/* * :ts=8 * * 'Roadshow' -- Amiga TCP/IP stack * Copyright © 2001-2016 by Olaf Barthel. * All Rights Reserved. * * Amiga specific TCP/IP 'C' header files; * Freely Distributable */ /* * Copyright (c) 1982, 1986, 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)mbuf.h 8.5 (Berkeley) 2/19/95 */ #ifndef _SYS_MBUF_H #define _SYS_MBUF_H /****************************************************************************/ #ifndef _SYS_NETINCLUDE_TYPES_H #include #endif /* _SYS_NETINCLUDE_TYPES_H */ #ifndef _NET_IF_H #include #endif /* _NET_IF_H */ /****************************************************************************/ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /****************************************************************************/ #ifdef __GNUC__ #ifdef __PPC__ #pragma pack(2) #endif #elif defined(__VBCC__) #pragma amiga-align #endif /****************************************************************************/ /* * Constants related to network buffer management. * MCLBYTES must be no larger than CLBYTES (the software page size), and, * on machines that exchange pages of input or output buffers with mbuf * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple * of the hardware page size. */ #define MSIZE 128 /* size of an mbuf */ #define MCLBYTES 2048 /* large enough for ether MTU */ #define MCLSHIFT 11 #define MCLOFSET (MCLBYTES - 1) /* * Mbufs are of a single size, MSIZE (machine/machparam.h), which * includes overhead. An mbuf may add a single "mbuf cluster" of size * MCLBYTES (also in machine/machparam.h), which has no additional overhead * and is used instead of the internal data area; this is done when * at least MINCLSIZE of data must be stored. */ #define MLEN (MSIZE - sizeof(struct m_hdr)) /* normal data len */ #define MHLEN (MLEN - sizeof(struct pkthdr)) /* data len w/pkthdr */ #define MINCLSIZE (MHLEN + 1) /* smallest amount to put in cluster */ #define M_MAXCOMPRESS (MHLEN / 2) /* max amount to copy for compression */ /* * Macros for type conversion * mtod(m,t) - convert mbuf pointer to data pointer of correct type * dtom(x) - convert data pointer within mbuf to mbuf pointer (XXX) */ #define mtod(m,t) ((t)((m)->m_data)) #define dtom(x) ((struct mbuf *)((__ULONG)(x) & ~(MSIZE-1))) /* header at beginning of each mbuf: */ struct m_hdr { struct mbuf *mh_next; /* next buffer in chain */ struct mbuf *mh_nextpkt; /* next chain in queue/record */ __APTR mh_data; /* location of data */ __LONG mh_len; /* amount of data in this mbuf */ __WORD mh_type; /* type of data in this mbuf */ __WORD mh_flags; /* flags; see below */ }; /* record/packet header in first mbuf of chain; valid if M_PKTHDR set */ struct pkthdr { struct ifnet *rcvif; /* rcv interface */ __LONG len; /* total packet length */ }; /* description of external storage mapped into mbuf, valid if M_EXT set */ struct m_ext { __APTR ext_buf; /* start of buffer */ __APTR ext_free; /* free routine if not the usual */ __ULONG ext_size; /* size of buffer, for ext_free */ }; struct mbuf { struct m_hdr m_hdr; union { struct { struct pkthdr MH_pkthdr; /* M_PKTHDR set */ union { struct m_ext MH_ext; /* M_EXT set */ __UBYTE MH_databuf[MHLEN]; } MH_dat; } MH; __UBYTE M_databuf[MLEN]; /* !M_PKTHDR, !M_EXT */ } M_dat; }; #define m_next m_hdr.mh_next #define m_len m_hdr.mh_len #define m_data m_hdr.mh_data #define m_type m_hdr.mh_type #define m_flags m_hdr.mh_flags #define m_nextpkt m_hdr.mh_nextpkt #define m_act m_nextpkt #define m_pkthdr M_dat.MH.MH_pkthdr #define m_ext M_dat.MH.MH_dat.MH_ext #define m_pktdat M_dat.MH.MH_dat.MH_databuf #define m_dat M_dat.M_databuf /* mbuf flags */ #define M_EXT 0x0001 /* has associated external storage */ #define M_PKTHDR 0x0002 /* start of record */ #define M_EOR 0x0004 /* end of record */ /* mbuf pkthdr flags, also in m_flags */ #define M_BCAST 0x0100 /* send/received as link-level broadcast */ #define M_MCAST 0x0200 /* send/received as link-level multicast */ /* flags copied when copying m_pkthdr */ #define M_COPYFLAGS (M_PKTHDR|M_EOR|M_BCAST|M_MCAST) /* length to m_copy to copy all */ #define M_COPYALL 1000000000 /* * Mbuf statistics. */ struct mbstat { __ULONG m_mbufs; /* mbufs obtained from page pool */ __ULONG m_clusters; /* clusters obtained from page pool */ __ULONG m_spare; /* spare field */ __ULONG m_clfree; /* free clusters */ __ULONG m_drops; /* times failed to find space */ __ULONG m_wait; /* times waited for space */ __ULONG m_drain; /* times drained protocols for space */ }; /****************************************************************************/ #ifdef __GNUC__ #ifdef __PPC__ #pragma pack() #endif #elif defined(__VBCC__) #pragma default-align #endif /****************************************************************************/ #ifdef __cplusplus } #endif /* __cplusplus */ /****************************************************************************/ #endif /* _SYS_MBUF_H */