LXR linux/include/net/netfilter/nf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _NF_SYNPROXY_SHARED_H
   3#define _NF_SYNPROXY_SHARED_H
   4
   5#include <linux/module.h>
   6#include <linux/skbuff.h>
   7#include <net/ip6_checksum.h>
   8#include <net/ip6_route.h>
   9#include <net/tcp.h>
  10
  11#include <net/netfilter/nf_conntrack_seqadj.h>
  12#include <net/netfilter/nf_conntrack_synproxy.h>
  13
  14void synproxy_send_client_synack(struct net *net, const struct sk_buff *skb,
  15                                 const struct tcphdr *th,
  16                                 const struct synproxy_options *opts);
  17
  18bool synproxy_recv_client_ack(struct net *net,
  19                              const struct sk_buff *skb,
  20                              const struct tcphdr *th,
  21                              struct synproxy_options *opts, u32 recv_seq);
  22
  23unsigned int ipv4_synproxy_hook(void *priv, struct sk_buff *skb,
  24                                const struct nf_hook_state *nhs);
  25int nf_synproxy_ipv4_init(struct synproxy_net *snet, struct net *net);
  26void nf_synproxy_ipv4_fini(struct synproxy_net *snet, struct net *net);
  27
  28#if IS_ENABLED(CONFIG_IPV6)
  29void synproxy_send_client_synack_ipv6(struct net *net,
  30                                      const struct sk_buff *skb,
  31                                      const struct tcphdr *th,
  32                                      const struct synproxy_options *opts);
  33
  34bool synproxy_recv_client_ack_ipv6(struct net *net, const struct sk_buff *skb,
  35                                   const struct tcphdr *th,
  36                                   struct synproxy_options *opts, u32 recv_seq);
  37
  38unsigned int ipv6_synproxy_hook(void *priv, struct sk_buff *skb,
  39                                const struct nf_hook_state *nhs);
  40int nf_synproxy_ipv6_init(struct synproxy_net *snet, struct net *net);
  41void nf_synproxy_ipv6_fini(struct synproxy_net *snet, struct net *net);
  42#else
  43static inline int
  44nf_synproxy_ipv6_init(struct synproxy_net *snet, struct net *net) { return 0; }
  45static inline void
  46nf_synproxy_ipv6_fini(struct synproxy_net *snet, struct net *net) {};
  47#endif /* CONFIG_IPV6 */
  48
  49#endif /* _NF_SYNPROXY_SHARED_H */
  50