include/net/rpl.h

/* 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)

static inline size_t ipv6_rpl_srh_alloc_size(unsigned char n)
{
	return sizeof(struct ipv6_rpl_sr_hdr) +
		((n + 1) * sizeof(struct in6_addr));
}

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 */