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- /* IPv6-specific defines for netfilter.
- * (C)1998 Rusty Russell -- This code is GPL.
- * (C)1999 David Jeffery
- * this header was blatantly ripped from netfilter_ipv4.h
- * it's amazing what adding a bunch of 6s can do =8^)
- */
- #ifndef __LINUX_IP6_NETFILTER_H
- #define __LINUX_IP6_NETFILTER_H
- #include <linux/android_kabi.h>
- #include <uapi/linux/netfilter_ipv6.h>
- #include <net/tcp.h>
- /* 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);
- }
- /* 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;
- };
- struct nf_queue_entry;
- struct nf_bridge_frag_data;
- /*
- * Hook functions for ipv6 to allow xt_* modules to be built-in even
- * if IPv6 is a module.
- */
- struct nf_ipv6_ops {
- #if IS_MODULE(CONFIG_IPV6)
- int (*chk_addr)(struct net *net, const struct in6_addr *addr,
- const struct net_device *dev, int strict);
- int (*route_me_harder)(struct net *net, struct sock *sk, 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);
- int (*route)(struct net *net, struct dst_entry **dst, struct flowi *fl,
- bool strict);
- 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);
- #endif
- 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);
- #if IS_MODULE(CONFIG_IPV6)
- int (*br_fragment)(struct net *net, struct sock *sk,
- struct sk_buff *skb,
- struct nf_bridge_frag_data *data,
- int (*output)(struct net *, struct sock *sk,
- const struct nf_bridge_frag_data *data,
- struct sk_buff *));
- #endif
- ANDROID_KABI_RESERVE(1);
- };
- #ifdef CONFIG_NETFILTER
- #include <net/addrconf.h>
- 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);
- }
- 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);
- #elif IS_BUILTIN(CONFIG_IPV6)
- return ipv6_chk_addr(net, addr, dev, strict);
- #else
- return 1;
- #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
- }
- #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
- int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
- struct nf_bridge_frag_data *data,
- int (*output)(struct net *, struct sock *sk,
- const struct nf_bridge_frag_data *data,
- struct sk_buff *));
- static inline int nf_br_ip6_fragment(struct net *net, struct sock *sk,
- struct sk_buff *skb,
- struct nf_bridge_frag_data *data,
- int (*output)(struct net *, struct sock *sk,
- const struct nf_bridge_frag_data *data,
- 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);
- #elif IS_BUILTIN(CONFIG_IPV6)
- return br_ip6_fragment(net, sk, skb, data, output);
- #else
- return 1;
- #endif
- }
- int ip6_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb);
- static inline int nf_ip6_route_me_harder(struct net *net, struct sock *sk, 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, sk, skb);
- #elif IS_BUILTIN(CONFIG_IPV6)
- return ip6_route_me_harder(net, sk, skb);
- #else
- return -EHOSTUNREACH;
- #endif
- }
- static inline u32 nf_ipv6_cookie_init_sequence(const struct ipv6hdr *iph,
- const struct tcphdr *th,
- u16 *mssp)
- {
- #if IS_ENABLED(CONFIG_SYN_COOKIES)
- #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);
- #elif IS_BUILTIN(CONFIG_IPV6)
- return __cookie_v6_init_sequence(iph, th, mssp);
- #endif
- #endif
- return 0;
- }
- static inline int nf_cookie_v6_check(const struct ipv6hdr *iph,
- const struct tcphdr *th, __u32 cookie)
- {
- #if IS_ENABLED(CONFIG_SYN_COOKIES)
- #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);
- #elif IS_BUILTIN(CONFIG_IPV6)
- return __cookie_v6_check(iph, th, cookie);
- #endif
- #endif
- return 0;
- }
- __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);
- #else /* CONFIG_NETFILTER */
- static inline int ipv6_netfilter_init(void) { return 0; }
- static inline void ipv6_netfilter_fini(void) { return; }
- static inline const struct nf_ipv6_ops *nf_get_ipv6_ops(void) { return NULL; }
- #endif /* CONFIG_NETFILTER */
- #endif /*__LINUX_IP6_NETFILTER_H*/
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