15:26 +00:00
|
|
|
#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
|
|
|
|
|
2019-05-29 11:25:38 +00:00
|
|
|
int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
|
2019-09-13 08:13:09 +00:00
|
|
|
struct nf_bridge_frag_data *data,
|
2019-05-29 11:25:38 +00:00
|
|
|
int (*output)(struct net *, struct sock *sk,
|
2019-09-13 08:13:09 +00:00
|
|
|
const struct nf_bridge_frag_data *data,
|
2019-05-29 11:25:38 +00:00
|
|
|
struct sk_buff *));
|
|
|
|
|
|
|
|
static inline int nf_br_ip6_fragment(struct net *net, struct sock *sk,
|
|
|
|
struct sk_buff *skb,
|
2019-09-13 08:13:09 +00:00
|
|
|
struct nf_bridge_frag_data *data,
|
2019-05-29 11:25:38 +00:00
|
|
|
int (*output)(struct net *, struct sock *sk,
|
2019-09-13 08:13:09 +00:00
|
|
|
const struct nf_bridge_frag_data *data,
|
2019-05-29 11:25:38 +00:00
|
|
|
struct sk_buff *))
|
|
|
|
{
|
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
|
|
|
|
|
|
|
|
if (!v6_ops)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return v6_ops->br_fragment(net, sk, skb, data, output);
|
2019-06-17 13:15:04 +00:00
|
|
|
#elif IS_BUILTIN(CONFIG_IPV6)
|
2019-05-29 11:25:38 +00:00
|
|
|
return br_ip6_fragment(net, sk, skb, data, output);
|
2019-06-17 13:15:04 +00:00
|
|
|
#else
|
|
|
|
return 1;
|
2019-05-29 11:25:38 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2019-02-02 09:17:00 +00:00
|
|
|
int ip6_route_me_harder(struct net *net, struct sk_buff *skb);
|
2019-03-27 08:22:25 +00:00
|
|
|
|
|
|
|
static inline int nf_ip6_route_me_harder(struct net *net, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
|
|
|
|
|
|
|
|
if (!v6_ops)
|
|
|
|
return -EHOSTUNREACH;
|
|
|
|
|
|
|
|
return v6_ops->route_me_harder(net, skb);
|
2019-06-17 13:15:04 +00:00
|
|
|
#elif IS_BUILTIN(CONFIG_IPV6)
|
2019-03-27 08:22:25 +00:00
|
|
|
return ip6_route_me_harder(net, skb);
|
2019-06-17 13:15:04 +00:00
|
|
|
#else
|
|
|
|
return -EHOSTUNREACH;
|
2019-03-27 08:22:25 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2019-06-07 00:36:05 +00:00
|
|
|
static inline u32 nf_ipv6_cookie_init_sequence(const struct ipv6hdr *iph,
|
|
|
|
const struct tcphdr *th,
|
|
|
|
u16 *mssp)
|
|
|
|
{
|
2019-06-19 12:54:36 +00:00
|
|
|
#if IS_ENABLED(CONFIG_SYN_COOKIES)
|
2019-06-07 00:36:05 +00:00
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
|
|
|
|
|
|
|
|
if (v6_ops)
|
|
|
|
return v6_ops->cookie_init_sequence(iph, th, mssp);
|
2019-06-19 12:54:36 +00:00
|
|
|
#elif IS_BUILTIN(CONFIG_IPV6)
|
2019-06-07 00:36:05 +00:00
|
|
|
return __cookie_v6_init_sequence(iph, th, mssp);
|
|
|
|
#endif
|
2019-06-19 12:54:36 +00:00
|
|
|
#endif
|
|
|
|
return 0;
|
2019-06-07 00:36:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline int nf_cookie_v6_check(const struct ipv6hdr *iph,
|
|
|
|
const struct tcphdr *th, __u32 cookie)
|
|
|
|
{
|
2019-06-19 12:54:36 +00:00
|
|
|
#if IS_ENABLED(CONFIG_SYN_COOKIES)
|
2019-06-07 00:36:05 +00:00
|
|
|
#if IS_MODULE(CONFIG_IPV6)
|
|
|
|
const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
|
|
|
|
|
|
|
|
if (v6_ops)
|
|
|
|
return v6_ops->cookie_v6_check(iph, th, cookie);
|
2019-06-19 12:54:36 +00:00
|
|
|
#elif IS_BUILTIN(CONFIG_IPV6)
|
2019-06-07 00:36:05 +00:00
|
|
|
return __cookie_v6_check(iph, th, cookie);
|
|
|
|
#endif
|
2019-06-19 12:54:36 +00:00
|
|
|
#endif
|
|
|
|
return 0;
|
2019-06-07 00:36:05 +00:00
|
|
|
}
|
|
|
|
|
2019-02-02 09:17:00 +00:00
|
|
|
__sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
|
|
|
|
unsigned int dataoff, u_int8_t protocol);
|
|
|
|
|
|
|
|
int ipv6_netfilter_init(void);
|
|
|
|
void ipv6_netfilter_fini(void);
|
|
|
|
|
2006-01-10 00:43:13 +00:00
|
|
|
#else /* CONFIG_NETFILTER */
|
|
|
|
static inline int ipv6_netfilter_init(void) { return 0; }
|
|
|
|
static inline void ipv6_netfilter_fini(void) { return; }
|
2015-08-27 22:25:45 +00:00
|
|
|
static inline const struct nf_ipv6_ops *nf_get_ipv6_ops(void) { return NULL; }
|
2006-01-10 00:43:13 +00:00
|
|
|
#endif /* CONFIG_NETFILTER */
|
2005-08-10 02:42:34 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
#endif /*__LINUX_IP6_NETFILTER_H*/
|