/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef _TRANSP_V6_H
  #define _TRANSP_V6_H
  
  #include <net/checksum.h>

  /* IPv6 transport protocols */
  extern struct proto rawv6_prot;
  extern struct proto udpv6_prot;
  extern struct proto udplitev6_prot;
  extern struct proto tcpv6_prot;
  extern struct proto pingv6_prot;

  struct flowi6;

  /* extension headers */

  int ipv6_exthdrs_init(void);
  void ipv6_exthdrs_exit(void);
  int ipv6_frag_init(void);
  void ipv6_frag_exit(void);

  
  /* transport protocols */

  int pingv6_init(void);
  void pingv6_exit(void);
  int rawv6_init(void);
  void rawv6_exit(void);
  int udpv6_init(void);
  void udpv6_exit(void);
  int udplitev6_init(void);
  void udplitev6_exit(void);
  int tcpv6_init(void);
  void tcpv6_exit(void);

  int udpv6_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);

  /* this does all the common and the specific ctl work */
  void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
  			   struct sk_buff *skb);
  void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg,
  				  struct sk_buff *skb);
  void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg,
  				    struct sk_buff *skb);

  int ip6_datagram_send_ctl(struct net *net, struct sock *sk, struct msghdr *msg,

  			  struct flowi6 *fl6, struct ipcm6_cookie *ipc6);

  void __ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp,
  			       __u16 srcp, __u16 destp, int rqueue, int bucket);
  static inline void
  ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, __u16 srcp,
  			__u16 destp, int bucket)
  {
  	__ip6_dgram_sock_seq_show(seq, sp, srcp, destp, sk_rmem_alloc_get(sp),
  				  bucket);
  }

  #define LOOPBACK4_IPV6 cpu_to_be32(0x7f000006)

  void inet6_destroy_sock(struct sock *sk);

  #define IPV6_SEQ_DGRAM_HEADER					       \
  	"  sl  "						       \
  	"local_address                         "		       \
  	"remote_address                        "		       \
  	"st tx_queue rx_queue tr tm->when retrnsmt"		       \
  	"   uid  timeout inode ref pointer drops
  "

  #endif