freebsd/sys/netinet/sctp_os_bsd.h

/*-
 * Copyright (c) 2006, Cisco Systems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * a) Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * b) Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the distribution.
 *
 * c) Neither the name of Cisco Systems, Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef __sctp_os_bsd_h__
#define __sctp_os_bsd_h__

/*
 * includes
 */
#include <sys/random.h>

/*
 *
 */
typedef struct mbuf *sctp_mbuf_t;

#define USER_ADDR_NULL	(NULL)	/* FIX ME: temp */

/*
 * general memory allocation
 */
#define SCTP_MALLOC(var, type, size, name) \
    do { \
	MALLOC(var, type, size, M_PCB, M_NOWAIT); \
    } while (0)

#define SCTP_FREE(var)	FREE(var, M_PCB)

#define SCTP_MALLOC_SONAME(var, type, size) \
    do { \
	MALLOC(var, type, size, M_SONAME, M_WAITOK | M_ZERO); \
    } while (0)

#define SCTP_FREE_SONAME(var)	FREE(var, M_SONAME)

/*
 * zone allocation functions
 */
#include <vm/uma.h>
/* SCTP_ZONE_INIT: initialize the zone */
typedef struct uma_zone *sctp_zone_t;

#define UMA_ZFLAG_FULL	0x0020
#define SCTP_ZONE_INIT(zone, name, size, number) { \
	zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
		UMA_ZFLAG_FULL); \
	uma_zone_set_max(zone, number); \
}

/* SCTP_ZONE_GET: allocate element from the zone */
#define SCTP_ZONE_GET(zone) \
	uma_zalloc(zone, M_NOWAIT);

/* SCTP_ZONE_FREE: free element from the zone */
#define SCTP_ZONE_FREE(zone, element) \
	uma_zfree(zone, element);
#define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
#define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)

#define SCTP_M_COPYM	m_copym

/*
 * timers
 */
#include <sys/callout.h>
typedef struct callout sctp_os_timer_t;

#define SCTP_OS_TIMER_INIT(tmr)	callout_init(tmr, 1)
#define SCTP_OS_TIMER_START	callout_reset
#define SCTP_OS_TIMER_STOP	callout_stop
#define SCTP_OS_TIMER_STOP_DRAIN callout_drain
#define SCTP_OS_TIMER_PENDING	callout_pending
#define SCTP_OS_TIMER_ACTIVE	callout_active
#define SCTP_OS_TIMER_DEACTIVATE callout_deactivate

/*
 * Functions
 */
#define SCTP_READ_RANDOM(buf, len)	read_random(buf, len)

/* Mbuf manipulation and access macros  */
#define SCTP_BUF_LEN(m) (m->m_len)
#define SCTP_BUF_NEXT(m) (m->m_next)
#define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
#define SCTP_BUF_RESV_UF(m, size) m->m_data += size
#define SCTP_BUF_AT(m, size) m->m_data + size
#define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
#define SCTP_BUF_EXTEND_SIZE(m) (m->m_ext.ext_size)
#define SCTP_BUF_TYPE(m) (m->m_type)
#define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
#define SCTP_BUF_PREPEND	M_PREPEND
/*************************/
/* These are for logging */
/*************************/
/* return the base ext data pointer */
#define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
 /* return the refcnt of the data pointer */
#define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ref_cnt)
/* return any buffer related flags, this is
 * used beyond logging for apple only.
 */
#define SCTP_BUF_GET_FLAGS(m) (m->m_flags)

/* For BSD this just accesses the M_PKTHDR length
 * so it operates on an mbuf with hdr flag. Other
 * O/S's may have seperate packet header and mbuf
 * chain pointers.. thus the macro.
 */
#define SCTP_HEADER_TO_CHAIN(m) (m)
#define SCTP_HEADER_LEN(m) (m->m_pkthdr.len)
#define SCTP_GET_HEADER_FOR_OUTPUT(len) sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA)

/* Attach the chain of data into the sendable packet. */
#define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
                                                 pak->m_next = m; \
                                                 pak->m_pkthdr.len = packet_length; \
                         } while(0)

/* Other m_pkthdr type things */
#define SCTP_IS_IT_BROADCAST(dst, m) in_broadcast(dst, m->m_pkthdr.rcvif)
#define SCTP_IS_IT_LOOPBACK(m) ((m->m_pkthdr.rcvif == NULL) ||(m->m_pkthdr.rcvif->if_type == IFT_LOOP))


/* This converts any input packet header
 * into the chain of data holders, for BSD
 * its a NOP.
 */
#define SCTP_PAK_TO_BUF(i_pak) (i_pak)

/* Macro's for getting length from V6/V4 header */
#define SCTP_GET_IPV4_LENGTH(iph) (iph->ip_len)
#define SCTP_GET_IPV6_LENGTH(ip6) (ntohs(ip6->ip6_plen))

/* is the endpoint v6only? */
#define SCTP_IPV6_V6ONLY(inp)	(((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)


#endif