include/net/rpl.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  RPL implementation
   4  *
   5  *  Author:
   6  *  (C) 2020 Alexander Aring <alex.aring@gmail.com>
   7  */
   8
   9 #ifndef _NET_RPL_H
  10 #define _NET_RPL_H
  11
  12 #include <linux/rpl.h>
  13
  14 #if IS_ENABLED(CONFIG_IPV6_RPL_LWTUNNEL)
  15 extern int rpl_init(void);
  16 extern void rpl_exit(void);
  17 #else
  18 static inline int rpl_init(void)
  19 {
  20         return 0;
  21 }
  22
  23 static inline void rpl_exit(void) {}
  24 #endif
  25
  26 /* Worst decompression memory usage ipv6 address (16) + pad 7 */
  27 #define IPV6_RPL_SRH_WORST_SWAP_SIZE (sizeof(struct in6_addr) + 7)
  28
  29 static inline size_t ipv6_rpl_srh_alloc_size(unsigned char n)
  30 {
  31         return sizeof(struct ipv6_rpl_sr_hdr) +
  32                 ((n + 1) * sizeof(struct in6_addr));
  33 }
  34
  35 size_t ipv6_rpl_srh_size(unsigned char n, unsigned char cmpri,
  36                          unsigned char cmpre);
  37
  38 void ipv6_rpl_srh_decompress(struct ipv6_rpl_sr_hdr *outhdr,
  39                              const struct ipv6_rpl_sr_hdr *inhdr,
  40                              const struct in6_addr *daddr, unsigned char n);
  41
  42 void ipv6_rpl_srh_compress(struct ipv6_rpl_sr_hdr *outhdr,
  43                            const struct ipv6_rpl_sr_hdr *inhdr,
  44                            const struct in6_addr *daddr, unsigned char n);
  45
  46 #endif /* _NET_RPL_H */