/*
 * Copyright 2022, Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef _OBSD_COMPAT_SYS_MBUF_H_
#define _OBSD_COMPAT_SYS_MBUF_H_

#include <sys/systm.h>

/* FreeBSD KASSERT */
#undef KASSERT
#define KASSERT KASSERT_FREEBSD

#include_next <sys/mbuf.h>

/* back to OpenBSD KASSERT */
#undef KASSERT
#define KASSERT KASSERT_OPENBSD

#include <sys/mutex.h>


#define ph_cookie PH_loc.ptr

#define M_DATABUF(m)    M_START(m)
#define M_READONLY(m)   (!M_WRITABLE(m))

#define MAXMCLBYTES MJUM16BYTES

#define M_IPV4_CSUM_OUT         CSUM_IP
#define M_TCP_CSUM_OUT          CSUM_IP_TCP
#define M_UDP_CSUM_OUT          CSUM_IP_UDP
#define M_IPV4_CSUM_IN_OK       (CSUM_IP_CHECKED | CSUM_IP_VALID)
#define M_TCP_CSUM_IN_OK        (CSUM_DATA_VALID | CSUM_PSEUDO_HDR)
#define M_UDP_CSUM_IN_OK        (CSUM_DATA_VALID | CSUM_PSEUDO_HDR)


static struct mbuf*
MCLGETL(struct mbuf* m, int how, int size)
{
        if (m == NULL)
                return m_get3(size, how, MT_DATA, M_PKTHDR);

        m_cljget(m, how, size);
        return m;
}

static int
m_dup_pkthdr_openbsd(struct mbuf* to, const struct mbuf* from, int how)
{
        return !m_dup_pkthdr(to, from, how);
}
#define m_dup_pkthdr m_dup_pkthdr_openbsd

static int
m_tag_copy_chain_openbsd(struct mbuf* to, const struct mbuf* from, int how)
{
        return !m_tag_copy_chain(to, from, how);
}
#define m_tag_copy_chain m_tag_copy_chain_openbsd


/* FreeBSD methods not compatible with their OpenBSD counterparts */
#define m_defrag(mbuf, how) __m_defrag_unimplemented()


#include "mbuf-obsd.h"


#endif  /* _OBSD_COMPAT_SYS_MBUF_H_ */