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 */ 47