/* SPDX-License-Identifier: GPL-2.0-or-later */
  /*
   *  RPL implementation
   *
   *  Author:
   *  (C) 2020 Alexander Aring <alex.aring@gmail.com>
   */
  
  #ifndef _NET_RPL_H
  #define _NET_RPL_H
  
  #include <linux/rpl.h>

  #if IS_ENABLED(CONFIG_IPV6_RPL_LWTUNNEL)
  extern int rpl_init(void);
  extern void rpl_exit(void);
  #else
  static inline int rpl_init(void)
  {
  	return 0;
  }
  
  static inline void rpl_exit(void) {}
  #endif

  /* Worst decompression memory usage ipv6 address (16) + pad 7 */
  #define IPV6_RPL_SRH_WORST_SWAP_SIZE (sizeof(struct in6_addr) + 7)

  size_t ipv6_rpl_srh_size(unsigned char n, unsigned char cmpri,
  			 unsigned char cmpre);
  
  void ipv6_rpl_srh_decompress(struct ipv6_rpl_sr_hdr *outhdr,
  			     const struct ipv6_rpl_sr_hdr *inhdr,
  			     const struct in6_addr *daddr, unsigned char n);
  
  void ipv6_rpl_srh_compress(struct ipv6_rpl_sr_hdr *outhdr,
  			   const struct ipv6_rpl_sr_hdr *inhdr,
  			   const struct in6_addr *daddr, unsigned char n);
  
  #endif /* _NET_RPL_H */